Variable shunting heat exchange module and multi-split air conditioner
By using a variable flow heat exchange module in a multi-split air conditioner and adjusting the number of U-shaped heat exchange tubes and the length of the liquid distribution tube, the problem of uneven refrigerant overheating was solved, and the heat exchange performance and efficiency were improved.
Patent Information
- Application Number
- CN202511758574.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-03-03
AI Technical Summary
When a multi-split air conditioner switches between cooling and heating modes in its heat exchanger, the refrigerant overheating is uneven between different heat exchange branches, affecting heat exchange performance.
A variable flow heat exchange module is adopted, including a first variable module and a second variable module. By adjusting the number of U-shaped heat exchange tubes and the length of the liquid distribution tube, it is ensured that the difference in the number of U-shaped heat exchange tubes on the windward side is less than a preset difference, and the uniformity of refrigerant distribution is achieved through the liquid distribution element, thereby optimizing the refrigerant flow path.
It improves the heat exchange performance of the heat exchanger in different modes, reduces the difference in the degree of refrigerant superheating, and enhances the overall heat exchange capacity and efficiency of the air conditioner.
Smart Images
Figure CN121594429A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of air conditioning equipment technology, such as a variable flow heat exchange module and a multi-split air conditioner. Background Technology
[0002] The heat exchanger is an important structural component of an air conditioner, and its heat exchange capacity is related to the cooling or heating efficiency of the air conditioner.
[0003] When switching between cooling and heating modes, the same heat exchanger functions as both an evaporator and a condenser in an air conditioner. The variable flow heat exchanger incorporates unidirectional conduction components on both the gas and liquid manifolds. When the heat exchanger is used as an evaporator, these components are open, connecting multiple heat exchange branches in parallel. When used as a condenser, these components are closed, connecting multiple heat exchange branches in series. This ensures optimal refrigerant flow paths for both evaporators and condensers, improving the air conditioner's cooling and heating efficiency.
[0004] Multi-split air conditioner outdoor units have many heat exchanger pipes. When this type of large-capacity air conditioner adopts a variable flow path design, it is easy for the refrigerant to overheat differently in different heat exchange branches, resulting in a decrease in performance.
[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention
[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.
[0007] This disclosure provides a variable flow heat exchange module and a multi-split air conditioner to improve the uniformity of refrigerant overheating between different heat exchange branches and improve heat exchange performance.
[0008] In some embodiments, the variable flow heat exchange module includes: a first variable module, including multiple heat exchange branches, wherein the refrigerant flow paths formed by the multiple heat exchange branches are different when the first variable module is used as an evaporator and as a condenser; the first variable module includes M1 U-shaped heat exchange tubes, wherein the U-shaped heat exchange tubes disposed on the windward side are MY1; and a second variable module, including multiple heat exchange branches, wherein the refrigerant flow paths formed by the multiple heat exchange branches are different when the second variable module is used as an evaporator and as a condenser; the second variable module includes M2 U-shaped heat exchange tubes, wherein the U-shaped heat exchange tubes disposed on the windward side are MY2, wherein the difference between MY1 and MY2 is less than or equal to a first preset difference.
[0009] In some alternative embodiments, the first preset difference is greater than or equal to 0 and less than or equal to 3.
[0010] In some alternative embodiments, 10 / 21≤MY1 / M1≤11 / 21; and / or, 10 / 21≤MY2 / M2≤11 / 21.
[0011] In some optional embodiments, the second variable module is disposed below the first variable module. The first variable module includes a first refrigerant inlet and outlet connected to the heat exchange tube on the windward side. The second variable module includes a second refrigerant inlet and outlet connected to the heat exchange tube on the windward side. The variable flow heat exchange module also includes a first liquid distribution element. The first total inlet and outlet of the variable flow heat exchange module are connected to the first refrigerant inlet and outlet and the second refrigerant inlet and outlet through the first liquid distribution element. The first liquid distribution element includes a liquid distribution body and a first liquid distribution pipe and a second liquid distribution pipe connected to the liquid distribution body. The first liquid distribution pipe is connected to the first refrigerant inlet and outlet, and the second liquid distribution pipe is connected to the second refrigerant inlet and outlet. The length of the first liquid distribution pipe is H1, the length of the second liquid distribution pipe is H2, and H2 > H1.
[0012] In some alternative embodiments, the difference between H2 and H1 is greater than or equal to 95 mm and less than or equal to 135 mm.
[0013] In some optional embodiments, the variable flow heat exchange module further includes: a third variable module, which includes multiple heat exchange branches. When the third variable module is used as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The third variable module includes M3 U-shaped heat exchange tubes, of which MY3 U-shaped heat exchange tubes are set on the windward side. The difference between MY1 and MY3 is less than or equal to a second preset difference; the difference between MY2 and MY3 is less than or equal to a third preset difference.
[0014] In some optional embodiments, the second preset difference is greater than or equal to 0 and less than or equal to 3; and / or, the third preset difference is greater than or equal to 0 and less than or equal to 3; and / or, 10 / 21≤MY3 / M3≤11 / 21; and / or, MY1 / M1:MY2 / M2:MY3 / M3=10 / 21:1 / 2:1 / 2.
[0015] In some optional embodiments, the third variable module is disposed below the second variable module. The third variable module includes a third refrigerant inlet and outlet connected to the heat exchange tube on the windward side. The first liquid distribution element also includes a third liquid distribution pipe connected to the liquid distribution body. The length of the third liquid distribution pipe is H3, wherein H2 > H3; and / or H1 > H3.
[0016] In some alternative embodiments, the difference between H2 and H3 is greater than or equal to 150 mm and less than or equal to 200 mm.
[0017] In some alternative embodiments, the difference between H1 and H3 is greater than or equal to 40 mm and less than or equal to 80 mm.
[0018] In some alternative embodiments, the inner diameter of the first dispensing tube is D1, the inner diameter of the second dispensing tube is D2, and the inner diameter of the third dispensing tube is D3, wherein D3 > D1; and / or, D3 > D2.
[0019] In some optional embodiments, the first variable module includes a first liquid pipe manifold with a first refrigerant inlet and outlet. The first variable module includes a first heat exchange branch, a second heat exchange branch, a third heat exchange branch, and a fourth heat exchange branch. A first T-shaped plug is provided at the first top end of the first liquid pipe manifold; and / or a first dispersing element is provided at the first bottom end of the first liquid pipe manifold; and / or the first heat exchange branch and the second heat exchange branch are connected to the first liquid pipe manifold through a first Y-shaped pipe, and the third heat exchange branch and the fourth heat exchange branch are connected to the first liquid pipe manifold through a second Y-shaped pipe.
[0020] In some embodiments, the multi-split air conditioner includes a variable flow heat exchange module as described above.
[0021] The variable flow heat exchange module and multi-split air conditioner provided in this disclosure can achieve the following technical effects: The variable flow heat exchange module includes a first variable module and a second variable module. The first variable module has a total of M1 U-shaped heat exchange tubes, of which MY1 U-shaped heat exchange tubes are located on the windward side of the heat exchange module. The second variable module has a total of M2 U-shaped heat exchange tubes, of which MY2 U-shaped heat exchange tubes are located on the windward side of the heat exchange module.
[0022] The difference between MY1 and MY2 is less than or equal to the first preset difference. This ensures that the number of U-shaped heat exchange tubes on the windward side of the heat exchange module in the first variable module is not much different from the number of U-shaped heat exchange tubes on the windward side of the heat exchange module in the second variable module. Consequently, the degree of refrigerant overheating in each heat exchange branch in the first variable module is not much different from the degree of refrigerant overheating in each heat exchange branch in the second variable module, thereby improving the heat exchange performance of the heat exchange module.
[0023] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description
[0024] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are considered similar elements. The drawings do not constitute a limitation of scale, and wherein: Figure 1 This is a schematic diagram of a variable flow splitting heat exchange module provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of another variable flow split heat exchange module provided in an embodiment of this disclosure.
[0025] Figure label: 100. First variable module; 101. First U-shaped heat exchange tube; 110. First heat exchange branch; 120. Second heat exchange branch; 130. Third heat exchange branch; 140. Fourth heat exchange branch; 150. Fifth heat exchange branch; 160. Sixth heat exchange branch; 170. First liquid manifold; 171. First refrigerant inlet / outlet; 172. First dispersing element; 173. First T-shaped plug; 174. First Y-shaped tube; 175. Second Y-shaped tube; 176. Liquid check valve; 180. First gas manifold; 181. Gas check valve; 200, Second variable module; 201, Second U-shaped heat exchange tube; 211, Second refrigerant inlet and outlet; 210, Seventh heat exchange branch; 220, Eighth heat exchange branch; 230, Ninth heat exchange branch; 240, Tenth heat exchange branch; 250, Eleventh heat exchange branch; 260, Twelfth heat exchange branch; 300, Third Variable Module; 301, Third U-shaped Heat Exchanger Tube; 311, Third Refrigerant Inlet / Outlet; 310, Thirteenth Heat Exchange Branch; 320, Fourteenth Heat Exchange Branch; 330, Fifteenth Heat Exchange Branch; 340, Sixteenth Heat Exchange Branch; 350, Seventeenth Heat Exchange Branch; 360, Eighteenth Heat Exchange Branch; 400, First dispensing element; 410, First dispensing tube; 420, Second dispensing tube; 430, Third dispensing tube; 501. First Total Import and Export; 502. Second Total Import and Export. Detailed Implementation
[0026] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.
[0027] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0028] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.
[0029] Furthermore, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, "connection" can refer to an installation 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 refer to the internal communication between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.
[0030] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.
[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.
[0032] This disclosure provides a variable flow heat exchange module.
[0033] Optionally, the variable flow heat exchange module includes a first variable module 100 and a second variable module 200. The first variable module 100 includes multiple heat exchange branches. When the first variable module 100 functions as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The first variable module 100 includes M1 U-shaped heat exchange tubes, of which MY1 U-shaped heat exchange tubes are located on the windward side. The second variable module 200 includes multiple heat exchange branches. When the second variable module 200 functions as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The second variable module 200 includes M2 U-shaped heat exchange tubes, of which MY2 U-shaped heat exchange tubes are located on the windward side.
[0034] Among them, the difference between MY1 and MY2 is less than or equal to the first preset difference.
[0035] In the first variable module 100, among the M1 total number of U-shaped heat exchange tubes, MY1 first U-shaped heat exchange tubes 101 are disposed on the windward side of the variable flow heat exchange module; in the second variable module 200, among the M2 total number of U-shaped heat exchange tubes, MY2 second U-shaped heat exchange tubes 201 are disposed on the windward side of the variable flow heat exchange module. Furthermore, the difference between MY1 and MY2 is less than or equal to a first preset difference.
[0036] In double-row or multi-row heat exchangers, the side closest to the fan is the windward side, and the side away from the fan is the leeward side. For example... Figures 4 to 6 As shown, the thickened U-shaped heat exchange tubes are those positioned on the windward side. It can be understood that two adjacent straight heat exchange tubes are connected by a U-shaped bend to form a complete U-shaped heat exchange tube, as shown below. Figures 4 to 6 As shown.
[0037] In this embodiment, the difference between MY1 and MY2 is less than or equal to a first preset difference. This ensures that the number of U-shaped heat exchange tubes on the windward side in the first variable module 100 and the second variable module 200 is not significantly different, thus balancing the refrigerant overheating degree in multiple heat exchange branches in the first variable module 100 and the second variable module 200, and improving the heat exchange capacity of the variable flow heat exchange module.
[0038] Optionally, the first preset difference is greater than or equal to 0 and less than or equal to 3.
[0039] The first preset difference can be 0, 1, 2, or 3, etc. In this way, the difference in the number of U-shaped heat exchange tubes set on the windward side in the first variable module 100 and the second variable module 200 is reduced, thereby improving the heat exchange uniformity between the first variable module 100 and the second variable module 200 and improving the overall heat exchange capacity of the heat exchange module.
[0040] Optionally, 10 / 21≤MY1 / M1≤11 / 21.
[0041] In the first variable module 100, the total number M1 of U-shaped heat exchange tubes can be 21, of which the number MY1 of the first U-shaped heat exchange tubes 101 disposed on the windward side can be 10 or 11; or, the total number M1 of U-shaped heat exchange tubes can be 22, of which the number MY1 of the first U-shaped heat exchange tubes 101 disposed on the windward side can be 11. In this embodiment of the present disclosure, the number of the first U-shaped heat exchange tubes 101 disposed on the windward side in the first variable module 100 is approximately half the total number of U-shaped heat exchange tubes.
[0042] Optionally, 10 / 21≤MY2 / M2≤11 / 21.
[0043] In the second variable module 200, the total number M2 of U-shaped heat exchange tubes can be 21, of which the number MY2 of second U-shaped heat exchange tubes 201 disposed on the windward side can be 10 or 11; or, the total number M2 of U-shaped heat exchange tubes can be 22, of which the number MY2 of second U-shaped heat exchange tubes 201 disposed on the windward side can be 11. In this embodiment of the present disclosure, the number of second U-shaped heat exchange tubes 201 disposed on the windward side in the second variable module 200 is approximately half the total number of U-shaped heat exchange tubes.
[0044] Optionally, the second variable module 200 is disposed below the first variable module 100. The first variable module 100 includes a first refrigerant inlet / outlet 171 connected to the heat exchange tube on the windward side. The second variable module 200 includes a second refrigerant inlet / outlet 211 connected to the heat exchange tube on the windward side. The variable flow heat exchange module also includes a first liquid distribution element 400. The first total inlet / outlet 501 of the variable flow heat exchange module is connected to the first refrigerant inlet / outlet 171 and the second refrigerant inlet / outlet 211 through the first liquid distribution element 400. The first liquid distribution element 400 includes a liquid distribution body and a first liquid distribution pipe 410 and a second liquid distribution pipe 420 connected to the liquid distribution body. The first liquid distribution pipe 410 is connected to the first refrigerant inlet / outlet 171, and the second liquid distribution pipe 420 is connected to the second refrigerant inlet / outlet 211. The length of the first liquid distribution pipe 410 is H1, the length of the second liquid distribution pipe 420 is H2, and H2 > H1.
[0045] Along the height direction, the first variable module 100 is disposed above the second variable module 200, such as... Figures 1 to 3 As shown. The first liquid distribution element 400 is connected to the first total inlet and outlet 501 of the heat exchange module, and is connected to the first variable module 100 and the second variable module 200 through the first liquid distribution pipe 410 and the second liquid distribution pipe 420, respectively, to perform liquid distribution.
[0046] The length H1 of the first distribution pipe 410 can be understood as the length of the distribution pipe between the first distribution element 400 and the first refrigerant inlet / outlet 171; similarly, the length H2 of the second distribution pipe 420 can be understood as the length of the distribution pipe between the second distribution element and the second refrigerant inlet / outlet 211. Figure 1 As shown. This improves the uniformity of refrigerant distribution between the first variable module 100 and the second variable module 200.
[0047] Optionally, the difference between H2 and H1 is greater than or equal to 95 mm and less than or equal to 135 mm.
[0048] For example, the difference between H2 and H1 can be 95mm, 100mm, 110mm, 120mm, 130mm or 135mm.
[0049] Optionally, the variable flow heat exchange module also includes a third variable module 300. The third variable module 300 includes multiple heat exchange branches. When the third variable module 300 is used as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The third variable module 300 includes M3 U-shaped heat exchange tubes, of which MY3 U-shaped heat exchange tubes are set on the windward side. The difference between MY1 and MY3 is less than or equal to a second preset difference; the difference between MY2 and MY3 is less than or equal to a third preset difference.
[0050] In the third variable module 300, among the M3 total number of U-shaped heat exchange tubes, MY3 third U-shaped heat exchange tubes 301 are arranged on the windward side of the variable flow heat exchange module. Optionally, 10 / 21≤MY3 / M3≤11 / 21. In the third variable module 300, the total number M3 of U-shaped heat exchange tubes can be 21, of which MY3 of the third U-shaped heat exchange tubes 301 arranged on the windward side can be 10 or 11; or, the total number M3 of U-shaped heat exchange tubes can be 22, of which MY3 of the third U-shaped heat exchange tubes 301 arranged on the windward side can be 11.
[0051] Optionally, the difference between MY1 and MY3 is less than or equal to a second preset difference. This reduces the difference in the number of first U-shaped heat exchange tubes 101 disposed on the windward side in the first variable module 100 and third U-shaped heat exchange tubes 301 disposed on the windward side in the third variable module 300, thereby improving the heat exchange uniformity between the first variable module 100 and the third variable module 300. Optionally, the second preset difference is greater than or equal to 0 and less than or equal to 3. For example, the second preset difference can be 0, 1, 2, or 3, etc.
[0052] Optionally, the difference between MY2 and MY3 is less than or equal to a third preset difference. This reduces the difference in the number of second U-shaped heat exchange tubes 201 disposed on the windward side in the second variable module 200 and the third U-shaped heat exchange tubes 301 disposed on the windward side in the third variable module 300, thereby improving the heat exchange uniformity between the second variable module 200 and the third variable module 300. Optionally, the third preset difference is greater than or equal to 0 and less than or equal to 3. For example, the third preset difference can be 0, 1, 2, or 3, etc.
[0053] Optionally, MY1 / M1:MY2 / M2:MY3 / M3 = 10 / 21:1 / 2:1 / 2.
[0054] In this embodiment of the disclosure, the total number M1 of the first variable module 100 U-shaped heat exchange tubes is 21, of which the number MY1 of the first U-shaped heat exchange tubes 101 disposed on the windward side is 10; the total number M2 of the second variable module 200 U-shaped heat exchange tubes is 20, of which the number MY2 of the second U-shaped heat exchange tubes 201 disposed on the windward side is 10; and the total number M3 of the third variable module 300 U-shaped heat exchange tubes is 20, of which the number MY3 of the third U-shaped heat exchange tubes 301 disposed on the windward side is 10.
[0055] Optionally, the third variable module 300 is disposed below the second variable module 200. The third variable module 300 includes a third refrigerant inlet / outlet 311 connected to the heat exchange tube on the windward side. The first liquid distribution element 400 also includes a third liquid distribution pipe 430 connected to the liquid distribution body. The length of the third liquid distribution pipe 430 is H3, wherein H2 > H3; and / or H1 > H3.
[0056] The length H2 of the second dispensing tube 420 is greater than the length H3 of the third dispensing tube 430, and / or the length of the first dispensing tube 410 is greater than the length H3 of the third dispensing tube 430. This improves the uniformity of dispensing from the first dispensing element 400 to the first variable module 100, the second variable module 200, and the third variable module 300.
[0057] Optionally, the difference between H2 and H3 is greater than or equal to 150 mm and less than or equal to 200 mm.
[0058] For example, the difference between H2 and H3 can be 150mm, 160mm, 170mm, 180mm, 190mm or 200mm.
[0059] Optionally, the difference between H1 and H3 is greater than or equal to 40 mm and less than or equal to 80 mm.
[0060] For example, the difference between H1 and H3 can be 40mm, 50mm, 60mm, 70mm or 80mm.
[0061] Optionally, the inner diameter of the first dispensing tube 410 is D1, the inner diameter of the second dispensing tube 420 is D2, and the inner diameter of the third dispensing tube 430 is D3, wherein D3 > D1; and / or, D3 > D2.
[0062] In this embodiment, the inner diameter D3 of the third distribution pipe 430 of the lowest variable module 300 is relatively large, which reduces the problem of refrigerant reduction in the lowest variable module caused by the compressor's high-frequency overshoot effect, resulting in a more uniform distribution of refrigerant among the first variable module 100, the second variable module 200, and the third variable module 300. For example, the inner diameter D3 of the third distribution pipe 430 can be 7 mm, the inner diameter D1 of the first distribution pipe 410 can be 6 mm, and the inner diameter D2 of the second distribution pipe 420 can be 6 mm.
[0063] Optionally, the first variable module 100 includes a first liquid pipe manifold 170 with a first refrigerant inlet and outlet 171. The first variable module 100 includes a first heat exchange branch 110, a second heat exchange branch 120, a third heat exchange branch 130, and a fourth heat exchange branch 140. The first liquid pipe manifold 170 has a first T-shaped plug 173 at its first top end; and / or, the first liquid pipe manifold 170 has a first dispersing element 172 at its first bottom end; and / or, the first heat exchange branch 110 and the second heat exchange branch 120 are connected to the first liquid pipe manifold 170 through a first Y-shaped pipe 174, and the third heat exchange branch 130 and the fourth heat exchange branch 140 are connected to the first liquid pipe manifold 170 through a second Y-shaped pipe 175.
[0064] The first heat exchange branch 110, the second heat exchange branch 120, the third heat exchange branch 130, and the fourth heat exchange branch 140 are arranged sequentially from top to bottom. The first heat exchange branch 110 and the second heat exchange branch 120 are connected to the first liquid pipe manifold 170 through the first Y-shaped pipe 174, and the third heat exchange branch 130 and the fourth heat exchange branch 140 are connected to the first liquid pipe manifold 170 through the second Y-shaped pipe 175, which improves the uniformity of refrigerant distribution in these four heat exchange branches.
[0065] Similarly, the second variable module 200 includes a second liquid manifold with a second refrigerant inlet and outlet 211, and the four heat exchange branches located at the top of the second variable module 200 are also connected to the second liquid manifold through two Y-shaped pipes.
[0066] Similarly, the second variable module 200 includes a third liquid manifold with a third refrigerant inlet and outlet 311, and the four heat exchange branches located at the top of the third variable module 300 are also connected to the third liquid manifold through two Y-shaped pipes.
[0067] Optionally, a first T-shaped plug 173 is provided at the first top end of the first liquid pipe manifold 170, which reduces the refrigerant overshoot effect caused by the high frequency of the compressor; similarly, a second T-shaped plug is provided at the second top end of the second liquid pipe manifold; and a third T-shaped plug is provided at the third top end of the third liquid pipe manifold.
[0068] Optionally, a first dispersing element 172 is provided at the first bottom end of the first liquid manifold 170 to disperse the gas-liquid two-phase refrigerant and improve the uniformity of refrigerant distribution; similarly, a second dispersing element is provided at the second bottom end of the second liquid manifold; and a third dispersing element is provided at the third bottom end of the third liquid manifold. For example, the dispersing element can be a 100-mesh filter screen.
[0069] In Example 1, the first variable module 100 includes, from top to bottom, a first heat exchange branch 110, a second heat exchange branch 120, a third heat exchange branch 130, a fourth heat exchange branch 140, a fifth heat exchange branch 150, and a sixth heat exchange branch 160. The total number M1 of the U-shaped heat exchange tubes in the first variable module 100 is 21, of which MY1 is 10 first U-shaped heat exchange tubes 101 located on the windward side. The length H1 of the first liquid distribution pipe 410 is 565 mm, and the inner diameter D1 is 6 mm.
[0070] The second variable module 200 includes, from top to bottom, a seventh heat exchange branch 210, an eighth heat exchange branch 220, a ninth heat exchange branch 230, a tenth heat exchange branch 240, an eleventh heat exchange branch 250, and a twelfth heat exchange branch 260. The second variable module 200 has a total of 20 U-shaped heat exchange tubes (M2), of which 10 are located on the windward side (MY2). The second liquid distribution pipe 420 has a length (H2) of 685 mm and an inner diameter (D2) of 6 mm.
[0071] The third variable module 300 includes, from top to bottom, a thirteenth heat exchange branch 310, a fourteenth heat exchange branch 320, a fifteenth heat exchange branch 330, a sixteenth heat exchange branch 340, a seventeenth heat exchange branch 350, and an eighteenth heat exchange branch 360. The third variable module 300 has a total of 20 U-shaped heat exchange tubes (M3), of which 10 are located on the windward side (MY3). The third distributor pipe 430 has a length (H3) of 505 mm and an inner diameter (D3) of 7 mm. Table 1 shows the refrigerant inlet and outlet temperatures of the multiple heat exchange branches when the variable flow heat exchange module is used as an evaporator.
[0072] Table 1
[0073] As can be seen from Table 1, the difference between the maximum and minimum outlet temperatures of the heat exchange branch of the variable flow heat exchange module provided in this embodiment is less than 5°C. Furthermore, the temperature difference between the refrigerant inlet and refrigerant outlet of each heat exchange branch is greater than -1°C and less than 3°C, which meets the requirements for the uniformity of liquid distribution in outdoor heat exchangers.
[0074] Optionally, the first liquid manifold 170 of the first variable module 100 is equipped with a liquid check valve 176, and the first gas manifold 180 is equipped with a gas check valve 181. The liquid check valve 176 is located between the fifth heat exchange branch 150 and the sixth heat exchange branch 160, and the gas check valve 181 is located between the fourth heat exchange branch 140 and the fifth heat exchange branch 150. When the first variable module 100 functions as a condenser, the two check valves are not open. The refrigerant flowing from the first gas manifold 180 first flows through the first heat exchange branch 110, the second heat exchange branch 120, the third heat exchange branch 130, and the fourth heat exchange branch 140, and then sequentially flows through the fifth heat exchange branch 150 and the sixth heat exchange branch 160.
[0075] When the first variable module 100 functions as an evaporator, the two one-way valves are activated, allowing the refrigerant flowing from the first liquid manifold 170 to pass through the first heat exchange branch 110, the second heat exchange branch 120, the third heat exchange branch 130, the fourth heat exchange branch 140, the fifth heat exchange branch 150, and the sixth heat exchange branch 160, respectively. This achieves variable flow distribution.
[0076] Similarly, the second variable module 200 and the third variable module 300 can also implement variable current distribution.
[0077] This disclosure also provides a multi-split air conditioner.
[0078] Optionally, the multi-split air conditioner includes the aforementioned variable flow heat exchange module.
[0079] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A variable flow splitting heat exchange module, characterized in that, include: The first variable module (100) includes multiple heat exchange branches. When the first variable module (100) is used as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The first variable module (100) includes M1 U-shaped heat exchange tubes, of which MY1 U-shaped heat exchange tubes are set on the windward side. The second variable module (200) includes multiple heat exchange branches. When the second variable module (200) is used as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The second variable module (200) includes M2 U-shaped heat exchange tubes, of which MY2 U-shaped heat exchange tubes are set on the windward side. Among them, the difference between MY1 and MY2 is less than or equal to the first preset difference.
2. The variable flow splitting heat exchange module according to claim 1, characterized in that, The first preset difference is greater than or equal to 0 and less than or equal to 3.
3. The variable flow splitting heat exchange module according to claim 2, characterized in that, 10 / 21≤MY1 / M1≤11 / 21; and / or, 10 / 21≤MY2 / M2≤11 / 21.
4. The variable flow heat exchange module according to any one of claims 1 to 3, characterized in that, The second variable module (200) is disposed below the first variable module (100). The first variable module (100) includes a first refrigerant inlet / outlet (171) connected to the heat exchange tube on the windward side, and the second variable module (200) includes a second refrigerant inlet / outlet (211) connected to the heat exchange tube on the windward side. The variable flow heat exchange module also includes a first liquid distribution element (400). The first total inlet and outlet (501) of the variable flow heat exchange module is connected to the first refrigerant inlet and outlet (171) and the second refrigerant inlet and outlet (211) through the first liquid distribution element (400). The first dispensing element (400) includes a dispensing body and a first dispensing pipe (410) and a second dispensing pipe (420) connected to the dispensing body. The first dispensing pipe (410) is connected to the first refrigerant inlet / outlet (171), and the second dispensing pipe (420) is connected to the second refrigerant inlet / outlet (211). The length of the first dispensing pipe (410) is H1, and the length of the second dispensing pipe (420) is H2. H2 > H1; and / or, The difference between H2 and H1 is greater than or equal to 95 mm and less than or equal to 135 mm.
5. The variable flow splitting heat exchange module according to claim 4, characterized in that, Also includes: The third variable module (300) includes multiple heat exchange branches. When the third variable module (300) is used as an evaporator and as a condenser, the refrigerant flow paths formed by the multiple heat exchange branches are different. The third variable module (300) includes M3 U-shaped heat exchange tubes, of which MY3 U-shaped heat exchange tubes are set on the windward side. Among them, the difference between MY1 and MY3 is less than or equal to the second preset difference; the difference between MY2 and MY3 is less than or equal to the third preset difference.
6. The variable flow splitting heat exchange module according to claim 5, characterized in that, The second preset difference is greater than or equal to 0 and less than or equal to 3; and / or, The third preset difference is greater than or equal to 0 and less than or equal to 3; and / or, 10 / 21≤MY3 / M3≤11 / 21; and / or, MY1 / M1:MY2 / M2:MY3 / M3=10 / 21:1 / 2:1 / 2.
7. The variable flow splitting heat exchange module according to claim 5, characterized in that, The third variable module (300) is located below the second variable module (200). The third variable module (300) includes a third refrigerant inlet / outlet (311) connected to the heat exchange tube on the windward side. The first liquid distribution element (400) also includes a third liquid distribution pipe (430) connected to the liquid distribution body. The length of the third liquid distribution pipe (430) is H3. H2 > H3; and / or, H1 > H3; and / or, The difference between H2 and H3 is greater than or equal to 150 mm and less than or equal to 200 mm; and / or, The difference between H1 and H3 is greater than or equal to 40 mm and less than or equal to 80 mm.
8. The variable flow splitting heat exchange module according to claim 7, characterized in that, The inner diameter of the first separating tube (410) is D1, the inner diameter of the second separating tube (420) is D2, and the inner diameter of the third separating tube (430) is D3. D3 > D1; and / or, D3 > D2.
9. The variable flow splitting heat exchange module according to claim 7, characterized in that, The first variable module (100) includes a first liquid manifold (170) with a first refrigerant inlet and outlet (171), and the first variable module (100) includes a first heat exchange branch (110), a second heat exchange branch (120), a third heat exchange branch (130), and a fourth heat exchange branch (140), wherein, A first T-shaped plug (173) is provided at the first top end of the first liquid pipe manifold (170); and / or, A first dispersing element (172) is provided at the first bottom end of the first liquid pipe manifold (170); and / or, The first heat exchange branch (110) and the second heat exchange branch (120) are connected to the first liquid manifold (170) through the first Y-shaped pipe (174), and the third heat exchange branch (130) and the fourth heat exchange branch (140) are connected to the first liquid manifold (170) through the second Y-shaped pipe (175).
10. A multi-split air conditioner, characterized in that, Includes the variable flow heat exchange module as described in any one of claims 1 to 9.