CN100516695C - Anti-freezing device for drain water of outdoor unit of air conditioner - Google Patents

Abstract

The present invention discloses a device capable of preventing discharged water from icing for outdoor machine of air conditioner. It includes the following components: gas-liquid separator and compressor placed in the interior of machine shell, outdoor heat exchanger placed along its peripheral edge, downwards recessed dewatering channel set along the side face of heat exchanger on the baseplate and several dewatering holes set on said dewatering channel. Said invention can smoothly discharge water and can prevent the discharged water from icing.

Description

Anti-freezing device for drain water of outdoor unit of air conditioner

technical field

The invention relates to an air conditioner, in particular to a device for preventing drainage from freezing of an outdoor unit of the air conditioner. During the heating operation of the air conditioner in winter, when the defrosting operation is performed to defrost the outdoor heat exchanger, the defrosting water generated after defrosting flows along the drainage channel on the chassis and passes through the drain channel set on the bottom surface of the channel. However, because the outside temperature is too low, the defrosting water starts to freeze, and the ice blocks the drain hole, and the amount of ice is increasing. Therefore, the present invention is specifically about preventing the above phenomenon from happening outside the air conditioner. Machine anti-drainage freezing device.

Background technique

Generally, air conditioners are roughly divided into integrated air conditioners and split air conditioners. Recently, due to the market's higher and higher requirements for the cooling capacity of split-type air conditioners, large-scale air conditioners are equipped with several compressors on the outdoor unit, effectively corresponding to various cooling requirements.

Next, an outdoor unit of a conventional air conditioner will be described with reference to the accompanying drawings.

Fig. 1 is a perspective view of an open front of an outdoor unit of an air conditioner in the prior art, and Fig. 2 is a cross-sectional view of the drainage channel structure of an outdoor unit of an air conditioner in the prior art.

As shown in the figure, the outdoor unit of an air conditioner in the past includes: a right-angled hexahedron casing 110 with a storage space inside and an opening structure on the side; a shared gas-liquid separator 120 and several compressors 130 arranged inside the casing 110; The outdoor heat exchanger 140 is located at the inner periphery of the casing 110 .

The casing 110 includes: a chassis 111 arranged at the bottom of the casing 110 in a square structure, supporting the gas-liquid separator 120, the compressor 130, and the outdoor heat exchanger 140; Square structure, keeping a certain distance; between the chassis 111 and the top plate 115, several supporting frames 114 are arranged.

An opening structure is provided on the top plate 115 through the plate surface, and a plurality of blowing fans 150 are respectively arranged in each opening area to send air to the outside, thereby promoting heat exchange by the outdoor heat exchanger 140 .

Each outdoor heat exchanger 140 is arranged on the chassis 111 along each side and the outer periphery of the rear, and a pair of compressors 130 and a common gas-liquid supply for each compressor 130 are installed inside the outdoor heat exchanger 140. Separator 120.

Moreover, along the side of the outdoor heat exchanger 140, there is a drainage channel 112 formed into a groove by pressure, and when the defrosting operation is performed, the defrosting water that melts and drops on the outdoor heat exchanger is discharged, or flows into the casing. Snow water or rainwater inside 110, and several drainage holes 113 running through the bottom surface of the drainage channel 112. The water inside is discharged to the outside through the drain hole 113 .

When the conventional air conditioner configured as above performs heating operation, the high-temperature and high-pressure refrigerant flowing out after heating by the indoor unit (not shown in the figure) passes through the outdoor expansion valve (not shown in the figure) of the outdoor unit 100. Afterwards, it decompresses and expands, and enters the interior of the outdoor heat exchanger 140, and the low-temperature liquid refrigerant flowing into the interior of the outdoor heat exchanger 140 exchanges heat with the low-temperature outdoor air flowing into the casing under the action of the fan. And absorb heat, become a low-temperature gaseous refrigerant. Then, after the gas-liquid separation of the low-temperature gaseous refrigerant in the common gas-liquid separator 120, it flows into each compressor 130 in a pure gas state and is compressed, so that the high-temperature gaseous refrigerant circulates repeatedly in the indoor unit (not shown in the figure). out).

During the heating operation of this kind of air conditioner, the moisture in the outdoor air will frost on the surface of the outdoor heat exchanger 140, thereby reducing the heat exchange efficiency of the outdoor heat exchanger. The defrosting operation removes frost on the surface of the outdoor heat exchanger 140 .

At this time, the frost water generated on the surface of the outdoor heat exchanger 140 will flow into the recessed drainage passage 112 provided on the side of the outdoor heat exchanger 140, and be discharged to the bottom of the outdoor unit 100 through the drainage hole 113 running through the bottom surface of the drainage passage 112. external.

However, when the outdoor air temperature drops below 5-7°C in winter, the residual defrosting water passing through the vicinity of the drain hole 113 will start to freeze, and eventually block the drain hole 113, so the defrosting generated in the subsequent defrosting operation Water just can't be discharged normally, and the amount of ice around the drain hole 113 will be more and more, and finally cover the bottom of the outdoor heat exchanger.

Contents of the invention

The technical problem to be solved by the present invention is to provide a drainage freezing prevention device for an outdoor unit of an air conditioner, which can smoothly discharge defrosting water generated during defrosting operation through drainage channels and drainage holes.

The technical scheme adopted in the present invention is: including setting the gas-liquid separator and the compressor in the casing, and setting the outdoor heat exchanger along the outer surface of the gas-liquid separator and the compressor, on the chassis, along the outdoor heat exchange The side of the device is provided with a downwardly concave drainage channel, and a number of drainage holes are set on the drainage channel through the bottom surface. high temperature refrigerant.

Both ends of the above-mentioned plate-shaped passage are connected to a compressor discharge pipe and a gas-liquid separator suction pipe.

Both ends of the plate-shaped channel are connected to the suction pipe of the subcooling end of the outdoor heat exchanger and the output pipe of the outdoor heat exchanger.

On-off valves are provided on each connecting pipe of the above-mentioned connecting plate-shaped channel.

To sum up, the beneficial effect of the present invention is that in the present invention, a part of the high-temperature refrigerant flowing from the indoor unit into the subcooling end of the outdoor heat exchanger flows in the anti-freezing piping of the drain that is arranged along the drain passage, thereby preventing It prevents the freezing of the drainage, and the drainage can be carried out smoothly.

Description of drawings

Fig. 1 is the oblique view of the open front of the air conditioner outdoor unit of prior art,

Fig. 2 is the cross-sectional view of the drainage channel structure of the outdoor unit of the air conditioner in the prior art,

Fig. 3 is a partial enlarged oblique view of the drainage passage section of the outdoor unit of the air conditioner in the past,

Fig. 4 is the oblique view of the open front of the device for preventing the drainage from freezing of the outdoor unit of the air conditioner of the present invention,

Fig. 5 is a perspective view of the chassis of the outdoor unit of the air conditioner of the present invention,

Fig. 6 is a plan view of the pipe joint state of the anti-freezing device for the outdoor unit of the air conditioner in the embodiment of the present invention,

Fig. 7 is a plan view of a pipe connection state of an anti-freezing device for an outdoor unit of an air conditioner according to another embodiment of the present invention.

In the picture:

1: Outdoor unit 10: Chassis

11: Chassis 12: Drainage channel

13: drain hole 14: plate-shaped channel

15: Stacked plate 16, 17: Connecting piping

18: Suction piping 19: Compressor output piping

20: Shared gas-liquid separator 21, 22: Switch valve

30: compressor 40: outdoor heat exchanger

41: Subcooling end suction piping 42: Subcooling end output piping

43: Suction piping 44: Output piping of the outdoor heat exchanger

60: side

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment: Fig. 4 is the oblique view of the open front of the outdoor unit of the air conditioner of the anti-drain freezing device of the present invention, Fig. 5 is the oblique view of the chassis of the outdoor unit of the air conditioner of the present invention Fig. 6 is a plan view of the pipe joint state of the anti-freezing device for the outdoor unit of the air conditioner in an embodiment of the present invention.

As shown in the figure, the outdoor unit 1 of the air conditioner of the present invention includes: a rectangular hexahedron-shaped casing 10 with an internally formed accommodation space and an open structure on the side; a gas-liquid separator 20 is arranged inside the casing 10 to cool the refrigerant Gas-liquid separation; several compressors 30 for compressing the refrigerant separated by the gas-liquid separator; an outdoor heat exchanger 40 is arranged in the opening area of the casing 10 to exchange heat with the refrigerant inside.

The casing 10 includes: the chassis 11 adopts a square structure, is arranged at the bottom of the casing 10, supports the gas-liquid separator 20, the compressor 30 and the outdoor heat exchanger 40, etc.; The top plate 115 above the shell 10; several support frames 114 are arranged between the chassis 11 and the top plate 115.

An opening structure is provided on the top plate 115 through the plate surface, and a plurality of blowing fans 50 are respectively arranged in each opening area, and the outdoor heat exchanger 40 exchanges heat by sending air to the outside.

On the chassis 11, each outdoor heat exchanger 40 is arranged along the two sides 60 and the outer periphery of the rear, and a pair of compressors 30 are arranged at the center of the outdoor heat exchanger 40 and each compressor 30 is provided with a gaseous state. A common gas-liquid separator 20 for the refrigerant.

Moreover, along the side of the outdoor heat exchanger 40, there is provided a drainage channel 12 that is pressurized and formed into a groove. Snow water or rainwater inside, and several drainage holes 13 running through the bottom surface of the drainage channel 12 .

When the air conditioner is in heating operation in winter, in order to prevent the outdoor heat exchanger 40 from defrosting operation, the defrosting water is being discharged, and the drainage channel is affected by the low temperature outside and freezes, and a plate-shaped channel is provided. 14. Detour a part of the high-temperature refrigerant output from the compressor 30, thereby preventing the drain water from freezing.

The plate-shaped channel 14 is formed on the bottom surface or the upper surface of the drainage channel 12 by pressing or welding. The plate-shaped channel 14 formed by stacked plates 15 that can be stacked at a certain interval is arranged, thereby making the detoured high-temperature refrigerant Flow along the plate-shaped channel 14 to prevent the drain from freezing in the drain channel 12 and the drain hole 13.

One end of the plate-shaped passage 14 is connected to the output pipe 19 of the compressor, thereby bypassing a part of the high-temperature refrigerant compressed and output by the compressor 30, and the other end is connected to the suction pipe 18 of the common gas-liquid separator 20. The respective connecting pipes 16, 17.

On the connecting pipe 16 connected to the output pipe 19 of the compressor 30 , an on-off valve for controlling the amount of refrigerant that detours through the plate-shaped passage 14 is provided. The switch valve is a two-way switch valve.

Next, technical effects of the device for preventing freezing of drain water of an outdoor unit of an air conditioner according to the present invention constituted as above will be described.

When the air conditioner performs heating operation, when the indoor unit (not shown in the figure) is performing heating, the high-temperature and high-pressure refrigerant flowing out passes through the outdoor expansion valve (not shown in the figure) of the outdoor unit 1, and then decompresses and expands. , through the distributor of the outdoor heat exchanger 40, the low-temperature liquid refrigerant flowing into each refrigerant pipe is under the action of the blowing fan 50, exchanges heat with the outdoor air in a low-temperature state flowing into the casing 1, and absorbs heat. into a low-temperature gaseous refrigerant. Then, after the low-temperature gaseous refrigerant is separated into gas and liquid in the common gas-liquid separator 20, it flows into each compressor 30 in a pure gas state and is compressed, and then is output to the indoor unit (not shown in the figure) along the compressor output pipe 19. out) inside.

At this time, under the action of the fan 50, the outdoor air flowing into the cabinet 10 exchanges heat with the outdoor heat exchanger 40, thereby forming frost on the surface of the outdoor heat exchanger 40, thereby lowering the temperature of the outdoor heat exchanger 40. Therefore, in order to clear the frost on the surface of the outdoor heat exchanger 40, the defrosting operation is performed at regular intervals.

However, when the outdoor air temperature drops below 5-7°C, the drain water flows along the drain channel 12 and starts to freeze during the process of being discharged from the drain hole 13. As a result, the drain hole 13 is blocked, and ice accumulation occurs.

Therefore, in the present invention, a plate-shaped channel 14 is provided along the bottom surface of the drain channel 12, and a part of the high-temperature refrigerant outputted by the compressor after being compressed is detoured to the suction pipe 18 of the common gas-liquid separator 20 by using the plate-shaped channel 14 In this way, the freezing of the drain water is prevented.

And, as shown in Figure 7, in another embodiment of the present invention, in the anti-freezing structure of the drainage of the outdoor unit of the air conditioner, one end is provided inside the plate-shaped passage 14 formed along the bottom surface of the drainage passage of the chassis 11 to connect to the outside. The subcooling end of the heat exchanger 40 sucks into the pipe 41, so that during the heating operation, part of the high-temperature refrigerant flowing from the indoor unit into the subcooling end of the outdoor heat exchanger 40 is detoured and flows in the channel, or during the defrosting operation, A part of the refrigerant compressed by the compressor and flowed into the outdoor heat exchanger 40 flows in the passage, and the other ends are connected to the connection pipes 16 and 17 of the output pipe 44 of the outdoor heat exchanger 40 .

The connecting pipes 16, 17 are provided with on-off valves 21, 22 for adjusting and controlling the detoured high-temperature refrigerant during heating or defrosting operation, respectively.

In the drawings, reference numeral 42 denotes a subcooling end output pipe of the outdoor heat exchanger, and 43 denotes a suction pipe of the outdoor heat exchanger.

In the anti-freezing structure of the outdoor unit of the air conditioner in another embodiment of the present invention having the above-mentioned structure, during the heating operation, the water flowing into the subcooling end of the outdoor heat exchanger 40 from the indoor unit (not shown in the figure) A part of the refrigerant whose temperature is at least in the range of 20 to 30°C detours to the output pipe of the outdoor heat exchanger 40 along the plate-shaped channel 14 formed on the bottom surface of the drain channel 12 , thereby flowing into the defrosting water and the inside of the casing 10 When the rainwater or snowwater etc. are discharged, it is prevented from freezing due to the influence of the lower external temperature.

In addition, during the defrosting operation, part of the high-temperature refrigerant that flows along the suction pipe of the outdoor heat exchanger 40 (that is, the output pipe of the outdoor heat exchanger during the heating operation) and is compressed in each compressor 30 , detour along the plate-shaped channel 14 into the supercooled end, thereby preventing the defrosting water from freezing.

By setting the plate-shaped channel 14 on the bottom surface of the drain channel 12, a part of the high-temperature refrigerant flowing into the outdoor heat exchanger 40 directly contacts the bottom surface of the drain channel 12, thereby preventing the drain from freezing and draining smoothly.

Claims (4)

1. an air-conditioner outdoor unit prevents the draining device that freezes, comprise the gas-liquid separator (20) and the compressor (30) that are provided with in the casing (10), with the outdoor heat converter (40) that is provided with along the lateral surface of gas-liquid separator (20) and compressor (30), on chassis (11), side along outdoor heat converter (40) is provided with recessed drainage channel (12) downwards, and several osculums that run through the bottom surface (13) are set on drainage channel (12), it is characterized in that, (11) are gone up and along drainage channel (12) plate shape passage (14) are set on the chassis, the high temperature refrigerant on circuitous a part of inflow outdoor heat exchanger (40).

Air-conditioner outdoor unit according to claim 1 prevent the draining device that freezes, it is characterized in that the two ends of plate shape passage (14) are connected with the suction pipe arrangement (18) of compressor (30) output pipe arrangement (19) and gas-liquid separator (20).

3. air-conditioner outdoor unit according to claim 1 prevents the draining device that freezes, it is characterized in that the two ends of plate shape passage (14) cross the suction pipe arrangement (41) of cold junction with outdoor heat converter (40) and the output pipe arrangement (44) of outdoor heat converter (40) is connected.

According to claim 2 or 3 described air-conditioner outdoor units prevent the draining device that freezes, it is characterized in that each connecting pipings of connecting plate shape passage (14) is provided with controlled valve (21,22).

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