Micro-channel heat exchanger and heating and ventilation equipment with same

Abstract

The utility model discloses a microchannel heat exchanger and heating and ventilation equipment with the microchannel heat exchanger, the microchannel heat exchanger comprises a first microchannel flat tube, a second microchannel flat tube, a connecting assembly, a first fin group and a second fin group, in a first direction, the first microchannel flat tube and the second microchannel flat tube are arranged at an interval; the connecting assembly is connected with the first micro-channel flat pipe and the second micro-channel flat pipe, the first fin set and the second fin set are arranged in the first direction, each fin set comprises a plurality of fins arranged at intervals in the second direction, the first fin set is installed on the first micro-channel flat pipe, the second fin set is installed on the second micro-channel flat pipe, and the first fin set and the second fin set are arranged in the first direction. The first direction is perpendicular to the second direction. According to the micro-channel heat exchanger, the heat exchange performance of the micro-channel heat exchanger is improved, meanwhile, the assembling difficulty of the micro-channel heat exchanger can be reduced, and the assembling efficiency is improved.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420621418.3 and application date March 27, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The utility model relates to the technical field of air temperature regulation, in particular to a microchannel heat exchanger and a HVAC device having the same. Background Art

[0004] Microchannel heat exchangers are generally composed of microchannel flat tubes, collecting tubes, fins and other structures. They are widely used in the air-conditioning field because of their advantages such as light weight and small size.

[0005] However, the existing microchannel heat exchanger has poor heat exchange performance and is relatively complicated to assemble, which makes it difficult to ensure the assembly accuracy of the microchannel heat exchanger and also reduces the production efficiency of the microchannel heat exchanger. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide a microchannel heat exchanger, which not only has good heat exchange performance but also is simple and convenient to assemble, thus solving the technical problems of poor heat exchange performance and complex assembly of the microchannel heat exchanger in the prior art.

[0007] The second purpose of the utility model is to provide a HVAC equipment having the above-mentioned microchannel heat exchanger.

[0008] According to the microchannel heat exchanger of the embodiment of the utility model, it includes: a first microchannel flat tube and a second microchannel flat tube, in a first direction, the first microchannel flat tube and the second microchannel flat tube are arranged at intervals; a connecting component, the connecting component is respectively connected to the first microchannel flat tube and the second microchannel flat tube; a first fin group and a second fin group, the first fin group and the second fin group are arranged in the first direction, each fin group includes a plurality of fins arranged at intervals along the second direction, the first fin group is installed to the first microchannel flat tube, the second fin group is installed to the second microchannel flat tube, and the first direction and the second direction are arranged perpendicularly.

[0009] According to the microchannel heat exchanger of the embodiment of the utility model, by setting the first microchannel flat tube and the second microchannel flat tube, the first microchannel flat tube and the second microchannel flat tube cooperate to effectively improve the heat exchange performance of the microchannel heat exchanger; by setting a connecting component and connecting the connecting component to the first microchannel flat tube and the second microchannel flat tube respectively, the first microchannel flat tube and the second microchannel flat tube arranged at intervals in the first direction can be formed into an integral part, so that during the assembly process of the microchannel heat exchanger, the first microchannel flat tube and the second microchannel flat tube can be connected to the external structural parts at the same time, reducing the connection difficulty and improving the connection efficiency; at the same time, by setting the first fin group and the second fin group arranged in the first direction, the first microchannel flat tube and the second microchannel flat tube can correspond to a group of fins separately, while improving the heat exchange performance of the first microchannel flat tube and the second microchannel flat tube, the assembly difficulty of the first microchannel flat tube and the second microchannel flat tube and the fins can also be reduced, so that the assembly of the microchannel heat exchanger is simple and convenient. Therefore, the microchannel heat exchanger of the present application is not only simple and convenient to assemble, but also has good heat exchange performance.

[0010] In some embodiments, the first fin group is located on the windward side of the second fin group, and the heat transfer coefficient of the second fin group is greater than the heat transfer coefficient of the first fin group.

[0011] In some embodiments, the number of fins of the second fin group is greater than the number of fins of the first fin group; and / or the shape of the fins of the first fin group is different from the shape of the fins of the second fin group.

[0012] In some embodiments, an air channel is provided between adjacent fins of each group of the fins; at least a portion of the fins of the second fin group are provided with a spoiler, and a spoiler space communicating with the air channel is provided between the spoiler and the corresponding fin.

[0013] In some embodiments, the first microchannel flat tube and the second microchannel flat tube are spaced apart in the height direction.

[0014] In some embodiments, the first microchannel flat tube is located on the windward side of the second microchannel flat tube, and the heat exchange area of ​​the first microchannel flat tube is greater than the heat exchange area of ​​the second microchannel flat tube.

[0015] In some embodiments, the connection assembly includes a plurality of connectors, and the plurality of connectors are connected between the first microchannel flat tube and the second microchannel flat tube at intervals in the second direction, and a drainage port is formed between two adjacent connectors.

[0016] In some embodiments, in the second direction, at least one end of at least a portion of the connecting members is provided with a water guiding surface extending downward.

[0017] In some embodiments, the bottom of the connecting member is flush with the bottom of the first microchannel flat tube and / or the second microchannel flat tube.

[0018] In some embodiments, a portion of the connecting member protrudes toward the bottom of the first microchannel flat tube and / or the second microchannel flat tube.

[0019] In some embodiments, the connecting member is formed in an arc shape.

[0020] In some embodiments, in the second direction, the opening length of the drain port is greater than the length of the connecting member.

[0021] In some embodiments, the width W of the drain port is greater than 2 mm.

[0022] In some embodiments, the thickness of the connecting member is smaller than the thickness of the first microchannel flat tube and the second microchannel flat tube; and / or, the thickness of the connecting member is T1, the thickness of the first microchannel flat tube and the second microchannel flat tube is T2, and T1 / T2<0.5.

[0023] In some embodiments, the microchannel heat exchanger further includes a header connected to the ends of the first microchannel flat tube and the second microchannel flat tube, and in the second direction, the connector at the end abuts against the header.

[0024] In some embodiments, the first fin group and the second fin group are provided with insertion channels on their sides facing each other, the first microchannel flat tube or the second microchannel flat tube is located in the insertion channel, and a first guide surface is provided on the inlet side of the top wall of the insertion channel, and the first guide surface extends upward and outward at an angle.

[0025] The HVAC equipment according to the embodiment of the utility model includes the aforementioned microchannel heat exchanger.

[0026] According to the HVAC equipment of the embodiment of the utility model, the aforementioned microchannel heat exchanger is adopted to improve the working performance of the HVAC equipment and reduce the difficulty of assembling the HVAC equipment.

[0027] Additional aspects and advantages of the present invention will become apparent from the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 Schematic diagram of a microchannel heat exchanger according to some embodiments of the present invention.

[0030] Figure 2 This is a schematic diagram of the first microchannel flat tube and the second microchannel flat tube after being connected in some embodiments of the first aspect of the utility model.

[0031] Figure 3 It is a top view of a partial structure after the first microchannel flat tube and the second microchannel flat tube are connected in some embodiments of the first aspect of the utility model.

[0032] Figure 4 It is a side view of the first microchannel flat tube and the second microchannel flat tube after being connected in some embodiments of the first aspect of the utility model.

[0033] Figure 5 It is a side view of the first microchannel flat tube and the second microchannel flat tube after being connected in some embodiments of the second aspect of the utility model.

[0034] Figure 6 It is a side view of the first microchannel flat tube and the second microchannel flat tube after being connected in some embodiments of the third aspect of the utility model.

[0035] Figure 7 It is a side view of the first microchannel flat tube and the second microchannel flat tube after being connected in some embodiments of the fourth aspect of the utility model.

[0036] Figure 8 It is a top view of the partial structure after the first microchannel flat tube and the second microchannel flat tube are connected in some embodiments of the fifth aspect of the utility model.

[0037] Reference numerals:

[0038] 1000. Microchannel heat exchanger;

[0039] 100. a first microchannel flat tube;

[0040] 200, second microchannel flat tube;

[0041] 300, connecting assembly; 310, connecting piece;

[0042] 400, first fin group;

[0043] 500, second fin group;

[0044] 600, fins;

[0045] 700, drain outlet;

[0046] 800, first guide surface; 900, second guide surface. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] The microchannel heat exchanger 1000 of an embodiment of the present utility model is described below with reference to the accompanying drawings.

[0050] like Figure 1 As shown, a microchannel heat exchanger 1000 according to an embodiment of the present utility model includes: a first microchannel flat tube 100 , a second microchannel flat tube 200 , a connecting assembly 300 , a first fin group 400 and a second fin group 500 .

[0051] Among them, Figure 1 As shown in FIG. 1 , in the first direction, the first microchannel flat tube 100 and the second microchannel flat tube 200 are arranged at intervals. It should be noted that the first direction mentioned here can be understood as Figure 1 In the X direction shown in the figure, that is, in the X direction, the first microchannel flat tube 100 and the second microchannel flat tube 200 are arranged at an interval to avoid the first microchannel flat tube 100 and the second microchannel flat tube 200 from influencing each other during the heat exchange process, thereby ensuring the heat exchange quality of the first microchannel flat tube 100 and the second microchannel flat tube 200.

[0052] At the same time, by providing the first microchannel flat tube 100 and the second microchannel flat tube 200 , the first microchannel flat tube 100 and the second microchannel flat tube 200 can be used to cooperate in heat exchange, so as to improve the heat exchange performance of the microchannel heat exchanger 1000 .

[0053] In the description of the present utility model, features defined as “first” or “second” may explicitly or implicitly include one or more such features, and are used to distinguish and describe the features, without any distinction in order or importance.

[0054] Combination Figure 1-Figure 4 As shown, the connection assembly 300 is respectively connected to the first microchannel flat tube 100 and the second microchannel flat tube 200. That is to say, after the first microchannel flat tube 100 and the second microchannel flat tube 200 are arranged at intervals in the X direction, the first microchannel flat tube 100 and the second microchannel flat tube 200 are connected through the connection assembly 300, so that the first microchannel flat tube 100 and the second microchannel flat tube 200 arranged at intervals in the first direction can be formed into an integral part, so that during the assembly process of the microchannel heat exchanger 1000, the first microchannel flat tube 100 and the second microchannel flat tube 200 can be connected to the external structural parts (such as: the header below) at the same time, ensuring the assembly accuracy of the first microchannel flat tube 100 and the second microchannel flat tube 200 and the header, reducing the connection difficulty and improving the connection efficiency, thereby reducing the assembly difficulty of the microchannel heat exchanger 1000 and improving the assembly efficiency of the microchannel heat exchanger 1000.

[0055] like Figure 1 As shown, the first fin group 400 and the second fin group 500 are arranged in the first direction, each fin group includes a plurality of fins 600 arranged at intervals along the second direction, the first fin group 400 is installed to the first microchannel flat tube 100, and the second fin group 500 is installed to the second microchannel flat tube 200, and the first direction and the second direction are arranged perpendicularly. Here, it means that the first fin group 400 and the second fin group 500 both include a plurality of fins 600 arranged at intervals along the second direction, wherein the second direction can be understood as Figure 1 The Y direction shown in .

[0056] That is to say, the arrangement direction of the first fin group 400 and the second fin group 500 is consistent with the arrangement direction of the first microchannel flat tube 100 and the second microchannel flat tube 200, so that it is convenient to install the first fin group 400 to the first microchannel flat tube 100 and the second fin group 500 to the second microchannel flat tube 200, so that the first microchannel flat tube 100 and the second microchannel flat tube 200 are both provided with a plurality of fins 600 spaced along the second direction, and the fins 600 can play a role in heat transfer, thereby improving the heat exchange quality of the first microchannel flat tube 100 and the second microchannel flat tube 200, so as to ensure the heat exchange effect of the microchannel heat exchanger 1000 to a certain extent.

[0057] At the same time, by providing the first fin group 400 and the second fin group 500, the first microchannel flat tube 100 and the second microchannel flat tube 200 can correspond to the fin group one by one, that is, the first microchannel flat tube 100 and the second microchannel flat tube 200 can correspond to a group of fins separately, so that while ensuring the heat exchange quality of the first microchannel flat tube 100 and the second microchannel flat tube 200, the difficulty of assembling the first microchannel flat tube 100 and the second microchannel flat tube 200 with the fin group can be reduced, so as to further reduce the assembly difficulty of the microchannel heat exchanger 1000 and improve the assembly efficiency of the microchannel heat exchanger 1000.

[0058] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0059] As can be seen from the above structure, the microchannel heat exchanger 1000 of the embodiment of the utility model can improve the heat exchange performance of the microchannel heat exchanger 1000 by providing the first microchannel flat tube 100 and the second microchannel flat tube 200.

[0060] By providing the connection assembly 300, the first microchannel flat tube 100 and the second microchannel flat tube 200 can be connected via the connection assembly 300, so that the first microchannel flat tube 100 and the second microchannel flat tube 200 spaced apart in the first direction can be formed into an integral part, thereby reducing the difficulty of connecting the first microchannel flat tube 100 and the second microchannel flat tube 200 with the manifold, thereby improving the connection efficiency, that is, reducing the difficulty of assembling the microchannel heat exchanger 1000, improving the assembly efficiency of the microchannel heat exchanger 1000, and ensuring the assembly accuracy of the first microchannel flat tube 100 and the second microchannel flat tube 200 with the manifold to a certain extent.

[0061] By providing the first fin group 400 and the second fin group 500, and installing the first fin group 400 to the first microchannel flat tube 100 and installing the second fin group 500 to the second microchannel flat tube 200, while ensuring the heat exchange quality of the first microchannel flat tube 100 and the second microchannel flat tube 200, the difficulty of assembling the first microchannel flat tube 100 and the second microchannel flat tube 200 with the fin group can be reduced, so as to further reduce the assembly difficulty of the microchannel heat exchanger 1000 and improve the assembly efficiency of the microchannel heat exchanger 1000.

[0062] In summary, the microchannel heat exchanger 1000 of the present application is not only simple and convenient to assemble but also has good heat exchange performance.

[0063] It can be understood that, compared with the prior art, the present application not only sets two microchannel flat tubes (a first microchannel flat tube 100 and a second microchannel flat tube 200), but also sets separate fin groups (a first fin group 400 and a second fin group 500) on the microchannel flat tubes, and sets a connecting component 300 to connect the first microchannel flat tube 100 and the second microchannel flat tube 200. While improving the heat exchange performance of the microchannel heat exchanger 1000, it can also make the assembly of the microchannel heat exchanger 1000 simple and convenient, thereby improving the production efficiency of the microchannel heat exchanger 1000.

[0064] In some embodiments, the connecting component 300, the first microchannel flat tube 100 and the second microchannel flat tube 200 are manufactured by an integrated processing and molding process, so that the connecting component 300, the first microchannel flat tube 100 and the second microchannel flat tube 200 are formed into an integral part. In this way, the connection between the connecting component 300 and the first microchannel flat tube 100 and the second microchannel flat tube 200 can be eliminated, the molding efficiency can be improved, and the connection strength can be ensured, thereby ensuring the connection quality of the connecting component 300, making the relative position of the first microchannel flat tube 100 and the second microchannel flat tube 200 stable, thereby reducing the difficulty of assembling the first microchannel flat tube 100, the second microchannel flat tube 200 and the collecting pipe, and ensuring the assembly accuracy.

[0065] In some embodiments, the first fin group 400 is located on the windward side of the second fin group 500 , and the heat transfer coefficient of the second fin group 500 is greater than the heat transfer coefficient of the first fin group 400 . That is to say, in the air flow direction, the first fin group 400 is located on the windward side and the second fin group 500 is located on the leeward side. In this way, when the air flows through the microchannel heat exchanger 1000, the air will first flow through the first fin group 400. At this time, due to the large temperature difference between the air and the refrigerant in the microchannel flat tube, the first fin group 400 on the windward side can be effectively utilized for heat exchange with the microchannel flat tube. When the air flows through the leeward side, the air has already preliminarily exchanged heat with the first fin group 400 on the windward side, so that the temperature difference between the air and the refrigerant in the microchannel flat tube is small. Therefore, the heat transfer coefficient of the second fin group 500 is set to be greater than the heat transfer coefficient of the first fin group 400 to increase the heat exchange effect of the second fin group 500 located on the leeward side, so that the second fin group 500 can effectively realize the heat exchange between the air and the microchannel flat tube, thereby ensuring the heat exchange performance of the microchannel heat exchanger 1000.

[0066] In some embodiments, the number of fins 600 of the second fin group 500 is greater than the number of fins 600 of the first fin group 400. Thus, the heat transfer coefficient of the second fin group 500 is greater than the heat transfer coefficient of the first fin group 400, so as to increase the heat transfer effect of the second fin group 500 located on the leeward side, ensure that the second fin group 500 can effectively realize the heat exchange between the air and the microchannel flat tubes, and ensure the heat transfer performance of the microchannel heat exchanger 1000.

[0067] In other embodiments, the shape of the fins 600 of the first fin group 400 is different from the shape of the fins 600 of the second fin group 500. This is conducive to making the heat transfer coefficient of the second fin group 500 greater than the heat transfer coefficient of the first fin group 400 by changing the shape of the fins 600 of the second fin group 500, thereby increasing the heat transfer effect of the second fin group 500 located on the leeward side.

[0068] Optionally, the fins 600 of the first fin group 400 are corrugated sheets or flat sheets, and the fins 600 of the second fin group 500 are window sheets or bridge sheets, so that the heat transfer coefficient of the second fin group 500 is set to be greater than the heat transfer coefficient of the first fin group 400, so as to increase the heat transfer effect of the second fin group 500 located on the leeward side.

[0069] In some specific embodiments, the number of fins 600 of the second fin group 500 can be set to be greater than the number of fins 600 of the first fin group 400, and the shape of the fins 600 of the first fin group 400 and the shape of the fins 600 of the second fin group 500 can be set to be different to ensure that the heat transfer coefficient of the second fin group 500 is greater than the heat transfer coefficient of the first fin group 400.

[0070] In some embodiments, air channels are provided between adjacent fins 600 of each fin group. Here, air channels are provided between adjacent fins 600 of the first fin group 400, and air channels are also provided between adjacent fins 600 of the second fin group 500. The air channels are used to guide the flow of air so that the air can effectively pass through the fin group when passing through the fin group, thereby achieving heat exchange between the air and the fins 600, so as to ensure the heat exchange effect of the microchannel heat exchanger 1000.

[0071] In some embodiments, adjacent fins 600 of each fin group are spaced apart to form air channels between adjacent fins 600 of each fin group.

[0072] Optionally, at least a portion of the fins 600 of the second fin group 500 is provided with a spoiler (not shown in the figure), and a spoiler space connected to the air flow channel is provided between the spoiler and the corresponding fin 600, so as to achieve spoilering of the air flowing through the second fin group 500 and improve the heat exchange effect of the second fin group 500.

[0073] In some embodiments, the fins 600 of the second fin group 500 may be of window type or louver type, so that at least a portion of the fins 600 of the second fin group 500 are configured to have a spoiler, and a spoiler space connected to the air flow channel is provided between the spoiler and the corresponding fin 600, thereby improving the heat exchange effect of the second fin group 500.

[0074] In some embodiments, Figure 5 As shown, the first microchannel flat tube 100 and the second microchannel flat tube 200 are arranged at intervals in the height direction. The height direction mentioned here can be understood as Figure 5 The Z direction shown in Figure 1 As shown in the up and down directions, by arranging the first microchannel flat tube 100 and the second microchannel flat tube 200 at intervals in the height direction, when the air flows along the X direction, it can be ensured to a certain extent that the temperature difference between the air flowing through the first microchannel flat tube 100 and the second microchannel flat tube 200 and the refrigerant in the microchannel flat tube is large, which is beneficial to the heat transfer of the second fin group 500 on the leeward side, thereby improving the heat exchange effect of the first microchannel flat tube 100 and the second microchannel flat tube 200.

[0075] In some embodiments, the first microchannel flat tube 100 is located on the windward side of the second microchannel flat tube 200, and the heat exchange area of ​​the first microchannel flat tube 100 is greater than the heat exchange area of ​​the second microchannel flat tube 200. In other words, the heat exchange area of ​​the first microchannel flat tube 100 located on the windward side is greater than the heat exchange area of ​​the second microchannel flat tube 200 located on the leeward side, thereby improving the heat exchange effect of the first microchannel flat tube 100, thereby ensuring the heat exchange effect of the microchannel heat exchanger 1000.

[0076] In some embodiments, the width of the first microchannel flat tube 100 is greater than the width of the second microchannel flat tube 200; and / or, the thickness of the first microchannel flat tube 100 is greater than the thickness of the second microchannel flat tube 200, so that the heat exchange area of ​​the first microchannel flat tube 100 is greater than the heat exchange area of ​​the second microchannel flat tube 200, thereby improving the heat exchange effect of the first microchannel flat tube 100.

[0077] Among them, the width of the first microchannel flat tube 100 and the width of the second microchannel flat tube 200 mentioned here refer to the dimensions of the first microchannel flat tube 100 and the second microchannel flat tube 200 extending along the X direction, and the thickness of the first microchannel flat tube 100 and the thickness of the second microchannel flat tube 200 refer to the dimensions of the first microchannel flat tube 100 and the second microchannel flat tube 200 extending along the Z direction.

[0078] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3As shown, the connection assembly 300 includes a plurality of connectors 310, and the plurality of connectors 310 are connected between the first microchannel flat tube 100 and the second microchannel flat tube 200 at intervals in the second direction, and a drainage port 700 is formed between two adjacent connectors 310. In this way, while realizing the connection of the first microchannel flat tube 100 and the second microchannel flat tube 200 into an integral part, it is also convenient to drain water, so as to improve the drainage rate of the microchannel heat exchanger 1000, thereby avoiding frost on the microchannel heat exchanger 1000 in low temperature conditions to a certain extent, and ensuring the working performance of the microchannel heat exchanger 1000.

[0079] In summary, the microchannel heat exchanger 1000 of the present application can solve the technical problems in the prior art that the drainage rate of the microchannel flat tube is insufficient, the assembly accuracy of the microchannel heat exchanger 1000 is difficult to ensure, the production efficiency is low, and the heat exchange effect of the microchannel heat exchanger 1000 is poor.

[0080] In some embodiments, Figure 1 As shown, the first fin group 400 and the second fin group 500 are arranged at intervals in the first direction to form a drainage channel between the first fin group 400 and the second fin group 500 to facilitate drainage and further improve the drainage rate of the microchannel heat exchanger 1000.

[0081] In some embodiments, in the second direction, at least one end of at least a portion of the connectors 310 is provided with a water guide surface extending downward (not shown in the example figure), so that the condensed water on the connectors 310 can be discharged along the second direction through the water guide surface to further increase the drainage rate.

[0082] Optionally, at least a portion of the connecting members 310 are provided with water guiding surfaces extending downward at both opposite ends in the second direction, so that water on the connecting members 310 can be discharged simultaneously along the second direction, thereby maximizing the drainage rate.

[0083] In some embodiments, Figure 6As shown, the bottom of the connector 310 is flush with the bottom of the first microchannel flat tube 100 and / or the bottom of the second microchannel flat tube 200. This means that the bottom of the connector 310 is flush with the bottom of the first microchannel flat tube 100; or, the bottom of the connector 310 is flush with the bottom of the second microchannel flat tube 200; or, the bottom of the connector 310 is flush with the bottom of the first microchannel flat tube 100 and the second microchannel flat tube 200 at the same time, so that when the first fin group 400 is installed on the first microchannel flat tube 100 and the second fin group 500 is installed on the second microchannel flat tube 200, it can be ensured that the connector 310 can contact the fin 600 provided on the first microchannel flat tube 100 and / or the fin 600 provided on the second microchannel flat tube 200, so that the condensed water on the connector 310 can flow and be discharged along the extension direction of the fin 600, which is conducive to drainage and improves the drainage rate.

[0084] In some embodiments, Figure 7 As shown, a portion of the connector 310 protrudes toward the bottom of the first microchannel flat tube 100 and / or the second microchannel flat tube 200. In this way, the condensed water on the connector 310 can flow to the middle of the connector 310 along the extension direction of the connector 310 and accumulate in the middle of the connector 310 and then be discharged, which is conducive to drainage and improves the drainage rate.

[0085] In some embodiments, Figure 7 As shown, the connecting member 310 is formed in an arc shape. In this way, a part of the connecting member 310 can be arranged to protrude toward the bottom of the first microchannel flat tube 100 and / or the second microchannel flat tube 200 to facilitate drainage and increase the drainage rate.

[0086] In some embodiments, Figure 3 As shown, in the second direction, the opening length of the drain port 700 is greater than the length of the connector 310. This increases the drainage area of ​​the drain port 700, improves the drainage rate, and helps reduce the extension length of the connector 310. This reduces the weight of the microchannel heat exchanger 1000 and saves the manufacturing cost of the microchannel heat exchanger 1000.

[0087] The opening length of the drain outlet 700 mentioned here can be understood as Figure 3 As shown in FIG. 1 , the length of the connecting member 310 can be understood as Figure 3 L2 shown in .

[0088] In some embodiments, Figure 3 As shown, the width W of the drain port 700 is greater than 2 mm, so as to ensure the drainage area of ​​the drain port 700 and further improve the drainage rate.

[0089] In a specific example, the width of the drain port 700 is 3 mm, 4 mm, 5 mm, or 6 mm.

[0090] In some embodiments, the thickness of the connector 310 is less than the thickness of the first microchannel flat tube 100 and the second microchannel flat tube 200. The thickness of the connector 310 mentioned here can be understood as Figure 4 As shown in T1, the thickness of the first microchannel flat tube 100 and the thickness of the second microchannel flat tube 200 can be understood as Figure 4 T2 shown in the figure, by setting the thickness of the connecting member 310 to be smaller than the thickness of the first microchannel flat tube 100 and the second microchannel flat tube 200, can reduce the weight of the connecting member 310 and reduce the manufacturing cost. At the same time, it is beneficial to punch a hole on the connecting member 310 to form the drain outlet 700, thereby reducing the difficulty of forming the drain outlet 700, thereby ensuring the drainage effect.

[0091] Alternatively, if Figure 4 As shown, the thickness of the connector 310 is T1, the thickness of the first microchannel flat tube 100 and the second microchannel flat tube 200 is T2, and T1 / T2<0.5. The thickness of the connector 310 is smaller than the thickness of the first microchannel flat tube 100 and the second microchannel flat tube 200, so as to reduce the weight of the connector 310, reduce the manufacturing cost, and reduce the difficulty of forming the drain port 700.

[0092] In some embodiments, the microchannel heat exchanger 1000 further includes a header (not shown in the figure), which is connected to the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200. In the second direction, the connector 310 located at the end abuts against the header. The header is provided so that the refrigerant can be transported toward the first microchannel flat tube 100 and the second microchannel flat tube 200 through the header, thereby ensuring the heat exchange performance of the first microchannel flat tube 100 and the second microchannel flat tube 200.

[0093] At the same time, by abutting the connecting piece 310 located at the end in the second direction against the collecting pipe, the positions of the first microchannel flat tube 100 and the second microchannel flat tube 200 can be limited during the assembly process of the first microchannel flat tube 100 and the second microchannel flat tube 200 and the collecting pipe, thereby reducing the difficulty of assembling the first microchannel flat tube 100, the second microchannel flat tube 200 and the collecting pipe and ensuring the position accuracy after assembly.

[0094] In some embodiments, Figure 8As shown, in the second direction, the distance between the connector 310 at the end and the top of the first microchannel flat tube 100 and / or the second microchannel flat tube 200 is d, wherein 3mm<d<10mm. The connector 310 at the end is spaced from the top of the first microchannel flat tube 100 and / or the second microchannel flat tube 200, so that the connector 310 at the end is conveniently used to limit the installation position of the first microchannel flat tube 100 and the second microchannel flat tube 200 and the manifold, thereby reducing the difficulty of assembling the first microchannel flat tube 100, the second microchannel flat tube 200 and the manifold, and ensuring the position accuracy after assembly.

[0095] In some embodiments, the distance between the connector 310 at the end and the top of the first microchannel flat tube 100 and / or the second microchannel flat tube 200 is 4mm, 5mm, 6mm, 7mm, 8mm or 9mm, etc. In this way, while the connector 310 is used to limit the installation position of the first microchannel flat tube 100 and the second microchannel flat tube 200 and the header, the contact area between the first microchannel flat tube 100 and the second microchannel flat tube 200 and the header can be ensured, thereby improving the connection strength.

[0096] In some embodiments, Figure 8 As shown, the width of the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200 in the second direction is smaller than the width of the first microchannel flat tube 100 and the second microchannel flat tube 200 at other positions, so as to achieve shrinkage treatment on the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200, so as to facilitate the assembly of the first microchannel flat tube 100, the second microchannel flat tube 200 and the collecting pipe, thereby reducing the difficulty of assembling the first microchannel flat tube 100, the second microchannel flat tube 200 and the collecting pipe.

[0097] In some embodiments, Figure 8 As shown, the width of the end of the first microchannel flat tube 100 in the second direction is W1a, and the width of the end of the second microchannel flat tube 200 in the second direction is W1b, W1a+W1b<2W1. Wherein, W1 is the width of the first microchannel flat tube 100 and the second microchannel flat tube 200 at other positions, so as to achieve shrinkage treatment on the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200, and reduce the difficulty of assembling the first microchannel flat tube 100, the second microchannel flat tube 200 and the manifold.

[0098] Optionally, W1<W1a+W1b. In this way, while performing the shrinking treatment on the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200, the width of the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200 can be ensured to ensure the heat exchange area of ​​the first microchannel flat tube 100 and the second microchannel flat tube 200 and improve the heat exchange quality.

[0099] In some embodiments, Figure 1 As shown, the first fin group 400 and the second fin group 500 are provided with an insertion channel on their sides facing each other, the first microchannel flat tube 100 or the second microchannel flat tube 200 is located in the insertion channel, and the inlet side of the top wall of the insertion channel is provided with a first guide surface 800, and the first guide surface 800 extends upward and outwardly. In this way, the size of the inlet opening of the insertion channel can be gradually increased, and while the first fin group 400 is installed on the first microchannel flat tube 100 and the second fin group 500 is installed on the second microchannel flat tube 200, the installation difficulty of the first fin group 400 and the first microchannel flat tube 100 and the installation difficulty of the second fin group 500 and the second microchannel flat tube 200 can be reduced.

[0100] In a specific example, the first microchannel flat tube 100 is located in the insertion channel of the first fin group 400, and the second microchannel flat tube 200 is located in the insertion channel of the second fin group 500, so as to achieve the installation of the first fin group 400 to the first microchannel flat tube 100 and the installation of the second fin group 500 to the second microchannel flat tube 200.

[0101] It should be noted that the upward and outward inclined extension mentioned above can be understood as that in the extension direction of the insertion channel, the first guide surface 800 on the first fin group 400 extends obliquely toward the inner direction of the insertion channel away from the first fin group 400, and the first guide surface 800 on the second fin group 500 extends obliquely toward the inner direction of the insertion channel away from the second fin group 500, thereby increasing the opening area on the inlet side of the insertion channel, reducing the difficulty of installing the first fin group 400 and the first microchannel flat tube 100 and reducing the difficulty of installing the second fin group 500 and the second microchannel flat tube 200, thereby facilitating installation.

[0102] In some embodiments, Figure 1 As shown, a second guide surface 900 is provided on the inlet side of the bottom wall of the insertion channel, and the second guide surface 900 extends obliquely downward and outward, that is, in the extension direction of the insertion channel, the second guide surface 900 on the first fin group 400 extends obliquely toward the inner direction of the insertion channel away from the first fin group 400, and the second guide surface 900 on the second fin group 500 extends obliquely toward the inner direction of the insertion channel away from the second fin group 500. In this way, while increasing the opening area on the inlet side of the insertion channel, the second guide surface 900 can also be used to guide the condensed water to flow between the first fin group 400 and the second fin group 500 to facilitate drainage and improve the drainage rate.

[0103] In some embodiments, Figure 1As shown, the first guide surface 800 and the second guide surface 900 of the same insertion channel extend obliquely in a direction away from each other, so as to increase the opening area of ​​the inlet side of the insertion channel.

[0104] Alternatively, if Figure 1 As shown, in the first direction, the extension length of the insertion channel is less than the extension length of the fin 600, which can avoid the insertion channel penetrating the fin 600 in the first direction, reduce the difficulty of installing the fin 600 and the first microchannel flat tube 100 and the second microchannel flat tube 200, and at the same time ensure the structural strength of the fin 600.

[0105] In some embodiments, the first fin set 400 and the second fin set 500 are respectively installed on the first microchannel flat tube 100 and the second microchannel flat tube 200 in a plug-in manner to reduce the difficulty of assembling the first fin set 400 and the second fin set 500 .

[0106] The microchannel heat exchanger 1000 of the present application will be described in detail below with reference to the accompanying drawings.

[0107] like Figure 1 As shown, the microchannel heat exchanger 1000 includes: a first microchannel flat tube 100, a second microchannel flat tube 200, a connecting assembly 300, a first fin group 400, a second fin group 500 and a header (not shown in the figure).

[0108] Among them, Figure 1 As shown, in the first direction, the first microchannel flat tube 100 and the second microchannel flat tube 200 are arranged at intervals, the first microchannel flat tube 100 is located on the windward side of the second microchannel flat tube 200, the heat exchange area of ​​the first microchannel flat tube 100 is larger than the heat exchange area of ​​the second microchannel flat tube 200, and the collecting pipe is connected to the ends of the first microchannel flat tube 100 and the second microchannel flat tube 200.

[0109] Combination Figure 2 and Figure 4 As shown, the connection assembly 300 includes a plurality of connectors 310, and the plurality of connectors 310 are connected between the first microchannel flat tube 100 and the second microchannel flat tube 200 at intervals in the second direction, and a drain port 700 is formed between two adjacent connectors 310. The thickness of the connector 310 is T1, and the thickness of the first microchannel flat tube 100 and the second microchannel flat tube 200 is T2, and T1 / T2 is less than 0.5, so that the thickness of the connector 310 is less than the thickness of the first microchannel flat tube 100 and the second microchannel flat tube 200. In the second direction, the connector 310 at the end is abutted against the collecting pipe.

[0110] like Figure 3As shown, in the second direction, the opening length of the drain outlet 700 is greater than the length of the connecting member 310, and the width W of the drain outlet 700 is greater than 2 mm.

[0111] In the second direction, at least one end of at least a portion of the connecting members 310 is provided with a water-guiding surface extending downward; or Figure 6 As shown, the bottom of the connecting member 310 is flush with the bottom of the first microchannel flat tube 100 and the bottom of the second microchannel flat tube 200; or Figure 7 As shown, a portion of the connecting member 310 protrudes toward the bottom of the first microchannel flat tube 100 and the second microchannel flat tube 200, so that the connecting member 310 is formed into an arc shape.

[0112] The first fin group 400 and the second fin group 500 are arranged in the first direction, the first fin group 400 is located on the windward side of the second fin group 500, each fin group includes a plurality of fins 600 arranged at intervals along the second direction, an air flow channel is provided between adjacent fins 600 of each fin group, at least a part of the fins 600 of the second fin group 500 is provided with a spoiler, and a spoiler space connected to the air flow channel is provided between the spoiler and the corresponding fins 600, so that the shape of the fins 600 of the first fin group 400 is different from the shape of the fins 600 of the second fin group 500, so that the heat transfer coefficient of the second fin group 500 is greater than the heat transfer coefficient of the first fin group 400.

[0113] like Figure 1 As shown, the sides of the first fin group 400 and the second fin group 500 facing each other are provided with insertion channels, the first fin group 400 is installed to the first microchannel flat tube 100 through the insertion channel on the first fin group 400, and the second fin group 500 is installed to the second microchannel flat tube 200 through the insertion channel on the second fin group 500, and the inlet side of the top wall of the insertion channel is provided with a first guide surface 800, and the first guide surface 800 extends upward and outward at an angle.

[0114] The HVAC equipment of the embodiment of the utility model is described below.

[0115] A HVAC device according to an embodiment of the utility model includes: a microchannel heat exchanger 1000 .

[0116] The microchannel heat exchanger 1000 is the aforementioned microchannel heat exchanger 1000 , and the specific structure of the microchannel heat exchanger 1000 is not described in detail herein.

[0117] It can be seen from the above structure that the HVAC equipment of the embodiment of the utility model adopts the aforementioned microchannel heat exchanger 1000 to improve the working performance of the HVAC equipment and reduce the difficulty of assembling the HVAC equipment.

[0118] It should be noted that HVAC equipment, namely air conditioners, is a unit used to provide air temperature processing for a space area (generally closed). The function of the HVAC equipment is to produce cold air or hot air through the microchannel heat exchanger 1000 to adjust the temperature, humidity, cleanliness and air flow rate of the air in the room (or closed space, area) to meet the requirements of human comfort or process. The HVAC equipment is provided with an indoor air conditioner and an outdoor air conditioner. The indoor air conditioner is arranged indoors and can deliver cold air or hot air to the room. The outdoor air conditioner is arranged outdoors. When the HVAC equipment is heating, the outdoor air conditioner can be used as an evaporator, and when the HVAC equipment is cooling, the outdoor unit can be used as a condenser.

[0119] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0120] The microchannel heat exchanger 1000 according to the embodiment of the utility model and other structures of the HVAC equipment having the same are known to those skilled in the art and will not be described in detail here.

[0121] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0122] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A microchannel heat exchanger, characterized in that: include: A first microchannel flat tube and a second microchannel flat tube, in a first direction, the first microchannel flat tube and the second microchannel flat tube are arranged at intervals; A connecting assembly, wherein the connecting assembly is connected to the first microchannel flat tube and the second microchannel flat tube respectively; A first fin group and a second fin group, the first fin group and the second fin group are arranged in the first direction, each fin group includes a plurality of fins arranged at intervals along the second direction, the first fin group is installed to the first microchannel flat tube, the second fin group is installed to the second microchannel flat tube, and the first direction and the second direction are arranged perpendicularly.

2. The microchannel heat exchanger according to claim 1, characterized in that: The first fin group is located on the windward side of the second fin group, and the heat transfer coefficient of the second fin group is greater than the heat transfer coefficient of the first fin group.

3. The microchannel heat exchanger according to claim 2, characterized in that: The number of fins in the second fin group is greater than the number of fins in the first fin group; And / or, the shape of the fins of the first fin group is different from the shape of the fins of the second fin group.

4. The microchannel heat exchanger according to claim 3, characterized in that: An air flow channel is provided between adjacent fins of each fin group; At least a part of the fins of the second fin group is provided with a spoiler, and a spoiler space communicating with the air flow channel is provided between the spoiler and the corresponding fin.

5. The microchannel heat exchanger according to claim 1, characterized in that: The first microchannel flat tube and the second microchannel flat tube are spaced apart in the height direction.

6. The microchannel heat exchanger according to claim 1, characterized in that: The first microchannel flat tube is located on the windward side of the second microchannel flat tube, and the heat exchange area of ​​the first microchannel flat tube is larger than the heat exchange area of ​​the second microchannel flat tube.

7. The microchannel heat exchanger according to any one of claims 1 to 6, characterized in that: The connection assembly includes a plurality of connection members, and the plurality of connection members are connected between the first microchannel flat tube and the second microchannel flat tube at intervals in the second direction, and a drainage port is formed between two adjacent connection members.

8. The microchannel heat exchanger according to claim 7, characterized in that: In the second direction, at least one end of at least a portion of the connecting members is provided with a water guiding surface extending downward.

9. The microchannel heat exchanger according to claim 7, characterized in that: The bottom of the connecting piece is flush with the bottom of the first microchannel flat tube and / or the second microchannel flat tube.

10. The microchannel heat exchanger according to claim 7, characterized in that: A portion of the connecting member protrudes toward the bottom of the first microchannel flat tube and / or the second microchannel flat tube.

11. The microchannel heat exchanger according to claim 10, characterized in that: The connecting piece is formed in an arc shape.

12. The microchannel heat exchanger according to claim 7, characterized in that: In the second direction, the opening length of the drain port is greater than the length of the connecting member.

13. The microchannel heat exchanger according to claim 7, characterized in that: The width W of the drain outlet is >2 mm.

14. The microchannel heat exchanger according to claim 7, characterized in that: The thickness of the connecting member is smaller than the thickness of the first microchannel flat tube and the second microchannel flat tube; And / or, the thickness of the connecting member is T1, the thickness of the first microchannel flat tube and the second microchannel flat tube is T2, and T1 / T2<0.

5.

15. The microchannel heat exchanger according to claim 7, characterized in that: It also includes a collecting pipe, which is connected to the ends of the first microchannel flat tube and the second microchannel flat tube. In the second direction, the connecting piece located at the end abuts against the collecting pipe.

16. The microchannel heat exchanger according to claim 7, characterized in that: The first fin group and the second fin group are provided with insertion channels on their sides facing each other, the first microchannel flat tube or the second microchannel flat tube is located in the insertion channel, and a first guide surface is provided on the inlet side of the top wall of the insertion channel, and the first guide surface extends upward and outward at an angle.

17. A HVAC equipment, characterized in that: It comprises the microchannel heat exchanger according to any one of claims 1-16.

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