CN114688765A

CN114688765A - Heat exchanger and air conditioner

Info

Publication number: CN114688765A
Application number: CN202011627786.1A
Authority: CN
Inventors: 王婷
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-07-01

Abstract

An embodiment of the present invention provides a heat exchanger and an air conditioner, the heat exchanger including: the pressure manifold specifically includes: a first chamber; the plurality of second cavities are arranged outside the first cavities; the heat exchange tubes are arranged at intervals, one end of each heat exchange tube extends into the second cavity, and the heat exchange tubes are communicated with the second cavity; the medium flows into the first chamber through the first distribution hole and then flows into the second chamber through the second distribution hole. According to the technical scheme, the medium is redistributed twice, so that the physical properties of the medium are more uniform, the physical properties of the medium flowing into different heat exchange tubes are more uniform when the medium finally enters the heat exchange tubes, the different heat exchange tubes can fully exchange heat for the medium, and the overall heat exchange efficiency of the heat exchanger is improved.

Description

Heat exchanger and air conditioner

Technical Field

The invention relates to the technical field of air conditioning equipment, in particular to a heat exchanger and an air conditioner.

Background

The existing micro-channel heat exchanger generally comprises an inlet collecting pipe, an outlet collecting pipe, and a plurality of groups of heat exchange flat pipes and fins which are parallel to each other between the inlet collecting pipe and the outlet collecting pipe. The refrigerant is firstly distributed into a plurality of heat exchange tubes in the inner cavity of the inlet collecting pipe along the axial direction. Then, after the refrigerant in each heat exchange tube exchanges heat with the air outside the tube, the refrigerant converges in the outlet collecting pipe and flows out of the heat exchanger.

The uniformity of refrigerant distribution among the heat exchange tubes is of great importance to the heat exchange performance. The use of microchannel heat exchangers in evaporators presents a more significant impediment to refrigerant distribution problems than microchannel condensers.

Typically, the refrigerant entering the evaporator is a two-phase flow. The gas phase and the liquid phase in the two-phase flow have different physical properties and flow rates and are subjected to different influences of internal and external forces. When the refrigerant is shunted to each heat exchange tube from the inlet collecting tube, gas-liquid separation can continuously occur along with the reduction of the main flow, thereby not only influencing the mass flow distribution of the refrigerant in each heat exchange tube, but also influencing the uniformity of the liquid content of the refrigerant in each tube.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of this, a first aspect of an embodiment of the present invention provides a heat exchanger.

A second aspect of an embodiment of the present invention provides an air conditioner.

To achieve the above object, an embodiment of a first aspect of the present invention provides a heat exchanger, including: the pressure manifold specifically includes: a first chamber; the plurality of second cavities are arranged outside the first cavities; the heat exchanger also comprises a plurality of heat exchange tubes which are arranged at intervals, one end of each heat exchange tube extends into the second chamber, and the heat exchange tubes are communicated with the second chamber; a distributor, one end of which extends into the first chamber,

the medium flows into the first chamber through the first distribution hole and then flows into the second chamber through the second distribution hole.

According to an embodiment of the first aspect of the present invention, a heat exchange tube is provided, which includes a collecting pipe, the collecting pipe includes a first chamber and a plurality of second chambers disposed outside the first chamber, one end of a distributor extends into the first chamber, a first distribution hole is disposed on the distributor, and a medium in the distributor can enter the first chamber through the first distribution hole. Wherein the distributor serves to introduce the medium from the outside into the first chamber. The first chamber is provided with a second distribution hole communicated with the second chamber, and the fluid flowing into the first chamber from the first distribution hole can flow into the plurality of second chambers outside the first chamber from the second distribution hole. In addition, a plurality of heat exchange tubes are arranged at intervals, and one end of the first heat exchange tube extends into the second chamber and is communicated with the second chamber. Therefore, the medium flowing into the second chamber can further flow into the heat exchange pipe to exchange heat. The medium flows from the distributor into the first chamber, then flows through the first chamber into the second chamber, and then enters the heat exchange tube. The medium is redistributed twice, the physical properties of the medium are more uniform, when the medium finally enters the heat exchange tubes, the physical properties of the medium flowing into different heat exchange tubes are more uniform, different heat exchange tubes can both perform sufficient heat exchange on the medium, and the overall heat exchange efficiency of the heat exchanger is improved.

Generally, the distributor is in the shape of a long pipe, and the first distribution holes are distributed along the extension direction of the distributor, so that when the medium flows into the first chamber from the distributor, the medium can directly flow to a wider area in the first chamber, and then can be quickly and uniformly distributed in the first chamber.

Generally, when the medium is a refrigerant. Refrigerant from the distributor enters the first chamber and collects in the first chamber. The refrigerant has fluidity and flows in the first chamber, so that the liquid level of the refrigerant in the same horizontal direction in the first chamber can be at a similar height, and the refrigerant can simultaneously flow to a plurality of second chambers. It will be appreciated that the refrigerant that is redistributed to the second chamber after having been collected in the first chamber is more uniform than if it were to flow directly into the second chamber. Especially when the refrigerant entering the heat exchanger contains both a gaseous and a liquid phase, the refrigerant will undergo a primary separation in the first chamber. Because the liquid has fluidity, the liquid refrigerant can flow in the first chamber, so that the liquid phase part of the refrigerant is uniformly distributed in the first chamber and then synchronously flows to the plurality of second chambers. Further, since the refrigerant is uniformly distributed into the plurality of second chambers, the refrigerant flowing from the second chambers into the heat exchange tubes is relatively uniform. Generally speaking, the refrigerant that gas phase and liquid phase proportion are different influences very obviously to the heat transfer effect of heat exchange tube, consequently, through setting up first cavity and second cavity, makes the gas phase and the liquid phase's of the refrigerant that gets into different heat exchange tubes ratio remain stable even, can effectual improvement heat exchange efficiency to improve the heat transfer performance of heat exchanger.

It should be noted here that the cross sections of the first chamber and the second chamber may be circular, elliptical, square, etc., as long as the medium can be ensured to flow sufficiently in the chamber, and the effect of uniform distribution of the medium can be achieved in different shapes.

An embodiment of a second aspect of the present invention provides an air conditioner, including: a housing; a heat exchanger as in any one of the embodiments of the first aspect above, disposed within the housing.

According to a second aspect of the present invention, there is provided an air conditioner comprising a housing, a heat exchanger as described above in the first aspect, disposed within the housing. The heat exchanger may be used to exchange heat with a refrigerant of an air conditioner.

In addition, the air conditioner includes any heat exchanger of the first aspect, so any beneficial effect of the embodiment of the first aspect is achieved, and details are not repeated here.

Additional aspects and advantages of the invention 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 invention.

Drawings

FIG. 1 shows a schematic structural diagram of a heat exchanger according to one embodiment of the present invention;

FIG. 2 shows a schematic cross-sectional view of a heat exchanger according to an embodiment of the invention;

fig. 3 shows a schematic cross-sectional view of a header of a heat exchanger according to an embodiment of the invention;

FIG. 4 shows a schematic end view of a header of a heat exchanger according to an embodiment of the invention;

fig. 5 illustrates a schematic configuration of an air conditioner according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:

100: a heat exchanger; 102: a collecting pipe; 104: a first chamber; 106: a second chamber; 108: a heat exchange pipe; 110: a dispenser; 112: a first dispensing orifice; 114: a second dispensing aperture; 116: a first angle; 118: a second angle; 120: a mixing chamber; 130: positioning a groove; 200: an air conditioner; 202: a housing.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced otherwise than as specifically described herein, and the scope of the present application is not limited by the specific details disclosed herein.

Some embodiments according to the invention are described below with reference to fig. 1 to 5.

Example one

As shown in fig. 1, the present embodiment proposes a heat exchanger 100: the collecting pipe 102 comprises a collecting pipe 102, wherein the collecting pipe 102 comprises a first chamber 104 and a plurality of second chambers 106 arranged outside the first chamber 104, one end of a distributor 110 extends into the first chamber 104, a first distributing hole 112 is formed in the distributor 110, and a medium in the distributor 110 can enter the first chamber 104 through the first distributing hole 112. Wherein the distributor 110 serves to introduce the medium from the outside into the first chamber 104. The first chamber 104 is provided with a second distribution hole 114 communicating with the second chamber 106, and the fluid flowing from the first distribution hole 112 into the first chamber 104 can flow from the second distribution hole 114 into the plurality of second chambers 106 outside the first chamber 104. In addition, a plurality of heat exchange pipes 108 are disposed at intervals, and one end of the first heat exchange pipe 108 extends into the second chamber 106 to communicate with the second chamber 106. Therefore, the medium flowing into the second chamber 106 can further flow into the heat exchange pipe 108 to exchange heat. The medium flows from the distributor 110 into the first chamber 104, then through the first chamber 104 into the second chamber 106, and then into the heat exchange tubes 108. The medium is redistributed twice, the physical properties of the medium are more uniform, and the physical properties of the medium flowing into different heat exchange tubes 108 are more uniform when the medium finally enters the heat exchange tubes 108, so that the different heat exchange tubes 108 can fully exchange heat for the medium, and the overall heat exchange efficiency of the heat exchanger 100 is improved.

The number of the first distribution holes 112 and the second distribution holes 114 may be one or more.

Generally, the distributor 110 is in the shape of an elongated tube, and the first distribution holes 112 are distributed along the extending direction of the distributor 110, so that when the medium flows into the first chamber 104 from the distributor 110, the medium can directly flow to a wider area in the first chamber 104, and thus can be quickly and uniformly distributed in the first chamber 104.

Generally, when the medium is a refrigerant. As the refrigerant enters the first chamber 104 from the distributor 110, it collects in the first chamber 104. Since the refrigerant has fluidity, it flows in the first chamber 104, and the refrigerant flows to the plurality of second chambers 106 simultaneously while the liquid level of the refrigerant in the same horizontal direction in the first chamber 104 is kept at a similar height. It will be appreciated that the refrigerant that is redistributed to the second chamber 106 after being collected in the first chamber 104 is more uniform than the refrigerant that is directed into the second chamber 106. Particularly when the refrigerant entering the heat exchanger 100 contains both a vapor phase and a liquid phase, the refrigerant undergoes a primary separation in the first chamber 104. Because the liquid has fluidity, the liquid refrigerant will flow in the first chamber 104, so that the liquid phase part of the refrigerant is uniformly distributed in the first chamber 104 and then synchronously flows to the plurality of second chambers 106. Further, since the refrigerant is uniformly distributed into the plurality of second chambers 106, the refrigerant flowing from the second chambers 106 to the heat exchange tubes 108 is relatively uniform. Generally speaking, the refrigerant with different gas-phase and liquid-phase proportions has a very obvious influence on the heat exchange effect of the heat exchange tube 108, so that the proportion of the gas phase and the liquid phase of the refrigerant entering the different heat exchange tubes 108 is kept stable and uniform by arranging the first chamber 104 and the second chamber 106, the heat exchange efficiency can be effectively improved, and the heat exchange performance of the heat exchanger 100 can be improved.

It should be noted that the cross section of the first chamber 104 and the second chamber 106 may be circular, elliptical, square, etc. as long as it can ensure that the medium can flow sufficiently in the chambers, and the different shapes can achieve the effect of uniform distribution of the medium.

In a more specific embodiment, the header is oriented horizontally or within 30 ° of horizontal.

Example two

As shown in fig. 1, the present embodiment proposes a heat exchanger 100: the collecting main 102 includes a collecting main 102, the collecting main 102 includes a first chamber 104 and a plurality of second chambers 106 disposed outside the first chamber 104, one end of a distributor 110 extends into the first chamber 104, a first distributing hole 112 is disposed on the distributor 110, and a medium in the distributor 110 can enter the first chamber 104 through the first distributing hole 112. Wherein the distributor 110 serves to introduce the medium from the outside into the first chamber 104. The first chamber 104 is provided with a second distribution hole 114 communicating with the second chamber 106, and the fluid flowing from the first distribution hole 112 into the first chamber 104 can flow from the second distribution hole 114 into the plurality of second chambers 106 outside the first chamber 104. In addition, a plurality of heat exchange pipes 108 are disposed at intervals, and one end of the first heat exchange pipe 108 extends into the second chamber 106 to communicate with the second chamber 106. Therefore, the medium flowing into the second chamber 106 can further flow into the heat exchange pipe 108 to exchange heat. The medium flows from the distributor 110 into the first chamber 104, then through the first chamber 104 into the second chamber 106, and then into the heat exchange tubes 108. The medium is redistributed twice, the physical properties of the medium are more uniform, and the physical properties of the medium flowing into different heat exchange tubes 108 are more uniform when the medium finally enters the heat exchange tubes 108, so that the different heat exchange tubes 108 can fully exchange heat for the medium, and the overall heat exchange efficiency of the heat exchanger 100 is improved.

Further, the extension of the distributor 110 within the first chamber 104 is directional. It is clear that the medium will be first distributed in the direction in which the distributor 110 extends and then be made uniform by the flow in the first chamber 104. It will be appreciated that the media will be more fully flowed and more uniformly distributed in the direction of extension of the distributor 110. The plurality of second chambers 106 are provided along the extending direction of the distributor 110, and the medium entering the plurality of second chambers 106 can be made uniform in physical properties.

In particular, when the medium is a refrigerant, it is possible to avoid that the physical properties of the refrigerant flowing into the second chamber 106 are significantly different from those of other positions and the heat exchange effect of the heat exchanger 100 is affected because the second chamber 106 is located away from the extending direction of the distributor 110.

EXAMPLE III

Generally, when the medium is a refrigerant. As the refrigerant enters the first chamber 104 from the distributor 110, it collects in the first chamber 104. Since the refrigerant has fluidity, it flows in the first chamber 104, and the refrigerant flows to the plurality of second chambers 106 simultaneously while the liquid level of the refrigerant in the same horizontal direction in the first chamber 104 is kept at a similar height. It will be appreciated that the refrigerant that is redistributed to the second chamber 106 after being collected in the first chamber 104 is more uniform than the refrigerant that is directed into the second chamber 106. Particularly when the refrigerant entering the heat exchanger 100 contains both a vapor phase and a liquid phase, the refrigerant undergoes a primary separation in the first chamber 104. Because the liquid has fluidity, the liquid refrigerant will flow in the first chamber 104, so that the liquid phase part of the refrigerant is uniformly distributed in the first chamber 104 and then synchronously flows to the plurality of second chambers 106. Further, since the refrigerant is uniformly distributed into the plurality of second chambers 106, the refrigerant flowing from the second chambers 106 to the heat exchange tubes 108 is relatively uniform. Generally speaking, the refrigerant with different gas-phase and liquid-phase ratios has a very obvious influence on the heat exchange effect of the heat exchange tubes 108, so that the ratio of the gas phase and the liquid phase of the refrigerant entering the different heat exchange tubes 108 is kept stable and uniform by arranging the first chamber 104 and the second chamber 106, the heat exchange efficiency can be effectively improved, and the heat exchange performance of the heat exchanger 100 is improved.

Further, the first distribution holes 112 of the distributor 110 are provided at a side close to the heat exchange pipe 108, and the second distribution holes 114 are provided at a side of the first chamber 104 remote from the heat exchange pipe 108. It is clear that the medium exiting the distributor 110 does not enter the heat exchange tube 108 directly, but instead enters the first chamber 104, then the second chamber 106, and then the heat exchange tube 108. It will be appreciated that in this process, the media may improve its uniformity. In addition, the medium in the first chamber 104 along the direction of the distributor 110 may also flow in the first chamber 104 to improve the uniformity of the medium in the first chamber 104 and the second chamber 106.

Example four

It should be noted that the cross section of the first chamber 104 and the second chamber 106 may be circular, or may also be oval, square, etc., and as long as it can ensure that the medium can sufficiently flow in the chambers, the effect of uniformly distributing the medium can be achieved by different shapes.

Further, the extension of the dispenser 110 within the first chamber 104 is directional. It will be apparent that the medium will be distributed first in the direction in which the distributor 110 extends and then be made uniform by the flow in the first chamber 104. It will be appreciated that the media will be more fully flowed and more uniformly distributed in the direction of extension of the distributor 110. The plurality of second chambers 106 are provided along the extending direction of the distributor 110, and the medium entering the plurality of second chambers 106 can be made uniform in physical properties.

Further, the first distribution holes 112 of the distributor 110 are provided at a side close to the heat exchange pipe 108, and the second distribution holes 114 are provided at a side of the first chamber 104 away from the heat exchange pipe 108. It is clear that the medium exiting the distributor 110 does not enter the heat exchange tube 108 directly, but instead enters the first chamber 104, then the second chamber 106, and then the heat exchange tube 108. It will be appreciated that in this process, the media may improve its uniformity. In addition, the medium in the first chamber 104 along the direction of the distributor 110 may also flow in the first chamber 104 to improve the uniformity of the medium in the first chamber 104 and the second chamber 106.

Further, as shown in fig. 2, the distributor 110 extends into the first chamber 104 in a horizontal direction, so that the medium can enter the first chamber 104 at the same height. Extending into the first chamber 104 in a vertical, oblique, etc. direction relative to the distributor 110, and extending into the first chamber 104 in a horizontal direction, facilitates the separation of the media up and down within the first chamber 104. Particularly for a medium containing two phases, gas and liquid, the horizontally extending distributor 110 makes it easier to separate media of different phases in the first chamber 104.

A first angle 116 is formed between the center line of the first distribution hole 112 and the vertical center line of the cross section of the distributor 110, and the first angle 116 is 0-60 degrees. It is apparent that the first distribution holes 112 are holes provided in an upward direction of the distributor 110, and thus, the medium flowing out of the first distribution holes 112 flows upward. The first distribution holes 112, which are disposed upward with respect to the downward direction, allow the medium to travel a longer flow distance and achieve uniform mixing during the flow turning back.

Specifically, when the medium is in a gas-liquid two-phase mixed state, the medium is ejected from the first distribution holes 112, so that the medium can be uniformly sprayed in the first chamber 104 perpendicular to the extending direction of the distributor 110.

Further, the center line of the second distribution hole 114 is at a second angle 118 with the vertical center line, and the second angle 118 is 0 ° to 90 °. It should be noted that when the second angle 118 is smaller than 90 ° and larger than 0 °, the media flowing out from the second distribution holes 114 is in a diagonally downward direction, and when the second angle 118 is 90 °, the flowing out direction is in a lateral direction. It is apparent that the media flowing from the second distribution holes 114 having the second angle 118 can rapidly disperse the media in the second chamber 106 to ensure uniformity of the media entering the heat exchange tube 108.

EXAMPLE five

Generally, when the medium is a refrigerant. As the refrigerant enters the first chamber 104 from the distributor 110, it collects in the first chamber 104. Since the refrigerant has fluidity, it flows in the first chamber 104, and the refrigerant flows to the plurality of second chambers 106 simultaneously while the liquid level of the refrigerant in the same horizontal direction in the first chamber 104 is kept at a similar height. It will be appreciated that the refrigerant that is redistributed to the second chamber 106 after being collected in the first chamber 104 is more uniform than the refrigerant that is directed into the second chamber 106. Especially when the refrigerant entering the heat exchanger 100 contains both a gas phase and a liquid phase, the refrigerant undergoes a primary separation in the first chamber 104. Because of the fluidity of the liquid, the liquid refrigerant flows in the first chamber 104, so that the liquid phase part of the refrigerant is uniformly distributed in the first chamber 104 and then synchronously flows to the plurality of second chambers 106. Further, since the refrigerant is uniformly distributed into the plurality of second chambers 106, the refrigerant flowing from the second chambers 106 to the heat exchange tubes 108 is relatively uniform. Generally speaking, the refrigerant with different gas-phase and liquid-phase proportions has a very obvious influence on the heat exchange effect of the heat exchange tube 108, so that the proportion of the gas phase and the liquid phase of the refrigerant entering the different heat exchange tubes 108 is kept stable and uniform by arranging the first chamber 104 and the second chamber 106, the heat exchange efficiency can be effectively improved, and the heat exchange performance of the heat exchanger 100 can be improved.

Further, the extension of the dispenser 110 within the first chamber 104 is directional. It is clear that the medium will be first distributed in the direction in which the distributor 110 extends and then be made uniform by the flow in the first chamber 104. It will be appreciated that the media will be more fully flowed and more uniformly distributed in the direction of extension of the distributor 110. The plurality of second chambers 106 are provided along the extending direction of the distributor 110, and the medium entering the plurality of second chambers 106 can be made uniform in physical properties.

A first angle 116 is formed between the center line of the first distributing hole 112 and the vertical center line of the cross section of the distributor 110, and the first angle 116 is 0-60 degrees. It is apparent that the first distribution holes 112 are holes provided in an upward direction of the distributor 110, and thus, the medium flowing out of the first distribution holes 112 flows upward. The first distribution holes 112, which are arranged upward relative to the downward direction, allow the medium to travel a longer flow distance and achieve uniform mixing during the flow turning back.

Further, the center line of the second distribution hole 114 is at a second angle 118 with the vertical center line, and the second angle 118 is 0 ° to 90 °. It should be noted that when the second angle 118 is smaller than 90 ° and larger than 0 °, the media flowing out from the second distribution holes 114 is in a diagonally downward direction, and when the second angle 118 is 90 °, the flowing out direction is in a lateral direction. It is apparent that the medium flowing out of the second distribution holes 114 having the second angle 118 allows the medium to be rapidly dispersed in the second chamber 106 to ensure uniformity of the medium entering the heat exchange pipe 108.

Further, the distributor 110 is provided near one side of the heat exchange pipe 108, i.e., at an interface perpendicular to the axis of the first chamber 104, i.e., a cross section of the first chamber 104, and when the heat exchange pipe 108 is provided at an upper side of the distributor, the distributor is located at an upper middle portion in the first chamber 104, and it is apparent that the medium flowing out of the distributor 110 does not directly enter the heat exchange pipe 108, but enters the first chamber 104, and then enters the second chamber 106, and then enters the heat exchange pipe 108. In this process, in order to improve the uniformity of entering the heat exchange pipe 108, the distance of entering the heat exchange pipe 108 should be increased. It will be appreciated that the provision of the distributor 110 on the side adjacent to the heat exchange tube 108 increases the distance of flow of the medium in the first chamber 104 to achieve uniformity of the medium within the first chamber 104.

Further, the first chamber 104 is tubular and, as media enters the first chamber 104 from the distributor 110, the media is more likely to pool at the bottom of the tubular structure than other shapes to facilitate media flow into the second chamber 106. Furthermore, the distributor 110 extends horizontally into the first chamber 104, with the horizontal axis of the distributor 110 being higher than the horizontal axis of the first chamber 104, it being understood that such an arrangement allows the fluid to travel a longer distance when flowing from the distributor 110 into the bottom of the first chamber 104, thereby improving the uniformity of the medium reaching the bottom of the first chamber 104.

EXAMPLE six

Further, the extension of the distributor 110 within the first chamber 104 is directional. It will be apparent that the medium will be distributed first in the direction in which the distributor 110 extends and then be made uniform by the flow in the first chamber 104. It will be appreciated that the media will be more fully flowed and more uniformly distributed in the direction of extension of the distributor 110. The plurality of second chambers 106 are provided along the extending direction of the distributor 110, and the medium entering the plurality of second chambers 106 can be made uniform in physical properties.

Further, as shown in fig. 2, the distributor 110 extends into the first chamber 104 in a horizontal direction, so that the medium can enter the first chamber 104 at the same height. The vertical and oblique directions relative to the distributor 110 into the first chamber 104, and the horizontal direction into the first chamber 104, are more favorable for the medium to be separated up and down in the first chamber 104. Particularly for a medium containing two phases, gas and liquid, the horizontally extending distributor 110 makes it easier to separate media of different phases in the first chamber 104.

Further, the distributor 110 is disposed at a side adjacent to the heat exchange pipe 108, and it is apparent that the medium flowing out of the distributor 110 does not directly enter the heat exchange pipe 108, but enters the first chamber 104, then enters the second chamber 106, and then enters the heat exchange pipe 108. In this process, in order to improve the uniformity of the entering into the heat exchange pipe 108, the distance of the entering into the heat exchange pipe 108 should be increased. It will be appreciated that providing the distributor 110 on a side adjacent to the heat exchange tubes 108 increases the distance the medium flows in the first chamber 104 to achieve uniformity of the medium within the first chamber 104.

Further, the number of the first distribution holes 112 is plural, so that the medium can rapidly flow into the first chamber from the plural distribution holes. Generally, the distributor 110 extends into the first chamber 104 for a certain distance, and the first distribution holes 112 are formed in the distributor 110, so that the medium can flow to different positions of the first chamber 104 more rapidly and uniformly, and the uniformity of the medium in the first chamber 104 can be improved.

The first distribution holes 112 on the same cross section of the distributor 110 include at least one, which can make the medium flow out in all directions, so that the medium can flow out in different axial directions of the distributor 110, the medium can be distributed more uniformly in the axial direction of the first chamber 104, and when two first distribution holes 112 are selected to be arranged on the same cross section, the distribution effect of the distributor on the medium is better.

Further, the number of the second distribution holes 114 is plural, and the medium in the first chamber 104 can be rapidly flowed into the second chamber 106. Since there are a plurality of second chambers 106, and a plurality of second distribution holes 114 are disposed on the first chamber 104, the medium in the first chamber 104 can flow into different second chambers 106 simultaneously and rapidly, so as to ensure uniformity of the medium between different second chambers 106.

In addition, the number of the second distribution holes 114 in the same cross section of the first chamber 104 is at least two, which enables the medium in the first chamber 104 to rapidly flow to different axial directions of the second chamber 106, so that the uniformity of the axial direction of the medium in the second chamber 106 is improved, and when two second distribution holes 114 are selected in the same cross section, the distribution effect of the distributor on the medium is improved.

Further, the second dispensing hole 114 is provided extending along the dispenser 110 such that the direction in which the second dispensing hole 114 is provided coincides with the extending direction of the dispenser 110. This allows the medium to flow from the first chamber 104 into the different second chambers 106 simultaneously without being trapped in the first chamber 104, which also ensures a relatively uniform medium between the different second chambers 106. In addition, the second distribution holes 114 are uniformly spaced along the extension direction of the distributor 110, which may improve the efficiency of the medium flowing from the first chamber 104 into the second chamber 106.

Further, the medium entering the second chamber 106 will eventually enter the heat exchange tube 108 to exchange heat with the medium. A portion of the second distribution holes 114 is located on the same cross section of the first chamber 104 as the heat exchange pipe 108, so that the medium flowing out of the second distribution holes 114 can enter the heat exchange pipe 108 from the second chamber 106 more smoothly to facilitate the heat exchange of the medium.

Further, a mixed flow chamber 120 is provided at one side of the collecting main 102, one or more heat exchanging pipes 108 are communicated with the mixed flow chamber 120, and the medium flows into the mixed flow chamber 120 through the heat exchanging pipes 108. The mixed flow chamber 120 is a chamber for receiving a medium that exchanges heat through the heat exchange pipe 108. The heat exchanger 100 is used for exchanging heat of a medium through the heat exchange pipe 108, and finally collecting the heat exchanged medium. The mixed flow chamber 120 is a chamber for receiving the medium flowing out after the heat exchange from the heat exchange pipe 108. It can be understood that, since the media exchange heat in different heat exchange tubes 108, the heat exchange effect of the media flowing out from the heat exchange tubes 108 may be different, and therefore, the media flowing out from the heat exchange tubes 108 are finally gathered in the mixed flow chamber 120, and the final temperature uniformity of the media can be realized.

In addition, the mixing chamber 120 is disposed at one side of the collecting main 102, so that the structure of the heat exchanger 100 is more compact and the pipe design of the heat exchanging pipe 108 is simpler.

Further, the first chamber 104 and the second chamber 106 need to be tightly fitted to each other to ensure that no leakage occurs when the medium flows. The first chamber 104 and the second chamber 106 are integrally formed, so that the sealing performance between the two chambers can be ensured, and the medium can be prevented from leaking. Especially for media such as refrigerants, leakage from the media can be prevented, and the ability of the interior of the first chamber 104 and the second chamber 106 to withstand pressure can be improved.

EXAMPLE seven

As shown in fig. 5, the present embodiment provides an air conditioner 200, which includes a housing 202, such as the heat exchanger 100 of any of the above embodiments, disposed in the housing 202. The heat exchanger 100 may be used to exchange heat of refrigerant of the air conditioner 200.

In addition, the air conditioner 200 includes any heat exchanger 100 in any of the above embodiments, so any beneficial effect in the above embodiments is achieved, and details are not repeated herein.

Example eight

As shown in fig. 1, the present embodiment provides a heat exchanger, which includes an inlet header (i.e., header 102), an outlet header, a refrigerant distributor in the header, and a plurality of sets of heat exchange tubes and heat exchange fins between the headers. A plurality of parallel refrigerant microchannels are typically disposed within each heat exchange tube. Header for refrigerant distribution in heat exchangers, typically inlet header: including inner and outer tube walls and a refrigerant primary distributor (i.e., distributor 110) inserted into the header cavity (i.e., first chamber 104). The refrigerant primary distributor is located at the middle upper part of the inner cavity. The primary dispensing orifice (i.e., the first dispensing orifice 112) is disposed in the upper middle of the dispenser, and there may be 1-2 dispensing orifices in the same cross section. The two-phase flow refrigerant is sprayed from the primary distribution hole and collides with the inner wall of the collecting pipe, gas and liquid are separated, the gaseous refrigerant is gathered at the upper part of the inner cavity, and the liquid refrigerant forms a liquid pool at the bottom of the inner cavity. The two-phase flow refrigerant is sprayed into the inner cavity, sufficient phase separation conditions exist, the gaseous refrigerant is gathered at the upper part, a stable liquid pool is formed at the bottom part, and the middle part is a gas-liquid mixture. Meanwhile, in the communicated inner cavity, under the same pressure environment, the accumulated phase refrigerants are uniformly distributed along the axis of the collecting pipe, so that the phenomenon that the refrigerant is unevenly distributed along the axis in the collecting pipe due to overlong collecting pipe or overlong heat exchange pipe and the like, and further the refrigerant among the heat exchange pipes is unevenly distributed is avoided.

The outer chamber (i.e., the second chamber 106) between the outer and inner walls of the inlet manifold is divided into a plurality of chambers separated from each other along the axis of the manifold. In each cavity, the top of the outer wall surface of the collecting pipe is provided with a plurality of heat exchange pipe interfaces. The secondary distribution holes (i.e., the second distribution holes 114) are arranged at the bottom of the inner pipe wall of the collecting main at positions corresponding to the heat exchange pipes. As shown in FIG. 2, 1-3 secondary dispensing holes can be arranged on the same cross-section. Liquid and gas refrigerants enter the independent chambers at high speed through the distribution holes in the inner wall of the collecting pipe. The space of the cavity is small, and the injected fluid and the fluid in the cavity can be uniformly distributed to the heat exchange tubes connected with the cavity after being fully mixed, so that the heat exchange tubes and the external air realize convective heat exchange. The corresponding distribution hole of each chamber is simple in design and easy to standardize.

The angle alpha (i.e. the first angle 116) between the centre line of the primary dispensing aperture and the vertical centre line of the dispenser cross-section is in the range 0 deg., 60 deg..

The primary distributor is horizontally arranged in the inner cavity of the collecting pipe, and the horizontal axis of the primary distributor is higher than that of the inner cavity of the collecting pipe.

The range of the included angle beta (namely the second angle 118) between the central line of the secondary distribution hole and the vertical central line of the cross section of the inner wall of the collecting main is [0 DEG, 90 deg ].

In each chamber, the secondary distribution holes can be uniformly distributed along the axial direction of the collecting pipe, and preferably, the positions of the secondary distribution holes can correspond to the positions of the heat exchange pipes.

The minimum distance between the inner wall of the collecting pipe and a plane formed by the section of the pipe orifice of the heat exchange pipe extending into the inlet collecting pipe is not less than the minimum distance between the outer wall surface of the distributor and the inner wall surface of the collecting pipe.

The distributor provided by the embodiment does not need to be subjected to excessive iterative design according to structural changes of the heat exchanger (the number of heat exchange tubes, the length of the tubes, the number of rows of the tubes, a wind field and the like).

The problems of gas-liquid separation and uneven refrigerant distribution in the flow dividing process of the collecting pipe refrigerant caused by overlong collecting pipe or heat exchange pipe are solved through the mixing-distributing-mixing-redistributing process of the refrigerant in the distributor and the inner and outer cavities of the collecting pipe. The scheme realizes the uniform distribution of the refrigerant two-phase flow in the micro-channel heat exchanger, improves the utilization rate of the heat exchange area and improves the heat exchange efficiency.

The cross section of the collecting pipe and the distributor can be circular, oval, square or other polygonal shapes. The shape of the dispensing hole can be circular, oval, square, or other polygonal shapes.

The present embodiment can be used as an evaporator suitable for high-pressure refrigerants such as R410A, R32, and the like.

In another specific embodiment, the heat exchanger may be applied to refrigerant two-phase flow distribution in the intermediate header section of an evaporator or condenser, as shown in FIG. 1, in addition to refrigerant two-phase flow distribution in the inlet header of an evaporator. In addition, the medium to which the present invention is applied may be a refrigerant, or may be a distribution of other mixed fluids (e.g., a mixed solution of a refrigerant and oil).

The chambers between the inner wall and the outer wall of the collecting pipe are separated, and various modes can be adopted to prevent the refrigerant from flowing and transferring between the chambers, so that the split phase of the refrigerant or uneven distribution of the refrigerant is avoided. For a unitary manifold, the chamber separation may be mechanical. In the first mode, after the inner wall and the outer wall of the collecting pipe are positioned in parallel, the outer wall surface is rolled inwards at the separated position, and the inner wall surface is expanded outwards, so that the sealed connection of the inner wall surface and the outer wall surface at the separated position is realized. In the second mode, the separating sheet can also be adopted and connected with the inner wall surface and the outer wall surface of the collecting pipe in a bayonet or welding mode, so that the separation of the chambers is realized. In a third mode, for the standard segmented pipe sections of the inner and outer collecting pipes, as shown in fig. 3, the inner and outer pipe sections can be directly lapped and brazed, or a separating chamber can be obtained by adding a separating sheet to the inner and outer pipe sections and brazing. The third mode enables the design and the manufacture of the collecting pipe with the distributor to be simpler, easier and more efficient. Wherein fig. 4 is a header end view, and the positioning groove 130 is used for positioning the header.

According to the embodiment of the heat exchanger and the air conditioner, the medium is redistributed twice, the physical properties of the medium are more uniform, the physical properties of the medium flowing into different heat exchange tubes are more uniform when the medium finally enters the heat exchange tubes, the different heat exchange tubes can fully exchange heat for the medium, and the overall heat exchange efficiency of the heat exchanger is improved.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit referred to must have a specific direction, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchanger, comprising:

a header, the header specifically comprising:

a first chamber;

a plurality of second chambers disposed outside the first chambers;

the heat exchange tubes are arranged at intervals, one end of each heat exchange tube extends into the second cavity, and the heat exchange tubes are communicated with the second cavity;

a distributor having one end extending into the first chamber,

the distributor is provided with a first distribution hole, the first chamber is provided with a second distribution hole communicated with the second chamber, and the medium flows into the first chamber through the first distribution hole and then flows into the second chamber through the second distribution hole.

2. The heat exchanger according to claim 1, wherein a plurality of the second chambers are arranged along an extending direction of the distributor, and each of the second chambers communicates with at least one of the heat exchange tubes.

3. The heat exchanger of claim 1,

the first distribution hole is formed in one side, close to the heat exchange tube, of the distributor;

the second distribution hole is arranged on one side of the first chamber far away from the heat exchange tube.

4. The heat exchanger of claim 3, wherein the distributor extends into the first chamber in a horizontal direction, and wherein a centerline of the first distribution hole makes a first angle with a vertical centerline of the cross-section of the distributor, the first angle being 0 ° to 60 °.

5. The heat exchanger of claim 4, wherein a second angle is formed between a center line of the second distribution hole and the vertical center line, and the second angle is 0-90 °.

6. The heat exchanger according to claim 1, wherein the distributor is located on an upper side of the first chamber in a cross section perpendicular to an axis of the first chamber.

7. The heat exchanger according to claim 6, wherein the first chamber is tubular, the distributor extending into the first chamber in a horizontal direction, the horizontal axis of the distributor being higher than the horizontal axis of the first chamber.

8. The heat exchanger according to any one of claims 1 to 7, wherein the first distribution holes are plural in number, and at least two of the first distribution holes are located on the same cross section of the distributor.

9. The heat exchanger according to any one of claims 1 to 7, wherein the second distribution holes are plural in number, and at least two of the second distribution holes are located on the same cross section of the first chamber.

10. The heat exchanger according to any one of claims 1 to 7, wherein a plurality of the second distribution holes are provided at regular intervals in an extending direction of the distributor.

11. The heat exchanger according to any one of claims 1 to 7, wherein each heat exchange tube is located on the same cross section of the first chamber as at least one of the second distribution holes.

12. The heat exchanger of any one of claims 1 to 7, further comprising:

a mixed flow cavity which is arranged at one side of the collecting pipe, at least one heat exchange pipe is communicated with the mixed flow cavity,

wherein, the medium flows into the mixed flow chamber from the heat exchange tube.

13. The heat exchanger of any one of claims 1 to 7, wherein the first and second chambers are integrally formed.

14. An air conditioner, comprising:

a housing;

a heat exchanger as claimed in any one of claims 1 to 13 provided within the housing.