Heat exchanger and air conditioner

Abstract

The utility model relates to the technical field of air conditioners and discloses a heat exchanger and an air conditioner. The heat exchanger comprises heat exchanger units, and one heat exchanger unit comprises a heat exchange tube set comprising heat exchange tubes; the multiple collecting pipes comprise the first collecting pipe and the second collecting pipe, and the first collecting pipe and the second collecting pipe communicate with the two ends of the heat exchange pipe set correspondingly; the first valve body part is positioned in the first header and divides the first header into a first chamber and a second chamber; the second valve body part is positioned in the second header and divides the second header into a third chamber and a fourth chamber; when the heat exchanger serves as a condenser, a refrigerant sequentially flows through the first cavity, the third cavity, the second cavity and the fourth cavity through the heat exchange pipe set and then flows out. When the heat exchanger serves as an evaporator, a refrigerant flows through the third cavity and the second cavity from the fourth cavity through the heat exchange pipe set and then flows out of the first cavity. Therefore, the heat exchange efficiency when the heat exchanger refrigerates and serves as a condenser is guaranteed, and the structure in the heat exchanger is simplified.

Description

[0001] This application claims priority to the Chinese patent application entitled “Heat Exchanger and Air Conditioner” filed on February 20, 2024 and application number 202420311415.X, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of air conditioning, for example, to a heat exchanger and an air conditioner. Background Art

[0003] At present, air conditioners generally consist of a compressor, an outdoor heat exchanger, a throttling device, a four-way valve and an indoor heat exchanger to form a refrigerant circulation loop, and the flow direction of the refrigerant in the refrigerant circulation loop is changed by the four-way valve, thereby realizing the cooling function and heating function of the air conditioner respectively. When the heat exchanger is in the heating flow direction, the refrigerant in the heat exchange tube is in a high temperature and high pressure zone and is not sensitive to pressure drop. The heat transfer performance is mainly affected by the heat transfer coefficient. Therefore, it is suitable for the heat exchange tube to adopt a smaller number of branches to accelerate the circulation and increase the heat transfer coefficient; and when the heat exchanger is in the cooling flow direction, the refrigerant in the heat exchange tube is in a low temperature and low pressure zone. The heat transfer performance is mainly constrained by the heat transfer coefficient and the pressure drop. Therefore, it is suitable for the heat exchange tube to adopt a larger number of branches to ensure the heat transfer coefficient while significantly reducing the pressure drop and increasing the system pressure.

[0004] In the prior art, when the heat exchanger is in the heating flow direction, the flow direction of the refrigerant circulation loop changes. At this time, the refrigerant needs to flow in the opposite direction along the flow path of the heat exchanger in the cooling flow direction. At this time, the long flow path is not conducive to the rapid circulation of the refrigerant, resulting in a decrease in the overall heat exchange efficiency of the air conditioner.

[0005] A heat exchanger is disclosed in the related art, and the heat exchanger includes: a first heat exchange pipeline, a first subcooling pipeline, and a second subcooling pipeline. The first subcooling pipeline is connected to the first heat exchange pipeline; the second subcooling pipeline is connected to the first heat exchange pipeline; wherein the first subcooling pipeline and the second subcooling pipeline are connected to the same end of the first heat exchange pipeline, when the heat exchanger is cooling, the refrigerant flows from the first heat exchange pipeline to the first subcooling pipeline and the second subcooling pipeline respectively, and then flows out through the first subcooling pipeline and the second subcooling pipeline; when the heat exchanger is heating, the refrigerant flows from the first subcooling pipeline and the second subcooling pipeline to the first heat exchange pipeline respectively, and then flows out through the first heat exchange pipeline.

[0006] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0007] The heat exchanger in the related art is provided with a first heat exchange pipeline, a first subcooling pipeline and a second subcooling pipeline. This requires changing the pipeline layout in the heat exchanger, making the structure of the heat exchanger still complicated, inconvenient for the maintenance and production of the heat exchanger, and increasing the cost of the heat exchanger.

[0008] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0009] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0010] The embodiments of the present disclosure provide a heat exchanger and an air conditioner, so as to improve the cooling and heating effects of the heat exchanger while further simplifying the structure of the heat exchanger and reducing the cost of the heat exchanger.

[0011] The embodiment of the present disclosure provides a heat exchanger, the heat exchanger includes a heat exchange unit, and the heat exchange unit includes: a heat exchange tube group, including heat exchange tubes; a plurality of headers, the plurality of headers including a first header and a second header, the first header and the second header are respectively connected to the two ends of the heat exchange tube group; a first valve body part, located in the first header, dividing the first header into a first chamber and a second chamber, the first chamber and the second chamber are both connected to the heat exchange tube group, when the refrigerant flows from the second chamber to the first chamber, the first valve body part is turned on; the second valve body part is located in the second header, dividing the second header into a third chamber and a fourth chamber The third chamber and the fourth chamber are all connected to the heat exchange tube group, and when the refrigerant flows from the fourth chamber to the third chamber, the second valve body is connected; wherein, when the heat exchanger is used as a condenser, the refrigerant flows in from the first chamber, the first valve body and the second valve body are both closed, and the refrigerant flows through the first chamber, the third chamber, the second chamber and the fourth chamber in sequence through the heat exchange tube group and then flows out; when the heat exchanger is used as an evaporator, the refrigerant flows in from the fourth chamber, the first valve body and the second valve body are both connected, and the refrigerant flows through the heat exchange tube group from the fourth chamber through the third chamber and the second chamber respectively and then flows out from the first chamber.

[0012] Optionally, the heat exchange tube group of a heat exchanger unit includes: a first heat exchange tube, one end of which is connected to the first chamber, and the other end of the first heat exchange tube is connected to the third chamber; a second heat exchange tube, one end of which is connected to the second chamber, and the other end of the second heat exchange tube is connected to the third chamber; a third heat exchange tube, one end of which is connected to the second chamber, and the other end of the third heat exchange tube is connected to the fourth chamber.

[0013] Optionally, the first chamber is provided with a first inlet and outlet, and the first inlet and outlet are used for the gaseous refrigerant to enter and exit; the fourth chamber is provided with a second inlet and outlet, and the second inlet and outlet are used for the refrigerant containing liquid refrigerant to enter and exit.

[0014] Optionally, the heat exchange tube group of a heat exchanger unit includes: a fourth heat exchange tube, one end of which is connected to the first chamber, and the other end of the fourth heat exchange tube is connected to the third chamber.

[0015] Optionally, the heat exchanger includes a valve body portion, which is located in the manifold, and the valve body portion includes: a valve seat, which is located in the manifold and separates the manifold into a first manifold cavity and a second manifold cavity, and the valve seat is configured with a connecting hole, which can connect the first manifold cavity and the second manifold cavity; a valve shell, which is located on the side of the valve seat facing the first manifold cavity and is movably located at the connecting hole, and the maximum cross-sectional area of ​​the valve seat is greater than the cross-sectional area of ​​the connecting hole, and is used to open or close the connecting hole; wherein the valve body portion includes a first valve body portion and / or a second valve body portion, the first manifold cavity includes a first chamber and / or a third chamber, and the second manifold cavity includes a second chamber and / or a fourth chamber.

[0016] Optionally, the valve body also includes: a valve core, connected to the valve housing; a guide rail, fixedly arranged on the side of the connecting hole toward the first collecting pipe cavity and extending along the axial direction of the collecting pipe, and the valve core is movably arranged on the guide rail; wherein, when the valve core moves along the guide rail in a direction approaching the connecting hole, the valve housing abuts against the valve seat to close the connecting hole; when the valve core moves along the guide rail in a direction away from the connecting hole, the valve housing separates from the valve seat to open the connecting hole.

[0017] Optionally, the valve body also includes: a fixing seat connected to the manifold, located on a side of the guide rail away from the valve seat, and connected to the guide rail for fixing the guide rail.

[0018] Optionally, the heat exchanger comprises a plurality of heat exchanger units.

[0019] Optionally, the heat exchanger also includes: an air collecting pipe, which is provided with a third inlet and outlet and is connected to the first inlet and outlet of multiple heat exchanger units; a distributor, one end of which is connected to the second inlet and outlet of multiple heat exchanger units and the other end of which is provided with a fourth inlet and outlet; wherein the multiple heat exchanger units are connected in parallel between the air collecting pipe and the distributor.

[0020] An embodiment of the present disclosure further provides an air conditioner, which includes the heat exchanger described in any one of the above embodiments.

[0021] The heat exchanger and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0022] The heat exchanger in the embodiment of the present disclosure includes one or more heat exchange units, one heat exchange unit includes a heat exchange tube group, the heat exchange tube group includes a plurality of heat exchange tubes, the plurality of heat exchange tubes are connected between the first header and the second header, and the first header and the second header are both provided with valve bodies, so that the first header and the second header can be conducted only in a specific direction under the control of the valve body, and when the refrigerant flows in the reverse direction, the valve body can be closed, and the two chambers in the header will not be connected. In the embodiment of the present disclosure, when the heat exchanger is used as a condenser, the refrigerant flows in from the first chamber, the first valve body is closed, and then flows from the first chamber into the heat exchange tube of the heat exchange tube group, and then flows into the third chamber of the second header through the heat exchange tube, the second valve body is closed, and the refrigerant flows from the third chamber into the heat exchange tube group, and then flows into the second chamber through the heat exchange tube group, and then flows from the second chamber into the fourth chamber through the heat exchange tube group, and finally out of the fourth chamber. In this way, when the heat exchanger is used as a condenser, the flow path of the refrigerant becomes longer, the flow branch becomes shorter, the flow speed is accelerated, and the circulation is improved, the heat transfer coefficient inside the tube is increased, and the heat exchange efficiency is improved.

[0023] When the heat exchanger is used as an evaporator, the refrigerant flows in from the fourth chamber of the second header, the second valve body is turned on, a part of the refrigerant in the fourth chamber flows to the third chamber, another part of the refrigerant in the fourth chamber flows into the heat exchange tube group, and then flows into the second chamber through the heat exchange tube group. The refrigerant flowing into the third chamber can flow into the first chamber along the heat exchange tube group, and the refrigerant in the second chamber can also flow into the first chamber, and finally flow out of the first chamber. In this way, when the heat exchanger is used as an evaporator, the refrigerant flows through more branches, which can effectively reduce the pressure drop of the refrigerant along the way and improve the heat exchange efficiency.

[0024] The heat exchanger of the disclosed embodiment does not need to change the piping arrangement of the heat exchanger, and only needs to set a valve body portion in the collecting pipe. This can ensure the heat exchange efficiency of the heat exchanger when cooling and acting as a condenser, while simplifying the structure inside the heat exchanger, facilitating the maintenance and production of the heat exchanger and reducing the cost of the heat exchanger.

[0025] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0027] Figure 1 is a structural schematic diagram of a heat exchanger unit provided in an embodiment of the present disclosure;

[0028] Figure 2is a schematic diagram of a refrigerant flow structure when a heat exchanger unit provided by an embodiment of the present disclosure is used as a condenser;

[0029] Figure 3 is a schematic diagram of a refrigerant flow structure when a heat exchanger unit provided by an embodiment of the present disclosure is used as an evaporator;

[0030] Figure 4 is a schematic diagram of a refrigerant flow structure when another heat exchanger unit provided in an embodiment of the present disclosure is used as a condenser;

[0031] Figure 5 is a schematic diagram of a refrigerant flow structure when another heat exchanger unit provided in an embodiment of the present disclosure is used as an evaporator;

[0032] Figure 6 is a structural schematic diagram of a manifold and a valve body provided by an embodiment of the present disclosure;

[0033] Figure 7 is a schematic structural diagram of a valve body provided by an embodiment of the present disclosure when it is turned on;

[0034] Figure 8 is a schematic diagram of a top view of a valve body provided by an embodiment of the present disclosure;

[0035] Fig. 9 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure;

[0036] Fig.10 It is a schematic diagram of the top view of the structure of another heat exchanger provided in an embodiment of the present disclosure.

[0037] Reference numerals:

[0038] 10. heat exchange tube group; 101. first heat exchange tube; 102. second heat exchange tube; 103. third heat exchange tube; 104. fourth heat exchange tube; 105. fin; 20. header; 201. first header; 202. second header; 203. first chamber; 2031. first inlet and outlet; 204. second chamber; 205. third chamber; 206. fourth chamber; 2061. second inlet and outlet; 207. first header chamber; 208. second header chamber; 3 0. Valve body; 301. First valve body; 302. Second valve body; 303. Valve seat; 304. Connecting hole; 305. Valve shell; 306. Valve core; 307. Guide rail; 308. Fixed seat; 309. Cantilever; 50. Heat exchanger unit; 501. First heat exchanger unit; 502. Second heat exchanger unit; 503. Third heat exchanger unit; 504. Gas collecting pipe; 505. Distributor; 506. First connecting pipe; 507. Second connecting pipe. DETAILED DESCRIPTION

[0039] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0040] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0042] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] Unless otherwise stated, the term "plurality" means two or more.

[0044] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0046] For ease of description, Figure 2 , Figure 3 , Figure 4 and Figure 5 The arrows in the diagram indicate the direction of refrigerant flow in the heat exchanger.

[0047] Combination Figures 1 to 10 As shown, an embodiment of the present disclosure provides a heat exchanger, which includes one or more heat exchanger units 50 , and one heat exchanger unit 50 includes a heat exchange tube group 10 , a header 20 and a valve body 30 . The heat exchange tube group 10 includes one or more heat exchange tubes; the number of the headers 20 is multiple, and the multiple headers 20 include a first header 201 and a second header 202, and the first header 201 and the second header 202 are respectively connected to the two ends of the heat exchange tube group 10; the valve body 30 is located in the header 20, and the number of the valve body 30 is multiple, and the multiple valve body 30 includes a first valve body 301 and a second valve body 302, the first valve body 301 is located in the first header 201, and the first header 201 is divided into a first chamber 203 and a second chamber 204, when the refrigerant flows from the second chamber 204 to the first chamber 203, the first valve body 301 is turned on, the second valve body 302 is located in the second header 202, and the second header 202 is divided into a third chamber 205 and a fourth chamber 206, when the refrigerant flows from the fourth chamber 206 to the third chamber 205, the second valve body 302 is turned on. Figure 2 As shown, when the heat exchanger is used as a condenser, the refrigerant flows in from the first chamber 203, the first valve body 301 and the second valve body 302 are both closed, and the refrigerant flows through the first chamber 203, the third chamber 205, the second chamber 204 and the fourth chamber 206 in sequence through the heat exchange tube group 10 and then flows out; Figure 3 As shown, when the heat exchanger is used as an evaporator, that is, when the heat exchanger is used as an evaporator, the refrigerant flows in from the fourth chamber 206, the first valve body 301 and the second valve body 302 are both connected, and the refrigerant flows from the fourth chamber 206 through the third chamber 205 and the second chamber 204 respectively through the heat exchange tube group 10, and then flows out from the first chamber 203.

[0048] In the embodiment of the present disclosure, the heat exchanger includes one or more heat exchanger units 50, and one heat exchanger unit 50 is the minimum unit of the heat exchanger. That is, the heat exchanger may include only one heat exchanger unit 50 or may include multiple heat exchanger units 50. One heat exchanger unit 50 includes a heat exchange tube group 10 and a header 20, and a first header 201 and a second header 202 are respectively connected at both ends of the heat exchange tube group 10. The first valve body 301 is located in the first header 201, and the first header 201 is divided into a first chamber 203 and a second chamber 204, and the first valve body 301 is defined as being open when the refrigerant flows from the second chamber 204 to the first chamber 203, and the first valve body 301 is closed when the refrigerant flows from the first chamber 203 to the second chamber 204, so that the refrigerant in the first header 201 can only flow from the second chamber 204 to the first chamber 203, and cannot flow from the first chamber 203 to the second chamber 204. Similarly, the second valve body portion 302 is located in the second collecting pipe 202, and the second valve body portion 302 is limited to be open when the refrigerant flows from the fourth chamber 206 to the third chamber 205, and closed when the refrigerant flows from the third chamber 205 to the fourth chamber 206. In this way, the refrigerant in the second collecting pipe 202 can only flow from the fourth chamber 206 to the third chamber 205, and cannot flow from the third chamber 205 to the fourth chamber 206.

[0049] Therefore, when the heat exchanger is used as a condenser, the refrigerant flows in from the first chamber 203. Under the closing action of the first valve body 301, the refrigerant in the first chamber 203 can only flow into the heat exchange tube group 10 connected to the header 20, and then flow from the heat exchange tube group 10 into the third chamber 205 of the second header 202. The heat exchange tube cannot flow from the third chamber 205 to the fourth chamber 206, and can only flow from the third chamber 205 into the heat exchange tube group 10 again, and then flow into the second chamber 204 through the heat exchange tube group 10. Under the flow pressure of the refrigerant, the refrigerant flows from the second chamber 204 through the heat exchange tube group 10 into the fourth chamber 206, and finally flows out from the fourth chamber 206. In this way, when the heat exchanger is used as a condenser, the branch of the refrigerant flow is smaller, the refrigerant will not be diverted, the refrigerant flow speed is faster, and the heat exchange efficiency is improved.

[0050] When the heat exchanger is used as an evaporator, the refrigerant flows in from the fourth chamber 206. Since the refrigerant in the second header 202 can flow from the fourth chamber 206 to the third chamber 205, the refrigerant flowing into the fourth chamber 206 will be split, with one part flowing to the third chamber 205 and another part flowing into the heat exchange tube group 10 connected to the fourth chamber 206. The refrigerant in the third chamber 205 then flows into the heat exchange tube group 10 and finally flows into the first chamber 203. The refrigerant flowing into the heat exchange tube group 10 from the fourth chamber 206 flows into the second chamber 204, then flows from the second chamber 204 into the first chamber 203 and finally flows out from the first chamber 203. In this way, when the heat exchanger is used as an evaporator, the refrigerant is split, the flow branches are increased, the pressure drop of the refrigerant along the way is reduced, and the heat exchange efficiency is improved.

[0051] Optionally, the heat exchange tube group 10 of a heat exchanger unit 50 includes a first heat exchange tube 101, a second heat exchange tube 102 and a third heat exchange tube 103, one end of the first heat exchange tube 101 is connected to one end of the first header 201, and the other end of the first heat exchange tube 101 is connected to one end of the second header 202; one end of the second heat exchange tube 102 is connected to one end of the first header 201, and the other end of the second heat exchange tube 102 is connected to one end of the second header 202; one end of the third heat exchange tube 103 is connected to one end of the first header 201, and the other end of the third heat exchange tube 103 is connected to one end of the second header 202; wherein the first valve body 301 is located between one end of the first heat exchange tube 101 and one end of the second heat exchange tube 102; the second valve body 302 is located between the other end of the second heat exchange tube 102 and the other end of the third heat exchange tube 103 where heat is generated. That is to say, one end of the first heat exchange tube 101 is connected to the first chamber 203, and the other end of the first heat exchange tube 101 is connected to the third chamber 205; one end of the second heat exchange tube 102 is connected to the second chamber 204, and the other end of the second heat exchange tube 102 is connected to the third chamber 205; one end of the third heat exchange tube 103 is connected to the second chamber 204, and the other end of the third heat exchange tube 103 is connected to the fourth chamber 206.

[0052] In the disclosed embodiment, the heat exchange tube group 10 of a heat exchanger unit 50 includes at least three heat exchange tubes, so that the refrigerant can flow into the first header 201 and flow out of the second header 202, or the refrigerant can flow into the second header 202 and flow out of the first header 201, thereby realizing the heat exchange cycle of the heat exchanger. Specifically, when the heat exchanger is used as a condenser, the refrigerant flows into the first chamber 203, then flows from the first chamber 203 through the first heat exchange tube 101, the third chamber 205, the second heat exchange tube 102, the second chamber 204, the third heat exchange tube 103 and the fourth chamber 206 in sequence, and then flows out from the second inlet and outlet 2061; when the heat exchanger is used as an evaporator, the refrigerant flows from the second inlet and outlet 2061 into the fourth chamber 206, and then flows into the third chamber 205 and the third heat exchange tube 103 respectively. The refrigerant in the third chamber 205 flows to the first heat exchange tube 101 and the second heat exchange tube 102 respectively. The refrigerant in the second heat exchange tube 102 and the third heat exchange tube 103 flows to the second chamber 204 and then flows into the first chamber 203. The refrigerant in the first heat exchange tube 101 flows to the first chamber 203 and then flows out. By cooperating the first heat exchange tube 101, the second heat exchange tube 102 and the third heat exchange tube 103 with the two headers 20, it is possible to reduce branches and increase the flow rate when the heat exchanger is used as a condenser. When used as an evaporator, the flow branches are increased and the pressure drop is reduced, so that the heat exchange efficiency can be improved when used for refrigeration or as a condenser. In addition, there is no need to change the structure of the heat exchange tube, which reduces the complexity of the heat exchanger and reduces the production cost and maintenance cost of the heat exchanger.

[0053] Optionally, the first valve body 301 may be a one-way valve or a solenoid valve.

[0054] Optionally, the second valve body 302 may be a one-way valve or a solenoid valve, etc. It can be understood that when the heat exchanger can be used for cooling and heating, the opening and closing of the first valve body 301 and the second valve body 302 are all optional embodiments of the present application.

[0055] Optionally, the first chamber 203 defines a first inlet and outlet 2031 , and the fourth chamber 206 defines a second inlet and outlet 2061 .

[0056] In the embodiment of the present disclosure, when the heat exchanger is used as a condenser, the refrigerant flows into the first chamber 203 from the first inlet and outlet 2031, then flows out of the first chamber 203, flows through the above-mentioned route, and then flows out from the second inlet and outlet 2061 of the fourth chamber 206. When the heat exchanger is used as an evaporator, the refrigerant flows into the fourth chamber 206 from the second inlet and outlet 2061, flows through the above-mentioned route, and then flows out from the first inlet and outlet 2031.

[0057] Optionally, the first inlet and outlet 2031 is used for the entry and exit of gaseous refrigerant, and the second inlet and outlet 2061 is used for the entry and exit of refrigerant containing liquid refrigerant.

[0058] In the embodiment of the present disclosure, the first inlet and outlet 2031 is used for the entry and exit of gaseous refrigerant, and the second inlet and outlet 2061 is used for the entry and exit of refrigerant containing liquid refrigerant. It can be understood that the first header is a gas header, and the second header is a liquid header, wherein the second inlet and outlet can be pure liquid refrigerant or gas-liquid two-phase refrigerant. When used as a condenser, high-temperature and high-pressure gaseous refrigerant flows into the heat exchanger from the first inlet and outlet 2031. After condensation in the heat exchanger, at least part of the gaseous refrigerant becomes liquid refrigerant, and then flows out from the second inlet and outlet 2016 of the second header. When used as an evaporator, liquid refrigerant flows into the second header from the second inlet and outlet 2016. After evaporation in the heat exchanger, at least part of the liquid refrigerant becomes gaseous refrigerant and flows out from the first inlet and outlet 2031 of the first header.

[0059] Alternatively, if Figure 4 and Figure 5 As shown, the heat exchange tube group 10 of a heat exchanger unit 50 includes a fourth heat exchange tube 104 , one end of the fourth heat exchange tube 104 is connected to the first chamber 203 , and the other end of the fourth tube is connected to the third chamber 205 .

[0060] In the embodiment of the present disclosure, the heat exchange tube group 10 of a heat exchange unit 50 can further increase heat exchange tubes. When the fourth heat exchange tube 104 is increased, the fourth heat exchange tube 104 is connected to the first chamber 203 and the third chamber 205. In this way, when the heat exchanger is used as a condenser, Figure 4 As shown, the refrigerant flows into the first chamber 203 from the first inlet and outlet 2031, and then flows into the first heat exchange tube 101 and the fourth heat exchange tube 104 from the first chamber 203, and then flows into the third chamber 205 from the first heat exchange tube 101 and the fourth heat exchange tube 104. The refrigerant flowing into the third chamber 205 flows into the second chamber 204 along the second heat exchange tube 102, and then flows into the third heat exchange tube 103 from the second chamber 204 and then into the fourth chamber 206, and finally flows out from the second inlet and outlet 2061 of the fourth chamber 206. When the heat exchanger is used as an evaporator, as shown in FIG. Figure 5 As shown, the refrigerant flows into the fourth chamber 206 from the second inlet and outlet 2061, and then flows into the third chamber 205 and the third heat exchange tube 103 from the fourth chamber 206 respectively. The refrigerant flowing into the third heat exchange tube 103 flows into the second chamber 204, and then flows into the first chamber 203. The refrigerant flowing into the third chamber 205 flows into the first heat exchange tube 101, the second heat exchange tube 102 and the fourth heat exchange tube 104 respectively. The refrigerant in the second heat exchange tube 102 flows into the second chamber 204. The refrigerant in the first heat exchange tube 101 and the fourth heat exchange tube 104 flows into the first chamber 203. Finally, the refrigerants of the four heat exchange tubes are mixed in the first chamber 203 and flow out from the first inlet and outlet 2031.

[0061] In the disclosed embodiment, by adding the fourth heat exchange tube 104, the versatility of the material can be increased, the uniformity of the refrigerant flow distribution in the heat exchanger can be improved, the pressure loss of the heat exchange tube and the header 20 can be reduced, and the versatility of the heat exchanger can be improved.

[0062] Optionally, the number of heat exchange tubes in the heat exchange tube group of a heat exchanger unit may be greater than 4. In actual applications, the number of heat exchange tubes can be set according to usage requirements.

[0063] Optionally, the heat exchange tube group of a heat exchanger unit 50 further includes fins 105, the number of fins 105 is multiple, the multiple fins 105 are arranged side by side, and the multiple heat exchange tubes of the heat exchange tube group 10 pass through the multiple fins 105. In the embodiment of the present disclosure, the fins 105 support and fix the heat exchange tubes, and can improve the heat exchange effect of the heat exchange tubes and improve the heat exchange efficiency of the heat exchanger.

[0064] Alternatively, if Figures 6 to 8 As shown, the valve body portion 30 separates the manifold 20 into a first manifold cavity 207 and a second manifold cavity 208, the valve body portion 30 includes a valve seat 303 and a valve shell 305, the valve seat 303 is located in the manifold 20, the valve seat 303 is configured with a connecting hole 304, and the connecting hole 304 can connect the first manifold cavity 207 and the second manifold cavity 208; the valve shell 305 is located on the side of the valve seat 303 facing the first manifold cavity 207, and is movably located at the connecting hole 304, the maximum cross-sectional area of ​​the valve seat 303 is greater than the cross-sectional area of ​​the connecting hole 304, and is used to open or close the connecting hole 304, wherein the valve body portion 30 includes a first valve body portion 301 and / or a second valve body portion 302, the first manifold cavity 207 includes a first chamber 203 and / or a third chamber 205, and the second manifold cavity 208 includes a second chamber 204 and / or a fourth chamber 206.

[0065] In the embodiment of the present disclosure, the valve seat 303 of the valve body 30 is located in the manifold 20, and the valve seat 303 is connected to the side wall of the manifold 20, so that the valve seat 303 isolates the manifold 20 from the first manifold cavity 207 and the second manifold cavity 208, and the valve seat 303 is provided with a connecting hole 304, and the valve shell 305 is movably arranged at the connecting hole 304, and the valve shell 305 is located on the side of the valve seat 303 facing the first manifold cavity 207, so that when the refrigerant flows from the first manifold cavity 207 to the second manifold cavity 208, the valve shell 305 moves to and blocks the connecting hole 304, that is, when the refrigerant flows from the first manifold cavity 207 to the second manifold cavity 208, the valve body is closed. When the refrigerant flows from the second manifold chamber 208 to the first manifold chamber 207, the refrigerant pushes the valve housing 305 to move the valve housing 305 in a direction away from the valve seat 303, thereby causing the valve housing 305 to open the communication hole 304, that is, when the refrigerant flows from the second manifold chamber 208 to the first manifold chamber 207, the valve body portion is connected. In this way, the one-way connection of the valve body portion 30 is achieved.

[0066] The valve body 30 includes a first valve body 301 and / or a second valve body 302, the first manifold cavity 207 includes a first chamber 203 and / or a third chamber 205, and the second manifold cavity 208 includes a second chamber 204 and / or a fourth chamber 206. It can be understood that at least one of the first valve body 301 and the second valve body 302 is the valve body 30 of the above structure.

[0067] Optionally, the wall surface of the valve housing facing the communicating hole matches the wall surface of the communicating hole, so that when the valve housing closes the communicating hole, the valve housing can be in close contact with the side wall of the communicating hole to achieve sealing. Optionally, one end of the valve housing 305 facing the valve seat 303 is a conical surface, and when the valve housing 305 closes the communicating hole 304, the conical surface of the valve housing 305 fits with the side wall of the communicating hole 304, so that the connection between the valve housing 305 and the communicating hole 304 can be sealed to prevent refrigerant leakage.

[0068] Optionally, when the valve body 30 is a one-way valve, the valve body 30 also includes a valve core 306 and a guide rail 307, the valve core 306 is connected to the valve shell 305; the guide rail 307 is connected to the manifold 20, and the guide rail 307 is fixedly arranged on the side of the connecting hole 304 facing the first manifold cavity, and extends along the axial direction of the manifold 20, and the valve core 306 is movably arranged on the guide rail 307; wherein, when the valve core 306 moves along the guide rail in a direction close to the connecting hole 304, the valve shell 305 abuts against the valve seat 303 to close the connecting hole 304, and when the valve core 306 moves along the guide rail in a direction away from the connecting hole 304, the valve shell 305 separates from the valve seat 303 to open the connecting hole 304.

[0069] In the disclosed embodiment, the valve core 306 is connected to the valve housing 305, and the valve core 306 can drive the valve housing 305 to move. The guide rail 307 is fixed on one side of the connecting hole 304, and the valve core 306 can move along the guide rail 307, that is, the guide rail 307 guides the movement of the valve housing 305. When the refrigerant flows from the first manifold cavity 207 to the second manifold cavity 208, the refrigerant exerts force on the valve core 306, so that the valve core 306 and the valve housing 305 move along the guide rail 307 toward the direction close to the valve seat 303, thereby making the valve housing 305 abut against the valve seat 303 and closing the connecting hole 304. Figure 7 As shown, when the refrigerant flows from the second manifold chamber 208 to the first manifold chamber 207, the refrigerant exerts force on the valve shell 305 and the valve core 306 to move the valve core 306 away from the valve seat 303, so that the valve shell 305 is separated from the valve seat 303, and then the connecting hole 304 is opened to realize the one-way conduction of the valve body 30. Figure 7 The middle arrow represents the flow direction of the refrigerant when the valve body is turned on. In addition, the guide rail 307 can also limit the left and right movement of the valve housing 305 to prevent the valve housing 305 from hitting the header 20 to produce a knocking sound.

[0070] Optionally, the valve core 306 is located at the center of the valve housing 305 , and the guide rail 307 is arranged corresponding to the valve core 306 , so that the movement of the valve housing 305 is more stable and the valve housing 305 is prevented from being offset.

[0071] Optionally, the valve body 30 further includes a fixing seat 308 , which is connected to the manifold 20 , located on a side of the guide rail 307 away from the valve seat 303 , and connected to the guide rail 307 for fixing the guide rail 307 .

[0072] In the disclosed embodiment, the fixing seat 308 is connected to the manifold 20 , so that the fixing seat 308 can fix the guide rail 307 to keep the guide rail 307 fixed, so as to facilitate the movement of the valve core 306 along the guide rail 307 .

[0073] Alternatively, if Figure 8 As shown, the fixed seat 308 includes a plurality of cantilevers 309, the inner ends of the plurality of cantilevers 309 are connected, the outer ends of the cantilevers 309 are connected to the side walls of the manifold, and the plurality of cantilevers 309 are arranged at intervals along the circumference of the manifold 20, so that the fixed seat 308 can be fixed, and the plurality of cantilevers 309 are arranged at intervals, and the fixed seat will not block the flow of the refrigerant.

[0074] Optionally, the first manifold chamber 207 is located above the second manifold chamber 208, the valve housing 305 is located above the valve seat 303, the guide rail 307 extends in the up-down direction, and the fixed seat 308 is located above the valve housing 305. In this way, when the refrigerant flows from the first manifold chamber 207 to the second manifold chamber 208, the valve housing 305 will naturally close the connecting hole 304 under its own gravity, and the pressure applied by the refrigerant will increase the reverse sealing performance. When the refrigerant flows from the second manifold chamber 208 to the first manifold chamber 207, the upward impact force of the refrigerant is greater than the gravity of the valve housing 305, and the valve housing 305 will be lifted up and opened, thereby realizing the normal flow of the refrigerant.

[0075] Optionally, the first valve body and the second valve body may be the same or different. That is, the first valve body and the second valve body may adopt the valve body of the above embodiment, or may adopt other forms of valve body, and any embodiment that can realize the chamber division of the manifold, unidirectional conduction, and variable flow diversion in the embodiment of the present disclosure belongs to the optional embodiment of the present application.

[0076] Optionally, a heat exchange unit further includes a shunt pipe, which is connected between the header 20 and the heat exchange tubes and is used to shunt the refrigerant in the header 20 to corresponding heat exchange tubes.

[0077] Alternatively, if Fig. 9 As shown, the heat exchanger includes a plurality of heat exchanger units 50, and the plurality of heat exchanger units 50 are detachably connected.

[0078] In the disclosed embodiment, the heat exchanger includes a plurality of heat exchanger units 50, and the plurality of heat exchanger units 50 are detachably connected, so that the number of heat exchanger units 50 can be set according to usage requirements, thereby forming heat exchangers of different sizes, so that the heat exchanger can be modularized and the versatility of the heat exchanger can be improved.

[0079] Optionally, the plurality of heat exchanger units 50 may also be integrally connected or fixedly connected.

[0080] Optionally, the number of heat exchanger units 50 included in the heat exchanger may be one, two, three, four or more.

[0081] Optionally, the heat exchanger further comprises a gas collecting pipe 504 and a distributor 505, wherein the gas collecting pipe 504 is provided with a third inlet and outlet, and is connected to the first inlet and outlet 2031 of the plurality of heat exchanger units 50; one end of the distributor 505 is connected to the second inlet and outlet 2061 of the plurality of heat exchanger units 50, and the other end thereof is provided with a fourth inlet and outlet. The plurality of heat exchanger units 50 of the heat exchanger are arranged in parallel between the gas collecting pipe 504 and the distributor 505.

[0082] In the disclosed embodiment, the gas collecting pipe 504 is connected to the first inlet and outlet 2031 of the plurality of heat exchanger units 50, so that the refrigerant flowing in from the third inlet and outlet can first flow into the gas collecting pipe 504, and then flow into the corresponding first collecting pipe 201 from the gas collecting pipe 504. Alternatively, the refrigerant flowing out of the first inlet and outlet 2031 of the plurality of heat exchanger units 50 is collected in the gas collecting pipe 504, and then flows out from the third inlet and outlet. The second inlet and outlet 2061 of the plurality of heat exchanger units 50 is connected to the distributor 505, and the distributor 505 can distribute the refrigerant flowing in from the fourth inlet and outlet to the plurality of second inlet and outlet 2061, or collect the refrigerant in the second inlet and outlet 2061 and then flow out from the fourth inlet and outlet. Since the second collecting pipe is a liquid collecting pipe, the refrigerant flowing in and out of the second inlet and outlet is liquid refrigerant, and the distributor can distribute the liquid refrigerant flowing in and out of the plurality of heat exchange units more evenly, thereby improving the heat exchange uniformity of the heat exchanger.

[0083] For example, the plurality of heat exchanger units 50 include a first heat exchanger unit 501 , a second heat exchanger unit 502 and a third heat exchanger unit 503 , and the first heat exchanger unit 501 , the second heat exchanger unit 502 and the third heat exchanger unit 503 are arranged in parallel between the collecting pipe 504 and the distributor 505 .

[0084] Optionally, the side opening of the gas collecting pipe 504 is connected to the first inlet and outlet 2031 of the first collecting pipe 201 of the heat exchanger unit 50. Fig.10As shown, the first inlet and outlet 2031 of the first manifold 201 is provided with a first connecting pipe 506, and the gas collecting pipe 504 is bonded and connected to the first connecting pipe 506. The cross section of the gas collecting pipe 504 is the same as or similar to the cross section of the first connecting pipe 506, so as to facilitate the connection stability of the two components. For example, the gas collecting pipe 504 is designed as a D-type, and the first connecting pipe 506 is designed as a D-type, and the D-type is directly coated with special materials for high-temperature welding and other processes to realize the connection of the two components.

[0085] Optionally, the second inlet and outlet 2061 is provided with a second communicating pipe 507 , and the second communicating hole 304 is in communication with the distributor 505 .

[0086] An embodiment of the present disclosure further provides an air conditioner, which includes the heat exchanger according to any one of the above embodiments.

[0087] The air conditioner of the disclosed embodiment includes the heat exchanger of any one of the above embodiments, and thus has the beneficial effects of the heat exchanger of any one of the above embodiments, which will not be described in detail here.

[0088] By adopting the air conditioner provided by the embodiment of the present disclosure and applying the heat exchanger in the air conditioner, the production cost of the air conditioner can be reduced and the cooling and heating effects of the air conditioner can be improved.

[0089] For example, the indoor heat exchanger and the outdoor heat exchanger of the air conditioner can both adopt the heat exchanger of the above embodiment, thereby improving the heat exchange capacity of the indoor and outdoor sides of the air conditioner and improving the cooling and heating effects of the air conditioner.

[0090] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying 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, characterized in that: Including heat exchanger unit, a heat exchanger unit includes: A heat exchange tube group, comprising a heat exchange tube; There are multiple headers, including a first header and a second header, and the first header and the second header are respectively connected to two ends of the heat exchange tube group; A first valve body is located in the first header and divides the first header into a first chamber and a second chamber. Both the first chamber and the second chamber are connected to the heat exchange tube group. When the refrigerant flows from the second chamber to the first chamber, the first valve body is connected. The second valve body is located in the second header and divides the second header into a third chamber and a fourth chamber. The third chamber and the fourth chamber are both connected to the heat exchange tube group. When the refrigerant flows from the fourth chamber to the third chamber, the second valve body is connected. When the heat exchanger is used as a condenser, the refrigerant flows in from the first chamber, the first valve body and the second valve body are both closed, and the refrigerant flows through the first chamber, the third chamber, the second chamber and the fourth chamber in sequence through the heat exchange tube group and then flows out; When the heat exchanger is used as an evaporator, the refrigerant flows in from the fourth chamber, the first valve body and the second valve body are both connected, and the refrigerant flows from the fourth chamber through the third chamber and the second chamber respectively through the heat exchange tube group and then flows out from the first chamber.

2. The heat exchanger according to claim 1, characterized in that: The heat exchange tube group of a heat exchanger unit includes: A first heat exchange tube, one end of which is connected to the first chamber, and the other end of which is connected to the third chamber; A second heat exchange tube, one end of which is in communication with the second chamber, and the other end of which is in communication with the third chamber; One end of the third heat exchange tube is communicated with the second chamber, and the other end of the third heat exchange tube is communicated with the fourth chamber.

3. The heat exchanger according to claim 1, characterized in that: The first chamber is provided with a first inlet and outlet, and the first inlet and outlet are used for the gaseous refrigerant to enter and exit; The fourth chamber is provided with a second inlet and outlet, and the second inlet and outlet are used for the refrigerant containing liquid refrigerant to enter and exit.

4. The heat exchanger according to claim 1, characterized in that: The heat exchange tube group of a heat exchanger unit includes: One end of the fourth heat exchange tube is communicated with the first chamber, and the other end of the fourth heat exchange tube is communicated with the third chamber.

5. The heat exchanger according to claim 1, characterized in that: The heat exchanger includes a valve body portion, the valve body portion is located in the header, and the valve body portion includes: A valve seat is located in the manifold, and divides the manifold into a first manifold cavity and a second manifold cavity. The valve seat is provided with a communication hole, and the communication hole can connect the first manifold cavity and the second manifold cavity. The valve housing is located on the side of the valve seat facing the first manifold cavity and is movably located at the connecting hole. The maximum cross-sectional area of ​​the valve seat is larger than the cross-sectional area of ​​the connecting hole and is used to open or close the connecting hole; wherein the valve body portion includes a first valve body portion and / or a second valve body portion, the first manifold cavity includes a first chamber and / or a third chamber, and the second manifold cavity includes a second chamber and / or a fourth chamber.

6. The heat exchanger according to claim 5, characterized in that The valve body also includes: A valve core connected to a valve housing; A guide rail is fixedly arranged on a side of the communication hole facing the first manifold cavity and extends along the axial direction of the manifold, and the valve core is movably arranged on the guide rail; When the valve core moves along the guide rail toward the connecting hole, the valve housing abuts against the valve seat to close the connecting hole; when the valve core moves along the guide rail toward the direction away from the connecting hole, the valve housing separates from the valve seat to open the connecting hole.

7. The heat exchanger according to claim 6, characterized in that The valve body also includes: The fixed seat is connected with the header, located at the side of the guide rail away from the valve seat, and is connected with the guide rail for fixing the guide rail.

8. The heat exchanger according to any one of claims 1 to 7, characterized in that: The heat exchanger includes a plurality of heat exchanger units.

9. The heat exchanger according to claim 8, characterized in that Also includes: The gas collecting pipe is provided with a third inlet and outlet and is connected with the first inlets and outlets of the plurality of heat exchanger units; A distributor, one end of which is connected to the second inlet and outlet of the plurality of heat exchanger units, and the other end of which is provided with a fourth inlet and outlet; Wherein, a plurality of heat exchanger units are connected in parallel between the gas collecting pipe and the distributor.

10. An air conditioner, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.

Images