Variable shunting heat exchanger and air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, and discloses a variable flow dividing heat exchanger which comprises a first heat exchange module and a second heat exchange module, the first heat exchange module comprises a first heat exchange pipe set and a first air pipe component communicating with the first heat exchange pipe set, and the first air pipe component comprises a first air pipe branch pipe, a second air pipe branch pipe and a third air pipe branch pipe; the second heat exchange module is arranged on the lower portion of the first heat exchange module and comprises a second heat exchange pipe set and a second air pipe component communicated with the second heat exchange pipe set, the second air pipe component comprises a fourth air pipe branch pipe, a fifth air pipe branch pipe and a sixth air pipe branch pipe, the distance between the second air pipe branch pipe and a third air pipe branch pipe is H1, and the distance between the third air pipe branch pipe and the fourth air pipe branch pipe is H2. The distance between the fifth air pipe branch pipe and the sixth air pipe branch pipe is H2, and H1 is smaller than H2. According to the variable shunting heat exchanger provided by the embodiment of the utility model, variable shunting of a larger heat exchanger is effectively realized. The invention further provides an air conditioning system.

Description

Technical Field

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

[0002] Heat exchangers are important heat exchange components for air conditioning systems to perform cooling and heating. Taking a split air conditioning system as an example, the heat exchangers include an outdoor heat exchanger installed in the air conditioning outdoor unit and an indoor heat exchanger installed in the air conditioning indoor unit. Heat exchangers usually include tube-fin heat exchangers, parallel flow microchannel heat exchangers, or shell-and-tube heat exchangers.

[0003] When the air conditioning system is running in different modes, the optimal flow path of the heat exchanger required is different. Taking the outdoor heat exchanger as an example, when the air conditioning system is running in cooling mode, the longer the refrigerant flow path of the heat exchanger, the better the supercooling effect of the refrigerant in the heat exchanger; when the air conditioning system is running in heating mode, the more refrigerant paths the heat exchanger has, the better the heat exchange effect of the heat exchanger.

[0004] At present, a variable split flow heat exchanger can enable the heat exchanger to have different connection modes in different operation modes, so that the heat exchanger has a better heat exchange effect in different operation modes.

[0005] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0006] The current variable split heat exchanger cannot be directly applied to heat exchangers in large commercial air-conditioning systems.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0008] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0009] The embodiment of the present disclosure provides a variable split heat exchanger and an air conditioning system, comprising: a first heat exchange module, comprising a first heat exchange tube group and a first air pipe component connected to the first heat exchange tube group, and the first air pipe component comprises a first air pipe branch, a second air pipe branch and a third air pipe branch, and a second heat exchange module, arranged at the lower part of the first heat exchange module, the second heat exchange module comprises a second heat exchange tube group and a second air pipe component connected to the second heat exchange tube group, and the second air pipe component comprises a fourth air pipe branch, a fifth air pipe branch and a sixth air pipe branch. The distance between the second air pipe branch and the third air pipe branch is H1, and the distance between the fifth air pipe branch and the sixth air pipe branch is H2, wherein H1<H2.

[0010] In some optional embodiments, the total height of the variable split heat exchanger is H, wherein the difference between H2 and H1 is positively correlated with H.

[0011] In some optional embodiments, the number of the first heat exchange modules is n, where n is positively correlated with H2.

[0012] In some optional embodiments, 2H1≤H2.

[0013] In some optional embodiments, the first air pipe component also includes a first air collecting pipe and a first air pipe valve component connected to the first air collecting pipe, wherein the first air pipe branch is arranged on the side of the conducting outflow end of the first air pipe valve component of the first air collecting pipe, and the second air pipe branch and the third air pipe branch are arranged on the side of the conducting inflow end of the first air pipe valve component of the first air collecting pipe; the second air pipe component also includes a second air collecting pipe and a second air pipe valve component connected to the second air collecting pipe, wherein the fourth air pipe branch is arranged on the side of the conducting outflow end of the second air pipe valve component of the second air collecting pipe, and the fifth air pipe branch and the sixth air pipe branch are arranged on the side of the conducting inflow end of the second air pipe valve component of the second air collecting pipe.

[0014] In some optional 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 the first heat exchange branch is connected to the first air pipe branch, the second heat exchange branch is connected to the second air pipe branch, and the third heat exchange branch is connected to the third air pipe branch; the second heat exchange tube group includes a fourth heat exchange branch, a fifth heat exchange branch and a sixth heat exchange branch, wherein the fourth heat exchange branch is connected to the fourth air pipe branch, the fifth heat exchange branch is connected to the fifth air pipe branch, and the sixth heat exchange branch is connected to the sixth air pipe branch.

[0015] In some optional embodiments, the variable split heat exchanger further includes: an air collecting manifold connected to the first air pipe component and the second air pipe component.

[0016] In some optional embodiments, the first heat exchange module also includes a first liquid pipe component, the first liquid pipe component includes a first liquid collecting pipe and a first liquid pipe valve component connected to the first liquid collecting pipe, and a first liquid pipe branch and a second liquid pipe branch are arranged on one side of the conducting outflow end of the first liquid pipe valve component of the first liquid collecting pipe, and a third liquid pipe branch is arranged on one side of the conducting inflow end of the first liquid pipe valve component of the first liquid collecting pipe, wherein the first heat exchange branch is connected to the first liquid pipe branch, the second heat exchange branch is connected to the second liquid pipe branch, and the third heat exchange branch is connected to the third liquid pipe branch.

[0017] In some optional embodiments, the second heat exchange module also includes a second liquid pipe component, the second liquid pipe component includes a second liquid collecting pipe and a second liquid pipe valve component connected to the second liquid collecting pipe, and a fourth liquid pipe branch and a fifth liquid pipe branch are arranged on one side of the conducting outflow end of the second liquid pipe valve component of the second liquid collecting pipe, and a sixth liquid pipe branch is arranged on one side of the conducting inflow end of the second liquid pipe valve component of the second liquid collecting pipe, wherein the fourth heat exchange branch is connected to the fourth liquid pipe branch, the fifth heat exchange branch is connected to the fifth liquid pipe branch, and the sixth heat exchange branch is connected to the sixth liquid pipe branch.

[0018] In some optional embodiments, the variable split heat exchanger further includes: a subcooling tube group, which is arranged at the lower part of the second heat exchange module.

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

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

[0021] The variable split heat exchanger includes a first heat exchange module and a second heat exchange module. The first heat exchange module includes a first heat exchange tube group and a first air pipe component connected to the first heat exchange tube group, and the second heat exchange module includes a second heat exchange tube group and a second air pipe component connected to the second heat exchange tube group. The first air pipe component includes a first air pipe branch, a second air pipe branch and a third air pipe branch, and the second air pipe component includes a fourth air pipe branch, a fifth air pipe branch and a sixth air pipe branch. The distance between the second air pipe branch and the third air pipe branch is H1, the distance between the fifth air pipe branch and the sixth air pipe branch is H2, and H1<H2.

[0022] When the variable split flow heat exchanger is used as a condenser, at this time, the variable split flow heat exchanger is located on the high-pressure side, the refrigerant flow pressure entering from the gas collecting main pipe is relatively large, and the impact force of the airflow is relatively large. In this way, more gaseous refrigerant will impact the lower end of the gas collecting main pipe, and then there will be a phenomenon that more refrigerant flows into the second heat exchange module located at the lower part. In the embodiment of the present disclosure, the distance between the fifth air duct branch and the sixth air duct branch in the second heat exchange module is greater than the distance between the second air duct branch and the third air duct branch. In this way, the spacing between the air duct branches of the second heat exchange module located at the lower end is increased, which actively increases the flow resistance of the refrigerant, thereby appropriately reducing the total amount of refrigerant flowing into the second heat exchange module, and appropriately increasing the total amount of refrigerant flowing into the first heat exchange module, which plays a role in active flow equalization.

[0023] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0025] Figure 1 is a schematic diagram of a variable split heat exchanger provided by an embodiment of the present disclosure;

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

[0027] Figure 3 is a schematic diagram of a second heat exchange module provided by an embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of a refrigerant flow path when a variable split flow heat exchanger provided by an embodiment of the present disclosure is used as a condenser;

[0029] Figure 5 It is a schematic diagram of the refrigerant flow path when a variable split heat exchanger provided by an embodiment of the present disclosure is used as an evaporator.

[0030] Reference numerals:

[0031] 100: gas collecting main pipe;

[0032] 110: first air pipe component; 111: first air collecting pipe; 112: first air pipe valve component; 113: first air pipe branch pipe; 114: second air pipe branch pipe; 115: third air pipe branch pipe;

[0033] 120: second air pipe component; 121: second air collecting pipe; 122: second air pipe valve component; 123: fourth air pipe branch pipe; 124: fifth air pipe branch pipe; 125: sixth air pipe branch pipe;

[0034] 210: first heat exchange tube group; 211: first heat exchange branch; 212: second heat exchange branch; 213: third heat exchange branch;

[0035] 220: second heat exchange tube group; 221: fourth heat exchange branch; 222: fifth heat exchange branch; 223: sixth heat exchange branch;

[0036] 230: subcooling tube group;

[0037] 310: first liquid pipe member; 311: first liquid collecting pipe; 312: first liquid pipe valve member; 313: first liquid pipe branch pipe; 314: second liquid pipe branch pipe; 315: third liquid pipe branch pipe;

[0038] 320: second liquid pipe component; 321: second liquid collecting pipe; 322: second liquid pipe valve component; 323: fourth liquid pipe branch pipe; 324: fifth liquid pipe branch pipe; 325: sixth liquid pipe branch pipe. DETAILED DESCRIPTION

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

[0040] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of 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 inclusions.

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

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

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

[0044] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0045] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0046] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0047] The present disclosure provides a variable split flow heat exchanger. Figures 1 to 5 shown.

[0048] Optionally, the variable split heat exchanger includes a first heat exchange module and a second heat exchange module. The first heat exchange module includes a first heat exchange tube group 210 and a first air pipe component 110 connected to the first heat exchange tube group 210, and the first air pipe component 110 includes a first air pipe branch 113, a second air pipe branch 114 and a third air pipe branch 115. The second heat exchange module is arranged at the lower part of the first heat exchange module, and the second heat exchange module includes a second heat exchange tube group 220 and a second air pipe component 120 connected to the second heat exchange tube group 220, and the second air pipe component 120 includes a fourth air pipe branch 123, a fifth air pipe branch 124 and a sixth air pipe branch 125. The distance between the second air pipe branch 114 and the third air pipe branch 115 is H1, and the distance between the fifth air pipe branch 124 and the sixth air pipe branch 125 is H2, wherein H1<H2.

[0049] A variable split heat exchanger is a heat exchanger in which the heat exchange branches have different connection modes in different operating modes, so that the connection mode of the heat exchange branches conforms to the current operating mode of the air conditioner. For example, when the variable split heat exchanger is used as a condenser, multiple heat exchange branches in the first heat exchange module are connected in series, and multiple heat exchange branches in the second heat exchange module are also connected in series; when the variable split heat exchanger is used as an evaporator, multiple heat exchange branches in the first heat exchange module are connected in parallel, and multiple heat exchange branches in the second heat exchange module are also connected in parallel.

[0050] The variable flow split heat exchanger provided in the embodiment of the present disclosure includes a first heat exchange module and a second heat exchange module. In the same heat exchanger, multiple variable flow split modules are provided, so that a larger commercial air conditioner can achieve variable flow split. At the same time, the second heat exchange module is located at the lower part of the first heat exchange module, and the distance H2 between the fifth air duct branch 124 and the sixth air duct branch 125 in the second heat exchange module is greater than the distance H1 between the second air duct branch 114 and the third air duct branch 115 in the first heat exchange module. Figure 2 and Figure 3 shown.

[0051] When the variable split heat exchanger is used as a condenser, the heat exchanger is located at the high-pressure end, and the flow pressure of the refrigerant is relatively high. When the high-pressure gaseous refrigerant flows in the gas collecting main pipe 100 in the variable split heat exchanger, due to the large impact force, more refrigerant will impact and flow into the second heat exchange module located at the bottom, thereby causing the first heat exchange module and the second heat exchange module to have uneven refrigerant distribution.

[0052] In the variable flow split heat exchanger provided by the embodiment of the present disclosure, the distance between the two air pipe branches of the second heat exchange module located at the bottom is greater than the distance between the two air pipe branches of the first heat exchange module located at the top. In this way, the resistance of the second heat exchange module located at the bottom is increased, thereby appropriately increasing the amount of refrigerant flowing into the first heat exchange module, improving the heat exchange uniformity between different heat exchange modules of the variable flow split heat exchanger, and thereby improving the heat exchange capacity of the variable flow split heat exchanger.

[0053] Optionally, the total height of the variable split heat exchanger is H, wherein the difference between H2 and H1 is positively correlated with H.

[0054] Considering the total height of the entire heat exchanger, the greater the total height H of the heat exchanger, the greater the difference between H2 and H1, that is, the difference between H2 and H1 is positively correlated with H. For example, the relationship between the difference between H2 and H1 and H can be a proportional relationship, but is not limited to a proportional relationship. In this way, the uniformity of the refrigerant flow of the entire variable split heat exchanger is improved.

[0055] Optionally, the number of the first heat exchange modules is n, where n is positively correlated with H2.

[0056] The variable split heat exchanger includes n first heat exchange modules and one second heat exchange module. It is understandable that the distance between the second air duct branch 114 and the third air duct branch 115 in the n first heat exchange modules is H1. Optionally, n can be 2, 3, 4, 5, etc. In the variable split heat exchanger, the more the number of first heat exchange modules, the larger H2. For example, the relationship between n and H2 can be a proportional relationship, but is not limited to a proportional relationship. Alternatively, the more the number of first heat exchange modules, the greater the difference between H2 and H1. In this way, the uniformity of the refrigerant flow of the entire variable split heat exchanger is improved.

[0057] Optionally, 2H1≤H2.

[0058] For example, when the total height H of the variable split heat exchanger is relatively large, or the number of the first heat exchange modules is relatively large, H2 may be greater than 2 times of H1 to improve the refrigerant flow uniformity of the entire variable split heat exchanger.

[0059] Optionally, the first air pipe component 110 further includes a first air collecting pipe 111 and a first air pipe valve component 112 connected to the first air collecting pipe 111, wherein the first air pipe branch pipe 113 is arranged on the side of the conduction outflow end of the first air pipe valve component 112 of the first air collecting pipe 111, and the second air pipe branch pipe 114 and the third air pipe branch pipe 115 are arranged on the side of the conduction inflow end of the first air pipe valve component 112 of the first air collecting pipe 111. Figure 2 shown.

[0060] The first air pipe valve component 112 is a one-way conducting component, for example, the first air pipe valve component 112 is a one-way valve or a controlled one-way conducting solenoid valve. Optionally, the first air pipe valve component 112 can be embedded in the first air collecting pipe 111. In addition, the first air pipe branch 113 is arranged on the side of the conducting outflow end of the first air pipe valve component 112 of the first air collecting pipe 111, and the second air pipe branch 114 and the third air pipe branch 115 are arranged on the side of the conducting inflow end of the first air pipe valve component 112 of the first air collecting pipe 111. In this way, the variable diversion type connection mode of each heat exchange branch in the first heat exchange module is realized.

[0061] Similarly, the second air pipe component 120 also includes a second air collecting pipe 121 and a second air pipe valve component 122 connected to the second air collecting pipe 121, wherein the fourth air pipe branch 123 is arranged on the side of the conduction outflow end of the second air pipe valve component 122 of the second air collecting pipe 121, and the fifth air pipe branch 124 and the sixth air pipe branch 125 are arranged on the side of the conduction inflow end of the second air pipe valve component 122 of the second air collecting pipe 121. Figure 3 shown.

[0062] The second air pipe valve component 122 is a one-way conducting component, for example, the second air pipe valve component 122 is a one-way valve or a controlled one-way conducting solenoid valve. Optionally, the second air pipe valve component 122 can be embedded in the second air collecting pipe 121. In addition, the fourth air pipe branch 123 is arranged on the side of the conduction outflow end of the second air pipe valve component 122 of the second air collecting pipe 121, and the fifth air pipe branch 124 and the sixth air pipe branch 125 are arranged on the side of the conduction inflow end of the second air pipe valve component 122 of the second air collecting pipe 121. In this way, the variable diversion type connection mode of each heat exchange branch in the second heat exchange module is realized.

[0063] Optionally, the first heat exchange tube group 210 includes a first heat exchange branch 211, a second heat exchange branch 212 and a third heat exchange branch 213, wherein the first heat exchange branch 211 is connected to the first air pipe branch 113, the second heat exchange branch 212 is connected to the second air pipe branch 114, and the third heat exchange branch 213 is connected to the third air pipe branch 115.

[0064] The first heat exchange tube group 210 includes three heat exchange branches respectively connected to the gas pipe branch, so that the first heat exchange tube group 210 presents three branches. It is understandable that the first heat exchange tube group 210 can also include more heat exchange branches, so that the first heat exchange tube group 210 presents more branches such as four, five, six, etc.

[0065] Similarly, the second heat exchange tube group 220 includes a fourth heat exchange branch 221, a fifth heat exchange branch 222 and a sixth heat exchange branch 223, wherein the fourth heat exchange branch 221 is connected to the fourth air pipe branch 123, the fifth heat exchange branch 222 is connected to the fifth air pipe branch 124, and the sixth heat exchange branch 223 is connected to the sixth air pipe branch 125.

[0066] The second heat exchange tube group 220 includes three heat exchange branches respectively connected to the gas pipe branch, so that the second heat exchange tube group 220 presents three branches. It is understandable that the second heat exchange tube group 220 can also include more heat exchange branches, so that the second heat exchange tube group 220 presents more branches such as four, five, six, etc.

[0067] The heat exchange tubes can also be used as resistance components to increase the flow resistance of the refrigerant. Optionally, the total number of heat exchange tubes in the first heat exchange module is less than the total number of heat exchange tubes in the second heat exchange module. In this way, the refrigerant flow resistance of the second heat exchange module is increased, thereby improving the refrigerant flow equalization effect of the first heat exchange module and the second heat exchange module.

[0068] Optionally, the variable split heat exchanger further includes an air collecting manifold 100 connected to the first air pipe component 110 and the second air pipe component 120 .

[0069] The gas collecting main pipe 100 is connected to the first gas pipe component 110 and the second gas pipe component 120. When the variable split heat exchanger is used as a condenser, the high-pressure gaseous refrigerant flowing out of the compressor is split in the gas collecting main pipe 100 and flows into the first gas pipe component 110 and the second gas pipe component 120 respectively. Optionally, the gas collecting main pipe 100 includes a first connecting position connected to the first gas pipe component 110, and a second connecting position connected to the second gas pipe component 120, wherein a bending section is provided between the first connecting position and the second connecting position, thereby increasing the flow resistance of the refrigerant flowing into the second heat exchange module, thereby balancing the flow equalization effect of the variable split heat exchanger. Optionally, the bending section includes a right-angle bending section, a U-shaped bending section, etc. Optionally, the distance between the bending section and the first connecting position is less than the distance between the bending section and the second connecting position.

[0070] Optionally, the first heat exchange module further includes a first liquid pipe component 310, the first liquid pipe component 310 includes a first liquid collecting pipe 311 and a first liquid pipe valve component 312 connected to the first liquid collecting pipe 311, and a first liquid pipe branch 313 and a second liquid pipe branch 314 are arranged on one side of the conduction outflow end of the first liquid pipe valve component 312 of the first liquid collecting pipe 311, and a third liquid pipe branch 315 is arranged on one side of the conduction inflow end of the first liquid pipe valve component 312 of the first liquid collecting pipe 311, wherein the first heat exchange branch 211 is connected to the first liquid pipe branch 313, the second heat exchange branch 212 is connected to the second liquid pipe branch 314, and the third heat exchange branch 213 is connected to the third liquid pipe branch 315. Figure 2 shown.

[0071] One end of the multiple heat exchange branches of the first heat exchange module is connected to the first air pipe component 110, and the other end of the multiple heat exchange branches is connected to the first liquid pipe component 310. The first liquid pipe component 310 is provided with a first liquid pipe valve component 312, and the first liquid pipe valve component 312 is a one-way conductive component, for example, the first liquid pipe valve component 312 is a one-way valve or a controlled one-way conductive solenoid valve. Due to the provision of the one-way conductive first air pipe valve component 112 and the first liquid pipe valve component 312, when the variable split heat exchanger is used as an evaporator, the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213 are connected in parallel, and the refrigerant flows through the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213, respectively. Figure 5 As shown; when the variable split heat exchanger is used as a condenser, the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213 are connected in series, and the refrigerant flows through the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213 in sequence, as shown Figure 4 shown.

[0072] Similarly, the second heat exchange module also includes a second liquid pipe component 320, which includes a second liquid collecting pipe 321 and a second liquid pipe valve component 322 connected to the second liquid collecting pipe 321, and a fourth liquid pipe branch 323 and a fifth liquid pipe branch 324 are arranged on one side of the conducting outflow end of the second liquid pipe valve component 322 of the second liquid collecting pipe 321, and a sixth liquid pipe branch 325 is arranged on one side of the conducting inflow end of the second liquid pipe valve component 322 of the second liquid collecting pipe 321, wherein the fourth heat exchange branch 221 is connected to the fourth liquid pipe branch 323, the fifth heat exchange branch 222 is connected to the fifth liquid pipe branch 324, and the sixth heat exchange branch 223 is connected to the sixth liquid pipe branch 325.

[0073] One end of the multiple heat exchange branches of the second heat exchange module is connected to the second air pipe component 120, and the other end of the multiple heat exchange branches is connected to the second liquid pipe component 320. The second liquid pipe component 320 is provided with a second liquid pipe valve component 322, and the second liquid pipe valve component 322 is a one-way conductive component, for example, the second liquid pipe valve component 322 is a one-way valve or a controlled one-way conductive solenoid valve. Due to the arrangement of the one-way conductive second air pipe valve component 122 and the second liquid pipe valve component 322, when the variable split heat exchanger is used as an evaporator, the fourth heat exchange branch 221, the fifth heat exchange branch 222 and the sixth heat exchange branch 223 are connected in parallel, and the refrigerant flows through the fourth heat exchange branch 221, the fifth heat exchange branch 222 and the sixth heat exchange branch 223, respectively. Figure 5 When the variable split heat exchanger is used as a condenser, the fourth heat exchange branch 221, the fifth heat exchange branch 222 and the sixth heat exchange branch 223 are connected in series, and the refrigerant flows through the fourth heat exchange branch 221, the fifth heat exchange branch 222 and the sixth heat exchange branch 223 in sequence, as shown in FIG. Figure 4 shown.

[0074] Optionally, the variable split heat exchanger further includes a subcooling tube group 230, which is disposed at the lower part of the second heat exchange module.

[0075] The subcooling tube group 230 is arranged at the lower part of the second heat exchange module. When the variable split heat exchanger is used as a condenser, the subcooling tube group 230 increases the subcooling degree of the refrigerant and improves the heat exchange effect of the variable split heat exchanger. Optionally, the number of heat exchange tubes of the subcooling tube group 230 is less than or equal to the number of heat exchange tubes of the first heat exchange module, and / or the number of heat exchange tubes of the subcooling tube group 230 is less than or equal to the number of heat exchange tubes of the second heat exchange module.

[0076] The disclosed embodiment also provides an air conditioning system, comprising the aforementioned variable split heat exchanger.

[0077] It can be understood that the aforementioned embodiments of the variable split heat exchanger and the effects achieved are applicable to air conditioning systems and will not be described in detail here.

[0078] The air conditioning system may be a large air conditioning system such as a commercial air conditioning system.

[0079] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A variable split flow heat exchanger, characterized in that: include: The first heat exchange module comprises a first heat exchange tube group and a first air pipe component connected to the first heat exchange tube group, and the first air pipe component comprises a first air pipe branch, a second air pipe branch and a third air pipe branch, and, The second heat exchange module is arranged at the lower part of the first heat exchange module, the second heat exchange module includes a second heat exchange tube group and a second air pipe component connected to the second heat exchange tube group, and the second air pipe component includes a fourth air pipe branch, a fifth air pipe branch and a sixth air pipe branch, The distance between the second tracheal branch and the third tracheal branch is H1, and the distance between the fifth tracheal branch and the sixth tracheal branch is H2, wherein H1<H2.

2. The variable split flow heat exchanger according to claim 1, characterized in that: The total height of the variable split heat exchanger is H. Among them, the difference between H2 and H1 is positively correlated with H.

3. The variable split heat exchanger according to claim 1, characterized in that: The number of the first heat exchange modules is n, Among them, n is positively correlated with H2.

4. The variable split flow heat exchanger according to claim 1, characterized in that: 2H1≤H2.

5. The variable split heat exchanger according to any one of claims 1 to 4, characterized in that: The first air pipe component also includes a first air collecting pipe and a first air pipe valve component connected to the first air collecting pipe, wherein the first air pipe branch pipe is arranged on the side of the conduction outflow end of the first air pipe valve component of the first air collecting pipe, and the second air pipe branch pipe and the third air pipe branch pipe are arranged on the side of the conduction inflow end of the first air pipe valve component of the first air collecting pipe; The second air pipe component also includes a second air collecting pipe and a second air pipe valve component connected to the second air collecting pipe, wherein the fourth air pipe branch is arranged on the side of the conduction outflow end of the second air pipe valve component of the second air collecting pipe, and the fifth air pipe branch and the sixth air pipe branch are arranged on the side of the conduction inflow end of the second air pipe valve component of the second air collecting pipe.

6. The variable split heat exchanger according to claim 5, 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, wherein the first heat exchange branch is connected to the first air pipe branch, the second heat exchange branch is connected to the second air pipe branch, and the third heat exchange branch is connected to the third air pipe branch; The second heat exchange tube group includes a fourth heat exchange branch, a fifth heat exchange branch and a sixth heat exchange branch, wherein the fourth heat exchange branch is connected to the fourth air pipe branch, the fifth heat exchange branch is connected to the fifth air pipe branch, and the sixth heat exchange branch is connected to the sixth air pipe branch.

7. The variable split heat exchanger according to claim 6, characterized in that: Also includes: The gas collecting main pipe is connected with the first gas pipe component and the second gas pipe component.

8. The variable split heat exchanger according to claim 7, characterized in that: The first heat exchange module further includes a first liquid pipe component, the first liquid pipe component includes a first liquid collecting pipe and a first liquid pipe valve component connected to the first liquid collecting pipe, and a first liquid pipe branch and a second liquid pipe branch are arranged on one side of a conduction outflow end of the first liquid pipe valve component of the first liquid collecting pipe, and a third liquid pipe branch is arranged on one side of a conduction inflow end of the first liquid pipe valve component of the first liquid collecting pipe, wherein the first heat exchange branch is connected to the first liquid pipe branch, the second heat exchange branch is connected to the second liquid pipe branch, and the third heat exchange branch is connected to the third liquid pipe branch; The second heat exchange module also includes a second liquid pipe component, which includes a second liquid collecting pipe and a second liquid pipe valve component connected to the second liquid collecting pipe, and a fourth liquid pipe branch and a fifth liquid pipe branch are arranged on one side of the conduction outflow end of the second liquid pipe valve component of the second liquid collecting pipe, and a sixth liquid pipe branch is arranged on one side of the conduction inflow end of the second liquid pipe valve component of the second liquid collecting pipe, wherein the fourth heat exchange branch is connected to the fourth liquid pipe branch, the fifth heat exchange branch is connected to the fifth liquid pipe branch, and the sixth heat exchange branch is connected to the sixth liquid pipe branch.

9. The variable split heat exchanger according to claim 8, characterized in that: Also includes: The subcooling tube group is arranged at the lower part of the second heat exchange module.

10. An air conditioning system, characterized in that: It comprises the variable split heat exchanger as claimed in any one of claims 1 to 9.

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