KR100452364B1 - A service valve's structure of the air-conditioner - Google Patents

Abstract

The present invention relates to a service valve of a multi-type air conditioner in which a plurality of indoor units are installed in one outdoor unit, and in particular, a main service valve which can open and close each of a plurality of service valves simultaneously with a single operation is installed on the outer wall of the outdoor unit. In addition, the present invention relates to a service valve structure of a multi-type air conditioner, which can determine a refrigerant supply to all indoor units without dismantling an outdoor unit, thereby facilitating a pump-down operation.

The service valve structure of the multi-type air conditioner according to the present invention includes a compressor, an outdoor heat exchanger, a refrigerant pipe branched to supply the refrigerant discharged from the outdoor heat exchanger to a plurality of indoor units, and a refrigerant pipe connected to an inlet of the compressor. A multi-type air conditioner including a plurality of service valves installed on each of the outdoor units and fixed to the outer wall of the outdoor unit to determine whether to supply refrigerant to each indoor unit, wherein the plurality of the service valves are operated on one side of the outer wall of the outdoor unit by one operation. It is characterized in that the main service valve is installed to open and close at the same time.

Description

A service valve's structure of the air-conditioner

The present invention relates to a service valve of a multi-type air conditioner in which a plurality of indoor units are installed in one outdoor unit, and in particular, a main service that can open and close all the plurality of service valves for determining a refrigerant supply to each indoor unit in one operation. The valve is installed on the outer wall of the outdoor unit, so that it is possible to determine the refrigerant supply to all the indoor units without dismantling the outdoor unit, thereby facilitating the pump-down operation during the previous installation or repair of the air conditioner. The service valve structure of the machine.

In general, an air conditioner is a device for maintaining indoor air comfort by forcibly suctioning indoor air to remove cooling, heating, dehumidification, or removing impurities in the air and returning it back to the room. There are many air conditioners such as a duct type and a multi type, but here, only the multi type air conditioner provided with four outdoor units will be described.

1 is a block diagram showing a multi-type air conditioner according to the prior art.

The multi-type air conditioner according to the prior art includes one outdoor unit 10, a plurality of indoor units 40, and a refrigerant pipe 30 connecting the outdoor unit 10 and the plurality of indoor units 40.

The outdoor unit 10 includes a compressor 12 for compressing a refrigerant at a high temperature and a high pressure, an outdoor side heat exchanger 14 for exchanging heat from the refrigerant supplied from the compressor 12 with outdoor air, and the outdoor side heat exchanger. A plurality of expansion valves 16 installed in branch pipes 32 branched by the number of the indoor units 40 so that the refrigerant supplied from 14 is supplied to each indoor unit 40, and the branch pipes 32 And a plurality of service valves 20 installed on the cabinet outer wall of the outdoor unit 10 to determine whether or not the refrigerant is circulated to each indoor unit 40, and installed before the branch pipe 32. It is configured to include a main service valve 26 to determine whether the refrigerant circulation to all the indoor unit (40) by the operation.

The service valve 20 is installed on the discharge pipe of the expansion valve 16, is installed on the outer wall of the outdoor unit 10, the high-pressure side service valve 22 for determining the refrigerant supply to each of the indoor unit 40, It is configured to include a low pressure side service valve 24 for determining whether to recover the refrigerant flowing from each of the indoor unit (40).

In addition, the main service valve 26 is also installed in the discharge pipe of the outdoor side heat exchanger 14 and the high pressure side main service valve 27 to determine whether to supply the refrigerant to the high pressure side service valve 22, and The low pressure side main service valve 28 is installed in the inlet pipe of the compressor 12 and determines whether to circulate the refrigerant introduced through the low pressure side service valve 24.

2 is a perspective view showing the outdoor unit of the multi-type air conditioner according to the prior art, Figure 3 is a perspective view showing the service valve structure of the multi-type air conditioner according to the prior art, Figure 4 is a multi-type air conditioner according to the prior art Is a perspective view of the service valve support of the machine.

2 and 3, the outdoor unit 10 includes a cabinet 18 having a suction port 19 and a discharge port formed therein, and one side of the cabinet 18 being cut to form a square hole. The service valve support 36 to which the service valve 20 is installed is installed.

The service valve support 36 is formed in the shape of a long panel in the vertical direction is installed on the inside of the square hole, the stepped in the vertical direction (not shown) is formed so that the high-pressure side service valve 22 is vertical on one side A plurality of first holes (not shown) are formed in a row in a direction, and a plurality of second holes (not shown) are installed in a row in the vertical direction on the other side of the low pressure side service valve 24. ) Is formed.

Looking at the operation of the air conditioner according to the prior art configured as described above are as follows.

First, when power is applied, the compressor 12 is driven to start the circulation of the refrigerant, and the refrigerant is converted into a refrigerant having a low temperature and a low pressure while passing through the outdoor side heat exchanger 14 and the expansion valve 16 and thus the high pressure side. The air is supplied to each indoor unit 40 through the main service valve 27 and the high pressure side service valve 22, and is heat exchanged with the indoor air in the indoor heat exchanger 42 to perform an air conditioning operation.

The refrigerant is circulated along the refrigerant pipe 30 through the low pressure side service valve 24, through the low pressure side main service valve 28, and then introduced to the compressor 12.

When performing the pump-down operation for the previous installation, repair, or replacement of the air conditioner, the cabinet 18 is dismantled, the high pressure side main service valve 27 is closed, and the compressor 12 is driven to operate the refrigerant. Are all pumped to the outdoor unit 10, and then the low pressure side main service valve 28 is locked to perform a pump down operation.

However, the service valve structure of the multi-type air conditioner according to the prior art dismantles the cabinet 18 when the pump-down operation is performed because the main service valve 26 is installed inside the cabinet 18 of the outdoor unit 10. After the operation of the main service valve 26 is possible, there is a problem that the previous installation, repair, replacement of the air conditioner is not easy.

The present invention has been made to solve the above-mentioned problems of the prior art, the main service valve that can control a plurality of service valves all in one operation is installed on the outer wall of the outdoor unit, it is possible to install the multi-type air conditioner It is an object of the present invention to provide a service valve structure of a multi-type air conditioner that can perform work without dismantling the cabinet of the outdoor unit when the repair and replacement work are performed, thereby reducing the time and cost required for the work.

1 is a block diagram showing a multi-type air conditioner according to the prior art,

2 is a perspective view showing an outdoor unit of a multi-type air conditioner according to the prior art,

3 is a perspective view showing an outdoor unit of the multi-type air conditioner according to the present invention;

4 is a detailed view of portion A shown in FIG.

5 is a block diagram showing a multi-type air conditioner according to the present invention,

6 is a perspective view showing a service valve support of the multi-type air conditioner according to the present invention.

<Explanation of symbols on main parts of the drawings>

50: outdoor unit 52: compressor

54: outdoor side heat exchanger 56: expansion valve

58: cabinet 60: service valve

62: high pressure side service valve 64: low pressure side service valve

66: main service valve 67: high pressure side main service valve

68: low pressure side main service valve 70: refrigerant pipe

72: branch pipe 76: service valve support

77 high pressure side valve hole 78 low pressure side valve hole

79: step 79a: main service valve hole

80: indoor unit 82: indoor side heat exchanger

The service valve structure of the multi-type air conditioner according to the present invention for solving the above problems is a compressor for compressing the refrigerant to a high temperature, high pressure, an outdoor side heat exchanger for exchanging the refrigerant supplied from the compressor with outdoor air, Multi-type air including a plurality of service valves installed in each of the refrigerant pipes branched so that the refrigerant discharged from the outdoor heat exchanger is supplied to the plurality of indoor units and fixed to the outer wall of the outdoor unit to determine whether to supply the refrigerant to each indoor unit. In the conditioner, the outer wall of the outdoor unit is characterized in that the main service valve is installed to open and close the plurality of the service valve at the same time in one operation.

Hereinafter, an embodiment of a service valve structure of a multi-type air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

5 is a block diagram showing a multi-type air conditioner according to the present invention.

As shown in FIG. 5, the multi-type air conditioner according to the present invention includes one outdoor unit 50 and a plurality of indoor units 80, and the outdoor unit 50 and the indoor unit 80 are connected by a refrigerant pipe 70. do.

Here, the outdoor unit 50 may include a compressor 52 for compressing a refrigerant at a high temperature and a high pressure, an outdoor side heat exchanger 54 for converting the refrigerant discharged from the compressor 52 into a low temperature, low pressure refrigerant, and a plurality of them. Expansion valves 56 are installed, and high-pressure side service valves 62 are provided on branched branches 72 so that refrigerant is supplied to the plurality of indoor units 80, respectively, to each indoor unit 80. The low pressure side valve 64 is installed on the branch pipe 70 introduced into the outdoor unit 50 so as to determine whether to supply the refrigerant, and to determine whether the refrigerant recovered from the indoor unit 80 is circulated.

In addition, the refrigerant pipe 70 before the refrigerant pipe 70 is branched so that one side thereof protrudes to the outer wall of the outdoor unit 50, and the high pressure side main service valve 67 and the low pressure at each protruding portion thereof. The side main service valve 68 is installed and mounted on the outer wall of the outdoor unit 50.

Figure 3 is a perspective view of the outdoor unit of the multi-type air conditioner according to the present invention, Figure 4 is a detailed view of the portion A shown in Figure 3, Figure 6 is a service valve support of the multi-type air conditioner according to the present invention is shown Perspective view.

6 and 7, the outdoor unit 50 is provided with a cabinet 58 having a suction port 59 and a discharge port, and installed inside the suction port 59 to forcibly suck outdoor air to heat the outdoor heat exchanger. A blower (not shown) to supply to the 54 is configured to include, one side of the cabinet 58 is cut to form a square hole, the service valve support 76 is installed in the square hole to the service valve The support 76 is provided with a plurality of pairs of service valves 60 and a pair of main service valves 66.

As a result, the service valve 60 may be individually operated to individually control the plurality of indoor units 80 connected to one outdoor unit 50, and the refrigerant supplied to all indoor units 80 may be controlled by the main service valve. By 66, it can supply or cut off simultaneously.

The service valve support is formed in the shape of a long panel in the vertical direction, as shown in Figure 8, the stepped 79 is formed in the vertical direction so that one side of the high-pressure side service valve 62 is formed in a row First holes 77 are formed, and on the other side, a plurality of second holes 78 in which the low pressure side service valves 64 are arranged in a row is formed.

In addition, a pair of third holes 79a are formed at the lower side of the step 79 so that the main service valve 66 may be installed in a direction perpendicular to the surface generated by the step 79.

As a result, the main service valve 66 can be operated once without dismantling the cabinet 58 to open and close all the service valves 60, so that the refrigerant supply to the indoor unit can be easily cut off when the pump-down operation is performed. have.

Looking at the operation of the multi-type air conditioner according to the present invention configured as described above are as follows.

First, when power is applied, the compressor 52 is driven to start circulation of the refrigerant, and the refrigerant passes through the outdoor heat exchanger 54, the high pressure side main service valve 67, and the expansion valve 56. And a low pressure liquid refrigerant, which is supplied to the plurality of indoor units 80 through each of the high pressure side service valves 62 and heat exchanged with indoor air while passing through the indoor side heat exchanger 82. And air conditioning is performed.

Thereafter, the refrigerant circulates through each of the low pressure side service valves 64 and passes through the low pressure side main service valves 68 to the compressor 52.

When the air conditioner is installed or repaired or replaced, the high pressure side main service valve 67 is closed to easily shut off the supply of refrigerant to the plurality of indoor units 80, and the compressor 52 is driven to operate the refrigerant. After pumping all to the outdoor unit 50, the low pressure side main service valve 68 can be closed to perform the pump-down operation without removing the cabinet 58.

The service valve structure of the multi-type air conditioner according to the present invention configured as described above has a main service valve installed on one side of the outer wall of the outdoor unit, so that the main service valve can be operated without dismantling the cabinet. Downtime can be easily performed, reducing the time and cost of prior installation, repair and replacement of the air conditioner.

Claims (5)

A compressor for compressing the refrigerant to a high temperature and a high pressure; An outdoor side heat exchanger configured to heat exchange refrigerant supplied from the compressor with outdoor air; The multi-type valve includes a plurality of service valves installed in each of the refrigerant pipes branched to supply the plurality of indoor units with the refrigerant discharged from the outdoor side heat exchanger, and fixed to the outer wall of the outdoor unit to determine whether to supply the refrigerant to each indoor unit In an air conditioner; A service valve structure of a multi-type air conditioner, wherein a main service valve is installed at one side of the outer wall of the outdoor unit to simultaneously open and close a plurality of the service valves with a single operation. The method of claim 1, The service valve structure of the multi-type air conditioner, characterized in that the service valve support on which the service valve and the main service valve is mounted on one side of the outdoor unit. The method of claim 1, The service valve and the main service valve of the multi-type air conditioner, characterized in that the high-pressure valve is installed in the refrigerant pipe discharged from the outdoor unit and the low pressure side valve is installed in the refrigerant pipe flowing into the outdoor unit Service valve structure. The method of claim 2, The service valve support is provided with a plurality of first holes in which the high pressure side service valve is installed in a vertical direction on one side, and the low pressure side service valve is installed in a vertical direction on the other side. A plurality of second holes are formed, the service valve structure of the multi-type air conditioner, characterized in that a pair of third holes are formed in the lower side is installed the main service valve. The method according to claim 2 or 4, The service valve support is a service valve structure of a multi-type air conditioner, characterized in that the first hole is formed and the second hole is formed in the partition portion formed, the step is formed.