CN213631682U

CN213631682U - Microchannel heat exchanger and air conditioner

Info

Publication number: CN213631682U
Application number: CN202022230835.XU
Authority: CN
Inventors: 王凯; 吴迎文; 杨瑞琦
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-07-06
Anticipated expiration: 2030-10-09

Abstract

The application provides a microchannel heat exchanger and an air conditioner. The micro-channel heat exchanger comprises a heat exchange flat pipe (1), an adapter (2), a first collecting pipe (3) and a second collecting pipe (4), wherein the first collecting pipe (3) is arranged at the first end of the heat exchange flat pipe (1), the second collecting pipe (4) is arranged at the second end of the heat exchange flat pipe (1), the adapter (2) extends along the width direction of the heat exchange flat pipe (1), the adapter (2) is arranged at the first end of the heat exchange flat pipe (1), and the first end of the heat exchange flat pipe (1) is connected to the first collecting pipe (3) through the adapter (2); and/or the adaptor (2) is arranged at the second end of the heat exchange flat pipe (1), and the second end of the heat exchange flat pipe (1) is connected to the second collecting pipe (4) through the adaptor (2). According to the micro-channel heat exchanger, the flow distribution of the refrigerant can be more uniform, and the heat exchange efficiency of the heat exchanger is improved.

Description

Microchannel heat exchanger and air conditioner

Technical Field

The application relates to the technical field of air conditioning, in particular to a micro-channel heat exchanger and an air conditioner.

Background

In the prior art, a microchannel heat exchanger is composed of a plurality of flat tubes, fins connected between the flat tubes, and two collecting pipes connected to both ends of the flat tubes. The micro-channel flow heat exchanger has high heat exchange efficiency, compact structure and more advantages in cost than the common copper tube fin type heat exchanger, and has been widely applied to household and commercial air conditioners as a single-cooler condenser.

However, the diameter of an inner collection hole of the traditional micro-channel heat exchanger must be larger than the width of the flat pipe to complete assembly, so that the inner space of the collection pipe is large, the flow velocity of the refrigerant in the collection pipe can be reduced, the refrigerant is subjected to gas-liquid separation when the heat exchanger is used as an evaporator, liquid is not uniform when the heat exchanger enters the flat pipe, the performance of the heat exchanger is reduced, and meanwhile the filling amount of the refrigerant is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a microchannel heat exchanger and air conditioner, can make the refrigerant that gets into flat pipe divide liquid more evenly, improves the heat exchanger performance, reduces the refrigerant charge volume simultaneously.

In order to solve the above problems, the present application provides a microchannel heat exchanger, comprising a heat exchange flat tube, an adapter, a first collecting pipe and a second collecting pipe, wherein the first collecting pipe is arranged at a first end of the heat exchange flat tube, the second collecting pipe is arranged at a second end of the heat exchange flat tube, the adapter extends along a width direction of the heat exchange flat tube, wherein,

the adapter is arranged at the first end of the heat exchange flat pipe, and the first end of the heat exchange flat pipe is connected to the first collecting pipe through the adapter;

and/or the adapter is arranged at the second end of the heat exchange flat pipe, and the second end of the heat exchange flat pipe is connected to the second collecting pipe through the adapter.

Preferably, the adaptor is provided with a flat pipe groove extending along the length direction, the heat exchange flat pipe is installed in the flat pipe groove, a pipe orifice of the adaptor located at the first end of the heat exchange flat pipe is connected to the first collecting pipe, and/or a pipe orifice of the adaptor located at the second end of the heat exchange flat pipe is connected to the second collecting pipe.

Preferably, the adapter is sealed by a closure remote from the orifice of the manifold.

Preferably, first pressure manifold is the liquid pipe, and the adaptor is connected between the first end of heat transfer flat pipe and liquid pipe, and the diameter of liquid pipe is less than the width of heat transfer flat pipe.

Preferably, the length of the adapter extending into the liquid pipe is half of the radius of the inner hole of the liquid pipe.

Preferably, the adaptor at the first end of the heat exchange flat tube is connected with the heat exchange flat tube in a one-to-one correspondence manner.

Preferably, the liquid pipe forms at least two spaced cavities along the axial, and each cavity all is connected with the adaptor correspondingly.

Preferably, the liquid pipe is provided with at least one partition groove, a spacer is installed in the partition groove, and the spacer is configured to divide the liquid pipe into at least two cavities along the axial direction.

Preferably, the liquid pipe comprises at least two segments arranged at intervals in the axial direction, at least one segment forms a necking structure at the bottom position along the direction from top to bottom, and each segment forms an independent cavity.

According to another aspect of the present application, there is provided an air conditioner including the microchannel heat exchanger described above.

Preferably, the air conditioner further comprises a compressor, a four-way valve, a throttling device and a first heat exchanger, wherein the compressor, the first heat exchanger, the throttling device and the microchannel heat exchanger are sequentially connected, and the four-way valve is arranged at an exhaust port of the compressor.

Preferably, the air conditioner further comprises a flow divider, the first collecting pipe of the micro-channel heat exchanger is a liquid pipe, the first collecting pipe forms at least two cavities arranged at intervals along the axial direction, and the flow dividing ports of the flow divider are connected with the cavities in a one-to-one correspondence manner.

The micro-channel heat exchanger comprises a heat exchange flat pipe, an adapter, a first collecting pipe and a second collecting pipe, wherein the first collecting pipe is arranged at a first end of the heat exchange flat pipe; and/or the adapter is arranged at the second end of the heat exchange flat pipe, and the second end of the heat exchange flat pipe is connected to the second collecting pipe through the adapter. In the application, the adapter is adopted to realize the connection of the collecting pipe and the heat exchange flat pipe, the extension direction of the adapter is consistent with the width direction of the heat exchange flat pipe, the wide edge of the heat exchange flat pipe can be arranged corresponding to the length direction of the adapter, so that the adapter can meet the connection requirement of the heat exchange flat pipe as long as the length of the adapter is larger than the width of the heat exchange flat pipe, and the aperture of the internal circulation hole is larger than the thickness of the heat exchange flat pipe, and the thickness of the heat exchange flat pipe is far smaller than the width of the heat exchange flat pipe, so that the cross section area of the adapter can be greatly reduced, the pipe diameter of the collecting pipe matched with the adapter is further reduced, the inner diameter of the collecting pipe can be smaller than the width of the heat exchange flat pipe, the flow rate of the refrigerant in the collecting pipe can be improved by reducing the inner diameter of the collecting pipe, the refrigerant that makes to enter into in the heat transfer flat tube divides liquid more even, improves the heat exchanger performance, simultaneously because the pressure manifold volume reduces, the refrigerant can quick evenly distributed to the heat transfer flat tube in the pressure manifold, consequently also can reduce the refrigerant volume of filling.

Drawings

FIG. 1 is a schematic perspective view of a microchannel heat exchanger according to one embodiment of the present application;

fig. 2 is a matching structure diagram of an adapter and a first header of a microchannel heat exchanger according to an embodiment of the present application;

fig. 3 is a cross-sectional view of a mating structure of an adapter and a first header of a microchannel heat exchanger according to an embodiment of the present disclosure;

fig. 4 is a schematic view illustrating a refrigerant flow structure of a microchannel heat exchanger according to an embodiment of the present disclosure;

FIG. 5 is a perspective view of a microchannel heat exchanger according to another embodiment of the present application;

fig. 6 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.

The reference numerals are represented as:

1. heat exchange flat tubes; 2. an adapter; 3. a first header; 4. a second header; 5. a flat pipe groove; 6. a sealing member; 7. a blocking groove; 8. a spacer; 9. a necking structure; 10. a compressor; 11. a four-way valve; 12. a throttling device; 13. a first heat exchanger; 14. a flow divider.

Detailed Description

With reference to fig. 1 to 6, according to an embodiment of the present application, a microchannel heat exchanger includes a heat exchange flat tube 1, an adaptor 2, a first header tube 3 and a second header tube 4, the first header tube 3 is disposed at a first end of the heat exchange flat tube 1, the second header tube 4 is disposed at a second end of the heat exchange flat tube 1, the adaptor 2 extends along a width direction of the heat exchange flat tube 1, wherein the adaptor 2 is disposed at the first end of the heat exchange flat tube 1, and the first end of the heat exchange flat tube 1 is connected to the first header tube 3 through the adaptor 2; and/or the adapter 2 is arranged at the second end of the heat exchange flat pipe 1, and the second end of the heat exchange flat pipe 1 is connected to the second collecting pipe 4 through the adapter 2.

In the application, the adapter 2 is adopted to realize the connection between the collecting pipe and the heat exchange flat pipe 1, the extension direction of the adapter 2 is consistent with the width direction of the heat exchange flat pipe 1, the wide edge of the heat exchange flat pipe 1 can be arranged corresponding to the length direction of the adapter 2, so that the adapter 2 can meet the connection requirement of the heat exchange flat pipe 1 as long as the length of the adapter 2 is larger than the width of the heat exchange flat pipe 1 and the aperture of an internal circulation hole is larger than the thickness of the heat exchange flat pipe 1, and the thickness of the heat exchange flat pipe 1 is far smaller than the width of the heat exchange flat pipe 1, so that the cross section area of the adapter 2 can be greatly reduced, the pipe diameter of the collecting pipe matched with the adapter 2 is further reduced, the inner diameter of the collecting pipe can be smaller than the width of the heat exchange flat pipe 1, the flow velocity of a refrigerant in the collecting pipe can be improved, refrigerant gas-liquid layering in the collecting pipe can be effectively slowed down for the refrigerant that enters into in the flat pipe 1 of heat transfer divides liquid more evenly, improves the heat exchanger performance, simultaneously because the collecting pipe volume reduces, the refrigerant can quick evenly distributed to the flat pipe 1 of heat transfer in the collecting pipe, consequently also can reduce the refrigerant and fill the volume.

Be provided with on adaptor 2 along the flat tube groove 5 of length direction extension, flat heat transfer pipe 1 is installed in flat tube groove 5, and the mouth of pipe of adaptor 2 that is located the flat heat transfer pipe 1 first end is connected to first pressure manifold 3, and/or the mouth of pipe of adaptor 2 that is located the flat heat transfer pipe 1 second end is connected to second pressure manifold 4.

Adaptor 2 has for example been the pipe structure, has seted up flat tube groove 5 along circumference on the perisporium of pipe structure, and flat tube 1's tip is installed on flat tube groove 5, and the mouth of pipe structure is connected on the pipe wall of pressure manifold to make flat tube 1 of heat transfer be linked together through pipe structure and pressure manifold. Because the effective connection with heat transfer flat tube 1 just can be realized to the thickness that the hole diameter of pipe structure only need be greater than heat transfer flat tube 1, and the hole diameter of pressure manifold only needs be greater than or equal to the hole diameter of pipe structure, just can realize the effective connection of pressure manifold and pipe structure, consequently can reduce the pipe diameter of pressure manifold by a wide margin for the hole diameter of pressure manifold can be less than heat transfer flat tube 1's width, also can satisfy heat transfer flat tube 1's connection needs.

Adaptor 2 adopts the pipe structure, and simple structure conveniently realizes being connected with heat transfer flat tube 1, also conveniently realizes being connected with the pressure manifold, draws materials and processes all easy realization.

The orifice of the adapter 2 remote from the manifold is sealed by a closure 6. The blocking piece 6 is, for example, an end cover or a plug, and can block the pipe orifice of one end of the adapter piece 2, which is far away from the header pipe, so that the pipe orifice of the end of the adapter piece 2 forms a sealing structure, and refrigerant leakage is avoided. In other embodiments, the adaptor 2 may be directly formed into a tubular structure with one end closed and the other end open.

In one embodiment, the first collecting pipe 3 is a liquid pipe, the adapter 2 is connected between the first end of the flat heat exchange pipe 1 and the liquid pipe, and the diameter of the liquid pipe is smaller than the width of the flat heat exchange pipe 1. In this embodiment, because first pressure manifold 3 is the liquid pipe, and to liquid pipe, when the hole diameter is great, lead to the gas-liquid layering more easily, consequently foretell adaptor 2 is particularly useful for being connected of liquid pipe and heat transfer flat pipe 1, can effectively reduce liquid pipe diameter, can not influence being connected of heat transfer flat pipe 1 and liquid pipe simultaneously.

Because increased adaptor 2 in this application, and adaptor 2's structure can be selected according to the structure size of heat transfer flat pipe 1 and liquid pipe, consequently makes heat transfer flat pipe 1 and liquid pipe all need not change the structure, can adopt the structure of rule relatively, and the processing cost can be effectively controlled with the processing degree of difficulty homoenergetic. Meanwhile, the adaptor 2 only needs to be capable of realizing the link between the heat exchange flat tube 1 and the liquid tube, so that the adaptor 2 only needs to meet the requirement that the inner hole diameter is larger than the thickness of the heat exchange flat tube 1 and smaller than or equal to the inner hole diameter of the liquid tube, and the length of the adaptor 2 is larger than that of the heat exchange flat tube 1, therefore, the adaptor 2 can also adopt a straight tube structure due to no special requirement on the structure of the adaptor 2, the processing difficulty is low, and the realization is easy.

The length that adaptor 2 stretched into the liquid pipe is liquid pipe hole radial half, can guarantee that adaptor 2 inserts the inner chamber in liquid pipe completely, conveniently carries out the flow of refrigerant.

In order to conveniently realize the installation and matching of the adapter 2 and the liquid pipe, when the adapter 2 is of a circular pipe structure, the outer diameter of the adapter 2 is smaller than the inner hole diameter of the liquid pipe.

The adaptor 2 located at the first end of the heat exchange flat tube 1 is connected with the heat exchange flat tube 1 in a one-to-one correspondence manner. In one embodiment, each adapter 2 is an independent individual, each adapter 2 is a circular tube structure, and the adapters 2 are spaced from each other and not connected to each other, so that the structural requirements on the connecting piece 2 are less, and the processing is more convenient.

In other embodiments, a plurality of adapters 2 may be connected together to form an integral structure, for example, the adapters 2 may be grouped into a group two by two, and each group of adapters 2 is fixedly connected together. The adaptor 2 can also adopt other structural forms to realize the connection between the heat exchange flat tube 1 and the liquid tube.

The liquid pipe forms two at least spaced cavitys along the axial, and every cavity all corresponds and is connected with adaptor 2. Through dividing into two at least spaced cavitys with liquid pipe along circumference to make every cavity all have a branch pipe that is connected to the refrigerant pipeline, at the refrigerant flow in-process, when the microchannel heat exchanger uses as the evaporimeter, the refrigerant can directly flow to each cavity in through each branch pipe simultaneously, makes the refrigerant shorten at the flow of intraductal, and the velocity of flow increases, can improve the reposition of redundant personnel homogeneity of refrigerant more effectively, improves the heat transfer performance of heat exchanger. The pipe wall of the liquid pipe is provided with a connector, and the branch pipe is connected to the connector.

In one embodiment, the liquid pipe is provided with at least one partition groove 7, a partition 8 is installed in the partition groove 7, and the partition 8 is configured to divide the liquid pipe into at least two cavities along the axial direction. In this embodiment, the liquid pipe still is an overall structure, has only seted up the wall of liquid pipe and has been used for installing partition groove 7 of spacer 8, when spacer 8 installed in the liquid pipe through separating groove 7, can separate the liquid pipe inner chamber to make the liquid pipe form a plurality of spaced cavitys. For example, the liquid pipe is separated into M cavities by the partition groove 7, wherein M is larger than or equal to 1, each cavity is correspondingly provided with N connecting grooves, N is larger than or equal to 1, the adapter 2 is connected in the connecting grooves, and the flat heat exchange pipe 1 is assembled with the flat pipe groove 5 on the adapter 2.

The axial length of each cavity can be the same or different, and the number of the adapters 2 corresponding to each cavity can be the same or different.

In one embodiment the liquid tube comprises at least two axially spaced segments, at least one of which forms a constriction 9 in the bottom position in the direction from top to bottom, each segment forming an independent cavity. In this embodiment, the liquid pipe is the segmentation structure, and every segmentation all is an independent individual, mutual independence between each segmentation, and each segmentation all is along axial interval setting to realize being connected with corresponding adaptor 2.

The throat structure 9 of segmentation bottom can link to each other with the capillary, and when the refrigerant flowed to second pressure manifold 4 from first pressure manifold 3, can follow the jet of the throat structure 9 department of the segmentation of first pressure manifold 3 and enter into the segmentation inside to further improve the velocity of flow of refrigerant in the segmentation, slow down the layering of refrigerant gas liquid in the segmentation, make the refrigerant that enters into heat transfer flat pipe 1 divide liquid more evenly, improve the heat exchanger performance.

The second collecting pipe 4 is, for example, a gas pipe, and when the second collecting pipe 4 is connected with the flat heat exchange pipe 1 through the adapter 2, the relevant structure is similar to the connection structure of the first collecting pipe 3 and the flat heat exchange pipe 1, and detailed description is omitted here.

Referring to fig. 6 in combination, according to an embodiment of the present application, an air conditioner includes a microchannel heat exchanger, which is the above-described microchannel heat exchanger.

The air conditioner also comprises a compressor 10, a four-way valve 11, a throttling device 12 and a first heat exchanger 13, wherein the compressor 10, the first heat exchanger 13, the throttling device 12 and the micro-channel heat exchanger are sequentially connected, and the four-way valve 11 is arranged at an exhaust port of the compressor 10.

The air conditioner further comprises a flow divider 14, the first collecting pipe 3 of the micro-channel heat exchanger is a liquid pipe, at least two cavities are formed in the first collecting pipe 3 at intervals along the axial direction, and the flow dividing ports of the flow divider 14 are connected with the cavities in a one-to-one correspondence mode.

When the microchannel heat exchanger is used as a condenser, the a and the b of the four-way valve 11 are communicated, the c and the d are communicated, a refrigerant discharged from the compressor 10 passes through the four-way valve 11, then enters the heat exchange flat tube 1 through an air pipe of the microchannel heat exchanger to be condensed and released heat, then flows out through a liquid pipe N path, enters the throttling device 12 to be throttled after being converged by the flow divider 14, then enters the first heat exchanger 13 to be evaporated and absorbed, and then returns to the compressor 10 through the four-way valve 11 to finish circulation.

When the microchannel heat exchanger is used as an evaporator, a of the four-way valve 11 is communicated with c, b is communicated with d, a refrigerant discharged from the compressor 10 enters the first heat exchanger 13 through the four-way valve 11 to be condensed and released heat, then enters the throttling device 12 to be throttled, then is shunted into N paths through the shunt 14 to enter a liquid pipe of the microchannel heat exchanger 6, then enters the heat exchange flat pipe 1 through the liquid pipe to be evaporated and absorbed, then flows out from an outlet of the gas pipe, finally returns to the compressor 10 through the four-way valve 11, and circulation is completed.

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 present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A micro-channel heat exchanger is characterized by comprising a heat exchange flat pipe (1), an adapter (2), a first collecting pipe (3) and a second collecting pipe (4), wherein the first collecting pipe (3) is arranged at the first end of the heat exchange flat pipe (1), the second collecting pipe (4) is arranged at the second end of the heat exchange flat pipe (1), the adapter (2) extends along the width direction of the heat exchange flat pipe (1), wherein,

the adapter (2) is arranged at the first end of the heat exchange flat pipe (1), and the first end of the heat exchange flat pipe (1) is connected to the first collecting pipe (3) through the adapter (2);

and/or, adaptor (2) set up the second end of heat transfer flat pipe (1), the second end of heat transfer flat pipe (1) passes through adaptor (2) are connected on second pressure manifold (4).

2. The micro-channel heat exchanger according to claim 1, wherein the adaptor (2) is provided with a flat tube groove (5) extending along a length direction, the flat heat exchange tube (1) is installed in the flat tube groove (5), a tube opening of the adaptor (2) located at a first end of the flat heat exchange tube (1) is connected to the first collecting tube (3), and/or a tube opening of the adaptor (2) located at a second end of the flat heat exchange tube (1) is connected to the second collecting tube (4).

3. The microchannel heat exchanger according to claim 1, wherein the adapter (2) is sealed by a closure (6) away from the orifice of the header.

4. The microchannel heat exchanger according to claim 1, wherein the first header (3) is a liquid pipe, the adaptor (2) is connected between the first end of the flat heat exchange pipe (1) and the liquid pipe, and the diameter of the liquid pipe is smaller than the width of the flat heat exchange pipe (1).

5. The microchannel heat exchanger of claim 4, wherein the length of the adapter (2) extending into the tube is half the radius of the inner bore of the tube.

6. The microchannel heat exchanger according to claim 4, wherein the adaptor (2) at the first end of the heat exchange flat tube (1) is connected to the heat exchange flat tube (1) in a one-to-one correspondence.

7. The microchannel heat exchanger of claim 4, wherein the liquid tube forms at least two spaced cavities in the axial direction, each cavity being correspondingly connected with the adapter (2).

8. The microchannel heat exchanger according to claim 7, wherein the liquid pipe is provided with at least one partition groove (7), a spacer (8) is installed in the partition groove (7), and the spacer (8) is configured to axially partition the liquid pipe into at least two cavities.

9. The microchannel heat exchanger of claim 7, wherein the liquid tube comprises at least two axially spaced segments, at least one of the segments forming a constriction (9) at a bottom location in a direction from top to bottom, each segment forming a separate cavity.

10. An air conditioner comprising a microchannel heat exchanger, wherein the microchannel heat exchanger is as claimed in any one of claims 1 to 9.

11. The air conditioner according to claim 10, further comprising a compressor (10), a four-way valve (11), a throttling device (12) and a first heat exchanger (13), wherein the compressor (10), the first heat exchanger (13), the throttling device (12) and the microchannel heat exchanger are connected in sequence, and the four-way valve (11) is installed at an exhaust port of the compressor (10).

12. The air conditioner according to claim 11, further comprising a flow divider (14), wherein the first collecting pipe (3) of the microchannel heat exchanger is a liquid pipe, the first collecting pipe (3) forms at least two cavities arranged at intervals along the axial direction, and branch ports of the flow divider (14) are connected with the cavities in a one-to-one correspondence manner.