CN218120255U

CN218120255U - Heat exchanger and air conditioner

Info

Publication number: CN218120255U
Application number: CN202221715935.4U
Authority: CN
Inventors: 张心怡; 王飞; 许文明; 李阳; 蒋骏
Original assignee: Zhengzhou Haier Air Conditioner Co ltd; Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Zhengzhou Haier Air Conditioner Co ltd; Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-09-19
Filing date: 2022-06-30
Publication date: 2022-12-23
Anticipated expiration: 2032-06-30
Also published as: CN216694079U; CN216694077U; CN217357662U; CN216694081U; CN216694107U; CN216716626U; CN216977260U; CN116045486A; CN217817557U; CN217817549U; CN216745037U; CN216977258U; CN216977259U; CN114165946B; CN216744999U; CN217357658U; CN216744998U; CN114165946A; CN216716625U; CN216814680U

Abstract

The application relates to the technical field of air conditioners and discloses a heat exchanger. The heat exchanger is provided with a first refrigerant inlet and a second refrigerant outlet, and comprises a plurality of refrigerant pipes, a gas collecting pipe, a first flow dividing element and a second flow dividing element. The plurality of refrigerant pipes form a first heat exchange passage, a second heat exchange passage and a third heat exchange passage. The gas collecting pipe is respectively communicated with the first heat exchange passage and the third heat exchange passage and is communicated with the second heat exchange passage through a first bypass pipeline. The first flow dividing element is communicated with the first heat exchange passage and communicated with the second heat exchange passage through a second bypass pipeline. The second flow dividing element is communicated with the third heat exchange passage and communicated with the first flow dividing element through a third bypass pipeline. The second flow dividing element is communicated with the second refrigerant inlet and outlet, and the third bypass pipeline is provided with a first control valve. Wherein the first bypass line is provided with a second control valve and/or the second bypass line is provided with a third control valve. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner

Priority of chinese patent application entitled "dispenser, check valve, heat exchanger, refrigeration cycle, air conditioner," application No. 202122281454.9, filed in 2021, 9/19, this application is incorporated herein by reference in its entirety.

Technical Field

The application relates to the technical field of air conditioners, for example to a heat exchanger and an air conditioner.

Background

The heat exchanger is an important component of the air conditioner, the air conditioner exchanges heat with the environment through phase change of a refrigerant in the heat exchanger, and the heat is transmitted between the indoor environment and the outdoor environment through the circulating flow of the refrigerant. When the air conditioner is switched between the cooling mode and the heating mode, the heat exchanger is also switched between use as a condenser and use as an evaporator.

The related art provides a heat exchanger in which the paths of heat exchange lines through which refrigerant flows are the same and opposite in direction in a case where the heat exchanger is used as a condenser and in a case where the heat exchanger is used as an evaporator.

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 requirements of the refrigerant on the heat exchange pipeline are different under the condition that the heat exchanger is used as a condenser and under the condition that the heat exchanger is used as an evaporator. The heat exchanger provided in the related art cannot meet the difference between the requirements of the refrigerant on the heat exchange pipeline when the heat exchanger is used as a condenser and the requirements of the refrigerant on the heat exchange pipeline when the heat exchanger is used as an evaporator. The air conditioner can not exert the best refrigerating and heating capacity, and the use effect of the air conditioner is influenced.

SUMMERY OF THE UTILITY MODEL

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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a heat exchanger and an air conditioner, which can meet the difference between the requirements of a refrigerant on a heat exchange pipeline under the condition that the heat exchanger is used as a condenser and the requirements of the refrigerant on a heat exchange pipeline under the condition that the heat exchanger is used as an evaporator, so that the air conditioner can exert the optimal refrigerating and heating capacities, and the use effect of the air conditioner is improved.

In some embodiments, a first refrigerant inlet/outlet and a second refrigerant inlet/outlet are provided, and the heat exchanger includes; the heat exchanger comprises a first refrigerant inlet and outlet, a second refrigerant inlet and outlet and a plurality of refrigerant pipes, wherein the plurality of refrigerant pipes form a first heat exchange passage, a second heat exchange passage and a third heat exchange passage; the gas collecting pipe is respectively communicated with one end of the first heat exchange passage and one end of the third heat exchange passage; the gas collecting pipe is also communicated with one end of the second heat exchange passage through a first bypass pipeline; one end of the gas collecting pipe close to the first heat exchange passage is provided with the first refrigerant inlet and outlet; a first flow dividing element communicated with the other end of the first heat exchange passage; the first flow dividing element is communicated with the other end of the second heat exchange passage through a second bypass pipeline; and a second flow dividing element in communication with the other end of the third heat exchange passage, the second flow dividing element being in communication with the first flow dividing element through a third bypass line; the second flow dividing element is communicated with the second refrigerant inlet and outlet, and the third bypass pipeline is provided with a first control valve; wherein the first bypass pipeline is provided with a second control valve; and/or the second bypass line is provided with a third control valve.

In some embodiments, the first heat exchange passage, the second heat exchange passage and the third heat exchange passage are arranged in sequence from top to bottom; the second heat exchange passage is communicated with a first position of the gas collecting pipe, the third heat exchange passage is communicated with a second position of the gas collecting pipe, the first position is located at the lower part of the gas collecting pipe, and the second position is located at the lower part of the first position.

In some embodiments, a distance between the first position and the first refrigerant inlet/outlet is greater than 1/2 of a length of the header.

In some embodiments, a distance between the second position and the first refrigerant inlet/outlet is greater than 2/3 of a length of the header.

In some embodiments, the first heat exchange path comprises at least two first heat exchange branches connected in parallel; the second heat exchange path comprises at least two second heat exchange branches connected in parallel; and the third heat exchange path comprises at least two third heat exchange branches connected in parallel.

In some embodiments, the number of refrigerant pipes included in the first heat exchange branch is greater than or equal to the number of refrigerant pipes included in the second heat exchange branch.

In some embodiments, a fourth control valve is disposed inside the gas header; the communication position of the second heat exchange passage and the gas collecting pipe is positioned on one side of the fourth control valve, which is far away from the first refrigerant inlet and outlet.

In some embodiments, the first control valve comprises a one-way valve or a solenoid valve; wherein, in the case where the first control valve is a check valve, a direction of conduction of the check valve is defined to flow from the second flow dividing element to the first flow dividing element.

In some embodiments, the second control valve comprises a one-way valve or a solenoid valve; and/or, the third control valve comprises a one-way valve or a solenoid valve; wherein, under the condition that the second control valve is a one-way valve, the conduction direction of the one-way valve is defined to flow from the second heat exchange passage to the gas collecting pipe; in the case where the third control valve is a check valve, a communication direction of the check valve is defined to flow from the first flow dividing element to the second heat exchange passage.

In some embodiments, the air conditioner comprises the heat exchanger.

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

in the case of the heat exchanger as a condenser, the first control valve is in the closed state and the third control valve and/or the second control valve is in the closed state. After entering the heat exchanger from the first refrigerant inlet and outlet, the refrigerant flows through the first heat exchange passage, the second heat exchange passage and the third heat exchange passage in sequence and finally flows out of the heat exchanger through the second refrigerant inlet and outlet. The path of the refrigerant in the flow path in the heat exchanger is long, and the supercooling can be realized by fully exchanging heat. And in the case that the heat exchanger is an evaporator, the first control valve is in a conducting state, and the third control valve and/or the second control valve is/are in a conducting state. The refrigerant enters the heat exchanger from the second refrigerant inlet and outlet, flows through the first heat exchange passage, the second heat exchange passage and the third heat exchange passage respectively, converges in the gas collecting pipe, and then flows out of the heat exchanger through the first refrigerant inlet and outlet. The paths of the refrigerant in the flow path in the heat exchanger are more and shorter, so that the overlarge pressure loss caused by the overlong flow path can be avoided. The heat exchanger provided by the embodiment of the disclosure can meet the difference of the requirements of the refrigerant on the heat exchange pipeline under the condition that the heat exchanger is used as a condenser and the heat exchanger is used as an evaporator, so that the air conditioner can exert the optimal refrigerating and heating capacities, and the use effect of the air conditioner is improved.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:

FIG. 1 is a schematic diagram of a heat exchanger according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a refrigerant flow path of a heat exchanger serving as a condenser according to an embodiment of the disclosure;

fig. 3 is a schematic diagram of a refrigerant flow path of the heat exchanger as an evaporator according to the embodiment of the disclosure;

fig. 4 is a schematic structural diagram of an air conditioner according to an embodiment of the present disclosure.

Reference numerals are as follows:

01: a first refrigerant inlet and outlet; 02: a second refrigerant inlet and outlet; 1: a first heat exchange path; 2: a second heat exchange path; 21: a first bypass line; 22: a second bypass line; 3: a third heat exchange path; 4: a gas collecting pipe; 41: a first position; 42: a second position; 5: a first shunt element; 6: a second flow dividing element; 61: a third bypass line; 7: a refrigerant circulation circuit; 71: a compressor; 72: an indoor heat exchanger; 73: a throttling device; 74: an outdoor heat exchanger; 101: a first control valve; 102: a second control valve; 103: and a third control valve.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can 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. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

The heat exchanger is an important component of the air conditioner, the air conditioner exchanges heat with the environment through phase change of a refrigerant in the heat exchanger, and the heat is transmitted between the indoor environment and the outdoor environment through the circulating flow of the refrigerant. When the air conditioner is switched between the cooling mode and the heating mode, the heat exchanger is also switched between use as a condenser and use as an evaporator. The following description will be given by taking an air conditioner outdoor unit as an example: when the air conditioner is in a refrigeration mode, a refrigerant in an air conditioner outdoor unit releases heat, and the heat exchanger serves as a condenser at the moment; when the air conditioner is in a heating mode, the refrigerant in the air conditioner outdoor unit absorbs heat, and the heat exchanger is used as an evaporator.

The related art provides a heat exchanger in which the paths of heat exchange lines through which refrigerant flows are the same and opposite in direction in a case where the heat exchanger is used as a condenser and in a case where the heat exchanger is used as an evaporator. However, when the heat exchanger is used as an evaporator, the refrigerant in the heat exchange pipeline is in a low-temperature and low-pressure area, and the heat transfer performance is mainly constrained by the heat transfer coefficient and the pressure drop. The air conditioner is suitable for relatively more branches, and the pressure drop is greatly reduced while the heat transfer coefficient is ensured, so that the system pressure is improved, and the low-temperature heating capacity of the air conditioner is improved. When the heat exchanger is used as a condenser, the refrigerant in the heat exchange pipeline is in a high-temperature high-pressure area and is insensitive to pressure drop. The heat transfer performance is mainly influenced by the heat transfer coefficient, and the air conditioner is suitable for increasing the heat transfer coefficient by accelerating the circulation with fewer branches, thereby improving the high-temperature refrigerating capacity of the air conditioner. It is known that the demand of the refrigerant for the heat exchange line is different between the case where the heat exchanger is used as a condenser and the case where the heat exchanger is used as an evaporator. The heat exchanger provided in the related art cannot meet the difference between the requirements of the refrigerant on the heat exchange pipeline when the heat exchanger is used as a condenser and the requirements of the refrigerant on the heat exchange pipeline when the heat exchanger is used as an evaporator. The air conditioner can not exert the best refrigerating and heating capacity, and the use effect of the air conditioner is influenced.

Therefore, the embodiment of the disclosure provides a heat exchanger and an air conditioner, which can meet the difference between the requirements of a refrigerant on a heat exchange pipeline when the heat exchanger is used as a condenser and the requirements of the refrigerant on a heat exchange pipeline when the heat exchanger is used as an evaporator, so that the air conditioner can exert the optimal refrigerating and heating capacities, and the use effect of the air conditioner is improved.

In one aspect, embodiments of the present disclosure provide a heat exchanger.

Referring to fig. 1, the heat exchanger provided in the embodiment of the present disclosure is provided with a first refrigerant inlet/outlet 01 and a second refrigerant inlet/outlet 02. The heat exchanger comprises; a plurality of refrigerant pipes, a header 4, a first flow dividing element 5 and a second flow dividing element 6.

The plurality of refrigerant pipes form a first heat exchange passage 1, a second heat exchange passage 2 and a third heat exchange passage 3. The gas collecting pipe 4 is respectively communicated with one end of the first heat exchange passage 1 and one end of the third heat exchange passage 3. The gas collecting pipe 4 is also communicated with one end of the second heat exchange passage 2 through a first bypass pipeline 21. One end of the gas collecting pipe 4 close to the first heat exchange passage 1 is provided with a first refrigerant inlet and outlet 01. The first flow dividing element 5 communicates with the other end of the first heat exchange path 1. The first flow dividing element 5 communicates with the other end of the second heat exchange path 2 through a second bypass line 22. The second flow dividing element 6 communicates with the other end of the third heat exchange path 3, and the second flow dividing element 6 communicates with the first flow dividing element 5 through a third bypass line 61. The second flow dividing element 6 is communicated with the second refrigerant inlet and outlet 02, and the third bypass pipeline 61 is provided with a first control valve 101. Wherein the first bypass line 21 is provided with a second control valve 102 and/or the second bypass line 22 is provided with a third control valve 103.

Therefore, in the case where the heat exchanger provided in the embodiment of the present disclosure is used as a condenser, the first control valve 101 is in a closed state, and the third control valve 103 and/or the second control valve 102 is in a closed state. Referring to fig. 2, after entering the heat exchanger from the first refrigerant inlet/outlet 01, the refrigerant flows through the first heat exchange path 1, the second heat exchange path 2, the third heat exchange path 3 in sequence, and finally flows out of the heat exchanger through the second refrigerant inlet/outlet 02. The path of the refrigerant in the flow path in the heat exchanger is long, and the supercooling can be realized by fully exchanging heat. In the case where the heat exchanger is an evaporator, the first control valve 101 is in a conducting state, and the third control valve 103 and/or the second control valve 102 is in a conducting state. Referring to fig. 3, the refrigerant enters the heat exchanger from the second refrigerant inlet/outlet 02, flows through the first heat exchange path 1, the second heat exchange path 2 and the third heat exchange path 3, converges in the gas collecting pipe 4, and flows out of the heat exchanger through the first refrigerant inlet/outlet 01. The paths of the refrigerant in the flow path in the heat exchanger are more and shorter, so that the overlarge pressure loss caused by the overlong flow path can be avoided. The heat exchanger provided by the embodiment of the disclosure can meet the difference of the requirements of the refrigerant on the heat exchange pipeline under the condition that the heat exchanger is used as a condenser and under the condition that the heat exchanger is used as an evaporator, so that the air conditioner can exert the optimal refrigerating and heating capacities, and the use effect of the air conditioner is improved.

It can be understood that, in the case of the heat exchanger as a condenser, the high-temperature and high-pressure gaseous refrigerant enters the header 4 from the first refrigerant inlet/outlet 01. The gaseous refrigerant of high temperature and high pressure has a relatively low density and tends to gather more at the upper part of the header 4, so that more refrigerant enters the first heat exchange path 1.

Optionally, the first control valve 101 comprises a one-way valve or a solenoid valve. In the case where the first control valve 101 is a check valve, the direction of conduction of the check valve is defined to flow from the second flow dividing element 6 to the first flow dividing element 5.

Wherein the first bypass line 21 is provided with the second control valve 102, and/or the second bypass line 22 is provided with the third control valve 103 comprises the following three conditions: the first bypass line 21 is provided with the second control valve 102 and the second bypass line 22 is not provided with a control valve; the second bypass line 22 is provided with a third control valve 103 and the first bypass line 21 is not provided with a control valve; the first bypass line 21 is provided with a second control valve 102 and the second bypass line 22 is provided with a third control valve 103.

The second control valve 102 is disposed on the first bypass line 21 and/or the third control valve 103 is disposed on the second bypass line 22, so that the refrigerant entering the gas collecting pipe 4 from the first refrigerant inlet/outlet 01 can be prevented from directly entering the second heat exchange path 2 through the inside of the gas collecting pipe 4. So set up, be favorable to making the refrigerant flow according to the route of setting for, improve the heat transfer effect of heat exchanger.

Optionally, the second control valve 102 comprises a one-way valve or a solenoid valve. In the case where the second control valve 102 is a check valve, the conduction direction of the check valve is defined to be from the second heat exchange path 2 to the gas header 4.

Optionally, the third control valve 103 comprises a check valve or a solenoid valve. In case the third control valve 103 is a one-way valve, the conducting direction of the one-way valve is defined to flow from the first flow dividing element 5 to the second heat exchange path 2.

Alternatively, the first heat exchange path 1, the second heat exchange path 2, and the third heat exchange path 3 are sequentially arranged from top to bottom. Wherein the second heat exchange path 2 is communicated with a first position 41 of the gas collecting pipe 4, the third heat exchange path 3 is communicated with a second position 42 of the gas collecting pipe 4, the first position 41 is positioned at the lower part of the gas collecting pipe 4, and the second position 42 is positioned at the lower part of the first position 41.

So set up, be favorable to making the refrigerant flow according to the route of setting for, improve the heat transfer effect of heat exchanger.

Specifically, in the case where the heat exchanger is used as a condenser, a high-temperature and high-pressure gaseous refrigerant enters the gas header 4 through the first refrigerant inlet/outlet 01. The gaseous refrigerant at high temperature and high pressure has relatively low density and tends to gather in the upper part of the header 4. Through setting up first heat transfer route 1, second heat transfer route 2 and third heat transfer route 3 from last to down in proper order and second heat transfer route 2 and third heat transfer route 3 all communicate with the lower part of discharge collector 4, be favorable to making more refrigerant get into first heat transfer route 1, make the refrigerant flow according to the route of setting for.

Under the condition that the heat exchanger is used as an evaporator, the refrigerant absorbs heat and evaporates into a gaseous refrigerant after flowing through the plurality of heat exchange passages, and leaves the heat exchanger from the first refrigerant inlet/outlet 01. The first refrigerant inlet and outlet 01 is arranged at the top of the gas collecting pipe 4, and the gaseous refrigerant can flow in the gas collecting pipe 4 more smoothly and flows out of the gas collecting pipe 4 from the first refrigerant inlet and outlet 01. Therefore, the flowing effect of the refrigerant in the heat exchanger can be improved, and the heat exchange efficiency of the heat exchanger is further improved.

Optionally, the distance between the first position 41 and the first refrigerant inlet/outlet 01 is greater than 1/2 of the length of the header 4.

With such an arrangement, when the heat exchanger is used as a condenser, the amount of the refrigerant entering the second heat exchange passage 2 from the first position 41 can be reduced, and the refrigerant can flow along a set route.

Optionally, the distance between the second position 42 and the first refrigerant inlet/outlet 01 is greater than 2/3 of the length of the header 4.

With such an arrangement, when the heat exchanger is used as a condenser, the amount of the refrigerant entering the third heat exchange passage 3 from the second position 42 is reduced, so that the refrigerant flows along a set route.

Alternatively, referring to fig. 1, the first heat exchange path 1 comprises at least two first heat exchange branches connected in parallel. The second heat exchange path 2 comprises at least two second heat exchange branches connected in parallel. And, the third heat exchange path 3 includes at least two third heat exchange branches connected in parallel.

The first heat exchange passage 1, the second heat exchange passage 2 and the third heat exchange passage 3 respectively comprise at least two heat exchange branch circuits connected in parallel, the number of heat exchange tubes of the heat exchanger is increased, and the heat exchange effect of the heat exchanger is further improved.

And the single pipe body structures in the first heat exchange branch, the second heat exchange branch and the third heat exchange branch adopt the same structural design. For example, the pipe diameters of the single pipe bodies in the first heat exchange branch, the second heat exchange branch and the third heat exchange branch are consistent, the pipe wall thicknesses are uniform, the curvatures and the lengths of the bent pipes are the same, and the like. So that the refrigerant can flow uniformly in the heat exchanger, the unstable change of the pressure and the flow speed of the refrigerant caused by the change of the pipe diameter is avoided, and the heat exchange between the refrigerant and the ambient environment can be realized stably when the refrigerant flows through the heat exchanger.

The above-mentioned body definition mainly is to the division that each part pipeline down of refrigeration flow played the refrigerant, but does not constitute the restriction to structural design, the heat transfer effect of heating flow direction etc. of this application heat exchanger.

Optionally, the heat exchanger provided by the embodiment of the present disclosure further includes a third flow dividing element. Referring to fig. 1, one end of the third flow dividing element is communicated with the second flow dividing element 6, and the other end of the third flow dividing element is respectively communicated with at least two third heat exchanging branches connected in parallel.

Optionally, in a case that the second heat exchange path 2 includes at least two second heat exchange branches connected in parallel, a control valve is disposed on a pipeline connecting each second heat exchange branch with the gas collecting pipe 4, and/or a control valve is disposed on a pipeline connecting each second heat exchange branch with the first flow dividing element 5.

Optionally, the number of refrigerant pipes included in the first heat exchange branch is greater than or equal to the number of refrigerant pipes included in the second heat exchange branch.

In the case where the heat exchanger provided in the embodiment of the present disclosure is used as a condenser, a part of the refrigerant flows from the first refrigerant inlet/outlet 01 to the first position 41. The number of refrigerant pipes included in the first heat exchange branch is greater than or equal to that of refrigerant pipes included in the second heat exchange branch, so that more refrigerants enter the first heat exchange branch. At the first position 41, the pressure of the refrigerant flowing out of the second heat exchange branch is greater than the pressure of the refrigerant flowing from the first refrigerant inlet/outlet 01 to the first position 41 through the gas collecting pipe 4, which is beneficial to enabling the refrigerant to flow according to a set route and improving the heating effect of the air conditioner.

Optionally, a fourth control valve is provided inside the header 4. The communication position of the second heat exchange passage 2 and the gas collecting pipe 4 is positioned on one side of the fourth control valve far away from the first refrigerant inlet/outlet 01.

In the case of the heat exchanger as a condenser, the fourth control valve is closed, and the refrigerant entering the gas collecting pipe 4 from the first refrigerant inlet/outlet 01 is prevented from directly flowing to the first position 41 through the inside of the gas collecting pipe 4. In this way, the refrigerant enters the first heat exchange path 1, then flows through the second heat exchange path 2 and the third heat exchange path 3 in sequence, and flows according to a set route. In the case of the heat exchanger as an evaporator, the fourth control valve is opened to allow the refrigerant to pass through the inside of the header 4. The arrangement is favorable for enabling the refrigerant to flow according to the set route, and the heating effect of the air conditioner is improved.

Optionally, the fourth control valve comprises a one-way valve or a solenoid valve.

In case the fourth control valve is a check valve, the conducting direction of the check valve is defined to flow from the first position 41 to the first refrigerant inlet/outlet 01.

In another aspect, an embodiment of the present disclosure provides an air conditioner.

The air conditioner provided by the embodiment of the disclosure comprises the heat exchanger.

According to the heat exchanger provided by the embodiment of the disclosure, when the air conditioner is in a heating mode and the air conditioner is in a cooling mode, the refrigerant flows through the optimal heat exchange pipeline. The air conditioner can exert the best refrigerating and heating capacity and has better heating or refrigerating effect.

Specifically, referring to fig. 4, an air conditioner according to an embodiment of the present disclosure includes a refrigerant circulation circuit 7, and a compressor 71, an indoor heat exchanger 72, a throttling device 73, and an outdoor heat exchanger 74 sequentially disposed on the refrigerant circulation circuit 7. The indoor heat exchanger 72 and/or the outdoor heat exchanger 74 are the heat exchangers described above.

The above description and the drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify 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

1. A heat exchanger is characterized in that a first refrigerant inlet and outlet (01) and a second refrigerant inlet and outlet (02) are arranged, and the heat exchanger comprises;

a plurality of refrigerant tubes, wherein the refrigerant tubes form a first heat exchange passage (1), a second heat exchange passage (2) and a third heat exchange passage (3);

the gas collecting pipe (4) is communicated with one end of the first heat exchange passage (1) and one end of the third heat exchange passage (3) respectively; the gas collecting pipe (4) is also communicated with one end of the second heat exchange passage (2) through a first bypass pipeline (21); one end of the gas collecting pipe (4) close to the first heat exchange passage (1) is provided with the first refrigerant inlet and outlet (01);

a first flow dividing element (5) communicating with the other end of the first heat exchange path (1); the first flow dividing element (5) is communicated with the other end of the second heat exchange passage (2) through a second bypass pipeline (22); and the combination of (a) and (b),

a second flow dividing element (6) communicating with the other end of the third heat exchange passage (3), the second flow dividing element (6) communicating with the first flow dividing element (5) through a third bypass line (61); the second flow dividing element (6) is communicated with the second refrigerant inlet and outlet (02), and the third bypass pipeline (61) is provided with a first control valve (101);

wherein the first bypass line (21) is provided with a second control valve (102); and/or the second bypass line (22) is provided with a third control valve (103).

2. The heat exchanger of claim 1,

the first heat exchange passage (1), the second heat exchange passage (2) and the third heat exchange passage (3) are sequentially arranged from top to bottom;

wherein the second heat exchange passage (2) is in communication with a first location (41) of the header (4), the third heat exchange passage (3) is in communication with a second location (42) of the header (4), and the first location (41) is located at a lower portion of the header (4) and the second location (42) is located at a lower portion of the first location (41).

3. The heat exchanger of claim 2,

the distance between the first position (41) and the first refrigerant inlet and outlet (01) is larger than 1/2 of the length of the gas collecting pipe (4).

4. The heat exchanger of claim 2,

the distance between the second position (42) and the first refrigerant inlet and outlet (01) is greater than 2/3 of the length of the gas collecting pipe (4).

5. The heat exchanger of claim 1,

the first heat exchange passage (1) comprises at least two first heat exchange branches connected in parallel;

the second heat exchange passage (2) comprises at least two second heat exchange branches connected in parallel; and the number of the first and second electrodes,

the third heat exchange passage (3) comprises at least two third heat exchange branches connected in parallel.

6. The heat exchanger of claim 5,

the number of refrigerant pipes included in the first heat exchange branch is greater than or equal to that of refrigerant pipes included in the second heat exchange branch.

7. The heat exchanger of claim 1,

a fourth control valve is arranged inside the gas collecting pipe (4); the communication position of the second heat exchange passage (2) and the gas collecting pipe (4) is positioned on one side of the fourth control valve, which is far away from the first refrigerant inlet and outlet (01).

8. The heat exchanger of claim 1,

the first control valve (101) comprises a one-way valve or a solenoid valve;

wherein, in case the first control valve (101) is a one-way valve, the conducting direction of the one-way valve is defined to flow from the second flow dividing element (6) to the first flow dividing element (5).

9. The heat exchanger of claim 1,

the second control valve (102) comprises a one-way valve or a solenoid valve; and/or the presence of a gas in the gas,

the third control valve (103) comprises a check valve or a solenoid valve;

wherein, in case the second control valve (102) is a one-way valve, the conducting direction of the one-way valve is defined to flow from the second heat exchange passage (2) to the gas header (4); in case the third control valve (103) is a one-way valve, the conducting direction of the one-way valve is defined to flow from the first flow dividing element (5) to the second heat exchanging channel (2).

10. An air conditioner is characterized in that the air conditioner comprises a shell,

comprising a heat exchanger according to any one of claims 1 to 9.