JPH07332811A - Refrigerator, method for recovering refrigerant therefrom and method for modifying the same - Google Patents

Abstract

PURPOSE:To effect an economical and efficient refrigerant recovery by providing an inlet side stop valve on the inlet pipe of a condenser, an outlet side stop valve on the outlet pipe of the condenser and an airtight container connected between the inlet and outlet pipes via a stop valve for the airtight container. CONSTITUTION:A compressor 1 is started and, when an outlet side stop valve 14 is closed, the refrigerant in an evaporator 5 is sucked into and compressed by the compressor 1 and is held up in a condenser 2a. An inlet side stop valve 13 is closed and, when a joint of the inlet side stop valve 13 and the compressor 1 and a joint of the outlet side stop valve 14 and a throttling device 4 are both disconnected, the condenser 2a is disconnected from a refrigerating device with the refrigerant held up therein. After this operation, a stop valve 16 for an airtight container is left open. The disconnected condenser 24 is transported to a factory having a refrigerant recovery equipment and is connected to the refrigerant recovery equipment to thereby recover the refrigerant. The refrigerant can also be held up in the individual condensers 24 and, since the inlet and outlet side stop valves 13 and 14 are equipped, either of them is connected to recover the refrigerant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant compression type refrigerating apparatus, a refrigerant collecting method for the refrigerating apparatus, and a refrigerating apparatus remodeling method.

[0002]

2. Description of the Related Art In recent years, refrigerant refrigeration type refrigeration systems are economically and efficiently used at the time of disposal of products from the standpoint of not destroying the ozone layer and promoting global warming. There is also a need for products and refrigerant recovery methods that can be safely recovered. Further, there is a demand for an economical and efficient refrigeration system remodeling method suitable for the use environment.

As a typical example of the conventional refrigerant compression type refrigerating apparatus, the equipment listed in the catalog "hermetic type condensing unit" issued by Matsushita Electric Industrial Co., Ltd. in April 1992, and those by Matsushita Electric Industrial Co., Ltd. There was a built-in commercial refrigerator that combined with the equipment listed in the "Cooling Coil" catalog issued in September 1992.

The conventional refrigeration system will be described below with reference to the drawings. FIG. 9 is a refrigeration cycle diagram of a conventional refrigeration system.

In FIG. 9, 1 is a compressor, 2 is a condenser,
3 is a condenser blower, 4 is a throttle device, 5 is an evaporator, 6 is an evaporator blower, and a high-pressure stop valve 7 is provided between the condenser 2 and the throttle device 4, and an evaporator 5 is provided between the compressor 1 and the compressor 1. Each low pressure side stop valve 8 is equipped.

Compressor 1, condenser 2, condenser blower 3,
By combining a device called a condensing unit 9 composed of a high pressure side stop valve 7 and a low pressure side stop valve 8, a device called a cooling coil composed of an evaporator 5 and an evaporator blower 6, and a throttle device 4. It is usually used. The part surrounded by the broken line in FIG. 9 indicates the condensing unit 9.

The expansion device 4, the evaporator 5, and the evaporator blower 6
Is installed in the refrigerator. The high pressure side stop valve 7 and the low pressure side stop valve 8 are normally evacuated in the refrigeration cycle and filled with refrigerant.
A service port 10 for carrying out collection and the like is provided.
Both the high pressure side stop valve 7 and the low pressure side stop valve 8 are normally open. A refrigerant is enclosed in the refrigeration cycle.

The operation of the refrigerating apparatus having the above structure will be described below. During operation, the compressor 1, the blower 3 for the condenser, and the blower 6 for the evaporator operate. When the compressor 1 operates, the refrigerant is compressed and becomes high-temperature, high-pressure refrigerant gas and is supplied to the condenser 2. On the other hand, the operation of the condenser blower 3 causes air to flow to the outside of the condenser 2. When air passes through the outside of the condenser 2, the refrigerant inside the condenser 2 releases heat to condense and liquefy, and when leaving the condenser 2, it becomes a low-temperature, high-pressure refrigerant liquid. The low-temperature high-pressure refrigerant liquid is decompressed by the expansion device 4 and supplied into the evaporator 5.

On the outside of the evaporator 5, air is flowing into the interior by the operation of the evaporator blower 6. The refrigerant in the evaporator 5 exchanges heat with the air in the refrigerator to evaporate, and removes latent heat of vaporization from the inside of the refrigerator, so that the inside of the refrigerator is cooled. The refrigeration cycle in which the evaporated low-temperature low-pressure refrigerant gas is compressed again by the compressor 1 to become high-temperature high-pressure refrigerant gas and supplied to the condenser 3 is repeated.

Refrigerant recovery when the conventional refrigerating apparatus is disposed of will be described below. First, the high-pressure stop valve 7 is closed during the operation of the refrigeration system, and the refrigerant in the evaporator 5 is compressed by the compressor 1 and retained in the condenser 2. After that, the low-pressure stop valve 8 is closed to disconnect the connection to the expansion device 4 and the connection to return from the evaporator 5, and the condensing unit 9 in which the refrigerant has accumulated is transported to a factory having a refrigerant recovery facility, where the high pressure is applied. Refrigerant is recovered by connecting the service port 10 attached to the side stop valve 7 and the low pressure side stop valve 8 to the refrigerant recovery facility.

[0011]

When the refrigerant of the conventional refrigerating apparatus is to be recovered, the condensing unit 9 in which the refrigerant has accumulated (a compact one having a width of 50 cm and a depth of 60) is used.
cm × height 20 cm, mass 20 kg) must be transported to a factory equipped with a refrigerant recovery facility, but since it exceeds the range that can be carried by one person in terms of mass, the condensing unit 9 for recovering the refrigerant must be used. There was a problem in transportation.

When the condensing unit 9 is connected to the refrigerant recovery device to recover the refrigerant, the refrigerant is usually dissolved in the refrigerating machine oil in the compressor 1. A long recovery time of 1 hour was required.

Further, since the condenser 2 has a condensing capacity which varies depending on the usage environment, it should be originally selected in combination with the compressor 1 so as to match the usage environment. Since only the ones available are available, for example, sometimes the required environment cannot be secured when the environment is severe. In order to deal with such a case, the environment for normal use is improved or the refrigerating apparatus itself is replaced with another one, but it is not necessarily a good structure economically and efficiently.

The present invention solves the conventional problems, and an object of the present invention is to provide a refrigeration system capable of economically and efficiently recovering a refrigerant.

Another object of the present invention is to provide a refrigerating apparatus refrigerant recovery method that is economically and efficiently excellent.

Still another object of the present invention is to provide an economical and efficient refrigerating apparatus remodeling method suitable for a use environment.

[0017]

In order to achieve this object, a refrigerating apparatus of the present invention is provided with a condenser, an inlet stop valve provided in an inlet pipe of the condenser, and an outlet pipe of the condenser. An outlet-side stop valve and a closed container that is in communication between the inlet pipe and the outlet pipe via a closed-valve stop valve are provided.

The pressure in the condenser, the inlet stop valve provided in the inlet pipe of the condenser, the outlet stop valve provided in the outlet pipe of the condenser, and the pressure inside the condenser exceed a predetermined value. And a hermetically sealed container connected between the inlet pipe and the outlet pipe via a rupture plate that bursts.

The pressure inside the condenser, the inlet stop valve provided at the inlet pipe of the condenser, the outlet stop valve provided at the outlet pipe of the condenser, exceeds a predetermined value. And a closed container that is in communication between the inlet pipe and the outlet pipe via a relief valve that opens.

Further, between the condenser, the inlet stop valve provided on the inlet pipe of the condenser, the outlet stop valve provided on the outlet pipe of the condenser, and between the inlet pipe and the outlet pipe. A rupture tube that is provided in series and ruptures when the pressure inside the condenser exceeds a predetermined value, and a closed container that covers the rupture tube.

A condenser, an inlet stop valve provided on the inlet pipe of the condenser, an outlet stop valve provided on the outlet pipe of the condenser, and between the inlet pipe and the outlet pipe. There is provided a variable capacity closed container which communicates with the condenser and increases its volume when the pressure in the condenser exceeds a predetermined value.

Further, the inlet pipe is provided via a condenser, an inlet stop valve provided in the inlet pipe of the condenser, an outlet stop valve provided in the outlet pipe of the condenser, and a stop valve for a closed container. And a closed container in communication with the outlet pipe, an abnormal pressure detection means for detecting an abnormal pressure in the condenser, and the closed container stop valve when the abnormal pressure detection means detects an abnormal pressure And a stop valve control means for opening.

Further, the refrigerant recovery method of the refrigerating apparatus of the present invention operates the compressor in the refrigerating apparatus having the inlet side stop valve in the inlet pipe of the condenser and the outlet side stop valve in the outlet pipe of the condenser. , Closing the outlet side stop valve, closing the inlet side stop valve to allow the refrigerant to stay in the condenser, and a circuit from the inlet side stop valve to the compressor and from the outlet side stop valve to the expansion device. The circuits are separated, and the separated condensers are connected to a refrigerant recovery device to recover the refrigerant.

Further, according to the refrigerating apparatus remodeling method of the present invention, the operation of the compressor is stopped in the refrigerating apparatus having the inlet side stop valve in the inlet pipe of the condenser and the outlet side stop valve in the outlet pipe of the condenser. Closing the inlet side stop valve and the outlet side stop valve, disconnecting the circuit from the inlet side stop valve to the compressor and the circuit from the outlet side stop valve to the expansion device to separate the condenser from the refrigeration system. Remove, prepare a new condenser containing refrigerant and connect the circuit from the stop valve on the inlet side to the compressor and the circuit from the stop valve on the outlet side to the expansion device to the refrigeration system, respectively, The operation is performed to adjust the amount of refrigerant charged.

[0025]

In the refrigeration system of the present invention, the refrigerant of the refrigeration system is retained in the condenser by the inlet stop valve provided in the inlet pipe of the condenser and the outlet stop valve provided in the outlet pipe of the condenser. be able to. In addition, the refrigerant can be recovered by transporting the condenser separately from the refrigerating device while the refrigerant is retained and connecting it to the refrigerant recovery device.

Since the condenser separated from the refrigerating apparatus communicates with the closed container via the closed container stop valve, the refrigerant in the condenser is closed by opening the closed container stop valve immediately after disconnection. It is possible to prevent the rupture of the condenser and the outflow of the refrigerant during transportation or storage by flowing into the container so that the inside of the condenser is not full. Further, the condenser has an inlet side stop valve provided in the inlet pipe and an outlet side stop valve provided in the outlet pipe,
Easy to replace with another condenser.

Further, since the condenser separated from the refrigerating apparatus communicates with the closed container through the rupture plate which bursts when the pressure in the condenser exceeds a predetermined value, the refrigerant should be filled in the condenser. Even if the internal pressure rises and the internal pressure rises abnormally, the rupture plate ruptures at the specified pressure, the refrigerant flows into the closed container, and the condenser does not fill up.Therefore, the rupture of the condenser and the outflow of refrigerant during transportation or storage. Can be avoided in advance.

Further, since the condenser separated from the refrigeration system communicates with the closed container through the relief valve that opens when the pressure inside the condenser exceeds a predetermined value, the condenser should be filled with the refrigerant. Even if it stays and the internal pressure rises abnormally, the relief valve will operate at the specified pressure and the refrigerant will flow into the closed container, and the condenser will not fill up.Therefore, the rupture of the condenser and the outflow of refrigerant during transportation or storage may occur. You can avoid it.

Further, the condenser separated from the refrigerating apparatus is connected in series with a burst tube in which the pressure inside the condenser bursts, and the outside of the burst tube is covered with a closed container. Even if the refrigerant stays full in the condenser and the internal pressure rises abnormally, only the burst tube bursts at the specified pressure, the refrigerant flows into the closed container, and the condenser does not fill up. It is possible to prevent the condenser from bursting and the refrigerant from flowing out during storage.

Further, since the condenser separated from the refrigerating apparatus is in communication with a variable capacity closed container that increases in volume when the pressure inside the condenser exceeds a predetermined value, by any chance the refrigerant is full in the condenser. Even if it stays and the internal pressure rises abnormally, the volume of the variable-capacity closed container increases at a certain pressure, the refrigerant flows into the variable-capacity closed container, and the condenser does not fill up. Explosion and refrigerant outflow can be avoided.

Further, the condenser separated from the refrigerating apparatus communicates with the closed container via the stop valve for the closed container, and the abnormal pressure detecting means for detecting the abnormal pressure in the condenser and the abnormal pressure detecting means. Is equipped with a stop valve control means that opens the stop valve for the closed container when an abnormal pressure is detected, so even if the refrigerant stays full in the condenser and the internal pressure rises abnormally, the abnormal pressure Since the detection means detects this and the stop valve control means opens the stop valve for the closed container, the refrigerant flows into the closed container and the condenser is not full, and the rupture of the condenser and the outflow of the refrigerant during transportation or storage occur. It can be avoided in advance.

Further, the refrigerant recovery method of the refrigeration system of the present invention uses the inlet stop valve provided in the inlet pipe of the condenser and the outlet stop valve provided in the outlet pipe of the condenser to remove the refrigerant in the refrigeration system. Refrigerant can be recovered by allowing the refrigerant to stay in the condenser, separating the condenser from the refrigeration apparatus and transporting it while the refrigerant remains in the condenser, and connecting it to the refrigerant recovery device.

Further, in the refrigerating apparatus remodeling method of the present invention, the condenser can be easily attached and detached by the inlet stop valve provided in the inlet pipe of the condenser and the outlet stop valve provided in the outlet pipe of the condenser. Therefore, it can be easily replaced with another condenser.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a refrigerating apparatus according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a refrigerating cycle diagram of the refrigerating apparatus according to the first embodiment of the present invention. In FIG. 1, 2a is a condenser, and 11 and 12 are an inlet pipe and an outlet pipe of the condenser 2a, respectively. Reference numeral 13 is an inlet side stop valve provided in the inlet pipe 11, and 14 is an outlet side stop valve provided in the outlet pipe 12.

Reference numeral 15 is a closed container, and 16 is a stop valve for the closed container. The closed container 15 is connected between the inlet pipe 11 and the outlet pipe 12 via the stop valve 16 for the closed container. Therefore, the condenser 2a is connected to the closed container 1 via the stop valve 16 for the closed container.
It communicates with 5. The high pressure side stop valve 7 and the low pressure side stop valve 8 are normally open. Both the inlet side stop valve 13 and the outlet side stop valve 14 are normally open.

The stop valve 16 for the closed container is a valve which is operated only when the refrigerant is collected, and is normally closed. The closed container 15 is in a vacuum state or filled with a refrigerant gas. The expansion device 4, the evaporator 5, and the evaporator blower 6 are installed inside the refrigerator. Some refrigerating apparatuses do not include the condenser blower 3 and the evaporator blower 6. A refrigerant is enclosed in the refrigeration cycle.

The operation of the refrigerating apparatus configured as described above will be described. However, the basic principle of cooling is the same as that of the conventional example, and the description thereof is omitted.

Next, the method of circulating the refrigerant will be described. When the compressor 1 is operated and the stop valve 14 on the outlet side is closed, the refrigerant in the evaporator 5 is sucked into the compressor 1, compressed, and stays in the condenser 2a. Next, the inlet side stop valve 13 is closed and the connection from the inlet side stop valve 13 to the compressor 1 and the outlet side stop valve 14 are connected.
When both of the connections from the expansion device 4 to the expansion device 4 are disconnected, the condenser 2a is disconnected from the refrigeration device in the state where the refrigerant remains. After the above operation, the stop valve 16 for the closed container is left open. The separated condenser 2a can be transported to a factory having a refrigerant recovery facility and connected to the refrigerant recovery facility to recover the refrigerant.

Next, the merit in transportation will be described.
In this embodiment, only the condenser 2a in which the refrigerant is accumulated is transported to a factory having a refrigerant recovery facility, and the refrigerant is recovered there. The condenser 2a is large and has a width of 50 cm, a depth of 15 cm, a height of 40 cm, and a mass of about 5 kg, so that it can be carried by one person and has a mass of about 80 kg, such as a refrigerant recovery device, a refrigerator or a built-in refrigerator. Alternatively, it is much more economical and efficient than carrying a condensing unit with a mass of about 20 kg.

Next, the structural merit will be described.
According to this embodiment, the refrigerant can be accumulated in the condenser 2a. Since the condenser 2a is equipped with the inlet stop valve 13 and the outlet stop valve 14, either one of the two may be connected to the refrigerant recovery facility to recover the refrigerant. Further, since the refrigerant inside the condenser 2a contains only a small amount of refrigerating machine oil, the time for recovering the refrigerant is usually short at 5 to 10 minutes, which is far more economical and efficient in structure than the conventional refrigerating apparatus. Target.

Next, safety advantages will be described.
A safety problem in the refrigerant recovery method of the present embodiment is that the condenser 2a is disconnected from the refrigerating device and then ruptured by internal pressure during transportation or storage until it is connected to the refrigerant recovery facility and the refrigerant is recovered. Is a response to. If the condenser ruptures, there is a risk of damaging the human body, destruction of the ozone layer, and promotion of global warming, which is unsafe. In order to solve this problem, the closed container 15 and the stop valve 16 for the closed container are provided in this embodiment.

When the amount of the refrigerant enclosed in the refrigeration cycle is smaller than the internal volume of the condenser 2a, the refrigerant is the condenser 2a.
It stays in a in a two-phase state of liquid and gas. In such a state, the condenser 2a is designed with a pressure resistance that can sufficiently withstand the rise in the ambient temperature, so there is no risk of rupture.

When the amount of the refrigerant enclosed in the refrigeration cycle is large relative to the internal volume of the condenser 2a, the refrigerant may stay in the condenser 2a in a full liquid state, and the stopper for the closed container is closed. When the ambient temperature rises with the valve 16 kept closed, a pressure higher than the pressure resistance of the condenser 2a is generated due to liquid expansion,
There is a risk of the condenser 2a bursting.

However, as described in the above operation, after disconnecting the condenser 2a from the refrigerating apparatus, the stop valve 1 for the closed container 1
When 6 is opened, the closed container 15 is in communication with the condenser 2a through the stop valve 16 for the closed container, and when the valve is closed, the inside is in a vacuum state or the refrigerant gas is filled. A two-phase state of liquid and gas is always ensured in the condenser 2a. In such a state, there is no danger of the condenser 2a bursting even if the ambient temperature rises, and there is no concern that the refrigerant will flow out due to the bursting. , Safe.

Next, the merits of remodeling will be described.
When the condenser capacity of the condenser is found to be insufficient in the usage environment for the first time after actual use, the condenser 2a
Since the inlet pipe 11 is equipped with the inlet side stop valve 13 and the outlet pipe 12 is equipped with the outlet side stop valve 14, replacement with another condenser can be performed easily and quickly. First, in the operation of removing the condenser 2a, the inlet side stop valve 13 and the outlet side stop valve 14 are closed to connect the compressor 1 to the inlet side stop valve 13 and the connection from the expansion device 4 to the outlet side stop valve 14. Just separate the parts. Next, another condenser in which the refrigerant is sealed may be attached in the reverse operation of the above. According to this method, operations such as welding, evacuation and refilling of the refrigerant are not required. Also,
Much more economical and efficient than replacing the entire refrigeration system.

As described above, the refrigerating apparatus of this embodiment includes the inlet stop valve 13 provided in the inlet pipe 11 of the condenser 2a and the outlet stop valve 14 provided in the outlet pipe 12 of the condenser 2a. The refrigerant of the refrigeration system can be retained in the condenser 2a. Further, the refrigerant can be economically and efficiently recovered by transporting the condenser 2a while separating the refrigerant from the refrigerating device while retaining the refrigerant and connecting it to the refrigerant recovery device.

The condenser 2a separated from the refrigeration system
Since it communicates with the closed container 15 through the closed container stop valve 16, opening the closed container stop valve 16 immediately after disconnection prevents the refrigerant from staying full in the condenser 2a and transports it. It is safe to avoid rupture of the condenser 2a and outflow of the refrigerant during storage or storage. Further, the condenser 2a is easily replaced by another condenser because the condenser 2a can be easily attached and detached by the inlet stop valve 13 provided in the inlet pipe 11 and the outlet stop valve 14 provided in the outlet pipe 12. It contributes to the modification of the refrigeration system that suits the usage environment.

Next, a second embodiment of the refrigerating apparatus according to the present invention will be described with reference to the drawings. The first
The same configurations as those of the embodiment are given the same reference numerals and detailed description thereof will be omitted.

FIG. 2 is a refrigerating cycle diagram of the refrigerating apparatus according to the second embodiment of the present invention. In FIG. 2, 2b is a condenser, 17 is a rupture plate that ruptures when the pressure in the condenser 2b exceeds a predetermined value, and the closed container 15 is provided between the inlet pipe 11 and the outlet pipe 12 via the rupture plate 17. Is in communication with. Therefore, the condenser 2 b communicates with the closed container 15 via the rupture plate 17.

Next, the method of circulating the refrigerant will be described. When the compressor 1 is operated and the stop valve 14 on the outlet side is closed, the refrigerant in the evaporator 5 is sucked into the compressor 1, compressed, and stays in the condenser 2b. Next, the inlet side stop valve 13 is closed and the connection from the inlet side stop valve 13 to the compressor 1 and the outlet side stop valve 14 are connected.
When both of the connections from the expansion device 4 to the expansion device 4 are disconnected, the condenser 2b is disconnected from the refrigeration device in the state in which the refrigerant remains. Refrigerant can be recovered by transporting the separated condenser 2b to a factory having a refrigerant recovery facility and connecting it to the refrigerant recovery facility.

Next, the merit in transportation will be described.
Since the content thereof is the same as the content described in the first embodiment, detailed description thereof will be omitted, but in this embodiment, at the time of refrigerant recovery, only the condenser 2b in which the refrigerant is retained may be transported. It is much more economical and efficient than transporting the product itself as in the past.

Next, the structural merit will be described.
Since the contents are the same as the contents described in the first embodiment, detailed description thereof will be omitted, but in this embodiment, the inlet pipe 11 of the condenser 2b is provided with the inlet side stop valve 13 and the outlet pipe 12. Since it is equipped with the outlet stop valve 14, it can be easily connected to the refrigerant recovery device and the refrigerant recovery time can be shortened, which is far more economical and efficient than the conventional products.

Next, safety advantages will be described.
A safety problem in the refrigerant recovery method of the present embodiment is that the condenser 2b is disconnected from the refrigerating device and then ruptured by internal pressure during transportation or storage until it is connected to the refrigerant recovery facility and the refrigerant is recovered. Is a response to. If the condenser 2b bursts, it may damage the human body, destroy the ozone layer, and promote global warming, which is unsafe.
In order to solve this problem, the closed container 15 and the rupture plate 17 are provided in this embodiment.

When the amount of the refrigerant enclosed in the refrigeration cycle is smaller than the inner volume of the condenser 2b, the refrigerant is the condenser 2b.
It stays in b in a two-phase state of liquid and gas. In such a state, the condenser 2b is designed with a pressure-resistant strength that can sufficiently endure even if the ambient temperature rises, so there is no danger of bursting.

When the amount of the refrigerant enclosed in the refrigeration cycle is large relative to the internal volume of the condenser 2b, the refrigerant may stay in the condenser 2b in a full liquid state. If the ambient temperature rises without the rupture plate 17, the liquid expansion causes a pressure higher than the pressure resistance of the condenser 2b.
There is a risk of the condenser 2b bursting.

However, as described in the above configuration, the condenser 2b has a rupture plate 1 which ruptures when the internal pressure thereof exceeds a predetermined value.
Since it is communicated with the closed container 15 via 7, the rupture plate 17 ruptures and the refrigerant flows into the closed container 15 in case of emergency. Before the bursting plate 17 bursts, the closed container 15 is in a vacuum state or filled with a refrigerant gas, so that after the bursting, the condenser 2b always has a two-phase state of liquid and gas. In the state, even if the ambient temperature rises, the condenser 2
There is no danger that b itself will burst, and there is no concern that the refrigerant will flow out due to bursting, so it is safe.

Although the rupture plate 17 is a separate component from the closed container 15 in this embodiment, the closed container 15 containing the rupturable plate 17 may be a single component.

Next, the merit in the modification will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet side stop valve 1 is installed in the inlet pipe 11 of the condenser 2b.
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, when the condenser 2b has insufficient condensation capacity, it can be replaced with another condenser easily and quickly. It is economical and efficient.

As described above, the refrigerating apparatus of this embodiment includes the inlet side stop valve 13 provided in the inlet pipe 11 of the condenser 2b and the outlet side stop valve 14 provided in the outlet pipe 12 of the condenser 2b. The refrigerant of the refrigeration system can be retained in the condenser 2b. Further, the refrigerant can be economically and efficiently recovered by transporting the condenser 2b separately from the refrigerating device while the refrigerant is retained and connecting it to the refrigerant recovery device.

The condenser 2b separated from the refrigeration system
Communicates with the closed container 15 through a rupture plate 17 that ruptures when the internal pressure exceeds a predetermined value. In the unlikely event, the rupture plate 17 ruptures and the refrigerant stays full in the condenser 2b. Therefore, it is safe to prevent the rupture of the condenser 2b itself and the outflow of the refrigerant during transportation or storage while preventing the occurrence of the above. In addition, the inlet side stop valve 13 provided in the inlet pipe 11 of the condenser 2b and the outlet side stop valve 14 provided in the outlet pipe 12 allow the condenser 2b
Since it is easy to attach and remove, you can easily replace it with another condenser,
Contributes to the modification of refrigeration equipment to suit the usage environment.

Next, a third embodiment of the refrigerating apparatus according to the present invention will be described with reference to the drawings. The first
The same configurations as those of the embodiment are given the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a refrigerating cycle diagram of the refrigerating apparatus according to the third embodiment of the present invention. In FIG. 3, 2c is a condenser, 18 is a relief valve that opens when the pressure in the condenser 2c exceeds a predetermined value, and the closed container 15 is provided between the inlet pipe 11 and the outlet pipe 12 via the relief valve 18. It is in communication. Therefore, the condenser 2c communicates with the closed container 15 via the relief valve 18.

The operation of the refrigerating apparatus configured as described above will be described. However, the basic principle of cooling is the same as that of the conventional example, and the description thereof is omitted.

Next, the method of circulating the refrigerant will be described. When the compressor 1 is operated and the stop valve 14 on the outlet side is closed, the refrigerant in the evaporator 5 is sucked into the compressor 1, compressed, and stays in the condenser 2c. Next, the inlet side stop valve 13 is closed and the connection from the inlet side stop valve 13 to the compressor 1 and the outlet side stop valve 14 are connected.
When both of the connections from the expansion device 4 to the expansion device 4 are disconnected, the condenser 2c is disconnected from the refrigeration device in the state in which the refrigerant remains. The separated condenser 2c can be transported to a factory having a refrigerant recovery facility and connected to the refrigerant recovery facility to recover the refrigerant.

Next, the merit in transportation will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the condenser 2c in which the refrigerant is retained at the time of collecting the refrigerant
Only the goods need to be transported, which is far more economical and efficient than the conventional method of transporting the goods themselves.

Next, the structural merit will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet pipe 11 of the condenser 2c is connected to the inlet stop valve 1
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, it can be easily connected to the refrigerant recovery device and the refrigerant recovery time can be shortened, which is far more economical and efficient than conventional products. .

Next, safety advantages will be described.
A safety problem in the refrigerant recovery method of the present embodiment is that the condenser 2c is disconnected from the refrigerating device, then connected to the refrigerant recovery facility and ruptured by internal pressure during transportation or storage until the refrigerant is recovered. Is a response to. If the condenser 2c bursts, it may damage the human body, destroy the ozone layer, and promote global warming, which is unsafe.
In order to solve this problem, the closed container 15 and the relief valve 18 are provided in this embodiment.

When the amount of the refrigerant enclosed in the refrigeration cycle is smaller than the inner volume of the condenser 2c, the refrigerant is the condenser 2c.
It stays in c in a two-phase state of liquid and gas. In such a state, the condenser 2c is designed with a pressure resistance strength that can sufficiently withstand the rise in the ambient temperature, and therefore there is no danger of bursting.

When the amount of the refrigerant enclosed in the refrigeration cycle is large relative to the internal volume of the condenser 2c, the refrigerant may stay in the condenser 2c in a full liquid state. If the ambient temperature rises without the relief valve 18, the liquid expansion causes a pressure higher than the pressure resistance of the condenser 2c.
There is a risk of the condenser 2c bursting.

However, as described above, since the condenser 2c communicates with the closed container 15 via the relief valve 18 which opens when the internal pressure thereof exceeds a predetermined value, the relief valve 18 should be provided in case of emergency. Opens and the refrigerant flows into the closed container 15. The closed container 15 is in a vacuum state when the relief valve 18 is closed or because the refrigerant gas is filled therein. Therefore, the condenser 2c is opened when the valve is opened.
A two-phase state of liquid and gas is always ensured in the interior, and in such a state there is no danger of the condenser 2c rupturing even if the ambient temperature rises, and there is no concern that the refrigerant will flow out due to the rupture, which is safe. Is.

Next, the merits of modification will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet pipe 11 of the condenser 2c is connected to the inlet stop valve 1
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, when the condenser 2c has insufficient condensation capacity, it can be replaced with another condenser easily and quickly. It is economical and efficient.

As described above, the refrigerating apparatus of this embodiment includes the inlet stop valve 13 provided in the inlet pipe 11 of the condenser 2c and the outlet stop valve 14 provided in the outlet pipe 12 of the condenser 2c. The refrigerant of the refrigeration system can be retained in the condenser 2c. Further, the refrigerant can be economically and efficiently recovered by transporting the condenser 2c while separating the refrigerant from the refrigerating device while retaining the refrigerant and connecting it to the refrigerant recovery device.

The condenser 2c separated from the refrigeration system
Communicates with the closed container 15 via the relief valve 18 that opens when the internal pressure exceeds a predetermined value, so in the unlikely event that the relief valve 18 opens and the refrigerant is retained in the condenser 2c in a full liquid state. It is safe because it is possible to prevent the condenser 2c itself from bursting and the refrigerant from flowing out during transportation or storage. Also, the condenser 2c
The condenser 2c can be easily attached and detached by the inlet side stop valve 13 provided on the inlet pipe 11 and the outlet side stop valve 14 provided on the outlet pipe 12, so that the condenser 2c can be easily replaced with another condenser, which is suitable for the operating environment. Contributes to the modification of the refrigeration system that fits.

Next, a fourth embodiment of the refrigerating apparatus according to the present invention will be described with reference to the drawings. The first
The same configurations as those of the embodiment are given the same reference numerals and detailed description thereof will be omitted.

FIG. 4 is a refrigerating cycle diagram of the refrigerating apparatus according to the fourth embodiment of the present invention. In FIG. 4, 2d is a condenser, 19 is a closed container, and 20 is a burst tube that bursts when the pressure inside the condenser 2d exceeds a predetermined value. The burst tube 20 is connected in series between the inlet tube 11 and the outlet tube 12, and the outside thereof is covered with a closed container 19. Therefore condenser 2
d and the burst tube 20 communicate with each other. The outside of the rupture tube 20 and the inside of the closed container 19 are in a vacuum state or filled with a refrigerant gas.

The operation of the refrigerating apparatus configured as described above will be described. However, the basic principle of cooling is the same as that of the conventional example, and the description thereof is omitted.

Next, the method of circulating the refrigerant will be described. When the compressor 1 is operated and the stop valve 14 on the outlet side is closed, the refrigerant in the evaporator 5 is sucked into the compressor 1, compressed, and stays in the condenser 2d. Next, the inlet side stop valve 13 is closed and the connection from the inlet side stop valve 13 to the compressor 1 and the outlet side stop valve 14 are connected.
When both of the connections from the expansion device to the expansion device 4 are disconnected, the condenser 2d is disconnected from the refrigeration device in the state where the refrigerant is retained. The separated condenser 2d can be transported to a factory having a refrigerant recovery facility and connected to the refrigerant recovery facility to recover the refrigerant.

Next, the merit in transportation will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the condenser 2d in which the refrigerant is retained when the refrigerant is collected
Only the goods need to be transported, which is far more economical and efficient than the conventional transportation of the product itself.

Next, the structural merit will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet side stop valve 1 is attached to the inlet pipe 11 of the condenser 2d.
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, it can be easily connected to the refrigerant recovery device and the refrigerant recovery time can be shortened, which is far more economical and efficient than conventional products. .

Next, safety merits will be described.
A safety problem in the refrigerant recovery method of the present embodiment is that the condenser 2d is disconnected from the refrigerating device and then connected to the refrigerant recovery facility to explode due to internal pressure during transportation or storage until the refrigerant is recovered. Is a response to. If the condenser ruptures, there is a risk of damaging the human body, destruction of the ozone layer, and promotion of global warming, which is unsafe. In order to solve this problem, the closed container 19 and the burst tube 20 are equipped in this embodiment.

When the amount of the refrigerant enclosed in the refrigeration cycle is smaller than the internal volume of the condenser 2d, the refrigerant is the condenser 2
It stays in d in a two-phase state of liquid and gas. In such a state, the condenser 2d is designed with a pressure-resistant strength that can sufficiently endure even if the ambient temperature rises, so there is no danger of bursting.

When the amount of the refrigerant enclosed in the refrigeration cycle is large with respect to the internal volume of the condenser 2d, the refrigerant may stay in the condenser 2d in a liquid state. If the ambient temperature rises without the burst tube 20 installed, the liquid expansion causes a pressure higher than the pressure resistance of the condenser 2d.
There is a risk of the condenser 2d bursting.

However, as described in the above configuration, the condenser 2d is ruptured when the internal pressure exceeds a predetermined value.
The outside of the burst tube 20 is in communication with the closed container 1
Since it is covered with 9, the burst tube 20 bursts and the refrigerant flows into the closed container 19 in case of emergency. The inside of the closed vessel 19 outside the rupture tube 20 is in a vacuum state before the rupture of the rupture tube 20 or because the refrigerant gas is enclosed therein, the inside of the condenser 2d is always in a two-phase state of liquid and gas after the rupture. Is ensured, and in such a state, even if the ambient temperature rises, the condenser 2
d itself is safe, with no danger of bursting and no risk of refrigerant flowing out by bursting.

Next, the merits of modification will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet side stop valve 1 is attached to the inlet pipe 11 of the condenser 2d.
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, if the condenser 2d has insufficient condensation capacity, it can be replaced with another condenser easily and quickly. It is economical and efficient.

As described above, the refrigerating apparatus according to this embodiment includes the inlet stop valve 13 provided in the inlet pipe 11 of the condenser 2d and the outlet stop valve 14 provided in the outlet pipe 12 of the condenser 2d. The refrigerant of the refrigeration system can be retained in the condenser 2d. In addition, the refrigerant can be economically and efficiently recovered by transporting the condenser 2d separately from the refrigerating device while the refrigerant is retained and connecting it to the refrigerant recovery device.

The condenser 2 separated from the refrigeration system
Since d is connected in series with the burst tube 20 in which the pressure in the condenser 2d exceeds a predetermined value and bursts, and the outside of the burst tube 20 is covered with a closed container 19, the refrigerant is condensed in the condenser 2d. Even if the internal pressure rises due to full liquid retention, only the rupture pipe 20 ruptures at a predetermined pressure, and the rupture of the condenser 2d itself and the outflow of the refrigerant during transportation or storage can be avoided, which is safe. . Further, the condenser 2d can be easily replaced with another condenser because the condenser 2d can be easily attached and detached by the inlet side stop valve 13 provided in the inlet pipe 11 and the outlet side stop valve 14 provided in the outlet pipe 12. It contributes to the modification of the refrigeration system that suits the usage environment.

Next, a fifth embodiment of the refrigerating apparatus according to the present invention will be described with reference to the drawings. The first
The same configurations as those of the embodiment are given the same reference numerals and detailed description thereof will be omitted.

FIG. 5 is a refrigerating cycle diagram of the refrigerating apparatus according to the fifth embodiment of the present invention. In FIG. 5, 2e is a condenser, and 21 is a variable-capacity closed container that increases in volume when the pressure inside the condenser 2e exceeds a predetermined value, and is connected between the inlet pipe 11 and the outlet pipe 12. Therefore, the condenser 2e communicates with the variable capacity closed container 21.

The operation of the refrigerating apparatus configured as described above will be described. However, the basic principle of cooling is the same as that of the conventional example, and the description thereof is omitted.

Next, the method of circulating the refrigerant will be described. When the compressor 1 is operated and the stop valve 14 on the outlet side is closed, the refrigerant in the evaporator 5 is sucked into the compressor 1, compressed, and stays in the condenser 2e. Next, the inlet side stop valve 13 is closed and the connection from the inlet side stop valve 13 to the compressor 1 and the outlet side stop valve 14 are connected.
When both of the connections from the expansion device 4 to the expansion device 4 are disconnected, the condenser 2e is disconnected from the refrigeration device in the state where the refrigerant remains. The separated condenser 2e can be transported to a factory having a refrigerant recovery facility and connected to the refrigerant recovery facility to recover the refrigerant.

Next, the merit in transportation will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the condenser 2e in which the refrigerant is retained at the time of collecting the refrigerant
Only the goods need to be transported, which is far more economical and efficient than the conventional transportation of the product itself.

Next, the structural merit will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet pipe 11 of the condenser 2e is connected to the inlet stop valve 1
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, it can be easily connected to the refrigerant recovery device and the refrigerant recovery time can be shortened, which is far more economical and efficient than conventional products. .

Next, safety advantages will be described.
A safety issue in the refrigerant recovery method of the present embodiment is that the condenser 2e is disconnected from the refrigerating device and then ruptured by internal pressure during transportation or storage until it is connected to the refrigerant recovery facility and the refrigerant is recovered. Is a response to. If the condenser ruptures, there is a risk of damaging the human body, destruction of the ozone layer, and promotion of global warming, which is unsafe. In order to solve this problem, in this embodiment, the variable volume closed container 2 is used.
Equipped with 1.

When the amount of the refrigerant enclosed in the refrigeration cycle is smaller than the internal volume of the condenser 2e, the refrigerant is the condenser 2e.
It stays in e in the state of two phases of liquid and gas. In such a state, the condenser 2e is designed with a pressure-resistant strength that can sufficiently withstand the rise in the ambient temperature, so there is no risk of rupture.

When the amount of the refrigerant enclosed in the refrigeration cycle is large relative to the internal volume of the condenser 2e, the refrigerant may stay in the condenser 2e in a full liquid state. If the ambient temperature rises without the variable-capacity closed container 21, liquid expansion causes a pressure higher than the pressure resistance of the condenser 2e, which may cause the condenser 2e to burst.

However, as described in the above configuration, the condenser 2e communicates with the variable capacity closed container 21 that increases in volume when the internal pressure exceeds a predetermined value. The volume of 21 becomes large, and in such a state, even if the ambient temperature rises, the condenser 2e itself does not have a risk of bursting, and there is no concern that the refrigerant will flow out due to the bursting, which is safe.

Next, the merits of remodeling will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet pipe 11 of the condenser 2e is connected to the inlet stop valve 1
3. Since the outlet pipe 12 is equipped with the outlet side stop valve 14, when the condenser 2e has insufficient condensation capacity, it can be replaced with another condenser easily and quickly. It is economical and efficient.

As described above, the refrigerating apparatus of this embodiment includes the inlet stop valve 13 provided in the inlet pipe 11 of the condenser 2e and the outlet stop valve 14 provided in the outlet pipe 12 of the condenser 2e. The refrigerant of the refrigeration system can be retained in the condenser 2e. Further, the refrigerant can be economically and efficiently recovered by separating the condenser 2e from the refrigerating apparatus and transporting the refrigerant while staying in the refrigerant and connecting it to the refrigerant recovery apparatus.

The condenser 2e separated from the refrigeration system
Is equipped with a variable-capacity sealed container 21 that increases in volume when its internal pressure exceeds a predetermined value, so in the unlikely event that the variable-capacity sealed container 21 has a large volume, the condenser is being transported or stored. It is safe because the burst of 2e itself and the outflow of the refrigerant can be avoided. Further, the condenser 2e is easily replaced by another condenser because the condenser 2e can be easily attached and detached by the inlet side stop valve 13 provided in the inlet pipe 11 and the outlet side stop valve 14 provided in the outlet pipe 12. It contributes to the modification of the refrigeration system that suits the usage environment.

Next, a sixth embodiment of the refrigerating apparatus according to the present invention will be described with reference to the drawings. The first
The same configurations as those of the embodiment are given the same reference numerals and detailed description thereof will be omitted.

FIG. 6 is a refrigerating cycle diagram of the refrigerating apparatus according to the sixth embodiment of the present invention. In FIG. 6, 2f is a condenser, 22 is a stop valve for a closed container, and the closed container 15 is an inlet pipe 11 and an outlet pipe 12 via a stop valve 22 for a closed container.
It communicates with. Therefore, the condenser 2f communicates with the closed container 15 through the closed valve 22 for the closed container. 23
Is an abnormal pressure detector as an abnormal pressure detecting means. The abnormal pressure detector 23 includes a pressure detector 24 and an abnormal pressure output unit 2.
The pressure detector 24 is in communication with the condenser 2f. Further, the stop valve 22 for the closed container is equipped with a stop valve controller 26 as a stop valve control means for opening the stop valve 22 for the closed container upon receiving an abnormal pressure output signal sent from the abnormal pressure output unit 25. . The stop valve controller 26 includes an abnormal pressure input unit 27 that receives an abnormal pressure output signal and a stop valve drive unit 28 that opens the stop valve 22 for the closed container. The abnormal pressure detector 23 and the stop valve controller 26 are electrically operated.

The operation of the refrigerating apparatus configured as described above will be described. However, the basic principle of cooling is the same as that of the conventional example, and the description thereof is omitted.

Next, the refrigerant recovery method will be described. When the compressor 1 is operated and the outlet stop valve 14 is closed, the evaporator 5
The refrigerant in the compressor 1 is sucked into the compressor 1 and compressed into the condenser 2f.
Stay inside. Next, the inlet side stop valve 13 is closed and the connection from the inlet side stop valve 13 to the compressor 1 and the outlet side stop valve 1
When both of the connections from 4 to the expansion device 4 are disconnected, the condenser 2f is disconnected from the refrigeration device in the state in which the refrigerant remains. The separated condenser 2f can be transported to a factory having a refrigerant recovery facility and connected to the refrigerant recovery facility to recover the refrigerant.

Next, the merit in transportation will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the condenser 2f in which the refrigerant is retained during the refrigerant recovery
Only the goods need to be transported, which is far more economical and efficient than the conventional transportation of the product itself.

Next, the structural merit will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet pipe 11 of the condenser 2f is connected to the inlet stop valve 1
3. Since the outlet pipe 12 is equipped with the outlet stop valve 14, it can be easily connected to the refrigerant recovery device and the refrigerant recovery time can be shortened, which is far more economical and efficient than conventional products. .

Next, safety merits will be described.
A safety problem in the refrigerant recovery method of the present embodiment is that the condenser 2f is disconnected from the refrigerating device and then ruptured by internal pressure during transportation or storage until it is connected to the refrigerant recovery facility and the refrigerant is recovered. Is a response to. If the condenser ruptures, there is a risk of damaging the human body, destruction of the ozone layer, and promotion of global warming, which is unsafe. In order to solve this problem, this embodiment is equipped with a closed container 15, a closed container stop valve 22, an abnormal pressure detector 23, and a stop valve controller 26.

When the amount of the refrigerant enclosed in the refrigeration cycle is smaller than the internal volume of the condenser 2f, the refrigerant is the condenser 2f.
It stays in f in a two-phase state of liquid and gas. In such a state, since the condenser 2f is designed with a pressure resistance strength that can sufficiently withstand the rise in ambient temperature, there is no risk of explosion.

When the amount of the refrigerant enclosed in the refrigeration cycle is larger than the internal volume of the condenser 2f, the refrigerant may stay in the condenser 2f in a full liquid state. If the closed container 15, the stop valve 22 for the closed container, and the abnormal pressure detector 2
3 and when the ambient temperature rises in a state where the stop valve controller 26 is not installed, liquid expansion causes a pressure equal to or higher than the pressure resistance strength of the condenser 2f, which may cause the condenser 2f to burst.

However, as described in the above configuration, since the condenser 2f and the pressure detecting portion 24 of the abnormal pressure detector 23 are communicated with each other, the pressure detecting portion 24 will be activated when the pressure in the condenser 2f rises abnormally. Upon detecting this, the abnormal pressure output unit 25 outputs an abnormal pressure output signal to the stop valve controller 26. The abnormal pressure input unit 27 of the stop valve controller 26 receives this output signal, and the stop valve drive unit 28 opens the stop valve 22 for the closed container. Therefore, in the unlikely event, the refrigerant flows into the closed container 15.

A stop valve 22 for the closed container is provided in the closed container 15.
Since the valve was opened in a vacuum state or the refrigerant gas was enclosed, the condenser 2f always maintained a two-phase state of liquid and gas after the valve was opened. In such a state, the ambient temperature rises. However, there is no danger that the condenser 2f itself will burst, and there is no concern that the refrigerant will flow out due to the burst, which is safe.

Although the means for detecting abnormality is "pressure" in this embodiment, the means for detecting abnormality may be "temperature". Therefore, 23 may be replaced with an abnormal temperature detector serving as an abnormal temperature detecting unit, 24 is a temperature detecting unit, 25 is an abnormal temperature output unit, and 27 is an abnormal temperature input unit.

Although the abnormal pressure detector 23 and the stop valve controller 26 are electrically operated, they may be mechanically operated. Alternatively, it may be operated by a combination of electricity and machinery.

Further, although the abnormal pressure output section 25 of the abnormal pressure detector 23 and the stop valve control device 26 are provided, the pressure detecting section or the temperature detecting section 24 and the closed container stopper which do not require the above parts. The valve 22 may be replaced by a single integrated component.

Next, the merits of modification will be described.
Since the contents thereof are the same as those described in the first embodiment of the present invention, detailed description thereof will be omitted.
In this embodiment, the inlet pipe 11 of the condenser 2f is connected to the inlet stop valve 1
3. Since the outlet pipe 12 is equipped with the outlet side stop valve 14, when the condenser 2f has insufficient condensation capacity, it can be replaced easily with another condenser, which is much faster than the conventional product. It is economical and efficient.

As described above, the refrigerating apparatus of this embodiment includes the inlet side stop valve 13 provided in the inlet pipe 11 of the condenser 2f and the outlet side stop valve 14 provided in the outlet pipe 12 of the condenser 2f. The refrigerant of the refrigeration system can be retained in the condenser 2f. Further, the refrigerant can be economically and efficiently recovered by transporting the condenser 2f while separating the refrigerant from the refrigeration apparatus while connecting the refrigerant to the refrigerant recovery apparatus.

The condenser 2f separated from the refrigeration system
Is an abnormal pressure detecting device 23 which is an abnormal pressure detecting means for detecting an abnormal increase in pressure, and an abnormal pressure detecting device 2
Since it is equipped with a stop valve control device 26 which is a stop valve control means for opening the stop valve 22 for the closed container upon receiving the output signal of No. 3, the stop valve 22 for the closed container is opened in the case of emergency and the refrigerant is It is safe to prevent the condenser 2f from staying full of liquid and prevent the condenser 2f itself from rupturing and flowing out of the refrigerant during transportation or storage. Further, the condenser 2f can be easily replaced by another condenser because the condenser 2f can be easily attached and detached by the inlet side stop valve 13 provided in the inlet pipe 11 and the outlet side stop valve 14 provided in the outlet pipe 12. It contributes to the modification of the refrigeration system that suits the usage environment.

Next, an embodiment of the refrigerant recovery method for the refrigeration system according to the present invention will be described with reference to the flowchart in FIG.

First, the compressor is operated (step 1).
Next, the outlet side stop valve of the condenser is closed (step 2).
Next, the stop valve on the inlet side of the condenser is closed to allow the refrigerant to stay in the condenser (step 3). Next, the circuit from the inlet side stop valve to the compressor and the circuit from the outlet side stop valve to the expansion device are disconnected (step 4). The finally separated condenser is connected to a refrigerant recovery device to recover the refrigerant (step 5).

As described above, in the refrigerant recovery method for the refrigeration system of this embodiment, the compressor is operated (step 1), the outlet stop valve of the condenser is closed (step 2), and the inlet stop valve of the condenser is closed. To close the refrigerant to allow the refrigerant to stay in the condenser (step 3),
Disconnect the circuit from the inlet stop valve to the compressor and the circuit from the outlet stop valve to the expansion device (step 4),
Since the separated condenser is connected to the refrigerant recovery device to recover the refrigerant (step 5), the refrigerant can be recovered economically and efficiently.

Next, one embodiment of the refrigerating apparatus remodeling method according to the present invention will be described with reference to the flowchart of FIG.

First, the operation of the compressor is stopped (step 1
1). Next, the inlet side stop valve and the outlet side stop valve of the condenser are closed (step 12). Next, the circuit from the inlet side stop valve to the compressor and the circuit from the outlet side stop valve to the expansion device are separated to remove the old condenser from the refrigeration system (step 13). Next, a new condenser containing refrigerant is prepared, and a circuit from the stop valve on the inlet side to the compressor and a circuit from the stop valve on the outlet side to the expansion device are connected to the refrigerating apparatus (step 14). Finally, the compressor is operated to adjust the refrigerant charge amount (step 15).

As described above, in the refrigerating apparatus remodeling method of this embodiment, the operation of the compressor is stopped (step 11), the inlet side stop valve and the outlet side stop valve of the condenser are closed (step 12),
Remove the old condenser from the refrigeration system by disconnecting the circuit from the inlet stop valve to the compressor and the circuit from the outlet stop valve to the expansion device (step 13), prepare a new condenser containing refrigerant and prepare the inlet. Since the circuit from the side stop valve to the compressor and the circuit from the outlet side stop valve to the expansion device are connected to the refrigerating device (step 15), the compressor is operated to adjust the refrigerant charge amount (step 15). , Contribute to the modification of refrigeration equipment that suits the usage environment.

[0124]

As described above, the present invention provides a condenser, an inlet stop valve provided on the inlet pipe of the condenser, an outlet stop valve provided on the outlet pipe of the condenser, and a closed container. Since the refrigerating device is composed of the closed container which is communicated between the inlet pipe and the outlet pipe via the stop valve, the inlet side stop valve provided in the inlet pipe of the condenser and the outlet pipe of the condenser. The refrigerant of the refrigeration system can be retained in the condenser by the outlet side stop valve provided in the. Further, the refrigerant can be economically and efficiently recovered by separating the condenser from the refrigerating apparatus while transporting the refrigerant while the refrigerant is retained and connecting the condenser to the refrigerant recovery apparatus.

Since the condenser separated from the refrigerating apparatus communicates with the closed container through the stop valve for the closed container,
It is safe to prevent the refrigerant from staying full in the condenser by opening the stop valve for the closed container immediately after disconnection, and to prevent the condenser from bursting and flowing out during transportation or storage before it is safe. . In addition, the condenser can be easily replaced with another condenser by the inlet side stop valve provided on the inlet pipe and the outlet side stop valve provided on the outlet pipe. Contribute to the modification of the refrigeration system.

Further, according to the present invention, the condenser, the inlet stop valve provided in the inlet pipe of the condenser, the outlet stop valve provided in the outlet pipe of the condenser, and the pressure in the condenser are Since the refrigerating device is composed of a closed container that is communicated between the inlet pipe and the outlet pipe through a rupture plate that ruptures when exceeding a predetermined value, an inlet side stop valve provided in the inlet pipe of the condenser and The refrigerant of the refrigeration system can be retained in the condenser by the outlet side stop valve provided on the outlet pipe of the condenser. Further, the refrigerant can be economically and efficiently recovered by separating the condenser from the refrigerating apparatus while transporting the refrigerant while the refrigerant is retained and connecting the condenser to the refrigerant recovery apparatus.

Further, since the condenser separated from the refrigerating apparatus communicates with the closed container through the rupture plate that ruptures when the internal pressure exceeds a predetermined value, in the unlikely event that the rupture plate ruptures and the refrigerant becomes It is safe because it can prevent the condenser from staying full of liquid and prevent the condenser itself from rupturing and flowing out of the refrigerant during transportation or storage. In addition, the inlet stop valve provided on the inlet pipe of the condenser and the outlet stop valve provided on the outlet pipe make it easy to attach and detach the condenser, so that it can be easily replaced with another condenser and is suitable for the operating environment. Contribute to the modification of the refrigeration system.

Further, according to the present invention, the condenser, the inlet side stop valve provided in the inlet pipe of the condenser, the outlet side stop valve provided in the outlet pipe of the condenser, and the pressure in the condenser are Since a refrigerating device is composed of a closed container that is communicated between the inlet pipe and the outlet pipe via a relief valve that opens when a predetermined value is exceeded, an inlet side stop valve provided in the inlet pipe of the condenser, The outlet stop valve provided in the outlet pipe of the condenser allows the refrigerant of the refrigeration system to stay in the condenser. Further, the refrigerant can be economically and efficiently recovered by separating the condenser from the refrigerating apparatus while transporting the refrigerant while the refrigerant is retained and connecting the condenser to the refrigerant recovery apparatus.

Further, since the condenser separated from the refrigerating apparatus communicates with the closed container through the relief valve that opens when the internal pressure exceeds a predetermined value, in the unlikely event that the relief valve opens, the refrigerant is condensed in the condenser. It is safe because it can be prevented from staying full of liquid and the rupture of the condenser itself and the outflow of the refrigerant during transportation or storage can be avoided. In addition, the condenser can be easily replaced with another condenser by the inlet side stop valve provided on the inlet pipe and the outlet side stop valve provided on the outlet pipe. Contribute to the modification of the refrigeration system.

Further, according to the present invention, the condenser, the inlet stop valve provided on the inlet pipe of the condenser, the outlet stop valve provided on the outlet pipe of the condenser, the inlet pipe and the outlet pipe are provided. Since a refrigerating device is composed of a rupture tube that is installed in series between the rupture tube and the rupture tube that ruptures when the internal pressure exceeds a predetermined value, and a closed container that covers the rupture tube, an inlet side stop valve provided in the inlet tube of the condenser. When,
The outlet stop valve provided in the outlet pipe of the condenser allows the refrigerant of the refrigeration system to stay in the condenser. Further, the refrigerant can be economically and efficiently recovered by separating the condenser from the refrigerating apparatus while transporting the refrigerant while the refrigerant is retained and connecting the condenser to the refrigerant recovery apparatus.

Further, the condenser separated from the refrigerating apparatus is connected in series with a rupturable tube in which the pressure in the condenser exceeds a predetermined value, and the outside of the rupturable tube is covered with a closed container. Even if the refrigerant stays full in the condenser and the internal pressure rises, only the rupture tube bursts at the specified pressure, avoiding rupture of the condenser itself and refrigerant outflow during transportation or storage. It's done and safe. In addition, the condenser can be easily replaced with another condenser by the inlet side stop valve provided on the inlet pipe and the outlet side stop valve provided on the outlet pipe. Contribute to the modification of the refrigeration system.

Further, according to the present invention, a condenser, an inlet side stop valve provided in an inlet pipe of the condenser, an outlet side stop valve provided in an outlet pipe of the condenser, the inlet pipe and the outlet pipe are provided. Since the refrigerating device is composed of a variable capacity closed container that communicates with the internal pressure exceeds a predetermined value and has a variable volume closed container, the inlet stop valve provided in the inlet pipe of the condenser and the outlet pipe of the condenser. The refrigerant of the refrigeration system can be retained in the condenser by the outlet side stop valve provided in the. Further, the refrigerant can be economically and efficiently recovered by separating the condenser from the refrigerating apparatus while transporting the refrigerant while the refrigerant is retained and connecting the condenser to the refrigerant recovery apparatus.

Further, since the condenser separated from the refrigerating apparatus is equipped with a variable capacity hermetically sealed container that increases in volume when the internal pressure exceeds a predetermined value, the capacity of the variable capacity hermetically sealed container is large in case of emergency. It is safe because the condenser itself can be prevented from bursting and the refrigerant flowing out during transportation or storage. In addition, the condenser can be easily replaced with another condenser by the inlet side stop valve provided on the inlet pipe and the outlet side stop valve provided on the outlet pipe. Contribute to the modification of the refrigeration system.

Further, according to the present invention, the condenser, the inlet stop valve provided in the inlet pipe of the condenser, the outlet stop valve provided in the outlet pipe of the condenser, and the stop valve for the closed container are used. A closed container communicating between the inlet pipe and the outlet pipe, an abnormal pressure detector for detecting an abnormal pressure in the condenser, and the closed container when the abnormal pressure detector detects an abnormal pressure Since the refrigerating apparatus is composed of the stop valve controller for opening the stop valve, the inlet side stop valve provided in the inlet tube of the condenser and the outlet side stop valve provided in the outlet tube of the condenser are used for the refrigerating apparatus. The refrigerant can be retained in the condenser. Also,
Refrigerant can be economically and efficiently recovered by separating the condenser from the refrigeration system and transporting it while the refrigerant is retained and connecting it to the refrigerant recovery device.

Further, the condenser separated from the refrigeration system has an abnormal pressure detector which is an abnormal pressure detecting means for detecting an abnormal increase in pressure, and a stop valve for a closed container which receives an output signal from the abnormal pressure detector. Since it is equipped with a stop valve controller that is a stop valve control means that opens, the stop valve for the closed container opens in case of emergency to prevent the refrigerant from staying full in the condenser, and It is safe to prevent the condenser itself from bursting and the refrigerant from flowing out during storage. In addition, the condenser can be easily replaced with another condenser by the inlet side stop valve provided on the inlet pipe and the outlet side stop valve provided on the outlet pipe. Contribute to the modification of the refrigeration system.

Further, according to the present invention, the compressor is operated, the stop valve on the outlet side of the condenser is closed, the stop valve on the inlet side of the condenser is closed to allow the refrigerant to stay in the condenser, and the refrigerant is compressed from the stop valve on the inlet side. Since the circuit to the machine and the circuit to the expansion device from the outlet stop valve are separated, and the separated condenser is connected to the refrigerant recovery device to recover the refrigerant, an economical and efficient refrigerant recovery method for the refrigeration system is provided. provide.

Further, according to the present invention, the operation of the compressor is stopped, the inlet stop valve and the outlet stop valve of the condenser are closed, the circuit from the inlet stop valve to the compressor and the outlet stop valve to the expansion device. Separate the circuits going to each other, remove the old condenser from the refrigeration system, prepare a new condenser containing refrigerant, and refrigerate the circuit from the stop valve on the inlet side to the compressor and the circuit from the stop valve on the outlet side to the throttle device. Since the compressor is operated and the compressor is operated to adjust the amount of refrigerant to be enclosed, an economical and efficient refrigeration system remodeling method suitable for the environment of use is provided.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle diagram of a refrigeration system according to a first embodiment of the present invention.

FIG. 2 is a refrigeration cycle diagram of a refrigeration system according to a second embodiment of the present invention.

FIG. 3 is a refrigeration cycle diagram of a refrigeration system according to a third embodiment of the present invention.

FIG. 4 is a refrigeration cycle diagram of a refrigeration system according to a fourth embodiment of the present invention.

FIG. 5 is a refrigeration cycle diagram of a refrigeration system according to a fifth embodiment of the present invention.

FIG. 6 is a refrigeration cycle diagram of a refrigeration system according to a fifth embodiment of the present invention.

FIG. 7 is a flowchart showing a refrigerant recovery method of the refrigeration system of the present invention.

FIG. 8 is a flowchart showing a refrigerating apparatus remodeling method of the present invention.

FIG. 9 is a refrigeration cycle diagram of a conventional refrigeration system.

[Explanation of symbols]

 2a, 2b, 2c, 2d, 2e, 2f Condenser 11 Inlet pipe 12 Outlet pipe 13 Inlet stop valve 14 Outlet stop valve 15 Sealed container 16 Sealed container stop valve 17 Bursting plate 18 Relief valve 19 Sealed container 20 Bursting pipe 21 Variable Capacity Sealed Container 22 Sealed Container Stop Valve 23 Abnormal Pressure Detector 24 Stop Valve Controller

Claims (8)

[Claims] 1. A condenser, an inlet stop valve provided in an inlet pipe of the condenser, an outlet stop valve provided in an outlet pipe of the condenser, and the inlet pipe through a stop valve for a closed container. And a closed container which is communicated between the outlet pipe and the outlet pipe. 2. A condenser, an inlet-side stop valve provided in an inlet pipe of the condenser, an outlet-side stop valve provided in an outlet pipe of the condenser, and the pressure in the condenser exceeds a predetermined value. A refrigerating apparatus comprising: a closed container in which the inlet pipe and the outlet pipe are communicated with each other via a bursting plate that bursts. 3. A condenser, an inlet-side stop valve provided in an inlet pipe of the condenser, an outlet-side stop valve provided in an outlet pipe of the condenser, and a pressure inside the condenser exceeds a predetermined value. A refrigerating apparatus comprising a closed container which is in communication between the inlet pipe and the outlet pipe via a relief valve that opens. 4. A condenser, an inlet-side stop valve provided in the inlet pipe of the condenser, an outlet-side stop valve provided in the outlet pipe of the condenser, and between the inlet pipe and the outlet pipe. A refrigerating apparatus provided with a rupture tube that is provided in series and that ruptures when the pressure in the condenser exceeds a predetermined value, and a closed container that covers the rupture tube. 5. A condenser, an inlet-side stop valve provided in an inlet pipe of the condenser, an outlet-side stop valve provided in an outlet pipe of the condenser, and between the inlet pipe and the outlet pipe. A refrigerating apparatus including a variable capacity closed container which communicates with the condenser to increase the volume when the pressure in the condenser exceeds a predetermined value. 6. A condenser, an inlet-side stop valve provided in an inlet pipe of the condenser, an outlet-side stop valve provided in an outlet pipe of the condenser, and the inlet pipe via a stop valve for a closed container. And a closed container in communication with the outlet pipe, an abnormal pressure detection means for detecting an abnormal pressure in the condenser, and the closed container stop valve when the abnormal pressure detection means detects an abnormal pressure A refrigeration system provided with a stop valve control means for opening. 7. A refrigerating apparatus having an inlet side stop valve in a condenser inlet pipe and an outlet side stop valve in an outlet pipe of the condenser, wherein a compressor is operated and the outlet side stop valve is closed, A side stop valve is closed to allow the refrigerant to stay in the condenser, and a circuit from the inlet side stop valve to the compressor and a circuit from the outlet side stop valve to the expansion device are separated from each other,
A refrigerant recovery method for a refrigeration system in which the separated condenser is connected to a refrigerant recovery device to recover the refrigerant. 8. A refrigerating apparatus comprising an inlet side stop valve in a condenser inlet pipe and an outlet side stop valve in an outlet pipe of the condenser, wherein operation of a compressor is stopped, and the inlet side stop valve and the outlet side Close the stop valve, disconnect the circuit from the inlet side stop valve to the compressor and the circuit from the outlet side stop valve to the expansion device, remove the condenser from the refrigeration system, and install a new condenser containing refrigerant. Prepare and connect a circuit from the inlet side stop valve to the compressor and a circuit from the outlet side stop valve to the expansion device to the refrigeration system, respectively, and operate the compressor to adjust the refrigerant charge amount. Refrigeration system modification method.