JPH0526537A - Air-conditioner - Google Patents

Abstract

PURPOSE:To provide the refrigerant circuit of an air-conditioner which enables simultaneous operation of cooling and heating in different rooms or places and reduces the number of pipings and the overall length of the pipings for interconnecting devices. CONSTITUTION:An outdoor heat-exchanger 3, a second indoor heat-exchanger 14, and a first indoor heat-exchanger 4 are interconnected in series, and large solenoid valves 9 and 10 are connected in series between the outdoor heat- exchanger 3 and the second indoor heat-exchanger 14 and between the second indoor heat-exchanger 14 and the first indoor heat-exchanger 4. Pressure reducing devices 7 and 8 are located in parallel to the large solenoid valves 9 and 10. By opening and closing the large solenoid valves 9 and 10, a condenser and a vaporizer are changed, and simultaneous cooling and heating of different rooms or places is practicable, amenity is improved, and the number of pipings and the overall length of the pipings through which the devices are interconnected are reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner for cooling and heating two rooms or two places.

[0002]

2. Description of the Related Art In recent years, the appearance of a building has been emphasized, and if possible, a heat pump type air conditioner in which an outdoor unit is placed in an air-conditioned room and many rooms can be cooled and heated with a small number of devices is becoming popular.

The structure of the refrigerant circuit of this type of air conditioner will be described with reference to FIG.

As shown in the figure, a compressor 101, a four-way valve 1
02, outdoor heat exchanger 103, pressure reducing device 104, solenoid valve 1
05, 106, liquid-side three-way valves 107, 108, and gas-side three-way valves 109, 110 are connected in sequence to form an outdoor unit 111, and the liquid-side three-way valve 10 of the outdoor unit 111.
Indoor units 114, 11 in which indoor heat exchangers 112, 113 are built in between 7, 108 and gas side three-way valves 109, 110
5 are connected by pipes 116, 117, 118 and 119,
It forms a refrigerant circuit.

In the above structure, the solid arrow in FIG.
During cooling, the broken line arrow indicates the flow of the refrigerant during heating, and during cooling, the refrigerant compressed by the compressor 101 passes through the four-way valve 102 and is condensed in the outdoor heat exchanger 103 and decompressor 104. The indoor heat exchangers 112, 11 built in the indoor units 114, 115 via the solenoid valves 105, 106, the liquid-side three-way valves 107, 108, and the pipes 116, 117 after being depressurized
After evaporating in 3 to cool the indoor air, the pipes 118, 11
The cycle of returning to the compressor 101 via the gas side three-way valves 109 and 110 and the four-way valve 102 is repeated. Further, during heating, the refrigerant compressed by the compressor 101 passes through the four-way valve 102, the gas-side three-way valves 109 and 110, and the pipes 118 and 119, and the indoor heat exchanger 11 built in the indoor units 114 and 115.
After heating the indoor air condensed by 2,113, the pipe 11
6, 117, liquid side three-way valves 107, 108, solenoid valve 10
The pressure is reduced in the decompression device 104 via 5, 106, evaporated in the outdoor heat exchanger 103, and passed through the four-way valve 102 to the compressor 10
The cycle of returning to 1 was repeated.

[0006]

In such a conventional refrigerant circuit for an air conditioner, the pipes 116, 117, and the indoor units 114, 115 are connected to the pipes 116, 117, respectively.
118 and 119 are required, and the installation work between the outdoor unit 111 and the indoor units 114 and 115 is performed by the outdoor unit 11.
1 and the indoor units 114, 115 are often separated from each other, which requires a long time for the pipe connection work and requires a long connection pipe.

Further, due to the difference in the place where the indoor units 114 and 115 are installed, even if one wants to perform a cooling operation and the other wants to perform a heating operation at the changing of seasons, either the cooling operation or the heating operation can be performed. However, in this sense, there is a problem that the multi-chamber type is rather inconvenient.

The present invention solves such a problem, and an object of the present invention is to provide a refrigerant circuit of an air conditioner which can reduce the number and length of connecting pipes and can perform cooling operation and heating operation at the same time. I am trying.

[0009]

In order to achieve the above object, the present invention is directed to a compressor, a four-way valve, an outdoor heat exchanger, a first indoor heat exchanger, a liquid side three-way valve, and a gas side. A three-way valve is sequentially connected, a large-diameter solenoid valve having a larger diameter than the liquid-side piping between the liquid-side three-way valve and the outdoor heat exchanger, and a pressure reducing device connected in parallel with the large-diameter solenoid valve, An air conditioner including the large diameter solenoid valve between the gas side three-way valve and the first indoor heat exchanger, a refrigerant circuit in which a pressure reducing device is connected in parallel with the large diameter solenoid valve, and the liquid side of the air conditioner. The refrigerant circuit of the air conditioner is configured such that an indoor unit having a second indoor heat exchanger is connected between the three-way valve and the gas-side three-way valve.

[0010]

According to the present invention having the above-mentioned structure, the pressure reducing device is switched by opening and closing the large-diameter solenoid valve, and the compressor, the four-way valve, the outdoor heat exchanger, the pressure reducing device, and the liquid side three-way valve are provided.
Refrigerant circulates sequentially through the gas side three-way valve and the first indoor heat exchanger through the indoor unit having the second indoor heat exchanger and the connecting pipe connecting the indoor units to provide cooling and heating. It can be operated at the same time, and the indoor air can be simultaneously operated for cooling and heating.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 1, a compressor 1 and a four-way valve 2
, The outdoor heat exchanger 3, the first indoor heat exchanger 4, the liquid side three-way valve 5, and the gas side three-way valve 6 are sequentially connected, and between the liquid side three-way valve 5 and the outdoor heat exchanger 3. The liquid side piping 16, 17
A larger large-diameter solenoid valve 9 and a decompression device 7 are connected in parallel with the large-diameter solenoid valve 9, and the gas side three-way valve 6 and the first
An air conditioner 11 including a large-diameter solenoid valve 10 between the indoor heat exchangers 4 and a refrigerant circuit in which a pressure reducing device 8 is connected in parallel with the large-diameter solenoid valve 10; An indoor unit 15 that is provided and can perform air conditioning in the room by the first indoor heat exchanger 4, and has a second indoor heat exchanger 14 built in between the liquid side three-way valve 5 and the gas side three-way valve 6 of the air conditioner 11. Is connected to the pipes 12 and 13 to form the refrigerant circuit of the air conditioner.

In the above structure, the solid arrows shown in FIG. 1 indicate the operation of two cooling units and the cooling operation of the indoor unit 15,
Thick line arrows indicate the cooling operation during cooling by the first indoor heat exchanger 4, and dashed arrows indicate the heating operation during heating by the first indoor heat exchanger 4 and the cooling operation during cooling operation by the indoor unit 15. , The one-dot chain line arrow shows the flow of the refrigerant when two heating units are in operation. For example, when operating two cooling units, the refrigerant compressed by the compressor 1 is condensed by the outdoor heat exchanger 3 via the four-way valve 2 and the large-diameter solenoid valve 9 is closed.
After being decompressed by the decompression device 7 and passing through the liquid side three-way valve 5 and the pipe 12, a part of the refrigerant is evaporated in the second indoor heat exchanger 14 incorporated in the indoor unit 15 to cool the indoor air, and then the pipe 13 is connected. Return to the air conditioner 11 via the gas side three-way valve 6. Further, by opening the large-diameter solenoid valve 10, the pressure reducing device 8 is not passed, and the pressure loss of the refrigerant is minimized through the large-diameter solenoid valve 10 to sufficiently evaporate even in the first indoor heat exchanger 4, so that the indoor air After cooling, the cycle of returning to the compressor 1 via the four-way valve 2 is repeated. If the amount of refrigerant circulating in the indoor unit 15 is set to a sufficient value, the cooling of the indoor unit 15 is performed by one unit.

When the first indoor heat exchanger 4 is in the single cooling operation, the above-described cooling operation and the outdoor heat exchanger 3 are the same.
When the large-diameter solenoid valve 9 is opened, the refrigerant is further condensed in the second indoor heat exchanger 14 via the liquid side three-way valve 5 and the pipe 12 without passing through the pressure reducing device 7, and the refrigerant subcool is removed. , The pipe 13 and the gas side three-way valve 6 are closed to close the large-diameter solenoid valve 10 to reduce the pressure in the decompression device 8, and the air conditioner 11 provided in the room evaporates in the first indoor heat exchanger 4. To cool the indoor air.

When one is for heating and the other is for cooling, the first indoor heat exchanger 4 uses the condensing heat to cool the air conditioner 11.
The room provided with is in the heating operation, and during the indoor unit cooling operation, the refrigerant compressed by the compressor 1 passes through the four-way valve 2 and is condensed by the first indoor heat exchanger 4 to heat the indoor air, and then the large diameter After the solenoid valve 10 is closed, the pressure is reduced by the pressure reducing device 8 and the gas side three-way valve 6 and the pipe 13 are passed through the second indoor heat exchanger 14 incorporated in the indoor unit 15 to evaporate and cool the indoor air.
By opening the large-diameter solenoid valve 9 via the pipe 12 and the liquid side three-way valve 5, the pressure loss of the refrigerant is minimized to further evaporate in the outdoor heat exchanger 3, and the compressor is passed via the four-way valve 2. 1
Repeat the cycle back to.

Further, when two heating units are in operation, the indoor air condensed by the first indoor heat exchanger 4 is heated to heat the large-diameter solenoid valve 1.
By opening 0, the gas is not decompressed by the decompression device 8 and is further condensed in the second indoor heat exchanger via the gas side three-way valve 6 and the pipe 13, and after heating the indoor air, the pipe 12 and the liquid side. By closing the large-diameter solenoid valve 9 via the three-way valve 5, the pressure is reduced by the pressure reducing device 7 and evaporated by the outdoor heat exchanger 3,
Return to the compressor 1 via the four-way valve 2.

As described above, according to the refrigerant circuit of the air conditioner of the embodiment of the present invention, by opening and closing the large-diameter solenoid valves 9 and 10, the position of decompressing the decompressing devices 7 and 8 is changed, so that the compression is performed. Machine 1, four-way valve 2, outdoor heat exchanger 3, liquid side three-way valve 5, pipes 12 and 13, indoor unit 15 incorporating second indoor heat exchanger 4, gas side three-way valve 6, first indoor heat exchanger Refrigerant is circulated through 4 sequentially, and cooling and heating by the indoor unit 15 and the air conditioner 11 can be freely changed.

[0018]

As is apparent from the above embodiments, according to the present invention, the air conditioner is installed indoors, and the outdoor heat exchanger, the second indoor heat exchanger, and the A first indoor heat exchanger is connected in series as an air conditioner, and a large space is provided between the outdoor heat exchanger and the second indoor heat exchanger and between the second indoor heat exchanger and the first indoor heat exchanger. Connect caliber solenoid valves in series,
A pressure reducing device is provided in parallel with the large-diameter solenoid valve, and by changing the condenser and the evaporator by opening and closing the large-diameter solenoid valve, it is possible to simultaneously operate cooling and heating in different rooms or places, Since the comfort is improved and the number of pipes connecting each device and the air conditioner are placed indoors, it is possible to provide the refrigerant circuit of the air conditioner that can reduce the length.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a refrigerant circuit diagram of a conventional air conditioner.

[Explanation of symbols]

 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 First indoor heat exchanger 5 Liquid side three-way valve 6 Gas side three-way valve 7,8 Pressure reducing device 9,10 Large diameter solenoid valve 11 Air conditioner 14 Second indoor heat exchanger 15 Indoor unit 16, 17 Liquid side piping

Claims (1)

Claims: 1. A compressor, a four-way valve, an outdoor heat exchanger,
A large-diameter solenoid valve in which the first indoor heat exchanger, the liquid-side three-way valve, and the gas-side three-way valve are sequentially connected, and the diameter is larger than that of the liquid-side pipe between the liquid-side three-way valve and the outdoor heat exchanger. , A pressure reducing device is connected in parallel with the large diameter solenoid valve, and the gas side three-way valve and the first
An air conditioner equipped with the large-diameter solenoid valve between the indoor heat exchangers, a refrigerant circuit in which a pressure reducing device is connected in parallel with the large-diameter solenoid valve, the liquid side three-way valve and the gas side three-way valve of the air conditioner. An air conditioner in which an indoor unit having a second indoor heat exchanger is connected between the air conditioners.