Gas-liquid separation type heat exchange system and heat exchanger thereof

Abstract

The invention relates to a gas-liquid separation type heat exchange system and a heat exchanger thereof. The gas-liquid separation type heat exchanger comprises a separation shell, a heat exchange shell, a first heat exchanger plate core, a first partition plate, a second partition plate and a permeable membrane set. According to the gas-liquid separation type heat exchange system and the heat exchanger thereof, in the actual use process, two-phase separation heat exchange is achieved through distribution of the cavities in the shell, synchronous heat exchange is conducted, meanwhile, the contact sectional area of the heat exchange channels is increased, and then the heat exchange characteristic is improved.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a gas-liquid separation heat exchange system and a heat exchanger thereof. Background Art

[0002] For the high heat flux density heat exchange requirements of data centers, the performance of the heat exchanger directly affects the operating efficiency of the entire system. When the secondary cooling medium of the cabinet entering the data center takes away the heat through circulation, it needs to exchange heat with the primary cooling medium outside to reduce its own temperature. After the heat exchange, the low-temperature cooling medium on the secondary side is circulated to cool the entire system.

[0003] As the demand for heat dissipation in data centers continues to increase, the application of liquid cooling technology has gradually replaced the original air cooling method. Liquid cooling removes the heat generated by the data center through the increase in the temperature of the cooling medium itself, and guarantees the cooling demand of the data center through circulation.

[0004] However, for a single-phase flow system, the method of removing heat by temperature rise has limitations and cannot meet the heat exchange requirements of high heat flux density in a limited space. Therefore, through the phase change of the medium, the latent heat of phase change is fully utilized to remove the heat. This method can solve the heat exchange requirements of high heat flux density in a limited space to a greater extent. The medium heat exchange process changes from the liquid phase to the gas phase, so it can be called a two-phase flow system. At present, for the secondary and primary side heat exchange processes, plate or tube-fin heat exchangers are mostly used. When the two-phase flow fluid enters the heat exchanger for heat exchange, the gas phase of the two-phase flow is cooled and condensed into a liquid phase. In this process, the formation of a liquid film will cause the heat exchange channel to be blocked, reducing the heat exchange efficiency.

[0005] Existing heat exchangers usually increase the heat exchange area to improve the heat exchange performance of heat exchangers in limited space. However, increasing the heat exchange area in a limited space will increase the number of fluid channels or reduce the cross-sectional area of ​​a single channel. For two-phase flow fluids, the cross-sectional area of ​​the heat exchange channel will decrease, which will increase the probability of gas phase condensation to produce liquid film. When the interaction force between the liquid film and the inner wall of the channel is strong, the condensed droplets are not easy to fall off under the action of surface tension. This phenomenon greatly reduces the heat exchange characteristics of heat exchangers with smaller channel cross-sectional areas. Summary of the invention

[0006] Based on this, it is necessary to reduce the cross-sectional area of ​​the heat exchange channel for two-phase flow fluids, which will increase the probability of gas phase condensation to produce liquid film. When the interaction force between the liquid film and the inner wall of the channel is strong, the condensed droplets are not easy to fall off under the action of surface tension. This phenomenon greatly reduces the problem of heat exchange characteristics for heat exchangers with smaller channel cross-sectional areas, and provides a gas-liquid separation heat exchange system and a heat exchanger thereof.

[0007] A gas-liquid separation type heat exchanger, comprising: a separation shell, a heat exchange shell, a first heat exchanger plate core, a first partition plate and a permeable membrane group;

[0008] The separation shell is located at the upper end of the heat exchange shell and connected to the heat exchange shell, and the first partition is arranged in the separation shell and divides the internal space of the separation shell into an air chamber and a permeation chamber distributed in the horizontal direction;

[0009] The permeable membrane group is located in the permeable chamber and divides the permeable chamber into a gas phase chamber and a liquid phase chamber. The first partition plate is provided with air holes to connect the gas chamber and the gas phase chamber. The permeable membrane group is used to allow the gas phase to enter the gas phase chamber from the liquid phase chamber. The liquid phase chamber is used to contain gas and liquid phases.

[0010] The first heat exchanger plate core is located in the heat exchange shell and connected to the heat exchange shell; the first heat exchanger plate core has a first heat exchange channel, a second heat exchange channel and a third heat exchange channel that are independent of each other, one end of the first heat exchange channel is connected to the air chamber, one end of the second heat exchange channel is connected to the liquid phase cavity, the third heat exchange channel is used for circulation of cooling medium, and one end of the first heat exchange channel facing away from the separation shell is connected to one end of the second heat exchange channel facing away from the separation shell.

[0011] During actual use of the above-mentioned gas-liquid separation heat exchanger, the coolant is continuously introduced into the third heat exchange channel, and the coolant is the coolant on the primary side, and the coolant enters the first liquid collecting channel. Then, the gas-liquid two-phase is introduced into the liquid phase cavity, wherein the gas-liquid two-phase is the gas phase and liquid phase on the secondary side for heat exchange and cooling of the air conditioner or indoor heat exchange system, and the gas phase in the liquid phase cavity enters the gas phase cavity through the permeable membrane group, and the liquid phase on the secondary side exchanges heat with the coolant on the primary side in the third heat exchange channel in the second heat exchange channel and is cooled. The gas phase in the gas phase cavity enters the air chamber through the air hole, and then enters the first heat exchange channel. The gas phase on the secondary side in the first heat exchange channel exchanges heat with the coolant on the primary side in the third heat exchange channel and is cooled to become a liquid phase, and merges with the aforementioned liquid phase on the secondary side after being cooled, thereby completing the process of independent cooling and heat exchange of the gas phase and liquid phase on the secondary side, and finally merging. During the heat exchange process, both the gas phase and the liquid phase are cooled simultaneously through the same first heat exchanger plate core, and the merged secondary side coolant is used to cool the air conditioner or indoor heat exchange system, such as the user terminal or the end, so that the two-phase separation heat exchange is realized by distributing the chamber in the shell, and the heat exchange is carried out synchronously, while the cross-sectional area of ​​the heat exchange channel contact is increased, thereby improving the heat exchange characteristics.

[0012] In one embodiment, the gas-liquid separation heat exchanger further includes a second partition plate, which is located in the heat exchange shell and divides the heat exchange shell into a first liquid collecting flow channel and a second liquid collecting flow channel;

[0013] Along the direction in which the third heat exchange channel extends, one end of the first heat exchanger plate core is penetrated through the second partition plate, and the other end is connected to the heat exchange shell; one end of the first heat exchange channel is connected to the air chamber, and the other end is connected to the second liquid collecting channel; one end of the second heat exchange channel is connected to the liquid phase cavity, and the other end is connected to the second liquid collecting channel; one end of the third heat exchange channel is used to pass the coolant, and the other end is connected to the first liquid collecting channel.

[0014] In one embodiment, the permeable membrane group includes a plurality of permeable membranes connected in sequence, and any two adjacent permeable membranes are arranged at an angle.

[0015] In one embodiment, the gas-liquid separation heat exchanger further includes a third partition plate, and the plurality of permeable membranes at least include a first permeable membrane, a second permeable membrane and a third permeable membrane;

[0016] One end of the first permeable membrane is connected to the first partition, and the other end is connected to the inner wall of the separation shell; one end of the second permeable membrane is connected to the first partition, and the other end is connected to one end of the third permeable membrane, and the other end of the third permeable membrane is connected to the first partition; the first partition is provided with a first hole and a second hole, the first hole is for the gas phase between the first permeable membrane and the partition to pass through, and the second hole is for the gas phase between the second permeable membrane and the third permeable membrane to pass through;

[0017] The third partition is connected to the inner wall of the separation shell and is spaced apart from the first partition, and one end of the second permeable membrane connected to the third permeable membrane is spaced apart from the inner wall of the separation shell.

[0018] In one embodiment, the permeable membrane group also includes a covering permeable membrane, the first partition is provided with a third hole, the third hole is located on a side of the third permeable membrane close to the first heat exchanger plate core, and the covering permeable membrane covers the third hole to allow the gas phase on the side of the third permeable membrane close to the first heat exchanger plate core to pass through.

[0019] In one embodiment, the gas-liquid separation heat exchanger also includes a fourth partition plate, the fourth partition plate is provided with a fourth hole, the fourth partition plate is located between the third permeable membrane and the first heat exchanger plate core, the fourth partition plate is connected to the first partition plate and the inner wall of the separation shell at the same time, and the liquid phase enters the second heat exchange channel through the fourth hole.

[0020] In one embodiment, the gas-liquid separation heat exchanger also includes a second heat exchanger plate core located in the heat exchange shell, the second heat exchanger plate core is provided with a fourth heat exchange channel and a fifth heat exchange channel, one end of the second heat exchanger plate core is passed through the second partition plate to connect one end of the fourth heat exchange channel with the first liquid collecting channel, and the other end is used to pass the coolant, and one end of the first heat exchange channel away from the separation shell and one end of the second heat exchange channel away from the separation shell are both connected to one end of the fifth heat exchange channel.

[0021] In one embodiment, the heat exchange shell is provided with a first discharge hole and a second discharge hole, the first liquid collecting channel is connected to the first discharge hole, and the end of the fifth heat exchange channel away from the first heat exchanger plate core is connected to the second discharge hole.

[0022] In one embodiment, the gas-liquid separation heat exchanger further comprises a first header and a second header, one end of the first header is connected to an end of the third heat exchange flow channel away from the first header, and the other end is used for passing coolant;

[0023] One end of the second header is communicated with an end of the fourth heat exchange flow channel away from the first header, and the other end is used for passing coolant.

[0024] In one embodiment, the gas-liquid separation heat exchanger further comprises a first tube, a second tube and a valve, a side wall of the first tube is provided with a diverter hole, one end of the second tube is connected to the diverter hole, and the other end is connected to an end of the second header away from the fourth heat exchange flow channel;

[0025] One end of the first tube is used for passing coolant, and the other end is connected to an end of the first header away from the third heat exchange flow channel. The valve is arranged on the second tube to open or block the second tube.

[0026] An embodiment of the present application further provides a gas-liquid separation heat exchange system, the gas-liquid separation heat exchange system comprising: a plurality of groups of modules to be cooled, a power module and the gas-liquid separation heat exchanger;

[0027] The modules to be cooled each have a cooling inlet and a cooling outlet, one end of the first heat exchange channel away from the separation shell and one end of the second heat exchange channel away from the separation shell are both in communication with the plurality of cooling inlets, and the plurality of cooling outlets are in communication with the liquid phase cavity;

[0028] The power module is arranged between the cooling inlet and the gas-liquid separation heat exchanger and / or the power module is arranged between the cooling outlet and the gas-liquid separation heat exchanger.

[0029] In actual use of the gas-liquid separation heat exchange system, the coolant is continuously introduced into the third heat exchange flow channel, and the coolant is the coolant on the primary side, and the coolant enters the first liquid collecting flow channel. Then the gas-liquid two-phase is introduced into the liquid phase cavity, wherein the gas-liquid two-phase is the gas phase and liquid phase on the secondary side for heat exchange and cooling of the air conditioner or indoor heat exchange system, and the gas phase in the liquid phase cavity passes through the permeable membrane group and enters the gas phase cavity, and the liquid phase on the secondary side exchanges heat with the coolant on the primary side in the third heat exchange flow channel in the second heat exchange flow channel and is cooled. The gas phase in the gas phase cavity enters the air chamber through the air hole, and then enters the first heat exchange channel. The gas phase on the secondary side in the first heat exchange channel exchanges heat with the coolant on the primary side in the third heat exchange channel and is cooled to become a liquid phase, and merges with the aforementioned cooled liquid phase on the secondary side, thereby completing the process of independent cooling and heat exchange of the gas and liquid phases on the secondary side, and finally merging. At the same time, during the heat exchange process, the gas and liquid phases are cooled by the same first heat exchanger plate core at the same time. The merged secondary side coolant is then used for heat exchange and cooling of the cooling module to be cooled. The gas-liquid two phases with a higher temperature formed after cooling return to the gas-liquid separation heat exchanger for cooling, forming a coolant circulation, thereby realizing two-phase separation heat exchange by distributing the chamber in the shell, and performing synchronous heat exchange, while increasing the contact cross-sectional area of ​​the heat exchange channel, thereby improving the heat exchange characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of a gas-liquid separation heat exchanger according to an embodiment.

[0031] Figure 2 for Figure 1 A cross-sectional view of one of the sections.

[0032] Figure 3 for Figure 1 Another cross-sectional view.

[0033] Figure 4 Schematic diagram of a gas-liquid separation heat exchange system according to an embodiment.

[0034] Description of Figure Numbers:

[0035] 100-gas-liquid separation heat exchanger;

[0036] 110-separation housing; 111-air chamber; 112-permeation chamber; 113-gas phase cavity; 114-liquid phase cavity; 115-inlet hole;

[0037] 120 - heat exchange shell; 121 - first liquid collecting channel; 122 - second liquid collecting channel; 123 - first discharge hole; 124 - second discharge hole;

[0038] 130 - first heat exchanger plate core; 131 - first heat exchange channel; 132 - second heat exchange channel; 133 - third heat exchange channel;

[0039] 140-first baffle; 141-second baffle; 142-air hole; 143-first hole; 144-second hole; 145-third hole;

[0040] 150 - permeable membrane group; 151 - first permeable membrane; 152 - second permeable membrane; 153 - third permeable membrane; 154 - covering permeable membrane;

[0041] 160-third baffle; 161-fourth baffle; 162-fourth hole; 163-fifth baffle; 164-outflow hole;

[0042] 170 - second heat exchanger plate core; 171 - fourth heat exchange flow channel; 172 - fifth heat exchange flow channel;

[0043] 180-first header; 181-second header; 182-first tube; 183-second tube; 184-diverter hole; 185-valve;

[0044] 190-Stand;

[0045] 200-Gas-liquid separation heat exchange system;

[0046] 210 - module to be cooled; 211 - part to be cooled; 212 - cooling shell; 213 - liquid inlet pipe; 214 - liquid outlet pipe; 215 - two-phase flow cold plate; 216 - knife shell;

[0047] 220-power module; 221-switch valve. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0050] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0054] See also Figure 1 , Figure 1 A structural schematic diagram of a gas-liquid separation heat exchanger 100 in an embodiment of the present application is shown. The gas-liquid separation heat exchanger 100 provided in an embodiment of the present application includes: a separation shell 110, a heat exchange shell 120, a first heat exchanger plate core 130, a first partition plate 140 and a permeable membrane group 150.

[0055] See also Figure 2 and Figure 3 In the above-mentioned gas-liquid separation heat exchanger 100, the separation shell 110 is located at the upper end of the heat exchange shell 120 and connected to the heat exchange shell 120. The first partition 140 is arranged in the separation shell 110, and the internal space of the separation shell 110 is divided into a gas chamber 111 and a permeation chamber 112 distributed in the horizontal direction. The permeation membrane group 150 is located in the permeation chamber 112, and the permeation chamber 112 is divided into a gas phase cavity 113 and a liquid phase cavity 114. The first partition 140 is provided with a pore 142 to connect the gas chamber 111 and the gas phase cavity 113. The permeation membrane group 150 is used to allow the gas phase to enter the gas phase cavity 113 from the liquid phase cavity 114, and the liquid phase cavity 114 is used to accommodate gas and liquid phases. The second partition plate 141 and the first heat exchanger plate core 130 are located in the heat exchange shell 120. The second partition plate 141 is located in the heat exchange shell 120 and divides the heat exchange shell 120 into a first liquid collecting channel 121 and a second liquid collecting channel 122. The first heat exchanger plate core 130 has a first heat exchange channel 131, a second heat exchange channel 132 and a third heat exchange channel 133 that are independent of each other. One end of the first heat exchange channel 131 is connected to the air chamber 111, one end of the second heat exchange channel 132 is connected to the liquid phase cavity 114, and one end of the first heat exchange channel 131 away from the separation shell 110 is connected to one end of the second heat exchange channel 132 away from the separation shell 110.

[0056] In actual use of the gas-liquid separation heat exchanger 100, the coolant is continuously introduced into the third heat exchange channel 133, and the coolant is the coolant on the primary side, and the coolant enters the first liquid collecting channel 121. Then, the gas-liquid two-phase is introduced into the liquid phase cavity 114, wherein the gas-liquid two-phase is the gas phase and liquid phase on the secondary side for heat exchange and cooling the air conditioner or indoor heat exchange system, and the gas phase in the liquid phase cavity 114 enters the gas phase cavity 113 through the permeable membrane group 150, and the liquid phase on the secondary side exchanges heat with the coolant on the primary side in the third heat exchange channel 133 in the second heat exchange channel 132 and is cooled. The gas phase in the gas phase cavity 113 enters the air chamber 111 through the air hole 142, and then enters the first heat exchange channel 131. The gas phase on the secondary side in the first heat exchange channel 131 exchanges heat with the coolant on the primary side in the third heat exchange channel 133 and is cooled to become a liquid phase, and merges with the aforementioned cooled liquid phase on the secondary side, thereby completing the process of independent cooling and heat exchange of the gas phase and liquid phase on the secondary side, and finally merging. At the same time, during the heat exchange process, the gas phase and the liquid phase are cooled simultaneously through the same first heat exchanger plate core 130. The merged secondary side coolant is then used to cool and exchange heat with the air conditioner or indoor heat exchange system, such as a user terminal or end, thereby realizing two-phase separation heat exchange by distributing the chamber in the shell, and performing synchronous heat exchange, while increasing the cross-sectional area of ​​the heat exchange channel contact, thereby improving the heat exchange characteristics.

[0057] In one embodiment, the gas-liquid separation heat exchanger 100 further includes a second partition 141, which is located in the heat exchange shell 120 and divides the heat exchange shell 120 into a first liquid collecting channel 121 and a second liquid collecting channel 122. Along the direction in which the third heat exchange channel 133 extends, one end of the first heat exchanger plate core 130 is penetrated by the second partition 141, and the other end is connected to the heat exchange shell 120. One end of the first heat exchange channel 131 is connected to the air chamber 111, and the other end is connected to the second liquid collecting channel 122. One end of the second heat exchange channel 132 is connected to the liquid phase cavity 114, and the other end is connected to the second liquid collecting channel 122. One end of the third heat exchange channel 133 is used to pass the coolant, and the other end is connected to the first liquid collecting channel 121.

[0058] In this embodiment, the gas phase on the secondary side in the first heat exchange channel 131 exchanges heat with the coolant on the primary side in the third heat exchange channel 133 and is cooled to become a liquid phase, and merges with the liquid phase on the secondary side after being cooled in the second liquid collecting channel 122. The primary side coolant enters the first liquid collecting channel 121 after cooling is completed, and is separated from the coolant formed after the secondary side gas-liquid two-phase heat exchange and cooling, thereby completing the process of independent cooling and heat exchange of the gas phase and liquid phase of the secondary side, and finally merging. At the same time, during the heat exchange process, the gas phase and the liquid phase are cooled simultaneously through the same first heat exchanger plate core 130. The merged secondary side coolant is then used for air conditioning or indoor heat exchange systems, such as user terminals or terminals, thereby realizing two-phase separation heat exchange by distributing the chambers in the shell, and performing synchronous heat exchange, while increasing the contact cross-sectional area of ​​the heat exchange channel, thereby improving the heat exchange characteristics.

[0059] Specifically, the second partition 141 is a complete partition placed vertically, with its upper end connected to the top of the heat exchange shell and its lower end connected to the bottom of the heat exchange shell. Figure 2 and Figure 3 The second partition 141 can also be two plates, one end of one plate is connected to the top of the heat exchange shell, and the other end is connected to the end of the fifth partition away from the second header, the fifth partition is placed horizontally, one end of the other plate in the second partition 141 is connected to the bottom of the fifth partition, and the other end is connected to the bottom of the heat exchange shell. This method makes one side of the horizontal direction of the plate located at the bottom of the second partition 141, that is, the left side, used for cooling the gas phase; the other side, that is, the right side, is used for cooling the liquid phase, so as to realize clear gas phase and liquid phase cooling partitions.

[0060] See also Figure 2 and Figure 3 Specifically, the lower part of the upper separation shell 110 has an opening that is connected to the upper opening of the lower heat exchange shell 120. The first partition 140 extends in the vertical direction, one end of which is connected to the top inner wall of the separation shell 110, and the other end is directly connected to the first heat exchanger plate core 130. The two sides of the first partition 140 in the horizontal direction are one end of the first heat exchange channel 131 and one end of the second heat exchange channel 132. In this way, the process of the gas phase entering the first heat exchanger plate core 130 and the liquid phase entering the first heat exchanger plate core 130 are separated, and the gas phase and the liquid phase are separated and cooled. And the first partition 140 is placed in the vertical direction, which will not affect the gas phase or liquid phase flowing downward into the first heat exchanger plate core 130.

[0061] Specifically, the separation shell 110 is provided with an inlet hole 115 , which connects the outside of the separation shell 110 with the liquid phase cavity 114 , so as to allow the gas-liquid two-phase on the secondary side to pass into the liquid phase cavity 114 .

[0062] In one embodiment, the permeable membrane group includes a plurality of permeable membranes connected in sequence, and two adjacent permeable membranes are arranged at an angle, so that the gas phase of the gas-liquid two phases can be fully transferred from the liquid phase cavity 114 into the gas phase cavity 113 .

[0063] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 further includes a third partition 160, and the permeable membrane group 150 includes a first permeable membrane 151, a second permeable membrane 152, and a third permeable membrane 153. One end of the first permeable membrane 151 is connected to the first partition 140, and the other end is connected to the inner wall of the separation shell 110. One end of the second permeable membrane 152 is connected to the first partition 140 and is arranged at an angle to the first permeable membrane 151, and the other end is connected to one end of the third permeable membrane 153, and the other end of the third permeable membrane 153 is connected to the first partition 140. The third partition 160 is connected to the inner wall of the separation shell 110 and is spaced from the first partition 140 to allow the liquid phase to pass through, and one end of the second permeable membrane 152 connected to the third permeable membrane 153 is spaced from the inner wall of the separation shell 110 to allow the liquid phase to pass through. The first separator 140 is provided with a first hole 143 and a second hole 144 . The first hole 143 is for the gas phase between the first permeable membrane 151 and the separator to pass through, and the second hole 144 is for the gas phase between the second permeable membrane 152 and the third permeable membrane 153 to pass through.

[0064] In this embodiment, the permeation chamber 112 is divided into a gas phase chamber 113 and a liquid phase chamber 114 by the first permeable membrane 151, the second permeable membrane 152, the third permeable membrane 153 and the third partition 160. Compared with a whole permeable membrane, the permeable membrane area of ​​this scheme is larger, and the gas phase of the gas-liquid two phases can be permeated into the gas phase chamber 113 as much as possible, and enter the gas chamber 111 through the first hole 143 and the second hole 144. At the same time, the first permeable membrane 151, the second permeable membrane 152, the third permeable membrane 153 and the third partition 160 form a flow channel for the liquid phase. The third partition 160 is connected to the inner wall of the separation shell 110 and is spaced from the first partition 140 for the liquid phase to pass through. The end of the second permeable membrane 152 connected to the third permeable membrane 153 is spaced from the inner wall of the separation shell 110 for the liquid phase to pass through, so that the gas and liquid two phases are more in contact with the permeable membrane group 150 in the liquid phase flow direction, thereby improving the gas phase permeation rate.

[0065] Specifically, the first permeable membrane 151 is connected to the second permeable membrane 152 in a V-shape, the third partition plate 160 is located between the first permeable membrane 151 and the second permeable membrane 152, and is spaced apart from the connection between the first permeable membrane 151 and the second permeable membrane 152 for allowing the liquid phase to pass through, and the third permeable membrane 153 is placed horizontally to prevent the liquid from adhering to the third permeable membrane 153 before entering the first heat exchanger plate core 130.

[0066] See also Figure 2 and Figure 3 In one embodiment, the permeable membrane group 150 further includes a covering permeable membrane 154. The first partition plate 140 is provided with a third hole 145, which is located on the side of the third permeable membrane 153 close to the first heat exchanger plate core 130. The covering permeable membrane 154 covers the third hole 145 to allow the gas phase on the side of the third permeable membrane 153 close to the first heat exchanger plate core 130 to pass through. In this embodiment, before the liquid phase enters a heat exchanger plate core, a small amount of gas phase mixed with the liquid phase is once again precipitated into the gas chamber 111 through the third permeable membrane 153, so that the gas phase and the liquid phase are separated and cooled as much as possible.

[0067] Specifically, the first hole 143 is located between the first permeable membrane 151 and the top inner wall of the separation housing 110, the second hole 144 is located between the second permeable membrane 152 and the third permeable membrane 153, and the third hole 145 is located at the lower side of the third permeable membrane 153. The first hole 143 and the second hole 144 are both pores 142. Preferably, the first hole 143, the second hole 144 and the third hole 145 are arranged in the vertical direction.

[0068] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 further includes a fourth partition 161, which is provided with a fourth hole 162. The fourth partition 161 is located between the third permeable membrane 153 and the first heat exchanger core 130. The fourth partition 161 is connected to the first partition 140 and the inner wall of the separation shell 110 at the same time, and the liquid phase enters the second heat exchange flow channel 132 through the fourth hole 162. In this embodiment, the fourth partition 161 separates the separation of the gas-liquid phase from the process of the liquid phase entering the first heat exchanger core 130, which is the same as the function of the first partition 140. The first partition 140 separates the gas phase cavity 113 from the gas chamber 111, so that the separation of the gas-liquid phase through the fourth partition 161 and the process of the gas phase entering the first heat exchanger core 130 can be separated, thereby ensuring the stability of the cooling and heat exchange process of the first heat exchanger core 130 as much as possible.

[0069] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 also includes a second heat exchanger plate core 170 located in the heat exchange shell 120, and the second heat exchanger plate core 170 is provided with a fourth heat exchange channel 171 and a fifth heat exchange channel 172. One end of the second heat exchanger plate core 170 is penetrated through the second partition plate 141 to make one end of the fourth heat exchange channel 171 connected with the first liquid collecting channel, and the other end is used to pass the coolant, and one end of the first heat exchange channel 131 away from the separation shell 110 and one end of the second heat exchange channel 132 away from the separation shell 110 are both connected with one end of the fifth heat exchange channel 172.

[0070] In this embodiment, the liquid phase generated after cooling the first heat exchanger plate core 130 is further cooled by the second heat exchanger plate core 170, so that the gas-liquid two-phase on the secondary side is fully cooled to form a final coolant which is then used for heat exchange cooling of the air conditioner or outdoor heat exchange system.

[0071] Specifically, the length direction of the first heat exchanger plate core 130 is horizontal, and is also the extension direction of the third heat exchange channel 133, that is, the coolant flows horizontally in the third heat exchange channel 133, while the first heat exchange channel 131 and the second heat exchange channel 132 are vertical, so that the gas phase and the liquid phase from the top can fall vertically and exchange heat through the first heat exchange channel 131 and the second heat exchange channel 132.

[0072] Specifically, the length direction of the second heat exchanger plate core 170 is horizontal, and is also the extension direction of the fourth heat exchange channel 171 , that is, the coolant flows horizontally in the fourth heat exchange channel 171 , while the fifth heat exchange channel 172 is vertical, so that the liquid phase from the top can fall vertically and perform heat exchange through the fifth heat exchange channel 172 .

[0073] Specifically, the first heat exchanger plate core 130 and the second heat exchanger plate core are both long heat exchange plates, the first heat exchange channel 131, the second heat exchange channel 132, and the fifth heat exchange channel 172 are multiple heat exchange through holes opened vertically, the third heat exchange channel 133 and the fourth heat exchange channel 171 are multiple heat exchange through holes opened horizontally, the first heat exchanger plate core 130, the second heat exchange plate, and the third heat exchange channel 133 are not connected to each other, but heat is exchanged through the long heat exchange plate structure of the first heat exchanger plate core 130. The fourth heat exchanger plate core and the fifth heat exchange channel 172 are not connected to each other, but heat is exchanged through the long heat exchange plate structure of the second heat exchanger plate core 170.

[0074] Preferably, the gas-liquid separation heat exchanger 100 also includes a fifth partition 163, which is provided with an outflow hole 164. One end of the fifth partition 163 is connected to the second partition 141, and the other end is connected to the inner wall of the heat exchange shell 120. The secondary side liquid phase after being cooled by the first heat exchanger plate core 130 enters the second heat exchanger plate core 170 through the outflow hole 164 for heat exchange.

[0075] See also Figure 2 and Figure 3In one embodiment, the heat exchange housing 120 is provided with a first discharge hole 123 and a second discharge hole 124, the first liquid collecting channel is connected to the first discharge hole 123, and the end of the fifth heat exchange channel 172 away from the first heat exchanger plate core 130 is connected to the second discharge hole 124. Thus, the liquid phase of the secondary side after cooling is discharged through the second discharge hole 124 and then used for heat exchange cooling of the air conditioner or outdoor heat exchange system. The liquid phase of the coolant after the primary side is heated continues to be circulated after the first discharge hole 123.

[0076] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 further includes a first header 180 and a second header 181. One end of the first header 180 is connected to one end of the third heat exchange channel 133 away from the first header 180, and the other end is used to pass the coolant. One end of the second header 181 is connected to one end of the fourth heat exchange channel 171 away from the first header 180, and the other end is used to pass the coolant. Thus, the primary side coolant is passed into the third heat exchange channel 133 through the first header 180, and the primary side coolant is passed into the fourth heat exchange channel 171 through the second header 181. Specifically, the primary side coolant is synchronously passed into multiple heat exchange through holes opened horizontally, so as to achieve cooling stability and improve cooling and heat exchange efficiency.

[0077] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 further includes a first tube 182 and a second tube 183. The side wall of the first tube 182 is provided with a diverter hole 184. One end of the second tube 183 is connected to the diverter hole 184, and the other end is connected to an end of the second header 181 away from the fourth heat exchange flow channel 171. One end of the first tube 182 is used to pass the coolant, and the other end is connected to an end of the first header 180 away from the third heat exchange flow channel 133. Thus, the coolant is passed through one end of the first tube 182, so that the coolant is simultaneously passed into the first header 180 and the second header 181 at the same pressure, thereby achieving cooling stability and improving cooling heat exchange efficiency.

[0078] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 includes a valve 185, which is disposed on the second tube 183 and is used to open or block the second tube 183. When the secondary side liquid does not need to be further cooled and heat exchanged through the second heat exchanger plate core, the valve 185 can be closed to prevent the primary side coolant from being introduced into the second heat exchanger plate core. When the secondary side liquid needs to be further cooled and heat exchanged through the second heat exchanger plate core, the valve 185 can be opened to allow the primary side coolant to be introduced into the second heat exchanger plate core.

[0079] See also Figure 2 and Figure 3 In one embodiment, the gas-liquid separation heat exchanger 100 further includes a bracket 190, and the heat exchange shell 120 is disposed on the upper end of the bracket 190, and the separation shell 110 and the heat exchange shell 120 are lifted to the upper part of the bracket 190, thereby improving the cooling and heat dissipation efficiency.

[0080] See also Figure 4 , one embodiment of the present application further provides a gas-liquid separation heat exchange system 200, the gas-liquid separation heat exchange system 200 comprises: a plurality of modules to be cooled 210, a power module 220 and a gas-liquid separation heat exchanger 100. The modules to be cooled 210 each have a cooling inlet and a cooling outlet, the end of the first heat exchange channel 131 away from the separation shell, and the end of the second heat exchange channel 132 away from the separation shell 110 are both connected to the plurality of cooling inlets, and the plurality of cooling outlets are all connected to the liquid phase cavity. The power module 220 can be arranged between the cooling inlet and the gas-liquid separation heat exchanger 100, and the power module 220 can also be arranged between the cooling outlet and the gas-liquid separation heat exchanger 100.

[0081] See also Figure 2 and Figure 4 In the actual use of the gas-liquid separation heat exchange system 200, the coolant is continuously introduced into the third heat exchange channel 133, and the coolant is the coolant on the primary side, and the coolant enters the first liquid collecting channel 121. Then, the gas-liquid two-phase is introduced into the liquid phase cavity 114, wherein the gas-liquid two-phase is the gas phase and liquid phase on the secondary side for heat exchange and cooling the air conditioner or indoor heat exchange system, and the gas phase in the liquid phase cavity 114 enters the gas phase cavity 113 through the permeable membrane group 150, and the liquid phase on the secondary side exchanges heat with the coolant on the primary side in the third heat exchange channel 133 in the second heat exchange channel 132 and is cooled. The gas phase in the gas phase cavity 113 enters the air chamber 111 through the air hole 142, and then enters the first heat exchange channel 131. The gas phase on the secondary side in the first heat exchange channel 131 exchanges heat with the coolant on the primary side in the third heat exchange channel 133 and is cooled to become a liquid phase, and merges with the aforementioned cooled secondary side liquid phase, thereby completing the process of independent cooling and heat exchange of the gas and liquid phases on the secondary side, and finally merging. At the same time, during the heat exchange process, the gas and liquid phases are cooled simultaneously through the same first heat exchanger plate core 130. The merged secondary side coolant is then used to heat exchange and cool the module to be cooled. The gas-liquid two phases with a higher temperature formed after cooling return to the gas-liquid separation heat exchanger 100 for cooling, forming a coolant circulation, thereby realizing two-phase separation heat exchange by distributing the chamber in the shell, and performing synchronous heat exchange, while increasing the contact cross-sectional area of ​​the heat exchange channel, thereby improving the heat exchange characteristics.

[0082] Specifically, each module to be cooled 210 includes multiple groups of parts to be cooled 211, multiple cooling shells 212, liquid inlet pipes 213 and liquid outlet pipes 214. The multiple groups of parts to be cooled 211 correspond to the multiple cooling shells 212 one by one, and each group of parts to be cooled 211 is arranged in the cooling shell 212 one by one. The second discharge hole is connected to the multiple liquid inlet pipes 213, and the coolant cooled by the gas-liquid separation heat exchanger is introduced into the multiple cooling shells 212 in the corresponding module to be cooled 210 through the liquid inlet pipes 213. The inlet hole is connected to the multiple liquid outlet pipes 214, and the gas-liquid two-phase after cooling and heating in the multiple cooling shells 212 in the corresponding modules to be cooled 210 is refluxed to the inlet hole through the liquid outlet pipes 214, and then circulated and cooled through the gas-liquid separation heat exchanger, thereby realizing the coolant circulation of the gas-liquid separation heat exchange system 200.

[0083] The module to be cooled 210 may also be a plurality of two-phase flow cold plates 215, and the part to be cooled 211 may also be a server, a processor, a chip, etc. in the blade housing 216. Specifically, a switch valve 221 is provided between the liquid inlet and outlet pipes 213 and the gas-liquid separation heat exchanger, which can realize the flow rate and switch control of the coolant introduced into the module to be cooled 210. The liquid inlet and outlet pipes 213 are VCDU liquid inlet pipes, and the liquid outlet and outlet pipes 214 are VCDU liquid return pipes.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A gas-liquid separation heat exchanger, characterized in that: The gas-liquid separation heat exchanger comprises: a separation shell, a heat exchange shell, a first heat exchanger plate core, a first partition plate and a permeable membrane group; The separation shell is located at the upper end of the heat exchange shell and connected to the heat exchange shell, and the first partition is arranged in the separation shell and divides the internal space of the separation shell into an air chamber and a permeation chamber distributed in the horizontal direction; The permeable membrane group is located in the permeable chamber and divides the permeable chamber into a gas phase chamber and a liquid phase chamber. The first partition plate is provided with air holes to connect the gas chamber and the gas phase chamber. The permeable membrane group is used to allow the gas phase to enter the gas phase chamber from the liquid phase chamber. The liquid phase chamber is used to contain gas and liquid phases. The first heat exchanger plate core is located in the heat exchange shell and connected to the heat exchange shell; the first heat exchanger plate core has a first heat exchange channel, a second heat exchange channel and a third heat exchange channel that are independent of each other, one end of the first heat exchange channel is connected to the air chamber, one end of the second heat exchange channel is connected to the liquid phase cavity, the third heat exchange channel is used for circulation of cooling medium, and one end of the first heat exchange channel facing away from the separation shell is connected to one end of the second heat exchange channel facing away from the separation shell.

2. The gas-liquid separation heat exchanger according to claim 1, characterized in that: The gas-liquid separation heat exchanger further includes a second partition plate, which is located in the heat exchange shell and divides the heat exchange shell into a first liquid collecting flow channel and a second liquid collecting flow channel; Along the direction in which the third heat exchange channel extends, one end of the first heat exchanger plate core is penetrated through the second partition plate, and the other end is connected to the heat exchange shell; one end of the first heat exchange channel is connected to the air chamber, and the other end is connected to the second liquid collecting channel; one end of the second heat exchange channel is connected to the liquid phase cavity, and the other end is connected to the second liquid collecting channel; one end of the third heat exchange channel is used to pass the coolant, and the other end is connected to the first liquid collecting channel.

3. The gas-liquid separation heat exchanger according to claim 1, characterized in that: The permeable membrane group includes a plurality of permeable membranes connected in sequence, and two adjacent permeable membranes are arranged at an angle.

4. The gas-liquid separation heat exchanger according to claim 3, characterized in that: The gas-liquid separation heat exchanger further comprises a third partition plate, and the plurality of permeable membranes at least comprises a first permeable membrane, a second permeable membrane and a third permeable membrane; One end of the first permeable membrane is connected to the first partition, and the other end is connected to the inner wall of the separation shell; one end of the second permeable membrane is connected to the first partition, and the other end is connected to one end of the third permeable membrane, and the other end of the third permeable membrane is connected to the first partition; the first partition is provided with a first hole and a second hole, the first hole is for the gas phase between the first permeable membrane and the partition to pass through, and the second hole is for the gas phase between the second permeable membrane and the third permeable membrane to pass through; The third partition is connected to the inner wall of the separation shell and is spaced apart from the first partition, and one end of the second permeable membrane connected to the third permeable membrane is spaced apart from the inner wall of the separation shell.

5. The gas-liquid separation heat exchanger according to claim 4, characterized in that: The permeable membrane group also includes a covering permeable membrane. The first partition is provided with a third hole, and the third hole is located on a side of the third permeable membrane close to the first heat exchanger plate core. The covering permeable membrane covers the third hole to allow the gas phase on the side of the third permeable membrane close to the first heat exchanger plate core to pass through.

6. The gas-liquid separation heat exchanger according to claim 4, characterized in that: The gas-liquid separation heat exchanger also includes a fourth partition plate, which is provided with a fourth hole. The fourth partition plate is located between the third permeable membrane and the first heat exchanger plate core. The fourth partition plate is connected to the first partition plate and the inner wall of the separation shell at the same time, and the liquid phase enters the second heat exchange channel through the fourth hole.

7. The gas-liquid separation heat exchanger according to claim 2, characterized in that: The gas-liquid separation heat exchanger also includes a second heat exchanger plate core located in the heat exchange shell, and the second heat exchanger plate core is provided with a fourth heat exchange channel and a fifth heat exchange channel. One end of the second heat exchanger plate core is passed through the second partition plate to connect one end of the fourth heat exchange channel with the first liquid collecting channel, and the other end is used to pass coolant, and one end of the first heat exchange channel away from the separation shell and one end of the second heat exchange channel away from the separation shell are both connected to one end of the fifth heat exchange channel.

8. The gas-liquid separation heat exchanger according to claim 7, characterized in that: The heat exchange shell is provided with a first discharge hole and a second discharge hole, the first liquid collecting channel is communicated with the first discharge hole, and the end of the fifth heat exchange channel away from the first heat exchanger plate core is communicated with the second discharge hole.

9. The gas-liquid separation heat exchanger according to claim 7, characterized in that: The gas-liquid separation heat exchanger further comprises a first header and a second header, one end of the first header is connected to an end of the third heat exchange flow channel away from the first header, and the other end is used for passing coolant; One end of the second header is communicated with an end of the fourth heat exchange flow channel away from the first header, and the other end is used for passing coolant.

10. The gas-liquid separation heat exchanger according to claim 9, characterized in that: The gas-liquid separation heat exchanger further comprises a first tube, a second tube and a valve, the side wall of the first tube is provided with a diverter hole, one end of the second tube is connected to the diverter hole, and the other end is connected to an end of the second header away from the fourth heat exchange flow channel; One end of the first tube is used for passing coolant, and the other end is connected to an end of the first header away from the third heat exchange flow channel. The valve is arranged on the second tube to open or block the second tube.

11. A gas-liquid separation heat exchange system, characterized in that: The gas-liquid separation heat exchange system comprises: a plurality of groups of modules to be cooled, a power module and a gas-liquid separation heat exchanger according to any one of claims 1 to 10; The modules to be cooled each have a cooling inlet and a cooling outlet, one end of the first heat exchange channel away from the separation shell and one end of the second heat exchange channel away from the separation shell are both in communication with the plurality of cooling inlets, and the plurality of cooling outlets are in communication with the liquid phase cavity; The power module is arranged between the cooling inlet and the gas-liquid separation heat exchanger and / or the power module is arranged between the cooling outlet and the gas-liquid separation heat exchanger.

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