JPS633156A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention: a. Industrial Application Field The present invention relates to a refrigeration system, and in particular, to a refrigeration system that uses brine as a heat medium for cooling and maintains at least two refrigeration chambers at different temperature settings using one refrigerator. Concerning new improvements to.

b. Conventional technology Various configurations have been adopted and proposed for this type of refrigeration device that has been used in the past, but a typical configuration is listed in Japanese Patent Application Laid-Open No. 55-68567. There are configurations shown in Japanese Patent Publication No. 53-80866.

FIG. 4 is a cooling system diagram used in the above-mentioned conventional apparatus, etc. In the figure, what is indicated by reference numeral 1 is a cooling brine tank. A cooler 3 for guiding the refrigerant is provided.

This refrigeration section 2 includes a compressor 4, a condenser 5. fan motor 6
The refrigerant compressed by the compressor 4 is supplied to the cooler 3 via the condenser 5 and the capillary tube 7.

In this cooling brine tank 1, brine 8 which is a heat medium for cooling is accommodated, and a brine temperature control section 9 for controlling the temperature of this brine 8 to a predetermined temperature.
is provided.

A circulation pump 11 is installed in the suction pipe 10 provided at the bottom 1a of the cooling brine tank 1, and first and second electromagnetic valves 13 and 14 are connected to the outlet pipe 12 of the circulation pump 11. has been done.

A first heat exchanger 15 is connected to the first solenoid valve 13, and an outlet pipe 16 of the first heat exchanger 15 is connected to a return pipe 17 connected to the cooling brine tank 1. There is. Further, a second heat exchanger 18 is connected to the second electromagnetic valve 14, and an outlet pipe 19 of the second heat exchanger 18 is connected to the return pipe 17 described above.

The above-mentioned first and second heat exchangers 15 and 18 are each arranged in a refrigerating room (not shown), and the temperature inside the refrigerating room is controlled by an inside temperature control section (not shown). This is done by controlling the opening and closing of each electromagnetic valve 16 and 14.

The conventional refrigeration device is configured as described above, and its operation will be explained below.

First, the refrigerant is supplied to the cooler 3 by the operation of the freezing section 2, and the brine 8 in the cooling brine tank 1 is cooled by heat exchange with the cooler 3. Furthermore, this brine 8
The temperature of the freezing section 2 is controlled by the brine temperature control section 9.
By controlling the operation of the compressor 4, the temperature is controlled to a predetermined temperature set value.

As mentioned above, the brine 8 in the cooling brine tank 1 controlled to a predetermined temperature set value is passed through the solenoid valves 16 and 14 by the circulation pump 11, and then transferred to each heat exchanger 15.
and 18, and again returns to the cooling brine tank 1 via the return pipe 17.

As described above, by continuously circulating and supplying the brine 8, each of the aforementioned refrigerating compartments (not shown) is cooled by heat exchange with the heat exchangers 15 and 18.

The temperature control of the brine 8 is performed by controlling the temperature of the brine to be approximately 3° C. lower than the internal temperature control unit (not shown) of the refrigerator compartment which is set lower than the temperature of the refrigerator compartment. By Part 9.

This is done by controlling the operation of the compressor 4 of the refrigeration section 2.

Moreover, the internal temperature control of each of the refrigerator compartments (not shown) is achieved by controlling the opening and closing of each electromagnetic valve 13 and 14 by an internal temperature control section (not shown). When both the solenoid valves 13 and 14 are turned off, the circulation pump 11 stops its operation.

C9 Problems to be solved by the invention Since the conventional refrigeration device is configured as described above,
For example, if the internal temperature of each refrigerator compartment is set to approximately the same temperature set value, almost no problem will occur even if brine at the same temperature is used in the single cooling brine tank mentioned above. However, a problem occurred when the internal temperature settings for each refrigerator compartment were different.

That is, if one refrigerator compartment is set to -3°C and the other refrigerator compartment is set to +2°C, the first solenoid valve 13 is turned off at -3°C in the internal temperature control section of one refrigerator compartment. , -2,5
It is controlled to turn on at °C, but at this time brine 8
Is the brine temperature control section so that the temperature is -6°C? is controlled by.

In the case mentioned above, it has been confirmed from experimental results that the internal temperature of the refrigerator can be cooled down to approximately +3°C above the brine temperature, and as a result, one of the refrigerators can be cooled down to the above-mentioned temperature setting of -3°C. It is possible to control.

However, in the other refrigerator compartment, the temperature set point is +2°
C, the second solenoid valve 14 is set to + in the refrigerator temperature control section.
Controlled off at 2°C and on at +2.5'C,
In this case, since the brine temperature has dropped to 16°C, the brine temperature will drop to about 0°C to -1°C, and the temperature will drop to about +2°C to +2.5°C. Constant temperature is no longer maintained, and as a result, the temperature ranges from -1 to +2.5°C, and the temperature difference becomes extremely large.

Therefore, the brine circulation type refrigeration system originally requires constant temperature, but in the case of two-room control, only one room can be controlled normally, but the other room cannot be controlled. However, it was difficult to control the two chambers to different temperature states.

SUMMARY OF THE INVENTION An object of the present invention is to promptly solve the above-mentioned problems and provide a refrigeration system that can control two refrigeration compartments at various temperature settings.

d. Means for Solving the Problems of the Invention The refrigeration system according to the present invention includes a first brine cooling chamber and a second brine cooling chamber for configuring a cooling brine tank, and a second brine cooling chamber provided in the first brine cooling chamber. , a cooler connected to a freezing section, and a first circulation pump for merging the brine in the first brine cooling chamber and the brine in the second brine cooling chamber, and the cooler cools the inside of each brine tank. brine is cooled to different temperatures.

00 Effect In the refrigeration system according to the present invention, since the brine cooling chambers are independently connected to each of the refrigerating compartments, even if the refrigerating compartments are set to different temperature settings with large temperature differences, the Each temperature can be independently controlled to any set value without being influenced by temperature.

f. Embodiments Hereinafter, preferred embodiments of the refrigeration apparatus according to the present invention will be described in detail with reference to the drawings.

Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.

1 to 3 are for showing the refrigeration system according to the present invention, with FIG. 1 showing a cooling system diagram, and FIGS. 2 and 3 showing the overall structure.

First, before explaining the configuration of the cooling system, let's start with Figures 2 and 5.
The overall structure of the refrigeration device according to the present invention will be explained using the drawings.

In FIGS. 2 and 3, the reference numeral 20 indicates a main body case filled with a heat insulating material and having an almost box shape as a whole. , a plurality of door bodies 22 are provided so as to be openable and closable.

Inside this main body case 20, a first refrigerating compartment 24 and a second refrigerating compartment 25 are formed by a partition wall 23, and a cooling duct 26 is provided on the back side of each of these refrigerating compartments 24 and 25. has been done.

A first heat exchanger 15 and a second heat exchanger 18 are provided on the cooling duct 26 in each of the aforementioned refrigerator compartments 24 and 25, and each of these heat exchangers 15 and 18 is provided with an internal fan 27. is provided, and the cold air from each heat exchanger 15 and 18 is circulated by this internal fan 27 to each refrigerator compartment 24 and 2.
It is cycled within 5.

A drain plate 28 is disposed between the cooling duct 26 and each of the heat exchangers 15 and 18, and the rear end 2 of each drain plate 28 is disposed between the cooling duct 26 and each heat exchanger 15 and 18.
A drain pipe 30 is connected to 9, and waste water is discharged to the outside from the lower end 31 of the main body case 20.

Moreover, in each of the refrigerator compartments 24 and 2S (in this case, a first compartment temperature control unit 32 and a second compartment temperature control unit 33 are provided, which control the drive of a circulation pump, which will be described later), and 2
This is a configuration for controlling the internal temperature of No. 5.

Next, a cooling unit 34 is placed on the top plate 20a of the main body case 20, and this cooling unit 64
It consists of a cooling system as shown in the figure.

In the cooling unit 34, what is indicated by reference numeral 1 is a cooling brine tank, and this cooling brine tank 1 is separated from a first brine cooling chamber 1b and a second brine cooling chamber 1c by a partition wall 35. It is configured.

In the first brine cooling chamber 1b, a cooler 3 connected to the freezing section 2 and for guiding a refrigerant is disposed.

The refrigeration section 2 includes a compressor 4, a condenser 5, and a fan motor 6.
The refrigerant compressed by the compressor 4 is supplied to the cooler 3 via the condenser 5 and the capillary tube 7.

In each of the brine cooling chambers 1b and 1c, a brine 8, which is a heat medium for cooling, is accommodated, and a first brine temperature control section 9a and a second brine temperature control section 9a and a second brine temperature control section 9a are used to control the temperature of the brine 8 to a predetermined temperature. A brine temperature control section 9b is provided.

The brine temperature control section 9a maintains the temperature of the brine 8 in the first brine cooling chamber 1b at a predetermined temperature setting value by controlling the drive of the compressor 4, and the brine temperature control section 9b: The temperature of the brine 8 in the second brine cooling chamber 1c is maintained at a predetermined temperature setting value by controlling the drive of the first circulation pump 36, which will be described later.

A first circulation pump 36 is provided in the suction pipe 10 provided at the bottom +bA of the first brine cooling chamber 1b, and this circulation pump 36 is connected to an outlet pipe 37. Therefore, the brine 8 in the first brine cooling chamber 1b is supplied into the second brine cooling chamber 1c by the first circulation pump 36, and the brine 8 overflowing from the second brine cooling chamber 1c is transferred to the first brine cooling chamber 1b. The brine 8 in the second brine cooling chamber 1b is cooled by the brine 8 in the first brine cooling chamber 1b because it is returned and circulated within the brine cooling chamber 1b.

Furthermore, a second brine tank connected to the first brine tank 1b
The circulation pump 11a is connected to the first return pipe 68 via the first heat exchanger 15, and only the brine 8 in the first brine cooling chamber 1b is circulated and supplied to the first heat exchanger 15.

Furthermore, the brine 8 in the first brine cooling chamber 1b is controlled by a first brine temperature control unit 9a set to be 6° C. lower than the set value of the first internal temperature control unit 32 in the first refrigerator compartment 24. By controlling the compressor 4, the temperature is controlled to a predetermined temperature.

Furthermore, by controlling the second circulation pump j1a by the first internal temperature control section 32, the inside of the first refrigerator compartment 24 is controlled to a predetermined constant temperature state.

On the other hand, the third circulation pump ++b connected to the second brine cooling chamber 1c is connected to the second return pipe 39 via the second heat exchanger 18, so that only the brine 8 in the second brine cooling chamber 1c is It is circulated and supplied to this second heat exchanger 18.

Furthermore, the brine 8 in the second brine cooling chamber 1c is set at a second brine temperature control section 9b that is set 3° C. lower than the set value of the second internal temperature control section 33 in the second refrigerator compartment 25. By controlling the first circulation pump 36, the temperature is controlled to a predetermined temperature.

Further, by controlling the sixth circulation pump 11b by the second refrigerator internal temperature control section 33, the inside of the second refrigerator compartment 25 is controlled to a predetermined constant temperature state.

The refrigeration device according to the present invention is configured as described above, and its operation will be described below.

First, the first refrigerating compartment 24 is -3°C1, the second refrigerating compartment 25 is +3°C.
When the internal temperature control units 32 and 36 are set to 3°C, refrigerant is supplied to the cooler 3 by the operation of the freezing unit 2, and the temperature in the cooling brine tank 1 is increased by heat exchange with the cooler 3. The brine 8 in the first brine cooling chamber 1b is cooled.

The brine 8 in the first brine cooling chamber 1b is sent into the second brine cooling chamber 1c by the operation of the first circulation pump 36, and the brine 8 overflowing in the second brine cooling chamber 1c passes through the partition wall 35. Climb over to the 1st brine cooling room 1
b, and the brine 8 in the second brine cooling chamber 1c is cooled.

Next, the brine 8 in the first brine cooling chamber 1b is controlled by the first brine temperature control unit, which is set 3°C lower than the set value of the first internal temperature control unit 32 in the first refrigerator compartment 24. a
By controlling the compressor 4, the temperature is controlled to a predetermined temperature. Moreover, the brine 8 in the second brine cooling chamber 1c is controlled by a second brine temperature control section that is set 6° C. lower than the set value of the second internal temperature control section 33 in the second refrigerator compartment 25. b controls the first circulation pump 36 to a predetermined temperature higher than the temperature of the brine 8 in the first brine cooling chamber 1b.

Therefore, the inside of the first refrigerator compartment 24 is controlled to a predetermined constant temperature state via the first heat exchanger 15 by controlling the second circulation pump +1a by the first internal temperature control unit 32. . On the other hand, the second refrigerator compartment 25 is connected to the first refrigerator compartment 24 via the second heat exchanger 18 by controlling the third circulation pump 11b by the second internal temperature control section 36. are controlled to different, higher predetermined constant temperature conditions.

In other words, when the aforementioned first refrigerator compartment 24 is controlled at around -3°C, which is suitable for maintaining the freshness of meat, etc., the second refrigerator compartment 25 is controlled at around 3°C, which is suitable for maintaining the freshness of vegetables, etc. When controlled, one compressor in one refrigeration system can maintain two refrigeration compartments with different temperatures at an ideal constant temperature and high humidity state.

In addition, although the above-mentioned cooling brine tank 1 has been described as having a body configuration in which the brine cooling chambers 1b and 1c are partitioned by the partition wall 65, the cooling brine tank 1 is not limited to the above-mentioned embodiment.
It goes without saying that the same effects can be obtained even when a separate structure is used. Also, although the number of refrigerator compartments is two, it goes without saying that the configuration can include two or more refrigerator compartments.

g0 Effects of the Invention Since the refrigeration device according to the present invention is configured as described above, a plurality of refrigerating compartments can be controlled to different temperatures using one compressor.

In addition, each heat exchanger installed in each refrigerator compartment is independently connected to each brine cooling compartment with a different temperature, so the internal temperature will not be influenced by the brine temperature and will maintain a stable temperature. It is possible to obtain a multi-chamber refrigeration system that can be controlled with an arbitrary temperature set value and has excellent constant temperature.

[Brief Description of the Drawings] Figures 1 to 6 are for showing the refrigeration system according to the present invention. Figure 1 is a cooling system diagram showing the cooling system, and Figure 2 is a front view showing the overall configuration. 3 is a side sectional view of FIG. 2, and FIG. 4 is a cooling system diagram showing a conventional refrigerator. 1 is a brine tank for cooling, 1b is a first brine cooling chamber, 1c is a second brine cooling chamber, 2 is a freezing section, 3 is a cooler, 4 is a compressor, 8 is brine, 9a is a first brine temperature control section , 9b is a second brine temperature control section, and 11a is a second brine temperature control section.
a circulation pump, 11b a third circulation pump, 15 a first heat exchanger, 18 a second heat exchanger, 24 a first refrigerator compartment, 25 a second refrigerator compartment, 32 a first internal temperature control section, 33 is a second internal temperature control section, and 36 is a first circulation pump.

Claims (4)

[Claims] (1) Cool the brine (8), which is a heat medium housed in the cooling brine tank (1), and cool the brine (8).
) was circulated through at least two heat exchangers (15) and (18) by circulation pumps (11a) and (11b) to cool at least two refrigerator compartments (24) and (25). In the refrigeration device, a first brine cooling chamber (1b) for configuring the cooling brine tank (1).
and a second brine cooling chamber (1c), a cooler (3) provided in the first brine cooling chamber (1b) and connected to the freezing section (2), and the first brine cooling chamber (1b). a first circulation pump (36) for circulating the brine (8) in the brine cooling chamber (1c) and the brine (8) in the second brine cooling chamber (1c); The second brine cooling chamber (1c) is heated by the brine (8).
A refrigeration device characterized in that the brine (8) in ) is cooled. (2) a second circulation pump (11a) and a first heat exchanger (15) connected to the first brine cooling chamber (1b); and a third circulation pump (11a) and a first heat exchanger (15) connected to the second brine cooling chamber (1c). The first heat exchanger (15) is equipped with a circulation pump (11b) and a second heat exchanger (18), and the first heat exchanger (15) is connected to one of the refrigerator compartments (24).
), and the second heat exchanger (18) is arranged in the other refrigerator compartment (25). (3) It has a brine temperature control section (9b) provided in the second brine cooling chamber (1c), and the first circulation pump (36) is controlled by this brine temperature control section (9b). A refrigeration device according to claim 1 or 2, characterized in that the refrigeration device is configured as follows. (4), comprising indoor temperature control sections (32) and (33) for controlling the indoor temperature of the refrigerator compartments (24) and (25), and the temperature of the brine temperature control sections (9a) and (9b); 4. The refrigerating device according to claim 3, wherein the set value is set to be a predetermined temperature lower than the temperature set values of the indoor temperature control units (32) and (33).