Evaporator, temperature control device and heat exchange system

Abstract

The application provides an evaporator, a temperature control device and a heat exchange system. The evaporator comprises upper headers, middle headers and lower headers arranged at intervals, a plurality of flat tubes are arranged at intervals between the upper headers and the middle headers and between the middle headers and the lower headers, the extension directions of the upper headers, the middle headers and the lower headers are the same, the extension directions of the plurality of flat tubes intersect with the extension directions of the upper headers and the lower headers, each flat tube of the plurality of flat tubes has a through channel in the extension direction of the flat tube, the middle header comprises a main body pipe and a partition plate, and the lower header and the main body pipe and the upper header and the main body pipe are fixedly connected through the plurality of flat tubes.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and in particular to an evaporator, temperature control device and heat exchange system. Background Technology

[0002] Microchannel heat exchangers are now widely used in data centers and other applications for temperature control. Microchannel heat exchangers have a unique flat tube shape with multiple channels. When used as an evaporator, the flat tube is typically placed vertically along the direction of gravity to prevent condensate from accumulating and causing condensation buildup. In temperature control scenarios like data centers, evaporators are often quite tall vertically, resulting in excessively long flat tubes. The heat exchange medium is often a superheated gas after heat exchange in the evaporator. To facilitate gas venting, the evaporator tube usually has a liquid inlet at the bottom and an exhaust outlet at the top. Due to the long length of the flat tube, the liquid content of the heat exchange medium at the top of the evaporator is close to zero, or even superheated gas, reducing the heat exchange capacity at the top and causing the temperature at the top to be higher than the bottom. This reduces the heat exchange effect of the microchannel heat exchanger and limits its efficiency. Summary of the Invention

[0003] This application provides an evaporator, temperature control device, and heat exchange system that can improve heat exchange efficiency.

[0004] In a first aspect, this application provides an evaporator, including an upper manifold, a middle manifold, and a lower manifold arranged at intervals. Multiple flat tubes are arranged at intervals between the upper manifold and the middle manifold, and between the middle manifold and the lower manifold. The upper manifold, the middle manifold, and the lower manifold extend in the same direction. The extension directions of the multiple flat tubes intersect the extension directions of the upper manifold and the lower manifold. Each of the multiple flat tubes has a through channel in its extension direction. The middle manifold includes a main tube and a partition. The lower manifold is located between the lower manifold and the main tube. The upper manifold and the main body pipe are fixedly connected by multiple flat tubes. The partition is housed inside the main body pipe and extends along the extension direction of the main body pipe. The partition and the inner wall of the main body pipe together form an exhaust channel and a liquid inlet channel. The lower manifold, the exhaust channel, the liquid inlet channel, and the upper manifold are arranged along the extension direction of the flat tubes. The exhaust channel, the flat tube between the lower manifold and the main body pipe, and the lower manifold are interconnected. The liquid inlet channel, the flat tube between the main body pipe and the upper manifold, and the upper manifold are interconnected.

[0005] The inlet channel, the flat tube between the main pipe and the upper manifold, and the upper manifold are interconnected to form the first flow channel. The exhaust channel, the flat tube between the lower manifold and the main pipe, and the lower manifold are interconnected to form the second flow channel. The first and second flow channels are independent and do not interfere with each other. The first and second flow channels are used to circulate the heat exchange medium.

[0006] When the evaporator is in use, the extension direction of the flat tubes is roughly the same as the direction of gravity, and the upper manifold is located roughly at the top of the evaporator. The evaporator includes a first flow channel and a second flow channel for the heat exchange medium. In other words, the evaporator consists of two independent heat exchange sections, which share a central manifold. Compared to conventional evaporators that do not have separate first and second flow channels, this design shortens the distance the heat exchange medium travels in the extension direction of the flat tubes, reduces the heat exchange area of ​​the gaseous heat exchange medium in the first and second flow channels, helps reduce cold loss, thereby reducing the temperature difference between the upper and lower manifolds, improving the temperature uniformity of the evaporator's heat exchange, and increasing the evaporator's heat exchange efficiency.

[0007] In addition, the evaporator is divided into two independent flow channels: a first flow channel and a second flow channel. This way, if one flow channel of the evaporator malfunctions and cannot work properly, the other flow channel can still work normally.

[0008] According to the first aspect, in one possible implementation of this application, the central manifold further includes a plurality of heat-insulating gaps spaced apart along the extension direction of the main pipe, the heat-insulating gaps penetrating the pipe wall of the main pipe and the partition in a direction different from the extension direction of the partition, the heat-insulating gaps being spaced apart from the liquid inlet channel, and the heat-insulating gaps being spaced apart from the exhaust channel.

[0009] Insulation gaps can reduce the possibility of heat conduction between the exhaust channel and the liquid inlet channel through the partition, thereby reducing the loss of cooling capacity when the evaporator is in use.

[0010] According to the first aspect, in one possible implementation of this application, the evaporator further includes an upper liquid inlet pipe, which passes through the liquid inlet channel along the extension direction of the main body pipe and is fixedly connected to the main body pipe. A plurality of diversion holes are formed on the wall of the upper liquid inlet pipe along the extension direction of the upper liquid inlet pipe. The diversion holes penetrate the wall of the upper liquid inlet pipe, are connected to the liquid inlet channel, and are connected to the cavity of the upper liquid inlet pipe.

[0011] The diversion holes in the upper liquid inlet pipe are used to divert the heat exchange medium, thereby improving the uniformity of the heat exchange medium flow between the liquid inlet channel and the upper liquid inlet pipe along the extension direction of the upper liquid inlet pipe.

[0012] According to a first aspect, in one possible implementation of this application, the evaporator further includes at least one flow divider plate, which is housed within the liquid inlet channel and connected to the inner wall of the liquid inlet channel. The at least one flow divider plate is sleeved outside the upper liquid inlet pipe. The at least one flow divider plate, the inner wall of the liquid inlet channel, and the upper liquid inlet pipe form at least two interconnected flow divider cavities, which are arranged along the extension direction of the main tube.

[0013] The inlet channel is divided into multiple independent flow chambers by multiple flow dividers to improve the uniformity of the heat exchange medium distribution in the inlet channel along the extension direction of the main tube, thereby improving the heat exchange efficiency of the first flow channel formed between the upper manifold, the flat tube between the upper manifold and the main tube, and the inlet channel.

[0014] According to the first aspect, in one possible implementation of this application, the evaporator further includes a lower liquid inlet pipe, which passes through the lower manifold along its extension direction and is fixedly connected to it. A plurality of diversion holes are formed on the wall of the lower liquid inlet pipe along its extension direction. The diversion holes penetrate the wall of the lower liquid inlet pipe and communicate with the cavity of the lower manifold.

[0015] The diversion holes in the lower inlet pipe are used to divert the heat exchange medium, thereby improving the uniformity of the heat exchange medium flow between the lower manifold and the lower inlet pipe along the extension direction of the lower inlet pipe.

[0016] According to the first aspect, in one possible implementation of this application, the evaporator further includes at least one flow divider plate, which is housed within the lower manifold and connected to the inner wall of the lower manifold. The at least one flow divider plate is sleeved outside the lower liquid inlet pipe. The at least one flow divider plate, the inner wall of the lower manifold, and the lower liquid inlet pipe form at least two interconnected flow divider cavities, which are arranged along the extension direction of the lower manifold.

[0017] The lower manifold is divided into multiple independent flow chambers by multiple flow dividers to improve the uniformity of the heat exchange medium distribution in the lower manifold along its extension direction, thereby improving the heat exchange efficiency of the second flow channel formed between the lower manifold, the flat tube between the lower manifold and the main pipe, and the exhaust channel.

[0018] According to the first aspect, in one possible implementation of this application, the upper manifold has a plurality of first mounting through holes on the pipe wall on the side facing the main pipe along the extension direction of the upper manifold, and each of the plurality of flat pipes between the upper manifold and the main pipe is fixedly inserted into a corresponding first mounting through hole.

[0019] By fixing the flat tube between the upper manifold and the main body tube through the first mounting through hole on the upper manifold, the flat tube between the upper manifold and the main body tube is fixedly connected and communicated with the upper manifold, which helps to simplify the assembly of the evaporator.

[0020] According to the first aspect, in one possible implementation of this application, the main tube has a plurality of second mounting through holes on the tube wall facing the upper manifold along the extension direction of the main tube, and each of the plurality of flat tubes between the upper manifold and the main tube is fixedly inserted into a corresponding second mounting through hole.

[0021] By fixing the flat tube between the upper manifold and the main body tube through the second mounting through hole on the main body tube, the flat tube between the upper manifold and the main body tube is fixedly connected and communicated with the main body tube, which helps to simplify the assembly of the evaporator.

[0022] According to the first aspect, in one possible implementation of this application, the main tube has a plurality of third mounting through holes on the tube wall facing the lower manifold along the extension direction of the main tube, and each of the plurality of flat tubes between the lower manifold and the main tube is fixedly inserted into a corresponding third mounting through hole.

[0023] By fixing the flat tube between the lower manifold and the main body tube through the third mounting through hole on the main body tube, the flat tube between the lower manifold and the main body tube is fixedly connected and communicated with the main body tube, which helps to simplify the assembly of the evaporator.

[0024] According to the first aspect, in one possible implementation of this application, the lower manifold has a plurality of fourth mounting through holes on the pipe wall facing the main pipe along the extension direction of the lower manifold, and each of the plurality of flat pipes between the lower manifold and the main pipe is fixedly inserted into a corresponding fourth mounting through hole.

[0025] By fixing the flat tube between the lower manifold and the main body tube through the fourth mounting through hole on the lower manifold, the flat tube between the lower manifold and the main body tube is fixedly connected and communicated with the lower manifold, which helps to simplify the assembly of the evaporator.

[0026] According to the first aspect, in one possible implementation of this application, the evaporator further includes a condensate pan, which protrudes from the outer wall of the main tube and extends along the extension direction of the main tube, and the condensate pan is provided with a drain outlet.

[0027] When the evaporator is working, under high humidity conditions, condensation forms on the outer surface of the flat tube between the upper manifold and the main tube. The condensation droplets condense into large water droplets that flow down the flat tube between the upper manifold and the main tube and collect in the condensation pan along the outer wall of the main tube.

[0028] According to the first aspect, in one possible implementation of this application, the condensate pan includes a first end and a second end in the extension direction of the central manifold, and the drain outlet is located at the second end;

[0029] In the extension direction of the flat tube, the shortest distance from the first end to the lower manifold is greater than the shortest distance from the second end to the lower manifold.

[0030] In the extension direction of the flat tube, the shortest distance from the first end to the lower manifold is greater than the shortest distance from the second end to the lower manifold. In other words, the condensate pan is inclined relative to the extension direction of the middle manifold. Because the condensate pan is inclined relative to the extension direction of the middle manifold, under the action of gravity, the condensate collects at the second end where the drain outlet is located and is then discharged through the drain outlet, thus improving the drainage efficiency of the evaporator.

[0031] Secondly, embodiments of this application also provide a temperature control device, including a throttling device, an evaporator according to the first aspect, a compressor, and a condenser connected in sequence, wherein the condenser is connected to the throttling device.

[0032] Thirdly, embodiments of this application also provide a heat exchange system, including a working device and the temperature control device described in the second aspect, wherein the temperature control device is used to adjust the temperature of the working device. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a heat exchange system provided in one embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the structure of a temperature control device for a heat exchange system provided in an embodiment of this application;

[0035] Figure 3 This is a perspective view of an evaporator provided in an embodiment of this application;

[0036] Figure 4 for Figure 3 A schematic diagram of the evaporator from another perspective;

[0037] Figure 5 This is a schematic diagram of the structure of an evaporator provided in one embodiment of this application;

[0038] Figure 6 This is an enlarged schematic diagram of a partial area of ​​an evaporator provided in an embodiment of this application;

[0039] Figure 7 For along Figure 6 A schematic diagram of the cross section of line AA;

[0040] Figure 8 For along Figure 6 A schematic cross-sectional view of line BB;

[0041] Figure 9 For along Figure 6 A schematic cross-sectional view of line CC;

[0042] Figure 10 For along Figure 6 A schematic cross-sectional view of line DD;

[0043] Figure 11 for Figure 3 The diagram shows a magnified view of the local area.

[0044] Figure 12 for Figure 11 The top view of the evaporator shown;

[0045] Figure 13 for Figure 11 The evaporator shown is a side view. Detailed Implementation

[0046] Microchannel heat exchangers are now widely used in data centers and other applications for temperature control. Microchannel heat exchangers have a unique flat tube shape with multiple microchannels. When used as an evaporator, the flat tube is typically placed vertically along the direction of gravity to prevent condensate from accumulating and causing condensation buildup. In temperature control scenarios like data centers, evaporators are often quite tall vertically, resulting in excessively long flat tubes. The heat exchange medium is often a superheated gas after heat exchange in the evaporator. To facilitate gas exhaust, the evaporator tube usually has liquid inlet at the bottom and exhaust at the top. Due to the long length of the flat tube, the liquid content of the heat exchange medium at the top of the evaporator is close to zero, or even superheated gas, reducing the heat exchange capacity at the top. This causes the temperature at the top to be higher than at the bottom, reducing the heat exchange effect and limiting the efficiency of the microchannel heat exchanger.

[0047] Based on this, embodiments of this application provide an evaporator, a temperature control device, and a heat exchange system. An evaporator with a shared manifold includes an upper manifold, a middle manifold, and a lower manifold arranged at intervals. Multiple flat tubes are arranged at intervals between the upper and middle manifolds, and between the middle and lower manifolds. The upper, middle, and lower manifolds extend in the same direction. The extension directions of the multiple flat tubes intersect the extension directions of the upper and lower manifolds. Each of the multiple flat tubes has a through channel in its extension direction. The middle manifold includes a main tube and a partition. The lower manifold is connected to the main tube. The upper manifold and the main body pipe are fixedly connected by multiple flat tubes. The partition is housed inside the main body pipe and extends along the extension direction of the main body pipe. The partition and the inner wall of the main body pipe together form an exhaust channel and a liquid inlet channel. The lower manifold, the exhaust channel, the liquid inlet channel, and the upper manifold are arranged along the extension direction of the flat tubes. The exhaust channel, the flat tube between the lower manifold and the main body pipe, and the lower manifold are interconnected. The liquid inlet channel, the flat tube between the main body pipe and the upper manifold, and the upper manifold are interconnected.

[0048] Please see Figure 1 The heat exchange system 1 includes a working device 12 and a temperature control device 10, which is used to regulate the temperature of the working device 12. In this embodiment, the working device 12 generates heat during operation, and the temperature control device 10 is used to dissipate heat from the working device 12.

[0049] In one embodiment, the heat exchange system 1 is a cabinet, container, or data center, and the working equipment 12 is a server, baseband processing unit, lithium battery, or power supply, etc. The power supply refers to a switching power supply, used to rectify AC mains power into DC power to supply power to the electrical equipment. The lithium battery includes a single cell or a battery pack. Lithium batteries are used individually to supply power to the electrical equipment when the mains power fails. Lithium batteries are also used in photovoltaic energy storage scenarios for daytime energy storage and nighttime discharge.

[0050] Please see Figure 2The temperature control device 10 includes a housing 100, an evaporator 300, a compressor 400, a condenser 500, and a throttling device 600. The evaporator 300 is connected to the compressor 400 via a pipeline, the compressor 400 is connected to the condenser 500 via a pipeline, the condenser 500 is connected to the throttling device 600 via a pipeline, and the throttling device 600 is connected to the evaporator 300 via a pipeline. The evaporator 300, compressor 400, condenser 500, and throttling device 600 form a heat exchange loop where the heat exchange medium can circulate. The evaporator 300 cools the hot air flowing to its surface and heats the heat exchange medium inside the evaporator 300. The compressor 400 compresses the heat exchange medium flowing into its interior. The condenser 500 is used to heat the cold air flowing to its surface, and the cold air on the surface of the condenser 500 cools the heat exchange medium inside the condenser 500. The throttling device 600 is used to regulate the flow rate of the heat exchange medium.

[0051] Please see Figure 3 and Figure 4 The evaporator 300 includes an upper manifold 31, a middle manifold 32, and a lower manifold 33 arranged at intervals. Multiple flat tubes 34 are arranged at intervals between the upper manifold 31 and the middle manifold 32, and between the middle manifold 32 and the lower manifold 33. The upper manifold 31, the middle manifold 32, and the lower manifold 33 extend in the same direction, while the multiple flat tubes 34 extend in directions intersecting the extension directions of the upper manifold 31 and the lower manifold 33. (See also...) Figure 5 Each of the multiple flat tubes 34 has a through channel 341 extending in the direction of its extension. The evaporator 300 can be a microchannel heat exchanger, etc.

[0052] Please refer to the following: Figure 5 , Figure 6 and Figure 7 The middle manifold 32 includes a main pipe 321 and a partition 323. The lower manifold 33 is fixedly connected to the main pipe 321, and the upper manifold 31 is fixedly connected to the main pipe 321 via multiple flat tubes 34. The partition 323 is housed within the main pipe 321 and extends along its extension direction. The partition 323 and the inner wall of the main pipe 321 together form an exhaust channel 325 and a liquid inlet channel 327. The lower manifold 33, exhaust channel 325, liquid inlet channel 327, and upper manifold 31 are arranged along the extension direction of the flat tubes 34. The exhaust channel 325, the channel 341 of the flat tube 34 between the lower manifold 33 and the main pipe 321, and the lower manifold 33 are interconnected. The liquid inlet channel 327, the channel 341 of the flat tube 34 between the main pipe 321 and the upper manifold 31, and the upper manifold 31 are interconnected.

[0053] The liquid inlet channel 327, the channel 341 of the flat tube 34 between the main pipe 321 and the upper manifold 31, and the upper manifold 31 are interconnected to form a first flow channel. The exhaust channel 325, the channel 341 of the flat tube 34 between the lower manifold 33 and the main pipe 321, and the lower manifold 33 are interconnected to form a second flow channel. The first flow channel and the second flow channel are independent of each other and do not interfere with each other. The first flow channel and the second flow channel are used to circulate the heat exchange medium.

[0054] The lower manifold 33 and the liquid inlet channel 327 are both used to connect to the throttling device 600 to receive the heat exchange medium from the throttling device 600. The exhaust channel 325 and the upper manifold 31 are both used to connect to the compressor 400 to deliver the heat exchange medium to the compressor 400.

[0055] When the evaporator 300 is in use, the extension direction of the flat tube 34 is approximately the same as the direction of gravity, and the upper manifold 31 is approximately located at the top of the evaporator 300. The evaporator 300 includes a first flow channel and a second flow channel for circulating the heat exchange medium. In other words, the evaporator 300 includes two independent heat exchange sections, which share a central manifold 32. Compared to conventional evaporators that are not divided into independent first and second flow channels, this design shortens the distance the heat exchange medium needs to flow in the extension direction of the flat tube 34, reduces the heat exchange area of ​​the gaseous heat exchange medium in the first and second flow channels, helps to reduce cold loss, thereby reducing the temperature difference between the upper manifold 31 and the lower manifold 33, improving the temperature uniformity of the heat exchange in the evaporator 300, and increasing the heat exchange efficiency of the evaporator 300.

[0056] In addition, the evaporator 300 is divided into two independent flow channels: a first flow channel and a second flow channel. In this way, if one flow channel of the evaporator 300 malfunctions and cannot work properly, the other flow channel can still work properly, and the heat exchange system 1 can still work.

[0057] Please refer again to some embodiments of this application. Figure 5Multiple first mounting through holes 311 are provided on the pipe wall of the upper manifold 31 facing the middle manifold 32 along the extension direction of the upper manifold 31. One end of each of the multiple flat tubes 34 between the upper manifold 31 and the main pipe 321 is fixedly inserted into a corresponding first mounting through hole 311, realizing the fixed connection between the upper manifold 31, the flat tubes 34 between the upper manifold 31 and the main pipe 321, and the main pipe 321, as well as the fluid interconnection between the upper manifold 31, the flat tubes 34 between the upper manifold 31 and the middle manifold 32, and the liquid inlet channel 327 of the middle manifold 32. By fixing the flat tubes 34 between the upper manifold 31 and the main pipe 321 through the first mounting through holes 311 on the upper manifold 31, the fixed connection and communication between the flat tubes 34 between the upper manifold 31 and the main pipe 321 and the upper manifold 31 are realized, which helps to simplify the assembly of the evaporator 300. It is understood that this application does not limit the connection method between the flat pipe 34 between the upper manifold 31 and the main pipe 321 and the upper manifold 31. For example, the flat pipe 34 between the upper manifold 31 and the main pipe 321 and the upper manifold 31 can be connected and communicated by connecting pipes.

[0058] Please refer again to some embodiments of this application. Figure 5 On the side of the main pipe 321 facing the upper manifold 31, multiple second mounting through holes 3212 are provided along the extension direction of the main pipe 321. Each of the multiple flat tubes 34 between the upper manifold 31 and the main pipe 321 is fixedly inserted into a corresponding second mounting through hole 3212, realizing the fixed connection between the upper manifold 31, the flat tubes 34 between the upper manifold 31 and the main pipe 321, and the main pipe 321, as well as the fluid interconnection between the upper manifold 31, the flat tubes 34 between the upper manifold 31 and the middle manifold 32, and the liquid inlet channel 327 of the middle manifold 32. By fixing the flat tubes 34 between the upper manifold 31 and the main pipe 321 through the second mounting through holes 3212 on the main pipe 321, the fixed connection and communication between the flat tubes 34 between the upper manifold 31 and the main pipe 321 and the upper manifold 31 are realized, which helps to simplify the assembly of the evaporator 300. It is understood that this application does not limit the connection method between the flat pipe 34 and the main pipe 321 between the upper manifold 31 and the main pipe 321. For example, the flat pipe 34 and the main pipe 321 can be connected and communicated by connecting pipes.

[0059] Please refer again to some embodiments of this application. Figure 5On the side of the main pipe 321 facing the lower manifold 33, multiple third mounting through holes 3214 are provided along the extension direction of the main pipe 321. Each of the multiple flat tubes 34 between the lower manifold 33 and the main pipe 321 is fixedly inserted into a corresponding third mounting through hole 3214, realizing the fixed connection between the lower manifold 33, the flat tubes 34 between the lower manifold 33 and the main pipe 321, and the main pipe 321, as well as the fluid interconnection between the lower manifold 33, the flat tubes 34 between the lower manifold 33 and the main pipe 321, and the main pipe 321. By fixing the flat tubes 34 between the lower manifold 33 and the main pipe 321 through the third mounting through holes 3214 on the main pipe 321, the fixed connection and communication between the flat tubes 34 between the lower manifold 33 and the main pipe 321 and the main pipe 321 are realized, which helps to simplify the assembly of the evaporator 300. It is understood that this application does not limit the connection method between the flat pipe 34 and the main pipe 321 between the lower manifold 33 and the main pipe 321. For example, the flat pipe 34 and the main pipe 321 between the lower manifold 33 and the main pipe 321 can be connected and communicated by connecting pipes.

[0060] Please refer again to some embodiments of this application. Figure 5 The lower manifold 33 has multiple fourth mounting through holes 331 on its wall facing the main pipe 321 along its extension direction. Each of the multiple flat tubes 34 between the lower manifold 33 and the main pipe 321 is fixedly inserted into a corresponding fourth mounting through hole 331, thus achieving a fixed connection between the lower manifold 33, the flat tubes 34 between the lower manifold 33 and the main pipe 321, and the main pipe 321, as well as fluid communication between the lower manifold 33, the flat tubes 34 between the lower manifold 33 and the main pipe 321, and the main pipe 321. By fixing the flat tubes 34 between the lower manifold 33 and the main pipe 321 through the fourth mounting through holes 331 on the lower manifold 33, a fixed connection and communication between the flat tubes 34 between the lower manifold 33 and the main pipe 321 and the lower manifold 33 is achieved, which simplifies the assembly of the evaporator 300.

[0061] It is understood that this application does not limit the connection method between the flat pipe 34 and the main pipe 321 between the lower manifold 33 and the main pipe 321. For example, the flat pipe 34 and the main pipe 321 between the lower manifold 33 and the main pipe 321 can be connected and communicated by connecting pipes.

[0062] For some embodiments of this application, please refer to the relevant documentation. Figure 5 , Figure 6 and Figure 8The central manifold 32 also includes multiple heat-insulating gaps 328 spaced apart along the extension direction of the main pipe 321. These heat-insulating gaps 328 penetrate the wall of the main pipe 321 and the partition 323 in a direction different from the extension direction of the partition 323. The heat-insulating gaps 328 are spaced apart from the liquid inlet channel 327 and the exhaust channel 325. The heat-insulating gaps 328 reduce the possibility of heat conduction between the exhaust channel 325 and the liquid inlet channel 327 through the partition 323, thereby reducing the cooling loss during the operation of the evaporator 300.

[0063] In some embodiments of this application, heat dissipation fins (not shown) may be provided between the plurality of flat tubes 34 between the upper manifold 31 and the main body tube 321, and / or, heat dissipation fins (not shown) may also be provided between the plurality of flat tubes 34 between the lower manifold 33 and the main body tube 321, to enhance the heat exchange efficiency of the evaporator 300. The number of channels on the flat tubes 34 may be multiple.

[0064] For some embodiments of this application, please refer to the relevant documentation. Figure 5 , Figure 6 , Figure 9 and Figure 10 The evaporator 300 also includes an upper liquid inlet pipe 35. The upper liquid inlet pipe 35 extends along the main body pipe 321 through the liquid inlet channel 327 and is fixedly connected to the main body pipe 321. Multiple diversion holes 351 are formed on the wall of the upper liquid inlet pipe 35 along its extension direction. The diversion holes 351 penetrate the wall of the upper liquid inlet pipe 35, are connected to the liquid inlet channel 327, and are also connected to the cavity of the upper liquid inlet pipe 35. The diversion holes 351 of the upper liquid inlet pipe 35 are used to divert the heat exchange medium, thereby improving the uniformity of the heat exchange medium flow between the liquid inlet channel 327 and the upper liquid inlet pipe 35 along its extension direction. One end of the upper liquid inlet pipe 35 protrudes from one end of the main body pipe 321. The upper liquid inlet pipe 35 is connected to the throttling device 600 via a pipe and is used to input a two-phase heat exchange working fluid. It can be understood that one end of the upper liquid inlet pipe 35 may not protrude from the main body pipe 321. For example, an opening is provided at one end of the main body pipe 321, and the upper liquid inlet pipe 35 is connected to this opening. The opening of the main body pipe 321 is then connected to the throttling device 600 via a pipe.

[0065] For some embodiments of this application, please refer to the relevant documentation. Figure 5 , Figure 6 , Figure 9The evaporator 300 also includes multiple flow dividers 36. These flow dividers 36 are housed within and connected to the inner wall of the liquid inlet channel 327. They are also sleeved around the upper liquid inlet pipe 35. The flow dividers 36, the inner wall of the liquid inlet channel 327, and the upper liquid inlet pipe 35 form multiple interconnected flow dividers 360, which are arranged along the extension direction of the main tube 321. By dividing the liquid inlet channel 327 into multiple independent flow dividers 360 using the multiple flow dividers 36, the uniformity of the heat exchange medium distribution within the liquid inlet channel 327 along the extension direction of the main tube 321 is improved. This, in turn, enhances the heat exchange efficiency of the first flow channel formed between the upper manifold 31, the flat tube 34 between the upper manifold 31 and the main tube 321, and the liquid inlet channel 327. It is understood that the number of flow dividers 36 can be one or two, that is, the number of flow dividers 36 can be at least one. At least one flow divider 36 is housed in the liquid inlet channel 327 and connected to the inner wall of the liquid inlet channel 327. At least one flow divider 36 is sleeved on the upper liquid inlet pipe 35. At least one flow divider 36, the inner wall of the liquid inlet channel 327, and the upper liquid inlet pipe 35 form at least two interconnected flow dividers 360. At least two interconnected flow dividers 360 are arranged along the extension direction of the main tube 321.

[0066] The two-phase heat exchange medium output from the throttling device 600 enters the upper inlet pipe 35 through the opening, passes through the diversion hole 351 into the inlet channel 327, and then enters the channel 341 of the flat tube 34 between the main pipe 321 and the upper manifold 31. Because the indoor hot air outside the flat tube 34 between the main pipe 321 and the upper manifold 31 exchanges heat with the two-phase heat exchange medium in the channel 341, the two-phase heat exchange medium is converted into a gaseous heat exchange medium. The gaseous heat exchange medium is then output through the upper manifold 31 to the compressor 400 and then to the condenser 500.

[0067] Please refer again to some embodiments of this application. Figure 5The evaporator 300 also includes a lower liquid inlet pipe 37. The lower liquid inlet pipe 37 extends along the lower manifold 33 and is fixedly connected to it. Multiple diversion holes 371 are formed on the wall of the lower liquid inlet pipe 37 along its extension direction. These diversion holes 371 penetrate the wall of the lower liquid inlet pipe 37 and communicate with the cavity of the lower manifold 33. The diversion holes 371 of the lower liquid inlet pipe 37 are used to divert the heat exchange medium, thereby improving the uniformity of the heat exchange medium flow between the lower manifold 33 and the lower liquid inlet pipe 37 along its extension direction. One end of the lower inlet pipe 37 protrudes from one end of the lower manifold 33. The lower inlet pipe 37 is connected to the throttling device 600 via a pipe and is used to input a two-phase heat exchange medium. It is understood that one end of the lower inlet pipe 37 may not protrude from the lower manifold 33. For example, an opening is provided at one end of the lower manifold 33, and the lower inlet pipe 37 is connected to this opening. The opening of the lower inlet pipe 37 is then connected to the throttling device 600 via a pipe.

[0068] In some embodiments of this application, the evaporator 300 further includes a plurality of flow dividers 38. The plurality of flow dividers 38 are housed within the lower manifold 33 and connected to the inner wall of the lower manifold 33. The plurality of flow dividers 38 are sleeved outside the lower liquid inlet pipe 37. The plurality of flow dividers 38, the inner wall of the lower manifold 33, and the lower liquid inlet pipe 37 form a plurality of interconnected flow dividers 380, which are arranged along the extension direction of the lower manifold 33. By dividing the cavity of the lower manifold 33 into a plurality of independent flow dividers 380 through the plurality of flow dividers 38, the uniformity of the heat exchange medium distribution within the lower manifold 33 along its extension direction is improved, thereby increasing the heat exchange efficiency of the lower manifold 33, the second flow channel formed between the flat tube 34 between the lower manifold 33 and the main pipe 321, and the exhaust channel 325. It is understood that the number of flow dividers 38 can be one or two, that is, the number of flow dividers 38 can be at least one. At least one flow divider 38 is housed in the lower manifold 33 and connected to the inner wall of the lower manifold 33. At least one flow divider 38 is sleeved on the lower inlet pipe 37. At least one flow divider 38, the inner wall of the lower manifold 33, and the lower inlet pipe 37 form at least two interconnected flow dividers 380. The at least two interconnected flow dividers 380 are arranged along the extension direction of the lower manifold 33.

[0069] The two-phase heat exchange medium output from the throttling device 600 enters the lower inlet pipe 37 through its opening, passes through the diversion hole 371 into the cavity of the lower manifold 33, and then enters the channel 341 of the flat tube 34 between the main pipe 321 and the lower manifold 33. Because the indoor hot air outside the flat tube 34 between the main pipe 321 and the lower manifold 33 exchanges heat with the two-phase heat exchange medium in the channel 341, the two-phase heat exchange medium is converted into a gaseous heat exchange medium. The gaseous heat exchange medium is then output to the compressor 400 and then to the condenser 500 via the exhaust channel 325.

[0070] It is understood that the liquid inlet channel 327 can be connected to the throttling device 600 of the first temperature control device 10, the upper manifold 31 can be connected to the compressor 400 of the first temperature control device 10, the opening of the lower liquid inlet pipe 37 can be connected to the throttling device 600 of the second temperature control device 10, and the exhaust channel 325 can be connected to the compressor 400 of the second temperature control device 10. That is, the two temperature control devices 10 can share the same evaporator 300, which is beneficial to improve the heat exchange efficiency of the heat exchange system 1 while reducing the space occupied by the heat exchange system 1.

[0071] It is understood that the number of upper manifolds 31 of the evaporator 300 can be two or more, the number of common manifolds 33 of the evaporator 300 can be two or more, the number of lower manifolds 33 of the evaporator 300 can be two or more, the common manifolds 33 and the upper manifolds 31 are connected by flat pipes 34, and the common manifolds 33 and the lower manifolds 33 are connected by flat pipes 34.

[0072] Please see Figure 11 , Figure 12 and Figure 13 The evaporator 300 also includes a condensate pan 39, which protrudes from the outer wall of the main tube 321 and extends along the extension direction of the main tube 321. The condensate pan 39 is used to collect condensate. A drain outlet 391 is provided on the condensate pan 39 for draining condensate. It can be understood that the condensate pan 39 and the main tube 321 can be integrally installed, or they can be separate components.

[0073] The condensate pan 39 includes a first end 393 and a second end 394 in the extension direction of the central manifold 32, with a drain outlet 391 located at the second end 394. In the extension direction of the flat pipe 34, the shortest distance from the first end 393 to the lower manifold 33 is greater than the shortest distance from the second end 394 to the lower manifold 33. In other words, the condensate pan 39 is inclined relative to the extension direction of the central manifold 32, which facilitates the discharge of condensate collected in the condensate pan 39 from the drain outlet 391.

[0074] When the evaporator 300 is operating, under high humidity conditions, condensation forms on the outer surface of the flat tube 34 between the upper manifold 31 and the main tube 321. The condensate droplets condense into larger water droplets that flow down the flat tube 34 between the upper manifold 31 and the main tube 321 and collect in the condensate pan 39 along the outer wall of the main tube 321. Because the condensate pan 39 is inclined relative to the extension direction of the middle manifold 32, under the action of gravity, the condensate collects at the second end 394 where the drain outlet 391 is located and is then discharged through the drain outlet 391, improving the drainage efficiency of the evaporator 300. High humidity conditions refer to an environment where condensation can form on the outer wall of the flat tube 34.

[0075] In addition, since the condensate pan 39 is directly fixed to the outer wall of the main tube 321, the number of parts of the condensate pan 39 is reduced, thus reducing the manufacturing cost of the evaporator 300.

[0076] It is understandable that a condensate pan 39 can be installed on the outer wall of the lower manifold 33 to collect the condensate formed on the outer surface of the flat pipe 34 between the lower manifold 33 and the main pipe 321.

[0077] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0078] Furthermore, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0079] In this application, expressions including ordinal numbers such as "first" and "second" may modify the elements. However, such elements are not limited by the foregoing expressions. For example, the foregoing expressions do not limit the order and / or importance of the elements. The foregoing expressions are only used to distinguish one element from other elements. For example, "first user equipment" and "second user equipment" refer to different user equipment, although both "first user equipment" and "second user equipment" are user equipment. Similarly, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0080] When a component is referred to as "connected" or "accessed" to other components, it should be understood that this component not only connects directly to or accesses other components, but also that another component may exist between this component and other components. On the other hand, when a component is referred to as "directly connected" or "directly accessed" to other components, it should be understood that no component exists between them.

[0081] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A common header evaporator characterized by, The evaporator comprises upper headers, middle headers and lower headers arranged at intervals, a plurality of flat tubes arranged at intervals between the upper headers and the middle headers and between the middle headers and the lower headers, the upper headers, the middle headers and the lower headers have the same extension direction, the extension direction of the flat tubes crosses the extension direction of the upper headers and the lower headers, each flat tube has a through channel in the extension direction of the flat tube, The middle headers comprise main tubes and partitions, the lower headers and the upper headers are fixedly connected with the main tubes through the flat tubes, the partitions are accommodated in the main tubes and extend along the extension direction of the main tubes, the partitions and the inner walls of the main tubes jointly form exhaust channels and liquid inlet channels, the lower headers, the exhaust channels, the liquid inlet channels and the upper headers are arranged along the extension direction of the flat tubes, the exhaust channels, the flat tubes between the lower headers and the main tubes and the lower headers are connected, the liquid inlet channels, the flat tubes between the main tubes and the upper headers and the upper headers are connected.

2. The evaporator of claim 1, wherein, The middle headers further comprise a plurality of heat insulation gaps arranged at intervals along the extension direction of the main tubes, the heat insulation gaps penetrate the tube walls of the main tubes and the partitions along a direction different from the extension direction of the partitions, the heat insulation gaps are arranged at intervals in the liquid inlet channels and the exhaust channels.

3. The evaporator of claim 1, wherein, The evaporator further comprises upper liquid inlet tubes, the upper liquid inlet tubes are arranged in the liquid inlet channels along the extension direction of the main tubes and are fixedly connected with the main tubes, a plurality of flow distribution holes are formed on the tube walls of the upper liquid inlet tubes along the extension direction of the upper liquid inlet tubes, the flow distribution holes penetrate the tube walls of the upper liquid inlet tubes, the flow distribution holes are connected with the liquid inlet channels and the cavities of the upper liquid inlet tubes.

4. The evaporator of claim 3, wherein, The evaporator further comprises at least one flow distribution plate, the at least one flow distribution plate is accommodated in the liquid inlet channels and connected with the inner walls of the liquid inlet channels, the at least one flow distribution plate is sleeved outside the upper liquid inlet tubes, the at least one flow distribution plate, the inner walls of the liquid inlet channels and the upper liquid inlet tubes jointly form at least two flow distribution cavities connected with each other, the at least two flow distribution cavities are arranged along the extension direction of the main tubes.

5. The evaporator of claim 1, wherein, The evaporator further comprises lower liquid inlet tubes, the lower liquid inlet tubes are arranged in the lower headers along the extension direction of the lower headers and are fixedly connected with the lower headers, a plurality of flow distribution holes are formed on the tube walls of the lower liquid inlet tubes along the extension direction of the lower liquid inlet tubes, the flow distribution holes penetrate the tube walls of the lower liquid inlet tubes, the flow distribution holes are connected with the cavities of the lower headers and the cavities of the lower liquid inlet tubes.

6. The evaporator of claim 5, wherein, The evaporator is provided with at least one flow distribution plate, which is accommodated in the lower header and connected with the inner wall of the lower header, and is sleeved on the outer wall of the lower liquid inlet pipe, and the at least one flow distribution plate, the inner wall of the lower header and the lower liquid inlet pipe form at least two flow distribution cavities in communication, which are arranged along the extension direction of the lower header.

7. The evaporator of claim 1, wherein, The upper header is provided with a plurality of first mounting through holes on the wall of the side of the upper header facing the main pipe along the extension direction of the upper header, and each of the plurality of flat tubes between the upper header and the main pipe is fixedly arranged in a corresponding first mounting through hole.

8. The evaporator of claim 1, wherein, The main pipe is provided with a plurality of second mounting through holes on the wall of the side of the main pipe facing the upper header along the extension direction of the main pipe, and each of the plurality of flat tubes between the upper header and the main pipe is fixedly arranged in a corresponding second mounting through hole.

9. The evaporator of claim 1, wherein, The main pipe is provided with a plurality of third mounting through holes on the wall of the side of the main pipe facing the lower header along the extension direction of the main pipe, and each of the plurality of flat tubes between the lower header and the main pipe is fixedly arranged in a corresponding third mounting through hole.

10. The evaporator of claim 1, wherein, The lower header is provided with a plurality of fourth mounting through holes on the wall of the side of the lower header facing the main pipe along the extension direction of the lower header, and each of the plurality of flat tubes between the lower header and the main pipe is fixedly arranged in a corresponding fourth mounting through hole.

11. The evaporator of claim 1, wherein, The evaporator further comprises a condensate pan, which is protruded from the outer wall of the main pipe and extends along the extension direction of the main pipe, and is provided with a drain opening.

12. The evaporator of claim 11, wherein, The condensate pan comprises a first end and a second end along the extension direction of the middle header, and the drain opening is arranged at the second end. In the extension direction of the flat tube, the shortest distance from the first end to the lower header is greater than the shortest distance from the second end to the lower header.

13. A temperature control device, characterized by The system comprises a throttling device, an evaporator according to any one of claims 1-12, a compressor and a condenser connected with the throttling device.

14. A heat exchange system, characterized by, The system comprises a working device and a temperature control device according to claim 13, which is used to adjust the temperature of the working device.

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