Variable shunting heat exchanger and air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, and discloses a variable shunting heat exchanger and an air conditioning system. The variable split-flow heat exchanger comprises a first heat exchange module, and the first heat exchange module comprises a first heat exchange branch set comprising a plurality of heat exchange branches; the first flow path switching assembly communicates with the multiple heat exchange branches of the first heat exchange branch set and is used for switching the communication modes of the multiple heat exchange branches of the first heat exchange branch set in different operation modes; the first liquid pipe structure communicates with the multiple heat exchange branches of the first heat exchange branch set, the first liquid pipe structure comprises a first liquid inlet position used for liquid inlet and a first liquid separation position close to the first liquid inlet position, a first dispersing element is arranged between the first liquid inlet position and the first liquid separation position, and a second dispersing element is arranged between the first liquid inlet position and the first liquid separation position; the first dispersing element is used for dispersing the refrigerant flowing in from the first liquid inlet position. According to the variable flow division heat exchanger, the stability of the amount of the refrigerant flowing into the first liquid inlet position is improved.

Description

Technical Field

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

[0002] The heat exchanger is an important component of an air conditioning system. For example, in a split air conditioning system, the outdoor heat exchanger is used to exchange heat or cold with the external environment, and the indoor heat exchanger is used to send heat or cold to the indoor space of the user to achieve cooling or heating of the indoor space.

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

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

[0005] When the existing variable flow-dividing heat exchanger acts as an evaporator, the amount of refrigerant flowing out from the liquid distribution position of the header is unstable, which in turn leads to unstable heat exchange capacity of the heat exchanger.

[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 therefore 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] 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 elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

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

[0009] An embodiment of the present disclosure provides a variable flow-dividing heat exchanger, including a first heat exchange module. The first heat exchange module includes: a first heat exchange branch group, including a plurality of heat exchange branches; a first flow path switching component, connected to one ends of the plurality of heat exchange branches of the first heat exchange branch group, for switching the connection mode of the plurality of heat exchange branches of the first heat exchange branch group in different operating modes; a first liquid pipe structure, connected to the plurality of heat exchange branches of the first heat exchange branch group. The first liquid pipe structure includes a first liquid inlet position for liquid inlet and a first liquid distribution position close to the first liquid inlet position. A first discrete element is arranged between the first liquid inlet position and the first liquid distribution position, and the first discrete element is used for dispersing the refrigerant flowing in from the first liquid inlet position.

[0010] In some alternative embodiments, the first discrete element includes a filter screen.

[0011] In some alternative embodiments, the filter screen includes: a first mesh part, connected to the inner wall of the first liquid pipe structure; and a second mesh part, connected to the first mesh part and covering the first mesh part.

[0012] In some alternative embodiments, a hollow part is arranged between the first mesh part and the second mesh part.

[0013] In some alternative embodiments, the aperture of at least part of the mesh holes of the second mesh part is smaller than the aperture of the mesh holes of the first mesh part.

[0014] In some alternative embodiments, the first heat exchange module further includes a first gas pipe structure, connected to the other ends of the plurality of heat exchange branches of the first heat exchange branch group; the first flow path switching component includes a first gas pipe valve component connected to the first gas pipe structure and a first liquid pipe valve component connected to the first liquid pipe structure. The first gas pipe structure includes a first upper gas pipe on the side of the gas valve conduction outflow end of the first gas pipe valve component and a first lower gas pipe on the side of the gas valve conduction inflow end of the first gas pipe valve component. The first liquid pipe structure includes a first upper liquid pipe on the side of the liquid valve conduction outflow end of the first liquid pipe valve component and a first lower liquid pipe on the side of the liquid valve conduction inflow end of the first liquid pipe valve component; the first heat exchange branch group includes a first heat exchange branch, a second heat exchange branch, a third heat exchange branch, and a fourth heat exchange branch. One ends of the third heat exchange branch and the fourth heat exchange branch are both connected to the first upper gas pipe. After the other ends of the third heat exchange branch and the fourth heat exchange branch converge through a first three-way valve, they are connected to the first upper liquid pipe. One end of the second heat exchange branch is connected to the first lower gas pipe, and the other end is connected to the first upper liquid pipe. One end of the first heat exchange branch is connected to the first lower gas pipe, and the other end is connected to the first liquid distribution position of the first lower liquid pipe.

[0015] In some alternative embodiments, the variable flow splitting heat exchanger further includes a liquid distribution element, which is connected to the first liquid pipe structure and is used to distribute the refrigerant to the first liquid pipe structure. Moreover, the first liquid pipe structure is provided with a first liquid distribution communication pipe connected to the liquid distribution element. The first liquid distribution communication pipe includes a first liquid inlet pipe section connected to the first liquid inlet position of the first liquid pipe structure, wherein the first liquid inlet pipe section is arranged on the side wall of the first liquid pipe structure.

[0016] In some alternative embodiments, it further includes a second heat exchange module, which is arranged below the first heat exchange module. Among them, the second heat exchange module includes: a second heat exchange branch group, which includes multiple heat exchange branches; a second flow path switching component, which is connected to the multiple heat exchange branches of the second heat exchange branch group and is used to switch the connection mode of the multiple heat exchange branches of the second heat exchange branch group in different operating modes; a second liquid pipe structure, which is connected to the multiple heat exchange branches of the second heat exchange branch group. The second liquid pipe structure includes a second liquid inlet position for liquid inlet and a second liquid distribution position close to the second liquid inlet position. Among them, a second discrete element is arranged between the second liquid inlet position and the second liquid distribution position, and the second discrete element is used to disperse the refrigerant flowing in from the second liquid inlet position.

[0017] In some alternative embodiments, the distance between the first discrete element and the first liquid inlet position is a first distance L1, and the distance between the second discrete element and the second liquid inlet position is a first distance L2, wherein L1 ≤ L2.

[0018] In some alternative embodiments, the second liquid pipe structure is provided with a second liquid distribution communication pipe connected to the liquid distribution element. The second liquid distribution communication pipe includes a second liquid inlet pipe section connected to the second liquid pipe structure, and the second liquid inlet pipe section is arranged on the side wall of the second liquid pipe structure. Among them, the second liquid inlet pipe section is provided with a first resistance pipe section for increasing the flow resistance of the refrigerant.

[0019] In some alternative embodiments, the first resistance pipe section includes a bent pipe section or an inclined pipe section.

[0020] The embodiments of the present disclosure further provide an air conditioning system, which includes the variable flow splitting heat exchanger as described above.

[0021] The variable flow splitting heat exchanger and the air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0022] The variable flow - dividing heat exchanger provided by the embodiments of the present disclosure includes a first heat - exchange module. The first heat - exchange module includes a first heat - exchange branch group, a first flow - path switching component, and a first liquid - pipe structure. The first flow - path switching component enables the connection mode of multiple heat - exchange branches in the first heat - exchange branch group to be switched or adjusted according to the operating mode of the air - conditioning system. The first liquid - pipe structure is provided with a first liquid - inlet position for liquid inlet and a first liquid - dividing position close to the first liquid - inlet position, and a first discrete element is arranged between the first liquid - inlet position and the first liquid - dividing position. The first discrete element is used for dispersing and mixing the refrigerant flowing in from the first liquid - inlet position and then flowing out through the first liquid - dividing position.

[0023] It can be seen that the setting of the first discrete element improves the gas - liquid mixing degree of the refrigerant flowing into the first liquid - pipe structure from the first liquid - inlet position, thereby improving the stability of the amount of refrigerant flowing into the first liquid - dividing position and enhancing the heat - exchange stability of the variable flow - dividing heat exchanger.

[0024] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations 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:

[0026] Figure 1 is a schematic structural diagram of a variable flow - dividing heat exchanger provided by the embodiments of the present disclosure;

[0027] Figure 2 is a schematic structural diagram of a first heat - exchange module provided by the embodiments of the present disclosure;

[0028] Figure 3 is a schematic diagram of the refrigerant flow when the first heat - exchange module serves as a condenser provided by the embodiments of the present disclosure;

[0029] Figure 4 is a schematic diagram of the refrigerant flow when the first heat - exchange module serves as an evaporator provided by the embodiments of the present disclosure;

[0030] Figure 5 is a schematic structural diagram of another variable flow - dividing heat exchanger provided by the embodiments of the present disclosure;

[0031] Figure 6 is a schematic structural diagram of a filter provided by the embodiments of the present disclosure;

[0032] Figure 7 is a schematic structural diagram of another filter provided by the embodiments of the present disclosure;

[0033] Figure 8 It is a schematic structural diagram of a first air pipe valve component provided by an embodiment of the present disclosure;

[0034] Figure 9 It is a schematic structural diagram of another first air pipe valve component provided by an embodiment of the present disclosure;

[0035] Figure 10 It is a schematic structural diagram of another first air pipe valve component provided by an embodiment of the present disclosure.

[0036] Reference numerals:

[0037] 1: Gas collecting main pipe; 11: First distribution branch pipe or first distribution port; 12: Second distribution branch pipe or second distribution port; 13: Third distribution branch pipe or third distribution port;

[0038] 211: First upper air pipe; 212: First lower air pipe; 213: First air pipe valve component;

[0039] 221: First upper liquid pipe; 222: First lower liquid pipe; 223: First liquid pipe valve component; 224: First liquid inlet pipe section; 225: First liquid distribution pipe section; 226: First discrete element; 2261: First mesh part; 2262: Second mesh part;

[0040] 231: Second upper air pipe; 232: Second lower air pipe; 233: Second air pipe valve component;

[0041] 241: Second upper liquid pipe; 242: Second lower liquid pipe; 243: Second liquid pipe valve component; 244: Second liquid inlet pipe section; 2441: First resistance pipe section; 245: Second liquid distribution pipe section; 246: Second discrete element;

[0042] 300: First heat exchange branch group; 301: First heat exchange branch; 302: Second heat exchange branch; 303: Third heat exchange branch; 304: Fourth heat exchange branch;

[0043] 311: First liquid distribution position; 321: First three-way branch pipe; 322: Second three-way branch pipe;

[0044] 4: Liquid distribution element;

[0045] 501: Valve seat; 502: Communication hole; 503: Valve housing; 504: Valve core; 505: Guide rail; 506: Fixed seat; 507: Cantilever. Detailed implementation manners

[0046] In order 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 attached drawings are only for reference and explanation, 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 provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other instances, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0047] In the embodiments of the present disclosure, the terms "first", "second", etc. in the description and claims of the embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present disclosure herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0048] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. 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 an 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.

[0049] In addition, the terms "arranged", "connected", "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.

[0050] Unless otherwise specified, the term "plurality" means two or more.

[0051] The term "and / or" is a description of the associated relationship of 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.

[0052] 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.

[0053] An embodiment of the present disclosure provides a variable flow-dividing heat exchanger.

[0054] Optionally, the variable flow-dividing heat exchanger includes a first heat exchange module, and the first heat exchange module includes a first heat exchange branch group 300, a first flow path switching component, and a first liquid pipe structure. The first heat exchange branch group 300 includes multiple heat exchange branches; the first flow path switching component is connected to the multiple heat exchange branches of the first heat exchange branch group 300 and is used to switch the connection mode of the multiple heat exchange branches of the first heat exchange branch group 300 in different operating modes; the first liquid pipe structure is connected to the multiple heat exchange branches of the first heat exchange branch group 300, and the first liquid pipe structure includes a first liquid inlet position for liquid inlet and a first liquid distribution position 311 close to the first liquid inlet position. Wherein, a first discrete element 226 is arranged between the first liquid inlet position and the first liquid distribution position 311, and the first discrete element 226 is used to disperse the refrigerant flowing in from the first liquid inlet position.

[0055] The first flow path switching component is used to switch the connection mode of different heat exchange branches in the first heat exchange branch group 300 in different operating modes, and the first flow path switching component can form different connection modes between different heat exchange branches. In this way, the first flow path switching component enables the variable flow-dividing heat exchanger to have an optimal flow path in different operating modes, improving the heat exchange efficiency of the variable flow-dividing heat exchanger. For example, when the variable flow-dividing heat exchanger is used as an evaporator, the first flow path switching component connects the multiple heat exchange branches in the first heat exchange branch group 300 in parallel; when the variable flow-dividing heat exchanger is used as a condenser, the first flow path switching component connects at least some of the heat exchange branches in the first heat exchange branch group 300 in series.

[0056] Optionally, the first flow path switching component can be a valve component with a one-way conduction function, or a combination of a valve component with a one-way conduction function and a pipe component. For example, the first flow path switching component 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 valve 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.

[0057] When the variable flow-dividing heat exchanger is used as an evaporator, the refrigerant flows into the first heat exchange branch group 300 from the first liquid inlet position of the first liquid pipe structure. At this time, the refrigerant flowing into the first heat exchange branch group 300 is in a gas-liquid two-phase state. During the flow of the gas-liquid two-phase refrigerant, due to the action of flow pressure, upward flow impulse, centrifugal force in the flow path, etc., the gas-liquid two-phase refrigerant is not evenly mixed, resulting in unstable refrigerant flow rate flowing out from the liquid distribution position of the first liquid pipe structure, especially the refrigerant flow rate flowing out from the first liquid distribution position 311 closest to the first liquid inlet position is the most unstable. In this way, the heat exchange stability of the variable flow-dividing heat exchanger is reduced.

[0058] In the variable flow-dividing heat exchanger provided by the embodiments of the present disclosure, a first discrete element 226 is arranged between the first liquid inlet position and the first liquid dividing position 311 of the first liquid pipe structure. The first discrete element 226 can disperse and mix the refrigerant flowing in from the first liquid inlet position, and then flow into a heat exchange branch through the first liquid dividing position 311. In this way, the gas-liquid mixing degree of the refrigerant flowing into the heat exchange branch is improved, and further, the stability of the amount of the refrigerant flowing into the heat exchange branch is improved.

[0059] Optionally, the first liquid inlet position is an inlet or an inlet branch pipe arranged on the first liquid pipe structure, and the first liquid outlet position is an outlet or an outlet branch pipe arranged on the first liquid pipe structure.

[0060] Optionally, the first discrete element 226 includes a filter screen. The gas-liquid two-phase refrigerant flowing through it is dispersed through the mesh holes of the filter screen, improving the uniformity of the refrigerant mixing. Optionally, the material of the filter screen can be nylon or metal.

[0061] Optionally, the filter screen includes a first mesh part 2261 and a second mesh part 2262. The first mesh part 2261 is connected to the inner wall of the first liquid pipe structure; the second mesh part 2262 is connected to the first mesh part 2261 and covers the first mesh part 2261.

[0062] It can be understood that at least part of the second mesh part 2262 is not connected to the inner wall of the first liquid pipe structure, or all the outer edges of the second mesh part 2262 are not connected to the inner wall of the first liquid pipe structure. In this way, the mixing effect of the filter screen on the gas-liquid two-phase refrigerant is improved. Optionally, the first mesh part 2261 is a horizontal mesh, as shown in A in Figure 7 The shape of the second mesh part 2262 includes an arc A, an inverted basin shape B, an inverted included angle shape C or an irregular shape, as shown in Figure 6 shown.

[0063] Optionally, a hollow part is arranged between the first mesh part 2261 and the second mesh part 2262. The arrangement of the hollow part reduces the pressure loss of the refrigerant flow while the first mesh part 2261 and the second mesh part 2262 play a mixing role at the same time.

[0064] Optionally, the aperture diameter of at least part of the mesh holes of the second mesh part 2262 is smaller than that of the mesh holes of the first mesh part 2261. For the filter mesh structure where the second mesh part 2262 communicates with the upper part of the first mesh part 2261, when the refrigerant flows through the second mesh part 2262, since the area of the second mesh part 2262 is larger than that of the first mesh part 2261, the second mesh part 2262 has a greater effect on the mixing flow of the refrigerant, and part of the refrigerant will form a partial backflow at the second mesh part 2262. The aperture diameter of at least part of the mesh holes of the second mesh part 2262 is smaller than that of the mesh holes of the first mesh part 2261, or the aperture diameters of all the mesh holes of the second mesh part 2262 are smaller than those of the mesh holes of the first mesh part 2261. In this way, the mixing effect of the filter mesh on the refrigerant is further improved.

[0065] Optionally, the first heat exchange module further includes a first gas pipe structure. The first flow path switching component includes a first gas pipe valve member 213 connected to the first gas pipe structure, and a first liquid pipe valve member 223 connected to the first liquid pipe structure. The first gas pipe structure includes a first upper gas pipe 211 on the side of the gas valve conducting outlet end of the first gas pipe valve member 213, and a first lower gas pipe 212 on the side of the gas valve conducting inlet end of the first gas pipe valve member 213. The first liquid pipe structure includes a first upper liquid pipe 221 on the side of the liquid valve conducting outlet end of the first liquid pipe valve member 223, and a first lower liquid pipe 222 on the side of the liquid valve conducting inlet end of the first liquid pipe valve member 223. The first heat exchange branch group 300 includes a first heat exchange branch 301, a second heat exchange branch 302, a third heat exchange branch 303, and a fourth heat exchange branch 304. Among them, one ends of the third heat exchange branch 303 and the fourth heat exchange branch 304 are both connected to the first upper gas pipe 211, and after the other ends of the third heat exchange branch 303 and the fourth heat exchange branch 304 converge through a first three-way valve, they are connected to the first upper liquid pipe 221. One end of the second heat exchange branch 302 is connected to the first lower gas pipe 212, and the other end is connected to the first upper liquid pipe 221. One end of the first heat exchange branch 301 is connected to the first lower gas pipe 212, and the other end is connected to the first liquid distribution position 311 of the first lower liquid pipe 222.

[0066] The first heat exchange branch group 300 includes a first heat exchange branch 301, a second heat exchange branch 302, a third heat exchange branch 303, and a fourth heat exchange branch 304. The first gas pipe valve member 213 is a one-way conduction member, and its conduction direction is from the first lower gas pipe 212 to the first upper gas pipe 211. The first liquid pipe valve member 223 is also a one-way conduction member, and its conduction direction is from the first lower liquid pipe 222 to the first upper liquid pipe 221. In this way, the first heat exchange module has a variable shunt connection mode.

[0067] When the first heat exchange module is used as an evaporator, the first liquid pipe valve component 223 and the first gas pipe valve component 213 are connected, and the first heat exchange branch 301, the second heat exchange branch 302, the third heat exchange branch 303 and the fourth heat exchange branch 304 are connected in parallel. Figure 4 As shown; when the first heat exchange module is used as a condenser, the first liquid pipe valve component 223 and the first gas pipe valve component 213 are closed, the fourth heat exchange branch 304 is connected in parallel with the third heat exchange branch 303, and then connected in series with the second heat exchange branch 302 and the first heat exchange branch 301 in sequence, as shown Figure 3 shown.

[0068] Optionally, the third heat exchange branch 303 and the fourth heat exchange branch 304 are connected through a transversely arranged Y-shaped three-way structure, the first three-way branch pipe 321 of the Y-shaped three-way structure is in communication with the fourth heat exchange branch 304, the second three-way branch pipe 322 is in communication with the third heat exchange branch 303, and the first three-way branch pipe 321 is arranged on the upper part of the second three-way branch pipe 322. Therefore, under the action of gravity, the refrigerant is more distributed to the third heat exchange branch 303 located at the lower part.

[0069] Optionally, the variable flow split heat exchanger further includes a liquid separation element 4. The liquid separation element 4 is connected to the first liquid pipe structure, and is used to distribute refrigerant to the first liquid pipe structure, and the first liquid pipe structure is provided with a first liquid separation connecting pipe connected to the liquid separation element 4, and the first liquid separation connecting pipe includes a first liquid inlet pipe section 224 connected to the first liquid inlet position of the first liquid pipe structure, wherein the first liquid inlet pipe section 224 is provided on the side wall of the first liquid pipe structure.

[0070] When multiple heat exchange branches of the variable split heat exchanger are connected in parallel, the amount of refrigerant distributed between different heat exchange branches is prone to uneven distribution. If the first liquid inlet pipe section 224 is set at the bottom of the first liquid pipe structure, the gas-liquid two-phase refrigerant entering from the bottom has multiple factors such as upward impulse, flow pressure, and gravity during the flow process, which makes the first liquid pipe structure unevenly distribute the refrigerant between different heat exchange branches, and even under the same operating load, the amount of refrigerant distributed to the same heat exchange branch twice is different.

[0071] In the heat exchanger provided in the embodiment of the present disclosure, the first liquid inlet pipe section 224 is arranged on the side of the first liquid pipe structure, so that the refrigerant distributed from the liquid separation element 4 can enter the first liquid pipe structure from the side, thereby improving the uniformity of the refrigerant distribution of the first liquid pipe structure to the heat exchange branch.

[0072] Optionally, the variable flow split heat exchanger further includes a second heat exchange module disposed below the first heat exchange module. The second heat exchange module includes a second heat exchange branch group, a second flow path switching component, and a second liquid pipe structure. The second heat exchange branch group includes a plurality of heat exchange branches; the second flow path switching component is connected to the plurality of heat exchange branches of the second heat exchange branch group and is configured to switch the connection mode of the plurality of heat exchange branches of the second heat exchange branch group in different operating modes; the second liquid pipe structure is connected to the plurality of heat exchange branches of the second heat exchange branch group. The second liquid pipe structure includes a second liquid inlet position for inlet liquid and a second liquid distribution position close to the second liquid inlet position. A second discrete element 246 is disposed between the second liquid inlet position and the second liquid distribution position, and the second discrete element 246 is configured to disperse the refrigerant flowing in from the second liquid inlet position.

[0073] Optionally, the structure of the second heat exchange module is exactly the same as that of the first heat exchange module. In this way, the heat exchanger can be modularized standardly, and different numbers of heat exchange modules can be configured according to the operating requirements of the air conditioning system.

[0074] Similarly, the second flow path switching component includes a second liquid pipe valve component 243 connected to the second liquid pipe structure. The second liquid pipe structure includes a second upper liquid pipe 241 on the side of the liquid valve conduction outlet end of the second liquid pipe valve component 243 and a second lower liquid pipe 242 on the side of the liquid valve conduction inlet end of the second liquid pipe valve component 243. The second flow path switching component includes a second gas pipe valve component 233 connected to the second gas pipe structure. The second gas pipe structure includes a second upper gas pipe 231 on the side of the gas valve conduction outlet end of the second gas pipe valve component 233 and a second lower gas pipe 232 on the side of the gas valve conduction inlet end of the second gas pipe valve component 233. The second heat exchange branch group also includes four heat exchange branches. Under the setting of the second flow path switching component, the connection mode of each heat exchange branch in the second heat exchange branch group is the same as that of the heat exchange branches of the first heat exchange branch group 300, which will not be elaborated here.

[0075] Similarly, a second discrete element 246 is disposed in the second liquid pipe structure of the second heat exchange module. The second discrete element 246 mixes the gas-liquid two-phase refrigerant flowing in from the second liquid inlet position, improves the mixing degree of the gas-liquid two-phase refrigerant, and further improves the stability of the amount of refrigerant flowing into the second liquid distribution position.

[0076] Optionally, the distance between the first discrete element 226 and the first liquid inlet position is a first distance L1, and the distance between the second discrete element 246 and the second liquid inlet position is a first distance L2, where L1 ≤ L2.

[0077] Compared with the second heat exchange module, the first heat exchange module is at a higher height. The refrigerant flowing out of the liquid distribution element 4 needs to flow upward for a relatively long vertical distance to reach the first liquid inlet position. In this way, the separation degree of the refrigerant in the gas-liquid two-phase state at the first liquid inlet position is greater. In the embodiment of the present disclosure, the distance between the first discrete element 226 and the first liquid inlet position is the first distance L1, which is relatively small. In this way, the degree of dispersion and mixing of the refrigerant at the first liquid inlet position by the first discrete element 226 is improved.

[0078] Optionally, the second liquid pipe structure is provided with a second liquid distribution communication pipe communicating with the liquid distribution element 4. The second liquid distribution communication pipe includes a second liquid inlet pipe section 244 connected to the second liquid pipe structure, and the second liquid inlet pipe section 244 is arranged on the side wall of the second liquid pipe structure. Among them, the second liquid inlet pipe section 244 is provided with a first resistance pipe section 2441 for increasing the flow resistance of the refrigerant.

[0079] Optionally, the second heat exchange module is arranged below the first heat exchange module, and the second liquid inlet pipe section 244 is provided with a first resistance pipe section 2441 for increasing the flow resistance of the refrigerant. As Figure 5 shown. Compared with the first heat exchange module, the second heat exchange module is arranged below, and the amount of refrigerant distributed by the liquid distribution element 4 is relatively large. Then, the amount of refrigerant distributed to the first heat exchange module located above is relatively small. In the embodiment of the present disclosure, the second liquid inlet pipe section 244 is provided with a first resistance pipe section 2441, which increases the flow resistance of the refrigerant flowing out of the liquid distribution element 4 when entering the second heat exchange module. Then, more refrigerant can be distributed to the first heat exchange module, thereby increasing the uniformity of the refrigerant distribution of the entire heat exchanger and improving the heat exchange effect of the heat exchanger. The first resistance pipe section 2441 includes a bent pipe section or an inclined pipe section. Further, the resistance of the first resistance pipe section 2441 can be adjusted by increasing the number of bends of the bent pipe section, setting the inclination angle of the inclined pipe section, etc.

[0080] The embodiment of the present disclosure further provides a structure of a first gas pipe valve component 213. Optionally, the structures of the first liquid pipe valve component 223, the second gas pipe valve component 233, and the second liquid pipe valve component 243 are the same as the structure of the first gas pipe valve component 213.

[0081] The first gas pipe valve component 213 includes a valve seat 501 and a valve housing 503. The valve seat 501 is located in the first gas pipe structure, and the valve seat 501 is configured with a communication hole 502, and the communication hole 502 can communicate the first upper gas pipe 211 and the first lower gas pipe 212; the valve housing 503 is located on the side of the valve seat 501 facing the first upper gas pipe 211 and is movably located at the communication hole 502. The maximum cross-sectional area of the valve seat 501 is larger than the cross-sectional area of the communication hole 502, and is used to open or close the communication hole 502.

[0082] In the embodiments of the present disclosure, the valve seat 501 of the first air pipe valve component 213 is located within the first air pipe structure, and the valve seat 501 is connected to the side wall of the first air pipe structure. In this way, the valve seat 501 isolates the first air pipe structure into a first upper air pipe 211 and a first lower air pipe 212. The valve seat 501 is provided with a communication hole 502, and the valve housing 503 is movably disposed at the communication hole 502, and the valve housing 503 is located on the side of the valve seat 501 facing the first upper air pipe 211. In this way, when the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the valve housing 503 moves to and blocks the communication hole 502. That is, when the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the first air pipe valve component 213 is closed. When the refrigerant flows from the first lower air pipe 212 into the first upper air pipe 211, the refrigerant pushes the valve housing 503, causing the valve housing 503 to move in a direction away from the valve seat 501, thereby opening the communication hole 502. That is, when the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the first air pipe valve component 213 is conducted. In this way, the one-way conduction of the first air pipe valve component 213 is achieved.

[0083] Optionally, the wall surface of the valve housing facing the communication hole matches the wall surface of the communication hole. In this way, when the valve housing closes the communication hole, the valve housing can closely adhere to the side wall of the communication hole to achieve sealing. Optionally, one end of the valve housing 503 facing the valve seat 501 is a conical surface. When the valve housing 503 closes the communication hole 502, the conical surface of the valve housing 503 fits with the side wall of the communication hole 502, so as to seal the connection between the valve housing 503 and the communication hole 502 and prevent refrigerant leakage.

[0084] Optionally, the first air pipe valve component 213 further includes a valve core 504 and a guide rail 505. The valve core 504 is connected to the valve housing 503; the guide rail 505 is connected to the first air pipe structure, and the guide rail 505 is fixedly disposed on the side of the communication hole 502 facing the first upper air pipe 211 and extends along the axial direction of the first air pipe structure. The valve core 504 is movably disposed on the guide rail 505; wherein, when the valve core 504 moves along the guide rail towards the communication hole 502, the valve housing 503 abuts against the valve seat 501 to close the communication hole 502, and when the valve core 504 moves along the guide rail away from the communication hole 502, the valve housing 503 separates from the valve seat 501 to open the communication hole 502.

[0085] In the disclosed embodiment, the valve core 504 is connected to the valve housing 503, the valve core 504 can drive the valve housing 503 to move, the guide rail 505 is fixed on one side of the connecting hole 502, and the valve core 504 can move along the guide rail 505, that is, the guide rail 505 guides the movement of the valve housing 503. When the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the refrigerant applies force to the valve core 504, so that the valve core 504 and the valve housing 503 move along the guide rail 505 toward the direction close to the valve seat 501, thereby making the valve housing 503 abut against the valve seat 501 and closing the connecting hole 502. Figure 9 As shown, when the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the refrigerant exerts force on the valve shell 503 and the valve core 504 to make the valve core 504 move away from the valve seat 501, so that the valve shell 503 is separated from the valve seat 501, and then the connecting hole 502 is opened to realize the one-way conduction of the first air pipe valve component 213. Figure 9 The middle arrow indicates the flow direction of the refrigerant when the first air pipe valve component 213 is turned on. In addition, the guide rail 505 can also limit the left and right movement of the valve housing 503 to prevent the valve housing 503 from hitting the first air pipe structure to produce a knocking sound.

[0086] Optionally, the valve core 504 is located at the center of the valve housing 503 , and the guide rail 505 is arranged corresponding to the valve core 504 , so that the movement of the valve housing 503 is more stable and the valve housing 503 is prevented from being offset.

[0087] Optionally, the first air pipe valve component 213 further includes a fixing seat 506 , which is connected to the first air pipe structure, located on a side of the guide rail 505 away from the valve seat 501 , and connected to the guide rail 505 for fixing the guide rail 505 .

[0088] In the disclosed embodiment, the fixing seat 506 is connected to the first air pipe structure, so that the fixing seat 506 can fix the guide rail 505 to keep the guide rail 505 fixed, so as to facilitate the movement of the valve core 504 along the guide rail 505.

[0089] Alternatively, if Figure 10 As shown, the fixed seat 506 includes a plurality of cantilevers 507, the inner ends of the plurality of cantilevers 507 are connected, the outer ends of the cantilevers 507 are connected to the side walls of the collecting pipe, and the plurality of cantilevers 507 are arranged at intervals along the circumference of the first air pipe structure, so that the fixed seat 506 can be fixed, and the plurality of cantilevers 507 are arranged at intervals, and the fixed seat will not block the flow of the refrigerant.

[0090] Optionally, the first upper air pipe 211 is located above the first lower air pipe 212, the valve housing 503 is located above the valve seat 501, the guide rail 505 extends in the up-down direction, and the fixing seat 506 is located above the valve housing 503. In this way, when the refrigerant flows from the first upper air pipe 211 to the first lower air pipe 212, the valve housing 503 will naturally close the connecting hole 502 under its own gravity, and the pressure applied by the refrigerant will increase the reverse sealing performance. When the refrigerant flows from the first lower air pipe 212 to the first upper air pipe 211, the upward impact force of the refrigerant is greater than the gravity of the valve housing 503, and the valve housing 503 will be lifted up and opened, thereby realizing the normal flow of the refrigerant.

[0091] Optionally, the heat exchanger further includes a third heat exchange module, and the third heat exchange module is arranged below the second heat exchange module.

[0092] Optionally, the heat exchanger further includes a gas collecting main pipe 1, a first distribution branch pipe 11 connecting the gas collecting main pipe 1 and the first heat exchange module, a second distribution branch pipe 12 connecting the gas collecting main pipe 1 and the second heat exchange module, and a third distribution branch pipe 13 connecting the gas collecting main pipe 1 and the third heat exchange module. In this way, the refrigerant is distributed to the three heat exchange modules through the three distribution branches. Figure 5 shown.

[0093] The embodiment of the present disclosure also provides an air conditioning system, comprising the heat exchanger as described above.

[0094] Optionally, the air conditioning system provided by the embodiment of the present disclosure may be a larger commercial air conditioning system.

[0095] For household air conditioners, since the number of heat exchange tubes in the heat exchanger is small, it is relatively easy to achieve uniform flow distribution between each heat exchange branch. However, for large air conditioning systems with a large number of heat exchange tubes, when the existing variable flow distribution form is used to divide the heat exchange branches of the heat exchanger, the refrigerant distribution between the heat exchange branches is prone to uneven and unstable.

[0096] In the air-conditioning system provided by the embodiment of the present disclosure, a larger heat exchanger is divided into heat exchange modules, which improves the uniformity and stability of the refrigerant distribution between each heat exchange branch, thereby improving the heat exchange capacity of the heat exchanger and improving the cooling and heating capabilities of the air-conditioning system.

[0097] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling 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. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The 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 variable split flow heat exchanger, characterized in that: The invention comprises a first heat exchange module, wherein the first heat exchange module comprises: A first heat exchange branch group, comprising a plurality of heat exchange branches; A first flow path switching component is connected to one end of the multiple heat exchange branches of the first heat exchange branch group, and is used to switch the connection mode of the multiple heat exchange branches of the first heat exchange branch group under different operation modes; The first liquid pipe structure is connected to the plurality of heat exchange branches of the first heat exchange branch group, and the first liquid pipe structure includes a first liquid inlet position for liquid inlet, and a first liquid separation position close to the first liquid inlet position. A first discrete element is provided between the first liquid inlet position and the first liquid separation position, and the first discrete element is used to disperse the refrigerant flowing in from the first liquid inlet position.

2. The variable split flow heat exchanger according to claim 1, characterized in that: The first discrete element includes a filter screen.

3. The variable split flow heat exchanger according to claim 2, characterized in that: The filter includes: A first net portion connected to an inner wall of the first liquid pipe structure; and, The second net part is connected to the first net part and covers the first net part.

4. The variable split flow heat exchanger according to claim 3, characterized in that: A hollow portion is provided between the first net portion and the second net portion.

5. The variable split flow heat exchanger according to claim 3, characterized in that: The aperture size of at least some of the meshes of the second net part is smaller than the aperture size of the meshes of the first net part.

6. The variable split heat exchanger according to claim 1, characterized in that: The first heat exchange module also includes a first air pipe structure connected to the other end of the plurality of heat exchange branches of the first heat exchange branch group; The first flow path switching assembly includes a first air pipe valve component connected to the first air pipe structure, and a first liquid pipe valve component connected to the first liquid pipe structure, the first air pipe structure includes a first upper air pipe located on the air valve conduction outflow end side of the first air pipe valve component, and a first lower air pipe located on the air valve conduction inflow end side of the first air pipe valve component, the first liquid pipe structure includes a first upper liquid pipe located on the liquid valve conduction outflow end side of the first liquid pipe valve component, and a first lower liquid pipe located on the liquid valve conduction inflow end side of the first liquid pipe valve component; The first heat exchange branch group includes a first heat exchange branch, a second heat exchange branch, a third heat exchange branch and a fourth heat exchange branch. Among them, one end of the third heat exchange branch and the fourth heat exchange branch are both connected to the first upper air pipe, and the other ends of the third heat exchange branch and the fourth heat exchange branch are connected to the first upper liquid pipe after converging through the first three-way valve, one end of the second heat exchange branch is connected to the first lower air pipe, and the other end is connected to the first upper liquid pipe, one end of the first heat exchange branch is connected to the first lower air pipe, and the other end is connected to the first liquid separation position of the first lower liquid pipe.

7. The variable split heat exchanger according to claim 1, characterized in that: Also includes: The liquid separation element is connected to the first liquid pipe structure and is used to distribute the refrigerant to the first liquid pipe structure. The first liquid pipe structure is provided with a first liquid separation connecting pipe connected to the liquid separation element. The first liquid separation connecting pipe includes a first liquid inlet pipe section connected to a first liquid inlet position of the first liquid pipe structure. Wherein, the first liquid inlet pipe section is arranged on the side wall of the first liquid pipe structure.

8. The variable split heat exchanger according to any one of claims 1 to 7, characterized in that: The second heat exchange module is also included, which is arranged at the lower part of the first heat exchange module, wherein the second heat exchange module includes: A second heat exchange branch group, including a plurality of heat exchange branches; A second flow path switching component is connected to the multiple heat exchange branches of the second heat exchange branch group and is used to switch the connection mode of the multiple heat exchange branches of the second heat exchange branch group under different operation modes; The second liquid pipe structure is connected to the plurality of heat exchange branches of the second heat exchange branch group, and the second liquid pipe structure includes a second liquid inlet position for liquid inlet, and a second liquid separation position close to the second liquid inlet position. A second discrete element is provided between the second liquid inlet position and the second liquid separation position, and the second discrete element is used to disperse the refrigerant flowing in from the second liquid inlet position.

9. The variable split heat exchanger according to claim 8, characterized in that: The distance between the first discrete element and the first liquid inlet position is a first distance L1, and the distance between the second discrete element and the second liquid inlet position is a first distance L2. Among them, L1≤L2.

10. The variable split heat exchanger according to claim 8, characterized in that: The second liquid pipe structure is provided with a second liquid separation connecting pipe connected with the liquid separation element, and the second liquid separation connecting pipe includes a second liquid inlet pipe section connected with the second liquid pipe structure, and the second liquid inlet pipe section is provided on the side wall of the second liquid pipe structure. Wherein, the second liquid inlet pipe section is provided with a first resistance pipe section for increasing the flow resistance of the refrigerant.

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

12. An air conditioning system, characterized in that: It comprises the variable split heat exchanger as claimed in any one of claims 1 to 11.

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