KR100624789B1 - Air conditioner - Google Patents

Abstract

 The air conditioner according to the present invention is equipped with a valve means on the suction flow path and the discharge flow path of the compressor, it is possible to quickly discharge the refrigerant in the failed compressor when the compressor breaks, so the replacement operation of the compressor is simple, replacement time is shortened In addition, it is possible to prevent the loss of the refrigerant because it is not necessary to discharge all the refrigerant of the entire system.

Air Conditioner, Compressor, Replacement, Refrigerant, Valve Means, Service Valve, Valve

Description

Air Conditioner             

1 is a configuration diagram schematically showing an air conditioner according to the prior art,

2 is a schematic view showing an air conditioner according to the present invention.

<Explanation of symbols on main parts of the drawings>

51: first compressor 52: second compressor

53: shared accumulator 54: indoor heat exchanger

55: outdoor heat exchanger 56: expansion mechanism

57: four-way valve 61: the first suction passage

62: second suction passage 63: first discharge passage

64: second discharge passage 65: third discharge passage

66: fungal oil tube 67: the first oil separator

68: second oil separator 69: first oil recovery pipe

70: second oil return pipe 71: first service valve

72: second service valve 73: first opening and closing valve

74: second opening and closing valve 75: oil oil opening and closing valve

The present invention relates to an air conditioner, in particular, by mounting the valve means on the suction and discharge flow path of the compressor, it is possible to quickly discharge the refrigerant in the failed compressor when the compressor breaks down, so the replacement operation of the compressor is simple, replacement time This relates to an air conditioner which can be shortened.

In general, an air conditioner is a device that cools or heats a room in order to create a more comfortable indoor environment. The air conditioner sucks indoor air and heats or cools it to discharge the room.

1 is a configuration diagram schematically showing an air conditioner according to the prior art.

The air conditioner according to the prior art, as shown in Figure 1, the compressor (2) (4) for compressing the refrigerant of the low-temperature low-pressure gas state to high temperature and high pressure, and the refrigerant discharged from the compressor (2) (4) A condenser for condensation (an indoor heat exchanger 6 for heating, an outdoor heat exchanger 8 for cooling), an expansion mechanism 10 for expanding a liquid refrigerant condensed by the condenser, and the expansion mechanism 10 An evaporator (an outdoor heat exchanger (8) for heating, an indoor heat exchanger (6) for cooling) for evaporating the refrigerant introduced therefrom, and a four-way valve (12) for switching the flow of the refrigerant according to cooling or heating operation. It is configured by.

The compressor consists of two first and second compressors (2) and (4), the first and second compressors (2) and (4) are connected by a common accumulator 14, the common accumulator 14 ) Is connected to the first and second suction passages 16 and 18 provided in the first and second compressors 2 and 4, respectively.

In addition, the first and second compressors (2) and (4) are oil so that the oil pipe 20 is interconnected to the lower side thereof so that the oil of any one of the first and second compressors (2) and (4) is not short. Adjust the amount.

In addition, each of the first and second compressors 2 and 4 is connected to the first and second discharge passages 21 and 22 through which the gas refrigerant compressed at high temperature and high pressure is discharged. The first and second oil separators 23 and 24 which separate the discharged refrigerant and the oil are respectively attached to the 21 and 22.

The first and second oil separators 23 and 24 suck oil separated from the first and second oil separators 23 and 24 into the first and second suctions of the first and second compressors 2 and 4. First and second oil recovery pipes 26 and 28 leading to the flow paths 16 and 18 are connected.

The first and second discharge passages 21 and 22 are laminated to the third discharge passage 30 which guides the discharged refrigerant to the four-way valve 12.

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

First, in the cooling operation, as shown in FIG. 1, the high temperature and high pressure refrigerant from the first and second compressors 2 and 4 is transferred to the outdoor heat exchanger 8 by the four-way valve 12. The refrigerant passing through the outdoor heat exchanger (8) is condensed into the liquid refrigerant in a gaseous state of high temperature and high pressure by heat exchange with ambient air, and then sent to the expansion mechanism (10).

Thereafter, the refrigerant is expanded into the low-temperature, low-pressure two-phase refrigerant while passing through the expansion mechanism (10), and then flows into the indoor heat exchanger (6), and evaporates to a gas state while passing through the indoor heat exchanger (6). While absorbing ambient heat, the surroundings of the indoor heat exchanger 6 are cooled.

The refrigerant passing through the indoor heat exchanger (6) flows into the common accumulator (14) by the four-way valve (12), and the liquid refrigerant in the refrigerant flows in the common accumulator (14). The refrigerant in the gas phase is circulated to the first and second compressors 2 and 4.

Meanwhile, when the refrigerant is discharged through the first and second discharge passages 21 and 22 when the first and second compressors 2 and 4 operate, the first and second compressors 23 and 24 discharge the refrigerant. The refrigerant and oil are separated.

The oil separated in the first and second oil separators 23 and 24 may be recovered into the first and second suction passages 16 and 18 through the first and second oil recovery pipes 26 and 28. do.

On the other hand, during the heating operation, the flow path is switched in the four-way valve 12, and the refrigerant discharged from the first and second compressors 2 and 4 passes through the four-way valve 12, the indoor heat exchanger 6, and the expansion. After passing through the mechanism 10, the outdoor heat exchanger 8, and the four-way valve 12 in order, the common accumulator 14 is circulated.

However, the air conditioner according to the prior art has to be replaced with a new compressor if any one of the plurality of compressors fails, and after replacing all the refrigerant circulating in the air conditioner to the outside, the compressor must be replaced. Therefore, there is a problem that replacement is difficult and takes a long time to replace.

The present invention has been made to solve the problems of the prior art, it is an object of the present invention to provide an air conditioner that can be replaced by a simple replacement operation of the compressor when the compressor failure.

The air conditioner according to the present invention for solving the above problems is a plurality of compressors for compressing the refrigerant, a common accumulator connected to the suction pipe of each of the plurality of compressors, connected to the discharge pipe of each of the plurality of compressors to condense the refrigerant A condenser to expand, an expansion mechanism to expand the refrigerant discharged from the condenser, an evaporator to evaporate the refrigerant passing through the expansion mechanism, and a suction tube and a discharge tube of the plurality of compressors, respectively. It characterized in that it comprises a valve means for blocking the refrigerant flow to the compressor when replacing one compressor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram schematically showing an air conditioner according to the present invention.

As shown in FIG. 2, the air conditioner according to the present invention includes a plurality of compressors 51 and 52 for compressing a refrigerant, and a common accumulator connected to a suction channel of each of the plurality of compressors 51 and 52. 53) and a condenser connected to discharge paths of each of the plurality of compressors 51 and 52 to condense the refrigerant (indoor heat exchanger 54 when heated, and outdoor heat exchanger 55 when cooled); An expansion mechanism 56 for expanding the refrigerant discharged from the condenser and an evaporator for evaporating the refrigerant passing through the expansion mechanism 56 (an outdoor heat exchanger 55 for heating and an indoor heat exchanger 54 for cooling). And four-way valves 57 for switching the refrigerant flow in accordance with cooling or heating operations, and suction and discharge passages of the plurality of compressors 51 and 52, respectively. 52), the refrigerant flow to the compressor when the compressor of any one of the It is configured to include a valve means.

The plurality of compressors include first and second compressors 51 and 52, and first and second suction passages 61 and 62 so that refrigerant is sucked into one side of the first and second compressors 51 and 52. ) Are connected to each other, and the first and second discharge passages 63 and 64 are connected to the other side so that the compressed refrigerant is discharged.

The common accumulator 53 is connected to the first and second suction passages 61 and 62, and the first and second discharge passages 63 and 64 guide the discharged refrigerant to the four-way valve 57. To be discharged to the third discharge passage 65.

In addition, the first and second compressors 51 and 52 are interconnected with a fungal oil pipe 66 for adjusting the oil amount so that the oil of any one compressor is not insufficient. It is connected to the lower side of the first and second compressors 51 and 52.

On the other hand, the valve means are mounted on the first and second suction passages 61 and 62 and the first and second discharge passages 63 and 64 of the first and second compressors 51 and 52, respectively, First and second service valves 71 and 72 mounted on the first and second suction inflow passages 61 and 62, respectively, and mounted to the first and second service valves 71 and 72 and the first and second discharge passages 63 and 64, respectively. It consists of two opening-closing valves 73 and 74, and the milking oil pipe opening / closing valve 75 attached to the said milking milk pipe 66.

The first and second service valves 71 and 72 shield the first and second suction flow paths 61 and 62 to provide a connection between the common accumulator 53 and the first and second compressors 51 and 52. Three-way valve to block the refrigerant circulation and to discharge the refrigerant remaining in the first and second suction passages 61 and 62 and the first and second compressors 51 and 52 to the outside and to perform a vacuum operation. Is made of.

That is, the first and second service valves 71 and 72 include three-way valves having first, second and third valve ports (not shown) arranged in three directions, and the first and second valve ports (not shown). The first and second suction passages 61 and 62 communicate with each other to shield the first and second suction passages 61 and 62 when the compressor is replaced, and the third valve port (not shown) provides a refrigerant. It is configured for use when discharging to the outside.

On the other hand, the first and second discharge passages 63 and 64 are equipped with first and second oil separators 67 and 68 for separating the discharged refrigerant and oil, respectively.

First and second oil separators 67 and 68 guide oil separated from the first and second oil separators 67 and 68 to the first and second suction passages 61 and 62. , 2 oil recovery pipe 69, 70 is connected.

Meanwhile, in the above embodiment, the first and second service valves 71 and 72 are limited to the first and second suction passages 61 and 62, respectively, but are not limited to the above embodiments. The first and second opening and closing valves 73 and 74 are mounted on the first and second suction passages 61 and 62, and the first and the second service valves are installed on the first and second discharge passages 63 and 64. It is also possible to mount 71) 72.

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

After the high temperature and high pressure refrigerant from the first and second compressors 51 and 52 is discharged through the first and second discharge passages 63 and 64, the first and second oil separators 67 and ( 68), refrigerant and oil are separated.

The oil separated in the first and second oil separators 67 and 68 is recovered into the first and second suction passages 61 and 62 through the first and second oil recovery pipes 69 and 70. The separated refrigerant is sent to the outdoor heat exchanger 55 by the four-way valve 57 through the third discharge passage 65.

The refrigerant passing through the outdoor heat exchanger 55 is condensed into a liquid refrigerant in a gaseous state of high temperature and high pressure by heat exchange with surrounding air, and then flows into the expansion mechanism 56.

The refrigerant introduced into the expansion mechanism (56) is expanded into a low-temperature, low pressure two-phase refrigerant while passing through the expansion mechanism (56) and flows into the indoor heat exchanger (54), and the indoor heat exchanger (54) As it passes through, it evaporates to a gaseous state to absorb the surrounding heat, thereby cooling the indoor air.

The refrigerant passing through the indoor heat exchanger 54 is introduced into the common accumulator 53 by the four-way valve 57 and then circulated to the first and second compressors 51 and 52.

Meanwhile, a failure may occur in the compressor of any one of the first and second compressors 51 and 52, and the first compressor 51 will be described as a failure.

If the first compressor 51 fails, the first service valve 71 and the first opening / closing valve 73 are closed to shield the first suction passage 61 and the first discharge passage 63. In addition, the fungal oil tube opening and closing valve 75 is closed to shield the fungal milk tube 66.

Thereafter, the refrigerant inside the first compressor 51 is removed through a third valve port (not shown) of the first service valve 71, and then the first compressor 51 is separated.

After removing the failed first compressor (51), replacing and installing a new compressor, performing a vacuum operation through a third valve port (not shown) of the first service valve 71, the first service The valve 71, the first opening / closing valve 73, and the oil equalizing pipe valve 75 can be opened to operate a new compressor.

Therefore, if any one of the plurality of compressors fails, it is possible to replace the new compressor after discharging only the refrigerant around the failed compressor through the valve means installed around the failed compressor. It can be shortened.

The air conditioner according to the present invention configured as described above is equipped with a valve means on the suction and discharge flow path of the compressor, it is possible to quickly discharge the refrigerant in the failed compressor when the compressor breaks down, it is easy to replace the compressor, Not only can the replacement time be shortened, but there is no need to exhaust all the refrigerant of the entire system, thereby preventing the loss of the refrigerant.                     

In addition, by installing a service valve consisting of a three-way valve on the suction flow path of the compressor, it is possible to shut off the suction flow path, and to easily discharge the refrigerant and to perform a vacuum operation after replacing the new compressor.

Claims (5)

A plurality of compressors for compressing the refrigerant; A common accumulator connected to a suction channel of each of the plurality of compressors; A condenser connected to discharge paths of the plurality of compressors to condense the refrigerant; An expansion mechanism for expanding the refrigerant discharged from the condenser; An evaporator for evaporating the refrigerant passing through the expansion mechanism; And a valve means mounted to suction and discharge channels of the plurality of compressors, respectively, to shut off the flow of refrigerant to the compressor when replacing one of the plurality of compressors. The method of claim 1, The valve means is provided in one of the suction flow path and the discharge flow path, the service valve for blocking the circulation of the refrigerant and discharge the internal refrigerant to the outside, and the other is provided with an on-off valve for blocking the circulation of the refrigerant Air conditioner characterized by. The method of claim 2, The service valve is an air conditioner, characterized in that the three-way valve. The method of claim 3, wherein The plurality of compressors are air conditioners, characterized in that interconnected with a homogeneous oil pipe to adjust the amount of oil so as not to run out of any one compressor. The method of claim 4, wherein The valve means is air conditioner, characterized in that it further comprises a bacteria oil pipe opening and closing valve for opening and closing the bacteria oil pipe is mounted on the bacteria oil pipe.

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