Variable module heat exchanger and air conditioning system

Abstract

This application relates to the field of air conditioning technology and discloses a variable module heat exchanger, including a first main inlet and a second main inlet and outlet. The variable module heat exchanger further includes: a first variable flow distribution module, including a first refrigerant inlet and outlet, a second refrigerant inlet and outlet, and a first heat exchange tube assembly disposed between the first and second refrigerant inlets and outlets; a second variable flow distribution module, including a third and fourth refrigerant inlet and outlet, and a second heat exchange tube assembly disposed between the third and fourth refrigerant inlets and outlets; and a bypass pipeline disposed between the first and second variable flow distribution modules, wherein the bypass pipeline is provided with a bypass valve body component. When the bypass valve body component is closed, the first and second variable flow distribution modules are connected in parallel; when the bypass valve body component is open, the first and second variable flow distribution modules are connected in series. This application also provides an air conditioning system.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, such as a variable module heat exchanger and an air conditioning system. Background Technology

[0002] An air conditioning system typically consists of a compressor, an outdoor heat exchanger, a throttling device, a four-way valve, and an indoor heat exchanger, forming a refrigerant circulation loop. The four-way valve changes the flow direction of the refrigerant within the loop, thereby achieving cooling and heating functions. The indoor and outdoor heat exchangers are crucial structural components of the air conditioning system, and their heat exchange capacity directly affects the system's cooling or heating capacity.

[0003] Existing variable flow heat exchangers can improve heat exchange capacity in both cooling and heating modes by changing the connection method between different heat exchange branches.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Existing variable flow heat exchangers can take into account the optimal flow path of refrigerant under full load conditions during both cooling and heating. However, the flow path of refrigerant is not optimal under low load conditions, which reduces the heat exchange capacity of the variable flow heat exchanger under low load conditions.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a variable module heat exchanger and an air conditioning system to address the problem that the refrigerant flow path of a variable split-flow heat exchanger is not optimal under low-load conditions, thereby reducing the heat exchange capacity of the variable split-flow heat exchanger under low-load conditions.

[0009] In some embodiments, the variable module heat exchanger includes a first main inlet and a second main inlet and outlet. The variable module heat exchanger further includes: a first variable flow divider module, including a first refrigerant inlet and outlet, a second refrigerant inlet and outlet, and a first heat exchange tube assembly disposed between the first and second refrigerant inlets and outlets; a second variable flow divider module, including a third and fourth refrigerant inlet and outlet, and a second heat exchange tube assembly disposed between the third and fourth refrigerant inlets and outlets; and a bypass pipeline disposed between the first and second variable flow divider modules, wherein the bypass pipeline is provided with a bypass valve body component. When the bypass valve body component is closed, the first and second variable flow divider modules are connected in parallel; when the bypass valve body component is open, the first and second variable flow divider modules are connected in series.

[0010] In some optional embodiments, the first variable diversion module further includes a first tracheal branch and a first liquid branch. The first tracheal branch is connected between the first main inlet / outlet and the first refrigerant inlet / outlet, and the first liquid branch is connected between the second main inlet / outlet and the second refrigerant inlet / outlet. The second variable diversion module further includes a second tracheal branch and a second liquid branch. The second tracheal branch is connected between the first main inlet / outlet and the third refrigerant inlet / outlet, and the second liquid branch is connected between the second main inlet / outlet and the fourth refrigerant inlet / outlet. A bypass line is connected between the first liquid branch and the second tracheal branch.

[0011] In some alternative embodiments, the bypass line includes a first bypass end connected to the second gas branch pipe and a second bypass end connected to the first liquid branch pipe, wherein the first liquid branch pipe is provided with a first valve body component, the second gas branch pipe is provided with a second valve body component, and the first bypass end is connected between the second valve body component and the third refrigerant inlet and outlet, and the second bypass end is connected between the first valve body component and the second refrigerant inlet and outlet.

[0012] In some alternative embodiments, the variable module heat exchanger further includes a third valve body component disposed on the second liquid pipe branch.

[0013] In some alternative embodiments, the first variable flow splitter module is disposed above the second variable flow splitter module, wherein, in the vertical direction, the second bypass end is disposed between the second refrigerant inlet / outlet and the third refrigerant inlet / outlet.

[0014] In some alternative embodiments, a first refrigerant pipe section is formed between the second refrigerant inlet / outlet and the first valve body component, and a second refrigerant pipe section is formed between the second refrigerant inlet / outlet and the bypass valve body component, wherein the length of the first refrigerant pipe section is L1, the length of the second refrigerant pipe section is L2, and L1≥L2.

[0015] In some alternative embodiments, the bypass line includes a first bypass section, a second bypass section, and a third bypass section that are bent and connected in sequence. The first bypass section is close to the first bypass end, and the third bypass section is close to the second bypass end. The angle between the first bypass section and the second bypass section is a1, and the angle between the first bypass section and the second tracheal bronchus is a2. Furthermore, 45° < a1 ≤ 80°; 100° < a2 ≤ 135°.

[0016] In some alternative embodiments, the bypass line is also provided with a filter element.

[0017] In some alternative embodiments, a third refrigerant pipe section is formed between the third refrigerant inlet / outlet and the second valve body component, and a fourth refrigerant pipe section is formed between the third refrigerant inlet / outlet and the filter element, wherein the length of the third refrigerant pipe section is L3, the length of the fourth refrigerant pipe section is L4, and L3 ≥ L4.

[0018] In some optional embodiments, the first variable flow distribution module further includes a first manifold assembly and a first flow path switching component disposed on the first manifold assembly, wherein the first flow path switching component is used to switch the connection mode of at least some heat exchange branches in the first heat exchange tube group under different operating modes; the second variable flow distribution module further includes a second manifold assembly and a second flow path switching component disposed on the second manifold assembly, wherein the second flow path switching component is used to switch the connection mode of at least some heat exchange branches in the second heat exchange tube group under different operating modes.

[0019] In some embodiments, the air conditioning system includes a variable module heat exchanger as described above.

[0020] The variable module heat exchanger and air conditioning system provided in this disclosure can achieve the following technical effects:

[0021] This disclosure provides a variable module heat exchanger, which includes a first main inlet and a second main inlet and outlet for refrigerant, and further includes a first variable flow divider module, a second variable flow divider module, and a bypass pipeline. The first variable flow divider module includes a first refrigerant inlet and outlet, a second refrigerant inlet and outlet, and a first heat exchange tube assembly disposed between the first and second refrigerant inlets and outlets. The second variable flow divider module includes a third refrigerant inlet and outlet, a fourth refrigerant inlet and outlet, and a second heat exchange tube assembly disposed between the third and fourth refrigerant inlets and outlets. The bypass pipeline is disposed between the first and second variable flow divider modules. The bypass pipeline includes a bypass valve body component. When the bypass valve body component is closed, the first and second variable flow divider modules are connected in parallel; when the bypass valve body component is open, the first and second variable flow divider modules are connected in series.

[0022] The variable module heat exchanger provided in this embodiment includes two variable flow distribution modules, and a bypass pipeline connects the two variable flow distribution modules. The bypass pipeline is equipped with a bypass valve body component that can be controlled to open and close. When the bypass valve body component is closed, the first variable flow distribution module and the second variable flow distribution module are connected in parallel; when the bypass valve body component is open, the first variable flow distribution module and the second variable flow distribution module are connected in series.

[0023] As can be seen, the variable module heat exchanger provided in this embodiment can adjust the connection mode between the first variable flow divider module and the second variable flow divider module by controlling the opening and closing of the bypass valve body component set in the bypass pipeline, thereby making the refrigerant flow path of the variable module heat exchanger conform to the low load operation condition and the high load operation condition, thus improving the heat exchange capacity of the variable module heat exchanger.

[0024] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0025] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0026] Figure 1 This is a schematic diagram of a variable module heat exchanger provided in an embodiment of this disclosure;

[0027] Figure 2 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure;

[0028] Figure 3 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure;

[0029] Figure 4 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure;

[0030] Figure 5 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure;

[0031] Figure 6 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure;

[0032] Figure 7 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure;

[0033] Figure 8 This is a schematic diagram of another variable module heat exchanger provided in an embodiment of this disclosure.

[0034] Figure label:

[0035] 101: First Total Import / Export; 102: Second Total Import / Export;

[0036] 200: First variable flow divider module; 201: First refrigerant inlet / outlet; 202: Second refrigerant inlet / outlet; 203: First valve body component; 210: First heat exchanger tube assembly; 220: First gas pipe branch; 230: First liquid pipe branch; 240: First gas pipe; 241: First gas pipe check valve; 250: First liquid pipe; 251: First liquid pipe check valve;

[0037] 300: Second variable flow divider module; 301: Third refrigerant inlet / outlet; 302: Fourth refrigerant inlet / outlet; 303: Second valve body component; 304: Third valve body component; 310: Second heat exchanger tube assembly; 320: Second gas pipe branch; 330: Second liquid pipe branch; 340: Second gas pipe; 341: Second gas pipe check valve; 350: Second liquid pipe; 351: Second liquid pipe check valve;

[0038] 400: Bypass line; 410: Bypass valve body component; 420: Filter element; 402: First bypass end; 403: Second bypass end;

[0039] 510: First refrigerant pipe section; 520: Second refrigerant pipe section; 530: Third refrigerant pipe section; 540: Fourth refrigerant pipe section. Detailed Implementation

[0040] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0041] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0043] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" 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, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0044] Unless otherwise stated, the term "multiple" means two or more.

[0045] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0046] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0048] This disclosure provides a variable module heat exchanger.

[0049] Optionally, the variable module heat exchanger includes a first main inlet / outlet 101 and a second main inlet / outlet 102. The variable module heat exchanger also includes a first variable flow divider module 200, a second variable flow divider module 300, and a bypass pipe 400. The first variable flow divider module 200 includes a first refrigerant inlet / outlet 201, a second refrigerant inlet / outlet 202, and a first heat exchange tube assembly 210 disposed between the first and second refrigerant inlet / outlet 201 and the second refrigerant inlet / outlet 202. The second variable flow divider module 300 includes a third refrigerant inlet / outlet 301, a fourth refrigerant inlet / outlet 302, and a second heat exchange tube assembly 310 disposed between the third and fourth refrigerant inlet / outlet 301 and the fourth refrigerant inlet / outlet 302. The bypass pipe 400 is disposed between the first and second variable flow divider modules 200 and 300. The bypass pipeline 400 is equipped with a bypass valve body component 410. When the bypass valve body component 410 is closed, the first variable flow divider module 200 and the second variable flow divider module 300 are connected in parallel. When the bypass valve body component 410 is open, the first variable flow divider module 200 and the second variable flow divider module 300 are connected in series.

[0050] The variable module heat exchanger is provided with a first main inlet / outlet 101 and a second main inlet / outlet 102 for refrigerant inflow and outflow. The variable module heat exchanger also includes a first variable flow divider module 200 and a second variable flow divider module 300. The first variable flow divider module 200 is provided with a first heat exchange tube group 210, which includes multiple heat exchange branches connected in a variable flow divider manner. Similarly, the second variable flow divider module 300 is provided with a second heat exchange tube group 310, which also includes multiple heat exchange branches connected in a variable flow divider manner.

[0051] The bypass pipeline 400 is located between the first variable flow divider module 200 and the second variable flow divider module 300, and the bypass pipeline 400 is provided with a bypass valve body component 410, which can be opened or closed in a controlled manner.

[0052] When the bypass valve body component 410 is closed, the first variable flow divider module 200 and the second variable flow divider module 300 are connected in parallel. At this time, the refrigerant flowing in from the first main inlet / outlet 101 flows into the first variable flow divider module 200 and the second variable flow divider module 300 respectively. Figure 5 As shown.

[0053] When the bypass valve body component 410 is opened, the first variable flow divider module 200 and the second variable flow divider module 300 are connected in series. At this time, the refrigerant flowing in from the first main inlet / outlet 101 first flows into the first variable flow divider module 200 for the first heat exchange. After the first heat exchange, the refrigerant flows into the second variable flow divider module 300 through the bypass pipe 400 for the second heat exchange. Figure 6 As shown.

[0054] As can be seen, the variable module heat exchanger provided in this embodiment can adjust the connection mode of the first variable flow divider module 200 and the second variable flow divider module 300 of the variable module heat exchanger according to the operating conditions of the air conditioning system by setting the bypass pipe 400, so that the refrigerant flow path of the variable module heat exchanger simultaneously meets the high load operating conditions and the low load operating conditions.

[0055] For example, when the air conditioning system is operating under high load, the refrigerant flow rate is large. At this time, the bypass valve body component 410 can be controlled to close, so that the first variable flow split module 200 and the second variable flow split module 300 are connected in parallel. When the air conditioning system is operating under low load conditions such as intermediate cooling or 25% cooling, the refrigerant flow rate is small. At this time, the bypass valve body component 410 can be controlled to open, so that the first variable flow split module 200 and the second variable flow split module 300 are connected in series. In this way, under low load cooling conditions, the number of flow paths can be further reduced to increase the refrigerant flow rate in the pipes, enhance heat exchange, and improve the heat exchange capacity of the variable module heat exchanger.

[0056] Optionally, the first variable flow divider module 200 further includes a first tracheal branch pipe 220 and a first liquid branch pipe 230. The first tracheal branch pipe 220 is connected between the first main inlet / outlet 101 and the first refrigerant inlet / outlet 201, and the first liquid branch pipe 230 is connected between the second main inlet / outlet 102 and the second refrigerant inlet / outlet 202. The second variable flow divider module 300 further includes a second tracheal branch pipe 320 and a second liquid branch pipe 330. The second tracheal branch pipe 320 is connected between the first main inlet / outlet 101 and the third refrigerant inlet / outlet 301, and the second liquid branch pipe 330 is connected between the second main inlet / outlet 102 and the fourth refrigerant inlet / outlet 302. The bypass pipe 400 is connected between the first liquid branch pipe 230 and the second tracheal branch pipe 320.

[0057] The first refrigerant inlet / outlet 201 and the second refrigerant inlet / outlet 202 are the two refrigerant ports of the first variable flow distribution module 200. The first refrigerant inlet / outlet 201 is connected to the first main inlet / outlet 101 via the first gas branch pipe 220, and the second refrigerant inlet / outlet 202 is connected to the second main inlet / outlet 102 via the first liquid branch pipe 230. The third refrigerant inlet / outlet 301 and the fourth refrigerant inlet / outlet 302 are the two refrigerant ports of the second variable flow distribution module 300. The third refrigerant inlet / outlet 301 is connected to the first main inlet / outlet 101 via the second gas branch pipe 320, and the fourth refrigerant inlet / outlet 302 is connected to the second main inlet / outlet 102 via the second liquid branch pipe 330. A bypass pipe 400 connects the first liquid branch pipe 230 and the second gas branch pipe 320.

[0058] In this way, when the bypass pipe 400 needs to be connected, the refrigerant flowing out of the first liquid pipe branch pipe 230 after the first variable flow splitting module 200 has undergone the first heat exchange flows to the second gas pipe branch pipe 320, and undergoes the second heat exchange in the second variable flow splitting module 300, thereby realizing the series connection between the first variable flow splitting module 200 and the second variable flow splitting module 300.

[0059] Optionally, the bypass pipe 400 includes a first bypass end 402 connected to the second gas branch pipe 320 and a second bypass end 403 connected to the first liquid branch pipe 230. The first liquid branch pipe 230 is provided with a first valve body component 203, the second gas branch pipe 320 is provided with a second valve body component 303, and the first bypass end 402 connects the second valve body component 303 to the third refrigerant inlet / outlet 301, while the second bypass end 403 connects the first valve body component 203 to the second refrigerant inlet / outlet 202.

[0060] The two ends of the bypass pipe 400 are a first bypass end 402 and a second bypass end 403, respectively. The first bypass end 402 is located between the second valve body component 303 of the second gas branch pipe 320 and the third refrigerant inlet / outlet 301, and the second bypass end 403 is located between the first valve body component 203 of the first liquid branch pipe 230 and the second refrigerant inlet / outlet 202. Figure 2 As shown.

[0061] In this way, when the bypass pipeline 400 needs to be opened, the first valve body component 203 and the second valve body component 303 are closed, and the bypass valve body component 410 is opened, thus realizing the series connection between the first variable flow divider module 200 and the second variable flow divider module 300.

[0062] Optionally, the first valve body component 203, the second valve body component 303, or the bypass valve body component 410 are solenoid valves.

[0063] Optionally, the variable module heat exchanger further includes a third valve body component 304. The third valve body component 304 is disposed on the second liquid pipe branch 330. Optionally, the third valve body component 304 is a solenoid valve.

[0064] When only the first variable flow divider module 200 is needed for heat exchange, the first valve body component 203 located in the first liquid pipe branch 230 can be opened; the second valve body component 303 located in the second gas pipe branch 320 and the third valve body component 304 located in the second liquid pipe branch 330 can be closed; simultaneously, the bypass valve body component 410 can be closed. In this way, only the first variable flow divider module 200 can be used for heat exchange.

[0065] Optionally, the variable module heat exchanger further includes a first fan and a second fan. The first fan is positioned at the same height as the first variable flow distribution module 200 for heat exchange between the first variable flow distribution module 200 and the air; the second fan is positioned at the same height as the second variable flow distribution module 300 for heat exchange between the second variable flow distribution module 300 and the air. When only heat exchange is required by the first variable flow distribution module 200, the first fan can be turned on and the second fan can be turned off.

[0066] Optionally, the first variable flow divider module 200 is disposed above the second variable flow divider module 300, wherein, in the vertical direction, the second bypass end 403 is disposed between the second refrigerant inlet / outlet 202 and the third refrigerant inlet / outlet 301. Figure 2 As shown.

[0067] The first variable flow divider module 200 and the second variable flow divider module 300 are arranged vertically, with the first variable flow divider module 200 positioned above the second variable flow divider module 300. Vertically, the second bypass end 403 of the bypass pipe 400 is located between the second refrigerant inlet / outlet 202 and the third refrigerant inlet / outlet 301. This can be understood as follows: the second refrigerant inlet / outlet 202 is located at a first height, the third refrigerant inlet / outlet 301 is located at a second height, and the second bypass end 403 is located between the first and second heights. This facilitates the flow of refrigerant from the second refrigerant inlet / outlet 202 into the second variable flow divider module 300 via the bypass pipe 400.

[0068] Optionally, a first refrigerant pipe section 510 is formed between the second refrigerant inlet / outlet 202 and the first valve body component 203, and a second refrigerant pipe section 520 is formed between the second refrigerant inlet / outlet 202 and the bypass valve body component 410, wherein the length of the first refrigerant pipe section 510 is L1, the length of the second refrigerant pipe section 520 is L2, and L1 ≥ L2. Figure 3 and Figure 4 As shown.

[0069] The refrigerant pipe section between the second refrigerant inlet / outlet 202 and the first valve body component 203 is defined as the first refrigerant pipe section 510, and the refrigerant pipe section between the second refrigerant inlet / outlet 202 and the bypass valve body component 410 is defined as the second refrigerant pipe section 520. In this embodiment, the length L1 of the first refrigerant pipe section 510 is greater than or equal to the length L2 of the second refrigerant pipe section 520. This can be understood as the bypass valve body component 410 being located at the end of the bypass pipe 400 near the second refrigerant inlet / outlet 202. Thus, when the first variable flow divider module 200 and the second variable flow divider module 300 are connected in parallel, the bypass valve body component 410 is controlled to close, and excessive refrigerant is prevented from remaining in the bypass pipe 400.

[0070] Optionally, the bypass pipe 400 includes a first bypass section, a second bypass section, and a third bypass section that are bent and connected in sequence. The first bypass section is close to the first bypass end 402, and the third bypass section is close to the second bypass end 403. The angle between the first bypass section and the second bypass section is a1, and the angle between the first bypass section and the second tracheal branch 320 is a2. Furthermore, 45° < a1 ≤ 80°; 100° < a2 ≤ 135°.

[0071] In this embodiment, the angle α2 between the first bypass section near the first bypass end 402 and the second tracheal branch pipe 320 is greater than 100° and less than or equal to 135°, and the angle α1 between the first bypass section and the second bypass section is greater than 45° and less than or equal to 80°. Thus, when the second valve body component 303 of the second tracheal branch pipe 320 is open, the refrigerant in the second tracheal branch pipe 320 will preferentially enter the third refrigerant inlet / outlet 301 and undergo heat exchange within the second variable flow divider module 300.

[0072] Optionally, the second bypass segment is a horizontal segment, and similarly, the second tracheal bronchus 320 is a horizontal segment. Optionally, the total angle between a1 and a2 is 180°.

[0073] Optionally, the bypass line 400 is also provided with a filter element 420.

[0074] The filter element 420, disposed inside the bypass pipe 400, improves the mixing degree of gaseous and liquid refrigerant within the bypass pipe 400. Optionally, the filter element 420 includes a filter screen.

[0075] Optionally, a third refrigerant pipe section 530 is formed between the third refrigerant inlet / outlet 301 and the second valve body component 303, and a fourth refrigerant pipe section 540 is formed between the third refrigerant inlet / outlet 301 and the filter element 420. The length of the third refrigerant pipe section 530 is L3, the length of the fourth refrigerant pipe section 540 is L4, and L3 ≥ L4.

[0076] The filter element 420 is disposed near the first bypass end 402. In this embodiment, the length L3 of the third refrigerant pipe section 530 is greater than or equal to the length of the fourth refrigerant pipe section 540. This allows the filter element 420 to be disposed closer to the third refrigerant inlet / outlet 301, thereby improving the mixing degree of gaseous and liquid refrigerant flowing into the third refrigerant inlet / outlet 301.

[0077] Optionally, the first variable flow splitting module 200 further includes a first manifold assembly and a first flow path switching component disposed on the first manifold assembly, wherein the first flow path switching component is used to switch the connection mode of at least some heat exchange branches in the first heat exchange tube group 210 under different operating modes.

[0078] The first manifold assembly includes a first gas pipe 240 and a first liquid pipe 250. The first gas pipe 240 has a first refrigerant inlet and outlet 201, a first gas pipe branch pipe 220 connected to the first gas pipe 240, and the first gas pipe 240 is equipped with a first gas pipe check valve 241; the first liquid pipe 250 has a second refrigerant inlet and outlet 202, a first liquid pipe branch pipe 230 connected to the first liquid pipe 250, and the first liquid pipe 250 is equipped with a first liquid pipe check valve 251.

[0079] When the first variable flow divider module 200 functions as an evaporator, the first gas pipe check valve 241 and the first liquid pipe check valve 251 are activated, and the heat exchange branches in the first heat exchange tube group 210 are connected in parallel, such as... Figure 8 As shown; when the first variable flow divider module 200 acts as a condenser, the first gas pipe check valve 241 and the first liquid pipe check valve 251 are closed, and the heat exchange branches in the first heat exchange tube group 210 are connected in series, as shown. Figure 7 As shown.

[0080] Optionally, the second variable flow splitting module 300 further includes a second manifold assembly and a second flow path switching component disposed on the second manifold assembly, wherein the second flow path switching component is used to switch the connection mode of at least some heat exchange branches in the second heat exchange tube group 310 under different operating modes.

[0081] The second manifold assembly includes a second gas pipe 340 and a second liquid pipe 350. The second gas pipe 340 has a third refrigerant inlet / outlet 301, a second gas pipe branch pipe 320 connected to the second gas pipe 340, and a second gas pipe one-way valve 341. The second liquid pipe 350 has a fourth refrigerant inlet / outlet 302, a second liquid pipe branch pipe 330 connected to the second liquid pipe 350, and a second liquid pipe one-way valve 351.

[0082] When the second variable flow split module 300 is used as an evaporator, the second gas pipe check valve 341 and the second liquid pipe check valve 351 are open, and the heat exchange branches in the second heat exchange tube group 310 are connected in parallel; when the second variable flow split module 300 is used as a condenser, the second gas pipe check valve 341 and the second liquid pipe check valve 351 are closed, and the heat exchange branches in the second heat exchange tube group 310 are connected in series.

[0083] This disclosure also provides an air conditioning system, including a variable module heat exchanger as described above.

[0084] The air conditioning system provided by the embodiments of this disclosure has the same effect as the variable module heat exchanger described above, and will not be repeated here.

[0085] The foregoing description and accompanying drawings fully illustrate 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. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. 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 its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A variable module heat exchanger, characterized in that, Including the first main inlet / outlet (101) and the second main inlet / outlet (102), the variable module heat exchanger also includes: The first variable flow splitting module (200) includes a first refrigerant inlet / outlet (201), a second refrigerant inlet / outlet (202), and a first heat exchange tube assembly (210) disposed between the first refrigerant inlet / outlet (201) and the second refrigerant inlet / outlet (202); The second variable flow splitter module (300) includes a third refrigerant inlet / outlet (301), a fourth refrigerant inlet / outlet (302), and a second heat exchange tube assembly (310) disposed between the third refrigerant inlet / outlet (301) and the fourth refrigerant inlet / outlet (302); and, A bypass pipe (400) is provided between the first variable flow divider module (200) and the second variable flow divider module (300). The bypass pipeline (400) is equipped with a bypass valve body component (410). When the bypass valve body component (410) is closed, the first variable flow divider module (200) and the second variable flow divider module (300) are connected in parallel. When the bypass valve body component (410) is open, the first variable flow divider module (200) and the second variable flow divider module (300) are connected in series.

2. The variable module heat exchanger according to claim 1, characterized in that, The first variable flow divider module (200) also includes a first vent branch pipe (220) and a first liquid branch pipe (230). The first vent branch pipe (220) is connected between the first main inlet / outlet (101) and the first refrigerant inlet / outlet (201), and the first liquid branch pipe (230) is connected between the second main inlet / outlet (102) and the second refrigerant inlet / outlet (202). The second variable flow divider module (300) also includes a second gas pipe branch (320) and a second liquid pipe branch (330). The second gas pipe branch (320) is connected between the first main inlet / outlet (101) and the third refrigerant inlet / outlet (301), and the second liquid pipe branch (330) is connected between the second main inlet / outlet (102) and the fourth refrigerant inlet / outlet (302). The bypass pipe (400) is connected between the first liquid pipe branch (230) and the second tracheal branch (320).

3. The variable module heat exchanger according to claim 2, characterized in that, The bypass line (400) includes a first bypass end (402) connected to the second tracheal branch (320), and a second bypass end (403) connected to the first liquid branch (230). The first liquid pipe branch (230) is provided with a first valve body component (203), the second gas pipe branch (320) is provided with a second valve body component (303), and the first bypass end (402) is connected between the second valve body component (303) and the third refrigerant inlet / outlet (301), and the second bypass end (403) is connected between the first valve body component (203) and the second refrigerant inlet / outlet (202).

4. The variable module heat exchanger according to claim 3, characterized in that, Also includes: The third valve body component (304) is disposed on the second liquid pipe branch (330).

5. The variable module heat exchanger according to claim 3, characterized in that, The first variable current splitter module (200) is disposed above the second variable current splitter module (300). In the vertical direction, the second bypass end (403) is located between the second refrigerant inlet / outlet (202) and the third refrigerant inlet / outlet (301).

6. The variable module heat exchanger according to claim 5, characterized in that, A first refrigerant pipe section (510) is formed between the second refrigerant inlet / outlet (202) and the first valve body component (203), and a second refrigerant pipe section (520) is formed between the second refrigerant inlet / outlet (202) and the bypass valve body component (410), wherein the length of the first refrigerant pipe section (510) is L1, the length of the second refrigerant pipe section (520) is L2, and L1 ≥ L2; and / or, The bypass pipe (400) includes a first bypass section, a second bypass section and a third bypass section that are bent and connected in sequence. The first bypass section is close to the first bypass end (402) and the third bypass section is close to the second bypass end (403). The angle between the first bypass section and the second bypass section is a1, and the angle between the first bypass section and the second tracheal branch (320) is a2. Furthermore, 45° < a1 ≤ 80° and 100° < a2 ≤ 135°.

7. The variable module heat exchanger according to claim 6, characterized in that, The bypass line (400) is also equipped with a filter element (420).

8. The variable module heat exchanger according to claim 7, characterized in that, A third refrigerant pipe section (530) is formed between the third refrigerant inlet / outlet (301) and the second valve body component (303), and a fourth refrigerant pipe section (540) is formed between the third refrigerant inlet / outlet (301) and the filter element (420). The length of the third refrigerant pipe section (530) is L3, the length of the fourth refrigerant pipe section (540) is L4, and L3 ≥ L4.

9. The variable module heat exchanger according to any one of claims 1 to 8, characterized in that, The first variable flow splitting module (200) also includes a first manifold assembly and a first flow path switching component disposed on the first manifold assembly, wherein the first flow path switching component is used to switch the connection mode of at least some heat exchange branches in the first heat exchange tube group (210) under different operating modes. The second variable flow splitting module (300) also includes a second manifold assembly and a second flow path switching component disposed on the second manifold assembly, wherein the second flow path switching component is used to switch the connection mode of at least some heat exchange branches in the second heat exchange tube group (310) under different operating modes.

10. An air conditioning system, characterized in that, Includes the variable module heat exchanger as described in any one of claims 1 to 9.

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