Electric control box and air conditioner comprising same

Abstract

An electric control box and an air conditioner comprising same. The electric control box (100) comprises a box body (1), a circuit board (2), and a heat sink (3). The circuit board (2) is arranged in the box body (1), and comprises a substrate (21) and a heating device (22) provided on the substrate (21). The heat sink (3) is arranged in the box body (1) and is located between the heating device (22) and the box body (1), a through channel (3a) through which a heat dissipation pipe (4) passes is formed on the heat sink (3) or between the heat sink (3) and the box body (1), the heat sink (3) is isolated between the through channel (3a) and the heating device (22), and a clearance hole (1a) is formed on the box body (1) for the heat dissipation pipe (4) passing through the through channel (3a) to pass through the box body (1).

Description

Electrical control box and air conditioner containing it

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202411197146.X, filed on August 28, 2024, and No. 202422105698.5, filed on August 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioning equipment, and in particular to an electrical control box and an air conditioner having therein. Background Technology

[0004] In air conditioning systems, proper heat dissipation for the electronic control unit is crucial, directly impacting the system's reliable, continuous, and full-load operation. In related technologies, the circuit boards inside the control box present heat dissipation challenges, indicating room for improvement. Summary of the Invention

[0005] This application aims to at least partially solve one of the technical problems in the related art. To this end, this application proposes an electrical control box with good heat dissipation performance.

[0006] This application also proposes an air conditioner having the aforementioned electrical control box.

[0007] The electrical control box according to the first aspect of this application includes: a box body; a circuit board disposed in the box body and including a substrate and a heating device disposed on the substrate; a heat sink disposed in the box body and located between the heating device and the box body, a through-channel for passing through a heat sink pipe is formed on the heat sink or between the heat sink and the box body, the heat sink is isolated between the through-channel and the heating device, and a clearance hole is formed on the box body for the heat sink pipe passing through the through-channel to pass through the box body.

[0008] In some embodiments, the heat sink includes a first heat sink, the housing includes a first cover covering the side of the first heat sink away from the circuit board, the first heat sink includes a substrate and a heat dissipation part that are assembled and mated, the substrate is disposed between the heat dissipation part and the first cover, and the through channel includes a first through channel formed between the substrate and the heat dissipation part.

[0009] In some embodiments, the radiator includes a second radiator, the housing includes a first cover covering the side of the second radiator away from the circuit board, the side of the second radiator facing the first cover forms a heat dissipation pipe mating groove that opens toward the first cover, and the through channel includes a second through channel formed between the second radiator and the first cover, the second through channel including the heat dissipation pipe mating groove.

[0010] In some embodiments, the heating element and the heat sink are in contact for heat transfer through a thermally conductive medium, and / or, the surface of the heating element facing away from the circuit board is in contact with the housing for heat transfer.

[0011] In some embodiments, the housing includes a first cover covering the side of the heat sink away from the circuit board, the heat sink being fitted to the first cover by fasteners, or the heat sink being integrally connected to the first cover.

[0012] In some embodiments, the housing includes a first cover covering the side of the heat sink away from the circuit board, the first cover being made of metal; or the first cover includes an inner cover and an outer cover, the inner cover having a window at the corresponding heat sink, and the outer cover being made of metal and covering the window.

[0013] In some embodiments, the control box includes a heat pipe, the heat pipe including a first portion passing through a through channel and a second portion isolated from the box body, the box body separating the second portion from the space inside the box body.

[0014] In some embodiments, a heat dissipation pipe passes through the through-channel, and the electrical control box includes an isolation structure that completely separates the heat dissipation pipe from the space inside the box. The isolation structure includes a heat sink.

[0015] In some embodiments, the housing includes a first cover, the first cover includes a first step portion and a second step portion, the distance from the first step portion to the substrate is less than the distance from the second step portion to the substrate, the heating device includes a first heating device and a second heating device, both the first heating device and the second heating device are disposed on the side of the substrate facing the first cover, and the height of the first heating device is less than the height of the second heating device, the first heating device is disposed corresponding to the first step portion, and a heat sink is provided between the first heating device and the first step portion, the second heating device is disposed corresponding to the second step portion, and a heat sink is provided between the second heating device and the second step portion.

[0016] In some embodiments, a heat sink disposed between the first heating device and the first step portion is spaced apart from a heat sink disposed between the second heating device and the second step portion.

[0017] In some embodiments, the box body further includes a second cover, which is arranged along the thickness direction of the substrate and covers each other, and the first cover and the second cover are snapped together and / or connected by fasteners.

[0018] In some embodiments, the box includes a box body and an operation port cover. The box body has a wiring operation port, and the operation port cover can cover the wiring operation port to close the wiring operation port and make the box a sealed box. The box body has a slot area located at the wiring operation port, and the slot area is provided with a sealing rubber ring for threading wires.

[0019] In some embodiments, the sealing ring has an expandable opening that extends toward the operating port cover plate, and the expandable opening extends through the sealing ring in a direction parallel to the operating port cover plate. The line body passes through the sealing ring by expanding the expandable opening. The operating port cover plate has a protrusion extending toward the box body, and the protrusion extends into the expandable opening.

[0020] In some embodiments, the box body includes a first box cover and a second box cover, the second box cover and the first box cover are arranged along the thickness direction of the substrate and cover each other, the heat sink is disposed between the first box cover and the heat-generating device, the slot area and the wiring operation port are both formed in the second box cover, and the operation port cover plate is snapped into the second box cover and / or connected by fasteners.

[0021] An air conditioner according to the second aspect of this application includes a refrigerant circulation system and an electrical control box according to the first aspect of this application, wherein the refrigerant circulation system provides cooling to heat dissipation pipes passing through a passage.

[0022] In some embodiments, the refrigerant pipe in the refrigerant circulation system serves as a heat dissipation pipe and passes through the clearance hole and the passage channel; or, the refrigerant pipe in the refrigerant circulation system is connected to the heat dissipation pipe passing through the clearance hole and the passage channel.

[0023] In some embodiments, the control box is located in the outdoor unit of the air conditioner, and the refrigerant pipe in the outdoor unit serves as a heat dissipation pipe and passes through the clearance hole and the passage; and / or, the refrigerant circulating in the refrigerant circulation system is a combustible refrigerant.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the structure of an electrical control box according to an embodiment of this application;

[0026] Figure 2 is a magnified view of region A according to the example shown in Figure 1;

[0027] Figure 3 is a magnified view of region B according to the example shown in Figure 1;

[0028] Figure 4 is an exploded view of the structure of an electrical control box according to an embodiment of this application;

[0029] Figure 5 is a schematic diagram of the cooperation of a heat sink, heat pipe, circuit board and second cover according to an embodiment of the present application;

[0030] Figure 6 is a schematic diagram of the engagement of a heat sink, heat pipe, circuit board, and second cover from another angle according to an embodiment of this application;

[0031] Figure 7 is a schematic diagram of the heat sink, heat pipe, circuit board and second cover from another angle according to an embodiment of the present application;

[0032] Figure 8 is a magnified view of region C based on the example shown in Figure 4;

[0033] Figure 9 is a structural schematic diagram of a second box cover and a sealing ring according to an embodiment of the present application;

[0034] Figure 10 is a structural schematic diagram of the second box cover and sealing ring from another angle according to an embodiment of the present application;

[0035] Figure 11 is a structural schematic diagram of an operating port cover plate according to an embodiment of this application;

[0036] Figure 12 is a schematic diagram of the refrigerant circulation system of an air conditioner according to an embodiment of the present application.

[0037] Reference numerals: Electrical control box 100; Box body 1; Clearance hole 1a; Box body 11; First box cover 111; First step portion 1111; Distance H1 from the first step portion to the substrate; Second step portion 1112; Distance H2 from the second step portion to the substrate; Heat dissipation pipe limiting groove 1113; Wiring operation port 1114; Slot area 1115; Second box cover 112; Operation port cover plate 12; Protrusion 121; Circuit board 2; Substrate 21; Heating device 22; First heating device 221; Second heating device 222; Heat sink 3; Through-pass channel 3a; First through-pass channel 3a1; Second through-pass channel 3a2; First heat sink 31; Base 312; Heat dissipation portion 311; Second heat sink 32; Heat dissipation pipe mating groove 321; Heat dissipation pipe 4; Sealing ring 6; Expandable opening 61; Hole 62; Refrigerant circulation system 200; compressor 201; outdoor heat exchanger 202; indoor heat exchanger 203; throttling device 204; reversing assembly 205. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0040] The electrical control box 100 of the first aspect of this application is described below with reference to the accompanying drawings.

[0041] As shown in FIG1, the electrical control box 100 according to an embodiment of the present application includes a box body 1, a circuit board 2, and a heat sink 3. The circuit board 2 is disposed inside the box body 1 and includes a substrate 21 and a heat-generating device 22 disposed on the substrate 21. The heat sink 3 is disposed inside the box body 1 and is located between the heat-generating device 22 and the box body 1. A through-channel 3a for passing a heat sink 4 is formed on the heat sink 3 or between the heat sink 3 and the box body 1. The heat sink 3 is isolated between the through-channel 3a and the heat-generating device 22. A clearance hole 1a is formed on the box body 1 to allow the heat sink 4 passing through the through-channel 3a to pass through the box body 1.

[0042] Circuit board 2 is set inside box 1. Circuit board 2 generates heat when it is working. Since box 1 is a closed box, circuit board 2 cannot directly dissipate heat to the outside environment, and the heat dissipation of circuit board 2 is poor.

[0043] This application provides a heat sink 3 between the heat-generating device 22 and the housing 1. The heat sink 3 has a through-channel 3a, or the heat sink 3 and the housing 1 have a through-channel 3a. A coolant with a lower temperature flows inside the heat sink 4. The heat sink 4 passes through the through-channel 3a to cool the heat sink 3. The coolant flowing inside the heat sink 4 carries away the heat quickly, thereby accelerating the heat exchange speed between the heat sink 3 and the heat-generating device 22 and improving the heat dissipation speed of the circuit board 2.

[0044] The heat pipe 4 passes through the passage 3a, which cools the heat sink 3 and the box 1 at the same time. The heat of the circuit board 2 can be indirectly transferred to the box 1 through heat exchange with the air. The circuit board 2 can also directly transfer heat to the box 1 through thermal radiation. Therefore, accelerating the heat exchange between the box 1 and the heat-generating device 22 can also help accelerate the heat dissipation of the circuit board 2.

[0045] The method of directly inserting the heat pipe 4 inside the housing 1 to dissipate heat and cool the heat-generating device 22 can improve heat transfer efficiency and accelerate the heat dissipation speed of the circuit board 2 compared to placing the heat pipe 4 outside the housing 1.

[0046] By setting up a heat sink 3 to cool the heat-generating device 22, the heat exchange area can be increased and the heat dissipation speed can be accelerated. Compared with the heat exchange of heat to the heat-generating device 22 directly through the heat pipe 4, the heat sink 3 cools the heat-generating device 22 more evenly, which is conducive to improving the working reliability of the heat-generating device 22.

[0047] Furthermore, since the heat sink 3 is positioned between the heat pipe 4 and the circuit board 2, the heat pipe 4 and the circuit board 2 will not be in direct contact. This means that the heat-generating device 22 does not directly release heat to the heat pipe 4, but rather transfers it to the heat pipe 4 through the heat sink 3, improving the temperature uniformity of the heat sink 3. This allows the heat pipe 4 to absorb the heat from the circuit board 2 more fully and comprehensively through the heat sink 3, thus improving heat dissipation efficiency. Moreover, it prevents the high-temperature heat-generating device 22 from directly contacting the low-temperature heat pipe 4 and causing condensation, thereby improving the operational reliability of the circuit board 2. Additionally, it avoids the risk of explosion caused by direct contact between a leaking heat pipe 4 and the circuit board 2, further enhancing the operational reliability of the circuit board 2.

[0048] Similarly, the heat dissipation pipe 4 enters and exits the box 1 through the clearance hole 1a on the box 1. The part of the heat dissipation pipe 4 that passes through the passage 3a inside the box 1 is blocked by the heat sink 3. The part of the heat dissipation pipe 4 extends out of the box 1 through the clearance hole 1a instead of remaining inside the box 1. This can reduce the contact between the heat dissipation pipe 4 and the heat-generating device 22 inside the box 1, reduce the possibility of flammable refrigerant entering the box 1 due to damage to the heat dissipation pipe 4, and improve the safety of the use of the electrical control box 100.

[0049] According to the embodiment of this application, the electrical control box 100 directly dissipates heat from the heat-generating device 22 by providing a heat sink 3 inside the box body 1. The heat dissipation pipe 4 works in conjunction with the heat sink 3 to quickly remove heat, thereby improving the heat dissipation performance of the circuit board 2. Furthermore, the design of the heat sink 3 and the box body 1 can reduce direct contact between the heat dissipation pipe 4 and the heat-generating device 22, thereby reducing the occurrence of flammable refrigerant coming into contact with the heat-generating device 22 and improving the safety of the electrical control box 100.

[0050] In some embodiments of this application, as shown in Figures 2 and 4, the heat sink 3 includes a first heat sink 31, and the housing 1 includes a first cover 111 covering the side of the first heat sink 31 away from the circuit board 2. The first heat sink 31 includes a base 312 and a heat dissipation part 311 that are assembled together (i.e., the base 312 and the heat dissipation part 311 are not two parts of a single piece, but two components that are combined through an assembly process). The substrate 21 is disposed between the heat dissipation part 311 and the first cover 111, and the through channel 3a includes a first through channel 3a1 formed between the substrate 21 and the heat dissipation part 311.

[0051] In this embodiment, the radiator 3 has a through-channel 3a for the heat dissipation pipe 4. By limiting the heat dissipation pipe 4 only by the first radiator 31, the heat dissipation pipe 4 can be assembled with the first radiator 31 and then connected to the housing 1 as a whole, which can reduce the assembly difficulty.

[0052] In some embodiments of this application, as shown in FIG3, the heat sink 3 includes a second heat sink 32, the housing 1 includes a first cover 111 covering the side of the second heat sink 32 away from the circuit board 2, the side of the second heat sink 32 facing the first cover 111 forms a heat dissipation pipe mating groove 321 that opens toward the first cover 111, and the through channel 3a includes a second through channel 3a2 formed between the second heat sink 32 and the first cover 111, the second through channel 3a2 including the heat dissipation pipe mating groove 321.

[0053] In this embodiment, a passage 3a for the heat dissipation pipe 4 is formed between the radiator 3 and the housing 1. The heat dissipation pipe 4 is limited by the first housing cover 111 and the second radiator 32. The structure of the radiator 3 is simple, which can reduce the manufacturing difficulty of the radiator 3 and save manufacturing costs.

[0054] In some embodiments of this application, as shown in FIG3, a heat dissipation pipe mating groove 321 is formed on the side of the second heat sink 32 facing the first cover 111, and a heat dissipation pipe limiting groove 1113 is formed on the side of the first cover 111 facing the circuit board 2, which is open to the second heat sink 32. The heat dissipation pipe mating groove 321 and the heat dissipation pipe limiting groove 1113 together define a second through-pass channel 3a2 for the heat dissipation pipe 4 to pass through.

[0055] It is worth noting that there are multiple heat-generating devices 22 on the circuit board 2. Therefore, optionally, there can be multiple heat sinks 3 to dissipate heat from different heat-generating devices 22 and improve the overall heat dissipation effect of the circuit board 2.

[0056] Optionally, as shown in Figure 4, all of the multiple radiators 3 can be first radiators 31, and the first radiator 31 has a through-channel 3a for passing through the heat dissipation pipe 4.

[0057] Alternatively, all of the multiple radiators 3 may be second radiators 32, and a passage channel 3a for passing through the heat dissipation pipe 4 may be formed between the second radiator 32 and the first cover 111.

[0058] Alternatively, the multiple radiators 3 may include both a first radiator 31 and a second radiator 32, which can be selected according to actual needs.

[0059] In some embodiments of this application, the heat-generating device 22 and the heat sink 3 transfer heat through contact with a non-gas-based thermally conductive medium.

[0060] Optionally, the thermally conductive medium can be a thermally conductive pad or a thermally conductive substrate with good thermal conductivity. The heat-generating device 22 and the heat sink 3 exchange heat indirectly through the thermally conductive pad or the thermally conductive substrate, thereby accelerating the heat exchange between the heat-generating device 22 and the heat sink 3. Alternatively, the thermally conductive medium can also be a coating structure such as thermally conductive silicone grease. Alternatively, the thermally conductive medium can also be a combination of the above-mentioned thermally conductive media, which can be selected according to actual needs.

[0061] In some embodiments of this application, the thermally conductive medium is an insulating thermally conductive medium. With a high voltage applied to the circuit board 2 and the heat sink 3 being a conductor, there is a risk of electrical continuity between the circuit board 2 and the heat sink 3. Therefore, by providing an insulating thermally conductive medium between the heat-generating device 22 and the heat sink 3, electrical continuity between the circuit board 2 and the heat sink 3 can be avoided, thus improving the safety of the electrical control box 100.

[0062] In some embodiments of this application, as shown in FIG1, the side surface of the heating device 22 facing away from the circuit board 2 contacts the housing 1 for heat transfer.

[0063] Since the heat transfer effect of the substrate 21 is poor, the heat-generating device 22 can transfer heat to the housing 1 through the side surface away from the circuit board 2, which can improve the heat dissipation efficiency.

[0064] In some embodiments of this application, as shown in FIG1, the housing 1 includes a first cover 111 covering the side of the heat sink 3 away from the circuit board 2, and the heat sink 3 is assembled to the first cover 111 by fasteners.

[0065] The radiator 3 is assembled to the first cover 111 using fasteners, facilitating the installation of the heat dissipation pipe 4. When the radiator 3 has a through-hole 3a for the heat dissipation pipe 4, the radiator 3 can be assembled with the heat dissipation pipe 4 and then connected to the first cover 111 using fasteners. Alternatively, when there is a through-hole 3a between the radiator 3 and the first cover 111, the heat dissipation pipe 4 can be assembled into the through-hole 3a, and then the radiator 3 can be connected to the first cover 111 using fasteners, simplifying the operation. When the fasteners are detachable, it also facilitates subsequent maintenance and replacement.

[0066] Furthermore, the connection stability between the radiator 3 and the first cover 111 is relatively strong, which can improve the arrangement stability of the heat pipe 4 and help improve the reliability of the cooperation between the heat pipe 4 and the radiator 3.

[0067] In some other embodiments of this application, the housing 1 includes a first cover 111 covering the side of the heat sink 3 away from the circuit board 2, and the heat sink 3 is integrally connected to the first cover 111.

[0068] The radiator 3 is integrated with the first cover 111, which has a strong overall integrity and simplifies the assembly steps of the radiator 3 and the first cover 111, thus improving assembly efficiency.

[0069] For example, when the radiator 3 has a through-channel 3a for passing through the heat dissipation pipe 4, the heat dissipation pipe 4 can be integrally formed on the radiator 3, and then the radiator 3 can be integrally connected to the first cover 111.

[0070] For example, when a through-channel 3a is formed between the radiator 3 and the first cover 111, the heat dissipation pipe 4 and the radiator 3 can be integrally formed on the first cover 111, and the heat dissipation pipe 4, the radiator 3 and the first cover 111 have good integrity.

[0071] In some embodiments of this application, the housing 1 includes a first cover 111 covering the side of the heat sink 3 away from the circuit board 2, and the first cover 111 is made of metal.

[0072] The first cover 111 is made of metal and has good thermal conductivity, which helps to improve the heat dissipation of the control box 100. In addition, the first cover 111 has high structural strength, which can improve the impact resistance of the control box 100.

[0073] In some other embodiments of this application, the housing 1 includes a first cover 111 covering the side of the heat sink 3 away from the circuit board 2. The first cover 111 includes an inner cover and an outer cover. The inner cover has a window at the corresponding heat sink 3, and the outer cover is made of metal and covers the window.

[0074] The outer cover is made of metal and covers the window in the inner cover. The heat inside the box 1 can be quickly exchanged with the outer cover through the window, thereby improving the heat dissipation efficiency of the control box 100.

[0075] Optionally, the inner cover is made of a non-metallic material, which can improve the electrical safety of the control box 100. For example, the inner cover is made of plastic. Making the inner cover non-metallic and the outer cover metallic improves the heat dissipation efficiency of the control box 100 while also saving manufacturing costs.

[0076] In some embodiments of this application, the electrical control box 100 includes a heat dissipation pipe 4, which includes a first part passing through the through-channel 3a and a second part isolated from the box body 1. The box body 1 separates the second part from the space inside the box body 1.

[0077] The first part of the heat dissipation pipe 4 is located inside the box 1 and passes through the through-channel 3a. The first part of the heat dissipation pipe 4 is blocked by the heat sink 3. The second part of the heat dissipation pipe 4 is isolated from the box 1 and is blocked by the box 1, thereby completely separating the heat dissipation pipe 4 from the space inside the box 1, which also separates the heat dissipation pipe 4 from the heat-generating device 22. This reduces the possibility of flammable refrigerant coming into contact with the heat-generating device 22 and improves the safety of the electrical control box 100.

[0078] In some embodiments, the second part of the heat pipe 4 is injection molded into the housing 1, and the housing 1 separates the second part from the space inside the housing 1. The heat pipe 4 and the housing 1 are integrally molded, which can improve the integrity of the heat pipe 4 and the housing 1. Only the heat sink 3 needs to be assembled with the housing 1 and the heat pipe 4 as a whole, which can simplify the assembly process and improve assembly efficiency.

[0079] Furthermore, the other parts of the heat pipe 4 extend out of the housing 1 through the clearance hole 1a on the housing 1, completely separating the heat pipe 4 from the heat-generating device 22, thereby reducing the possibility of the flammable refrigerant in the heat pipe 4 coming into contact with the heat-generating device 22.

[0080] In some embodiments of this application, a heat dissipation pipe 4 is provided through the through channel 3a, and the electrical control box 100 includes an isolation structure that completely separates the heat dissipation pipe 4 from the space inside the box body 1. The isolation structure includes the heat sink 3 described above.

[0081] By setting up an isolation structure to completely separate the heat dissipation pipe 4 from the space inside the box 1, the heat dissipation pipe 4 is also separated from the heat-generating device 22, which can reduce the possibility of flammable refrigerant coming into contact with the heat-generating device 22 and improve the safety of the electrical control box 100.

[0082] Optionally, the heat pipe 4 is completely separated from the space inside the housing 1 by the heat sink 3; or, alternatively, the heat pipe 4 is completely separated from the space inside the housing 1 by the heat sink 3 and the housing 1; or, even more alternatively, the heat pipe 4 is completely separated from the space inside the housing 1 by the heat sink 3 and other components inside the housing 1.

[0083] In some embodiments of this application, as shown in FIG1, the box body 1 includes a first box cover 111, the first box cover 111 includes a first step portion 1111 and a second step portion 1112, the distance H1 from the first step portion 1111 to the substrate 21 is less than the distance H2 from the second step portion 1112 to the substrate 21, the heating device 22 includes a first heating device 221 and a second heating device 222, the first heating device 221 and the second heating device 222 are both disposed on the side of the substrate 21 facing the first box cover 111, and the height of the first heating device 221 is less than the height of the second heating device 222. The first heating device 221 is disposed corresponding to the first step portion 1111, and a heat sink 3 is disposed between the first heating device 221 and the first step portion 1111. The second heating device 222 is disposed corresponding to the second step portion 1112, and a heat sink 3 is disposed between the second heating device 222 and the second step portion 1112.

[0084] The space available for the substrate 21 opposite to the first step portion 1111 is smaller than the space available for the substrate 21 opposite to the second step portion 1112, and the height of the first heating device 221 is smaller than the height of the second heating device 222. Therefore, the first heating device 221 is placed at the corresponding first step portion 1111 of the substrate 21, and the second heating device 222 is placed at the corresponding second step portion 1112 of the substrate 21.

[0085] Optionally, the first heat-generating device 221 includes, but is not limited to, a rectifier bridge, an IGBT (Insulated-Gate Bipolar Transistor), an FRD (Fast Recovery Diode), and an IPM (Intelligent Power Module). The second heat-generating device 222 includes, but is not limited to, capacitors and inductors.

[0086] In some embodiments of this application, as shown in FIG1, the heat sink 3 disposed between the first heating device 221 and the first step portion 1111 is spaced apart from the heat sink 3 disposed between the second heating device 222 and the second step portion 1112.

[0087] By setting two heat sinks 3 corresponding to the first heating element 221 and the second heating element 222 respectively, and the two heat sinks 3 are spaced apart, compared with setting a whole heat sink 3 to dissipate heat for the first heating element and the second heating element 222, on the one hand, the manufacturing cost can be reduced; on the other hand, the heat sink 3 is specifically designed to dissipate heat for the first heating element and the second heating element, which can improve the heat dissipation effect.

[0088] Optionally, the heat dissipation pipe 4 provided in the through-channel 3a formed by the heat sink 3 between the first heating device 221 and the first step portion 1111 and the heat dissipation pipe 4 provided in the through-channel 3a formed by the heat sink 3 between the second heating device 222 and the second step portion 1112 are the same, and the first heating device 221 and the second heating device 222 are cooled by the same heat dissipation pipe 4.

[0089] Alternatively, there may be two heat dissipation pipes 4, which are respectively inserted into the through-channel 3a formed by the heat sink 3 between the first heating device 221 and the first step portion 1111, and into the through-channel 3a formed by the heat sink 3 between the second heating device 222 and the second step portion 1112. The two heat dissipation pipes 4 are dedicated to dissipating heat from the first heating device and the second heating device.

[0090] In some embodiments of this application, as shown in FIG2, the heat sink 3 includes a first heat sink 31, which includes a base 312 and a heat dissipation portion 311. A through-channel 3a is formed between the base 312 and the heat dissipation portion 311. The first heat sink 31 is disposed between the first heating element 221 and the first stepped portion 1111. As shown in FIG1, the heat sink 3 also includes a second heat sink 32, which is disposed between the second heating element 222 and the second stepped portion 1112. A through-channel 3a is formed between the second heat sink 32 and the second stepped portion 1112.

[0091] In some embodiments of this application, as shown in Figures 4 and 5, the box body 1 further includes a second box cover 112, which is arranged along the thickness direction of the substrate 21 and covers each other. The first box cover 111 and the second box cover 112 are snapped together and / or connected by fasteners.

[0092] The first cover 111 is located on the side of the substrate 21 of the circuit board 2 where the first heating device 221 and the second heating device 222 are arranged, and the second cover 112 is located on the side away from the substrate 21 where the first heating device 221 and the second heating device 222 are arranged.

[0093] Optionally, the first cover 111 and the second cover 112 are snap-fitted together; or, alternatively, the first cover 111 and the second cover 112 are fixedly connected by fasteners; or, even more alternatively, the first cover 111 and the second cover 112 are snap-fitted together and positioned before being fixedly connected by fasteners, which can improve the assembly efficiency and connection stability of the first cover 111 and the second cover 112.

[0094] Figures 5, 6, and 7 are schematic diagrams of the assembly structure of the heat sink, heat pipes, circuit board, and second cover.

[0095] In some embodiments of this application, as shown in FIG4, the box body 1 includes a box body 11 and an operating port cover 12.

[0096] As shown in Figure 8, the box body 11 has a wiring operation port 1114. The operation port cover 12 is detachably provided on the wiring operation port 1114 to close the wiring operation port 1114 so that the box body 1 is a sealed box. The box body 11 has a slot area 1115 located at the wiring operation port 1114. The slot area 1115 is provided with a sealing rubber ring 6 for threading wires.

[0097] The wires that extend into or out of the box 1 pass through the wiring operation port 1114. The operation port cover 12 covers the wiring operation port 1114, thereby protecting the wiring area of ​​the box 1 and sealing the wiring operation port 1114 to make the box 1 a sealed box, thus improving the sealing performance of the box 1.

[0098] The wiring access port 1114 has a slot area 1115 for installing a sealing ring 6, ensuring a stable connection between the sealing ring 6 and the box body 1. By providing the sealing ring 6 at the wiring access port 1114, the sealing ring 6 serves two purposes: firstly, it limits the movement of the wires, improving the neatness of the wiring; secondly, it seals the wiring access port 1114, enhancing the airtightness of the electrical control box 100. Furthermore, the sealing ring 6 is an insulating component, further improving the electrical safety of the electrical control box 100.

[0099] By designing the box 1 as a sealed box, that is, without a ventilation area for connecting the inside and outside of the box 1, flammable refrigerant or water can be effectively prevented from entering the box 1, thereby ensuring the electrical safety of the electrical control box 100.

[0100] It's worth noting that with increasingly stringent environmental regulations, refrigerant R290, due to its cleanliness, ozone layer depletion resistance, and minimal impact on the greenhouse effect, is gradually replacing traditional refrigerants like R32 in air conditioners. However, R290 is flammable. Even at low concentrations, a leak of R290 can ignite and explode upon contact with a low-energy spark. Therefore, the safety of using R290 refrigerant must be ensured.

[0101] The electrical control box 100 of this application embodiment is a sealed box, and the heat dissipation pipe 4 is completely separated from the space inside the box body 1 by the heat sink 3 and / or the box body 1. This can effectively prevent flammable refrigerant from entering the box body 1 and coming into contact with the heat-generating device 22, thereby ensuring the safety of the electrical control box 100. The electrical control box 100 of this application embodiment can be applied in air conditioners that use R290 refrigerant.

[0102] In some embodiments of this application, as shown in Figures 9 and 10, the sealing ring 6 has an expandable opening 61 and a hollow hole 62 extending toward the operating port cover plate 12, and the expandable opening 61 extends through the sealing ring 6 in a direction parallel to the operating port cover plate 12. The thread passes through the sealing ring 6 by expanding the expandable opening 61. The operating port cover plate 12 has a protrusion 121 extending toward the box body 11, and the protrusion 121 extends into the expandable opening 61 and the hollow hole 62.

[0103] The expandable opening 61 can produce elastic deformation. The wire body passes through the sealing ring 6 by expanding the expandable opening 61. The sealing ring 6 fits tightly with the wire body at the expandable opening 61, thereby isolating the inside of the box 1 from the outside world, sealing the wiring operation port 1114, and improving the sealing performance of the electrical control box 100.

[0104] As shown in Figure 9, there are multiple expandable openings 61 spaced apart, and a perforated hole 62 is formed between two adjacent expandable openings 61. The perforated hole 62 between the expandable openings 61 facilitates the deformation of the expandable openings 61, facilitates the threading of wires, and improves the assembly efficiency of the electrical control box 100; on the other hand, it also saves manufacturing costs.

[0105] As shown in Figure 11, a protrusion 121 is provided on one side of the operation port cover plate 12 facing the box body 11. The protrusion 121 extends into the expandable opening 61 and the hollow hole 62. The operation port cover plate 12 and the sealing ring 6 have a high degree of fit. The protrusion 121 squeezes the expandable opening 61, so that the sealing ring 6 fits tightly with the wire, further improving the sealing performance at the wiring operation port 1114.

[0106] In some embodiments of this application, as shown in FIG4, the box body 11 includes a first box cover 111 and a second box cover 112. The second box cover 112 and the first box cover 111 are arranged along the thickness direction of the substrate 21 and cover each other. The heat sink 3 is disposed between the first box cover 111 and the heat-generating device 22. As shown in FIG8, the slot area 1115 and the wiring operation port 1114 are both formed on the first box cover 111. The operation port cover plate 12 is snapped into the first box cover 111 and / or connected by fasteners.

[0107] The card slot area 1115 and the wiring operation port 1114 are both formed in the first cover 111, and the heat sink 3 is also located between the first cover 111 and the heat-generating device 22, making subsequent maintenance of the electrical control box 100 more convenient. It can also reduce the structural complexity of the second cover 112 and reduce the manufacturing difficulty.

[0108] Optionally, the operating port cover 12 is snapped into the first box cover 111; alternatively, the operating port cover 12 is fixedly connected to the first box cover 111 by fasteners; alternatively, the operating port cover 12 is snapped into position with the first box cover 111 and then fixedly connected by fasteners, which can improve the assembly efficiency and connection stability of the operating port cover 12 and the first box cover 111.

[0109] Secondly, this application provides an air conditioner including a refrigerant circulation system and an electronic control box 100 according to the first aspect of the present application. The refrigerant circulation system 200 provides cooling capacity to a heat dissipation pipe 4 that is coupled to the passage 3a.

[0110] The refrigerant circulation system 200 provides cooling to the heat dissipation pipe 4 to exchange heat with the heat-generating device 22. There is no need to set up additional heat dissipation components to cooperate with the electrical control box 100, which can speed up the heat dissipation of the electrical control box 100, reduce manufacturing costs, and improve the working reliability of the air conditioner.

[0111] In some embodiments of this application, the refrigerant pipe in the refrigerant circulation system 200 serves as a heat dissipation pipe 4 and passes through the clearance hole 1a and the passage 3a.

[0112] By using the refrigerant pipe in the refrigerant circulation system 200 as the heat dissipation pipe 4 and passing through the clearance hole 1a and the passage 3a, the integrity and sealing of the refrigerant pipe and the heat dissipation pipe 4 of the refrigerant circulation system 200 can be improved, and the occurrence of refrigerant leakage can be reduced.

[0113] In some other embodiments of this application, the refrigerant pipe in the refrigerant circulation system 200 is connected to the heat dissipation pipe 4 passing through the clearance hole 1a and the passage 3a, and the refrigerant in the refrigerant circulation system 200 is delivered to the heat dissipation pipe 4 to provide cooling to the heat dissipation pipe 4.

[0114] By separating the heat dissipation pipe 4 from the refrigerant circulation system 200, and then connecting the refrigerant pipe of the refrigerant circulation system 200 to the heat dissipation pipe 4 after the refrigerant circulation system 200 and the heat dissipation pipe 4 are installed, the manufacturing difficulty of the heat dissipation pipe 4 can be reduced.

[0115] In some embodiments of this application, the electrical control box 100 is disposed in the outdoor unit of the air conditioner, and at least a portion of the refrigerant pipe in the outdoor unit serves as a heat dissipation pipe 4 and passes through the clearance hole 1a and the passage 3a.

[0116] As shown in Figure 12, the refrigerant circulation system 200 includes a compressor 201, an outdoor heat exchanger 202, an indoor heat exchanger 203, a throttling device 204, and a reversing assembly 205. The reversing assembly 205 is used to switch between the outdoor heat exchanger 202 and the indoor heat exchanger 203 when one of them is used as a condenser and the other as an evaporator.

[0117] As shown in Figure 12, the solid line with arrows represents the refrigerant circulation path in the refrigerant circulation system 200 when the air conditioner is cooling the indoor unit. At this time, the reversing assembly 205 connects the exhaust port of the compressor 201 to the outdoor heat exchanger 202 and the return port of the compressor 201 to the indoor heat exchanger 203. The outdoor heat exchanger 202 is used as a condenser, and the indoor heat exchanger 203 is used as an evaporator.

[0118] As shown in Figure 12, the dashed line with arrows represents the refrigerant circulation path in the refrigerant circulation system 200 when the air conditioner is heating the indoor unit. At this time, the reversing assembly 205 connects the exhaust port of the compressor 201 to the indoor heat exchanger 203 and the return port of the compressor 201 to the outdoor heat exchanger 202. The outdoor heat exchanger 202 is used as an evaporator, and the indoor heat exchanger 203 is used as a condenser.

[0119] In some embodiments of this application, as shown in FIG12, the refrigerant pipe located in the outdoor unit between the throttling device 204 and the evaporator 203 is used as a heat dissipation pipe 4 and passes through the passage 3a.

[0120] In some other embodiments of this application, the refrigerant pipe located in the outdoor unit between the reversing assembly 205 and the return port of the compressor 201 can also be used as a heat dissipation pipe 4 passing through the passage 3a.

[0121] Of course, this application is not limited to this. In other embodiments of this application, the refrigerant circulation system 200 may also exclude the reversing component 205 and be a single-cooling system.

[0122] In some embodiments of this application, the refrigerant circulating in the refrigerant circulation system 200 is a combustible refrigerant.

[0123] By designing the electrical control box 100 as a sealed box, the heat dissipation pipe 4 is completely separated from the space inside the box by the heat sink 3 and / or the box body 1, which can effectively prevent flammable refrigerant from entering the box body 1 and coming into contact with the heat-generating device 22, thereby ensuring the safety of the electrical control box 100.

[0124] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0125] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0126] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0127] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0128] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0129] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrical control box, wherein, include: Box body; A circuit board, which is disposed within the housing and includes a substrate and a heating device disposed on the substrate; A heat sink is disposed inside the housing and located between the heat-generating device and the housing. A through-channel for passing through a heat sink pipe is formed on the heat sink or between the heat sink and the housing. The heat sink is isolated between the through-channel and the heat-generating device. An clearance hole is formed on the housing to allow the heat sink pipe passing through the through-channel to pass through the housing.

2. The electrical control box according to claim 1, wherein, The heat sink includes a first heat sink, and the housing includes a first cover covering the side of the first heat sink away from the circuit board. The first heat sink includes a base and a heat dissipation part that are assembled together. The base is disposed between the heat dissipation part and the first cover. The through-channel includes a first through-channel formed between the base and the heat dissipation part.

3. The electrical control box according to claim 1 or 2, wherein, The heat sink includes a second heat sink, and the housing includes a first cover covering the side of the second heat sink away from the circuit board. The side of the second heat sink facing the first cover forms a heat dissipation pipe mating groove that opens toward the first cover. The through channel includes a second through channel formed between the second heat sink and the first cover, and the second through channel includes the heat dissipation pipe mating groove.

4. The electrical control box according to any one of claims 1-3, wherein, The heating element and the heat sink are in contact and transfer heat through a thermally conductive medium, and / or, the side of the heating element facing away from the circuit board is in contact and transfer heat with the housing.

5. The electrical control box according to any one of claims 1-4, wherein, The housing includes a first cover covering the side of the heat sink away from the circuit board, the heat sink being assembled to the first cover by fasteners, or the heat sink being integrally connected to the first cover.

6. The electrical control box according to any one of claims 1-5, wherein, The housing includes a first cover covering the side of the heat sink away from the circuit board, the first cover being made of metal; or the first cover includes an inner cover and an outer cover, the inner cover having a window corresponding to the heat sink, and the outer cover being made of metal and covering the window.

7. The electrical control box according to any one of claims 1-6, wherein, The electrical control box includes a heat dissipation pipe, which includes a first part passing through the through-channel and a second part isolated from the box body. The box body separates the second part from the space inside the box body.

8. The electrical control box according to any one of claims 1-7, wherein, The passageway is provided with a heat dissipation pipe, and the electrical control box includes an isolation structure that completely separates the heat dissipation pipe from the space inside the box. The isolation structure includes the heat sink.

9. The electrical control box according to any one of claims 1-8, wherein, The housing includes a first lid, which includes a first step and a second step. The distance from the first step to the substrate is less than the distance from the second step to the substrate. The heating element includes a first heating element and a second heating element. Both the first heating element and the second heating element are disposed on the side of the substrate facing the first lid. The height of the first heating element is less than the height of the second heating element. The first heating element is disposed corresponding to the first step, and a heat sink is disposed between the first heating element and the first step. The second heating element is disposed corresponding to the second step, and a heat sink is disposed between the second heating element and the second step.

10. The electrical control box according to claim 9, wherein, The heat sink located between the first heating element and the first step portion is spaced apart from the heat sink located between the second heating element and the second step portion.

11. The electrical control box according to claim 9 or 10, wherein, The box body also includes a second box cover, which is arranged along the thickness direction of the substrate and covers each other. The first box cover and the second box cover are snapped together and / or connected by fasteners.

12. The control box according to any one of claims 1-11, wherein, The box includes a box body and an operating port cover. The box body has a wiring operating port, and the operating port cover covers the wiring operating port to close the wiring operating port and make the box a sealed box. The box body has a slot area located at the wiring operating port, and the slot area is provided with a sealing rubber ring for threading wires.

13. The electrical control box according to claim 12, wherein, The sealing ring has an expandable opening that extends toward the operating port cover plate, and the expandable opening extends through the sealing ring in a direction parallel to the operating port cover plate. The thread passes through the sealing ring by expanding the expandable opening. The operating port cover plate has a protrusion that extends toward the box body, and the protrusion extends into the expandable opening.

14. The electrical control box according to claim 12 or 13, wherein, The box body includes a first box cover and a second box cover. The second box cover and the first box cover are arranged along the thickness direction of the substrate and cover each other. The heat sink is disposed between the first box cover and the heat-generating device. The slot area and the wiring operation port are both formed in the first box cover. The operation port cover is snapped into the first box cover and / or connected by fasteners.

15. An air conditioner, wherein, It includes a refrigerant circulation system and an electrical control box according to any one of claims 1-14, wherein the refrigerant circulation system provides cooling to the heat dissipation pipe passing through the passage.

16. The air conditioner according to claim 15, wherein, The refrigerant pipe in the refrigerant circulation system serves as the heat dissipation pipe and passes through the clearance hole and the passage channel; or, the refrigerant pipe in the refrigerant circulation system is connected to the heat dissipation pipe passing through the clearance hole and the passage channel.

17. The air conditioner according to claim 15 or 16, wherein, The electrical control box is located in the outdoor unit of the air conditioner, and the refrigerant pipe in the outdoor unit serves as the heat dissipation pipe and passes through the clearance hole and the passage; and / or, the refrigerant circulating in the refrigerant circulation system is a combustible refrigerant.

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