CN220471756U - Heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of heat exchangers, and discloses a heat exchanger, and the heat exchanger comprises: the heat exchanger comprises a first header, a second header, a first heat exchange part and a second heat exchange part. One end of the first heat exchange part is communicated with the first header pipe, and the other end of the first heat exchange part is communicated with the second header pipe; one end of the second heat exchange part is communicated with the first header pipe, and the other end of the second heat exchange part is communicated with the second header pipe; the number of the heat exchange tube groups in the first heat exchange part is larger than that of the heat exchange tube groups in the second heat exchange part, a first one-way valve is communicated in the first header, the input end of the first one-way valve is communicated with the second heat exchange part, and the output end of the first one-way valve is communicated with the first heat exchange part. In the application, the structure of flow path switching during refrigeration or heating can be simplified, and the production cost of the heat exchanger can be reduced. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner

Technical Field

The application relates to the technical field of heat exchangers, in particular to a heat exchanger and an air conditioner.

Background

The heat exchanger is an indispensable part in the air conditioner, and the performance of the heat exchanger directly influences the overall performance of the air conditioner. The heat exchanger is developed in a direction of developing a compact heat exchanger from the viewpoints of saving cost, improving energy efficiency and protecting environment. One main method for making the heat exchanger more compact at the present stage is to replace a copper pipe with a larger diameter in the existing heat exchanger by adopting a heat exchanger with a copper pipe with a smaller pipe diameter. After the heat exchanger adopts the heat exchange tube with smaller tube diameter, although the heat exchange performance of the heat exchanger can be improved by increasing the heat exchange coefficient of the refrigerant side, the direct influence on the heat exchanger is that the heat exchange area in the tube is reduced, and meanwhile, the heat exchange coefficient of the refrigerant side in the tube is increased and the on-way resistance loss is increased, and the heat exchange performance of the heat exchanger and the energy efficiency of a system are reduced due to the reduction of the heat exchange area and the on-way resistance loss of the refrigerant.

There is a heat exchanger in the related art, and four pairs of flow passage interfaces are arranged on the heat exchanger: the first runner interface, the second runner interface, the third runner interface, the fourth runner interface, the sixth runner interface and the eighth runner interface, and the fifth runner interface and the seventh runner interface in the middle of the heat exchanger; the flow path distribution is realized through a one-way valve and a split-flow joint which are arranged in an external distribution pipeline, and the split-flow joint adopts a Y-shaped joint or a flow path distributor so as to simplify pipeline connection. In order to improve the supercooling degree of the refrigerant, reduce the dryness after the refrigerant throttles, reduce the cold loss, still be provided with the supercooling section in the inside heat exchange pipeline of heat exchanger, the supercooling section is as the confluence section before the refrigerant flows out the heat exchanger simultaneously, and the supercooling section concatenates on the outside distributing pipe way before the total export through the ninth that sets up, tenth runner joint.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the structure of flow path switching is complex when refrigeration or heating is realized, so that the structure of the heat exchanger is complex, and the production cost is increased.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a heat exchanger and an air conditioner, which are used for simplifying a flow path switching structure during refrigeration or heating, reducing the production cost of the heat exchanger and further reducing the cost of the air conditioner.

In some embodiments, a heat exchanger includes: the heat exchanger comprises a first header, a second header, a first heat exchange part and a second heat exchange part. One end of the first heat exchange part is communicated with the first header pipe, and the other end of the first heat exchange part is communicated with the second header pipe; one end of the second heat exchange part is communicated with the first header pipe, and the other end of the second heat exchange part is communicated with the second header pipe; the number of the heat exchange tube groups in the first heat exchange part is larger than that of the heat exchange tube groups in the second heat exchange part, a first one-way valve is communicated in the first header, the input end of the first one-way valve is communicated with the second heat exchange part, and the output end of the first one-way valve is communicated with the first heat exchange part.

Optionally, the first heat exchange portion and the second heat exchange portion are disposed in the same plane, the first header is located at one side of the plane where the first heat exchange portion and the second heat exchange portion are located, and the second header is located at the other side of the plane where the first heat exchange portion and the second heat exchange portion are located.

Optionally, the heat exchange tubes of the heat exchange tube groups in the first heat exchange portion and the second heat exchange portion each have an outer diameter greater than or equal to 2.5mm and less than or equal to 10mm.

Optionally, the heat exchange tubes of the heat exchange tube groups in the first heat exchange portion and the second heat exchange portion are made of copper or aluminum materials.

Optionally, the first heat exchange portion includes four heat exchange tube groups, the second heat exchange portion includes two heat exchange tube groups, one end of each heat exchange tube group is communicated with the first header, and the other end is communicated with the second header.

Optionally, the heat exchanger further comprises: and a third heat exchange part. One end of the third heat exchange part is communicated with the first header pipe, and the other end of the third heat exchange part is communicated with the second header pipe; the second header is internally communicated with a second one-way valve, the input end of the second one-way valve is communicated with the third heat exchange part, the output end of the second one-way valve is communicated with the first heat exchange part and the second heat exchange part, and the position of the third heat exchange part communicated with the first header is positioned at the input end side of the first one-way valve.

Optionally, when the heat exchanger is used as a condenser, the refrigerant flows into the first heat exchange part from the first header, then flows into the second heat exchange part from the first heat exchange part, finally flows into the third heat exchange part from the second heat exchange part and then flows out; when the heat exchanger is used as an evaporator, the refrigerant flows in from the second header, is split into the first heat exchange portion, the second heat exchange portion and the third heat exchange portion at the same time, and then flows in a concentrated manner to the first header to flow out.

Optionally, the heat exchanger further comprises: composite fins. The composite fins are sleeved on the outer sides of the heat exchange tube groups in the first heat exchange part and the second heat exchange part.

Optionally, the composite fin is divided into a windward fin and a leeward fin, the side surface of the windward fin is of a smooth surface structure, and the side surface of the leeward fin is provided with a window or a protruding part.

In some embodiments, an air conditioner includes: the heat exchanger of the above embodiment.

The heat exchanger and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

the first heat exchange part and the second heat exchange part are respectively communicated by arranging the first header pipe and the second header pipe, the first check valve is communicated in the first header pipe, and the communication position of the first check valve is arranged between the first heat exchange part and the second heat exchange part, so that the paths through which the refrigerant flows in from the first header pipe and flows in from the second header pipe are different. When the heat exchanger is used as a condenser for heating, the refrigerant flows into the first heat exchange part from the first header, the refrigerant in the first heat exchange part flows into the second header under the action of the first one-way valve, and part of the refrigerant in the second header flows into the second heat exchange part and flows out after flowing into the first header again, so that the flow of the refrigerant is increased, and the condensing and heating effects are improved. When the heat exchanger is used as an evaporator for refrigerating, the refrigerant flows in from the second header, then is split into the first heat exchange part and the second heat exchange part at the same time, and then flows out after being converged and flowed into the first header from the first heat exchange part and the second heat exchange part, so that a plurality of paths of parallel flow paths are formed, the number of split flow paths is increased, the pressure drop and the on-way resistance loss of the refrigerant are reduced, and the evaporation refrigerating effect is improved. The first check valve is communicated with the first header pipe, so that flow path switching during refrigeration or heating can be realized, the structure of flow path switching during refrigeration or heating is simplified, the production cost of the heat exchanger is reduced, and the cost of the air conditioner is further reduced.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic view of a heat exchanger provided in an embodiment of the present disclosure;

FIG. 2 is a schematic flow path diagram of the heat exchanger as a condenser heating provided by embodiments of the present disclosure;

FIG. 3 is a schematic flow path diagram of the heat exchanger as an evaporator refrigeration provided by an embodiment of the present disclosure;

FIG. 4 is a schematic illustration of a composite fin structure provided in an embodiment of the present disclosure;

FIG. 5 is a schematic view of another composite fin provided in an embodiment of the present disclosure;

FIG. 6 is a schematic view of another composite fin provided in an embodiment of the present disclosure;

FIG. 7 is a schematic view of another composite fin provided in an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of another composite fin provided by an embodiment of the present disclosure.

Reference numerals:

100. a first header; 110. a first one-way valve; 200. a second header; 210. a second one-way valve; 300. a first heat exchange part; 310. a heat exchange tube group; 400. a second heat exchange part; 500. a third heat exchange section; 600. a composite fin; 610. windward wing; 620. lee wing; 621. windowing; 622. a boss.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged where appropriate in order to describe the presently disclosed embodiments. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the azimuth or positional relationship shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," and "fixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

As shown in connection with fig. 1-3, in some embodiments, a heat exchanger includes: the first header 100, the second header 200, the first heat exchanging part 300, and the second heat exchanging part 400. One end of the first heat exchanging part 300 communicates with the first header 100, and the other end communicates with the second header 200; one end of the second heat exchanging part 400 communicates with the first header 100, and the other end communicates with the second header 200; wherein the number of heat exchange tube groups 310 in the first heat exchange portion 300 is greater than the number of heat exchange tube groups 310 in the second heat exchange portion 400, the first header 100 is communicated with the first check valve 110, the input end of the first check valve 110 is communicated with the second heat exchange portion 400, and the output end is communicated with the first heat exchange portion 300.

With the heat exchanger provided in the embodiment of the present disclosure, the first heat exchanging portion 300 and the second heat exchanging portion 400 are respectively communicated by providing the first header 100 and the second header 200, the first check valve 110 is communicated in the first header 100, and the communication position of the first check valve 110 is provided between the first heat exchanging portion 300 and the second heat exchanging portion 400, so that paths through which the refrigerant flows when flowing in from the first header 100 and when flowing in from the second header 200 are different. When the heat exchanger is used as a condenser for heating, the refrigerant flows into the first heat exchange part 300 from the first header 100, the refrigerant in the first heat exchange part 300 flows into the second header 200 under the action of the first one-way valve 110, and the refrigerant in the second header 200 partially flows into the second heat exchange part 400 and then flows into the first header 100 again and flows out, so that the flow of the refrigerant is increased, and the condensing and heating effects are improved. When the heat exchanger is used as an evaporator for refrigerating, the refrigerant flows in from the second header 200, then is split into the first heat exchange part 300 and the second heat exchange part 400 at the same time, and then flows out after being gathered and flowing into the first header 100 from the first heat exchange part 300 and the second heat exchange part 400, so that a plurality of parallel flow paths are formed, the number of the split flow paths is increased, the pressure drop and the on-way resistance loss of the refrigerant are reduced, and the evaporation refrigerating effect is improved. The first check valve 110 is communicated with the first header 100 to realize flow path switching during cooling or heating, so that the flow path switching structure during cooling or heating is simplified, and the production cost of the heat exchanger is reduced.

Alternatively, the first heat exchanging part 300 and the second heat exchanging part 400 are disposed in the same plane, the first header 100 is located at one side of the plane where the first heat exchanging part 300 and the second heat exchanging part 400 are located, and the second header 200 is located at the other side of the plane where the first heat exchanging part 300 and the second heat exchanging part 400 are located. In this way, the first heat exchange part 300 and the second heat exchange part 400 are arranged in the same plane, so that the structure of the heat exchanger is more reasonable, and the heat exchange air flow can uniformly flow through the first heat exchange part 300 and the second heat exchange part 400 to exchange heat. The first header 100 and the second header 200 are respectively arranged at two sides of a plane formed by the first heat exchanging part 300 and the second heat exchanging part 400, and two ends of the first heat exchanging part 300 and the second heat exchanging part 400 can be more smoothly communicated with the first header 100 and the second header 200, so that the heat exchanger has more compact structure and space occupation of the heat exchanger is reduced.

Alternatively, the first heat exchange portion 300 includes four heat exchange tube groups 310, and the second heat exchange portion 400 includes two heat exchange tube groups 310, each heat exchange tube group 310 having one end in communication with the first header 100 and the other end in communication with the second header 200. In this way, when the heat exchanger is used as a condenser for heating, the refrigerant is split from the first header 100 into the four heat exchange tube groups 310 of the first heat exchange portion 300, and then flows into the second header 200 in a converging manner, and the refrigerant in the second header 200 is split into the two heat exchange tube groups 310 of the second heat exchange portion 400 and flows out, thereby forming four-way inlet and two-way outlet flow paths, and improving the effect of condensing and heating. When the heat exchanger is used as an evaporator for refrigerating, the refrigerant flows in from the second header 200, is split into four groups of heat exchange tube groups 310 of the first heat exchange part 300 and two groups of heat exchange tube groups 310 of the second heat exchange part 400, then flows out after being converged to the first header 100, and forms six parallel flow paths, so that the pressure drop of the refrigerant is reduced, and the evaporation refrigerating effect is improved.

Specifically, each of the heat exchange tube groups 310 in the first heat exchange portion 300 and the second heat exchange portion 400 has two ports, and one of the ports of each heat exchange tube group 310 communicates with the first header 100 and the other communicates with the second header 200.

Illustratively, the six heat exchange tube groups 310 in the first heat exchange portion 300 and the second heat exchange portion 400 are in the same plane, and in the example of the heat exchanger being vertically placed, the six heat exchange tube groups 310 in the first heat exchange portion 300 and the second heat exchange portion 400 are arranged in the vertical direction in the same vertical plane.

Optionally, eight heat exchange tubes are provided in each heat exchange tube group 310. Thus, by arranging eight heat exchange tubes to circulate the refrigerant, the heat exchange area of the heat exchange tube group 310 can be ensured, and the occupied space of the heat exchange tube group 310 can be reasonable.

Specifically, the four heat exchange tubes are respectively a first tube, a second tube, a third tube, a fourth tube, a fifth tube, a sixth tube, a seventh tube and an eighth tube, one end of the first tube is communicated with the first header 100, the other end is communicated with one end of the second tube, the other end of the second tube is communicated with one end of the third tube, the other end of the third tube is communicated with one end of the fourth tube, the other end of the fourth tube is communicated with one end of the fifth tube, the other end of the fifth tube is communicated with one end of the sixth tube, the other end of the sixth tube is communicated with one end of the seventh tube, the other end of the seventh tube is communicated with one end of the eighth tube, and the other end of the eighth tube is communicated with the second header 200. Thus, a complete flow path is formed by the first, second, third, fourth, fifth, sixth, seventh and eighth tubes in sequence, with both ends of the flow path communicating with the first and second headers 100 and 200, respectively. When the refrigerant flows into the first header 100, the refrigerant flows into one end of the first tube, flows through the second tube, the third tube, the fourth tube, the fifth tube, the sixth tube, the seventh tube, and the eighth tube in this order, and flows into the second header 200 from the other end of the eighth tube.

It will be understood that each heat exchange tube group 310 has the same structure and communication with the first header 100 and the second header 200 in the same manner, and will not be described in detail herein.

Alternatively, the heat exchange tube outer diameters of the heat exchange tube groups 310 in the first heat exchange portion 300 and the second heat exchange portion 400 are each greater than or equal to 2.5mm and less than or equal to 10mm. Like this, set up the heat exchange tube in first heat exchange portion 300 and the second heat exchange portion 400 as the external diameter and be greater than or equal to 2.5mm, and be less than or equal to 10 mm's heat exchange tube, replaced the great copper pipe of diameter in the current heat exchanger, can further reduce the material consumption of tubular product, reduce cost. And the refrigerant filling amount can be reduced, the danger of adopting the combustible refrigerant is directly reduced by reducing the refrigerant filling amount, and the energy conservation and the environmental protection are realized.

Specifically, the heat exchange tube outer diameter of the heat exchange tube group 310 in the first heat exchange portion 300 and the second heat exchange portion 400 is equal to 5mm. Therefore, the consumption of the pipe in the production of the heat exchanger can be reduced, the filling amount of the refrigerant is reduced, and the production cost of the heat exchanger is reduced while the heat exchange effect is ensured.

Alternatively, the heat exchange tubes of the heat exchange tube group 310 in the first heat exchange portion 300 and the second heat exchange portion 400 are made of copper or aluminum materials. Therefore, the heat exchange tube made of copper or aluminum has better heat exchange performance and stronger oxidation resistance, and the service life of the heat exchanger is prolonged while the heat exchange performance of the heat exchanger is improved.

Specifically, the heat exchange tubes of the heat exchange tube group 310 in the first heat exchange portion 300 and the second heat exchange portion 400 are each made of copper material. Therefore, the heat exchange tube made of the copper material has good heat exchange performance and oxidation resistance and relatively high strength, so that the heat exchanger is not easy to deform and damage in the transportation and use processes.

Optionally, the heat exchanger further comprises: and a third heat exchanging part 500. One end of the third heat exchanging part 500 communicates with the first header 100, and the other end communicates with the second header 200; wherein the second header 200 is communicated with the second check valve 210, the input end of the second check valve 210 is communicated with the third heat exchange portion 500, the output end of the second check valve 210 is communicated with the first heat exchange portion 300 and the second heat exchange portion 400, and the position where the third heat exchange portion 500 is communicated with the first header 100 is located at the input end side of the first check valve 110. In this way, by providing the third heat exchange portion 500 to further increase the flow path, and providing the second check valve 210 in the second header 200, the refrigerant can flow through the first heat exchange portion 300, the second heat exchange portion 400, and the third heat exchange portion 500 in this order when the heat exchanger heats as a condenser, thereby increasing the flow path of the refrigerant and further improving the condensing/heating capacity. When the heat exchanger is used as an evaporator for refrigeration, the refrigerant can be simultaneously split into the first heat exchange part 300, the second heat exchange part 400 and the third heat exchange part 500 to form a plurality of paths of parallel flow paths, so that the number of the flow paths is further increased, the pressure drop of the refrigerant is reduced, and the evaporation refrigeration capacity is improved.

Alternatively, when the heat exchanger is used as a condenser, the refrigerant flows from the first header 100 into the first heat exchanging portion 300, then flows from the first heat exchanging portion 300 into the second heat exchanging portion 400, and finally flows from the second heat exchanging portion 400 into the third heat exchanging portion 500 and then flows out; when the heat exchanger is used as an evaporator, the refrigerant flows in from the second header 200, is split into the first heat exchanging portion 300, the second heat exchanging portion 400, and the third heat exchanging portion 500, and then flows out in a concentrated manner to the first header 100. Thus, when the heat exchanger is used as a condenser, the refrigerant flows into the first header 100, the refrigerant in the first header 100 is all split into the first heat exchanging portion 300 by the first check valve 110, and then flows into the second header 200, the refrigerant in the second header 200 is split into the second heat exchanging portion 400 by the second check valve 210 of the second header 200, the refrigerant in the second heat exchanging portion 400 flows into the first header 100 again, the refrigerant flows into the third heat exchanging portion 500 by the first check valve 110, the refrigerant in the third heat exchanging portion 500 flows into the second header 200 again, and then flows out of the second header 200 by the second check valve 210, thereby further increasing the flow of the refrigerant. When the heat exchanger is used as an evaporator, the refrigerant flows in from the second header 200, then is split into the first heat exchange part 300, the second heat exchange part 400 and the third heat exchange part 500 at the same time, and then flows in the first header 100 in a converging way to flow out, so as to form a plurality of paths of parallel flow paths, further increase the number of the flow paths and reduce the pressure drop of the refrigerant.

Specifically, the first header 100 has two ports, the port on the output side of the first check valve 110 communicates with the outside, and the port on the input side of the first check valve 110 communicates with the third heat exchanging portion 500; the second header 200 also has two ports, the port on the input side of the second check valve 210 communicates with the third heat exchange portion 500 and the outside, and the port on the output side of the second check valve 210 communicates with the first heat exchange portion 300 and the second heat exchange portion 400; when the heat exchanger is used as a condenser, the refrigerant flows in from the port of the first header 100 on the output side of the first check valve 110, and flows out from the port of the second header 200 on the input side of the second check valve 210; when the heat exchanger is used as an evaporator, the refrigerant flows in from the port of the second header 200 on the input side of the second check valve 210, and flows out from the port of the first header 100 on the output side of the first check valve 110.

Optionally, the third heat exchange portion 500 includes a set of heat exchange tube groups 310. Thus, when the heat exchanger is used as a condenser, the refrigerant flows in from the first header 100, flows through the first heat exchange part 300, the second heat exchange part 400 and the third heat exchange part 500 in sequence, forms a four-way to two-way to one-way circulation mode, and is continuously collected in the circulation process, so that the condensation heating effect is improved. When the heat exchanger is used as an evaporator, the refrigerant flows in from the second header 200, and is split into the first heat exchange portion 300, the second heat exchange portion 400 and the third heat exchange portion 500, and then flows out into the second header 200, so that seven parallel flow paths are formed, and the pressure drop of the refrigerant is reduced.

It can be understood that the outer diameter of the heat exchange tube in the third heat exchange portion 500 is also set to 5mm, and the material is also made of copper.

As shown in connection with fig. 4-8, in some embodiments, the heat exchanger further comprises: composite fin 600. The complex fin 600 is sleeved outside the heat exchange tube group 310 in the first heat exchange portion 300 and the second heat exchange portion 400. In this way, the heat exchange area of the heat exchanger can be increased by arranging the composite fins 600, and the heat exchange efficiency of the heat exchanger can be improved.

Specifically, the inner sides of the composite fins 600 are provided with tube holes penetrating therethrough, through which the heat exchange tubes of the heat exchange tube group 310 in the first heat exchange portion 300 and the second heat exchange portion 400 are provided. In this way, the heat exchange efficiency of the heat exchanger is improved and the strength thereof is improved by forming the support with each other by the cooperation of the heat exchange tube group 310 and the complex fin 600.

Specifically, the heat exchange tube group 310 of the third heat exchange portion 500 is also provided with the composite fin 600.

Optionally, the outer surfaces of the heat exchange tube groups 310 in the first, second and third heat exchange portions 300, 400 and 500 are each coated with a tin layer. In this way, when the heat exchange tube group 310 in the first heat exchange portion 300, the second heat exchange portion 400 and the third heat exchange portion 500 expands, the tin layer on the outer surface of the heat exchange tube group 310 can form a whole with the side wall of the composite fin 600 corresponding to the tube hole in the high-temperature environment, so that the connection strength of the heat exchange tube group 310 and the composite fin 600 is improved, the contact thermal resistance between the heat exchange tube and the fin is reduced, and the heat exchange performance is improved.

Optionally, the composite fin 600 is divided into a windward fin 610 and a leeward fin 620, where the windward fin 610 has a smooth surface structure on its side, and the leeward fin 620 has a window 621 or a protrusion 622 on its side. Thus, when the heat exchanger is used as an evaporator, frosting occurs on the composite fins 600, and the frost layer affects the heat exchange effect between the air flow and the composite fins 600. And the frost layer is mainly distributed on the windward side of the composite fin 600, and frosting on the leeward side is relatively less. Therefore, the side surface of the windward fin 610 of the composite fin 600 is provided with a smooth surface structure, so that frost layers are not easy to adhere and accumulate, and the side surface of the leeward fin 620 of the composite fin 600 is provided with a structure of a window 621 or a protruding part 622, so that the heat exchange area is increased, and the heat exchange is enhanced. The heat exchange effect of the composite fin 600 is ensured while the risk of frosting of the composite fin 600 is reduced.

Optionally, the sides of the windward fin 610 are corrugated or planar in configuration. In this way, by providing the side surfaces of the windward fin 610 as corrugated surfaces or planar structures, the risk of frosting of the composite fin 600 can be reduced.

Specifically, the sides of the windward wing 610 are corrugated. In this way, the heat exchange area of the windward fin 610 can be increased while reducing the risk of frosting of the composite fin 600.

In one particular embodiment, shown in conjunction with the figures, the sides of the leeward fin 620 are provided with fenestrations 621. In this way, the open windows 621 are provided on the side surfaces of the leeward wings 620, so that the air flow flowing through the leeward wings 620 can flow through the open windows 621, and the direction of the air flow is disturbed, thereby improving the heat exchange efficiency.

In another particular embodiment, shown in connection with the figures, the sides of the leeward fin 620 are provided with protrusions 622. In this way, the side surface of the leeward fin 620 is provided with the protrusion 622, which can increase the heat exchange area of the leeward fin 620 and improve the heat exchange efficiency.

Alternatively, the protrusions 622 are any one of delta wings, longitudinal vortex generators, rectangular wings, or corrugated wings.

In some embodiments, an air conditioner includes: the heat exchanger of the above embodiment.

By adopting the air conditioner provided by the embodiment of the disclosure, the first check valve 110 is communicated with the first header 100, so that the flow path switching during refrigeration or heating can be realized, the structure of flow path switching during refrigeration or heating is simplified, the production cost of the heat exchanger is reduced, and the cost of the air conditioner is further reduced.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A heat exchanger, comprising:

a first header (100);

a second header (200);

a first heat exchange unit (300) having one end connected to the first header (100) and the other end connected to the second header (200);

a second heat exchange unit (400) having one end connected to the first header (100) and the other end connected to the second header (200);

wherein the number of the heat exchange tube groups (310) in the first heat exchange part (300) is larger than the number of the heat exchange tube groups (310) in the second heat exchange part (400), a first one-way valve (110) is communicated in the first header (100), the input end of the first one-way valve (110) is communicated with the second heat exchange part (400), and the output end of the first one-way valve is communicated with the first heat exchange part (300).

2. A heat exchanger according to claim 1 wherein,

the first heat exchange part (300) and the second heat exchange part (400) are arranged in the same plane, the first header (100) is positioned on one side of the plane where the first heat exchange part (300) and the second heat exchange part (400) are positioned, and the second header (200) is positioned on the other side of the plane where the first heat exchange part (300) and the second heat exchange part (400) are positioned.

3. A heat exchanger according to claim 1 wherein,

the heat exchange tube outer diameters of the heat exchange tube groups (310) in the first heat exchange part (300) and the second heat exchange part (400) are both larger than or equal to 2.5mm and smaller than or equal to 10mm.

4. A heat exchanger according to claim 1 wherein,

the heat exchange tubes of the heat exchange tube group (310) in the first heat exchange portion (300) and the second heat exchange portion (400) are made of copper or aluminum materials.

5. A heat exchanger according to claim 1 wherein,

the first heat exchange portion (300) includes four heat exchange tube groups (310), and the second heat exchange portion (400) includes two heat exchange tube groups (310), and one end of each heat exchange tube group (310) communicates with the first header (100) and the other end communicates with the second header (200).

6. The heat exchanger of any one of claims 1 to 5, further comprising:

a third heat exchange unit (500) having one end connected to the first header (100) and the other end connected to the second header (200);

wherein, the second header (200) is communicated with a second one-way valve (210), the input end of the second one-way valve (210) is communicated with a third heat exchange part (500), the output end of the second one-way valve (210) is communicated with the first heat exchange part (300) and the second heat exchange part (400), and the position of the third heat exchange part (500) communicated with the first header (100) is positioned at the input end side of the first one-way valve (110).

7. The heat exchanger of claim 6, wherein the heat exchanger is configured to heat the heat exchanger,

when the heat exchanger is used as a condenser, the refrigerant flows into the first heat exchange part (300) from the first header (100), flows into the second heat exchange part (400) from the first heat exchange part (300), and finally flows into the third heat exchange part (500) from the second heat exchange part (400) and flows out; when the heat exchanger is used as an evaporator, the refrigerant flows in from the second header (200), is split into the first heat exchange portion (300), the second heat exchange portion (400) and the third heat exchange portion (500) at the same time, and then flows out in a concentrated manner to the first header (100).

8. The heat exchanger of any one of claims 1 to 5, further comprising:

the composite fin (600) is sleeved outside the heat exchange tube group (310) in the first heat exchange part (300) and the second heat exchange part (400).

9. The heat exchanger of claim 7, wherein the heat exchanger is configured to heat the heat exchanger,

the composite fin (600) is divided into a windward fin (610) and a leeward fin (620), the side surface of the windward fin (610) is of a smooth surface structure, and the side surface of the leeward fin (620) is provided with a window (621) or a protruding part (622).

10. An air conditioner, comprising: a heat exchanger according to any one of claims 1 to 9.