Liquid distribution device for heat exchanger and heat exchanger

Abstract

This invention relates to the field of heat exchange equipment technology, specifically providing a liquid distribution device and a heat exchanger for a heat exchanger, aiming to solve the problem of uneven refrigerant distribution in the secondary liquid distribution chamber of existing multi-pass heat exchangers, which affects the heat exchange efficiency of the heat exchanger. To this end, the heat exchanger of this invention includes multiple first heat exchange tubes and multiple second heat exchange tubes. The liquid distribution device includes a liquid distribution component and a flow guiding component. The liquid distribution component is provided with a liquid distribution chamber, an inlet hole, and an outlet hole. The number of inlet holes and outlet holes are multiple and they are respectively connected to the outlet end of the corresponding first heat exchange tube and the inlet end of the corresponding second heat exchange tube. The flow guiding component is located inside the liquid distribution chamber and has multiple flow guiding channels. The first and second ports of the multiple flow guiding channels are respectively provided for the multiple inlet holes and the multiple outlet holes. This allows the refrigerant entering the liquid distribution chamber from the first heat exchange tubes to be evenly distributed into the multiple second heat exchange tubes, thereby avoiding affecting the heat exchange efficiency of the heat exchanger.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, specifically providing a liquid separation device and a heat exchanger for use in heat exchangers. Background Technology

[0002] To achieve multi-pass flow design, existing heat exchangers often use U-shaped elbows to weld between two sets of U-shaped heat exchange tubes.

[0003] Taking dry evaporators as an example, for dry evaporators with small cooling capacity, the heat exchange tubes of the heat exchanger are densely arranged, and the above design is achieved by welding. The welding is difficult and there is a large rate of missed welds, which leads to refrigerant leakage.

[0004] To address the problems associated with welding methods, some heat exchangers on the market employ a secondary liquid distribution chamber design to achieve multi-pass flow design. However, a simple secondary liquid distribution chamber can lead to uneven refrigerant distribution, affecting the heat exchanger's heat exchange efficiency.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the refrigerant distribution in the secondary liquid distribution chamber of existing multi-pass heat exchangers is uneven, which affects the heat exchange efficiency of the heat exchanger.

[0007] In a first aspect, the present invention provides a liquid separation device for a heat exchanger, the heat exchanger including a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, the liquid separation device including a liquid separation component and a flow guiding component, the liquid separation component being provided with a liquid separation chamber and inlet holes and outlet holes communicating with the liquid separation chamber, the number of inlet holes being plurality of and respectively communicating with the outlet end of the corresponding first heat exchange tube, the number of outlet holes being plurality of and respectively communicating with the inlet end of the corresponding second heat exchange tube, the flow guiding component being located inside the liquid separation chamber and having a gap between it and the inner wall of the liquid separation chamber, the flow guiding component having a plurality of independent flow guiding channels, the first port and the second port of the plurality of flow guiding channels being respectively provided corresponding to the plurality of inlet holes and the plurality of outlet holes.

[0008] In the preferred embodiment of the above-mentioned liquid separation device, the liquid separation device further includes a plurality of first connecting pipes, one end of each of the plurality of first connecting pipes being connected to the first port of the corresponding drainage channel, and the other end of each of the plurality of first connecting pipes passing through the corresponding liquid inlet and being inserted into the corresponding first heat exchange tube. The outer diameter of the first connecting pipe is smaller than the inner diameter of the first heat exchange tube and the inner diameter of the liquid inlet.

[0009] In the preferred embodiment of the above-mentioned liquid separation device, the liquid separation device further includes multiple speed-reducing pipes, which are respectively arranged between the corresponding first connecting pipe and the flow channel to reduce the flow rate of refrigerant entering the flow channel.

[0010] In the preferred embodiment of the above-mentioned liquid separation device, the inner diameter of the deceleration pipe gradually increases along the direction close to the drainage channel.

[0011] In the preferred embodiment of the above-mentioned liquid separation device, the liquid separation device further includes a plurality of second connecting pipes, one end of each of the plurality of second connecting pipes being connected to the second port of the corresponding drainage channel, and the other end of each of the plurality of second connecting pipes passing through the corresponding liquid outlet and being inserted into the corresponding second heat exchange tube. The outer diameter of the second connecting pipe is smaller than the inner diameter of the second heat exchange tube and the inner diameter of the liquid outlet.

[0012] In the preferred embodiment of the above-mentioned liquid separation device, the liquid separation device further includes multiple speed-increasing pipes, which are respectively arranged between the corresponding second connecting pipe and the flow channel to increase the flow rate of refrigerant entering the second connecting pipe.

[0013] In the preferred embodiment of the above-mentioned liquid separation device, the inner diameter of the speed-increasing pipe gradually decreases along the direction close to the second connecting pipe.

[0014] In the preferred embodiment of the above-mentioned liquid separation device, the drainage channel has at least two second ports, and the liquid separation component is provided with a liquid outlet hole at a position corresponding to each of the at least two second ports.

[0015] In the preferred embodiment of the above-mentioned liquid separation device, the drainage channel is formed during the injection molding process of the drainage component.

[0016] In a second aspect, the present invention provides a heat exchanger comprising the liquid separation device described above.

[0017] With the above technical solution, the heat exchanger of the present invention includes a plurality of first heat exchange tubes and a plurality of second heat exchange tubes. The liquid distribution device of the present invention includes a liquid distribution component and a flow guiding component. The liquid distribution component is provided with a liquid distribution chamber and inlet holes and outlet holes communicating with the liquid distribution chamber. There are a plurality of inlet holes, each communicating with the outlet end of a corresponding first heat exchange tube. There are a plurality of outlet holes, each communicating with the inlet end of a corresponding second heat exchange tube. The flow guiding component is located inside the liquid distribution chamber and has a gap between it and the inner wall of the liquid distribution chamber. The flow guiding component has a plurality of independent flow guiding channels. The first port and the second port of the plurality of flow guiding channels are respectively provided with a plurality of inlet holes and a plurality of outlet holes. With this arrangement, when the refrigerant in the plurality of first heat exchange tubes enters the liquid distribution chamber, the plurality of flow guiding channels in the flow guiding component guide the refrigerant to the inlet end of the corresponding second heat exchange tube, thereby making the refrigerant discharged from the plurality of first heat exchange tubes evenly distributed into the plurality of second heat exchange tubes, preventing the heat exchange efficiency of the heat exchanger from being affected by uneven distribution of refrigerant in the liquid distribution chamber.

[0018] Furthermore, the liquid distribution device of the present invention also includes a plurality of first connecting pipes, one end of which is connected to the first port of a corresponding drainage channel, and the other end of which passes through a corresponding liquid inlet and is inserted into a corresponding first heat exchange tube. The outer diameter of the first connecting pipe is smaller than the inner diameter of the first heat exchange tube and the inner diameter of the liquid inlet. By setting a plurality of first connecting pipes and inserting one end of the first connecting pipe into the corresponding first heat exchange tube, more refrigerant in the first heat exchange tube enters the drainage channel, and more refrigerant is discharged from the second port of the drainage channel and guided to the inlet end of the second heat exchange tube, thereby allowing more refrigerant to enter the second heat exchange tube. This improves the distribution efficiency and effect of distributing the refrigerant discharged from the plurality of first heat exchange tubes into the plurality of second heat exchange tubes, further improving the heat exchange effect of the heat exchanger.

[0019] Furthermore, the liquid separation device of the present invention also includes multiple deceleration pipes, which are respectively disposed between the corresponding first connecting pipe and the drainage channel to reduce the flow rate of the refrigerant entering the drainage channel. This arrangement facilitates a reduction in the flow rate of the refrigerant from the first connecting pipe into the drainage channel under the action of the deceleration pipes, thereby ensuring uniform mixing of the gaseous and liquid refrigerants. This improves the uniformity of the refrigerant entering the second heat exchange tube from the drainage channel, further enhancing the heat exchange effect of the heat exchanger.

[0020] Furthermore, the inner diameter of the deceleration pipe gradually increases along the direction close to the flow channel. This design ensures that as the refrigerant enters the flow channel from the first connecting pipe, the pipe diameter through which the refrigerant flows gradually increases, reducing the refrigerant velocity and facilitating the mixing of the gaseous and liquid refrigerants, thereby improving the uniformity of refrigerant mixing.

[0021] Furthermore, the liquid distribution device of the present invention also includes a plurality of second connecting pipes. One end of each of the plurality of second connecting pipes is connected to the second port of a corresponding drainage channel, and the other end of each of the plurality of second connecting pipes passes through a corresponding liquid outlet and is inserted into a corresponding second heat exchange tube. The outer diameter of the second connecting pipe is smaller than the inner diameter of the second heat exchange tube and the inner diameter of the liquid outlet. With this arrangement, by providing multiple second connecting pipes, more refrigerant discharged from the second port of the drainage channel can enter the corresponding second connecting pipe, thereby improving the distribution efficiency and effect of distributing the refrigerant discharged from the multiple first heat exchange tubes into the multiple second heat exchange tubes, and further improving the heat exchange effect of the heat exchanger.

[0022] Furthermore, the liquid separation device of the present invention also includes multiple speed-increasing pipes, which are respectively disposed between the corresponding second connecting pipe and the drainage channel to increase the flow rate of the refrigerant entering the second connecting pipe. Through this arrangement, the speed-increasing pipes increase the flow rate of the refrigerant from the drainage channel into the second connecting pipe, thereby increasing the flow rate of the refrigerant in the second heat exchange tube, and thus improving the heat exchange efficiency of the heat exchanger.

[0023] Furthermore, the inner diameter of the speed-increasing pipe gradually decreases along the direction closest to the second connecting pipe. This design ensures that as the refrigerant enters the second connecting pipe from the guide channel, the inner diameter of the pipe through which the refrigerant flows gradually decreases, thereby increasing the refrigerant flow rate.

[0024] Furthermore, the drainage channel has at least two second ports, and the liquid distribution component has a liquid outlet hole at each position corresponding to the at least two second ports. This arrangement facilitates the design requirement of two second heat exchange tubes corresponding to each first heat exchange tube, reduces the resistance encountered by the refrigerant when flowing through the second heat exchange tubes, increases the flow area of ​​the refrigerant within the second heat exchange tubes, thereby increasing the heat transfer area of ​​the heat exchanger and ultimately improving its heat exchange efficiency.

[0025] Furthermore, the heat exchanger provided by the present invention, based on the above technical solution, includes the liquid separation device for the heat exchanger, and thus possesses the technical effects of the liquid separation device. Compared with the heat exchanger before the improvement, the heat exchanger of the present invention has a higher heat exchange efficiency. Attached Figure Description

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0027] Figure 1 This is a schematic diagram of the heat exchanger of the present invention;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of a first embodiment of the drainage component of the present invention;

[0029] Figure 3 This is a front view structural schematic diagram of a first embodiment of the drainage component of the present invention;

[0030] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0031] Figure 5 This is a schematic diagram of the structure of a second embodiment of the drainage component of the present invention;

[0032] Figure 6 This is a structural schematic diagram of the U-shaped bend component of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of a first embodiment of the heat exchanger of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of a second embodiment of the heat exchanger of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of a third embodiment of the heat exchanger of the present invention.

[0036] List of reference numerals in the attached diagram:

[0037] 1. First heat exchange tube; 2. Second heat exchange tube; 31. Liquid distribution component; 311. Liquid distribution chamber; 312. Liquid inlet; 313. Liquid outlet; 32. Flow guiding component; 321. Flow guiding channel; 3211. First port; 3212. Second port; 33. First connecting pipe; 331. Deceleration pipe; 34. Second connecting pipe; 341. Speed-increasing pipe; 35. U-shaped bend; 41. Liquid inlet pipe; 42. Liquid inlet chamber; 51. Liquid outlet pipe; 52. Liquid outlet chamber; 6. Third heat exchange tube. Detailed Implementation

[0038] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0039] It should be noted that in the description of this invention, terms such as "inner" and "outer," which indicate direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Please see Figure 1 , Figure 1 This is a schematic diagram of the heat exchanger of the present invention.

[0042] like Figure 1 As shown, the heat exchanger of the present invention includes a plurality of first heat exchange tubes 1 and a plurality of second heat exchange tubes 2. The heat exchanger also includes a liquid inlet component and a liquid outlet component. The liquid inlet component includes a liquid inlet pipe 41 and a liquid inlet chamber 42 communicating with the liquid inlet pipe 41. The liquid outlet component includes a liquid outlet pipe 51 and a liquid outlet chamber 52 communicating with the liquid outlet pipe 51. The inlet ends of the plurality of first heat exchange tubes 1 are connected to the liquid inlet chamber 42, and the outlet ends of the plurality of second heat exchange tubes 2 are connected to the liquid outlet chamber 52.

[0043] It should be noted that in practical applications, both the first heat exchange tube 1 and the second heat exchange tube 2 can be configured as U-shaped heat exchange tubes, that is, the U-shaped first heat exchange tube 1 and the U-shaped second heat exchange tube 2 form a four-pass heat exchanger (e.g. Figure 1 and Figure 7 (As shown), or, one of the first heat exchange tube 1 and the second heat exchange tube 2 can be set as a U-shaped tube, and the other of the first heat exchange tube 1 and the second heat exchange tube 2 can be set as a straight tube, that is, the first heat exchange tube 1 and the second heat exchange tube 2 form a three-pass heat exchanger (as shown). Figure 9 As shown in the figure, etc., such adjustments and changes to the specific configuration types of the first heat exchange tube 1 and the second heat exchange tube 2 do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0044] Preferably, such as Figure 1 As shown, both the first heat exchange tube 1 and the second heat exchange tube 2 are configured as U-shaped heat exchange tubes.

[0045] The following will use a four-pass heat exchanger consisting of a U-shaped first heat exchange tube 1 and a U-shaped second heat exchange tube 2 as an example to introduce a specific embodiment of the liquid separation device of the present invention.

[0046] Continue reading Figure 1 And then refer to Figures 2 to 7 , Figure 2 This is a three-dimensional structural schematic diagram of a first embodiment of the drainage component of the present invention; Figure 3 This is a front view structural schematic diagram of a first embodiment of the drainage component of the present invention; Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along line AA; Figure 5This is a schematic diagram of the structure of a second embodiment of the drainage component of the present invention; Figure 6 This is a structural schematic diagram of the U-shaped bend component of the present invention; Figure 7 This is a schematic diagram of the structure of a first embodiment of the heat exchanger of the present invention.

[0047] like Figures 1 to 4 As shown, the liquid separation device of the present invention includes a liquid separation component 31 and a flow guiding component 32. The liquid separation component 31 is provided with a liquid separation chamber 311 and an inlet hole 312 and an outlet hole 313 communicating with the liquid separation chamber 311. There are multiple inlet holes 312, each of which is connected to the outlet end of the corresponding first heat exchange tube 1. There are multiple outlet holes 313, each of which is connected to the inlet end of the corresponding second heat exchange tube 2. The flow guiding component 32 is located inside the liquid separation chamber 311 and has a gap between it and the inner wall of the liquid separation chamber 311. The flow guiding component 32 has multiple independent flow guiding channels 321. The first port 3211 and the second port 3212 of the multiple flow guiding channels 321 are respectively provided corresponding to the multiple inlet holes 312 and the multiple outlet holes 313.

[0048] With this configuration, on the one hand, when the refrigerant in the multiple first heat exchange tubes 1 enters the liquid distribution chamber 311, the multiple drainage channels 321 in the drainage component 32 guide the refrigerant to the inlet end of the corresponding second heat exchange tube 2, thereby ensuring that the refrigerant discharged from the multiple first heat exchange tubes 1 is evenly distributed into the multiple second heat exchange tubes 2, preventing the heat exchange efficiency of the heat exchanger from being affected by uneven distribution of refrigerant in the liquid distribution chamber 311; on the other hand, setting the liquid distribution device into liquid distribution component 31 and drainage component 32 can reduce the manufacturing difficulty of the heat exchanger and avoid welding the drainage channels 321 to the multiple first heat exchange tubes 1 and multiple second heat exchange tubes 2, thereby avoiding refrigerant leakage due to incomplete welding.

[0049] It should be noted that, in practical applications, those skilled in the art can weld the first heat exchange tube 1 and the second heat exchange tube 2 to the liquid distribution component 31, thereby enabling the liquid inlet hole 312 on the liquid distribution component 31 to communicate with the outlet end of the first heat exchange tube 1, and the liquid outlet hole 313 on the liquid distribution component 31 to communicate with the inlet end of the corresponding second heat exchange tube 2. Alternatively, the first heat exchange tube 1 and the second heat exchange tube 2 can be expanded to connect with the liquid distribution component 31, thereby enabling the liquid inlet hole 312 on the liquid distribution component 31 to communicate with the outlet end of the first heat exchange tube 1, and the liquid outlet hole 313 on the liquid distribution component 31 to communicate with the inlet end of the corresponding second heat exchange tube 2, etc. Such adjustments and changes to the specific connection method between the first heat exchange tube 1 and the second heat exchange tube 2 and the liquid distribution component 31 do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0050] Preferably, the first heat exchange tube 1 and the second heat exchange tube 2 are configured to be expanded and connected to the liquid distribution component 31, so that the liquid inlet hole 312 on the liquid distribution component 31 is connected to the outlet end of the first heat exchange tube 1, and the liquid outlet hole 313 on the liquid distribution component 31 is connected to the inlet end of the corresponding second heat exchange tube 2.

[0051] By setting the first heat exchange tube 1 and the second heat exchange tube 2 to be expanded and connected to the liquid distribution component 31, compared with welding, the weld points that have been completed are avoided from melting during welding, thereby greatly reducing the weld leakage rate. Therefore, it is possible to avoid refrigerant leakage caused by weld leakage.

[0052] It should be noted that, in practical applications, those skilled in the art can arrange the multiple first heat exchange tubes 1 in a horizontally arranged form, with the multiple first heat exchange tubes 1 spaced apart along the horizontal direction (e.g., Figure 1 (As shown), or, the multiple first heat exchange tubes 1 can be arranged in an inner-outer arrangement, with the multiple first heat exchange tubes 1 spaced apart from the inside to the outside. Alternatively, the multiple first heat exchange tubes 1 can be arranged both horizontally and in an inner-outer arrangement, that is, two or more first heat exchange tubes 1 spaced apart from the inside to the outside form a heat exchange tube group, and multiple heat exchange tube groups are spaced apart along the horizontal direction, etc. Such adjustments and changes to the arrangement of the multiple first heat exchange tubes 1 do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0053] Preferably, the three first heat exchange tubes 1 are arranged in a triangle from the inside to the outside to form a heat exchange tube group, and multiple heat exchange tube groups are distributed at intervals along the horizontal direction (not shown in the figure).

[0054] It should be noted that the distribution of the multiple second heat exchange tubes 2 is the same as that of the multiple first heat exchange tubes 1, and will not be repeated here.

[0055] It should also be noted that, in practical applications, those skilled in the art can set the drainage channel 321 in a U-shape, or in a V-shape, or in other possible forms, etc. Such adjustments and changes to the specific shape of the drainage channel 321 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0056] Preferably, such as Figure 4 and Figure 5 As shown, the drainage channel 321 is set in a U-shape, with one end of the U-shaped drainage channel 321 being the first port 3211 and the other end being the second port 3212.

[0057] This configuration reduces the resistance encountered by the refrigerant as it flows from the first port 3211 of the flow channel 321 to the second port 3212, thereby reducing the decrease in the flow velocity of the refrigerant when it flows out of the second port 3212 and preventing any impact on the heat exchanger's heat exchange efficiency.

[0058] It should be noted that in practical applications, the distribution of multiple independent flow channels 321 corresponds to the distribution of multiple first heat exchange tubes 1 and multiple second heat exchange tubes 2. For example, when multiple first heat exchange tubes 1 are arranged to be spaced apart in the horizontal direction, the multiple flow channels 321 are also arranged to be spaced apart in the horizontal direction, and the distribution distance between multiple flow channels 321 corresponds to the distribution distance between multiple first heat exchange tubes 1. Or, when multiple first heat exchange tubes 1 are arranged to be spaced apart from the inside to the outside, the multiple flow channels 321 are also arranged to be spaced apart from the inside to the outside, and the distance between two adjacent flow channels 321 corresponds to the distance between two adjacent first heat exchange tubes 1. Or, when multiple first heat exchange tubes 1 are arranged to be spaced apart both in the horizontal direction and from the inside to the outside, the multiple flow channels 321 are also arranged to be spaced apart both in the horizontal direction and from the inside to the outside, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0059] Preferably, such as Figures 2 to 5 As shown, the three first heat exchange tubes 1 are arranged in a triangle from the inside to the outside to form a heat exchange tube group, and multiple heat exchange tube groups are distributed at intervals along the horizontal direction. Correspondingly, the three drainage channels 321 are arranged at intervals from the inside to the outside to form a drainage channel group, and multiple drainage channel groups are distributed at intervals along the horizontal direction.

[0060] It should be noted that, in practical applications, those skilled in the art can set the second port 3212 to one, or two, or even multiple, etc. Such adjustments and changes to the specific number of the second port 3212 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0061] Preferably, such as Figure 5 and Figure 7 As shown, the drainage channel 321 has two second ports 3212. The liquid distribution component 31 is provided with a liquid outlet 313 at the position corresponding to the two second ports 3212. Correspondingly, a second heat exchange tube 2 is provided at the liquid outlet 313 corresponding to the two second ports 3212. That is, each first heat exchange tube 1 corresponds to two second heat exchange tubes 2.

[0062] This configuration facilitates the design requirement of each first heat exchange tube 1 corresponding to two second heat exchange tubes 2, reduces the resistance encountered by the refrigerant when flowing in the second heat exchange tubes 2, increases the flow area of ​​the refrigerant in the second heat exchange tubes 2, thereby increasing the heat transfer area of ​​the heat exchanger and improving the heat exchange efficiency of the heat exchanger.

[0063] It should be noted that, in practical applications, those skilled in the art can place the drainage component 32 directly into the liquid distribution chamber 311, and make the first port 3211 of the drainage channel 321 correspond to the multiple liquid inlet holes 312 respectively, and make the second port 3212 of the drainage channel 321 correspond to the multiple liquid outlet holes 313 respectively. Alternatively, multiple connecting pipes can be provided at the end of the drainage channel 321, and the connecting pipes can be inserted into the corresponding multiple first heat exchange tubes 1 or multiple second heat exchange tubes 2, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0064] It should also be noted that, in practical applications, those skilled in the art may set the connecting pipe only at the first port 3211 of the drainage channel 321, or only at the second port 3212 of the drainage channel 321, or simultaneously at both the first port 3211 and the second port 3212 of the drainage channel 321, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0065] Preferably, such as Figures 2 to 5 As shown, the liquid separation device of the present invention further includes a plurality of first connecting pipes 33. One end of the plurality of first connecting pipes 33 is connected to the first port 3211 of the corresponding drainage channel 321, and the other end of the plurality of first connecting pipes 33 passes through the corresponding liquid inlet hole 312 and is inserted into the corresponding first heat exchange tube 1. The outer diameter of the end of the first connecting pipe 33 away from the first port 3211 is smaller than the inner diameter of the first heat exchange tube 1 and the inner diameter of the liquid inlet hole 312.

[0066] By setting multiple first connecting pipes 33 and inserting one end of each first connecting pipe 33 into the corresponding first heat exchange tube 1, more refrigerant in the first heat exchange tube 1 enters the guide channel 321, and more refrigerant is discharged from the second port 3212 of the guide channel 321 and guided to the inlet end of the second heat exchange tube 2, thereby allowing more refrigerant to enter the second heat exchange tube 2. This improves the distribution efficiency and effect of distributing the refrigerant discharged from the multiple first heat exchange tubes 1 into the multiple second heat exchange tubes 2, and further improves the heat exchange effect of the heat exchanger.

[0067] It should be noted that, in practical applications, those skilled in the art can configure the first connecting pipe 33 to be welded to the drainage component 32, or the first connecting pipe 33 can be configured to be integrally formed with the drainage component 32, etc. Such adjustments and changes to the specific connection method between the first connecting pipe 33 and the drainage component 32 do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0068] Preferably, the first connecting pipe 33 is integrally formed with the drainage component 32, and the plurality of first connecting pipes 33 are respectively connected to the drainage channel 321.

[0069] Preferably, such as Figures 2 to 5 As shown, the liquid separation device of the present invention also includes a plurality of deceleration pipes 331, which are respectively disposed between the corresponding first connecting pipe 33 and the flow channel 321 to reduce the flow rate of refrigerant entering the flow channel 321.

[0070] This configuration facilitates the reduction of refrigerant flow velocity from the first connecting pipe 33 into the diversion channel 321 under the action of the deceleration pipe 331, thereby making the gas phase refrigerant and liquid phase refrigerant mix evenly, thus improving the uniformity of refrigerant entering the second heat exchange tube 2 from the diversion channel 321, and further improving the heat exchange effect of the heat exchanger.

[0071] Preferably, the inner diameter of the deceleration pipe 331 gradually increases along the direction close to the flow channel 321.

[0072] With this configuration, when the refrigerant enters the flow channel 321 from the first connecting pipe 33, the pipe diameter through which the refrigerant flows gradually increases, and the flow rate of the refrigerant decreases, which facilitates the mixing of gaseous refrigerant and liquid refrigerant, thereby improving the mixing uniformity of the refrigerant.

[0073] It should be noted that, in practical applications, those skilled in the art may configure only one end of the deceleration pipe 331 to be integrally formed with the first connecting pipe 33, or only the other end of the deceleration pipe 331 to be integrally formed with the drainage channel 321, or both ends of the deceleration pipe 331 may be integrally formed with the first connecting pipe 33 and the drainage channel 321 respectively, etc. Such adjustments and changes to the specific connection method of the deceleration pipe 331 with the first connecting pipe 33 and the drainage channel 321 do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0074] Preferably, the two ends of the deceleration pipe 331 are integrally formed with the first connecting pipe 33 and the drainage channel 321, respectively.

[0075] It should be noted that in practical applications, the flow rate of refrigerant from the first connecting pipe 33 into the flow channel 321 is not limited to reducing the flow rate by setting a speed-reducing pipe 331 between the first connecting pipe 33 and the flow channel 321. For example, a speed-reducing structure can also be set in the first connecting pipe 33. The speed-reducing structure includes a first flow channel and a second flow channel (not shown in the figure) connected together. The first flow channel is connected to the first connecting pipe 33, and the second flow channel is connected to the first port 3211 of the flow channel 321. The inner diameter of the first flow channel is smaller than the inner diameter of the second flow channel, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0076] Preferably, such as Figures 2 to 5 As shown, the liquid separation device of the present invention further includes a plurality of second connecting pipes 34. One end of the plurality of second connecting pipes 34 is connected to the second port 3212 of the corresponding drainage channel 321, and the other end of the plurality of second connecting pipes 34 passes through the corresponding liquid outlet 313 and is inserted into the corresponding second heat exchange tube 2. The outer diameter of the end of the second connecting pipe 34 away from the first port 3211 is smaller than the inner diameter of the second heat exchange tube 2 and the inner diameter of the liquid outlet 313.

[0077] By setting multiple second connecting pipes 34, more refrigerant discharged from the second port 3212 of the diversion channel 321 can enter the corresponding second connecting pipe 34, thereby improving the distribution efficiency and effect of distributing the refrigerant discharged from multiple first heat exchange tubes 1 to multiple second heat exchange tubes 2, and further improving the heat exchange effect of the heat exchanger.

[0078] It should be noted that, in practical applications, those skilled in the art can configure the second connecting pipe 34 to be welded to the drainage component 32, or the second connecting pipe 34 can be configured to be integrally formed with the drainage component 32, etc. Such adjustments and changes to the specific connection method between the second connecting pipe 34 and the drainage component 32 do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0079] Preferably, the second connecting pipe 34 is integrally formed with the drainage component 32, and the plurality of second connecting pipes 34 are respectively connected to the drainage channel 321.

[0080] Preferably, such as Figures 2 to 5 As shown, the liquid separation device of the present invention also includes a plurality of speed-increasing pipes 341, which are respectively disposed between the corresponding second connecting pipe 34 and the flow channel 321 to increase the flow rate of refrigerant entering the second connecting pipe 34.

[0081] With this configuration, the flow rate of the refrigerant from the guide channel 321 into the second connecting pipe 34 is increased by the speed-increasing pipe 341, thereby increasing the flow rate of the refrigerant in the second heat exchange tube 2 and thus improving the heat exchange efficiency of the heat exchanger.

[0082] It should be noted that, in practical applications, those skilled in the art can configure the speed-increasing pipe 341 so that one end is welded to the second connecting pipe 34 and the other end is integrally formed with the drainage channel 321. Alternatively, the speed-increasing pipe 341 can be configured so that one end is integrally formed with the second connecting pipe 34 and the other end is welded to the drainage channel 321. Or, the speed-increasing pipe 341 can be configured so that both ends are integrally formed with the second connecting pipe 34 and the drainage channel 321, respectively. Such adjustments and changes to the specific connection method between the speed-increasing pipe 341, the second connecting pipe 34, and the drainage channel 321 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0083] Preferably, the speed-increasing pipe 341 is configured such that its two ends are integrally formed with the second connecting pipe 34 and the diversion channel 321, respectively.

[0084] It should be noted that in practical applications, the flow rate of refrigerant from the drainage channel 321 into the second connecting pipe 34 is not limited to increasing the flow rate by setting an acceleration pipe 341 between the second connecting pipe 34 and the drainage channel 321. For example, an acceleration structure can also be set in the second connecting pipe 34. The acceleration structure includes a connected third flow channel and a fourth flow channel (not shown in the figure). The third flow channel is connected to the drainage channel 321, and the fourth flow channel is connected to the second connecting pipe 34. The inner diameter of the third flow channel is larger than the inner diameter of the fourth flow channel, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0085] It should also be noted that, in practical applications, those skilled in the art can configure the drainage channel 321 to be formed within the drainage component 32, or the drainage channel 321 can be configured to be formed during the injection molding process, etc. Such adjustments and changes to the specific formation method of the drainage channel 321 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0086] Preferably, the drainage component 32 is formed by injection molding, and the drainage channel 321 is formed by the drainage component 32 during the injection molding process.

[0087] This configuration facilitates the formation of the flow channel 321, thereby reducing the processing difficulty of the flow component 32 and improving the production efficiency of the flow component 32. At the same time, it facilitates the formation of the flow component 32 with two or more second ports 3212 in the flow channel 321, thereby meeting the design requirement of two second heat exchange tubes 2 for each first heat exchange tube 1.

[0088] For example, such as Figure 5 and Figure 6 As shown, the flow channel inside the U-shaped bend component is adapted to the flow channel 321. During injection molding, multiple U-shaped bend components are placed in the injection mold of the flow channel 32 in a set order. After injection molding, the flow channel 32 is formed. The U-shaped bend component is embedded in the flow channel 32, and the flow channel inside the U-shaped bend component is the flow channel 321.

[0089] By using this configuration, namely forming the flow guide component 32 through injection molding, on the one hand, the difficulty of forming the flow guide channel 321 can be reduced, thereby improving the processing efficiency of the flow guide component 32 and thus improving the processing efficiency of the heat exchanger; on the other hand, compared with the method of opening the flow guide channel 321 in the flow guide component 32, the inner wall of the flow guide channel 321 formed by injection molding is smoother, thereby reducing the impact of impurities retained in the flow guide channel 321 on the heat exchanger.

[0090] It should be noted that, in practical applications, those skilled in the art can configure the U-shaped bend component to have only a U-shaped bend 35 adapted to the drainage channel 321, so that only the drainage channel 321 is formed during injection molding. Alternatively, the U-shaped bend component can be configured to have the U-shaped bend 35 welded to or integrally formed with the first connecting pipe 33 or the second connecting pipe 34, so that the drainage channel 321 and the first connecting pipe 33 or the second connecting pipe 34 communicating with the drainage channel 321 are formed simultaneously during injection molding of the drainage component 32. Such flexible adjustments or changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0091] It should also be noted that, in practical applications, those skilled in the art can configure the U-shaped bend 35 to be welded to or integrally formed with the deceleration pipe 331, and then configure the deceleration pipe 331 to be welded to or integrally formed with the first connecting pipe 33. When the flow-guiding component 32 is injection molded, the flow-guiding channel 321, the deceleration pipe 331, and the first connecting pipe 33 are formed simultaneously. Alternatively, the U-shaped bend 35 can be configured to be welded to or integrally formed with the acceleration pipe 341, and then configure the acceleration pipe 341 to be welded to or integrally formed with the second connecting pipe 34. When the flow-guiding component 32 is injection molded, the flow-guiding channel 321, the acceleration pipe 341, and the second connecting pipe 34 are formed simultaneously, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0092] Preferably, such as Figure 6 As shown, the U-shaped bend component is configured such that one end of the U-shaped bend 35 is integrally formed with the speed-increasing pipe 341 and the second connecting pipe 34, and then the U-shaped bend component is placed in the injection mold for injection molding of the flow-guiding component 32.

[0093] It should be noted that, in practical applications, the liquid separation device of the present invention is not limited to the four-pass heat exchanger described above. For example, it is also applicable to three-pass heat exchangers and five-pass heat exchangers with odd number of passes, or even-pass heat exchangers with six-pass and eight-pass heat exchangers, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention.

[0094] It should also be noted that, in the above embodiments, it is not limited to setting one set of the first heat exchange tube 1 and one set of the second heat exchange tube 2 in the vertical direction. For example, the first heat exchange tube 1 can be set as one set, and the second heat exchange tube 2 can be set as two sets in the vertical direction, or the first heat exchange tube 1 can be set as one set, and the second heat exchange tube 2 can be set as multiple sets in the vertical direction, etc. Such adjustments and changes to the specific number of the second heat exchange tube 2 do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0095] For example, when both the first heat exchange tube 1 and the second heat exchange tube 2 are U-shaped heat exchange tubes, the first heat exchange tube 1 can be set as one group, and the second heat exchange tube 2 can be set as N groups along the vertical direction. That is, the first heat exchange tube 1 and N groups of second heat exchange tubes 2 form a heat exchanger with (N+1)*2 tube passes, where N is an integer not less than 1, etc. Such flexible adjustment and change does not deviate from the principle and scope of the present invention.

[0096] The following is combined Figure 8 This section introduces an embodiment of a six-tube heat exchanger. Figure 8 This is a schematic diagram of the structure of a second embodiment of the heat exchanger of the present invention.

[0097] Preferably, such as Figure 8 As shown, the heat exchanger of the present invention includes a plurality of first heat exchange tubes 1, a plurality of third heat exchange tubes 6, and a plurality of second heat exchange tubes 2, wherein the first heat exchange tubes 1, the third heat exchange tubes 6, and the second heat exchange tubes 2 are all U-shaped tubes. The heat exchanger of the present invention also includes a liquid inlet component and a liquid outlet component, wherein the liquid inlet component and the liquid outlet component are located at the same end of the heat exchanger. The liquid inlet component includes a liquid inlet pipe 41 and a liquid inlet chamber 42 communicating with the liquid inlet pipe 41. The liquid outlet component includes a liquid outlet pipe 51 and a liquid outlet chamber 52 communicating with the liquid outlet pipe 51. The inlet end of the plurality of first heat exchange tubes 1 is connected to the liquid inlet chamber 42, and the outlet end of the plurality of second heat exchange tubes 2 is connected to the liquid outlet chamber 52.

[0098] The liquid separation device of the present invention includes a liquid separation component 31 and a flow guiding component 32, wherein the liquid separation component 31 and the flow guiding component 32 are arranged in two groups and distributed side by side in the vertical direction. Each liquid separation component 31 is provided with a liquid separation chamber 311 and an inlet hole 312 and an outlet hole 313 communicating with the liquid separation chamber 311. The two flow guiding components 32 are respectively located in the two liquid separation chambers 311 and have a gap between them and the inner wall of the liquid separation chambers 311. Each liquid separation component 31 has multiple inlet holes 312, which are respectively connected to the outlet ends of the corresponding first heat exchange tube 1 and third heat exchange tube 6. Each liquid separation component 31 has multiple outlet holes 313, which are respectively connected to the inlet ends of the corresponding third heat exchange tube 6 and second heat exchange tube 2. The flow guiding component 32 has multiple independent flow guiding channels 321. The first port 3211 and the second port 3212 of the multiple flow guiding channels 321 are respectively provided corresponding to the multiple inlet holes 312 and the multiple outlet holes 313.

[0099] By setting up multiple sets of U-shaped heat exchange tubes distributed vertically and by setting up a liquid-liquid component 31 and a flow-guiding component 32 between each of two adjacent sets of U-shaped heat exchange tubes, the design requirements of a six-tube heat exchanger can be met.

[0100] In this embodiment, the specific structures of the liquid separation component 31 and the drainage component 32 are the same as those in Embodiment 1, and will not be described again here.

[0101] For example, when the first heat exchange tube 1 is set as a U-shaped heat exchange tube and the second heat exchange tube 2 is set as a straight tube, the first heat exchange tube 1 can be set into N groups in the vertical direction, and the second heat exchange tube 2 can be set into one group. The N groups of first heat exchange tube 1 and one group of second heat exchange tube 2 form a heat exchanger with (2N+1) tube passes, where N is an integer not less than 1, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0102] The following is combined Figure 9 This section introduces an embodiment of a three-pass heat exchanger. Figure 9This is a schematic diagram of the structure of a third embodiment of the heat exchanger of the present invention.

[0103] Preferably, such as Figure 9 As shown, the heat exchanger of the present invention includes a plurality of first heat exchange tubes 1 and a plurality of second heat exchange tubes 2, wherein the first heat exchange tubes 1 are U-shaped heat exchange tubes and the second heat exchange tubes 2 are straight tubes. The heat exchanger of the present invention also includes a liquid inlet component and a liquid outlet component, wherein the liquid inlet component and the liquid outlet component are respectively located at both ends of the heat exchanger. The liquid inlet component includes a liquid inlet pipe 41 and a liquid inlet chamber 42 communicating with the liquid inlet pipe 41. The liquid outlet component includes a liquid outlet pipe 51 and a liquid outlet chamber 52 communicating with the liquid outlet pipe 51. The inlet ends of the plurality of first heat exchange tubes 1 are communicating with the liquid inlet chamber 42, and the outlet ends of the plurality of second heat exchange tubes 2 are communicating with the liquid outlet chamber 52.

[0104] like Figure 9 As shown, the liquid separation device of the present invention includes a liquid separation component 31 and a flow guiding component 32. The liquid separation component 31 is provided with a liquid separation chamber 311 and an inlet hole 312 and an outlet hole 313 communicating with the liquid separation chamber 311. There are multiple inlet holes 312, each of which is connected to the outlet end of the corresponding first heat exchange tube 1. There are multiple outlet holes 313, each of which is connected to the inlet end of the corresponding second heat exchange tube 2. The flow guiding component 32 is located inside the liquid separation chamber 311 and has a gap between it and the inner wall of the liquid separation chamber 311. The flow guiding component 32 has multiple independent flow guiding channels 321. The first port 3211 and the second port 3212 of the multiple flow guiding channels 321 are respectively provided corresponding to the multiple inlet holes 312 and the multiple outlet holes 313.

[0105] This configuration meets the design requirements of a three-pass heat exchanger.

[0106] In this embodiment, the specific structures of the liquid separation component 31 and the drainage component 32 are the same as those in Embodiment 1, and will not be described again here.

[0107] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A liquid separation device for a heat exchanger, the heat exchanger comprising a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, characterized in that, The liquid separation device includes a liquid separation component and a flow guiding component. The liquid separation component is provided with a liquid separation chamber and liquid inlet holes and liquid outlet holes communicating with the liquid separation chamber. There are multiple liquid inlet holes, each of which is connected to the outlet end of the corresponding first heat exchange tube. There are multiple liquid outlet holes, each of which is connected to the inlet end of the corresponding second heat exchange tube. The flow guiding component is located inside the liquid separation chamber and has a gap between it and the inner wall of the liquid separation chamber. The flow guiding component has multiple independent flow guiding channels. The first port and the second port of the multiple flow guiding channels are respectively provided for the multiple liquid inlet holes and the multiple liquid outlet holes.

2. The liquid separation device according to claim 1, characterized in that, The liquid separation device further includes a plurality of first connecting tubes, one end of which is connected to the first port of the corresponding drainage channel, and the other end of which passes through the corresponding liquid inlet and is inserted into the corresponding first heat exchange tube. The outer diameter of the first connecting tube is smaller than the inner diameter of the first heat exchange tube and the inner diameter of the liquid inlet.

3. The liquid separation device according to claim 2, characterized in that, The liquid separation device also includes multiple speed-reducing pipes, which are respectively arranged between the corresponding first connecting pipe and the drainage channel to reduce the flow rate of refrigerant entering the drainage channel.

4. The liquid separation device according to claim 3, characterized in that, The inner diameter of the deceleration pipe gradually increases along the direction close to the drainage channel.

5. The liquid separation device according to claim 1, characterized in that, The liquid separation device further includes a plurality of second connecting tubes, one end of which is connected to the second port of the corresponding drainage channel, and the other end of which passes through the corresponding liquid outlet and is inserted into the corresponding second heat exchange tube. The outer diameter of the second connecting tube is smaller than the inner diameter of the second heat exchange tube and the inner diameter of the liquid outlet.

6. The liquid separation device according to claim 5, characterized in that, The liquid separation device also includes multiple speed-increasing pipes, which are respectively arranged between the corresponding second connecting pipe and the flow channel to increase the flow rate of refrigerant entering the second connecting pipe.

7. The liquid separation device according to claim 6, characterized in that, The inner diameter of the speed-increasing pipe gradually decreases along the direction closer to the second connecting pipe.

8. The liquid separation device according to claim 1, characterized in that, The drainage channel has at least two second ports, and the liquid distribution component is provided with a liquid outlet hole at each position corresponding to the at least two second ports.

9. The liquid separator according to any one of claims 1 to 8, characterized in that, The drainage channel is formed during the injection molding process of the drainage component.

10. A heat exchanger, characterized in that, The liquid separation device includes any one of claims 1 to 9.

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