Modular variable shunting heat exchanger, air conditioner outdoor unit and air conditioner system

Abstract

The utility model relates to the technical field of air conditioners, and discloses a modular variable flow dividing heat exchanger which comprises a first heat exchange module, a second heat exchange module and a liquid dividing element. The first heat exchange module comprises a first heat exchange pipe set and a first flow path switching assembly communicating with the first heat exchange pipe set, the first heat exchange pipe set comprises a plurality of heat exchange branches, and the first flow path switching assembly is used for switching the communicating modes of at least part of the heat exchange branches in the first heat exchange pipe set in different operation modes; the second heat exchange module comprises a second heat exchange pipe set and is arranged on the lower portion of the first heat exchange module. The liquid separation element comprises a first liquid separation branch communicating with the first heat exchange module and a second liquid separation branch communicating with the second heat exchange module. Wherein the first liquid separation branch is provided with a first throttling element, and the second liquid separation branch is provided with a second throttling element. The utility model further provides the air conditioner outdoor unit and an air conditioner system.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and for example, relates to a modular variable flow divider heat exchanger, an outdoor unit of an air conditioner, and an air conditioning system. Background Art

[0002] The heat exchanger disposed in the outdoor unit or indoor unit of an air conditioner is an important component of the air conditioning system, and the heat exchange capacity of the heat exchanger will affect the cooling capacity or heating capacity of the air conditioning system.

[0003] For a variable flow divider heat exchanger, the heat exchange tube group is divided into multiple heat exchange branches, and the connection mode of the multiple heat exchange branches is switched by a flow path switching component. For example, when the variable flow divider heat exchanger is used as a condenser, the flow path switching component connects the multiple heat exchange branches in series; when the variable flow divider heat exchanger is used as an evaporator, the flow path switching component connects the multiple heat exchange branches in parallel. In this way, the variable flow divider heat exchanger has good heat exchange capacity in both the cooling mode and the heating mode.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] The existing variable flow divider heat exchanger has low heat exchange capacity when used as an evaporator.

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

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preamble to the subsequent detailed description.

[0008] Embodiments of the present disclosure provide a modular variable flow divider heat exchanger, an outdoor unit of an air conditioner, and an air conditioning system to solve the problem of low heat exchange capacity of the variable flow divider heat exchanger when used as an evaporator.

[0009] In some embodiments, the modular variable flow split heat exchanger includes: a first heat exchange module, including a first heat exchange tube group and a first flow path switching component connected to the first heat exchange tube group. The first heat exchange tube group includes multiple heat exchange branches, and the first flow path switching component is configured to switch the connection mode of at least some of the heat exchange branches in the first heat exchange tube group in different operating modes; a second heat exchange module, including a second heat exchange tube group, and the second heat exchange module is disposed below the first heat exchange module; and a liquid distribution element, including a first liquid distribution branch connected to the first heat exchange module and a second liquid distribution branch connected to the second heat exchange module. Wherein, a first throttling element is provided in the first liquid distribution branch, and a second throttling element is provided in the second liquid distribution branch.

[0010] In some alternative embodiments, the second heat exchange module further includes a second flow path switching component connected to the second heat exchange tube group. Wherein, the second heat exchange tube group includes multiple heat exchange branches, and the second flow path switching component is configured to switch the connection mode of at least some of the heat exchange branches in the second heat exchange tube group in different operating modes.

[0011] In some alternative embodiments, the first heat exchange module further includes a first gas pipe header connected to the first heat exchange tube group, and the second heat exchange module further includes a second gas pipe header connected to the second heat exchange tube group. Wherein, the modular variable flow split heat exchanger further includes a gas collecting main pipe connected to the first gas pipe header and the second gas pipe header.

[0012] In some alternative embodiments, the first flow path switching component includes a first gas pipe conduction component connected to the first gas pipe header and a first liquid pipe conduction component connected to the first liquid pipe header; the second flow path switching component includes a second gas pipe conduction component connected to the second gas pipe header and a second liquid pipe conduction component connected to the second liquid pipe header.

[0013] In some alternative embodiments, the first heat exchange tube group includes a first heat exchange branch, a second heat exchange branch, and a third heat exchange branch. Wherein, one end of the first heat exchange branch is connected to the conduction outflow end side of the first gas pipe conduction component of the first gas pipe header, and the other end of the first heat exchange branch is connected to the conduction outflow end side of the first liquid pipe conduction component of the first liquid pipe header; one end of the second heat exchange branch is connected to the conduction inflow end side of the first gas pipe conduction component of the first gas pipe header, and the other end of the second heat exchange branch is connected to the conduction outflow end side of the first liquid pipe conduction component of the first liquid pipe header; one end of the third heat exchange branch is connected to the conduction inflow end side of the first gas pipe conduction component of the first gas pipe header, and the other end of the third heat exchange branch is connected to the conduction inflow end side of the first liquid pipe conduction component of the first liquid pipe header.

[0014] In some alternative embodiments, the second heat exchange tube group includes a fourth heat exchange branch, a fifth heat exchange branch, and a sixth heat exchange branch. One end of the fourth heat exchange branch communicates with one side of the conducting outflow end of the second air pipe conducting component of the second air pipe header, and the other end of the fourth heat exchange branch communicates with one side of the conducting outflow end of the second liquid pipe conducting component of the second liquid pipe header; one end of the fifth heat exchange branch communicates with one side of the conducting inflow end of the second air pipe conducting component of the second air pipe header, and the other end of the fifth heat exchange branch communicates with one side of the conducting outflow end of the second liquid pipe conducting component of the second liquid pipe header; one end of the sixth heat exchange branch communicates with one side of the conducting inflow end of the second air pipe conducting component of the second air pipe header, and the other end of the sixth heat exchange branch communicates with one side of the conducting inflow end of the second liquid pipe conducting component of the second liquid pipe header.

[0015] In some embodiments, the outdoor unit of the air conditioner includes the modular variable flow dividing heat exchanger as described above.

[0016] In some alternative embodiments, the outdoor unit of the air conditioner further includes: a first outdoor fan and a second outdoor fan, and the first outdoor fan is disposed above the second outdoor fan.

[0017] In some embodiments, the air conditioning system includes the outdoor unit of the air conditioner as described above.

[0018] In some alternative embodiments, the air conditioning system further includes: an indoor unit of the air conditioner, where an indoor heat exchanger and an indoor fan are disposed in the indoor unit of the air conditioner. Among them, no throttling element is provided between the indoor heat exchanger and the modular variable flow dividing heat exchanger.

[0019] In some alternative embodiments, the air conditioning system further includes: a controller, configured to adjust the opening degrees of the first throttling element and / or the second throttling element according to the operating mode or operating load of the air conditioning system.

[0020] In some alternative embodiments, the controller is further configured to, when the operating load of the air conditioning system is less than or equal to the target load, reduce the opening degree of the first throttling element to enable the first heat exchange module to store liquid.

[0021] In some alternative embodiments, the controller is further configured to, when the air conditioning system operates in a defrosting mode, control the indoor fan to turn off and increase the opening degrees of the first throttling element and / or the second throttling element.

[0022] The modular variable flow dividing heat exchanger, the outdoor heat exchanger, and the air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0023] The modular variable flow-dividing heat exchanger provided by an embodiment of the present disclosure includes a first heat exchange module, a second heat exchange module, and a liquid distribution element. Moreover, the first heat exchange module is provided with a first flow path switching component, so that the first heat exchange module is a variable flow-dividing heat exchange module. The liquid distribution element includes a first liquid distribution branch communicating with the first heat exchange module and a second liquid distribution branch communicating with the second heat exchange module. The first liquid distribution branch is provided with a first throttling element, and the second liquid distribution branch is provided with a second throttling element.

[0024] The first heat exchange module and the second heat exchange module are connected in parallel and communicated, and the first heat exchange module is arranged above the second heat exchange module. When the modular variable flow-dividing heat exchanger is used as an evaporator, the refrigerant flowing out of the liquid distribution element has a certain flow pressure and is also affected by gravity, and it is easy to occur the phenomenon that the refrigerant amounts distributed to the first heat exchange module and the second heat exchange module are uneven, which affects the heat exchange capacity of the modular variable flow-dividing heat exchanger.

[0025] In the modular variable flow-dividing heat exchanger provided by an embodiment of the present disclosure, the setting of the first throttling element and the second throttling element can adjust the refrigerant amounts flowing into the first heat exchange module and the second heat exchange module, so that the refrigerant amounts distributed to the first heat exchange module and the second heat exchange module are more uniform.

[0026] Moreover, the opening degrees of the first throttling element and the second throttling element can be adjusted according to the operating load of the air-conditioning system. For example, when the air-conditioning system operates at a low load, the opening degree of the first throttling element is adjusted smaller. In this way, the first heat exchange module connected to the first throttling element functions like a liquid receiver, reducing the refrigerant amount actually participating in the refrigerant cycle and improving the efficiency of the air-conditioning system.

[0027] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Description of the Drawings

[0028] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0029] Figure 1 is a schematic diagram of a modular variable flow-dividing heat exchanger provided by an embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of a first heat exchange module provided by an embodiment of the present disclosure;

[0031] Figure 3 is a schematic diagram of refrigerant flow when a first heat exchange module is used as a condenser provided by an embodiment of the present disclosure;

[0032] Figure 4 It is a schematic diagram of refrigerant flow when a first heat exchange module provided by an embodiment of the present disclosure serves as an evaporator;

[0033] Figure 5 It is a schematic diagram of a second heat exchange module provided by an embodiment of the present disclosure.

[0034] Reference numerals:

[0035] 100: Gas collecting main pipe; 11: First communication port; 12: Second communication port; 13: Third communication port;

[0036] 200: First heat exchange module; 201: First gas pipe header; 2011: First gas pipe conduction component; 202: First liquid pipe header; 2021: First liquid pipe conduction component; 2022: First liquid pipe inlet and outlet; 211: First heat exchange branch; 212: Second heat exchange branch; 213: Third heat exchange branch;

[0037] 300: Second heat exchange module; 301: Second gas pipe header; 3011: Second gas pipe conduction component; 302: Second liquid pipe header; 3021: Second liquid pipe conduction component; 3022: Second liquid pipe inlet and outlet; 311: Fourth heat exchange branch; 312: Fifth heat exchange branch; 313: Sixth heat exchange branch;

[0038] 400: Third heat exchange module;

[0039] 500: Liquid separation element; 510: First liquid separation branch; 511: First throttling element; 512: First liquid separation port; 520: Second liquid separation branch; 521: Second throttling element; 522: Second liquid separation port; 530: Third liquid separation branch; 531: Third throttling element. Detailed implementation manners

[0040] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give 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 shown in a simplified manner to simplify the drawings.

[0041] In the description and claims of the embodiments of the present disclosure and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0042] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. 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.

[0043] In addition, the terms "arranged", "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 directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0044] Unless otherwise specified, the term "plurality" means two or more.

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

[0046] The term "and / or" is an associative relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0047] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0048] The embodiments of the present disclosure provide a modular variable flow heat exchanger.

[0049] Optionally, the modular variable flow split heat exchanger includes a first heat exchange module 200, a second heat exchange module 300, and a liquid distribution element 500. The first heat exchange module 200 includes a first heat exchange tube group and a first flow path switching assembly connected to the first heat exchange tube group. The first heat exchange tube group includes a plurality of heat exchange branches, and the first flow path switching assembly is configured to switch the connection mode of at least some of the heat exchange branches in the first heat exchange tube group in different operating modes. The second heat exchange module 300 includes a second heat exchange tube group, and the second heat exchange module 300 is disposed below the first heat exchange module 200. The liquid distribution element 500 includes a first liquid distribution branch 510 connected to the first heat exchange module 200 and a second liquid distribution branch 520 connected to the second heat exchange module 300. Among them, a first throttling element 511 is provided on the first liquid distribution branch 510, and a second throttling element 521 is provided on the second liquid distribution branch 520.

[0050] When the modular variable flow split heat exchanger is used as an evaporator, the liquid distribution element 500 distributes liquid to the first heat exchange module 200 and the second heat exchange module 300 through the first liquid distribution branch 510 and the second liquid distribution branch 520 respectively. At this time, since the refrigerant flowing out of the liquid distribution element 500 is affected by factors such as gravity and flow pressure, and the first heat exchange module 200 is disposed above the second heat exchange module 300, there is a height difference between the two heat exchange modules. In this way, it is easy to occur that the refrigerant distribution amounts between the first heat exchange module 200 and the second heat exchange module 300 are different, thus reducing the heat exchange capacity of the modular variable flow split heat exchanger.

[0051] In the modular variable flow split heat exchanger provided by the embodiments of the present disclosure, a first throttling element 511 is provided on the first liquid distribution branch 510, and a second throttling element 521 is provided on the second liquid distribution branch 520. In this way, the refrigerant amounts of the first heat exchange module 200 and the second heat exchange module 300 can be adjusted by adjusting the opening degrees of the first throttling element 511 and the second throttling element 521, thereby improving the heat exchange capacity of the modular variable flow split heat exchanger. For example, when the refrigerant amount obtained by the first heat exchange module 200 is less than the refrigerant amount obtained by the second heat exchange module 300, the opening degree of the first throttling element 511 can be increased, and the opening degree of the second throttling element 521 can be decreased, so that the opening degree of the first throttling element 511 is greater than the opening degree of the second throttling element 521, thereby improving the uniformity of the refrigerant distribution amount between the first heat exchange module 200 and the second heat exchange module 300.

[0052] Optionally, the refrigerant amounts of the first heat exchange module 200 and the second heat exchange module 300 can be judged by the refrigerant outlet temperature of the first heat exchange module 200 and the refrigerant outlet temperature of the second heat exchange module 300.

[0053] Optionally, when the air-conditioning system operates at low load, at this time, the opening degree of the first throttling element 511 can be adjusted to a smaller value, so that the first heat exchange module 200 functions similar to a liquid storage element, and part of the refrigerant in the air-conditioning system is stored in the first heat exchange module 200, reducing the amount of refrigerant participating in the refrigerant cycle and improving the efficiency of the air-conditioning system. Alternatively, the opening degree of the second throttling element 521 can also be adjusted to a smaller value to make the second heat exchange module 300 function similar to a liquid storage element.

[0054] It can be seen that the modular variable flow split heat exchanger provided by the embodiments of the present disclosure improves the uniformity of the refrigerant distribution amount between different heat exchange modules and enhances the heat exchange capacity of the heat exchanger. At the same time, the amount of refrigerant actually participating in the refrigerant cycle can be adjusted according to the operating load of the air-conditioning system, improving the efficiency of the air-conditioning system.

[0055] The first flow path switching component is used to switch the connection modes of at least some different heat exchange branches in the first heat exchange tube group in different operating modes, and the first flow path switching component can form different connection modes between the heat exchange branches. For example, when the modular variable flow split heat exchanger serves as a condenser, at least some heat exchange branches in the first heat exchange tube group are connected in series. When the modular variable flow split heat exchanger serves as an evaporator, at least some heat exchange branches in the first heat exchange tube group are connected in parallel. That is, the first heat exchange module 200 is a variable flow split heat exchange module. In this way, the first flow path switching component enables the first heat exchange module 200 to have an optimal flow path in different operating modes, improving the heat exchange efficiency of the modular variable flow split heat exchanger.

[0056] Optionally, the first flow path switching component can be a conducting 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 can be a combination of a header and a valve component, or a combination of a bypass pipe and a valve component, etc. Optionally, the conducting component with a one-way conduction function includes a one-way valve, a solenoid valve, and structural components such as a slider and a baffle that exhibit one-way conduction.

[0057] Optionally, the second heat exchange module 300 further includes a second flow path switching component connected to the second heat exchange tube group. Among them, the second heat exchange tube group includes multiple heat exchange branches, and the second flow path switching component is used to switch the connection modes of at least some heat exchange branches in the second heat exchange tube group in different operating modes.

[0058] Similarly, the second flow path switching component is used to switch the connection modes of at least some different heat exchange branches in the second heat exchange tube group under different operating modes, and the second flow path switching component can form different connection modes between the heat exchange branches. For example, when the modular variable flow splitting heat exchanger is used as a condenser, at least some of the heat exchange branches in the second heat exchange tube group are connected in series. When the modular variable flow splitting heat exchanger is used as an evaporator, at least some of the heat exchange branches in the second heat exchange tube group are connected in parallel. That is, the second heat exchange module 300 is a variable flow splitting heat exchange module. In this way, the second flow path switching component enables the second heat exchange module 300 to have an optimal flow path under different operating modes, improving the heat exchange efficiency of the modular variable flow splitting heat exchanger.

[0059] Optionally, the second flow path switching component can be a conducting 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 second flow path switching component can be a combination of a header and a valve component, or a combination of a bypass pipe and a valve component, etc. Optionally, the conducting component with a one-way conduction function includes a one-way valve, a solenoid valve, and structural components such as a slider and a baffle with a one-way conduction function that play a one-way conduction role.

[0060] Optionally, the modular variable flow splitting heat exchanger further includes a third heat exchange module 400, and the third heat exchange module 400 is arranged below the second heat exchange module 300. Similarly, the third heat exchange module 400 is also a variable flow splitting heat exchange module. The liquid separation element 500 further includes a third liquid separation branch 530, and the third liquid separation branch 530 is connected to the third heat exchange module 400, and a third throttling element 531 is arranged on the third liquid separation branch 530 for adjusting the refrigerant distribution amount of the third heat exchange module 400.

[0061] Optionally, when the air conditioning system operates at low load, the opening degrees of the first throttling element 511 and the second throttling element 521 can be adjusted simultaneously, that is, the first heat exchange module 200 and the second heat exchange module 300 are made to function similar to a liquid storage element, and the third heat exchange module 400 located at the lower part is used for heat exchange.

[0062] The first liquid separation branch 510 includes a first liquid separation port 512 communicating with the liquid separation chamber of the liquid separation element 500, and the second liquid separation branch 520 includes a second liquid separation port 522 communicating with the liquid separation chamber of the liquid separation element 500. Among them, the distance from the first liquid separation port 512 to the first throttling element 511 is the first distance, and the distance from the second liquid separation port 522 to the second throttling element 521 is the second distance. Moreover, the first distance is less than or equal to the second distance. After passing through the throttling element, the refrigerant will have a certain accelerating effect. In the embodiment of the present disclosure, compared with the second heat exchange module 300, the first heat exchange module 200 is set at a higher height. The distance from the first liquid separation port 512 to the first throttling element 511 is smaller, so that it is beneficial to the accelerating effect of the first throttling element 511 on the refrigerant and improves the liquid separation effect on the first heat exchange module 200.

[0063] The first liquid pipe header 202 includes a first liquid pipe inlet / outlet 2022 communicating with the first liquid separation branch 510, and the second liquid pipe header 302 includes a second liquid pipe inlet / outlet 3022 communicating with the second liquid separation branch 520. Among them, the distance from the first liquid pipe inlet / outlet 2022 to the first throttling element 511 is the third distance, and the distance from the second liquid pipe inlet / outlet 3022 to the second throttling element 521 is the fourth distance. Moreover, the third distance is greater than or equal to the fourth distance.

[0064] It can be understood that the first distance, the second distance, the third distance, and the fourth distance are the lengths of the refrigerant flow paths.

[0065] Optionally, the first heat exchange module 200 further includes a first gas pipe header 201 communicating with the first heat exchange tube group, and the second heat exchange module 300 further includes a second gas pipe header 301 communicating with the second heat exchange tube group. Among them, the modular variable flow splitting heat exchanger further includes a gas collecting main pipe 100 communicating with the first gas pipe header 201 and the second gas pipe header 301.

[0066] The gas collecting main pipe 100 is communicated with the first gas pipe header 201 and the second gas pipe header 301. Optionally, the gas collecting main pipe 100 is provided with a first communication port 11 communicating with the first gas pipe header 201, and the gas collecting main pipe 100 is provided with a second communication port 12 communicating with the second gas pipe header 301. When the modular variable flow splitting heat exchanger further includes a third heat exchange module 400, the third heat exchange module 400 further includes a third gas pipe header, and the gas collecting main pipe 100 is provided with a third communication port 13 communicating with the third gas pipe header.

[0067] Optionally, the first flow path switching component includes a first gas pipe conduction member 2011 connected to the first gas pipe header 201, and a first liquid pipe conduction member 2021 connected to the first liquid pipe header 202. The second flow path switching component includes a second gas pipe conduction member 3011 connected to the second gas pipe header 301, and a second liquid pipe conduction member 3021 connected to the second liquid pipe header 302.

[0068] The first gas pipe conduction member 2011 and the first liquid pipe conduction member 2021 in the first flow path switching component are one-way conduction members. When the modular variable flow split heat exchanger serves as an evaporator, the first gas pipe conduction member 2011 and the first liquid pipe conduction member 2021 are conductive; when the modular variable flow split heat exchanger serves as a condenser, the first gas pipe conduction member 2011 and the first liquid pipe conduction member 2021 are closed.

[0069] Similarly, the second gas pipe conduction member 3011 and the second liquid pipe conduction member 3021 in the second flow path switching component are one-way conduction members. When the modular variable flow split heat exchanger serves as an evaporator, the second gas pipe conduction member 3011 and the second liquid pipe conduction member 3021 are conductive; when the modular variable flow split heat exchanger serves as a condenser, the second gas pipe conduction member 3011 and the second liquid pipe conduction member 3021 are closed.

[0070] Optionally, the first heat exchange tube group includes a first heat exchange branch 211, a second heat exchange branch 212, and a third heat exchange branch 213. Among them, one end of the first heat exchange branch 211 is connected to the conductive outflow end side of the first gas pipe conduction member 2011 of the first gas pipe header 201, and the other end of the first heat exchange branch 211 is connected to the conductive outflow end side of the first liquid pipe conduction member 2021 of the first liquid pipe header 202; one end of the second heat exchange branch 212 is connected to the conductive inflow end side of the first gas pipe conduction member 2011 of the first gas pipe header 201, and the other end of the second heat exchange branch 212 is connected to the conductive outflow end side of the first liquid pipe conduction member 2021 of the first liquid pipe header 202; one end of the third heat exchange branch 213 is connected to the conductive inflow end side of the first gas pipe conduction member 2011 of the first gas pipe header 201, and the other end of the third heat exchange branch 213 is connected to the conductive inflow end side of the first liquid pipe conduction member 2021 of the first liquid pipe header 202.

[0071] When the modular variable flow split heat exchanger serves as an evaporator, the first gas pipe conduction member 2011 and the first liquid pipe conduction member 2021 are conductive. At this time, the first heat exchange branch 211, the second heat exchange branch 212, and the third heat exchange branch 213 are connected in parallel. That is, the refrigerant flowing out of the first liquid pipe header 202 flows into the first heat exchange branch 211, the second heat exchange branch 212, and the third heat exchange branch 213 respectively, as Figure 4As shown. When the modular variable flow-dividing heat exchanger is used as a condenser, the first gas pipe conduction component 2011 and the first liquid pipe conduction component 2021 are closed. At this time, the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213 are connected in series. That is, the refrigerant flowing out of the first gas pipe header 201 flows through the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213 in sequence, as Figure 3 shown.

[0072] Optionally, the number of the first heat exchange branches 211 can be one or more. As Figures 1 to 4 shown, the number of the first heat exchange branches 211 is two, and these two heat exchange branches are in a parallel form.

[0073] Optionally, the second heat exchange tube group includes a fourth heat exchange branch 311, a fifth heat exchange branch 312 and a sixth heat exchange branch 313. Among them, one end of the fourth heat exchange branch 311 is connected to the conduction outflow end side of the second gas pipe conduction component 3011 of the second gas pipe header 301, and the other end of the fourth heat exchange branch 311 is connected to the conduction outflow end side of the second liquid pipe conduction component 3021 of the second liquid pipe header 302; one end of the fifth heat exchange branch 312 is connected to the conduction inflow end side of the second gas pipe conduction component 3011 of the second gas pipe header 301, and the other end of the fifth heat exchange branch 312 is connected to the conduction outflow end side of the second liquid pipe conduction component 3021 of the second liquid pipe header 302; one end of the sixth heat exchange branch 313 is connected to the conduction inflow end side of the second gas pipe conduction component 3011 of the second gas pipe header 301, and the other end of the sixth heat exchange branch 313 is connected to the conduction inflow end side of the second liquid pipe conduction component 3021 of the second liquid pipe header 302, as Figure 5 described.

[0074] When the modular variable flow-dividing heat exchanger is used as an evaporator, the second gas pipe conduction component 3011 and the second liquid pipe conduction component 3021 are conducted. At this time, the fourth heat exchange branch 311, the fifth heat exchange branch 312 and the sixth heat exchange branch 313 are connected in parallel. That is, the refrigerant flowing out of the second liquid pipe header 302 flows into the fourth heat exchange branch 311, the fifth heat exchange branch 312 and the sixth heat exchange branch 313 respectively. When the modular variable flow-dividing heat exchanger is used as a condenser, the second gas pipe conduction component 3011 and the second liquid pipe conduction component 3021 are closed. At this time, the fourth heat exchange branch 311, the fifth heat exchange branch 312 and the sixth heat exchange branch 313 are connected in series. That is, the refrigerant flowing out of the second gas pipe header 301 flows through the fourth heat exchange branch 311, the fifth heat exchange branch 312 and the sixth heat exchange branch 313 in sequence.

[0075] Optionally, the number of the fourth heat exchange branches 311 can be one or more. As Figure 1 and Figure 5As shown, the number of the fourth heat exchange branch 311 is two, and these two heat exchange branches are in a parallel form.

[0076] The embodiment of the present disclosure further provides an outdoor unit of an air conditioner, including the modular variable flow-dividing heat exchanger as described above.

[0077] When the outdoor unit of the air conditioner provided by the embodiment of the present disclosure is adopted, the effects thereof are the same as those described for the above modular variable flow-dividing heat exchanger, and will not be elaborated herein.

[0078] Optionally, the outdoor unit of the air conditioner further includes a first outdoor fan and a second outdoor fan, and the first outdoor fan is arranged above the second outdoor fan.

[0079] The first outdoor fan and the second outdoor fan are arranged vertically. When the air-conditioning system is in a low-load operation mode, the first outdoor fan can be controlled to be turned off and the second outdoor fan can be turned on.

[0080] The embodiment of the present disclosure further provides an air-conditioning system, including the outdoor unit of the air conditioner as described above.

[0081] When the air-conditioning system provided by the embodiment of the present disclosure is adopted, the effects thereof are the same as those described for the above outdoor unit of the air conditioner and the modular variable flow-dividing heat exchanger, and will not be elaborated herein.

[0082] Optionally, the air-conditioning system further includes an indoor unit of the air conditioner, and an indoor heat exchanger and an indoor fan are arranged in the indoor unit of the air conditioner. Among them, no throttling element is arranged between the indoor heat exchanger and the modular variable flow-dividing heat exchanger.

[0083] The first throttling element 511, the second throttling element 521 and the third throttling element 531 arranged on the first liquid separation branch 510, the second liquid separation branch 520 and the third liquid separation branch 530 can replace the throttling element between the original indoor heat exchanger and the outdoor heat exchanger. At this time, no throttling element needs to be arranged between the indoor heat exchanger and the modular variable flow-dividing heat exchanger serving as the outdoor heat exchanger. Optionally, the first throttling element 511, the second throttling element 521 and the third throttling element 531 are electronic expansion valves.

[0084] In the embodiment of the present disclosure, two or three throttling elements are used to replace the existing one throttling element. In this way, the flow cross-section is increased in the vertical direction, which is beneficial to the defrosting effect of the modular variable flow-dividing heat exchanger when the air-conditioning system operates in the hot-flow defrosting mode. It can be understood that the hot-flow defrosting mode is to control the air-conditioning system to operate in the heating mode and control the indoor fan to be turned off, so that the high-temperature refrigerant flowing out of the compressor flows into the modular variable flow-dividing heat exchanger serving as the outdoor heat exchanger for defrosting.

[0085] Optionally, the air conditioning system further includes a controller configured to adjust the opening degrees of the first throttling element 511 and / or the second throttling element 521 according to the operating mode or operating load of the air conditioning system.

[0086] By adjusting the opening degrees of the first throttling element 511, the second throttling element 521, and / or the third throttling element 531, the refrigerant amounts among the respective heat exchange modules of the current modular variable flow-dividing heat exchanger can be made more uniform.

[0087] Optionally, the controller is further configured to reduce the opening degree of the first throttling element 511 when the operating load of the air conditioning system is less than or equal to the target load, so that the first heat exchange module 200 stores liquid.

[0088] It can be understood that when the operating load of the air conditioning system is less than the target load, it can be considered that the air conditioning system is in a low-load operating mode. At this time, the opening degree of the first throttling element 511 can be reduced, so that the opening degree of the second throttling element 521 is greater than that of the first throttling element 511, enabling the first heat exchange module 200 to store liquid. Optionally, when the modular variable flow-dividing heat exchanger further includes a third heat exchange module 400, the opening degrees of the first throttling element 511 and the second throttling element 521 can be reduced, so that the opening degree of the third throttling element 531 is greater than those of the first throttling element 511 and the second throttling element 521, enabling the first heat exchange module 200 and the second heat exchange module 300 to store liquid.

[0089] Optionally, the controller is further configured to control the indoor fan to turn off and increase the opening degrees of the first throttling element 511 and / or the second throttling element 521 when the air conditioning system operates in a defrosting mode. When the air conditioner operates in a hot gas defrosting mode, the opening degrees of the first throttling element 511 and the second throttling element 521 can be increased. In this way, the refrigerant temperature flowing into the first heat exchange module 200 and the second heat exchange module 300 is increased, improving the defrosting effect on the modular variable flow-dividing heat exchanger.

[0090] Optionally, the opening degrees of the first throttling element 511 and the second throttling element 521 can be adjusted according to the frost thickness at different positions of the modular variable flow-dividing heat exchanger. For example, when the frost thickness on the surface of the first heat exchange module 200 is relatively large and the frost thickness on the surface of the second heat exchange module 300 is relatively small, the opening degree of the first throttling element 511 can be increased, and the opening degree of the second throttling element 521 can be reduced. In this way, the defrosting effect on the first heat exchange module 200 can be improved specifically.

[0091] The above description and drawings sufficiently illustrate embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. Embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in 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 drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A modular variable flow divider heat exchanger, characterized in that, Comprising: A first heat exchange module, including a first heat exchange tube group and a first flow path switching component connected to the first heat exchange tube group. The first heat exchange tube group includes multiple heat exchange branches, and the first flow path switching component is used to switch the connection mode of at least some of the heat exchange branches in the first heat exchange tube group in different operating modes; A second heat exchange module, including a second heat exchange tube group, and the second heat exchange module is arranged below the first heat exchange module; and, A liquid separation element, including a first liquid separation branch connected to the first heat exchange module and a second liquid separation branch connected to the second heat exchange module, wherein, a first throttling element is arranged on the first liquid separation branch, and a second throttling element is arranged on the second liquid separation branch.

2. The modular variable flow splitting heat exchanger according to claim 1, characterized in that, The second heat exchange module further includes a second flow path switching component connected to the second heat exchange tube group, wherein, the second heat exchange tube group includes multiple heat exchange branches, and the second flow path switching component is used to switch the connection mode of at least some of the heat exchange branches in the second heat exchange tube group in different operating modes.

3. The modular variable flow splitting heat exchanger according to claim 2, characterized in that, The first heat exchange module further includes a first gas pipe header connected to the first heat exchange tube group, and the second heat exchange module further includes a second gas pipe header connected to the second heat exchange tube group, wherein, the modular variable flow splitting heat exchanger further includes a gas collecting main pipe connected to the first gas pipe header and the second gas pipe header.

4. The modular variable flow splitting heat exchanger according to claim 3, characterized in that, The first flow path switching component includes a first gas pipe conducting component connected to the first gas pipe header and a first liquid pipe conducting component connected to the first liquid pipe header; The second flow path switching component includes a second gas pipe conducting component connected to the second gas pipe header and a second liquid pipe conducting component connected to the second liquid pipe header.

5. The modular variable flow splitting heat exchanger according to claim 4, characterized in that, The first liquid separation branch includes a first liquid separation port connected to the liquid separation cavity of the liquid separation element, and the second liquid separation branch includes a second liquid separation port connected to the liquid separation cavity of the liquid separation element, wherein, the distance from the first liquid separation port to the first throttling element is a first distance, the distance from the second liquid separation port to the second throttling element is a second distance, and the first distance is less than or equal to the second distance.

6. The modular variable flow splitting heat exchanger according to claim 4, characterized in that, The first heat exchange tube group includes a first heat exchange branch, a second heat exchange branch, and a third heat exchange branch. Among them, one end of the first heat exchange branch is connected to the side of the conduction outflow end of the first gas pipe conduction component of the first gas pipe header, and the other end of the first heat exchange branch is connected to the side of the conduction outflow end of the first liquid pipe conduction component of the first liquid pipe header; one end of the second heat exchange branch is connected to the side of the conduction inflow end of the first gas pipe conduction component of the first gas pipe header, and the other end of the second heat exchange branch is connected to the side of the conduction outflow end of the first liquid pipe conduction component of the first liquid pipe header; one end of the third heat exchange branch is connected to the side of the conduction inflow end of the first gas pipe conduction component of the first gas pipe header, and the other end of the third heat exchange branch is connected to the side of the conduction inflow end of the first liquid pipe conduction component of the first liquid pipe header. The second heat exchange tube group includes a fourth heat exchange branch, a fifth heat exchange branch, and a sixth heat exchange branch. Among them, one end of the fourth heat exchange branch is connected to the side of the conduction outflow end of the second gas pipe conduction component of the second gas pipe header, and the other end of the fourth heat exchange branch is connected to the side of the conduction outflow end of the second liquid pipe conduction component of the second liquid pipe header; one end of the fifth heat exchange branch is connected to the side of the conduction inflow end of the second gas pipe conduction component of the second gas pipe header, and the other end of the fifth heat exchange branch is connected to the side of the conduction outflow end of the second liquid pipe conduction component of the second liquid pipe header; one end of the sixth heat exchange branch is connected to the side of the conduction inflow end of the second gas pipe conduction component of the second gas pipe header, and the other end of the sixth heat exchange branch is connected to the side of the conduction inflow end of the second liquid pipe conduction component of the second liquid pipe header.

7. An outdoor unit of an air conditioner, characterized in that, It includes the modular variable flow divider heat exchanger according to any one of claims 1 to 6.

8. The air conditioner outdoor unit according to claim 7, characterized in that, It further includes: A first outdoor fan and a second outdoor fan, and the first outdoor fan is arranged above the second outdoor fan.

9. An air conditioning system, characterized in that, It includes the air conditioner outdoor unit according to claim 7 or 8.

10. The air-conditioning system according to claim 9, characterized in that, It further includes: An air conditioner indoor unit, in which an indoor heat exchanger and an indoor fan are provided. Among them, no throttling element is provided between the indoor heat exchanger and the modular variable flow divider heat exchanger.

11. The air-conditioning system according to claim 10, wherein, It further includes: A controller for adjusting the opening degrees of the first throttling element and / or the second throttling element according to the operating mode or operating load of the air conditioning system.

12. The air conditioning system according to claim 11, wherein the controller is further configured to reduce the opening degree of the first throttling element when the operating load of the air conditioning system is less than or equal to the target load, so that the first heat exchange module stores liquid.

13. The air conditioning system according to claim 11, wherein the controller is further configured to control the indoor fan to close and increase the opening degrees of the first throttling element and / or the second throttling element when the air conditioning system operates in the defrosting mode.

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