Electric control box assembly and heating and ventilation system

Abstract

The invention discloses an electric control box assembly and a heating and ventilation system, and relates to the technical field of heating and ventilation, and the electric control box assembly comprises an electric control box, an electric control board and a heat dissipation piece; the electric control box comprises a box body and a box cover, the box body comprises a main body part and a protruding part extending outwards from the main body part, the box cover is connected with the main body part in a covering mode, an installation cavity is defined by the box cover and the main body part, and a containing groove communicated with the installation cavity is formed in the protruding part; the electric control board comprises a substrate and a plurality of electronic elements mounted on the substrate, the substrate is fixed in the mounting cavity, and at least one part of the plurality of electronic elements extends into the accommodating groove; the heat dissipation piece is fixed to the box body and located on the outer side of the box body, and the heat dissipation piece is used for dissipating heat transmitted by the box body outwards. According to the technical scheme, the protruding part is arranged on the box body, the electronic element is matched with the containing groove formed in the protruding part, the heat exchange contact area of the electronic element in the heat dissipation process is increased, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, ventilation and air conditioning (HVAC), and particularly to an electric control box assembly and an HVAC system. Background Art

[0002] In an HVAC system, the electric control box assembly is used to supply power and control the operation of various electrical components in the HVAC system. Its importance is self-evident. The main electronic components in the electric control box assembly, such as inductors, capacitors, and power modules, will generate heat during operation. If the heat generated by the electronic components is not discharged in time, it is easy to cause the electronic components to overheat. When the electronic components are in a high-temperature operating environment for a long time, it is easy to cause the electronic components to age, shorten their service life, reduce their operating stability, affect the operation of the whole machine, and even cause a fire in the case of too high temperature. Summary of the Invention

[0003] The main object of the present invention is to provide an electric control box assembly and an HVAC system, which can increase the heat exchange contact area of the electronic components during the heat dissipation process and improve the heat dissipation efficiency.

[0004] To achieve the above object, the electric control box assembly proposed by the present invention includes an electric control box, an electric control board, and a heat dissipation member; the electric control box includes a box body and a box cover. The box body includes a main body portion and a protruding portion extending outward from the main body portion. The box cover is detachably connected to the main body portion and encloses an installation cavity with the main body portion. A receiving groove communicating with the installation cavity is formed in the protruding portion; the electric control board includes a substrate and a plurality of electronic components mounted on the substrate. The substrate is fixed in the installation cavity, and at least a part of the plurality of electronic components extends into the receiving groove; the heat dissipation member is fixed to the box body and is located outside the box body, and the heat dissipation member is used to dissipate the heat transferred from the box body to the outside.

[0005] In some embodiments, a heat conducting body is further included; the heat conducting body is filled between the outer wall of the electronic component and the wall of the receiving groove.

[0006] In some embodiments, the heat conducting body is heat conducting silicone.

[0007] In some embodiments, a heat conducting plate is further included; one side of the heat conducting plate is fixedly connected to the substrate, and the other side abuts against the inner wall surface of the main body portion.

[0008] In some embodiments, a heat conducting silicone grease layer is further included; the heat conducting silicone grease layer is bonded between the substrate and the heat conducting plate.

[0009] In some embodiments, the main body portion is further provided with a concave portion extending into the receiving cavity, and the side of the heat conducting plate facing away from the substrate abuts against the inner wall surface of the concave portion.

[0010] In some of these embodiments, a receiving groove with an opening communicating with the outside is formed in the concave portion. The heat dissipation member includes a first heat dissipation portion and a second heat dissipation portion. The first heat dissipation portion contacts the outer wall surface of the protruding portion, and the second heat dissipation portion is embedded in the receiving groove.

[0011] In some of these embodiments, the heat dissipation member is a microchannel heat exchanger and includes a header pipe and a flat heat exchange pipe that are connected and communicate with each other. The flat heat exchange pipe is provided with the first heat dissipation portion and the second heat dissipation portion.

[0012] In some of these embodiments, a sealing groove surrounding the peripheral edge of the box cover is provided between the box cover and the main body portion. A sealing ring is provided in the sealing groove, and opposite sides of the sealing ring are respectively in sealing contact with the box cover and the main body portion.

[0013] In some of these embodiments, the substrate is detachably connected to the main body portion.

[0014] This application also provides a heating, ventilation, and air conditioning (HVAC) system, including an equipment main body and the above-mentioned electronic control box assembly connected to the equipment main body.

[0015] Based on the electronic control box assembly of the embodiments of this application, the electronic control board includes a substrate and a plurality of electronic components mounted on the substrate. The electronic control board is fixed in the installation cavity of the electronic control box through the substrate, ensuring that the electronic components do not come into contact with the outside, thereby avoiding damage to the electronic components caused by external floating dust and water stains. An outwardly extending protruding portion is formed on the box body of the electronic control box, and a receiving cavity communicating with the installation cavity is further formed in the protruding portion. At least a part of the plurality of electronic components extends into the receiving cavity. By setting it like this, since the protruding portion has a relatively large contact area with the external space of the electronic control box, the heat generated by the electronic components in the receiving cavity can be more efficiently exchanged with the external air and dissipated by the protruding portion. In addition, the form of arranging the electronic components in the receiving cavity enables the box body to achieve a stronger surrounding effect on the position where the electronic components are located, and makes the distance between the electronic components and the inner wall of the box body closer, and the area opposite to the inner wall of the box body larger. Thus, to a certain extent, the heat conduction efficiency between the electronic components and the inner wall of the box body is improved, thereby enhancing the heat dissipation effect. And when installing the electronic control board, the setting of the receiving cavity can also quickly position the electronic components, avoiding misinstallation, thereby improving the assembly efficiency. In addition, this application also further improves the heat dissipation efficiency of the electronic control box by fixing a heat dissipation member outside the box body. Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of an embodiment of an electric control box assembly of the present invention;

[0018] Figure 2 for Figure 1 An exploded view of the electric control box assembly shown in FIG.

[0019] Figure 3 for Figure 1 A cross-sectional view of the electric control box assembly shown in FIG.

[0020] Figure 4 for Figure 1 A schematic diagram of the electric control box structure of the electric control box assembly shown in FIG.

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the electric control board of the electric control box assembly shown in FIG.

[0022] Figure 6 for Figure 1 An exploded view of the heat sink of the electric control box assembly is shown in FIG.

[0023] Description of Figure Numbers:

[0024] 1. Electric control box assembly 10. Electric control box; 11. Box body; 111. Main body; 112. Protrusion; 113. Accommodation groove; 114. Inner recess; 115. Inner recess; 12. Box cover; 13. Installation cavity; 20. Electric control board; 21. Base plate; 22. Electronic component; 30. Heat sink; 31. Collector; 311. First collector port; 312. Second collector port; 32. Heat exchange flat tube; 321. Microchannel; 33. First heat dissipation part; 34. Second heat dissipation part; 341. First extension part; 342. Second extension part; 40. Heat conductor; 50. Heat conduction plate; 51. Thermal grease layer; 60. Sealing groove; 61. Sealing ring; 70. Junction box; 71. Junction box cover; 72. Wiring harness.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0027] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0028] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] In a heating, ventilation, and air conditioning (HVAC) system, the electronic control box assembly is used to supply power and control the operation of each electrical component in the HVAC system. Its importance is self-evident. The main electronic components in the electronic control box assembly, such as inductors, capacitors, and power modules, generate heat during operation. If the heat generated by the electronic components is not discharged in time, it is easy to cause the electronic components to overheat. When the relatively hot air around the electronic components encounters the surface of an object with a relatively low temperature, condensation will occur. As the condensation gradually increases, it will damage the electronic control box assembly. At the same time, the electronic components being in a high-temperature operating environment for a long time is likely to cause the electronic components to age, shorten their service life, and reduce their operating stability, affecting the operation of the entire machine. Even, when the temperature is too high, it may even cause a fire.

[0031] To solve the above problems, the present invention proposes an electronic control box assembly 1, including an electronic control box 10, an electronic control board 20, and a heat dissipation member 30.

[0032] Please refer to Figures 1 to 3The electric control box 10 is integrated with a power supply system and a control system for supplying power and controlling the operation of various electrical components in the HVAC system. It is also convenient for centralized setting and maintenance of the circuits, circuit boards and control components in the electric control box 10. In order to protect the various components inside the electric control box 10, the electric control box 10 is made of aluminum alloy, which has high strength, low density, good hardness, good plasticity, excellent explosion-proof performance and low cost. Of course, the electric control box 10 can also be made of stainless steel, engineering plastics and other materials.

[0033] In one embodiment of the present invention, the electric control box 10 includes a box body 11 and a box cover 12. The box body 11 may be rectangular or in other shapes. For example, the box body 11 may be cylindrical or shaped. When the outer portion of the electric control box 10 is a regular structure, it is convenient for the electric control box 10 to be fitted with the mounting surface of the device, which is fast and stable. When the outer portion of the electric control box 10 is an irregular structure, it is convenient for the electric control box 10 to be installed in a device with a more complex internal structure, which is more compatible. In addition, when assembling the electric control box 10, any suitable surface may be selected to fix the electric control box 10, and the fixing method includes but is not limited to screw connection, clamping connection, and the like.

[0034] The electric control box 10 of the embodiment of the present invention can be a sealed electric control box 10, which can prevent water droplets, dust and other foreign matter from entering the electric control box 10 and causing damage to the electronic components 22 installed inside the electric control box 10, thereby achieving the effects of waterproof, dustproof and corrosion-resistant. The material of the electric control box 10 can be metal or alloy material, for example, aluminum, aluminum alloy and other materials with high strength, good thermal conductivity and low cost.

[0035] Please refer to Figure 4 The box body 11 of the electric control box 10 includes a main body 111 and a protrusion 112 extending outward from the main body 111. The protrusion 112 extending outward may be in the shape of a boss in the form of a cuboid, a cube, a cylinder, etc. Figure 4 As shown in the example, the protrusion 112 is long, and in order to make the structure of the electric control box 10 more compact, the length extension direction of the protrusion 112 can be consistent with the length extension direction of the main body 111, and the length of the protrusion 112 is less than or equal to the length of the main body 111. Further, the main body 111 and the protrusion 112 of the present application can be an integrated structure, which can save manufacturing processes and installation steps, facilitate processing and molding, and at the same time ensure the overall strength of the box body 11 and the sealing of the electric control box 10.

[0036] The lid 12 is lid-connected to the main body 111 and encloses with the main body 111 to form an installation cavity 13. A receiving groove 113 communicating with the installation cavity 13 is formed in the protruding portion 112. An inwardly concave portion 114 extending into the installation cavity 13 is further provided on the main body 111, and a receiving groove 115 with an opening communicating with the outside is formed in the inwardly concave portion 114. It can be understood that since the protruding portion 112 and the inwardly concave portion 114 have multiple surfaces in contact with the outside, compared with the form that the two positions of the protruding portion 112 and the inwardly concave portion 114 of the box body 11 are a plane, the contact area between them and the external space of the electric control box 10 is relatively large, that is, the heat exchange area between the electric control box 10 and the outside is increased, so as to improve the heat dissipation efficiency.

[0037] Further, the electric control board 20 includes a substrate 21 and a plurality of electronic components 22 mounted on the substrate 21. The substrate 21 is fixed in the installation cavity 13, and at least a part of the plurality of electronic components 22 extends into the receiving groove 113. The electronic component 22 includes an IPM (Intelligent Power Module), that is, an intelligent power module, which is an advanced hybrid integrated power device integrating functions such as logic, control, detection, and protection, and is one of the main electronic components 22 in the electric control box assembly 1. The electronic component 22 also includes regular electronic components such as capacitors and inductors, which will generate heat during operation. The electronic components 22 extending into the receiving groove 113 in this application mainly refer to these electronic components 22 that will generate heat during operation. And it can be that a part of these heat-generating electronic components 22 extends into the receiving groove 113. It can be understood that we can extend these electronic components 22 that generate relatively more heat into the receiving groove 113.

[0038] Since the protruding portion 112 has a relatively large contact area with the external space of the electric control box 10, the heat generated by the electronic components 22 in the receiving groove 113 can be more efficiently exchanged with the external air and dissipated by the protruding portion 112. In addition, the form of arranging the electronic components 22 in the receiving groove 113 enables the box body 11 to achieve a stronger surrounding effect on the position where the electronic components 22 are located, and makes the distance between the electronic components 22 and the inner wall of the box body 11 closer, and the area opposite to the inner wall of the box body 11 larger. Therefore, the heat conduction efficiency from the electronic components 22 to the inner wall of the box body 11 is also improved to a certain extent, thereby enhancing the heat dissipation effect.

[0039] Specifically, the accommodating groove 113 can be formed with corresponding groove inner walls in accordance with the external shape of the electronic component 22, so as to expand the relative area between the inner wall of the accommodating groove 113 and the electronic component 22, and further improve the heat exchange efficiency. For example, when the number of electronic components 122 is large, the accommodating groove 113 in the present application can be set as a plurality of sub-grooves corresponding to the number of electronic components 122. One electronic component 122 is arranged in one sub-groove, and the opening shape of each sub-groove is adapted to the outer contour of its corresponding electronic component 122. In this way, the accommodating groove 113 can also provide one-to-one protection for the electronic components 22, avoiding interference between the electronic components 22 during operation and multiple chain reactions when the electronic components 22 are damaged, and can also quickly position the electronic components 22 during installation to avoid misinstallation. Of course, in the present application, two or three electronic components 122 can also be placed in one sub-groove at the same time, and the number of electronic components 122 in different sub-grooves can be the same or different. Of course, the inner shape of the accommodating groove 113 does not have to be completely in accordance with the external structure of the electronic component 22, as long as there is a space for the electronic component 22 to extend into the accommodating groove 113.

[0040] In order to reliably transfer the heat generated by the electronic components 22 such as capacitors and inductors on the substrate 21 to the box body 11 and then to the outside world during operation, the substrate 21 needs to be fixed on the box body 11. In one embodiment, the substrate 21 is detachably connected to the main body portion 111. With this arrangement, when maintenance is required and the box cover 12 is opened, the circuit board 20 is still positioned on the box body 11, and the box body 11 is generally fixed on the heating and ventilation equipment. This also facilitates subsequent disassembly of the circuit board 20 or direct observation of the circuit board 20, and can more conveniently perform maintenance and replacement of the electronic components 22 on the substrate 21. Among them, the specific detachable connection method between the circuit board 20 and the box body 11 can be the cooperation and locking of studs and screw holes, or snap connection, etc. Of course, the connection between the substrate 21 and the main body portion 111 can also be a fixed connection method such as riveting or welding to more firmly fix the substrate 21 on the main body portion 111, avoiding displacement of the electronic components 22 in the accommodation cavity and preventing interference phenomena such as extrusion and collision between the part of the electronic component 22 extending into the accommodating groove 113 and the inner wall of the accommodating groove 113, which may damage the electronic component 22. The present application does not limit this.

[0041] To improve the heat dissipation effect of the electronic component 22, protect the electronic component 22 and improve the tightness of the installation cavity 13, such as Figure 2As shown, a heat conductor 40 is also filled in the installation cavity 13. The electronic component 22 can be reliably contacted with the box body 11 through the heat conductor 40, so as to take out the heat from the box body 11. The heat conductor 40 is filled between the outer wall of the electronic component 22 and the wall of the accommodating groove 113, and can seal and protect the electronic component 22 in the installation cavity 13, thereby preventing dust and condensed water from contacting the electronic component 22, improving the working stability of the electronic control box assembly 1, reducing its failure rate, and at the same time improving the heat dissipation efficiency of the electronic component 22 and the safety performance of the electronic control box assembly 1. The material of the heat conductor 40 can be polyurethane, silicone, epoxy resin, etc. In an embodiment of the present application, the heat conductor 40 is heat-conducting silica gel, which has strong anti-aging ability, good weather resistance, excellent impact resistance, excellent anti-thermal-cold change ability and heat conduction performance, can maintain elasticity within the temperature range of -60 to 200 °C without cracking, can be used at 250 °C for a long time, and the heat-resistant temperature of the heat-curing type is higher. It has excellent electrical performance and insulation ability. After potting, it can effectively improve the insulation between the electronic component 22 and other components in the electronic control box 10, improve the use stability of the electronic component 22, and has no corrosion to the electronic component 22. It has excellent repair ability and can quickly and conveniently take out the sealed electronic component 22 for repair and replacement.

[0042] In another embodiment of the present application, the heat conductor 40 can also be filled in the entire cavity of the installation cavity 13 to provide overall protection for each component inside the installation cavity 13 and improve the sealing performance of the electronic control box 10. When the electronic component 22 is placed in the installation cavity 13 and is in a working state, the relatively hot air around will produce condensation when it encounters the surface of the relatively cold parts inside the electronic control box 10. The increase of condensation will damage the electronic control box 10 and even cause a short circuit. By filling the heat conductor 40 in the installation cavity 13, the electronic component 22 can be completely wrapped, improving the heat dissipation of the electronic control box 10 and greatly reducing the possibility of condensation generated inside the electronic control box 10, thereby improving the safety of the electronic control box 10. The heat conductor 40 can be filled into the installation cavity 13 by first fixing the substrate 21 installed with the electronic component 22 in the installation cavity 13, and then injecting the heat conductor 40 until it cools and solidifies. During the injection process of the heat-conducting silica gel, it can be injected through an injection needle, or it can also be injected through a plurality of prefabricated holes reserved on the substrate 21.

[0043] As Figure 5As shown, in one embodiment, a heat conducting plate 50 is further fixed on the substrate 21. The heat conducting plate 50 can be made of a metal plate or an alloy plate with good heat conducting performance. For example, the heat conducting plate 50 can be made of an aluminum plate, a copper plate, an aluminum alloy plate, etc., so as to improve the heat conduction efficiency. One side of the heat conducting plate 50 is fixedly connected to the substrate 21, and the other side abuts against the inner wall surface of the main body portion 111. Specifically, the side of the heat conducting plate 50 facing away from the substrate 21 abuts against the inner wall surface of the concave portion 114. In order to make the installation of the heat conducting plate 50 and the substrate 21 close and reliable, and at the same time better realize the heat conduction between the heat conducting plate 50 and the substrate 21, a heat conducting silicone grease layer 51 is also bonded between the substrate 21 and the heat conducting plate 50. The heat conducting silicone grease layer 51 is an insulating heat transfer material, and can also insulate between the substrate 21 and the heat conducting plate 50, ensuring the heat exchange performance between the substrate 21 and the heat conducting plate 50. It can be understood that the heat conducting silicone grease layer 51 can also be bonded between the heat conducting plate 50 and the inner wall surface of the main body portion 111, so as to further improve the heat conduction efficiency between the heat conducting plate 50 and the main body portion 111, and also prevent the heat conducting plate 50 from directly contacting the inner wall surface of the main body portion 111 and causing overheating. And the heat conducting plate 50 abuts against the inner wall surface of the concave portion 114, which can reduce the distance between the heat conducting plate 50 and the main body portion 111, thereby reducing the thickness of the heat conducting plate 50, lowering the production cost, and at the same time reducing the overall volume of the electric control box 10.

[0044] The heat conducting plate 50 can be flat and long, so as to contact the main body portion 111 more comprehensively and increase the heat exchange area at the same time. The heat conducting plate 50 can also be a carrier with other cross-sectional shapes, such as a cylinder, a cuboid, a cube, etc. Moreover, the connection mode between the heat conducting plate 50 and the substrate 21 can be a detachable connection, such as a card slot, a snap fastener, etc., which is convenient for replacing the heat conducting plate 50. Of course, it can also be a fixed connection, such as riveting, screwing, etc. Among them, the number of the fastening members for the fixed connection is not limited. In order to better fasten the heat conducting plate 50 to the substrate 21 reliably, the number of the fastening members can be set according to the actual situation. For example, it can be 2, 4, 6, etc. The size of the fastening members is also not limited. For example, it can be an M4*12 screw or an M6*8 screw, etc. This application does not limit the shape and the connection mode of the heat conducting plate 50.

[0045] Please refer to Figures 2 to 4, the heat dissipation member 30 is fixed to the box body 11 and located outside the box body 11. The heat dissipation member 30 includes a first heat dissipation portion 33 and a second heat dissipation portion 34. The first heat dissipation portion 33 contacts the outer wall surface of the protruding portion 112, and the second heat dissipation portion 34 is embedded in the receiving groove 115. The heat dissipation member 30 is used to dissipate the heat transferred from the box body 11 to the outside. The way it is fixed to the box body 11 can be screwed to the protruding portion 112 and / or the concave portion 114. Of course, it can also be in other forms such as snap connection. And the second heat dissipation portion 34 being embedded in the receiving groove 115 can further fix the heat dissipation member 30, and at the same time quickly position the heat dissipation member 30 during installation. Moreover, the second heat dissipation portion 34 can better exchange heat with the heat conduction plate 50 that abuts against the inner wall surface of the concave portion 114, improving the heat exchange efficiency, and can also save the manufacturing materials of the box body 11 and reduce the cost.

[0046] In an embodiment of the present application, as Figure 6 shown, the second heat dissipation portion 34 includes a first extension portion 341 and a second extension portion 342. The first extension portion 341 is arranged parallel to the box body 11, and the second extension portion 342 is connected to the end of the first extension portion 341 and bends towards one side of the first extension portion 341. Specifically, there are at least two second extension portions 342, and the two second extension portions 342 are respectively connected to the opposite ends of the first extension portion 341 and respectively bend towards the same side of the first extension portion 341. The first heat dissipation portion 33 and the first extension portion 341 of the second heat dissipation portion 34 present a stepped shape in the height direction of the electric control box 10, and the first heat dissipation portion 33 is arranged higher than the first extension portion 341 to match the height difference formed by the protruding portion 112 and the concave portion 114 in the height direction of the electric control box 10, so that the first heat dissipation portion 33 and the second heat dissipation portion 34 can contact and conduct heat with the box body 11 more comprehensively to achieve the purpose of heat dissipation. By bending the second heat dissipation portion 34 to form the first extension portion 341 and the second extension portion 342 that are bent and connected, the overall length of the second heat dissipation portion 34 can be reduced under the condition of ensuring that the second heat dissipation portion 34 has a sufficient extension length, and it is also convenient for the second heat dissipation portion 34 to cooperate with the receiving groove 115 for heat dissipation, thereby reducing the overall volume of the electric control box assembly 1.

[0047] In one embodiment, the heat sink 30 is a microchannel heat exchanger, and includes a connected manifold 31 and a heat exchange flat tube 32. The heat exchange flat tube 32 is provided with the above-mentioned first heat dissipation part 33 and the second heat dissipation part 34. A plurality of side-by-side microchannels 321 are formed inside the heat exchange flat tube 32. The cross-sectional shape of each microchannel 321 perpendicular to its extension direction can be rectangular. There is a certain thickness between each microchannel 321 and the surface of the heat exchange flat tube 32 and between the microchannels 321, which can be selected to be 0.2mm-0.5mm, so that the microchannel 321 meets the requirements of pressure resistance and heat resistance. It can be understood that the cross-sectional shape of the microchannel 321 can also be other shapes, such as circular, triangular, trapezoidal, elliptical or other irregular shapes. The microchannel 321 can increase the heat exchange area, expand the heat dissipation surface, increase turbulence, and improve the heat exchange efficiency by means of multiple holes and multiple channels, and has a compact structure, a small volume, saves materials, a small tube diameter, high pressure resistance, and cost savings.

[0048] The header 31 is used to provide refrigerant to the inside of the heat exchange flat tubes 32. In order to allow the refrigerant to circulate and exchange heat quickly inside the header 31, the header 31 is selected to be a hollow cylindrical shape, or it can also be a prism, square column, etc. The refrigerant can be selected as a new type of combustible refrigerant such as R32, R290, etc., which has the advantages of high thermal conductivity, large latent heat of evaporation, good fluidity, and low delivery pressure. Figure 6 As shown, there are at least two collecting pipes 31 , which are arranged oppositely on both sides of the heat exchange flat tubes 32 , and the two oppositely arranged collecting pipes 31 are both provided with a first collecting port 311 and a second collecting port 312 , that is, there are at least two first collecting ports 311 and at least two second collecting ports 312 .

[0049] Both ends of the first heat dissipation part 33 are connected to the first collecting port 311, and both ends of the second extension part away from the first extension part are connected to the second collecting port 312. The connection method is to reduce the leakage of the refrigerant, and welding is selected. The fastening is reliable and pressure-resistant. In this way, the collecting pipe 31 can pass the refrigerant into the microchannel 321 inside the heat exchange flat tube 32 through the first collecting port 311 and the second collecting port 312, and the refrigerant can flow in the first heat dissipation part 33 and the second heat dissipation part 34, thereby increasing the heat exchange area between the refrigerant flow and the box body 11 and improving the heat exchange efficiency. At the same time, the step-shaped height difference formed between the first heat dissipation part 33 and the second heat dissipation part 34 can enable the refrigerant flow to flow naturally in the gradient direction to avoid turbulence. The long sides of the first collecting port 311 and the second collecting port 312 can be parallel to the axial direction of the collecting tube 31, so that the first collecting port 311 and the second collecting port 312 on the collecting tube 31 are axial punchings, which can make full use of the tube wall material of the collecting tube 31 to achieve the punching and flanging depth, thereby increasing the contact area between the collecting tube 31 and the heat exchange flat tube 32 during welding, improving the compressive strength of the welding point, avoiding the leakage of the refrigerant flowing between the collecting tube 31 and the heat exchange flat tube 32, and reducing the cost of production and molding.

[0050] It can be understood that the heat dissipation member 30 can also be entirely disposed within the installation cavity 13 of the electronic control box 10 to enhance the overall structural stability of the electronic control box assembly 1. It can also be partially disposed within the installation cavity 13 of the electronic control box 10, with the other part protruding outside the electronic control box 10. The protruding part is used for connection with an external pipeline. That is, the heat dissipation member 30 can relatively determine its specific position on the box body 11 according to the specific position of the electronic component 22. The present application does not limit the position of the heat dissipation member 30.

[0051] In an embodiment of the present application, please refer again to Figure 2 , a sealing groove 60 surrounding the peripheral edge of the lid 12 is provided between the lid 12 and the main body portion 111. A sealing ring 61 is disposed within the sealing groove 60. The opposite sides of the sealing ring 61 are respectively in sealing contact with the lid 12 and the main body portion 111, making the connection between the lid 12 and the main body portion 111 tighter, further improving the sealing performance of the electronic control box 10. At the same time, it is ensured that the box body 11 and the lid 12 will not separate from each other after installation, preventing the electronic components 22 inside the electronic control box 10 from being exposed to the outside, which may cause damage to the electronic components 22, and preventing the working sparks of the electronic components 22 from splashing to the outside. The sealing ring 61 can be made of a material with good thermal conductivity and insulation such as silicone rubber or ethylene propylene diene monomer rubber. To further improve the connection tightness between the lid 12 and the main body portion 111, their connection method can also be set as screw connection, snap connection, etc., or the connection between the lid 12 and the main body portion 111 can also be a fixed connection, such as welding, etc., ensuring the sealing performance of the electronic control box 10. At this time, the electronic components 22 should be installed before the two are fixedly connected as a whole. The present application does not limit the connection method between the lid 12 and the main body portion 111.

[0052] In Figure 2 exemplarily shown, the box body 11 is locked to the lid 12 through the connection holes corresponding to the lid 12 thereon. The lid 12 is in a flat plate shape, and then the lid 12 is locked to the upper device to achieve the installation of the electronic control box assembly 1. At this time, the heat dissipation member 30 and the electronic components 22 on the electronic control board 20 are all arranged facing the outside of the device. In this way, the spatial layout is reasonable, without occupying the installation space of the heat dissipation member 30, and at the same time, it is convenient to open the box body 11 from the outside and disassemble, assemble, and maintain the electronic control board 20 inside the electronic control box 10.

[0053] Please refer again to Figure 2, in an embodiment of the present application, the electric control box assembly 1 further includes a junction box 70 and a wire harness 71. The junction box 70 is disposed on one side of the electric control box 10 and has a wire passing port 72 communicating with the installation cavity 13. The wire harness 72 is disposed in the junction box 70 and passes through the wire passing port 72 to enter the installation cavity 13, and is electrically connected to the electric control board 20 to supply power and control the electric control box 10. Adding extra components results in problems such as complex structure and low production and assembly efficiency. The junction box 70 is disposed on the side of the electric control box 10, which conforms to the wiring rule of the wire harness 72 in the electrical appliance, enabling the wire harness 72 to run along the side of the electric control box 10 to reach the plug-in position reserved on the electric control board 20, realizing wall-mounted and surface-mounted wiring, and having a good wire harness 72 gathering effect. The wire harness 72 is accommodated on the side of the electric control board 20, can be completely separated from the electric control board 20 to avoid interference, and can also eliminate parts with functions such as separate wire passing and wire crossing, saving the internal space of the electric control box 10. At the same time, the wiring is clearly visible, which is more conducive to wiring design and convenient for later maintenance. To protect the wire harness 71 and ensure the overall sealing of the electric control box 10, heat-conducting silicone is also provided around the wire passing port 72.

[0054] The present application also proposes a heating, ventilation and air conditioning (HVAC) system, including a device main body and the electric control box assembly 1 of the above embodiment. The electric control box assembly 1 is connected to the device main body. Since this HVAC system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0055] It should be noted that the devices of the HVAC system include but are not limited to devices such as air conditioners, multi-connected units, heat pumps, water heaters, and pool machines. By setting the electric control box assembly 1 as described in the above embodiment, the electric control box assembly 1 is a sealed structure, while taking into account the heat dissipation of the electric control box assembly 1, avoiding overheating of the electronic components 22 in the electric control box assembly 1 during operation, reducing the risk of fire caused thereby, and thus improving the overall use safety of the HVAC system.

[0056] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0057] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An electronic control box assembly, characterized in that, Comprising: An electric control box, including a box body and a box cover. The box body includes a main body portion and a protruding portion extending outward from the main body portion. The box cover is hermetically connected to the main body portion and encloses an installation cavity with the main body portion. A receiving groove communicating with the installation cavity is formed in the protruding portion; An electric control board, including a substrate and a plurality of electronic components mounted on the substrate. The substrate is fixed in the installation cavity, and at least a part of the plurality of electronic components extends into the receiving groove; And A heat dissipation member, fixed to the box body and located outside the box body, for dissipating the heat transferred from the box body to the outside.

2. The electronic control box assembly according to claim 1, wherein It further includes a heat conductor; The heat conductor is filled between the outer wall of the electronic component and the wall of the receiving groove.

3. The electronic control box assembly according to claim 2, wherein The heat conductor is heat-conducting silicone.

4. The electronic control box assembly according to any one of claims 1 to 3, characterized in that It further includes a heat-conducting plate; One side of the heat-conducting plate is fixedly connected to the substrate, and the other side abuts against the inner wall surface of the main body portion.

5. The electronic control box assembly according to claim 4, wherein It further includes a heat-conducting silicone grease layer; The heat-conducting silicone grease layer is bonded between the substrate and the heat-conducting plate.

6. The electronic control box assembly according to claim 4, wherein, An inner concave portion extending towards the interior of the receiving cavity is further provided on the main body portion, and the side of the heat-conducting plate facing away from the substrate abuts against the inner wall surface of the inner concave portion.

7. The electronic control box assembly according to claim 6, characterized in that, A receiving groove with an opening communicating with the outside is formed in the inner concave portion. The heat dissipation member includes a first heat dissipation portion and a second heat dissipation portion. The first heat dissipation portion contacts the outer wall surface of the protruding portion, and the second heat dissipation portion is embedded in the receiving groove.

8. The electronic control box assembly according to claim 7, wherein, The heat dissipation member is a microchannel heat exchanger and includes a header pipe and a flat heat exchange pipe that are connected and communicate with each other. The flat heat exchange pipe is provided with the first heat dissipation portion and the second heat dissipation portion.

9. The electronic control box assembly according to any one of claims 1 to 3, characterized in that A sealing groove surrounding the periphery of the box cover is provided between the box cover and the main body portion. A sealing ring is provided in the sealing groove, and the opposite sides of the sealing ring are hermetically abutted against the box cover and the main body portion respectively.

10. The electronic control box assembly according to any one of claims 1 to 3, characterized in that, The substrate is detachably connected to the main body portion.

11. A heating, ventilation and air conditioning (HVAC) system, comprising an equipment main body and an electric control box assembly connected to the equipment main body, characterized in that, The electric control box assembly is the electric control box assembly according to any one of claims 1 to 10.

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