Heat exchanger and air conditioning system

Abstract

The application relates to the technical field of air conditioning equipment, and discloses a heat exchanger and an air conditioning system, the heat exchanger comprising a flow collecting assembly, a heat exchange module and a partition plate, the flow collecting assembly being provided with a first flow collecting channel and a liquid outlet communicated with the first flow collecting channel; the heat exchange module being provided with a plurality of heat exchange channels arranged at intervals, the outlets of the plurality of heat exchange channels being all communicated with the first flow collecting channel; the partition plate being provided with at least one through hole for medium flow, and the partition plate being arranged in the first flow collecting channel; along the flow direction of the medium, the partition plate is located downstream of the outlets of a part of the plurality of heat exchange channels in the heat exchange module and is located upstream of the liquid outlet, so that the medium flowing out of the part of the plurality of heat exchange channels flows to the liquid outlet after flowing through the through hole. The application is arranged in the first flow collecting channel corresponding to the outlets of the heat exchange channels, the regulation effect on the pressure drop is greater, the flow regulation range can be larger, and the flow regulation of the heat exchange channels is easier.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and in particular to a heat exchanger and air conditioning system. Background Technology

[0002] This section provides only background information relevant to this application and is not necessarily prior art.

[0003] Heat exchangers are crucial components of air conditioning systems. During evaporation, the uniformity of medium distribution within the multiple heat exchange tubes significantly impacts the heat exchange efficiency. Currently, medium distribution across these tubes is primarily regulated by installing distribution structures at the tube inlets, but this method offers limited adjustment capabilities. Summary of the Invention

[0004] The purpose of this application is to at least solve the problem of limited uniformity in medium distribution in heat exchangers. This purpose is achieved through the following technical solution:

[0005] The first aspect of this application proposes a heat exchanger comprising:

[0006] A flow collection assembly having a first flow collection channel and a liquid outlet communicating with the first flow collection channel;

[0007] The heat exchange module has multiple heat exchange channels spaced apart, and the outlets of the multiple heat exchange channels are all connected to the first collection channel;

[0008] A baffle plate, wherein at least one through hole is provided on the baffle plate for the medium to flow through, and the baffle plate is disposed in the first collection channel;

[0009] Along the flow direction of the medium, the baffle is located downstream of the outlet of a portion of the heat exchange channels in the heat exchange module and upstream of the liquid outlet, so that the medium flowing out of the portion of the heat exchange channels flows through the through hole and then flows to the liquid outlet.

[0010] According to the heat exchanger of this application, by setting a baffle in the first collector channel, the baffle can adjust the flow resistance of the medium in the first collector channel, thereby adjusting the flow resistance of the medium at the outlet of each heat exchange channel and realizing the flow rate regulation of the medium flowing through multiple heat exchange channels. Under evaporation conditions, the medium at the inlet of multiple heat exchange channels usually has two states: liquid and gas. When the medium flows through the heat exchange channel, at least a portion of the liquid medium is converted into a gaseous medium within the heat exchange channel. In the medium flowing out of the heat exchange channel outlet, the proportion of gaseous medium in the total medium is higher than that at the inlet. Thus, the flow pressure drop in the first collector channel connected to the outlet of the heat exchange channel is greater than that at the inlet. This application sets the baffle in the first collector channel corresponding to the outlet of the heat exchange channel, which has a greater effect on the adjustment of pressure drop, thereby achieving a larger flow rate regulation range and making it easier to regulate the flow rate of each heat exchange channel.

[0011] In addition, the heat exchanger according to this application may also have the following additional technical features:

[0012] In some embodiments of this application, there are multiple partitions, and all the partitions are arranged sequentially at intervals in the first flow collection channel along the flow direction of the medium.

[0013] In some embodiments of this application, the through-hole has a cross-section along a direction perpendicular to the flow direction of the medium;

[0014] Along the flow direction of the medium, in two adjacent baffles, the sum of the cross-sectional areas of all the through holes on the downstream baffle is A1, and the sum of the cross-sectional areas of all the through holes on the upstream baffle is A2, where A1 is greater than or equal to A2.

[0015] In some embodiments of this application, the number of through holes on the downstream partition is greater than or equal to the number of through holes on the upstream partition;

[0016] The cross-sectional area of ​​the through hole on the downstream partition is a first area, and the cross-sectional area of ​​the through hole on the upstream partition is a second area, wherein the first area is greater than or equal to the second area.

[0017] In some embodiments of this application, the outlets of the plurality of heat exchange channels are located on both sides of the liquid outlet, and the baffle is provided in the first collection channel on one or both sides of the liquid outlet.

[0018] In some embodiments of this application, the heat exchange module further includes a second manifold channel having a liquid inlet;

[0019] The inlets of all the multiple heat exchange channels are connected to and communicate with the second collection channel.

[0020] In some embodiments of this application, the first and second collection channels are arranged in parallel and are located at opposite ends of the heat exchange channel.

[0021] In some embodiments of this application, the heat exchanger includes at least two heat exchange modules, which are connected in series along the flow direction of the medium. The number of first collection channels is at least two, and each first collection channel corresponds to one of the heat exchange modules. The outlet of any group of heat exchange modules is connected to and communicates with the corresponding first collection channel. At least one of the first collection channels is provided with the baffle plate.

[0022] In some embodiments of this application, the heat exchange module includes two modules, namely a first heat exchange module and a second heat exchange module, wherein the first heat exchange module is located upstream of the second heat exchange module along the flow direction of the medium.

[0023] The second flow collection channel of the first heat exchange module and the first flow collection channel of the second heat exchange module are located at one end of the heat exchange channel and connected as one unit; and / or, the first flow collection channel of the first heat exchange module and the second flow collection channel of the second heat exchange module are located at the other end of the heat exchange channel and connected as one unit, and the liquid outlet of the first flow collection channel of the first heat exchange module is connected to the liquid inlet of the second flow collection channel of the second heat exchange module.

[0024] In some embodiments of this application, the current collection assembly includes a first current collection pipe and a second current collection pipe, the first current collection pipe and the second current collection pipe being located at both ends of the heat exchange module, respectively;

[0025] A partition sealing plate is provided inside the first manifold. One side of the partition sealing plate forms the second manifold channel of the first heat exchange module, and the other side of the partition sealing plate forms the first manifold channel of the second heat exchange module.

[0026] The second manifold forms the first manifold channel of the first heat exchange module and the second manifold channel of the second heat exchange module.

[0027] In some embodiments of this application, the number of through holes is one or more;

[0028] And / or, the through hole includes a circular hole, a square hole, and / or an arc-shaped hole.

[0029] The second aspect of this application proposes an air conditioning system, wherein the heat exchanger includes the heat exchanger proposed in the first aspect of this application.

[0030] The air conditioning system of this application has at least the beneficial effects of the heat exchanger proposed in the first aspect of this application. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 A schematic diagram of a heat exchanger according to an embodiment of this application is shown.

[0033] Figure 2 schematically shown Figure 1 The side view of the heat exchanger shown;

[0034] Figure 3 schematically shown Figure 2 AA section view;

[0035] Figure 4 A schematic diagram of a first partition according to an embodiment of this application is shown;

[0036] Figure 5 A schematic diagram of a second partition according to an embodiment of this application is shown;

[0037] Figure 6 A schematic diagram of a third partition according to an embodiment of this application is shown;

[0038] Figure 7 A schematic diagram of a first partition according to an embodiment of this application is shown;

[0039] Figure 8 A schematic diagram of a second partition according to an embodiment of this application is shown;

[0040] Figure 9 A schematic diagram of a third partition according to an embodiment of this application is shown;

[0041] Figure 10 A schematic diagram of a first partition according to an embodiment of this application is shown;

[0042] Figure 11 A schematic diagram of a second partition according to an embodiment of this application is shown;

[0043] Figure 12 A schematic diagram of a third partition according to an embodiment of this application is shown;

[0044] Figure 13 A schematic diagram of a heat exchanger according to an embodiment of this application is shown.

[0045] Figure 14 schematically shown Figure 13 The image shows a cross-sectional view of the heat exchanger.

[0046] Figure 15 A schematic diagram of a heat exchanger according to an embodiment of this application is shown.

[0047] Figure 16 schematically shown Figure 15 The side view of the heat exchanger shown;

[0048] Figure 17 schematically shown Figure 16 BB cross-sectional view.

[0049] The attached figures are labeled as follows:

[0050] 100. Flow collection assembly; 101. First flow collection channel; 102. Second flow collection channel; 103. First branch channel; 104. First confluence channel; 105. Second branch channel; 106. Second confluence channel; 107. Liquid outlet; 108. Liquid inlet; 110. Flow collection pipe; 111. First flow collection pipe; 112. Second flow collection pipe;

[0051] 200, Heat exchange module; 201, Heat exchange channel; 210, First heat exchange module; 220, Second heat exchange module;

[0052] 300. Partition; 301. First partition; 302. Second partition; 303. Third partition; 304. Fourth partition; 305. Fifth partition; 306. Sixth partition; 307. Seventh partition; 310. Through hole;

[0053] 400. Separating sealing plate. Detailed Implementation

[0054] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0055] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0056] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0057] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0058] like Figure 1 middle Figure 17 As shown, according to an embodiment of this application, a heat exchanger is proposed, including a manifold assembly 100, a heat exchange module 200, and a baffle plate 300.

[0059] The flow collection assembly 100 has a first flow collection channel 101 and a liquid outlet 107 communicating with the first flow collection channel 101. The heat exchange module 200 has a plurality of heat exchange channels 201 spaced apart, and the outlets of the plurality of heat exchange channels 201 are all communicating with the first flow collection channel 101. The partition 300 is provided with at least one through hole 310 for medium to flow through, and the partition 300 is disposed within the first flow collection channel 101. Along the flow direction of the medium, the partition 300 is located downstream of the outlets of a portion of the heat exchange channels 201 in the heat exchange module 200 and upstream of the liquid outlet 107, so that the medium flowing out of a portion of the heat exchange channels 201 flows through the through hole 310 and then flows to the liquid outlet 107.

[0060] The heat exchanger of this embodiment can be applied to air conditioning systems, specifically as an evaporator or condenser, with the refrigerant flowing within the system as the medium. This embodiment primarily focuses on the heat exchanger in evaporation mode, i.e., when used as an evaporator. Before entering the evaporator, the medium is typically in a state where gas and liquid coexist.

[0061] The heat exchange module 200 is mainly used to complete the heat exchange between the medium and the external environment, so as to cool or heat the external environment. The heat exchange module 200 can be a finned heat exchange component or a parallel flow heat exchange component. The manifold assembly 100 is mainly used for the distribution and convergence of the medium. The manifold assembly 100 is usually a manifold pipe 110, and the channel inside the manifold pipe 110 is also the manifold channel. The manifold assembly 100 and the heat exchange module 200 can be integrally processed, or they can be processed separately and then fixedly connected as one unit.

[0062] In one specific implementation, the flow collector assembly 100 further includes a second flow collector channel 102, which has a liquid inlet 108. The inlets of the multiple heat exchange channels 201 of the heat exchange module 200 are all connected to the second flow collector channel 102. Both the first flow collector channel 101 and the heat exchange channels 201 are used for media flow. The media flows into the second flow collector channel 102 from the liquid inlet 108, then flows to multiple heat exchange channels 201 for heat exchange, and flows into the first flow collector channel 101. After converging in the first flow collector channel 101, the media flows out through the liquid outlet 107.

[0063] In this embodiment, the heat exchange channel 201 can be formed directly through a pipe. For example, a heat exchange tube capable of heat transfer can be provided inside the heat exchange module 200, and the channel of the heat exchange tube forms the heat exchange channel 201. Alternatively, the heat exchange channel 201 can be a tubular structure formed by a shell that allows the medium to flow. For example, the shell of the heat exchange module 200 includes two mating parts, and grooves are correspondingly provided on the two parts. The grooves mating together form a through hole 310, and the structure corresponding to the through hole 310 forms the heat exchange channel 201.

[0064] It should also be noted that the heat exchange channel 201 of the heat exchange module 200 can be directly connected to the first collection channel 101 and / or the second collection channel 102, or they can be connected through a pipe.

[0065] Multiple heat exchange channels 201 refers to two or more heat exchange channels 201. The outlets of the multiple heat exchange channels 201 are connected to different positions of the first collection channel 101. Specifically, multiple connecting holes 310 are provided on the circumferential sidewall of the first collection channel 101. The multiple connecting holes 310 are arranged sequentially along the axial direction of the first collection channel 101 and are connected to the multiple heat exchange channels 201 one by one.

[0066] The baffle 300 is located downstream of the outlets of a portion of the heat exchange channels 201. This means that within the same heat exchange module 200, the medium flowing out of some of the heat exchange channels 201 needs to pass through the baffle 300 before flowing to the liquid outlet 107, while the medium from another portion of the heat exchange channels 201 flows directly to the liquid outlet 107 without passing through the baffle 300. In other words, after the medium flows out of the outlet of the heat exchange channel 201, the medium upstream of the baffle 300 flows to the liquid outlet 107 through the through-hole 310, while the medium downstream of the baffle 300 does not pass through the baffle 300 and flows to the liquid outlet 107 along the first collection channel 101.

[0067] The baffle 300 can be in the form of a sheet, and can be fixedly connected to the inner wall of the first collecting channel 101. Specifically, the circumferential edge of the baffle 300 is fixedly connected to the inner wall of the first collecting channel 101. In one implementation, the shape of the baffle 300 is adapted to the shape and size of the cross-section (the cross-section perpendicular to the flow direction of the medium, i.e., the cross-section perpendicular to the axial direction of the first collecting channel 101) of the first collecting channel 101, and the circumferential edge of the baffle 300 is completely fitted and fixedly connected to the inner wall of the first collecting channel 101. In another implementation, the circumferential edge of the baffle 300 is partially connected to the inner wall of the first collecting channel 101. In this case, a through hole is formed between the baffle 300 and the inner wall of the first collecting channel 101. This through hole can also serve as a through hole 310 for the medium to pass through.

[0068] The number of through holes 310 can be one or more, with any one through hole 310 penetrating both sides of the partition plate 300. When there are multiple through holes 310, they are distributed on the partition plate 300. The shape of the through holes 310 can be set as needed, specifically, it can be a circular hole, a square hole, an arc-shaped hole, or other shapes. When there are multiple through holes 310, the shapes of the multiple through holes 310 can be the same or different. For example, all of the multiple through holes 310 can be set as circular; another example is that some of the multiple through holes 310 are set as circular, and the remaining through holes 310 are set as square.

[0069] It should be noted that the surface of the baffle 300 can be arranged perpendicular to the axial direction of the first flow collecting channel 101, or it can be arranged at an angle relative to the axial direction of the first flow collecting channel 101, as long as it can ensure that the medium flows through the through hole 310 to multiple heat exchange channels. When there is one through hole 310, the through hole 310 can be set at any position on the surface of the baffle 300; when there are multiple through holes 310, the multiple through holes 310 can be distributed on the surface of the baffle 300 in any form.

[0070] According to the heat exchanger of this embodiment, the baffle 300 can adjust the medium flow resistance within the first manifold 101. Typically, the medium flow resistance upstream of the baffle 300 differs from that at other locations. Consequently, the medium flow resistance within the heat exchange channel 201 upstream of the baffle 300 differs from that within other locations of the heat exchange channel 201. By providing the baffle 300 within the first manifold 101, the medium flow resistance at the outlets of multiple heat exchange channels 201 can be adjusted, thereby regulating the flow rate of the medium flowing through the multiple heat exchange channels 201.

[0071] In existing technologies, the distribution structure is mostly located at the inlet of the heat exchange channel 201. This results in a limited liquid distribution adjustment range, and the liquid distribution volume between each heat exchange tube affects each other, making adjustment difficult. Furthermore, under evaporation conditions, gaseous and liquid media coexist at the inlet of the heat exchange channel 201. The distribution structure must consider the combined effects of both gaseous and liquid media during design, which is typically quite challenging. In some cases, due to the mutual influence between gas and liquid, the distribution structure may not achieve the desired effect after installation.

[0072] In this embodiment, the baffle 300 is placed at the outlet of the heat exchange channel 201. Since at least a portion (possibly all) of the liquid medium transforms into a gaseous medium within the heat exchange channel 201 as it flows through it, the proportion of gaseous medium in the total medium flowing out of the outlet of the heat exchange channel 201 is higher than at the inlet. Therefore, the flow pressure drop in the first collection channel 101 connected to the outlet of the heat exchange channel 201 is greater than at the inlet, and the baffle 300 has a greater effect on regulating the pressure drop. This results in a larger flow rate regulation range and easier flow rate regulation in each heat exchange channel 201. Furthermore, since only gaseous medium may remain at the outlet of the heat exchange channel 201, the influence of the baffle 300 on the gaseous medium only needs to be considered when setting the baffle 300. Compared to placing the baffle 300 at the inlet of the heat exchange channel 201 (where the medium exists in both gaseous and liquid states), this embodiment offers higher controllability in medium distribution regulation.

[0073] In this embodiment, the number of baffles 300 can be one or more. In one specific embodiment, multiple baffles 300 are provided in the first flow channel 101, and the multiple baffles 300 are arranged sequentially at intervals along the medium flow direction. Among them, a certain number of heat exchange channels 201 are provided upstream of each baffle 300.

[0074] It is understandable that by setting multiple baffles 300, the medium flow resistance in the first heat exchange channel 201 can be adjusted multiple times, thereby making the medium flow resistance adjustment of the multiple heat exchange channels 201 more precise. This is beneficial for the medium to be distributed as needed in the multiple heat exchange channels 201, thus improving the heat exchange efficiency of the heat exchanger.

[0075] Furthermore, the through-hole 310 has a cross-section perpendicular to the flow direction of the medium. In the flow direction of the medium, the sum of the cross-sectional areas of all through-holes 310 on the downstream baffle 300 is A1, and the sum of the cross-sectional areas of all through-holes 310 on the upstream baffle 300 is A2, where A1 is greater than or equal to A2.

[0076] It is understandable that the sum of the cross-sectional areas of all through holes 310 on the partition 300 can be considered as the medium flow area of ​​the partition 300. A1 is not less than A2, ensuring that the flow area of ​​the downstream partition within the same heat exchange module 200 is not less than that of the upstream partition. Since there are more heat exchange channels 201 upstream of the downstream partition, the required medium flow rate is larger. This design ensures smooth medium flow and provides suitable medium flow resistance at the outlets of multiple heat exchange channels 201.

[0077] In one specific embodiment, the difference in medium flow area between the upstream and downstream baffles 300 is achieved by the different areas of individual through holes 310. Specifically, the cross-sectional area of ​​the through hole 310 on the downstream baffle 300 is a first area, and the cross-sectional area of ​​the through hole 310 on the upstream baffle 300 is a second area, where the first area is greater than or equal to the second area. Thus, when the cross-sectional areas of other through holes 310 are the same, the medium flow area of ​​the upstream baffle 300 is less than or equal to the medium flow area of ​​the downstream baffle 300.

[0078] Specifically, such as Figures 4 to 6 When multiple partitions 300 each have a circular hole, the diameter of the circular hole in the downstream partition 300 is greater than or equal to the diameter of the circular hole in the upstream partition 300. Figures 7 to 9 As shown, when multiple partitions 300 each have a square hole, the side length of the square hole in the downstream partition 300 is greater than or equal to the diameter of the circular hole in the upstream partition 300.

[0079] In another specific embodiment, the difference in the medium flow area of ​​the upstream and downstream baffles 300 can be achieved by varying the number of through holes 310. That is, the number of through holes 310 on the downstream baffle 300 is greater than or equal to the number of through holes 310 on the upstream baffle 300. Thus, when the area of ​​each through hole 310 is the same, the medium flow area of ​​the upstream baffle 300 is less than or equal to the medium flow area of ​​the downstream baffle 300.

[0080] Specifically, such as Figures 10 to 12 As shown, each partition 300 has multiple through holes 310, each through hole 310 having the same diameter, and the number of through holes 310 on the upstream partition 300 is less than the number of through holes 310 on the upstream partition 300.

[0081] It should be noted that the difference in medium flow area among multiple baffles 300 can also be achieved by combining the number of through holes 310 and the area of ​​each through hole. For example, the number of through holes 310 and the diameter of each through hole 310 in the upstream baffle 300 are both smaller than those in the downstream baffle 300. It should also be noted that the through holes 310 between multiple baffles 300 can have different shapes. For example, one baffle 300 may have a circular through hole, while another baffle 300 may have a square through hole, as long as the medium flow area of ​​the upstream baffle 300 is less than or equal to that of the downstream baffle 300.

[0082] In one embodiment of this method, the outlets of the multiple heat exchange channels 201 are located on both sides of the liquid outlet 107, and the first collecting channel 101 is provided with a baffle 300 on one or both sides of the liquid outlet 107. A specific embodiment is given below for each of the multiple baffles 300 located on one or both sides of the liquid outlet 107.

[0083] In one specific embodiment, multiple baffles 300 are disposed on one side of the liquid outlet 107. Specifically, as... Figures 1 to 3 As shown, the outlet 107 of the first collecting channel 101 is located on the side wall near its first end ( Figure 3 At the position shown at the upper end), the outlet of a small number of heat exchange channels 201 is located at the first end of the liquid outlet 107. Figure 3 As shown at the upper end), the outlet of most of the heat exchange channels 201 is located at the second end of the liquid outlet 107. Figure 3 As shown at the lower end), a plurality of baffles 300 are provided in the first flow channel 101 located on the side of the outlet 107 near the second end. Each baffle 300 is provided with a through hole 310, and the medium flow area of ​​the upstream baffle 300 is smaller than that of the downstream baffle 300.

[0084] In this embodiment, as Figure 3As shown, there are three baffles 300, namely the first baffle 301, the second baffle 302, and the third baffle 303. The first baffle 301, the second baffle 302, and the third baffle 303 are arranged sequentially along the direction of medium flow (e.g., ...). Figure 3 The arrangement is spaced out from bottom to top (as shown). In a specific implementation, such as... Figures 4 to 6 Each of the first partition 301, the second partition 302, and the third partition 303 is provided with a circular through hole 310. The diameter of the through hole 310 on the first partition 301 is smaller than the diameter of the through hole 310 on the second partition 302, and the diameter of the through hole 310 on the second partition 302 is smaller than the diameter of the through hole 310 on the third partition 303. In another specific embodiment, such as... Figures 7 to 9 As shown, a square through hole 310 is provided on the first partition 301, the second partition 302, and the third partition 303. The side length of the through hole 310 on the first partition 301 is smaller than the side length of the through hole 310 on the second partition 302, and the side length of the through hole 310 on the second partition 302 is smaller than the side length of the through hole 310 on the third partition 303. In another implementation, such as... Figures 10 to 12 As shown, the first partition 301, the second partition 302 and the third partition 303 are all provided with a plurality of small circular through holes 310, and the through holes 310 are the same size. The number of through holes 310 on the first partition 301 is less than the number of through holes 310 on the second partition 302, and the side length of the through holes 310 on the second partition 302 is less than the number of through holes 310 on the third partition 303.

[0085] like Figure 1 and Figure 3 (The arrows in the diagram indicate the direction of medium flow.) As shown in the above specific embodiment, after the medium flows into the second collection channel 102 from the inlet 108, it flows to multiple heat exchange channels 201. After heat exchange in the heat exchange channels 201, it is located upstream of the first partition 301 ( Figure 3 The medium flowing out of the heat exchange channel 201 (shown below) sequentially passes through the first partition 301, the second partition 302, and the third partition 303 to the liquid outlet 107. The medium flowing out of the heat exchange channel 201 located between the first partition 301 and the second partition 302 sequentially passes through the second partition 302 and the third partition 303 to the liquid outlet 107. The medium flowing out of the heat exchange channel 201 located between the second partition 302 and the third partition 303 sequentially passes through the third partition 303 to the liquid outlet 107. The medium at the first end of the liquid outlet 107 (shown below) Figure 3 The medium flowing out of the heat exchange channel 201 (shown at the upper end) flows directly to the liquid outlet 107.

[0086] In another specific embodiment, multiple baffles 300 are disposed on both sides of the liquid outlet 107. For example... Figure 13 and Figure 14 As shown, the outlet 107 of the first collection channel 101 is located in the middle of the side wall, and the outlets of half of the heat exchange channels 201 are located at the first end of the outlet 107. Figure 14 The outlet of the other half of the heat exchange channels 201 is located at the second end of the liquid outlet 107 (as shown at the upper end). Figure 14 As shown at the lower end), multiple baffles 300 are provided on both the upper and lower sides of the outlet 107. Each baffle 300 is provided with a through hole 310. Among the multiple baffles 300 located on the same side, the medium flow area of ​​the upstream baffle 300 is smaller than that of the downstream baffle 300.

[0087] In this embodiment, as Figure 14 As shown, one side of the outlet 107 ( Figure 14 As shown above, two baffles 300 are provided, namely the fourth baffle 304 and the fifth baffle 305, wherein the fifth baffle 305 is located downstream of the fourth baffle 304; on the other side of the liquid outlet 107 ( Figure 14 As shown below, two baffles 300 are provided, namely the sixth baffle 306 and the seventh baffle 307, with the seventh baffle 307 located downstream of the sixth baffle 306. The medium flow area of ​​the fifth baffle 305 is greater than that of the fourth baffle 304. Specifically, the fifth baffle 305 can correspond to the arrangement of the second baffle 302 (or the third baffle 303) mentioned above, and the fourth baffle 304 can correspond to the arrangement of the first baffle 301 mentioned above (when the fifth baffle 305 corresponds to the third baffle 303, the fourth baffle 304 can also correspond to the second baffle 302), so that the medium flow area can be different by the different areas of individual through holes or the different numbers of through holes 310. The medium flow area of ​​the seventh partition 307 is greater than that of the sixth partition 306. Specifically, the seventh partition 307 can correspond to the arrangement of the second partition 302 (or the third partition 303) mentioned above, and the sixth partition 306 can correspond to the arrangement of the first partition 301 mentioned above (when the seventh partition 307 corresponds to the third partition 303, the sixth partition 306 can also correspond to the second partition 302). The different medium flow areas can be achieved by the different areas of individual through holes 310 or the different number of through holes 310.

[0088] like Figure 13 and Figure 14 (The arrows in the diagram indicate the direction of medium flow.) As shown in the specific embodiment above, after the medium flows into the second collection channel 102 from the inlet 108, it flows to multiple heat exchange channels 201. After heat exchange in the heat exchange channels 201, it is located upstream of the fourth partition 304 ( Figure 14The medium flowing out of the heat exchange channel 201 (as shown above) sequentially passes through the fourth partition 304 and the fifth partition 305 to the liquid outlet 107. The medium flowing out of the heat exchange channel 201 located between the fourth partition 304 and the fifth partition 305 passes through the fifth partition 305 to the liquid outlet 107; the medium located upstream of the sixth partition 306 ( Figure 14 The medium flowing out of the heat exchange channel 201 (shown below) flows sequentially through the sixth partition 306 and the seventh partition 307 to the liquid outlet 107. The medium flowing out of the heat exchange channel 201 located between the sixth partition 306 and the seventh partition 307 flows through the seventh partition 307 to the liquid outlet 107. The medium flowing out of the heat exchange channel 201 located between the fifth partition 305 and the seventh partition 307 flows directly to the liquid outlet 107.

[0089] In this embodiment, the heat exchanger can be a single-pass heat exchanger or a multi-pass heat exchanger. In this embodiment, one heat exchange module 200 is one pass, and the heat exchange channels 201 in the same pass (i.e. the same heat exchange module 200) are arranged in parallel.

[0090] Specifically, in a single-pass heat exchanger, such as Figures 1 to 3 , Figure 13 and Figure 14 As shown, multiple heat exchange channels 201 in the heat exchange module 200 are arranged in parallel, and the two ends of the multiple heat exchange channels 201 are aligned. One end (left end, i.e., inlet) is connected to the second manifold channel 102, and the other end (right end, i.e., outlet) is connected to the second manifold channel 102. In the single-pass heat exchanger, the first manifold channel 101 and the second manifold channel 102 are arranged in parallel, and there is only one second manifold channel 102 and one first manifold channel 101. The liquid outlet 107 of the first manifold channel 101 forms the total outlet of the heat exchanger, and the liquid inlet 108 of the second manifold channel 102 forms the total inlet of the heat exchanger.

[0091] It should be noted that the structure and size of the multiple heat exchange channels 201 can be the same, and the multiple heat exchange channels 201 are arranged in parallel and spaced apart from each other.

[0092] In a multi-flow heat exchanger, the heat exchanger includes at least two heat exchange modules 200, which are connected in series along the flow direction of the medium; that is, the heat exchanger includes at least two series-connected flows. There are at least two first manifold channels 101, each corresponding to a heat exchange module 200. The outlets of multiple heat exchange channels 201 of any heat exchange module 200 are connected and communicate with the corresponding first manifold channel 101. At least one first manifold channel 101 is equipped with a baffle 300.

[0093] In the multi-process heat exchanger, the first manifold 101 corresponding to the upstream heat exchange module 200 is connected to the second manifold 102 of the downstream heat exchange module 200. Specifically, the liquid outlet 107 of the upstream first manifold 101 is connected to the liquid inlet 108 of the downstream second manifold 102, so that adjacent heat exchange modules 200 are connected in series. Multiple heat exchange channels 201 within the same heat exchange module 200 are arranged in parallel. Among the multiple heat exchange modules 200, the liquid inlet 108 of the second manifold 102 corresponding to the upstreammost heat exchange module 200 is the total inlet of the heat exchanger, and the liquid outlet 107 of the first manifold 101 corresponding to the downstreammost heat exchange module 200 is the total outlet of the heat exchanger. A baffle 300 can be installed in any of the first manifold channels 101 corresponding to any heat exchange module 200, or a baffle 300 can be installed in some of the first manifold channels 101. The specific installation method of the baffle 300 in each first manifold channel 101 can refer to the installation method of the baffle 300 in a single-pass heat exchanger.

[0094] Specifically, such as Figures 15 to 17 As shown, a two-process heat exchanger is used as an example for detailed explanation. Specifically, the heat exchange module 200 includes two modules: a first heat exchange module 210 and a second heat exchange module 220. The first heat exchange module 210 is located upstream of the second heat exchange module 220.

[0095] For ease of description and understanding, in this embodiment, the second flow collection channel 102 corresponding to the first heat exchange module 210 is defined as the first flow branch channel 103, the first flow collection channel 101 corresponding to the first heat exchange module 210 is defined as the first flow confluence channel 104, the second flow collection channel 102 corresponding to the second heat exchange module 220 is defined as the second flow branch channel 105, and the first flow collection channel 101 corresponding to the second heat exchange module 220 is defined as the second flow confluence channel 106.

[0096] like Figure 17 As shown, the inlet 108 of the first branch channel 103 forms the total inlet of the heat exchanger. The outlet 107 of the first manifold 104 is connected to the inlet 108 of the second branch channel 105. The outlet 107 of the second manifold 106 forms the total outlet of the heat exchanger. Two baffles 300 are provided in both the first manifold 104 and the second manifold 106. In the first manifold 104, the media flow area of ​​the upstream baffle 300 along the media flow direction is smaller than that of the downstream baffle 300. Similarly, in the second manifold 106, the media flow area of ​​the upstream baffle 300 along the media flow direction is smaller than that of the downstream baffle 300.

[0097] The first heat exchange module 210 and the second heat exchange module 220 can be arranged sequentially along the axial direction of the heat exchange channel 201. In this case, each collection channel can correspond to an independent collection pipe 110, that is, one collection pipe 110 forms a first collection channel 101 or a second collection channel 102. The first heat exchange module 210 and the second heat exchange module 220 can also be arranged sequentially along the axial direction perpendicular to the heat exchange channel 201 (perpendicular to the axial direction of the heat exchange channel 201, that is, the axial direction of the first heat exchange channel 201 or the second heat exchange channel 201). In this case, the second collection channel 102 of the first heat exchange module 210 and the first collection channel 101 of the second heat exchange module 220 are located at one end of the heat exchange channel 201 and connected as a whole. The first flow channel 101 of the first heat exchange module 210 and the second flow channel 102 of the second heat exchange module 220 are located at the other end of the heat exchange channel 201 and are connected as one unit. The liquid outlet 107 of the first flow channel 101 of the first heat exchange module 210 is connected to the liquid inlet 108 of the second flow channel 102 of the second heat exchange module 220.

[0098] Specifically, the manifold assembly 100 includes a first manifold 111 and a second manifold 112, which are located at opposite ends of the heat exchange module 200. A partition sealing plate 400 is disposed within the first manifold 111. One side of the partition sealing plate 400 forms a second manifold channel 102 (i.e., a first branch channel 103) for the first heat exchange module 210, and the other side forms a first manifold channel 101 (i.e., a second confluence channel 106) for the second heat exchange module 220. The second manifold 112 forms both a first manifold channel 101 (i.e., a first confluence channel 104) for the first heat exchange module 210 and a second manifold channel 102 (i.e., a second branch channel 105) for the second heat exchange module 220. The second manifold 112 is of equal diameter, and the first confluence channel 104 and the second branch channel 105 are directly connected via the second manifold 112.

[0099] like Figure 15 and Figure 17 (The arrows in the diagram indicate the direction of medium flow.) As shown, in the two-process heat exchanger described above, the medium flows from the main inlet of the heat exchanger (i.e., the liquid inlet 108 of the first branch channel 103) into the first branch channel 103 and then flows to the multiple heat exchange channels 201 of the first heat exchange module 210. After completing one heat exchange in the multiple heat exchange channels 201, the medium flows upstream of the baffle 300 in the first confluence channel 104. Figure 17The medium flowing out of the heat exchange channel 201 (shown below) flows through the partition 300 to the second branch channel 105, while the medium flowing out of other heat exchange channels 201 flows directly to the second branch channel 105. The medium flowing into the second branch channel 105 then flows into the multiple heat exchange channels 201 of the second heat exchange module 220. After completing secondary heat exchange in the multiple heat exchange channels 201, the medium flows upstream of the partition 300 in the second confluence channel 106 (shown below). Figure 17 The medium flowing out of the heat exchange channel 201 (shown below) flows through the baffle 300 to the total outlet of the heat exchanger (i.e., the liquid outlet 107 of the second manifold 106), while the medium flowing out of other heat exchange channels 201 flows directly to the total outlet of the heat exchanger (i.e., the liquid outlet 107 of the second manifold 106).

[0100] In one specific embodiment of this implementation, the inlet end of the heat exchange channel 201 is inserted into the second collection channel 102, and the outlet end of the heat exchange channel 201 is inserted into the first collection channel 101. Specifically, as shown... Figure 3 , Figure 14 and Figure 17 As shown, the heat exchange module 200 includes multiple heat exchange tubes spaced apart, forming a heat exchange channel 201. The inlet end of the heat exchange tube is inserted into the second manifold 102, and the outlet end of the heat exchange tube is inserted into the first manifold 101. This makes it easier for the medium to flow from the second manifold 102 into the heat exchange tube (i.e., the heat exchange channel 201), which is beneficial for the distribution of the medium in the multiple heat exchange tubes of the heat exchange module 200.

[0101] In this embodiment, the heat exchanger can also have a distribution structure at the inlet of the heat exchange module 200. This distribution structure can be located between the total inlet of the heat exchanger and the inlets of all heat exchange tubes in the upstream heat exchange module 200, allowing the medium to flow to all heat exchange tubes in the upstream heat exchange module 200 after passing through the distribution structure. Specifically, the distribution structure can be the same as the baffle 300. The distribution structure can accelerate the medium, enabling it to flow to the inlets of all heat exchange tubes in the upstream heat exchange module 200, ensuring that all heat exchange tubes have medium flowing through them, which is beneficial for the uniform distribution of the medium.

[0102] Furthermore, in this embodiment, the lengths of multiple heat exchange tubes in the same heat exchange module 200 inserted into the second manifold channel 102 can be sequentially increased along the direction from near the liquid inlet 108 to away from the liquid inlet 108. At positions away from the liquid inlet 108, the medium is less abundant. By sequentially increasing the lengths of multiple heat exchange tubes inserted into the second manifold channel 102, the likelihood of the heat exchange tubes contacting the medium increases at positions away from the liquid inlet 108, which is beneficial for liquid distribution into all heat exchange tubes.

[0103] In this embodiment, the heat exchange module 200 of the heat exchanger can be a flat tube or a round tube. Specifically, the heat exchange channel 201 can be circular or flat in cross-section, or the heat exchange module 200 as a whole can be flat or round.

[0104] In summary, compared to the existing distribution structure where the heat exchanger is located at the inlet of each process heat exchange channel 201, the heat exchanger in this embodiment has its baffle 300 located at the outlet. Because the dryness of the medium (refrigerant) is higher (gas mass flow rate ratio), its flow pressure drop is greater, which allows for a wider range of flow rate adjustment and easier flow rate adjustment in each branch. Consequently, the number of distribution components can be reduced or the distribution structure can be simplified, thereby reducing processing costs.

[0105] This embodiment also provides an air conditioning system, including the heat exchanger proposed in this embodiment.

[0106] Specifically, the heat exchanger can be used as the evaporator of the air conditioning system, which also includes components such as the compressor, condenser, and expansion valve.

[0107] The air conditioning system of this embodiment has the same beneficial effects as the heat exchanger proposed in this embodiment.

[0108] The above description is merely a preferred 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 technical scope 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 heat exchanger, characterized in that, include: A flow collection assembly having a first flow collection channel and a liquid outlet communicating with the first flow collection channel; The heat exchange module has multiple heat exchange channels spaced apart, and the outlets of the multiple heat exchange channels are all connected to the first collection channel; A baffle plate, wherein at least one through hole is provided on the baffle plate for the medium to flow through, and the baffle plate is disposed in the first collection channel; Along the flow direction of the medium, the baffle is located downstream of the outlet of a portion of the heat exchange channels in the heat exchange module and upstream of the liquid outlet, so that the medium flowing out of the portion of the heat exchange channels flows through the through hole and then flows to the liquid outlet. The number of baffles is multiple, and all the baffles are arranged sequentially at intervals in the first flow collection channel along the flow direction of the medium. The through holes have cross-sections along the flow direction of the medium. Along the flow direction of the medium, in two adjacent baffles, the sum of the cross-sectional areas of all the through holes on the downstream baffle is A1, and the sum of the cross-sectional areas of all the through holes on the upstream baffle is A2, where A1 is greater than or equal to A2.

2. The heat exchanger according to claim 1, characterized in that, The number of through holes on the downstream partition is greater than or equal to the number of through holes on the upstream partition; The cross-sectional area of ​​the through hole on the downstream partition is a first area, and the cross-sectional area of ​​the through hole on the upstream partition is a second area, wherein the first area is greater than or equal to the second area.

3. The heat exchanger according to claim 1, characterized in that, The outlets of the multiple heat exchange channels are located on both sides of the liquid outlet, and the first collection channel is provided with the baffle on one or both sides of the liquid outlet.

4. The heat exchanger according to claim 1, characterized in that, The heat exchange module further includes a second collection channel, which has a liquid inlet. The inlets of all the multiple heat exchange channels are connected to and communicate with the second flow collection channel.

5. The heat exchanger according to claim 4, characterized in that, The first and second collection channels are arranged in parallel and are located at opposite ends of the heat exchange channel.

6. The heat exchanger according to claim 4 or 5, characterized in that, The heat exchanger includes at least two heat exchange modules, which are connected in series along the flow direction of the medium. The number of first collection channels is at least two, and each first collection channel corresponds to one of the heat exchange modules. The outlet of any group of heat exchange modules is connected to and communicates with the corresponding first collection channel. At least one of the first collection channels is provided with the baffle plate.

7. The heat exchanger according to claim 6, characterized in that, The heat exchange module includes two modules, namely a first heat exchange module and a second heat exchange module. Along the flow direction of the medium, the first heat exchange module is located upstream of the second heat exchange module. The second flow collection channel of the first heat exchange module and the first flow collection channel of the second heat exchange module are located at one end of the heat exchange channel and connected as one unit; and / or the first flow collection channel of the first heat exchange module and the second flow collection channel of the second heat exchange module are located at the other end of the heat exchange channel and connected as one unit, and the liquid outlet of the first flow collection channel of the first heat exchange module is connected to the liquid inlet of the second flow collection channel of the second heat exchange module.

8. The heat exchanger according to claim 7, characterized in that, The current collection assembly includes a first current collection pipe and a second current collection pipe, which are located at opposite ends of the heat exchange module. A partition sealing plate is provided inside the first manifold. One side of the partition sealing plate forms the second manifold channel of the first heat exchange module, and the other side of the partition sealing plate forms the first manifold channel of the second heat exchange module. The second manifold forms the first manifold channel of the first heat exchange module and the second manifold channel of the second heat exchange module.

9. The heat exchanger according to any one of claims 1-5, characterized in that, The number of through holes is one or more; And / or, the through hole includes a circular hole, a square hole, and / or an arc-shaped hole.

10. An air conditioning system, characterized in that, Includes the heat exchanger as described in any one of claims 1-9.

Images