CN213480401U

CN213480401U - Heat exchanger and air conditioner

Info

Publication number: CN213480401U
Application number: CN202022231900.0U
Authority: CN
Inventors: 康宁; 吴迎文; 李兆宇; 杨瑞琦; 王凯; 马腾飞
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: 2021-06-18
Anticipated expiration: 2030-10-09

Abstract

The utility model relates to the technical field of air conditioners in general, in particular to a heat exchanger and an air conditioner, the heat exchanger comprises a collecting pipe and a clapboard for dividing the pipe cavity of the collecting pipe into cavities, the collecting pipe is provided with a plurality of flat pipes corresponding to each cavity respectively, the collecting pipe is vertically arranged, the length of each cavity and the number of the corresponding flat pipes are gradually increased from top to bottom, the clapboard is provided with a circulation structure for communicating two adjacent cavities, in the scheme, the circulation structure enables deposited liquid refrigerant to flow into the cavity below through the circulation structure, the liquid refrigerant flows from the top of the cavity below to the bottom of the cavity below, and flows into the flat pipes corresponding to the cavity below from top to bottom in sequence in the flowing process, thereby improving the gas-liquid mixing uniformity of the upper part of the cavity below and the uniformity of the refrigerant flowing into each flat pipe, the heat exchange efficiency of the heat exchanger is enhanced.

Description

Heat exchanger and air conditioner

Technical Field

The application relates to the technical field of air conditioners in general, and particularly relates to a heat exchanger and an air conditioner.

Background

When the microchannel heat exchanger is used as an evaporator, an inlet refrigerant is generally in a gas-liquid two-phase state, a collecting pipe of the traditional microchannel heat exchanger has no flow dividing measure, and a liquid refrigerant entering the collecting pipe is descended and deposited by gravity, so that the refrigerant entering the flat pipe is unevenly distributed, and the heat exchange performance of the heat exchanger is poor.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to solve the technical problem that the performance of a heat exchanger is affected by uneven distribution of a refrigerant, the main purpose of the application is to provide a heat exchanger and an air conditioner.

In order to realize the purpose of the utility model, the following technical scheme is adopted in the application:

a heat exchanger comprises a collecting pipe and a partition plate for dividing a pipe cavity of the collecting pipe into cavities, wherein the collecting pipe is provided with a plurality of flat pipes corresponding to each cavity respectively;

the collecting pipe is vertically arranged, the length of each cavity and the number of the corresponding flat pipes are gradually increased from top to bottom, and the partition plate is provided with a circulation structure for communicating the two adjacent cavities, so that deposited liquid refrigerant flows into the cavity below through the circulation structure.

Further, in some embodiments of the present disclosure, each of the cavities is connected to an injection pipe, the injection pipe has a first pipe section extending into the collecting pipe and a second pipe section located outside the collecting pipe, and the periphery of the first pipe section is provided with injection holes;

the injection pipe is provided with a positioning part between the first pipe section and the second pipe section, and the positioning part is used for limiting the length of the injection pipe extending into the collecting pipe.

Further, in some embodiments of the present disclosure, the positioning portion includes a boss disposed on a peripheral side of the injection pipe, and an orientation of the boss is the same as an orientation of the injection hole.

Further, in some embodiments of the present disclosure, the boss extends in a ring shape along a circumferential direction of the injection pipe.

Further, in some embodiments of the present disclosure, the second pipe section is provided with a direction member, and the direction member and the injection hole are oriented in the same direction.

Further, in some embodiments of the present disclosure, the second pipe section is provided with a bending structure, and a bending direction of the bending structure is the same as the direction of the injection hole.

Further, in some embodiments of the present disclosure, the collecting pipe is provided with a plurality of partition plates to divide the pipe cavity of the collecting pipe into a plurality of cavities arranged along the length direction of the collecting pipe.

Further, in some embodiments of the present disclosure, the flow-through structure includes a flow-through hole opened in the partition plate, and the flow-through hole is located on a side of the partition plate away from the flat pipe.

Further, in some embodiments of the present disclosure, the heat exchanger further includes a flow divider, and the flow divider is respectively communicated with each of the cavities through a pipeline.

An air conditioner is provided with the heat exchanger.

According to the technical scheme, the heat exchanger and the air conditioner have the advantages and positive effects that:

the uniformity of the refrigerant flowing into each flat tube is improved, and the heat exchange efficiency of the heat exchanger is improved.

The heat exchanger comprises collecting pipes and partition plates for dividing the pipe cavities of the collecting pipes into cavities, wherein the collecting pipes correspond to each cavity and are respectively provided with a plurality of flat pipes, the collecting pipes are vertically arranged and gradually increase in length of the cavities and the number of the corresponding flat pipes from top to bottom, and the partition plates are provided with circulation structures for communicating the cavities, so that deposited liquid refrigerants flow into the pipe cavity sections below through the circulation structures.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic diagram of a heat exchanger according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating a structure in which an injection pipe of a heat exchanger is in a straight pipe state according to an exemplary embodiment.

FIG. 3 is another schematic diagram of a heat exchanger with the injection tube in a straight tube configuration according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating an assembly structure of a straight pipe state of an injection pipe and a collecting pipe of a heat exchanger according to an exemplary embodiment.

FIG. 5 is a schematic diagram illustrating a heat exchanger with an injector tube in a bent tube configuration, according to an exemplary embodiment.

FIG. 6 is a cross-sectional view of a heat exchanger shown in FIG. 4 according to an exemplary embodiment.

Fig. 7 is a schematic diagram illustrating an assembly structure of a bent pipe state and a header of a spray pipe of a heat exchanger according to an exemplary embodiment.

Wherein the reference numerals are as follows:

100-collecting pipe; 200-flat tube; 300-an injection pipe; 400-a flow divider; 500-a gas collecting pipe;

110-a cavity; 120-a separator;

310-a positioning section; 320-an injection hole; 330-a directional member; 340-bending structure; 350-end cap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The scheme provides a heat exchanger and an air conditioner, the heat exchanger is installed in the air conditioner, the heat exchanger comprises a collecting pipe 100 and a partition plate 120 for dividing the pipe cavity of the collecting pipe 100 into cavities 110, the collecting pipe 100 is respectively provided with a plurality of flat pipes 200 corresponding to each cavity 110, the collecting pipe 100 is vertically arranged, the length of each cavity 110 and the number of the corresponding flat pipes 200 are gradually increased from top to bottom, the partition plate 120 is provided with a circulation structure for communicating two adjacent cavities 110, after gas-liquid two-phase refrigerants enter the cavities 110, the liquid refrigerants are deposited downwards under the action of gravity, the deposited liquid refrigerants are easy to cause uneven flow entering each flat pipe 200 from the cavities, in the scheme, the partition plate 120 of two adjacent cavities 110 is provided with the circulation structure, so that the deposited liquid refrigerants flow into the cavities below through the circulation structure, the liquid refrigerants flow into the cavities from the tops of, from last to flowing through the flat pipe 200 that the below cavity corresponds down in proper order, improved the internal gas-liquid mixture homogeneity of below cavity, improve the homogeneity that the refrigerant flowed into each flat pipe 200, strengthened the heat exchange efficiency of heat exchanger.

Referring to fig. 1 to 7, the heat exchanger includes a collecting pipe 100, a gas collecting pipe 500, a flat pipe 200, an injection pipe 300 and a diverter 500, the flat pipe 200 includes a first end and a second end, the first end of the flat pipe 200 is connected to the collecting pipe 100, the second end of the flat pipe 200 is connected to the gas collecting pipe 500, the collecting pipe 100 is connected to the injection pipe 300, and the injection pipe 300 is connected to the diverter 400.

Referring to fig. 1, 4 and 7, the collecting main 100 is provided with a plurality of flat pipe grooves for communicating with the flat pipes 200, the flat pipe grooves are arranged at intervals along the length direction of the collecting main 100, a partition plate 120 groove is arranged on one side of the collecting main 100 opposite to the flat pipe grooves, a partition plate 120 is arranged in the partition plate 120 groove, and the pipe cavity of the collecting main 100 is divided into a plurality of cavities 110 by the partition plate 120. In this scheme, baffle 120 can be provided with one, two or more, and a plurality of baffles 120 arrange along the length direction of pressure manifold 100 and set up, and when baffle 120 was provided with one, the lumen of pressure manifold 100 was separated for two cavitys 110, and when baffle 120 was provided with two, the lumen of pressure manifold 100 was cut apart into three cavity 110, so on, when baffle 120 was provided with N, the lumen of pressure manifold 100 was cut apart into N +1 cavity 110.

When the heat exchanger is in use, the collecting pipe 100 is vertically arranged, the cavities 110 are gradually lengthened from top to bottom, the number of flat pipe grooves corresponding to each cavity 110 is gradually increased, namely the number of flat pipes 200 connected with each cavity 110 is increased, the partition plate 120 is provided with a circulation structure, the circulation structure is used for communicating two adjacent cavities 110, according to the phenomenon that liquid refrigerants are deposited downwards under gravity, the collecting pipe 100 comprises two cavities 110 as an example, and is respectively defined as an upper cavity and a lower cavity according to the position relation, the length of the lower cavity is greater than that of the upper cavity, the upper cavity and the lower cavity are respectively connected with a plurality of flat pipes 200, the number of the flat pipes 200 connected with the lower cavity is greater than that of the flat pipes 200 connected with the upper cavity, when gas-liquid two-phase refrigerants enter the upper cavity and the lower cavity respectively through the flow divider 400, the liquid refrigerants deposited in the upper cavity flow into the lower cavity through the circulation structure, and uneven flow of each flat pipe 200 caused by, the liquid refrigerant deposited by the upper cavity flows into the lower cavity from the top of the lower cavity through the circulation structure, and the liquid refrigerant is mixed with the gaseous refrigerant on the upper part of the lower cavity in the process of flowing to the bottom of the lower cavity, so that the gas-liquid mixing uniformity of the refrigerant in the lower cavity is improved.

The lower cavity has the phenomenon that liquid refrigerant is easy to deposit, the refrigerant flow of the flat tubes 200 at the upper part of the lower cavity is relatively smaller than that of the flat tubes 200 at the lower part of the lower cavity, and the liquid refrigerant deposited on the upper cavity flows from top to bottom in the lower cavity, so that the gas-liquid mixing uniformity of the refrigerant in the lower cavity is improved, and the refrigerant flow uniformity of the flat tubes 200 communicated with the lower cavity is improved. In this scheme, circulation structure is including seting up the opening of baffle 120, and the opening is located one side that flat pipe 200 was kept away from to baffle 120, and when sedimentary liquid refrigerant flowed down the cavity from the opening, the flow path of avoiding liquid refrigerant cavity under was close to flat pipe 200, prevents that liquid refrigerant from concentrating to flow to in the flat pipe 200 that is close to baffle 120 in the cavity down, has guaranteed the homogeneity of the refrigerant flow of each flat pipe 200 of cavity down. Those skilled in the art can determine the size of the flow holes according to the size of the header 100 and the size of the partition 120 in practice, and a plurality of flow holes may be provided.

In this embodiment, when the collecting main 100 includes a plurality of cavities 110, two cavities 110 may be regarded as a group of cavities, and the two cavities in the group of cavities have the same length and the same number of the corresponding flat tubes 200, that is, the collecting main 100 increases the length of the cavity and the number of the corresponding flat tubes 200 once every two cavities 110 from top to bottom, and under the understanding of those skilled in the art, the length of each cavity 110 and the number of the corresponding flat tubes 200 may be set according to the total length of the collecting main 100 and the number of the flat tubes 200. Each pipe cavity of the collecting main 100 is connected with an injection pipe 300, as shown in fig. 1, the injection pipe 300 is disposed near the bottom of the cavity 110, and the refrigerant is ejected from bottom to top in the cavity 110.

The injection pipe 300 comprises a first pipe section and a second pipe section, after the injection pipe 300 is assembled with the header 100, the first pipe section of the injection pipe 300 is located inside the header 100, the second pipe section is located outside the header 100, a positioning portion 310 is arranged between the first pipe section and the second pipe section, and the positioning portion 310 is used for limiting the length of the injection pipe 300 extending into the header 100. As shown in fig. 2, the injection pipe 300 has a straight pipe structure, the positioning portion 310 includes a boss disposed on the circumferential side of the injection pipe 300, the boss has the same orientation as the injection hole 320, and when the injection pipe 300 is mounted, the orientation of the injection hole 320 is easily positioned. As shown in fig. 3, the positioning portion 310 may be an annular boss structure, that is, the boss extends along the circumferential direction of the injection pipe 300 to be annular, the second pipe section is provided with a direction piece 330, the direction piece 330 and the injection holes 320 have the same orientation, and when the injection pipe 300 is installed, the orientation of the injection holes 320 is conveniently positioned, in this embodiment, the direction piece 330 is a protruding block arranged on the injection pipe 300, and the protruding block may be in the form of a rectangular parallelepiped, a wedge, or a quadrangular prism. Fig. 4 is a partial configuration view of the header 100 with the injection pipe 300 attached, in which the positioning portion 310 is provided upward and the injection hole 320 is provided upward. In this embodiment, the end of the first section of the injection pipe 300 is connected with an end cap 350, and the end cap 350 is screwed with the injection pipe 300, so as to seal the end hole of the first section. As will be understood by those skilled in the art, according to the design requirement of the heat exchanger, the end cap 350 may also be provided with holes for spraying the refrigerant, and the holes may be circular, triangular or other irregular shapes capable of realizing the circulation of the refrigerant.

In the present embodiment, as shown in fig. 5-7, the direction member 330 of the injection pipe 300 may be replaced by a bending structure 340, that is, the second pipe section is provided with the bending structure 340, and the bending direction of the bending structure 340 is the same as the direction of the injection hole 320. When the injection pipe 300 is installed, the orientation and angle of the injection hole 320 are ensured, and the refrigerant distribution uniformity of the collecting main 100 is improved. In this embodiment, the bending angle of the bending structure 340 is positive, and negative, and the bending angle is defined as α ≦ 90 °.

In this application scheme, the heat exchanger is connected with the flow divider 400, and the flow divider 400 communicates with each pressure manifold 100 through the pipeline, makes even distribution of refrigerant to in each cavity 110.

The embodiment also provides an air conditioner, and the air conditioner is provided with the heat exchanger.

In summary, the present disclosure provides a heat exchanger and an air conditioner, the heat exchanger includes a header pipe 100 and a partition plate 120 for dividing a tube cavity of the header pipe 100 into cavities 110, the header pipe 100 is provided with a plurality of flat tubes 200 corresponding to each cavity 110, the header pipe 100 is vertically disposed, the length of each cavity 110 and the number of the corresponding flat tubes 200 are gradually increased from top to bottom, the partition plate 120 is provided with a flow structure for communicating two adjacent cavities 110, after a gas-liquid two-phase refrigerant enters the cavities 110, the liquid refrigerant is deposited downward under the action of gravity, the deposited liquid refrigerant is likely to cause uneven flow entering each flat tube 200 from the cavities 110, in the present disclosure, the partition plate 120 of two adjacent cavities 110 is provided with a flow structure, so that the deposited liquid refrigerant flows into the cavities below the partition plate through the flow structure, the liquid refrigerant flows into the cavities from the top of the cavities below and is mixed with the gas at the upper portions, the upper gas-liquid mixing uniformity of the cavity below is improved, the uniformity of the refrigerant flowing into each flat tube 200 is improved, the heat exchanger is connected with the flow divider 400, the flow divider 400 is communicated with each collecting pipe 100 through a pipeline, the refrigerant is uniformly distributed to each cavity 110, the refrigerant flow dividing uniformity is realized, and the heat exchange efficiency of the heat exchanger can be greatly improved.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The heat exchanger is characterized by comprising a collecting pipe (100) and a partition plate (120) for dividing a pipe cavity of the collecting pipe (100) into cavities (110), wherein the collecting pipe (100) is provided with a plurality of flat pipes (200) corresponding to each cavity (110);

the collecting pipe (100) is vertically arranged, the length of each cavity (110) and the number of the corresponding flat pipes (200) are gradually increased from top to bottom, and the partition plate (120) is provided with a circulation structure for communicating the two adjacent cavities (110) so that deposited liquid refrigerant flows into the cavity below through the circulation structure.

2. The heat exchanger according to claim 1, wherein each cavity (110) is connected with a spray pipe (300), the spray pipe (300) has a first pipe section extending into the collecting pipe (100) and a second pipe section located outside the collecting pipe (100), and the periphery of the first pipe section is provided with spray holes (320);

the injection pipe (300) is provided with a positioning part (310) between the first pipe section and the second pipe section, and the positioning part (310) is used for limiting the length of the injection pipe (300) extending into the collecting pipe (100).

3. The heat exchanger according to claim 2, wherein the positioning portion (310) includes a boss provided on a circumferential side of the injection pipe (300), the boss having an orientation identical to that of the injection hole (320).

4. The heat exchanger according to claim 3, wherein the boss extends in a ring shape along a circumferential direction of the injection pipe (300).

5. A heat exchanger according to claim 3, wherein the second tube section is provided with a directional member (330), the directional member (330) being oriented in the same direction as the injection holes (320).

6. The heat exchanger according to claim 3, characterized in that the second tube section is provided with a bending structure (340), and the bending direction of the bending structure (340) is the same as the orientation of the injection holes (320).

7. The heat exchanger according to claim 1, wherein the header (100) is provided with a plurality of partitions (120) to divide the tube cavity of the header (100) into a plurality of the cavities (110) arranged along the length of the header (100).

8. The heat exchanger according to claim 1, characterized in that the flow-through structure comprises a flow-through opening which opens into the partition (120) on the side of the partition (120) remote from the flat tube (200).

9. The heat exchanger according to claim 1, further comprising a flow divider (400), the flow divider (400) being in communication with each of the chambers (110) via a conduit, respectively.

10. An air conditioner characterized in that the heat exchanger according to any one of claims 1 to 9 is installed.