CN221036260U - Heat exchange system and air conditioner with same - Google Patents

Abstract

The utility model discloses a heat exchange system and an air conditioner with the same. The compressor is provided with an exhaust port and an air return port; the four-way valve is provided with a first port, a second port, a third port and a fourth port, and the first port is communicated with the exhaust port; the outdoor heat exchanger is communicated with the second port; one end of the indoor heat exchanger is communicated with the third port; the first pipe is connected to the air return port, the second pipe is connected to the fourth port, the first pipe and the second pipe extend into the heat recovery tank, a connecting pipe is arranged between one end of the outdoor heat exchanger and one end of the indoor heat exchanger, the connecting pipe is provided with a heat exchange part, and the heat exchange part is arranged in the heat recovery tank. According to the heat exchange system provided by the utility model, the supercooling degree of the refrigerant of the heat exchange system is higher, the energy efficiency of the air conditioner is higher, and the problem of liquid impact of the compressor can be avoided.

Description

Heat exchange system and air conditioner with same

Technical Field

The utility model mainly relates to the technical field of air treatment equipment, in particular to a heat exchange system and an air conditioner with the same.

Background

In the related art, in a refrigeration mode, the indoor heat exchanger is all used for evaporation, the outdoor heat exchanger is all used for condensation, the supercooling degree of the air conditioner is only condensed through the outdoor unit, the refrigeration effect is poor, meanwhile, when the refrigerant flowing out of the indoor heat exchanger enters the compressor, liquid refrigerant possibly exists, liquid return of the compressor is caused, and the service life of the compressor is reduced.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a heat exchange system, the supercooling degree of the refrigerant of the heat exchange system is higher, the energy efficiency of the air conditioner is higher, and the problem of liquid impact of the compressor can be avoided.

The utility model also provides an air conditioner which comprises the heat exchange system.

The heat exchange system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger and a regenerative tank. The compressor is provided with an exhaust port and a return air port; the four-way valve has a first port in communication with one of the second port and the third port, a second port in communication with the other of the second port and the third port, a third port in communication with the exhaust port, and a fourth port in communication with the first port; one end of the outdoor heat exchanger is communicated with the second port; one end of the indoor heat exchanger is communicated with the third port; the air return port is connected with a first pipe, the fourth port is connected with a second pipe, one end of the first pipe away from the air return port and one end of the second pipe away from the fourth port extend into the heat recovery tank, a connecting pipe is arranged between one end of the outdoor heat exchanger away from the second port and one end of the indoor heat exchanger away from the third port, the connecting pipe is provided with a heat exchange part, and the heat exchange part is arranged in the heat recovery tank.

According to the heat exchange system provided by the embodiment of the utility model, the heat exchange part is arranged on the connecting pipe, the heat exchange part is arranged in the regenerative tank, the refrigerant with lower temperature entering the regenerative tank from the second pipe can exchange heat with the liquid refrigerant entering the heat exchange part of the connecting pipe from the outdoor heat exchanger, so that the refrigerant in the heat exchange part is supercooled, the supercooling degree of the refrigerant in the heat exchange part can be improved, the refrigerating capacity of the heat exchange system can be improved, and the energy efficiency of the air conditioner is higher. The refrigerant that gets into the heat recovery tank through the second pipe can carry out gas-liquid separation in the heat recovery tank, and the refrigerant that gets into the heat recovery tank through the second pipe can be when the heat transfer with the refrigerant that the outdoor heat exchanger flowed into heat exchange part, produces more gaseous refrigerant for the refrigerant that gets into the return port through the first pipe is gaseous refrigerant, and gaseous refrigerant flows in the compressor through the return port, reduces the back liquid risk of compressor, avoids the compressor to appear the hydraulic shock problem.

In some embodiments of the utility model, the heat exchanging part is formed in a folded line shape or a spiral shape.

In some embodiments of the utility model, the indoor heat exchanger comprises an evaporation section and a supercooling section, one end of the evaporation section is connected with the third port, the other end of the evaporation section is connected with one end of the supercooling section, and the other end of the supercooling section is connected with one end of the connecting pipe, which is far away from the outdoor heat exchanger.

In some embodiments of the utility model, the air conditioner comprises a water pan, the indoor heat exchanger is located above the water pan, the supercooling section is located below the evaporating section, and the supercooling section is located in the water pan.

In some embodiments of the present utility model, during the cooling operation of the air conditioner, the refrigerant on the evaporation section flows from the end of the evaporation section away from the supercooling section to the end of the evaporation section near the supercooling section.

In some embodiments of the present utility model, the indoor heat exchanger includes a plurality of sub heat exchangers, the plurality of sub heat exchangers are arranged along a straight line, angles are formed between any two adjacent heat exchangers, the evaporation section includes a plurality of sub evaporation sections, the supercooling section includes a plurality of sub supercooling sections, and each sub heat exchanger includes one evaporation section and one supercooling section arranged along a length direction of the sub heat exchanger.

In some embodiments of the utility model, a first electronic expansion valve, a first filter and a second filter are arranged on the connecting pipe, the first electronic expansion valve is positioned between the backheating tank and the outdoor heat exchanger, the first filter is positioned between the first electronic expansion valve and the outdoor heat exchanger, and the second filter is positioned between the backheating tank and the first electronic expansion valve.

In some embodiments of the utility model, a second electronic expansion valve, a third filter and a fourth filter are arranged between the supercooling section and the evaporating section, the third filter is arranged between the evaporating section and the second electronic expansion valve, and the fourth filter is arranged between the second electronic expansion valve and the supercooling section.

In some embodiments of the present utility model, a refrigerant heat dissipation coil is further disposed on the connection pipe, and the refrigerant heat dissipation coil is disposed between the first electronic expansion valve and the heat recovery tank.

The air conditioner comprises the heat exchange system.

According to the air conditioner provided by the embodiment of the utility model, the heat exchange part is arranged on the connecting pipe, the heat exchange part is arranged in the heat recovery tank, the refrigerant with lower temperature entering the heat recovery tank from the second pipe can exchange heat with the liquid refrigerant entering the heat exchange part of the connecting pipe from the outdoor heat exchanger, so that the refrigerant in the heat exchange part is supercooled, the supercooling degree of the refrigerant in the heat exchange part can be improved, the refrigerating capacity of the heat exchange system can be improved, and the energy efficiency of the air conditioner is higher. The refrigerant that gets into the heat recovery tank through the second pipe can carry out gas-liquid separation in the heat recovery tank, and the refrigerant that gets into the heat recovery tank through the second pipe can be when the heat transfer with the refrigerant that the outdoor heat exchanger flowed into heat exchange part, produces more gaseous refrigerant for the refrigerant that gets into the return port through the first pipe is gaseous refrigerant, and gaseous refrigerant flows in the compressor through the return port, reduces the back liquid risk of compressor, avoids the compressor to appear the hydraulic shock problem.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a heat exchange system of an air conditioner in a cooling mode according to an embodiment of the present utility model;

fig. 2 is a schematic view of an indoor heat exchanger mated with a drip tray in accordance with an embodiment of the present utility model.

Reference numerals:

100. A heat exchange system;

1. a compressor; 11. an exhaust port; 12. an air return port;

2. a four-way valve; 21. a first port; 22. a second port; 23. a third port; 24. a fourth port;

3. An indoor heat exchanger; 31. a sub heat exchanger; 311. a first heat exchanger; 312. a second heat exchanger; 313. a third heat exchanger; 314. a fourth heat exchanger; 32. an evaporation section; 321. a sub-evaporation section; 33. a supercooling section; 331. a sub-supercooling section; 34. a second electronic expansion valve; 35. a third filter; 36. a fourth filter; 37. a fin; 371. a first fin portion; 372. a second fin portion;

4. An outdoor heat exchanger; 41. a connecting pipe; 411. a heat exchange part; 412. a first electronic expansion valve; 413. a first filter; 414. a second filter;

5. A regenerative tank; 51. a first tube; 52. a second tube;

6. a water receiving tray; 61. a water receiving tank; 7. refrigerant heat dissipation coil.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A heat exchange system 100 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, a heat exchange system 100 according to an embodiment of the present utility model includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 4, an indoor heat exchanger 3, and a regenerative tank 5.

Specifically, the compressor 1 has a discharge port 11 and a return air port 12, and the air conditioner generates a high-temperature and high-pressure gaseous refrigerant at a cooling condition of the air conditioner, and discharges the gaseous refrigerant through the discharge port 11 to power the refrigeration cycle.

As shown in fig. 1, the four-way valve 2 has a first port 21, a second port 22, a third port 23, and a fourth port 24, the first port 21 communicates with one of the second port 22 and the third port 23, the fourth port 24 communicates with the other of the second port 22 and the third port 23, and the first port 21 communicates with the exhaust port 11. It will be appreciated that the first port 21 communicates with the second port 22 and the fourth port 24 communicates with the third port 23; or the first port 21 communicates with the third port 23 and the fourth port 24 communicates with the second port 22. One end of the outdoor heat exchanger 4 communicates with the second port 22, and one end of the indoor heat exchanger 3 communicates with the third port 23.

As shown in fig. 1, a first pipe 51 is connected to the air return port 12, a second pipe 52 is connected to the fourth port 24, one end of the first pipe 51, which is far away from the air return port 12, and one end of the second pipe 52, which is far away from the fourth port 24, extend into the regenerator 5, a connecting pipe 41 is provided between one end of the outdoor heat exchanger 4, which is far away from the second port 22, and one end of the indoor heat exchanger 3, which is far away from the third port 23, the connecting pipe 41 having a heat exchanging portion 411, and the heat exchanging portion 411 is provided in the regenerator 5.

As shown in fig. 1, in the cooling mode, the first port 21 communicates with the second port 22, and the fourth port 24 communicates with the third port 23. The compressor 1 generates a high-temperature and high-pressure gaseous refrigerant, and the refrigerant generated by the compressor 1 is discharged from the compressor 1 through the discharge port 11, flows into the four-way valve 2 through the first port 21 communicating with the discharge port 11, and flows out to the outdoor heat exchanger 4 from the second port 22. The refrigerant flowing out of the outdoor heat exchanger 4 flows to the connection pipe 41 and enters the heat exchanging portion 411 of the connection pipe 41 provided in the regenerative tank 5, and the refrigerant in the heat exchanging portion 411 flows out of the regenerative tank 5 and then enters the indoor heat exchanger 3 through the other end of the connection pipe 41. The refrigerant in the connecting pipe 41 flows into the indoor heat exchanger 3 and exchanges heat with the hotter external air flow, the refrigerant in the indoor heat exchanger 3 absorbs heat to generate phase change to form gaseous or gas-liquid mixed refrigerant with lower temperature, the refrigerant flowing out of the indoor heat exchanger 3 enters the third port 23 of the four-way valve 2, flows out of the four-way valve 2 from the fourth port 24 communicated with the third port 23, and enters the regenerative tank 5 through the second pipe 52, the refrigerant entering the regenerative tank 5 through the second pipe 52 can be subjected to gas-liquid separation in the regenerative tank 5, and the refrigerant after gas-liquid separation flows back to the return air port 12 of the compressor 1.

The refrigerant having a low temperature entering the regenerator 5 through the second pipe 52 can exchange heat with the refrigerant entering the heat exchange portion 411 of the connection pipe 41 from the outdoor heat exchanger 4 in the regenerator 5, so that the refrigerant in the heat exchange portion 411 is supercooled, the supercooling degree of the refrigerant in the heat exchange portion 411 can be improved, the refrigerating capacity of the heat exchange system 100 can be improved, and the energy efficiency of the air conditioner is high. And the refrigerant entering the heat recovery tank 5 through the second pipe 52 can rise in temperature during heat exchange with the refrigerant flowing into the heat exchange part 411 from the outdoor heat exchanger 4, so that the proportion of the gaseous refrigerant is increased, the content of the liquid refrigerant entering the return air port 12 through the first pipe 51 is reduced, the liquid recovery risk of the compressor 1 is reduced, and the problem of liquid impact of the compressor 1 is avoided. At this time, the temperature of the refrigerant introduced into the compressor 1 through the return pipe 12 is high, and the efficiency of the compressor 1 for generating the high-temperature and high-pressure gaseous refrigerant can be increased.

According to the heat exchange system 100 of the embodiment of the utility model, the heat exchange part 411 is arranged on the connecting pipe 41, the heat exchange part 411 is arranged in the heat recovery tank 5, the refrigerant with lower temperature entering the heat recovery tank 5 through the second pipe 52 can exchange heat with the liquid-state refrigerant entering the heat exchange part 411 of the connecting pipe 41 from the outdoor heat exchanger 4, so that the refrigerant in the heat exchange part 411 is supercooled, the supercooling degree of the refrigerant in the heat exchange part 411 can be improved, the refrigerating capacity of the heat exchange system 100 can be improved, and the energy efficiency of the air conditioner is higher. The refrigerant entering the regenerative tank 5 through the second pipe 52 can be subjected to gas-liquid separation in the regenerative tank 5, and the refrigerant entering the regenerative tank 5 through the second pipe 52 can be heated when exchanging heat with the refrigerant flowing into the heat exchanging part 411 of the outdoor heat exchanger 4, so that more gaseous refrigerant is generated, the refrigerant entering the air return port 12 through the first pipe 51 is all the gaseous refrigerant, the gaseous refrigerant flows into the compressor 1 through the air return port 12, the liquid return risk of the compressor 1 is reduced, and the liquid impact problem of the compressor 1 is avoided.

In some embodiments of the present utility model, as shown in fig. 1, the heat exchanging part 411 is formed in a folded line shape or a spiral shape. At this time, the length of the heat exchanging portion 411 in the regenerator 5 is longer, the heat exchanging area of the heat exchanging portion 411 is larger, the flowing time of the refrigerant flowing out of the outdoor heat exchanger 4 in the heat exchanging portion 411 is longer under the cooling condition, and the refrigerant in the heat exchanging portion 411 can exchange heat with the refrigerant with a lower temperature entering the regenerator 5 through the second pipe 52 better.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the indoor heat exchanger 3 includes an evaporation section 32 and a supercooling section 33, one end of the evaporation section 32 is connected to the third port 23, the other end of the evaporation section 32 is connected to one end of the supercooling section 33, and the other end of the supercooling section 33 is connected to one end of the connection pipe 41 remote from the outdoor heat exchanger 4.

It will be appreciated that the indoor heat exchanger 3, as shown in fig. 1 and 2, includes a heat exchange tube and a plurality of spaced fins 37. The heat exchange tube is a circulation channel of the refrigerant, the heat exchange tube comprises a plurality of U-shaped tubes and a plurality of communicating tubes, two adjacent U-shaped tubes are connected through the communicating tubes, so that the refrigerant flows from one U-shaped tube to the next U-shaped tube, and finally flows out from one U-shaped tube or a plurality of U-shaped tubes. Wherein, the communicating pipe can be U-shaped or arc-shaped. Further, the heat exchange tube includes a supercooling tube and an evaporating tube, through holes for the heat exchange tube to pass through are provided on each fin 37, each fin 37 includes a first fin portion 371 and a second fin portion 372, the supercooling tube is provided in the through holes on the first fin portion 371, the evaporating tube is provided in the through holes on the second fin portion 372, the supercooling tube and the first fin portion 371 are formed into the supercooling section 33, and the evaporating tube and the second fin portion 372 are formed into the evaporating section 32.

Under the refrigeration condition, after the refrigerant in the heat exchange part 411 flows out of the heat recovery tank 5, the refrigerant enters the supercooling pipe of the supercooling section 33 and flows from the supercooling section 33 to the evaporating section 32, the cold energy of the refrigerant in the evaporating section 32 can be transferred to the fins 37, the external air flow with higher temperature in the air conditioner exchanges heat with the fins 37 and the evaporating pipe, and the refrigerant after heat exchange in the evaporating section 32 flows out of the indoor heat exchanger 3.

Further, as shown in fig. 1 and 2, the air conditioner includes a water pan 6, the indoor heat exchanger 3 is located above the water pan 6, the supercooling section 33 is located below the evaporation section 32, and the supercooling section 33 is located in the water pan 6. The refrigerant in the indoor heat exchanger 3 generates condensed water with lower temperature when the evaporation section 32 evaporates, and the water receiving disc 6 is used for receiving the condensed water flowing down on the evaporation section 32, so as to provide a cold source for the secondary supercooling of the supercooling section 33 and ensure the heat exchange effect of the supercooling section 33. Further, the water receiving tray 6 is provided with a water receiving groove 61, condensed water finally gathers in the water receiving groove 61, the supercooling section 33 is arranged in the water receiving groove 61, and the height of the water receiving tray 6 is larger than the height of the supercooling section 33 in the up-down direction (shown in fig. 2), so that the supercooling section 33 and the condensed water in the water receiving tray 6 can exchange heat conveniently, and the heat exchange effect of the supercooling section 33 is ensured.

It can be understood that when the air conditioner is in refrigeration operation, the refrigerant flows into the supercooling section 33 first, the condensed water generated by evaporation of the evaporating section 32 drops on the supercooling section 33, the refrigerant in the supercooling section 33 is further cooled, the refrigerant after secondary supercooling flows to the evaporating section 32 for evaporation and heat absorption, the heat exchange effect of the indoor heat exchanger 3 is improved, the condensed water generated after evaporation can be fully utilized, the supercooling degree and the refrigerating capacity of the air conditioner are improved, the refrigeration effect of the air conditioner is enhanced, and the use experience of a user is further improved. And, through the heat exchange of refrigerant and comdenstion water in the super cold pipe, improved the temperature of comdenstion water, and then improved the temperature of water collector 6 to can reduce the risk of water collector 6 condensation.

In some embodiments of the present utility model, the flow direction of the refrigerant on the evaporator section 32 is from the end of the evaporator section 32 remote from the super-cooling section 33 to the end of the evaporator section 32 near the super-cooling section 33. Under the refrigeration condition, the refrigerant in the heat exchange part 411 flows out of the heat recovery tank 5 and then enters the supercooling pipe of the supercooling section 33 to be supercooled for the second time. The refrigerant in the supercooling section first passes through the evaporation pipe at the end of the evaporation section 32 remote from the supercooling section 33, and then flows to the end of the evaporation section 32 near the supercooling section 33 through the evaporation pipe and the communication pipe. It will be appreciated that when the refrigerant in the supercooling section 33 flows to the end of the evaporation section 32 near the supercooling section 33, the refrigerant has undergone a great deal of phase change and heat exchange, the temperature of the refrigerant at the end of the evaporation section 32 near the supercooling section 33 is low, the cold of the refrigerant at the end of the evaporation section 32 near the supercooling section 33 can be transferred to the fins 37, the fins 37 can transfer the cold to the refrigerant in the supercooling section 33 faster, three supercooling of the refrigerant in the supercooling section 33 is achieved, and the supercooling degree of the refrigerant in the supercooling section 33 can be improved, so that the energy efficiency of the air conditioner is high.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the indoor heat exchanger 3 includes a plurality of sub heat exchangers 31, as shown in fig. 1 and 2, the plurality of sub heat exchangers 31 are arranged along a straight line (refer to the direction b shown in fig. 2), and any two adjacent sub heat exchangers 31 are angled with each other, so that the heat exchange area of the indoor heat exchanger 3 can be increased, and the heat exchange efficiency of the indoor heat exchanger 3 can be improved. For example, the sub heat exchangers 31 may be two, three, four, five or six sequentially connected along a straight line. In a specific example, as shown in fig. 2, the sub heat exchangers 31 are four connected in sequence in a straight direction. The evaporation section 32 includes a plurality of sub-evaporation sections 321, and the supercooling section 33 includes a plurality of sub-supercooling sections 331, and each sub-heat exchanger 31 includes one evaporation section 32 and one supercooling section 33 arranged along the length direction of the sub-heat exchanger 31. In this embodiment, the supercooling sections 33 of two adjacent sub-heat exchangers 31 are located at one end of two adjacent sub-heat exchangers 31 close to each other or one end far away from each other, and the supercooling sections 33 of each sub-heat exchanger 31 are all located at one end of the sub-heat exchanger 31 close to the water receiving disc 6, so that the supercooling sections 33 of each sub-heat exchanger 31 are all located at the same end of the sub-heat exchanger 31 in the length direction, the cooling effect of the supercooling sections 33 on the liquid refrigerant can be further improved, the heat exchange effect of the indoor heat exchanger 3 is further improved, and the arrangement of the indoor heat exchanger 3 is facilitated.

In a further embodiment of the present utility model, the indoor heat exchanger 3 is formed into an "M" shape, a "V" shape, a "W" shape or an "inverted V" shape, so that condensed water and the refrigerant of the supercooling section 33 exchange heat, and the cooling effect of the refrigerant of the supercooling section 33 is further improved, thereby achieving different cooling effects and meeting different demands of users.

When the indoor heat exchanger 3 is formed in an "M" type, referring to fig. 2, the indoor heat exchanger 3 includes a first heat exchanger 311, a second heat exchanger 312, a third heat exchanger 313 and a fourth heat exchanger 314, the first heat exchanger 311, the second heat exchanger 312, the third heat exchanger 313 and the fourth heat exchanger 314 are arranged in a straight line and sequentially connected, any adjacent two sub heat exchangers 31 among the four sub heat exchangers 31 are angled with each other, one ends of the evaporation sections 32 of the first heat exchanger 311 and the second heat exchanger 312, which are far from the supercooling section 33, are connected, one ends of the evaporation sections 32 of the second heat exchanger 312 and the third heat exchanger 313, which are far from the supercooling section 33, are connected, one ends of the evaporation sections 32 of the third heat exchanger 313 and the fourth heat exchanger 314, which are parallel to the third heat exchanger 313, and the second heat exchanger 312, which are parallel to the fourth heat exchanger 314.

When the indoor heat exchanger 3 is formed in a "V" shape, the indoor heat exchanger 3 includes a first heat exchanger 311 and a second heat exchanger 312, the first heat exchanger 311 and the second heat exchanger 312 are arranged and connected along a straight line, the first heat exchanger 311 and the second heat exchanger 312 are angled with each other, and one ends of the supercooling sections 33 of the first heat exchanger 311 and the second heat exchanger 312 are connected.

When the indoor heat exchanger 3 is formed in a "W" shape, the indoor heat exchanger 3 includes a first heat exchanger 311, a second heat exchanger 312, a third heat exchanger 313 and a fourth heat exchanger 314, the first heat exchanger 311, the second heat exchanger 312, the third heat exchanger 313 and the fourth heat exchanger 314 are arranged along a straight line and are sequentially connected, any adjacent two sub-heat exchangers 31 of the four sub-heat exchangers 31 are angled with each other, one ends of the supercooling sections 33 of the first heat exchanger 311 and the second heat exchanger 312 are connected, one ends of the evaporation sections 32 of the second heat exchanger 312 and the third heat exchanger 313, which are far from the supercooling sections 33, are connected, one ends of the supercooling sections 33 of the third heat exchanger 313 and the fourth heat exchanger 314 are connected, wherein the first heat exchanger 311 is parallel to the third heat exchanger 313, and the second heat exchanger 312 is parallel to the fourth heat exchanger 314.

When the indoor heat exchanger 3 is formed in an "inverted V" shape, the indoor heat exchanger 3 includes a first heat exchanger 311 and a second heat exchanger 312, the first heat exchanger 311 and the second heat exchanger 312 are arranged and connected in a straight line, the first heat exchanger 311 and the second heat exchanger 312 are angled with each other, and one ends of the evaporation sections 32 of the first heat exchanger 311 and the second heat exchanger 312, which are far from the supercooling section 33, are connected.

In some embodiments of the present utility model, as shown in fig. 1, a first electronic expansion valve 412, a first filter 413, and a second filter 414 are provided on the connection pipe 41, the first electronic expansion valve 412 is located between the regenerative tank 5 and the outdoor heat exchanger 4, the first filter 413 is located between the first electronic expansion valve 412 and the outdoor heat exchanger 4, and the second filter 414 is located between the regenerative tank 5 and the first electronic expansion valve 412. The refrigerant is filtered as it flows into and out of the first electronic expansion valve 412, thereby removing foreign matters from the refrigerant and ensuring more efficient operation of the air conditioner.

In some embodiments of the present utility model, as shown in fig. 1, a second electronic expansion valve 34, a third filter 35, and a fourth filter 36 are provided between the supercooling stage 33 and the evaporation stage 32, the third filter 35 is located between the evaporation stage 32 and the second electronic expansion valve 34, and the fourth filter 36 is located between the second electronic expansion valve 34 and the supercooling stage 33. The refrigerant is filtered as it flows into and out of the second electronic expansion valve 34, thereby removing foreign matter from the refrigerant and ensuring more efficient operation of the air conditioner.

In the refrigeration mode, the high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger 4 through the four-way valve 2 from the exhaust port 11 of the compressor 1, and forms a state of high-pressure and medium-temperature gaseous refrigerant or gas-liquid coexistence after condensation and heat dissipation in the outdoor heat exchanger 4, at this time, the first electronic expansion valve 412 is kept in a full open state all the time, the gaseous refrigerant enters the first electronic expansion valve 412 after being filtered by the first filter 413, the first electronic expansion valve 412 enables the gaseous refrigerant to be quickly cooled into low-temperature and low-pressure liquid refrigerant, and enters the regenerative tank 5 after being secondarily filtered by the second filter 414 to exchange heat with the refrigerant flowing out of the indoor heat exchanger 3, the refrigerant exchanges heat with condensed water after flowing into the indoor heat exchanger 3, the temperature of the refrigerant in the supercooling section 33 is further reduced, and the condensed water temperature is improved to a certain extent. After passing through the supercooling section 33, the refrigerant enters the second electronic expansion valve 34 to be throttled after being filtered by the fourth filter 36, the throttled refrigerant enters the evaporation section 32 to exchange heat with external air flow after being secondarily filtered by the third filter 35, the refrigerant after heat exchange flows out of the indoor heat exchanger 3 and enters the regenerative tank 5 through the four-way valve 2, exchanges heat with the refrigerant of the heat exchange part 411, returns to the compressor 1 from the first pipe 51 after being subjected to gas-liquid separation, and is repeatedly circulated in this way.

In the heating mode, the first port 21 of the four-way valve 2 is communicated with the third port 34, the second port 22 is communicated with the fourth port 24, high-temperature and high-pressure gaseous refrigerant enters the indoor heat exchanger 3 from the exhaust port 11 of the compressor 1 through the first port 21 and the third port 23 of the four-way valve 2, heat exchange is carried out between the evaporation section 32 of the indoor heat exchanger 3 and external air flow, the refrigerant in the evaporation section 32 carries out condensation and heat dissipation, the external air flow absorbs heat and rises in temperature, and hot air is blown into the room. At this time, the second electronic expansion valve 34 is kept in a fully opened state all the time, the supercooling section 33 will not affect the indoor temperature, the refrigerant enters the second electronic expansion valve 45 to throttle after being filtered by the third filter 35, the throttled refrigerant enters the outdoor heat exchanger 4 to evaporate through the connecting pipe 41 after being filtered by the fourth filter 36, at this time, the first electronic expansion valve 412 is kept in a fully opened state all the time, the refrigerant enters the first electronic expansion valve 412 to throttle after being filtered by the second filter 414, the throttled refrigerant flows through the second port 22 and the fourth port 24 of the four-way valve 2 after being filtered by the first filter 413 and flows to the second pipe 52 of the heat recovery tank 5, the refrigerant entering the heat recovery tank 5 from the second pipe 52 exchanges heat with the refrigerant in the heat exchange portion 411 of the connecting pipe 41, the refrigerant returns to the compressor 1 from the first pipe 51 after being separated from the gas and liquid, the refrigerant returning to the compressor 1 from the first pipe 51 rises in temperature, the temperature of the refrigerant can be increased, the temperature of the refrigerant of the compressor 1 can be increased, the refrigerant is higher in temperature of the compressor 1, and the temperature is higher in temperature than the air conditioner, and the air conditioner is more efficient.

In some embodiments of the present utility model, as shown in fig. 1, a refrigerant heat dissipation coil 7 is further disposed on the connection pipe 41, and the refrigerant heat dissipation coil 7 is disposed between the first electronic expansion valve 412 and the regenerator tank 5. The mode switching and the temperature control of the air conditioner can be realized by controlling the flow direction and the flow velocity of the refrigerant through the refrigerant heat dissipation coil 7.

The following describes a heat exchange system 100 in accordance with one particular embodiment of the present utility model with reference to the accompanying drawings, it being understood that the following description is illustrative only and is intended to be illustrative of the utility model and not to be construed as limiting the utility model.

The heat exchange system 100 according to an embodiment of the present utility model includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 4, an indoor heat exchanger 3, and a regenerative tank 5.

Specifically, as shown in fig. 1, the compressor 1 has a discharge port 11 and a return air port 12, and the air conditioner generates high-temperature and high-pressure gaseous refrigerant at a cooling condition of the air conditioner, and discharges the gaseous refrigerant through the discharge port 11 to power the refrigeration cycle.

The four-way valve 2 has a first port 21, a second port 22, a third port 23, and a fourth port 24, the first port 21 communicates with the second port 22, the fourth port 24 communicates with the third port 23, the first port 21 communicates with the exhaust port 11, one end of the outdoor heat exchanger 4 communicates with the second port 22, and one end of the indoor heat exchanger 3 communicates with the third port 23.

The first pipe 51 is connected to the air return port 12, the second pipe 52 is connected to the fourth port 24, one end of the first pipe 51 far away from the air return port 12 and one end of the second pipe 52 far away from the fourth port 24 extend into the regenerator tank 5, a connecting pipe 41 is arranged between one end of the outdoor heat exchanger 4 far away from the second port 22 and one end of the indoor heat exchanger 3 far away from the third port 23, the connecting pipe 41 is provided with a heat exchanging part 411, the heat exchanging part 411 is in a folded line shape or a spiral shape, and the heat exchanging part 411 is arranged in the regenerator tank 5.

In the cooling mode, the refrigerant generated in the compressor 1 is discharged from the compressor 1 through the discharge port 11, flows into the four-way valve 2 through the first port 21 communicating with the discharge port 11, and flows out to the outdoor heat exchanger 4 from the second port 22. The refrigerant flowing out of the outdoor heat exchanger 4 flows to the connection pipe 41 and enters the heat exchanging portion 411 of the connection pipe 41 provided in the regenerative tank 5, and the refrigerant in the heat exchanging portion 411 flows out of the regenerative tank 5 and then enters the indoor heat exchanger 3 through the other end of the connection pipe 41. The refrigerant in the connecting pipe 41 flows into the indoor heat exchanger 3 and exchanges heat with the hotter external air flow, the refrigerant in the indoor heat exchanger 3 absorbs heat to generate phase change to form gaseous or gas-liquid mixed refrigerant with lower temperature, the refrigerant flowing out of the indoor heat exchanger 3 enters the third port 23 of the four-way valve 2, flows out of the four-way valve 2 from the fourth port 24 communicated with the third port 23, and enters the regenerative tank 5 through the second pipe 52, the refrigerant entering the regenerative tank 5 through the second pipe 52 can be subjected to gas-liquid separation in the regenerative tank 5, and the refrigerant after gas-liquid separation flows back to the return air port 12 of the compressor 1.

The refrigerant having a low temperature entering the regenerator 5 through the second pipe 52 can exchange heat with the refrigerant entering the heat exchange portion 411 of the connection pipe 41 from the outdoor heat exchanger 4 in the regenerator 5, so that the refrigerant in the heat exchange portion 411 is supercooled, the supercooling degree of the refrigerant in the heat exchange portion 411 can be improved, the refrigerating capacity of the heat exchange system 100 can be improved, and the energy efficiency of the air conditioner is high. And the refrigerant entering the heat recovery tank 5 through the second pipe 52 can rise in temperature during heat exchange with the refrigerant flowing into the heat exchange part 411 from the outdoor heat exchanger 4, so that the proportion of the gaseous refrigerant is increased, the content of the liquid refrigerant entering the return port 12 through the first pipe 51 is reduced, the gaseous refrigerant flows into the compressor 1 through the return port 12, the liquid recovery risk of the compressor 1 is reduced, and the problem of liquid impact of the compressor 1 is avoided.

The heat exchanging portion 411 is formed in a folded line shape or a spiral shape. At this time, the length of the heat exchanging portion 411 in the regenerator 5 is longer, the heat exchanging area of the heat exchanging portion 411 is larger, the flowing time of the refrigerant flowing out of the outdoor heat exchanger 4 in the heat exchanging portion 411 is longer under the cooling condition, and the refrigerant in the heat exchanging portion 411 can exchange heat with the refrigerant with a lower temperature entering the regenerator 5 through the second pipe 52 better.

The indoor heat exchanger 3 includes an evaporation section 32 and a supercooling section 33, one end of the evaporation section 32 away from the third port 23 is connected to one end of the supercooling section 33, and one end of the connection pipe 41 away from the outdoor heat exchanger 4 is connected to one end of the supercooling section 33 away from the evaporation section 32. Under the refrigeration condition, after the refrigerant in the heat exchange part 411 flows out of the heat recovery tank 5, the refrigerant enters the supercooling pipe of the supercooling section 33 and flows from the supercooling section 33 to the evaporating section 32, the cold energy of the refrigerant in the evaporating section 32 can be transferred to the fins 37, the external air flow with higher temperature in the air conditioner exchanges heat with the fins 37 and the evaporating pipe, and the refrigerant after heat exchange in the evaporating section 32 flows out of the indoor heat exchanger 3.

The air conditioner comprises a water receiving disc 6, the indoor heat exchanger 3 is positioned above the water receiving disc 6, the supercooling section 33 is positioned below the evaporating section 32, and the supercooling section 33 is positioned in the water receiving disc 6. The refrigerant in the indoor heat exchanger 3 generates condensed water with lower temperature when the evaporation section 32 evaporates, and the water receiving disc 6 is used for receiving the condensed water flowing down on the evaporation section 32, so as to provide a cold source for the secondary supercooling of the supercooling section 33 and ensure the heat exchange effect of the supercooling section 33. Further, the water receiving tray 6 is provided with a water receiving groove 61, condensed water finally gathers in the water receiving groove 61, the supercooling section 33 is provided in the water receiving groove 61, and the height of the water receiving tray 6 is larger than the height of the supercooling section 33 in the up-down direction. And, through the heat exchange of liquid refrigerant and comdenstion water, improved the temperature of comdenstion water, and then improved the temperature of water collector 6 to can reduce the risk of water collector 6 condensation.

The flow direction of the refrigerant on the evaporation section 32 is from the end of the evaporation section 32 away from the supercooling section 33 to the end of the evaporation section 32 near the supercooling section 33. The outdoor heat exchanger 4 includes a plurality of sub heat exchangers 31, the plurality of sub heat exchangers 31 are arranged along a straight line, angles are formed between any two adjacent sub heat exchangers 31, the evaporation section 32 includes a plurality of sub evaporation sections 321, each supercooling section 33 includes a plurality of sub supercooling sections 331, and each sub heat exchanger 31 includes an evaporation section 32 and a supercooling section 33 arranged along the length direction of the sub heat exchanger 31.

The connecting pipe 41 is provided with a first electronic expansion valve 412, a first filter 413 and a second filter 414, the first electronic expansion valve 412 is positioned between the regenerative tank 5 and the outdoor heat exchanger 4, the first filter 413 is positioned between the first electronic expansion valve 412 and the outdoor heat exchanger 4, and the second filter 414 is positioned between the regenerative tank 5 and the first electronic expansion valve 412. A second electronic expansion valve 34, a third filter 35 and a fourth filter 36 are arranged between the supercooling section 33 and the evaporating section 32, the third filter 35 is positioned between the evaporating section 32 and the second electronic expansion valve 34, and the fourth filter 36 is positioned between the second electronic expansion valve 34 and the supercooling section 33.

In the refrigeration mode, the high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger 4 through the four-way valve 2 from the exhaust port 11 of the compressor 1, and forms a state of high-pressure and medium-temperature gaseous refrigerant or gas-liquid coexistence after condensation and heat dissipation in the outdoor heat exchanger 4, at this time, the first electronic expansion valve 412 is kept in a full open state all the time, the gaseous refrigerant enters the first electronic expansion valve 412 after being filtered by the first filter 413, the first electronic expansion valve 412 enables the gaseous refrigerant to be quickly cooled into low-temperature and low-pressure liquid refrigerant, and enters the regenerative tank 5 after being secondarily filtered by the second filter 414 to exchange heat with the refrigerant flowing out of the indoor heat exchanger 3, the refrigerant exchanges heat with condensed water after flowing into the indoor heat exchanger 3, the temperature of the refrigerant in the supercooling section 33 is further reduced, and the condensed water temperature is improved to a certain extent. After passing through the supercooling section 33, the refrigerant enters the second electronic expansion valve 34 to be throttled after being filtered by the fourth filter 36, the throttled liquid refrigerant enters the evaporation section 32 to exchange heat with external air flow after being filtered by the third filter 35, the heat-exchanged refrigerant flows out of the indoor heat exchanger 3 and enters the regenerative tank 5 through the four-way valve 2, exchanges heat with the refrigerant of the heat exchange part 411, returns to the compressor 1 from the first pipe 51 after being subjected to gas-liquid separation, and is repeatedly circulated in this way.

The connecting pipe 41 is also provided with a refrigerant heat dissipation coil 7, and the refrigerant heat dissipation coil 7 is arranged between the first electronic expansion valve 412 and the regenerative tank 5. The mode switching and the temperature control of the air conditioner can be realized by controlling the flow direction and the flow velocity of the refrigerant through the refrigerant heat dissipation coil 7.

An air conditioner according to one embodiment of the present utility model is described below with reference to the accompanying drawings, it being understood that the following description is only exemplary and is intended to illustrate the present utility model, not to limit the present utility model.

An air conditioner according to an embodiment of the present utility model includes the heat exchange system 100 described above.

According to the air conditioner of the embodiment of the utility model, the heat exchange part 411 is arranged on the connecting pipe 41, the heat exchange part 411 is arranged in the heat recovery tank 5, the refrigerant with lower temperature entering the heat recovery tank 5 through the second pipe 52 can exchange heat with the liquid-state refrigerant entering the heat exchange part 411 of the connecting pipe 41 from the outdoor heat exchanger 4, so that the refrigerant in the heat exchange part 411 is supercooled, the supercooling degree of the refrigerant in the heat exchange part 411 can be improved, the refrigerating capacity of the heat exchange system 100 can be improved, and the energy efficiency of the air conditioner is higher. The refrigerant entering the regenerative tank 5 through the second pipe 52 can be subjected to gas-liquid separation in the regenerative tank 5, and the refrigerant entering the regenerative tank 5 through the second pipe 52 can be heated when exchanging heat with the refrigerant flowing into the heat exchanging part 411 of the outdoor heat exchanger 4, so that more gaseous refrigerant is generated, the refrigerant entering the air return port 12 through the first pipe 51 is all the gaseous refrigerant, the gaseous refrigerant flows into the compressor 1 through the air return port 12, the liquid return risk of the compressor 1 is reduced, and the liquid impact problem of the compressor 1 is avoided.

Other constructions and operations of the heat exchange system 100 according to embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A heat exchange system of an air conditioner, comprising:

A compressor having an exhaust port and a return air port;

A four-way valve having a first port in communication with one of the second port and the third port, a second port in communication with the other of the second port and the third port, a third port in communication with the exhaust port, and a fourth port in communication with the other of the second port and the third port;

an outdoor heat exchanger, one end of which is communicated with the second port;

An indoor heat exchanger, wherein one end of the indoor heat exchanger is communicated with the third port;

The heat recovery tank is characterized in that a first pipe is connected to the air return port, a second pipe is connected to the fourth port, one end, far away from the air return port, of the first pipe and one end, far away from the fourth port, of the second pipe extend into the heat recovery tank, a connecting pipe is arranged between one end, far away from the second port, of the outdoor heat exchanger and one end, far away from the third port, of the indoor heat exchanger, and the connecting pipe is provided with a heat exchange portion, and the heat exchange portion is arranged in the heat recovery tank.

2. The heat exchange system of an air conditioner according to claim 1, wherein the heat exchange portion is formed in a folded line shape or a spiral shape.

3. The heat exchange system of an air conditioner according to claim 1, wherein the indoor heat exchanger includes an evaporation section and a supercooling section, one end of the evaporation section is connected to the third port, the other end of the evaporation section is connected to one end of the supercooling section, and the other end of the supercooling section is connected to one end of the connection pipe remote from the outdoor heat exchanger.

4. A heat exchange system according to claim 3 wherein the air conditioner includes a water pan, the indoor heat exchanger is located above the water pan, the supercooling section is located below the evaporating section, and the supercooling section is located within the water pan.

5. The heat exchanging system of claim 3 or 4, wherein the flow direction of the refrigerant on the evaporation section is from the end of the evaporation section away from the supercooling section to the end of the evaporation section near the supercooling section when the air conditioner is operated for cooling.

6. The heat exchange system as set forth in claim 3 or 4, wherein said indoor heat exchanger comprises a plurality of sub heat exchangers, a plurality of said sub heat exchangers are arranged in a straight line, any adjacent two of said heat exchangers are angled with each other, said evaporation section comprises a plurality of sub evaporation sections, said supercooling section comprises a plurality of sub supercooling sections, and each of said sub heat exchangers comprises one of said evaporation sections and one of said supercooling sections arranged in a longitudinal direction of said sub heat exchanger.

7. The heat exchange system of claim 1, wherein the connection pipe is provided with a first electronic expansion valve, a first filter and a second filter, the first electronic expansion valve is located between the regenerative tank and the outdoor heat exchanger, the first filter is located between the first electronic expansion valve and the outdoor heat exchanger, and the second filter is located between the regenerative tank and the first electronic expansion valve.

8. A heat exchange system of an air conditioner according to claim 3, wherein a second electronic expansion valve, a third filter and a fourth filter are provided between the supercooling section and the evaporating section, the third filter is located between the evaporating section and the second electronic expansion valve, and the fourth filter is located between the second electronic expansion valve and the supercooling section.

9. The heat exchange system of claim 7, wherein the connecting pipe is further provided with a refrigerant heat-dissipating coil, and the refrigerant heat-dissipating coil is disposed between the first electronic expansion valve and the regenerative tank.

10. An air conditioner comprising a heat exchange system of an air conditioner according to any one of claims 1 to 9.