CN210624738U

CN210624738U - Heat exchanger, air conditioner and air conditioning system

Info

Publication number: CN210624738U
Application number: CN201921480690.XU
Authority: CN
Inventors: 卢耀汕; 吴迎文; 杨瑞琦
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-26
Anticipated expiration: 2029-09-06

Abstract

The utility model provides a heat exchanger, air conditioner, air conditioning system. The heat exchanger comprises a liquid collecting and separating assembly, wherein the liquid collecting and separating assembly comprises a first liquid collecting pipe and a plurality of first heat conducting pipes connected with the first liquid collecting pipe, each first heat conducting pipe is provided with a first pipe section, the first pipe sections are parallel to the length direction of the first liquid collecting pipe, when the heat exchanger is used, the length of the first liquid collecting pipe is in the horizontal direction, the first liquid collecting pipe is provided with an inner height H in the vertical direction, and L is larger than H. The utility model discloses a heat exchanger, air conditioner, air conditioning system can prevent effectively that the refrigerant gas-liquid double-phase layering phenomenon in the collecting tube from producing, makes the refrigerant can be more even distribute to each heat pipe in, improves the heat exchange efficiency of heat exchanger.

Description

Heat exchanger, air conditioner and air conditioning system

Technical Field

The utility model belongs to the technical field of air conditioning, concretely relates to heat exchanger, air conditioner, air conditioning system.

Background

The microchannel heat exchanger of the traditional split type air conditioner outdoor unit is provided with liquid collecting pipes for collecting or distributing refrigerants, under a specific use state, the liquid collecting pipes of the heat exchanger are in a vertical position, a plurality of flat pipes are connected between two liquid collecting pipes on two sides at intervals in sequence, namely, the length directions of the flat pipes are perpendicular to the length directions of the liquid collecting pipes, when the microchannel heat exchanger is used as an evaporator (for example, an air conditioner is in a heating mode), the refrigerant in the liquid collecting pipes is obviously subjected to gas-liquid two-phase layering due to the action of gravity, the refrigerant entering the flat pipes is extremely uneven in distribution, and the heat exchange performance is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model is to provide a heat exchanger, air conditioner, air conditioning system can prevent effectively that the double-phase layering phenomenon of refrigerant gas-liquid in the collecting tube from producing, makes during refrigerant can each heat pipe of more even distribution, improves the heat exchange efficiency of heat exchanger.

In order to solve the problem, the utility model provides a heat exchanger, including collection liquid subassembly, collection liquid subassembly include first collector tube and with many first heat pipes that first collector tube is connected, first heat pipe has first pipeline section, first pipeline section with first collector tube length direction is parallel, and the heat exchanger is when using, the length of first collector tube is in the horizontal direction, first collector tube has the intraductal high H that is in vertical direction, and L > H.

Preferably, the first heat conducting pipe further has a second pipe section connected to one end of the first pipe section, an included angle is formed between the first pipe section and the second pipe section, and the first heat conducting pipe is connected with the first liquid collecting pipe through the second pipe section.

Preferably, the second pipe sections of the first heat conduction pipes are arranged at intervals or staggered along the length of the first header pipe.

Preferably, a first distance in the vertical direction is formed between any two adjacent first heat conduction pipes in the plurality of first heat conduction pipes, and the minimum value of the first distance is d, and H is greater than or equal to d and less than or equal to 2 d.

Preferably, the first liquid collecting pipe comprises a pipe body and a first cover body connected to one end of the length of the pipe body, wherein one end of the first cover body is open, and the first cover body is provided with a first inlet.

Preferably, the first liquid collecting pipe further comprises a second cover body connected to the pipe body and having an opening at the other end of the length, the second cover body is provided with a first outlet, the first liquid collecting pipe further comprises a second heat conducting pipe, and one end of the second heat conducting pipe is connected to the first outlet; or the liquid collecting and separating component also comprises a second liquid collecting pipe, and one ends of the first heat conducting pipe and the second heat conducting pipe, which are far away from the first liquid collecting pipe, of the liquid collecting and separating component are communicated with the second liquid collecting pipe.

Preferably, the heat exchanger further comprises a second liquid collecting pipe, the liquid collecting and separating assembly has multiple groups, and one end, away from the first liquid collecting pipe, of the first heat conducting pipe and one end, away from the second liquid collecting pipe, of the second heat conducting pipe, of any one group of the multiple groups of the liquid collecting and separating assembly are in through connection with the second liquid collecting pipe.

The utility model also provides an air conditioner, including foretell heat exchanger.

The utility model also provides an air conditioning system, including foretell heat exchanger.

Preferably, the air conditioning system further comprises an indoor side heat exchanger, and the heat exchanger has a first liquid collecting pipe between the second liquid collecting pipe and the indoor side heat exchanger.

Preferably, the air conditioning system further comprises a first throttling element and a flow divider, the first throttling element and the flow divider are sequentially arranged on a pipeline between the first liquid collecting pipe and the indoor side heat exchanger, and the flow divider is arranged between the first throttling element and the first liquid collecting pipe.

The utility model provides a pair of heat exchanger, air conditioner, air conditioning system will the main heat dissipation section of first heat pipe with the length direction parallel arrangement of first collector tube to make L > H, so realize that get into when the double-phase refrigerant of gas-liquid during first collector tube, because H is less relatively, thereby the refrigerant is difficult for taking place the ascending stratification phenomenon of vertical side, makes during each heat pipe of distribution that the refrigerant can be more even, improves the heat exchange efficiency of heat exchanger.

Drawings

Fig. 1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of the heat exchanger shown in FIG. 1;

FIG. 3 is a schematic structural diagram of the first cover in FIG. 1;

FIG. 4 is a schematic structural view of the second cover in FIG. 1;

fig. 5 is a schematic diagram of an air conditioning system according to another embodiment of the present invention.

The reference numerals are represented as:

1. a first liquid collection pipe; 11. a pipe body; 12. a first cover body; 121. a first inlet; 13. a second cover body; 131. a first outlet; 2. a first heat conductive pipe; 21. a first tube section; 22. a second tube section; 3. a second heat conductive pipe; 4. a second liquid collecting pipe; 100. an indoor-side heat exchanger; 101. a first throttling element; 102. a flow divider; 103. a compressor; 104. and a four-way valve.

Detailed Description

With reference to fig. 1 to 5, according to an embodiment of the present invention, there is provided a heat exchanger, including an integrated liquid distribution assembly, the integrated liquid distribution assembly includes a first liquid collecting pipe 1 and a plurality of first heat conducting pipes 2 connected to the first liquid collecting pipe 1, the first heat conducting pipe 2 has a first pipe section 21, the first pipe section 21 is parallel to the first liquid collecting pipe 1 in the length direction, when the heat exchanger is in use, the length of the first liquid collecting pipe 1 is in the horizontal direction, the first liquid collecting pipe 1 has an in-pipe height H in the vertical direction, and L > H, it can be understood that the first pipe section 21 is a main heat dissipation section of the first heat conducting pipe 2, and the first liquid collecting pipe 1 is at least greater than, preferably much greater than, the in-pipe height H in the vertical direction of the first liquid collecting pipe 1 in length. By adopting the technical scheme, the main heat dissipation section of the first heat conduction pipe 2 is arranged in parallel with the length direction of the first liquid collection pipe 1, and L is larger than H (it can be understood that the selection of H is determined according to the type of refrigerant, the refrigerant usage amount of a system and the like, and the principle of ensuring that the refrigerant in the first liquid collection pipe 1 does not have gas-liquid phase separation is adopted), so that when the gas-liquid two-phase refrigerant enters the first liquid collection pipe 1, the H is relatively small, the refrigerant is not easy to have the layering phenomenon in the vertical direction, the refrigerant can be more uniformly distributed into the heat conduction pipes, and the heat exchange efficiency of the heat exchanger is improved.

Further, when a first distance in the vertical direction is formed between any two adjacent first heat conduction pipes 2 in the plurality of first heat conduction pipes 2, and the minimum value of the first distance is d, and d is not less than H and not more than 2d, it can be ensured to the greatest extent that the gas-liquid two-phase refrigerant is uniformly distributed to the heat conduction pipes before being layered when flowing through the first header pipe 1.

Preferably, the first heat conducting pipe 2 further has a second pipe section 22 connected to one end of the first pipe section 21, an included angle is formed between the first pipe section 21 and the second pipe section 22, and the first heat conducting pipe 2 is connected to the first header 1 through the second pipe section 22, in this way, the connection arrangement between the first heat conducting pipe 2 and the first header 1 is more flexible, and the whole connection is prevented from being concentrated on one side wall of the first header 1, which is beneficial to reducing the inner height of the first header 1. It will further be appreciated that the plurality of first heat transfer tubes 2 may or may not have the same, and preferably will not have the same, length of the first tube segments 21, which may make it more convenient to arrange and connect the plurality of first heat transfer tubes 2 to the first header 1.

For example, as shown in fig. 1, the second tube segments 22 of each of the plurality of first heat conductive tubes 2 are arranged along the length of the first header 1 at intervals in the order of the spacing or alternately, where the spacing is an arrangement in which the plurality of first heat conductive tubes 2 are spaced apart from each other in the length direction of the first header 1, and the alternately arranged ends of the first heat conductive tubes 2 in the upper row are located in the gaps formed between two adjacent first heat conductive tubes 2 in the lower row.

As an embodiment of the first header 1, preferably, the first header 1 includes a tube 11 and a first cover 12 connected to the tube 11 and having an opening at one end of the length thereof, the first cover 12 having a first inlet 121; preferably, the first header 1 further comprises a second cover 13 connected to the other end of the length of the pipe 11, the second cover 13 having a first outlet 131, and a second heat pipe 3, one end of the second heat pipe 3 being connected to the first outlet 131. The first cover 12 and the second cover 13 may be connected to openings at two ends of the length of the first header 1 by bolts, for example, and this detachable connection method is more suitable for a connection method of assembling the first header 1 and the first heat pipe 2 or the second heat pipe 3, which can facilitate visual inspection of the connection condition of the inner side of the tube 11, for example, when the first heat pipe 2 and the tube 11 are welded, it can be observed whether solder permeates into the inner side of the tube 11, so as to prevent defects of the welding process.

Preferably, the heat exchanger still includes second collector tube 4, what liquid component was gathered have first heat pipe 2, second heat pipe 3 keep away from first collector tube 1 one end with second collector tube 4 through connection, second collector tube 4 adopt among the prior art the collector tube structure can, the utility model discloses do not specially limit it. In another preferred embodiment, the heat exchanger further comprises a second liquid collecting pipe 4, the liquid collecting and separating assembly has multiple groups, and one end of the first heat conducting pipe 2 and one end of the second heat conducting pipe 3, which are far away from the first liquid collecting pipe 1, of any one of the multiple groups of the liquid collecting and separating assembly are connected with the second liquid collecting pipe 4 in a penetrating manner, so that the length of the second liquid collecting pipe 4 can be effectively reduced, and the requirement on installation space is smaller.

Further, in order to improve the heat exchange efficiency of the heat exchanger, a fin may be disposed between any two adjacent first heat conduction pipes 2, and/or a fin may be disposed between any two adjacent first heat conduction pipes 2 and second heat conduction pipes 3, so as to increase the heat exchange area. The cross sections of the first heat pipe 2 and the second heat pipe 3 may be rectangular, so that the first heat pipe and the second heat pipe have flat tube structures.

The utility model provides an air conditioning system, including foretell heat exchanger, air conditioning system still includes indoor side heat exchanger 100, first collector pipe 1 that the heat exchanger has is in second collector pipe 4 with between the indoor side heat exchanger 100, further still include first throttling element 101, shunt 102, compressor 103, cross valve 104, first throttling element 101, shunt 102 are in proper order first collector pipe 1 with on the pipeline between the indoor side heat exchanger 100, just shunt 102 is in first throttling element 101 with between the first collector pipe 1, compressor 103 passes through cross valve 104 with indoor side heat exchanger 100 or foretell heat exchanger are optionally link up to realize that air conditioning system has the refrigeration or the mode of heating. In the technical scheme, when the air conditioning system is in a heating mode, a high-temperature high-pressure gaseous refrigerant discharged by the compressor 103 firstly enters the indoor side heat exchanger 100 through the four-way valve 104 and realizes heat release and temperature reduction to form a gas-liquid two-phase refrigerant mixture, the gas-liquid two-phase refrigerant mixture is throttled and reduced in pressure by the first throttling element 101 and then is divided into a plurality of strands by the flow divider 102 and then correspondingly enters the multi-group liquid collecting and separating assembly of the heat exchanger, and the gas-liquid two-phase refrigerant mixture is more uniformly distributed into the first heat conducting pipe 2 and the second heat conducting pipe 3 in the first liquid collecting pipe 1, so that the problem of uneven distribution after gas-liquid two-phase separation caused by the adopted high-height liquid collecting pipe in the prior art is effectively solved, the heat exchange efficiency of the heat exchanger is further improved, and the working performance of.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The heat exchanger is characterized by comprising an integrated liquid distribution assembly, wherein the integrated liquid distribution assembly comprises a first liquid collecting pipe (1) and a plurality of first heat conducting pipes (2) connected with the first liquid collecting pipe (1), each first heat conducting pipe (2) is provided with a first pipe section (21), each first pipe section (21) is parallel to the length direction of the corresponding first liquid collecting pipe (1), when the heat exchanger is used, the length L of each first liquid collecting pipe (1) is in the horizontal direction, each first liquid collecting pipe (1) is provided with an in-pipe height H in the vertical direction, and L is greater than H.

2. A heat exchanger according to claim 1 wherein the first heat conducting tube (2) further has a second tube section (22) connected to one end of the first tube section (21), the first tube section (21) forming an included angle with the second tube section (22), the first heat conducting tube (2) being connected to the first header (1) through the second tube section (22).

3. A heat exchanger according to claim 2 wherein the second tube sections (22) of each of the plurality of first heat conductive tubes (2) are sequentially spaced or staggered along the length of the first header (1).

4. A heat exchanger according to claim 1, wherein any two adjacent ones of the first heat conducting tubes (2) have a first spacing therebetween in the vertical direction, and the minimum value of the first spacing is d, d ≦ H ≦ 2 d.

5. The heat exchanger according to any one of claims 1 to 4, characterized in that the first header pipe (1) comprises a pipe body (11) and a first cover body (12) which is connected to the pipe body (11) and is open at one end of its length, the first cover body (12) having a first inlet (121) thereon.

6. A heat exchanger according to claim 5 wherein the first header (1) further comprises a second cover (13) attached to the length of the tube (11) and open at the other end, the second cover (13) having a first outlet (131) therein, and a second thermally conductive tube (3), one end of the second thermally conductive tube (3) being attached to the first outlet (131).

7. The heat exchanger according to claim 6, characterized in that it further comprises a second header (4), the end of said first heat-conducting pipe (2) and second heat-conducting pipe (3) away from said first header (1) of said liquid-collecting and liquid-separating assembly being in through connection with said second header (4); or the heat collecting and distributing assembly comprises a plurality of groups of liquid collecting and distributing assemblies, and one ends, far away from the first liquid collecting pipe (1), of the first heat conduction pipes (2) and the second heat conduction pipes (3) of any group of the plurality of groups of liquid collecting and distributing assemblies are in through connection with the second liquid collecting pipe (4).

8. An air conditioner comprising a heat exchanger, wherein the heat exchanger is as claimed in any one of claims 1 to 7.

9. An air conditioning system comprising a heat exchanger, wherein the heat exchanger is as claimed in any one of claims 1 to 7.

10. Air conditioning system according to claim 9, further comprising an indoor side heat exchanger (100) having a first header pipe (1) between a second header pipe (4) and the indoor side heat exchanger (100) when the heat exchanger comprises the second header pipe (4).

11. The air conditioning system according to claim 10, further comprising a first throttling element (101), a flow divider (102), said first throttling element (101), flow divider (102) being in turn on a line between said first header pipe (1) and said indoor side heat exchanger (100), and said flow divider (102) being between said first throttling element (101) and said first header pipe (1).