Heat exchanger and air conditioning system

Abstract

The utility model relates to the technical field of air conditioners and discloses a heat exchanger and an air conditioning system. The heat exchanger comprises a first heat exchange module, and the first heat exchange module comprises a first heat exchange branch group which comprises a plurality of heat exchange branches; the first flow path switching assembly communicates with the multiple heat exchange branches of the first heat exchange branch set and is used for switching the communication modes of the multiple heat exchange branches of the first heat exchange branch set in different operation modes. The first liquid pipe structure is communicated with a plurality of heat exchange branches of the first heat exchange branch group; the liquid distribution element communicates with the first liquid pipe structure and is used for distributing refrigerants to the first liquid pipe structure. Wherein the first liquid pipe structure is provided with a first liquid separation communicating pipe communicated with the liquid separation element, the first liquid separation communicating pipe comprises a first liquid inlet pipe section connected with the first liquid pipe structure, and the first liquid inlet pipe section is arranged on the side wall of the first liquid pipe structure. According to the heat exchanger provided by the invention, the uniformity and the stability of the refrigerant distribution quantity among the heat exchange branches are improved.

Description

Technical Field

[0001] The present application relates to the field of air-conditioning technology, for example, to a heat exchanger and an air-conditioning system. Background Art

[0002] The heat exchanger is an important component of the air-conditioning system. It plays an important role when the air-conditioning system operates in cooling mode and heating mode. The heat exchange capacity of the heat exchanger directly affects the heating and cooling capacity of the air conditioner.

[0003] A variable split heat exchanger is a heat exchanger that can adjust the flow of refrigerant in the heat exchanger according to the operating mode of the air conditioning system. Taking the variable split heat exchanger as an outdoor heat exchanger as an example, when the air conditioning system operates in cooling mode, the variable split heat exchanger acts as a condenser, and its multiple heat exchange branches are connected in series. When the air conditioner operates in heating mode, the variable split heat exchanger acts as an evaporator, and its multiple heat exchange branches are connected in parallel.

[0004] 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:

[0005] When the existing variable split flow heat exchanger is used as an evaporator, multiple heat exchange branches of the heat exchanger are connected in parallel. However, the refrigerant distribution of each heat exchange branch is uneven, which reduces the heat exchange effect of the heat exchanger.

[0006] 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

[0007] 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.

[0008] The embodiments of the present disclosure provide a heat exchanger and an air conditioning system to improve the stability of the refrigerant flowing into a heat exchange module, thereby improving the heat exchange capacity of the heat exchanger.

[0009] The disclosed embodiment provides a heat exchanger, including a first heat exchange module, wherein the first heat exchange module includes: a first heat exchange branch group, including multiple heat exchange branches; a first flow path switching component, connected to the multiple heat exchange branches of the first heat exchange branch group, and used for switching the connection mode of the multiple heat exchange branches of the first heat exchange branch group under different operating modes; a first liquid pipe structure, connected to the multiple heat exchange branches of the first heat exchange branch group; a liquid separation element, connected to the first liquid pipe structure, and used for distributing refrigerant to the first liquid pipe structure, wherein the first liquid pipe structure is provided with a first liquid separation connecting pipe connected to the liquid separation element, the first liquid separation connecting pipe includes a first liquid inlet pipe section connected to the first liquid pipe structure, and the first liquid inlet pipe section is arranged on the side wall of the first liquid pipe structure.

[0010] In some optional embodiments, the angle between the first liquid inlet pipe section and the horizontal direction is a1, where a1≤30°.

[0011] In some optional embodiments, the first liquid-separating connecting pipe further includes a first liquid-separating pipe section connected to the liquid-separating element, wherein the first liquid-separating pipe section is connected to the first liquid-inlet pipe section in a bent manner.

[0012] In some optional embodiments, the angle between the first liquid dispensing pipe section and the vertical direction is a2, wherein a2≤30°.

[0013] In some optional embodiments, the first liquid pipe structure also includes a first branch pipe, which is connected to the first heat exchange branch of the first heat exchange branch group, and the first flow path switching assembly includes a first liquid pipe valve component connected to the first liquid pipe structure, and the first liquid pipe structure includes a first upper liquid pipe located on the liquid valve conduction outflow end side of the first liquid pipe valve component, and a first lower liquid pipe located on the liquid valve conduction inflow end side of the first liquid pipe valve component, wherein the first branch pipe is arranged on the first lower liquid pipe, and the first branch pipe is arranged on the opposite side of the first liquid inlet pipe section.

[0014] In some optional embodiments, the first heat exchange module also includes a first air pipe structure, the first flow path switching assembly includes a first air pipe valve component connected to the first air pipe structure, the first air pipe structure includes a first upper air pipe located on the side of the air valve conduction outflow end of the first air pipe valve component, and a first lower air pipe located on the side of the air valve conduction inflow end of the first air pipe valve component, the first heat exchange branch group also includes a second heat exchange branch, a third heat exchange branch and a fourth heat exchange branch, wherein one end of the third heat exchange branch and the fourth heat exchange branch are both connected to the first upper air pipe, and the other ends of the third heat exchange branch and the fourth heat exchange branch are connected to the first upper liquid pipe after converging through the first three-way valve, one end of the second heat exchange branch is connected to the first lower air pipe, and the other end is connected to the first upper liquid pipe, one end of the first heat exchange branch is connected to the first lower air pipe, and the other end is connected to the first lower liquid pipe.

[0015] In some optional embodiments, the first three-way valve includes a transversely arranged Y-type three-way structure, wherein the Y-type three-way structure includes a first three-way branch pipe connected to the fourth heat exchange branch, and a second three-way branch pipe connected to the third heat exchange branch, and the first three-way branch pipe is arranged on the upper part of the second three-way branch pipe.

[0016] In some optional embodiments, the heat exchanger also includes a second heat exchange module, wherein the second heat exchange module includes: a second heat exchange branch group, including multiple heat exchange branches; a second flow path switching component, connected to the multiple heat exchange branches of the second heat exchange branch group, and used to switch the connection mode of the multiple heat exchange branches of the second heat exchange branch group under different operating modes; a second liquid pipe structure, connected to the multiple heat exchange branches of the second heat exchange branch group, and the second liquid pipe structure is connected to the liquid separation element so that the liquid separation element distributes refrigerant to the second liquid pipe structure, wherein the second liquid pipe structure is provided with a second liquid separation connecting pipe connected to the liquid separation element, the second liquid separation connecting pipe includes a second liquid inlet pipe section connected to the second liquid pipe structure, and the second liquid inlet pipe section is arranged on the side wall of the second liquid pipe structure.

[0017] In some optional embodiments, the second heat exchange module is disposed at the lower portion of the first heat exchange module, wherein the second liquid inlet pipe section is provided with a first resistance pipe section for increasing the flow resistance of the refrigerant.

[0018] In some optional embodiments, the first resistance tube segment includes a bent tube segment or an inclined tube segment.

[0019] The disclosed embodiment also provides an air conditioning system, comprising the aforementioned heat exchanger.

[0020] The heat exchanger and air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] The heat exchanger provided by the embodiment of the present disclosure includes a first heat exchange module, the first heat exchange module includes a first heat exchange branch group and a first flow path switching component, and the first flow path switching component is used to switch the connection mode of multiple heat exchange branches in the first heat exchange branch group under different operation modes. The liquid separation element is connected to the first liquid pipe structure of the first heat exchange module, and is used to distribute refrigerant to the first liquid pipe structure. Among them, the first liquid inlet pipe section of the first liquid separation connecting pipe of the first liquid pipe structure is arranged on the side wall of the first liquid pipe structure.

[0022] The first liquid pipe structure of the heat exchanger is connected to multiple heat exchange branches of the first heat exchange branch group. When the heat exchanger is used as an evaporator, multiple heat exchange branches in the first heat exchange branch group are connected in parallel, and the first liquid pipe structure distributes refrigerant to multiple heat exchange branches connected in parallel. In the heat exchanger provided by the embodiment of the present disclosure, the first liquid inlet pipe section is arranged on the side wall of the first liquid pipe structure, so that the refrigerant flowing out of the liquid separation element flows from the side into the first liquid pipe structure. Compared with the form of liquid inlet from the bottom, the setting form of entering the first liquid pipe structure from the side improves the uniformity of refrigerant distribution in the first liquid pipe structure.

[0023] 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

[0024] 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:

[0025] Figure 1 is a structural schematic diagram of a heat exchanger provided in an embodiment of the present disclosure;

[0026] Figure 2 is a structural schematic diagram of a first heat exchange module provided in an embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram of refrigerant flow when a first heat exchange module provided by an embodiment of the present disclosure is used as a condenser;

[0028] Figure 4 is a schematic diagram of refrigerant flow when a first heat exchange module provided by an embodiment of the present disclosure is used as an evaporator;

[0029] Figure 5 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure;

[0030] Figure 6 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure;

[0031] Figure 7 is a structural schematic diagram of a first tracheal valve component provided by an embodiment of the present disclosure;

[0032] Figure 8 is a structural schematic diagram of another first tracheal valve component provided by an embodiment of the present disclosure;

[0033] Fig. 9 It is a schematic structural diagram of another first tracheal valve component provided in an embodiment of the present disclosure.

[0034] Reference numerals:

[0035] 1: gas collecting main pipe; 11: first distribution branch pipe or first distribution port; 12: second distribution branch pipe or second distribution port; 13: third distribution branch pipe or third distribution port;

[0036] 211: first upper air pipe; 212: first lower air pipe; 213: first air pipe valve component;

[0037] 221: first upper liquid pipe; 222: first lower liquid pipe; 223: first liquid pipe valve component; 224: first liquid inlet pipe section; 225: first liquid distribution pipe section;

[0038] 231: second upper air pipe; 232: second lower air pipe; 233: second air pipe valve component;

[0039] 241: second upper liquid pipe; 242: second lower liquid pipe; 243: second liquid pipe valve component; 244: second liquid inlet pipe section; 2441: first resistance pipe section; 245: second liquid distribution pipe section;

[0040] 300: first heat exchange branch group; 301: first heat exchange branch; 302: second heat exchange branch; 303: third heat exchange branch; 304: fourth heat exchange branch;

[0041] 311: first branch pipe; 321: first three-way branch pipe; 322: second three-way branch pipe;

[0042] 4: Liquid separation element;

[0043] 501: valve seat; 502: connecting hole; 503: valve housing; 504: valve core; 505: guide rail; 506: fixed seat; 507: cantilever. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 the specific circumstances.

[0048] Unless otherwise stated, the term "plurality" means two or more.

[0049] 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.

[0050] 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.

[0051] An embodiment of the present disclosure provides a heat exchanger.

[0052] The heat exchanger provided by the embodiment of the present disclosure includes a first heat exchange module, and the first heat exchange module includes a first heat exchange branch group 300 and a first flow path switching component. The first heat exchange branch group 300 includes a plurality of heat exchange branches; the first flow path switching component is connected to the plurality of heat exchange branches of the first heat exchange branch group 300, and is used to switch the connection mode of the plurality of heat exchange branches of the first heat exchange branch group 300 under different operation modes; the first liquid pipe structure is connected to the plurality of heat exchange branches of the first heat exchange branch group 300; the liquid separation element 4 is connected to the first liquid pipe structure, and is used to distribute refrigerant to the first liquid pipe structure. Among them, the first liquid pipe structure is provided with a first liquid separation connecting pipe connected to the liquid separation element 4, and the first liquid separation connecting pipe includes a first liquid inlet pipe section 224 connected to the first liquid pipe structure, and the first liquid inlet pipe section 224 is provided on the side wall of the first liquid pipe structure.

[0053] As mentioned above, when multiple heat exchange branches of the heat exchanger are connected in parallel, the amount of refrigerant distributed between different heat exchange branches is prone to uneven distribution. If the first liquid inlet pipe section 224 is set at the bottom of the first liquid pipe structure, the gas-liquid two-phase refrigerant entering from the bottom has multiple factors such as upward impulse, flow pressure, and gravity during the flow process, which makes the first liquid pipe structure unevenly distribute the refrigerant between different heat exchange branches, and even under the same operating load, the amount of refrigerant distributed to the same heat exchange branch twice is different.

[0054] In the heat exchanger provided in the embodiment of the present disclosure, the first liquid inlet pipe section 224 is arranged on the side of the first liquid pipe structure, so that the refrigerant distributed from the liquid separation element 4 can enter the first liquid pipe structure from the side, thereby improving the uniformity of the refrigerant distribution of the first liquid pipe structure to the heat exchange branch.

[0055] The first flow path switching component is used to switch the connection mode of different heat exchange branches in the first heat exchange branch group 300 under different operation modes. The first flow path switching component can form different connection modes between different heat exchange branches. In this way, the first flow path switching component enables the heat exchanger to have an optimal flow path under different operation modes, thereby improving the heat exchange efficiency of the heat exchanger.

[0056] Optionally, the first flow path switching component may be a valve component with a one-way conduction function, or a combination of a valve component with a one-way conduction function and a pipe component. For example, the first flow path switching component may be a combination of a manifold and a valve component, or a combination of a bypass pipe and a valve component, etc. Optionally, the valve component with a one-way conduction function includes a one-way valve, a solenoid valve, and a one-way conduction slider, a baffle, and other structural members that perform one-way conduction.

[0057] Optionally, the angle between the first liquid inlet pipe section 224 and the horizontal direction is a1, wherein a1≤30°.

[0058] Optionally, the first liquid inlet pipe section 224 may be arranged horizontally, such as Figure 1 As shown, the upward impact of the refrigerant flowing out of the liquid separation element 4 is broken. Optionally, the first liquid inlet pipe section 224 can also be slightly inclined, but the inclination angle should not be too large, and the angle a1 between the first liquid inlet pipe section 224 and the horizontal direction is ≤30°.

[0059] Optionally, the first liquid-separating connecting pipe further includes a first liquid-separating pipe section 225 connected to the liquid-separating element 4 , wherein the first liquid-separating pipe section 225 is connected to the first liquid-inlet pipe section 224 in a bent manner.

[0060] A bending connecting section is provided between the first liquid-distributing pipe section 225 and the first liquid-inlet pipe section 224. The first liquid-distributing pipe section 225 is substantially vertically arranged. The refrigerant flowing out of the liquid-distributing element 4 first flows vertically, then passes through the bending connecting section, and flows to the first liquid-distributing pipe section 225. Optionally, the first liquid-distributing pipe section 225 is integrally formed with the first liquid-inlet pipe section 224. Optionally, the angle between the first liquid-distributing pipe section 225 and the vertical direction is a2, wherein a2≤30°.

[0061] Optionally, the first liquid pipe structure further includes a first branch pipe 311, the first branch pipe 311 is connected to the first heat exchange branch 301 of the first heat exchange branch group 300, the first flow path switching assembly includes a first liquid pipe valve component 223 connected to the first liquid pipe structure, the first liquid pipe structure includes a first upper liquid pipe 221 located at the liquid valve conduction outflow end side of the first liquid pipe valve component 223, and a first lower liquid pipe 222 located at the liquid valve conduction inflow end side of the first liquid pipe valve component 223. The first branch pipe 311 is arranged on the first lower liquid pipe 222, and the first branch pipe 311 is arranged on the opposite side of the first liquid inlet pipe section 224.

[0062] The first branch pipe 311 directly connected to the first heat exchange branch 301 is arranged on the opposite side of the first liquid inlet pipe section 224, so that the refrigerant flowing out of the first liquid inlet pipe section 224 can be scattered and mixed in the first lower liquid pipe 222, thereby improving the stability of the refrigerant flowing into the first branch pipe 311. Optionally, the first branch pipe 311 is arranged at the upper part of the first liquid inlet pipe section 224, and the vertical spacing between the first branch pipe 311 and the first liquid inlet pipe section 224 is greater than or equal to 10 mm.

[0063] Optionally, the first heat exchange module further includes a first air pipe structure, the first flow path switching assembly includes a first air pipe valve component 213 connected to the first air pipe structure, the first air pipe structure includes a first upper air pipe 211 located on the air valve conduction outflow end side of the first air pipe valve component 213, and a first lower air pipe 212 located on the air valve conduction inflow end side of the first air pipe valve component 213, and the first heat exchange branch group 300 also includes a second heat exchange branch 302, a third heat exchange branch 303 and a fourth heat exchange branch 304. , wherein one end of the third heat exchange branch 303 and the fourth heat exchange branch 304 are both connected to the first upper air pipe 211, and the other ends of the third heat exchange branch 303 and the fourth heat exchange branch 304 are connected to the first upper liquid pipe 221 after converging through the first three-way valve, one end of the second heat exchange branch 302 is connected to the first lower air pipe 212, and the other end is connected to the first upper liquid pipe 221, and one end of the first heat exchange branch 301 is connected to the first lower air pipe 212, and the other end is connected to the first lower liquid pipe 222.

[0064] The first heat exchange branch group 300 includes a first heat exchange branch 301, a second heat exchange branch 302, a third heat exchange branch 303 and a fourth heat exchange branch 304. The first air pipe valve component 213 is a one-way conducting component, and its conducting direction is from the first lower air pipe 212 to the first upper air pipe 211. The first liquid pipe valve component 223 is also a one-way conducting component, and its conducting direction is from the first lower liquid pipe 222 to the first upper liquid pipe 221. In this way, the first heat exchange module is connected in a variable split manner.

[0065] When the first heat exchange module is used as an evaporator, the first liquid pipe valve component 223 and the first gas pipe valve component 213 are connected, and the first heat exchange branch 301, the second heat exchange branch 302, the third heat exchange branch 303 and the fourth heat exchange branch 304 are connected in parallel. Figure 4 As shown; when the first heat exchange module is used as a condenser, the first liquid pipe valve component 223 and the first gas pipe valve component 213 are closed, the fourth heat exchange branch 304 is connected in parallel with the third heat exchange branch 303, and then connected in series with the second heat exchange branch 302 and the first heat exchange branch 301 in sequence, as shown Figure 3 shown.

[0066] Optionally, the first three-way valve includes a transversely arranged Y-type three-way structure, wherein the Y-type three-way structure includes a first three-way branch pipe 321 connected to the fourth heat exchange branch 304, and a second three-way branch pipe 322 connected to the third heat exchange branch 303, and the first three-way branch pipe 321 is arranged on the upper part of the second three-way branch pipe 322.

[0067] In this way, when the refrigerant flows through the Y-shaped three-way structure, more refrigerant can flow into the second three-way branch pipe 322 under the action of gravity, and then be distributed to the third heat exchange branch 303 located at the bottom.

[0068] Optionally, the heat exchanger also includes a second heat exchange module, wherein the second heat exchange module includes a second heat exchange branch group and a second flow path switching component. The second heat exchange branch group includes a plurality of heat exchange branches; the second flow path switching component is connected to the plurality of heat exchange branches of the second heat exchange branch group, and is used to switch the connection mode of the plurality of heat exchange branches of the second heat exchange branch group under different operating modes; the second liquid pipe structure is connected to the plurality of heat exchange branches of the second heat exchange branch group, and the second liquid pipe structure is connected to the liquid separation element 4, so that the liquid separation element 4 distributes refrigerant to the second liquid pipe structure. The second liquid pipe structure is provided with a second liquid separation connecting pipe connected to the liquid separation element 4, and the second liquid separation connecting pipe includes a second liquid inlet pipe section 244 connected to the second liquid pipe structure, and the second liquid inlet pipe section 244 is provided on the side wall of the second liquid pipe structure.

[0069] Optionally, the structure of the second heat exchange module is completely the same as that of the first heat exchange module. In this way, the heat exchanger can be modularized in a standard manner, and different numbers of heat exchange modules can be matched according to the operating requirements of the air conditioning system.

[0070] Similarly, the second flow path switching assembly includes a second liquid pipe valve component 243 connected to the second liquid pipe structure, the second liquid pipe structure includes a second upper liquid pipe 241 located on the liquid valve conduction outflow side of the second liquid pipe valve component 243, and a second lower liquid pipe 242 located on the liquid valve conduction inflow side of the second liquid pipe valve component 243. The second flow path switching assembly includes a second air pipe valve component 233 connected to the second air pipe structure, the second air pipe structure includes a second upper air pipe 231 located on the air valve conduction outflow side of the second air pipe valve component 233, and a second lower air pipe 232 located on the air valve conduction inflow side of the second air pipe valve component 233. The second heat exchange branch group also includes four heat exchange branches. Under the setting of the second flow path switching assembly, the connection mode of each heat exchange branch in the second heat exchange branch group is the same as the connection mode of the heat exchange branch of the first heat exchange branch group 300, which will not be repeated here.

[0071] Optionally, the second heat exchange module is disposed at the lower part of the first heat exchange module, wherein the second liquid inlet pipe section 244 is provided with a first resistance pipe section 2441 for increasing the flow resistance of the refrigerant. Figure 5As shown. Relative to the first heat exchange module, the second heat exchange module is arranged at the lower part, and the amount of refrigerant distributed by the liquid separation element 4 is relatively large, and thus the amount of refrigerant distributed to the first heat exchange module located at the upper part is small. In the disclosed embodiment, the second liquid inlet pipe section 244 is provided with a first resistance pipe section 2441, which increases the flow resistance of the refrigerant flowing out of the liquid separation element 4 when entering the second heat exchange module, thereby allowing more refrigerant to be distributed to the first heat exchange module, thereby increasing the uniformity of the refrigerant distribution of the entire heat exchanger and improving the heat exchange effect of the heat exchanger. The first resistance pipe section 2441 includes a bent pipe section or an inclined pipe section. Furthermore, the resistance of the first resistance pipe section 2441 can be adjusted by increasing the number of bends of the bent pipe section, setting the inclination angle of the inclined pipe section, and the like.

[0072] The embodiment of the present disclosure further provides a structure of a first air pipe valve component 213. Optionally, the structures of the first liquid pipe valve component 223, the second air pipe valve component 233 and the second liquid pipe valve component 243 are the same as the structure of the first air pipe valve component 213.

[0073] The first air pipe valve component 213 includes a valve seat 501 and a valve shell 503. The valve seat 501 is located in the first air pipe structure. The valve seat 501 is constructed with a connecting hole 502, and the connecting hole 502 can connect the first upper air pipe 211 and the first lower air pipe 212; the valve shell 503 is located on the side of the valve seat 501 facing the first upper air pipe 211, and is movably located at the connecting hole 502. The maximum cross-sectional area of ​​the valve seat 501 is greater than the cross-sectional area of ​​the connecting hole 502, and is used to open or close the connecting hole 502.

[0074] In the embodiment of the present disclosure, the valve seat 501 of the first air pipe valve component 213 is located in the first air pipe structure, and the valve seat 501 is connected to the side wall of the first air pipe structure, so that the valve seat 501 isolates the first air pipe structure into the first upper air pipe 211 and the first lower air pipe 212, and the valve seat 501 is provided with a connecting hole 502, and the valve shell 503 is movably arranged at the connecting hole 502, and the valve shell 503 is located on the side of the valve seat 501 facing the first upper air pipe 211, so that when the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the valve shell 503 moves to and blocks the connecting hole 502, that is, when flowing from the first upper air pipe 211 to the first lower air pipe 212, the first air pipe valve component 213 is closed. When the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the refrigerant pushes the valve housing 503 to move the valve housing 503 in a direction away from the valve seat 501, thereby causing the valve housing 503 to open the connecting hole 502, that is, when the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the first air pipe valve component 213 is connected. In this way, the one-way connection of the first air pipe valve component 213 is achieved.

[0075] 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 503 facing the valve seat 501 is a conical surface, and when the valve housing 503 closes the communicating hole 502, the conical surface of the valve housing 503 fits with the side wall of the communicating hole 502, so that the connection between the valve housing 503 and the communicating hole 502 can be sealed to prevent refrigerant leakage.

[0076] Optionally, the first air pipe valve component 213 also includes a valve core 504 and a guide rail 505, the valve core 504 is connected to the valve shell 503; the guide rail 505 is connected to the first air pipe structure, and the guide rail 505 is fixedly arranged on the side of the connecting hole 502 facing the first upper air pipe 211, and extends along the axial direction of the first air pipe structure, and the valve core 504 is movably arranged on the guide rail 505; wherein, when the valve core 504 moves along the guide rail in a direction close to the connecting hole 502, the valve shell 503 abuts against the valve seat 501 to close the connecting hole 502, and when the valve core 504 moves along the guide rail in a direction away from the connecting hole 502, the valve shell 503 separates from the valve seat 501 to open the connecting hole 502.

[0077] In the disclosed embodiment, the valve core 504 is connected to the valve housing 503, the valve core 504 can drive the valve housing 503 to move, the guide rail 505 is fixed on one side of the connecting hole 502, and the valve core 504 can move along the guide rail 505, that is, the guide rail 505 guides the movement of the valve housing 503. When the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the refrigerant applies force to the valve core 504, so that the valve core 504 and the valve housing 503 move along the guide rail 505 toward the direction close to the valve seat 501, thereby making the valve housing 503 abut against the valve seat 501 and closing the connecting hole 502. Figure 8 As shown, when the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the refrigerant exerts force on the valve shell 503 and the valve core 504 to make the valve core 504 move away from the valve seat 501, so that the valve shell 503 is separated from the valve seat 501, and then the connecting hole 502 is opened to realize the one-way conduction of the first air pipe valve component 213. Figure 8 The middle arrow indicates the flow direction of the refrigerant when the first air pipe valve component 213 is turned on. In addition, the guide rail 505 can also limit the left and right movement of the valve housing 503 to prevent the valve housing 503 from hitting the first air pipe structure to produce a knocking sound.

[0078] Optionally, the valve core 504 is located at the center of the valve housing 503 , and the guide rail 505 is arranged corresponding to the valve core 504 , so that the movement of the valve housing 503 is more stable and the valve housing 503 is prevented from being offset.

[0079] Optionally, the first air pipe valve component 213 further includes a fixing seat 506 , which is connected to the first air pipe structure, located on a side of the guide rail 505 away from the valve seat 501 , and connected to the guide rail 505 for fixing the guide rail 505 .

[0080] In the disclosed embodiment, the fixing seat 506 is connected to the first air pipe structure, so that the fixing seat 506 can fix the guide rail 505 to keep the guide rail 505 fixed, so as to facilitate the movement of the valve core 504 along the guide rail 505.

[0081] Alternatively, if Fig. 9 As shown, the fixed seat 506 includes a plurality of cantilevers 507, the inner ends of the plurality of cantilevers 507 are connected, the outer ends of the cantilevers 507 are connected to the side walls of the collecting pipe, and the plurality of cantilevers 507 are arranged at intervals along the circumference of the first air pipe structure, so that the fixed seat 506 can be fixed, and the plurality of cantilevers 507 are arranged at intervals, and the fixed seat will not block the flow of the refrigerant.

[0082] Optionally, the first upper air pipe 211 is located above the first lower air pipe 212, the valve housing 503 is located above the valve seat 501, the guide rail 505 extends in the up-down direction, and the fixing seat 506 is located above the valve housing 503. In this way, when the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the valve housing 503 will naturally close the connecting hole 502 under its own gravity, and the pressure applied by the refrigerant will increase the reverse sealing performance. When the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the upward impact force of the refrigerant is greater than the gravity of the valve housing 503, and the valve housing 503 will be lifted up and opened, thereby realizing the normal flow of the refrigerant.

[0083] Optionally, the heat exchanger further includes a third heat exchange module, and the third heat exchange module is arranged below the second heat exchange module.

[0084] Optionally, the heat exchanger further includes a gas collecting main pipe 1, a first distribution branch pipe 11 connecting the gas collecting main pipe 1 and the first heat exchange module, a second distribution branch pipe 12 connecting the gas collecting main pipe 1 and the second heat exchange module, and a third distribution branch pipe 13 connecting the gas collecting main pipe 1 and the third heat exchange module. In this way, the refrigerant is distributed to the three heat exchange modules through the three distribution branches. Figure 5 shown.

[0085] Optionally, the gas collecting main pipe 1 can also distribute the refrigerant to the three heat exchange modules through the first distribution port 11, the second distribution port 12 and the third distribution port 13 respectively. Figure 6 shown.

[0086] The embodiment of the present disclosure also provides an air conditioning system, comprising the heat exchanger as described above.

[0087] Optionally, the air conditioning system provided by the embodiment of the present disclosure may be a larger commercial air conditioning system.

[0088] For household air conditioners, since the number of heat exchange tubes in the heat exchanger is small, it is relatively easy to achieve uniform flow distribution between each heat exchange branch. However, for large air conditioning systems with a large number of heat exchange tubes, when the existing variable flow distribution form is used to divide the heat exchange branches of the heat exchanger, the refrigerant distribution between the heat exchange branches is prone to uneven and unstable.

[0089] In the air-conditioning system provided by the embodiment of the present disclosure, a larger heat exchanger is divided into heat exchange modules, which improves the uniformity and stability of the refrigerant distribution between each heat exchange branch, thereby improving the heat exchange capacity of the heat exchanger and improving the cooling and heating capabilities of the air-conditioning system.

[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: The invention comprises a first heat exchange module, wherein the first heat exchange module comprises: A first heat exchange branch group, comprising a plurality of heat exchange branches; A first flow path switching component is connected to the multiple heat exchange branches of the first heat exchange branch group and is used to switch the connection mode of the multiple heat exchange branches of the first heat exchange branch group under different operation modes; a first liquid pipe structure, connected to a plurality of heat exchange branches of the first heat exchange branch group; The liquid distributing element is connected to the first liquid pipe structure and is used to distribute the refrigerant to the first liquid pipe structure. The first liquid pipe structure is provided with a first liquid separation connecting pipe connected with the liquid separation element, the first liquid separation connecting pipe includes a first liquid inlet pipe section connected with the first liquid pipe structure, and the first liquid inlet pipe section is arranged on the side wall of the first liquid pipe structure.

2. The heat exchanger according to claim 1, characterized in that: The included angle between the first liquid inlet pipe section and the horizontal direction is a1, wherein a1≤30°.

3. The heat exchanger according to claim 2, characterized in that: The first liquid separation connecting pipe also includes a first liquid separation pipe section connected to the liquid separation element. The first liquid-distributing pipe section is connected to the first liquid-inlet pipe section in a bent manner.

4. The heat exchanger according to claim 3, characterized in that: The included angle between the first liquid dispensing pipe section and the vertical direction is a2, wherein a2≤30°.

5. The heat exchanger according to claim 1, characterized in that: The first liquid pipe structure also includes a first branch pipe, the first branch pipe is connected to the first heat exchange branch of the first heat exchange branch group, the first flow path switching assembly includes a first liquid pipe valve component connected to the first liquid pipe structure, the first liquid pipe structure includes a first upper liquid pipe located at a liquid valve conduction outflow end side of the first liquid pipe valve component, and a first lower liquid pipe located at a liquid valve conduction inflow end side of the first liquid pipe valve component, Wherein, the first branch pipe is arranged on the first lower liquid pipe, and the first branch pipe is arranged on the opposite side of the first liquid inlet pipe section.

6. The heat exchanger according to claim 5, characterized in that The first heat exchange module also includes a first air pipe structure, the first flow path switching assembly includes a first air pipe valve component connected to the first air pipe structure, the first air pipe structure includes a first upper air pipe located at a side of an air valve conduction outflow end of the first air pipe valve component, and a first lower air pipe located at a side of an air valve conduction inflow end of the first air pipe valve component, The first heat exchange branch group also includes a second heat exchange branch, a third heat exchange branch and a fourth heat exchange branch. Among them, one end of the third heat exchange branch and the fourth heat exchange branch are both connected to the first upper air pipe, and the other ends of the third heat exchange branch and the fourth heat exchange branch are connected to the first upper liquid pipe after converging through the first three-way valve, one end of the second heat exchange branch is connected to the first lower air pipe, and the other end is connected to the first upper liquid pipe, one end of the first heat exchange branch is connected to the first lower air pipe, and the other end is connected to the first lower liquid pipe.

7. The heat exchanger according to claim 6, characterized in that The first three-way valve includes a Y-shaped three-way structure arranged horizontally, The Y-shaped three-way structure includes a first three-way branch pipe connected to the fourth heat exchange branch, and a second three-way branch pipe connected to the third heat exchange branch, and the first three-way branch pipe is arranged on the upper part of the second three-way branch pipe.

8. The heat exchanger according to any one of claims 1 to 7, characterized in that: Also includes a second heat exchange module, wherein the second heat exchange module includes: A second heat exchange branch group, including a plurality of heat exchange branches; A second flow path switching component is connected to the multiple heat exchange branches of the second heat exchange branch group and is used to switch the connection mode of the multiple heat exchange branches of the second heat exchange branch group under different operation modes; The second liquid pipe structure is connected to the plurality of heat exchange branches of the second heat exchange branch group, and the second liquid pipe structure is connected to the liquid separation element so that the liquid separation element distributes the refrigerant to the second liquid pipe structure. The second liquid pipe structure is provided with a second liquid separation connecting pipe connected with the liquid separation element, the second liquid separation connecting pipe includes a second liquid inlet pipe section connected with the second liquid pipe structure, and the second liquid inlet pipe section is arranged on the side wall of the second liquid pipe structure.

9. The heat exchanger according to claim 8, characterized in that The second heat exchange module is arranged at the lower part of the first heat exchange module. Wherein, the second liquid inlet pipe section is provided with a first resistance pipe section for increasing the flow resistance of the refrigerant.

10. The heat exchanger according to claim 9, characterized in that The first resistance pipe section includes a bent pipe section or an inclined pipe section.

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

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