Air conditioner

Abstract

An air conditioner (1000), comprising a refrigerant circulation system (100) and an electric control heat dissipation component (200). The refrigerant circulation system comprises a compressor (11), a first heat exchanger (12), a second heat exchanger (13), a first throttling device (14) and a second throttling device (15). A discharge port (111) of the compressor (11) is in communication with one of the first heat exchanger (12) and the second heat exchanger (13), and a suction port (112) of the compressor (11) is in communication with the other of the first heat exchanger (12) and the second heat exchanger (13). The first throttling device (14) and the second throttling device (15) are connected in series between the first heat exchanger (12) and the second heat exchanger (13) in the direction from the first heat exchanger (12) to the second heat exchanger (13). The electric control heat dissipation component comprises an electric control box (2) and a heat dissipation pipe (3). The heat dissipation pipe (3) is connected in series between the first throttling device (14) and the second throttling device (15) and is in heat transfer cooperation with the electric control box (2).

Description

air conditioner

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202422109337.8, filed on August 28, 2024, and No. 202411199321.9, 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 technology, and in particular to an air conditioner. Background Technology

[0004] Some air conditioners in related technologies use flammable refrigerants. If the refrigerant leaks and comes into contact with the electrical control box, it can easily cause an explosion. In addition, when the electrical control box generates a lot of heat during operation, it can affect the reliability of the control box. Summary of the Invention

[0005] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes an air conditioner.

[0006] An air conditioner according to an embodiment of this application includes: a refrigerant circulation system, including a compressor, a first heat exchanger, a second heat exchanger, a first throttling device, and a second throttling device; the compressor's exhaust port is connected to one of the first and second heat exchangers, and the compressor's return port is connected to the other of the first and second heat exchangers; the first throttling device and the second throttling device are connected in series between the first and second heat exchangers along a direction from the first heat exchanger to the second heat exchanger; and an electronically controlled heat dissipation component, including an electronic control box and a heat dissipation pipe; the electronic control box is a sealed structure, and the heat dissipation pipe is connected in series between the first and second throttling devices and is heat-transferringly coupled with the electronic control box.

[0007] In some embodiments, the refrigerant circulation system includes a switching valve, which includes a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is switched to be connected to one of the second and third valve ports, and the fourth valve port is switched to be connected to the other of the second and third valve ports. The compressor's discharge port is connected to the first valve port, the compressor's return port is connected to the fourth valve port, the second valve port is connected to the first heat exchanger, and the third valve port is connected to the second heat exchanger.

[0008] In some embodiments, both the first throttling device and the second throttling device are one-way throttling valves. The first throttling device is used to throttle the refrigerant when it flows from the second heat exchanger to the first heat exchanger, and the second throttling device is used to throttle the refrigerant when it flows from the first heat exchanger to the second heat exchanger.

[0009] In some embodiments, the first throttling device is a one-way throttling valve used to throttle the refrigerant as it flows from the second heat exchanger to the first heat exchanger, and the second throttling device is a capillary drain pipe or an electronic expansion valve.

[0010] In some embodiments, the compressor's exhaust port is connected to a first heat exchanger, and the compressor's return port is connected to a second heat exchanger.

[0011] In some embodiments, the first throttling device is a capillary drain pipe, an electronic expansion valve, or a one-way throttling valve, and the second throttling device is a capillary drain pipe, an electronic expansion valve, or a one-way throttling valve. When the refrigerant flows from the first heat exchanger to the second heat exchanger, the first throttling device partially throttles the flow, and the second throttling device assists in throttling.

[0012] In some embodiments, the control box includes a sealed housing and a circuit board disposed within the housing, with heat pipes passing through the housing such that at least a portion of the heat pipes is located within the housing.

[0013] In some embodiments, the control box includes a first heat dissipation structure disposed within the box body. The box body includes a first cover covering the first heat dissipation structure. At least a portion of a heat dissipation pipe extending into the box body engages with the first heat dissipation structure for heat transfer. The first heat dissipation structure is spaced between the heat dissipation pipe and the circuit board.

[0014] In some embodiments, the first heat dissipation structure includes a first heat sink, on which a first groove is formed, the first groove being open toward the direction of the first cover, and a heat dissipation pipe is embedded in the first groove and sandwiched between the first cover and the first heat sink.

[0015] In some embodiments, the first heat dissipation structure includes a second heat sink, which includes a first part and a second part. One of the first part and the second part has a second groove that opens toward the other. A heat dissipation pipe is embedded in the second groove and sandwiched between the first part and the second part.

[0016] In some embodiments, the first heat dissipation structure and the circuit board are in contact and transfer heat through a thermally conductive medium.

[0017] In some embodiments, the electrical control box includes a sealed box body and a circuit board disposed inside the box body. The electrical control box includes a second heat dissipation structure, the inner end of which absorbs heat inside the box body, and a heat dissipation pipe located outside the box body and cooperating with the second heat dissipation structure for heat transfer.

[0018] In some embodiments, the outer surface of the second heat dissipation structure is formed with a third groove that opens in a direction away from the housing, and the heat dissipation pipe is embedded in the third groove.

[0019] In some embodiments, a pressure cap is installed on the outside of the second heat dissipation structure, and a heat dissipation pipe is sandwiched between the pressure cap and the second heat dissipation structure.

[0020] In some embodiments, the box body includes a first lid, which is made of a non-metallic material and has a through opening area, and a second heat dissipation structure is sealed at the opening area.

[0021] In some embodiments, the outer surface of the second heat dissipation structure is formed with a third groove that opens in the direction away from the housing, the heat dissipation pipe is embedded in the third groove, and the first housing cover has a limiting buckle that engages with the heat dissipation pipe.

[0022] In some embodiments, the housing includes a first cover and a second cover. The second cover includes an end plate and a surrounding plate. The surrounding plate is disposed around the end plate to form a receiving cavity for accommodating a circuit board between the end plate and the surrounding plate. An opening is defined at one end of the surrounding plate away from the end plate. The first cover is disposed on the side of the surrounding plate away from the end plate and is connected to the surrounding plate to cover the opening. The first cover is made of metal, and the second heat dissipation structure is part of the first cover.

[0023] In some embodiments, the second heat dissipation structure includes a heat dissipation portion extending toward the circuit board, the heat dissipation portion including a plurality of heat dissipation units spaced apart.

[0024] In some embodiments, the control box includes a sealed box body and a circuit board disposed in the box body. The box body includes a first cover and a second cover. The first cover and the second cover are arranged along the thickness direction of the circuit board. The first cover and the second cover cover each other and form a circumferential seal at the joint.

[0025] In some embodiments, the electrical control box includes a sealed housing and a circuit board disposed within the housing. The housing has a mounting opening, and the electrical control box also includes a wiring structure that is sealed to the mounting opening and defines a wiring hole.

[0026] 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

[0027] Figure 1 is a system schematic diagram of an air conditioner according to an embodiment of this application;

[0028] Figure 2 is a system schematic diagram of an air conditioner according to another embodiment of this application;

[0029] Figure 3 is a system schematic diagram of an air conditioner according to yet another embodiment of this application;

[0030] Figure 4 is a schematic diagram of an electronically controlled heat dissipation component according to an embodiment of this application;

[0031] Figure 5 is a schematic diagram of an electronically controlled heat dissipation component according to another embodiment of this application;

[0032] Figure 6 is an exploded view of the electronically controlled heat dissipation component shown in Figure 5;

[0033] Figure 7 is a partial configuration diagram of an electronically controlled heat dissipation component according to an embodiment of this application;

[0034] Figure 8 is a schematic diagram of an electronically controlled heat dissipation component according to another embodiment of the present application;

[0035] Figure 9 is a schematic diagram of the first cover of the electronically controlled heat dissipation component shown in Figure 8;

[0036] Figure 10 is a schematic diagram of an electronically controlled heat dissipation component according to yet another embodiment of this application;

[0037] Figure 11 is a partial schematic diagram of a box body according to an embodiment of the present application;

[0038] Figure 12 is a magnified view of a portion of point A shown in Figure 11;

[0039] Figure 13 is a partial schematic diagram of a box according to another embodiment of this application;

[0040] Figure 14 is a magnified view of part B shown in Figure 13;

[0041] Figure 15 is a partial composition diagram of a box body according to an embodiment of this application;

[0042] Figure 16 is a diagram showing the fit between the box and the threading structure shown in Figure 15;

[0043] Figure 17 is a schematic diagram of an electronically controlled heat dissipation component according to an embodiment of the present application;

[0044] Figure 18 is an exploded view of a portion of the electronically controlled heat dissipation component shown in Figure 17;

[0045] Figure 19 is a C-direction view of the threading structure shown on the right side in Figure 18;

[0046] Figure 20 is a schematic diagram showing the connection between the threading structure shown in Figure 19, the thread body, and the operating port cover.

[0047] Reference numerals: Air conditioner 1000; Refrigerant circulation system 100; Compressor 11; Exhaust port 111; Return port 112; First heat exchanger 12; Second heat exchanger 13; First throttling device 14; Second throttling device 15; Switching valve 16; First valve port 161; Second valve port 162; Third valve port 163; Fourth valve port 164; Electrically controlled heat dissipation component 200; Electrical control box 2; Box body 21; First box cover 211; Opening area 2111; Limiting buckle 2112; First sealing structure 2113; Side plate 21131; Groove 21132; First-stage step bottom plate 21133; First-stage step inner side plate 21134; Second box cover 212; End plate 2121; Surrounding plate 2122; Second sealing structure 2123; Insert plate 21231; First-stage step top plate 21233; First-stage step outer side plate 21234; Mounting port 214; Wiring operation port 215; Circuit board 22; Substrate 221; First heating element 222; Second heating element 223; First heat dissipation structure 23; First radiator 231; First tube groove 2311; Second radiator 232; First part 2321; Second part 2322; Second tube groove 2323; Thermal conductive medium 24; Second heat dissipation structure 26; Third tube groove 261; Heat dissipation part 262; Heat dissipation unit 2621; Cover 27; Fourth tube groove 271; Wiring structure 28; Wiring hole 281; Hole 282; Inverted structure 283; Operation port cover 29; Protrusion 291; Heat dissipation pipe 3; Wire 4. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] Hereinafter, with reference to the accompanying drawings, an air conditioner 1000 according to an embodiment of the present application will be described.

[0051] The type of air conditioner 1000 according to the embodiments of this application is not limited. It can be an integrated air conditioner (such as a portable air conditioner or a window air conditioner), a split air conditioner (such as a split floor unit, a split wall unit, etc.), a ceiling unit, a duct unit, etc. There is no limitation here. For the sake of simplicity, the following description will take the air conditioner 100 as a split air conditioner as an example.

[0052] As shown in Figures 1 and 2, the air conditioner 1000 includes a refrigerant circulation system 100 and an electronically controlled heat dissipation component 200.

[0053] As shown in Figures 1 and 2, the refrigerant circulation system 100 includes a compressor 11, a first heat exchanger 12, a second heat exchanger 13, a first throttling device 14, and a second throttling device 15. The exhaust port 111 of the compressor 11 is connected to one of the first heat exchanger 12 and the second heat exchanger 13, and the return port 112 of the compressor 11 is connected to the other of the first heat exchanger 12 and the second heat exchanger 13. The first throttling device 14 and the second throttling device 15 are connected in series between the first heat exchanger 12 and the second heat exchanger 13 along the direction from the first heat exchanger 12 to the second heat exchanger 13.

[0054] As shown in Figures 1 and 2, the electronically controlled heat dissipation component 200 includes an electronically controlled box 2 and a heat dissipation pipe 3. The electronically controlled box 2 is a sealed structure, and the heat dissipation pipe 3 is connected in series between the first throttling device 14 and the second throttling device 15, and cooperates with the electronically controlled box 2 for heat transfer. The phrase "the electronically controlled box 2 is a sealed structure" means that the box body does not have ventilation holes or other ventilation structures, the space inside the box does not allow airflow between the inside and outside of the box, and the joints and wiring points of the box body are sealed.

[0055] As shown in Figures 1 and 2, for example, when the exhaust port 111 of compressor 11 is connected to the first heat exchanger 12, and the return port 112 of compressor 11 is connected to the second heat exchanger 13, the refrigerant discharged by compressor 11 through exhaust port 111 passes sequentially through the first heat exchanger 12, the first throttling device 14, the heat dissipation pipe 3, the second throttling device 15, and the second heat exchanger 13, before returning to compressor 11 through return port 112, thus circulating. When the first throttling device 14 throttles the refrigerant, the temperature of the refrigerant flowing through the heat dissipation pipe 3 is lower. Through heat transfer between the heat dissipation pipe 3 and the electrical control box 2, the heat dissipation pipe 3 can absorb the heat from the electrical control box 2, thereby achieving rapid heat dissipation of the electrical control box 2. When the first throttling device 14 does not throttle, but the second throttling device 15 does, or when the first throttling device 14 partially throttles and the second throttling device 15 assists in throttling (i.e., after the refrigerant is partially throttled by the first throttling device 14, although throttling occurs, it does not meet the conditions for entering the second heat exchanger 13; when the refrigerant is throttled again by the second throttling device 15, it meets the conditions for entering the second heat exchanger 13), the temperature of the refrigerant flowing through the heat dissipation pipe 3 is higher than the room temperature but lower than the temperature of the electrical control box 2. Through the heat transfer between the heat dissipation pipe 3 and the electrical control box 2, the heat dissipation pipe 3 can absorb the heat of the electrical control box 2, thereby achieving heat dissipation of the electrical control box 2. It can also reduce the probability of condensation forming during the heat dissipation process, allowing the heat dissipation pipe 3 to be flexibly arranged relative to the electrical control box 2. For example, the heat dissipation pipe 3 can be placed outside the electrical control box 2 to improve assembly convenience, or the heat dissipation pipe 3 can be placed inside the electrical control box 2 to improve heat dissipation efficiency.

[0056] As shown in Figures 1 and 2, for example, when the exhaust port 111 of compressor 11 is connected to the second heat exchanger 13 and the return port 112 of compressor 11 is connected to the first heat exchanger 12, the refrigerant discharged by compressor 11 through exhaust port 111 passes sequentially through the second heat exchanger 13, the second throttling device 15, the heat dissipation pipe 3, the first throttling device 14, and the first heat exchanger 12, and then returns to compressor 11 through return port 112, thus circulating. When the second throttling device 15 throttles the refrigerant, the temperature of the refrigerant flowing through the heat dissipation pipe 3 is lower. Through heat transfer between the heat dissipation pipe 3 and the electrical control box 2, the heat dissipation pipe 3 can absorb the heat from the electrical control box 2, thereby achieving rapid heat dissipation of the electrical control box 2. When the second throttling device 15 does not throttle, but the first throttling device 14 does, or when the second throttling device 15 partially throttles and the first throttling device 14 assists in throttling (i.e., after the refrigerant is partially throttled by the second throttling device 15, although throttling occurs, it does not meet the conditions for entering the first heat exchanger 12; when the refrigerant is throttled again by the first throttling device 14, it meets the conditions for entering the first heat exchanger 12), the temperature of the refrigerant flowing through the heat dissipation pipe 3 is higher than the room temperature but lower than the temperature of the electrical control box 2. Through the heat transfer between the heat dissipation pipe 3 and the electrical control box 2, the heat dissipation pipe 3 can absorb the heat of the electrical control box 2, thereby achieving heat dissipation of the electrical control box 2. It can also reduce the probability of condensation forming during the heat dissipation process, allowing the heat dissipation pipe 3 to be flexibly arranged relative to the electrical control box 2. For example, the heat dissipation pipe 3 can be placed outside the electrical control box 2 to improve assembly convenience, or the heat dissipation pipe 3 can be placed inside the electrical control box 2 to improve heat dissipation efficiency.

[0057] Therefore, according to the embodiment of this application, the air conditioner 1000, by setting the electrical control box 2 in a sealed form, prevents the leaked refrigerant from entering the electrical control box 2 and causing an explosion when the refrigerant circulation system 100 uses flammable refrigerant and leaks, thereby improving the operational reliability of the electrical control box 2. Furthermore, by setting a relatively low-temperature heat dissipation pipe 3 to cooperate with the heat transfer of the electrical control box 2, heat dissipation and cooling of the electrical control box 2 are achieved. Thus, even when the electrical control box 2 is in a sealed form and heat dissipation is inconvenient, a better heat dissipation effect can be achieved through heat transfer with the heat dissipation pipe 3. Moreover, in some cases, by designing or controlling the first throttling device 14 and the second throttling device 15, refrigerant can enter the heat dissipation pipe 3 to dissipate heat from the electrical control box 2 without throttling or with partial throttling, thereby reducing the probability of condensation formation during heat dissipation and allowing for flexible arrangement of the heat dissipation pipe 3 relative to the electrical control box 2.

[0058] In some embodiments, all the refrigerant participating in the circulation in the refrigerant circulation system 100 can pass through the heat dissipation pipe 3. The refrigerant flow through the heat dissipation pipe 3 is large, which can have a better cooling effect on the electrical control box 2, thereby improving the working stability of the electrical control box 2 and thus improving the performance of the air conditioner 1000.

[0059] In some embodiments, as shown in Figures 1 and 2, the refrigerant circulation system 100 includes a switching valve 16, which includes a first valve port 161, a second valve port 162, a third valve port 163, and a fourth valve port 164. The first valve port 161 is switched to be connected to one of the second valve port 162 and the third valve port 163, and the fourth valve port 164 is switched to be connected to the other of the second valve port 162 and the third valve port 163. The exhaust port 111 of the compressor 11 is connected to the first valve port 161, the return port 112 of the compressor 11 is connected to the fourth valve port 164, the second valve port 162 is connected to the first heat exchanger 12, and the third valve port 163 is connected to the second heat exchanger 13. For example, air conditioner 1000 is a heat exchanger for both cooling and heating. The first heat exchanger 12 is the outdoor heat exchanger, and the second heat exchanger 13 is the indoor heat exchanger. In cooling mode, the first valve port 161 is connected to the second valve port 162, and the third valve port 163 is connected to the fourth valve port 164. When compressor 11 is working, the refrigerant discharged from compressor 11 first enters the first heat exchanger 12 (used as the outdoor heat exchanger), and after throttling, enters the second heat exchanger 13 (used as the indoor heat exchanger), and then returns to compressor 11. At this time, the temperature of the first heat exchanger 12 (used as the outdoor heat exchanger) is higher, while the temperature of the second heat exchanger (used as the indoor heat exchanger) is lower. When the temperature of 13 is relatively low, the indoor heat exchanger can be used for indoor cooling. In heating mode, the first valve port 161 is connected to the third valve port 163, and the second valve port 162 is connected to the fourth valve port 164. When the compressor 11 is working, the refrigerant discharged by the compressor 11 first enters the second heat exchanger 13, which is used as an indoor heat exchanger. After throttling, it enters the first heat exchanger 12, which is used as an outdoor heat exchanger, and then returns to the compressor 11. At this time, the temperature of the first heat exchanger 12, which is used as an outdoor heat exchanger, is relatively low, and the temperature of the second heat exchanger 13, which is used as an indoor heat exchanger, is relatively high. The indoor heat exchanger can be used for indoor heating.

[0060] In some embodiments, as shown in FIG1, when the refrigerant circulation system 100 includes the aforementioned switching valve 16, the first heat exchanger 12 is an outdoor heat exchanger, and the second heat exchanger 13 is an indoor heat exchanger, both the first throttling device 14 and the second throttling device 15 are one-way throttling valves. When the refrigerant flows from the first heat exchanger 12 to the second heat exchanger 13, the first throttling device 14 does not throttle, and the second throttling device 15 throttles. When the refrigerant flows from the second heat exchanger 13 to the first heat exchanger 12, the first throttling device 14 throttles, and the second throttling device 15 does not throttle.

[0061] As shown in Figure 1, when the air conditioner 1000 is in cooling mode, the first valve port 161 and the second valve port 162 of the switching valve 16 are connected, and the third valve port 163 and the fourth valve port 164 are connected. The compressor 11 compresses the refrigerant into a high-temperature, high-pressure gas and discharges it through the exhaust port 111. The refrigerant enters the switching valve 16 through the first valve port 161 and then enters the first heat exchanger 12 through the second valve port 162 of the switching valve 16. After flowing out of the first heat exchanger 12, the refrigerant enters the first throttling device 14 (one-way throttling valve). The first throttling device 14 is fully open and does not perform throttling; it only serves as a connecting pipe. After flowing out of the first throttling device 14, the refrigerant flows through the heat dissipation pipe 3 and then enters the second throttling device 15 (one-way throttling valve), where the second throttling device 15 performs throttling. After the refrigerant flows out of the second throttling device 15, it enters the second heat exchanger 13. After flowing out of the second heat exchanger 13, it enters the switching valve 16 through the third valve port 163, and then returns to the compressor 11 through the fourth valve port 164 and the return port 112 in sequence, thus circulating.

[0062] In the cooling mode of the air conditioner 1000, the high-temperature, high-pressure gaseous refrigerant discharged from the exhaust port 111 condenses and dissipates heat in the first heat exchanger 12. The temperature of the refrigerant flowing out of the first heat exchanger 12 is slightly higher than the ambient temperature. Since the first throttling device 14 is fully open and does not have a throttling effect, the second throttling device 15 acts as a throttling element. The refrigerant, whose temperature is higher than the ambient temperature, remains roughly the same after passing through the first throttling device 14, and its temperature is still slightly higher than the ambient temperature. When the refrigerant, whose temperature is slightly higher than the ambient temperature, flows through the heat dissipation pipe 3, it can dissipate heat from the electrical control box 2 and effectively reduce the probability of condensation. The refrigerant, after being throttled by the second throttling device 15, enters the second heat exchanger 13, where it evaporates and absorbs heat, and finally returns to the compressor 11.

[0063] Therefore, in the cooling mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the control box 2, thereby reducing the temperature of the control box 2 and improving its stability. Furthermore, the refrigerant, which is slightly warmer than the ambient temperature, does not undergo throttling before flowing into the heat dissipation pipe 3. During the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat from the control box 2, the probability of condensation formation can be effectively reduced. This allows for flexible arrangement of the heat dissipation pipe 3 relative to the control box 2; for example, the heat dissipation pipe 3 can be placed outside the control box 2 to improve assembly convenience, or it can be placed inside the control box 2 to improve heat dissipation efficiency.

[0064] As shown in Figure 1, when the air conditioner 1000 is in heating mode, the first valve port 161 and the third valve port 163 of the switching valve 16 are connected, and the second valve port 162 and the fourth valve port 164 are connected. The compressor 11 compresses the refrigerant into a high-temperature, high-pressure gas and discharges it through the exhaust port 111. The refrigerant enters the switching valve 16 through the first valve port 161 and then enters the second heat exchanger 13 through the third valve port 163 of the switching valve 16. After flowing out of the second heat exchanger 13, the refrigerant enters the second throttling device 15 (one-way throttling valve). The second throttling device 15 is fully open and does not perform throttling; it only serves as a connecting pipe. After flowing out of the second throttling device 15, the refrigerant passes through the heat dissipation pipe 3 and then enters the first throttling device 14 (one-way throttling valve), where the first throttling device 14 performs throttling. After the refrigerant flows out of the first throttling device 14, it enters the first heat exchanger 12. After flowing out of the first heat exchanger 12, it enters the switching valve 16 through the second valve port 162, and then returns to the compressor 11 after passing through the fourth valve port 164 and the return port 112 in sequence. This cycle continues.

[0065] In the heating mode of the air conditioner 1000, the high-temperature, high-pressure gaseous refrigerant discharged from the exhaust port 111 condenses and dissipates heat in the second heat exchanger 13. The temperature of the refrigerant flowing out of the second heat exchanger 13 is slightly higher than the ambient temperature. Since the second throttling device 15 is fully open and does not have a throttling effect, the first throttling device 14 acts as a throttling element. The refrigerant, whose temperature is higher than the ambient temperature, remains roughly the same after passing through the second throttling device 15, and its temperature is still slightly higher than the ambient temperature. When the refrigerant, whose temperature is slightly higher than the ambient temperature, flows through the heat dissipation pipe 3, it can dissipate heat to the electrical control box 2 and effectively reduce the probability of condensation. The refrigerant, after being throttled by the first throttling device 14, enters the first heat exchanger 12, where it evaporates and absorbs heat, and finally returns to the compressor 11.

[0066] Therefore, in the heating mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the control box 2, thereby reducing the temperature of the control box 2 and improving its stability. Furthermore, the refrigerant, which is slightly warmer than the ambient temperature, does not undergo throttling before flowing into the heat dissipation pipe 3. During the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat from the control box 2, the probability of condensation formation can be effectively reduced. This allows for flexible arrangement of the heat dissipation pipe 3 relative to the control box 2; for example, the heat dissipation pipe 3 can be placed outside the control box 2 to improve assembly convenience, or it can be placed inside the control box 2 to improve heat dissipation efficiency.

[0067] According to an embodiment of this application, an air conditioner 1000, by providing a first throttling device 14 and a second throttling device 15 connected in series between a first heat exchanger 12 and a second heat exchanger 13, when the refrigerant flows from the first heat exchanger 12 to the second heat exchanger 13, the first throttling device 14 functions as a fully conductive device, and the second throttling device 15 functions as a throttling device; when the refrigerant flows from the second heat exchanger 13 to the first heat exchanger 12, the second throttling device 15 functions as a fully conductive device, and the first throttling device 14 functions as a throttling device. In both cooling and heating modes, the refrigerant can dissipate heat from the electrical control box 2, thereby reducing its temperature. At the same time, the refrigerant, which is slightly warmer than the ambient temperature, does not undergo throttling before flowing into the heat dissipation pipe 3. During the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat from the electrical control box 2, the probability of condensation can be effectively reduced. This allows the heat dissipation pipe 3 to be flexibly arranged relative to the electrical control box 2. For example, the heat dissipation pipe 3 can be placed outside the electrical control box 2 to improve assembly convenience, or it can be placed inside the electrical control box 2 to improve heat dissipation efficiency.

[0068] In addition, in cooling and heating modes, all the refrigerant circulating in the air conditioner 1000 can pass through the heat dissipation pipe 3. Due to the large flow rate of refrigerant through the heat dissipation pipe 3, it can have a better cooling effect on the electrical control box 2, thereby improving the working stability of the electrical control box 2 and thus improving the performance of the air conditioner 1000.

[0069] In some embodiments, as shown in FIG2, when the refrigerant circulation system 100 includes the aforementioned switching valve 16, the first heat exchanger 12 is an outdoor heat exchanger, and the second heat exchanger 13 is an indoor heat exchanger, the first throttling device 14 is a one-way throttling valve, and the second throttling device 15 is a capillary drain pipe or an electronic expansion valve. When the refrigerant flows from the first heat exchanger 12 to the second heat exchanger 13, the first throttling device 14 does not throttle; when the refrigerant flows from the second heat exchanger 13 to the first heat exchanger 12, the first throttling device 14 throttles.

[0070] As shown in Figure 2, when the air conditioner 1000 is in cooling mode, the first valve port 161 and the second valve port 162 of the switching valve 16 are connected, and the third valve port 163 and the fourth valve port 164 are connected. The compressor 11 compresses the refrigerant into a high-temperature, high-pressure gas and discharges it through the exhaust port 111. The refrigerant enters the switching valve 16 through the first valve port 161 and then enters the first heat exchanger 12 through the second valve port 162 of the switching valve 16. After flowing out of the first heat exchanger 12, the refrigerant enters the first throttling device 14 (one-way throttling valve). The first throttling device 14 is fully open and does not perform a throttling function; it only serves as a connecting pipe. After the refrigerant flows out of the first throttling device 14, it flows through the heat dissipation pipe 3 and the second throttling device 15 (capillary throttling pipe or electronic expansion valve) in sequence into the second heat exchanger 13. After the refrigerant flows out of the second heat exchanger 13, it enters the switching valve 16 through the third valve port 163 and returns to the compressor 11 through the fourth valve port 164 and the return port 112 in sequence.

[0071] In the cooling mode of the air conditioner 1000, the high-temperature, high-pressure gaseous refrigerant discharged from the exhaust port 111 condenses and dissipates heat in the first heat exchanger 12. The temperature of the refrigerant flowing out of the first heat exchanger 12 is slightly higher than the ambient temperature. Since the first throttling device 14 only acts as a connecting pipe and does not perform a throttling function, the temperature of the refrigerant remains largely unchanged after passing through the first throttling device 14, still slightly higher than the ambient temperature. When the refrigerant, which is slightly higher than the ambient temperature, flows through the heat dissipation pipe 3, it can dissipate heat to the electrical control box 2 and effectively reduce the probability of condensation. After passing through the electrical control box 2, the refrigerant flows through the second throttling device 15 and enters the second heat exchanger 13, where it evaporates and absorbs heat, and finally returns to the compressor 11.

[0072] Therefore, in the cooling mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the control box 2, thereby reducing the temperature of the control box 2 and improving its stability. Furthermore, since the refrigerant is not throttled before flowing into the heat dissipation pipe 3, its temperature is slightly higher than the ambient temperature. During the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat from the control box 2, the probability of condensation formation can be effectively reduced. This allows for flexible arrangement of the heat dissipation pipe 3 relative to the control box 2; for example, the heat dissipation pipe 3 can be placed outside the control box 2 to improve assembly convenience, or it can be placed inside the control box 2 to improve heat dissipation efficiency.

[0073] As shown in Figure 2, when the air conditioner 1000 is in heating mode, the first valve port 161 of the switching valve 16 is connected to the third valve port 163, and the second valve port 162 is connected to the fourth valve port 164. The compressor 11 compresses the refrigerant into a high-temperature, high-pressure gas and discharges it through the exhaust port 111. The refrigerant enters the switching valve 16 through the first valve port 161, and then enters the second heat exchanger 13 through the third valve port 163 of the switching valve 16. After flowing out of the second heat exchanger 13, the refrigerant enters the second throttling device 15 (capillary sprue or electronic expansion valve) for partial throttling, and then enters the first throttling device 14 (one-way throttling valve) through the heat dissipation pipe 3. The first throttling device 14 can play an auxiliary throttling role. The refrigerant flowing out of the first throttling device 14 enters the first heat exchanger 12, and after flowing out of the first heat exchanger 12, it enters the switching valve 16 through the second valve port 162, and then returns to the compressor 11 after passing through the fourth valve port 164 and the return port 112 in sequence.

[0074] In the heating mode of the air conditioner 1000, the high-temperature, high-pressure gaseous refrigerant discharged from the exhaust port 111 condenses and dissipates heat in the second heat exchanger 13. The temperature of the refrigerant flowing out of the second heat exchanger 13 is higher than the ambient temperature. After the refrigerant flowing out of the second heat exchanger 13 is partially throttled by the second throttling device 15, the temperature of the refrigerant decreases, but it is still slightly higher than the ambient temperature. When the refrigerant with a temperature slightly higher than the ambient temperature flows through the heat dissipation pipe 3, it can both dissipate heat from the electrical control box 2 and effectively reduce the probability of condensation. After passing through the heat dissipation pipe 3, the refrigerant enters the first throttling device 14 for auxiliary throttling. After the refrigerant flows out of the first throttling device 14, the throttling is complete. The refrigerant flowing out of the first throttling device 14 enters the first heat exchanger 12 for evaporation and heat absorption, and finally returns to the compressor 11.

[0075] Therefore, in the heating mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the electrical control box 2 when passing through the heat dissipation pipe 3, thereby reducing the temperature of the electrical control box 2 and improving its stability. In addition, after the refrigerant is partially throttled by the second throttling device 15, the refrigerant temperature is lower than the refrigerant temperature at the second end of the second heat exchanger 13, but still higher than the ambient temperature. Thus, during the heat dissipation process of the refrigerant on the electrical control box 2, the probability of condensation formation can be effectively reduced, allowing the heat dissipation pipe 3 to be flexibly arranged relative to the electrical control box 2. For example, the heat dissipation pipe 3 can be placed outside the electrical control box 2 to improve assembly convenience, or it can be placed inside the electrical control box 2 to improve heat dissipation efficiency.

[0076] According to the embodiment of this application, the air conditioner 1000, by providing a first throttling device 14 and a second throttling device 15 between the first heat exchanger 12 and the second heat exchanger 13, wherein the first throttling device 14 is a one-way throttling valve that does not throttle when the refrigerant flows from the first heat exchanger 12 to the second heat exchanger 13 and plays a fully conductive role, while throttling when the refrigerant flows from the second heat exchanger 13 to the first heat exchanger 12 and plays an auxiliary throttling role for the second throttling device 15, the refrigerant can dissipate heat to the electrical control box 2 in both cooling and heating modes of the air conditioner 1000, thereby reducing the temperature of the electrical control box 2, improving the working stability of the electrical control box 2, simplifying the structure of the air conditioner 1000, and reducing production costs. Meanwhile, since the refrigerant is partially throttled or not throttled before flowing into the heat dissipation pipe 3, the refrigerant temperature is slightly higher than the ambient temperature. During the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat from the electrical control box 2, the probability of condensation can be effectively reduced, allowing the heat dissipation pipe 3 to be flexibly arranged relative to the electrical control box 2. For example, the heat dissipation pipe 3 can be placed outside the electrical control box 2 to improve assembly convenience, or it can be placed inside the electrical control box 2 to improve heat dissipation efficiency.

[0077] In addition, in cooling and heating modes, all the refrigerant circulating in the air conditioner 1000 can pass through the heat dissipation pipe 3. Due to the large flow rate of refrigerant through the heat dissipation pipe 3, it can have a better cooling effect on the electrical control box 2, thereby improving the working stability of the electrical control box 2 and thus improving the performance of the air conditioner 1000.

[0078] In some other embodiments of this application, the refrigerant circulation system 100 may not include the aforementioned switching valve 16. In this case, the air conditioner 1000 can be a cooling-only air conditioner or a heating-only air conditioner. Referring to Figure 3, the exhaust port 111 of the compressor 11 is connected to the first heat exchanger 12, and the return port 112 of the compressor 11 is connected to the second heat exchanger 13. For example, the air conditioner 1000 is a cooling-only air conditioner, the first heat exchanger 12 is the outdoor heat exchanger, and the second heat exchanger 13 is the indoor heat exchanger. When the compressor 11 is working, the refrigerant discharged by the compressor 11 first enters the first heat exchanger 12, which is used as the outdoor heat exchanger. After throttling, it enters the second heat exchanger 13, which is used as the indoor heat exchanger, and then returns to the compressor 11. At this time, the temperature of the first heat exchanger 12, which is used as the outdoor heat exchanger, is higher, and the temperature of the second heat exchanger 13, which is used as the indoor heat exchanger, is lower. The air conditioner 1000 can be used for indoor cooling. For example, air conditioner 1000 is a single-heating air conditioner. The first heat exchanger 12 is the indoor heat exchanger, and the second heat exchanger 13 is the outdoor heat exchanger. When compressor 11 is working, the refrigerant discharged by compressor 11 first enters the first heat exchanger 12, which is used as the indoor heat exchanger. After throttling, it enters the second heat exchanger 13, which is used as the outdoor heat exchanger, and then returns to compressor 11. At this time, the temperature of the first heat exchanger 12, which is used as the indoor heat exchanger, is higher, and the temperature of the second heat exchanger 13, which is used as the outdoor heat exchanger, is lower. Air conditioner 1000 can be used to raise the indoor temperature.

[0079] Referring to Figure 3, in some embodiments, when the refrigerant circulation system 100 does not include the aforementioned switching valve 16, and the exhaust port 111 of the compressor 11 is connected to the first heat exchanger 12, and the return port 112 of the compressor 11 is connected to the second heat exchanger 13, the first throttling device 14 is a capillary sprue, an electronic expansion valve, or a one-way throttling valve, and the second throttling device 15 is a capillary sprue, an electronic expansion valve, or a one-way throttling valve. That is, the first throttling device 14 can be selected from a capillary sprue, an electronic expansion valve, and a one-way throttling valve, while the second throttling device 15 can be selected from a capillary sprue, an electronic expansion valve, and a one-way throttling valve. When the refrigerant flows from the first heat exchanger 12 to the second heat exchanger 13, the first throttling device 14 partially throttles the refrigerant, and the second throttling device 15 assists in throttling. That is, after the refrigerant is partially throttled by the first throttling device 14, although it is throttled, it does not meet the conditions for entering the second heat exchanger 13. When the refrigerant is throttled again by the second throttling device 15, it meets the conditions for entering the second heat exchanger 13.

[0080] In this way, when the compressor 11 is working, the refrigerant discharged from the compressor 11 first enters the first heat exchanger 12, and then, after partial throttling by the first throttling device 14, the cooled refrigerant enters the heat dissipation pipe 3. The heat dissipation pipe 3 can dissipate heat for the electrical control box 2, thereby reducing the temperature of the electrical control box 2 and improving its operational stability. Afterward, the refrigerant undergoes auxiliary throttling by the second throttling device 15, and after complete throttling, it enters the second heat exchanger 13 and then returns to the compressor 11. Since the refrigerant undergoes partial throttling before flowing into the heat dissipation pipe 3, its temperature is slightly higher than the ambient temperature. During the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat for the electrical control box 2, the probability of condensation formation can be effectively reduced. This allows the heat dissipation pipe 3 to be flexibly arranged relative to the electrical control box 2. For example, the heat dissipation pipe 3 can be placed outside the electrical control box 2 to improve assembly convenience, or it can be placed inside the electrical control box 2 to improve heat dissipation efficiency.

[0081] In addition, the circulating refrigerant can all pass through the heat dissipation pipe 3. Due to the large flow rate of refrigerant through the heat dissipation pipe 3, it can have a better cooling effect on the electrical control box 2, thereby improving the working stability of the electrical control box 2 and thus improving the performance of the air conditioner 1000.

[0082] Referring to Figure 4, in some embodiments, the control box 2 includes a sealed housing 21 and a circuit board 22 disposed within the housing 21. A heat dissipation pipe 3 passes through the housing 21, such that at least a portion of the heat dissipation pipe 3 is located within the housing 21. Therefore, by passing the heat dissipation pipe 3 through the housing 21, with at least a portion of the heat dissipation pipe 3 located within the housing 21, the heat released by the circuit board 22 within the housing 21 can be transferred to the heat dissipation pipe 3 more quickly, thereby improving the heat dissipation efficiency of the control box 2.

[0083] The circuit board 22 may include a substrate 221 and devices disposed on the substrate 221. The devices include heat-generating devices, such as passive devices (e.g., capacitors and inductors) and power devices (e.g., rectifier bridges, IGBTs, diodes, IPMs). When the circuit board 22 is working, the heat-generating devices will release heat. "The enclosure 21 is sealed" means that the enclosure 21 does not have ventilation holes or other ventilation structures, the space inside the enclosure 21 does not allow airflow between the space inside and outside the enclosure 21, and the joints and wiring points of the enclosure 21 are sealed.

[0084] The heat sink 3 can absorb heat released by the heat-generating device in any way, such as through a solid medium or a gaseous medium. For example, in some embodiments, the control box 2 includes a first heat dissipation structure 23, which is disposed inside the box body 21. The box body 21 includes a first cover 211, which covers the first heat dissipation structure 23. A portion of the heat sink 3 extends into the box body 21 and cooperates with the first heat dissipation structure 23 for heat transfer. The first heat dissipation structure 23 is spaced between the heat sink 3 and the circuit board 22.

[0085] For example, referring to Figure 4, the first heat dissipation structure 23 can be connected to the first cover 211 or to the circuit board 22. The solid medium of the first heat dissipation structure 23 transfers heat from the circuit board 22 to the heat sink 3. The first heat dissipation structure 23 can absorb heat released by the heat-generating components on the circuit board 22 over a wider area and more fully. Through the heat transfer cooperation between the heat sink 3 and the first heat dissipation structure 23, the heat sink 3 can dissipate heat from the control box 2 more efficiently through the first heat dissipation structure 23, improving the heat dissipation efficiency of the control box 2. For example, the first heat dissipation structure 23 can be made of metal or graphite, thus having better thermal conductivity.

[0086] Furthermore, since the first heat dissipation structure 23 is spaced between the heat sink 3 and the circuit board 22, the heat sink 3 and the circuit board 22 will not be in direct contact. In this way, the heat released by the heat-generating device that is not directly opposite the heat sink 3 can also be transferred to the heat sink 3 through the first heat dissipation structure 23, improving the temperature uniformity of the first heat dissipation structure 23. This allows the heat sink 3 to absorb the heat of the circuit board 22 more fully and comprehensively through the first heat dissipation structure 23, thereby improving the heat dissipation efficiency. Moreover, it can prevent the high-temperature heat-generating device from directly contacting the low-temperature refrigerant pipe and forming condensation, thus improving the operational reliability of the circuit board 22. In addition, it can avoid the risk of explosion caused by the heat sink 3 leaking and directly contacting the circuit board 22, thus improving the operational reliability of the circuit board 22.

[0087] Referring to Figure 4, in some embodiments, the first heat dissipation structure 23 includes a first heat sink 231, on which a first groove 2311 is formed. The first groove 2311 is open toward the first cover 211, and a heat dissipation pipe 3 is embedded in the first groove 2311 and sandwiched between the first cover 211 and the first heat sink 231. Exemplarily, the first heat sink 231 can be assembled and connected to the first cover 211, or exemplaryly, the first heat sink 231 can also be mounted on the circuit board 22.

[0088] Therefore, by embedding the heat dissipation pipe 3 in the first pipe groove 2311, the contact area between the heat dissipation pipe 3 and the first radiator 231 can be increased, allowing the heat dissipation pipe 3 to absorb heat more fully and improving the heat dissipation efficiency of the electrical control box 2. Moreover, by providing the first pipe groove 2311 on the first radiator 231 that opens towards the first cover 211, and clamping the heat dissipation pipe 3 between the first cover 211 and the first radiator 231, the installation efficiency of the heat dissipation pipe 3 can be improved, and the assembly of the heat dissipation pipe 3 can be facilitated. For example, after the refrigeration cycle system where the compressor 11 is located is assembled, one end of the refrigerant pipe can be pulled out as the heat dissipation pipe 3 and assembled into the first pipe groove 2311.

[0089] Referring to Figure 4, in some embodiments, the first heat dissipation structure 23 includes a second heat sink 232, which includes a first portion 2321 and a second portion 2322. One of the first portion 2321 and the second portion 2322 has a second groove 2323 that opens towards the other. A heat dissipation pipe 3 is embedded in the second groove 2323 and sandwiched between the first portion 2321 and the second portion 2322. Exemplarily, the first portion 2321 and the second portion 2322 can be assembled and connected, with one of them assembled and connected to the first cover 211 or mounted on the circuit board 22, or exemplaryly, one of the first portion 2321 and the second portion 2322 is assembled and connected to the first cover 211, and the other is mounted on the circuit board 22.

[0090] Therefore, by embedding the heat dissipation pipe 3 in the second pipe groove 2323, the contact area between the heat dissipation pipe 3 and the second radiator 232 can be increased, allowing the heat dissipation pipe 3 to absorb heat more fully and improving the heat dissipation efficiency of the electrical control box 2. Moreover, by having a second pipe groove 2323 that opens towards the other on one of the first part 2321 and the second part 2322, the heat dissipation pipe 3 can be sandwiched between the first part 2321 and the second part 2322, which can improve the installation efficiency of the heat dissipation pipe 3 and facilitate its assembly. For example, the heat dissipation pipe 3 can be assembled with the refrigeration cycle system where the compressor 11 is located, and then one end of the refrigerant pipe can be pulled out as the heat dissipation pipe 3 and assembled into the second pipe groove 2323.

[0091] Of course, this application is not limited to this. For example, in other embodiments of this application, a through hole with open ends can be formed on the first heat dissipation structure 23, and the heat dissipation pipe 3 can be installed into the through hole formed on the first heat dissipation structure 23 by means of tube expansion or the like.

[0092] The number of first heat dissipation structures 23 is not limited and can be one or more. For example, in some embodiments, as shown in FIG4, the circuit board 22 includes a substrate 221 and a first heating device 222 and a second heating device 223 disposed on the substrate 221. The first heating device 222 and the second heating device 223 are both disposed on the side of the substrate 221 facing the first cover 211. A first heat dissipation structure 23 is sandwiched between the first cover 211 and the first heating device 222, and a first heat dissipation structure 23 is also sandwiched between the first cover 211 and the second heating device 223. The first heat dissipation structures 23 at these two locations are spaced apart. Each first heat dissipation structure 23 can be selected from either the first heat sink 231 or the second heat sink 232, thereby avoiding thermal interference between the two first heating devices 222 and the second heating device 223. For example, the heat dissipation pipe 3 is a single pipe and includes two pipe segments connected in series. The two pipe segments are respectively matched with two first heat dissipation structures 23, thereby further simplifying the structure. That is, when the refrigerant flows through the heat dissipation pipe 3, it can first exchange heat with one of the first heat dissipation structures 23 and then exchange heat with the other heat dissipation structure.

[0093] In some embodiments of this application, the first heat dissipation structure 23 may include protrusions extending toward the circuit board 22, and there may be multiple protrusions spaced apart. Therefore, by providing protrusions, on the one hand, the contact area between the first heat dissipation structure 23 and the air inside the housing 21 can be increased to enhance heat dissipation efficiency; on the other hand, the distance between the first heat dissipation structure 23 and the circuit board 22 can be shortened, thereby improving the heat absorption effect on the circuit board 22 and further improving heat dissipation efficiency. The shape of the protrusions is not limited; for example, they may be sheet-like or columnar.

[0094] For example, at least a portion of the protruding structure is disposed corresponding to the heat dissipation pipe 3, thereby allowing the heat absorbed by the protruding structure to be transferred to the heat dissipation pipe 3 more quickly, thus improving the heat dissipation efficiency.

[0095] Referring to Figure 4, in some embodiments, the first heat dissipation structure 23 and the circuit board 22 are in contact and transfer heat through a thermally conductive medium 24. Thus, the thermally conductive medium 24 allows for indirect heat transfer between the first heat dissipation structure 23 and the circuit board 22, making heat dissipation more efficient and improving the heat dissipation efficiency of the control box 2. For example, the thermally conductive medium 24 may include at least one of thermally conductive metal, thermally conductive grease, thermally conductive silicone, thermally conductive pad, etc. Exemplarily, when the first heat dissipation structure 23 includes a protruding structure extending toward the circuit board 22, the protruding structure and the circuit board 22 are in contact and transfer heat through the thermally conductive medium 24.

[0096] Referring to Figures 5 and 6, in some embodiments, the electrical control box 2 includes a sealed housing 21 and a circuit board 22 disposed within the housing 21, with the heat dissipation pipe 3 located outside the housing 21. Therefore, by placing the heat dissipation pipe 3 outside the sealed housing 21, the risk of accidental leakage of the heat dissipation pipe 3, which could cause refrigerant to enter the housing 21 and come into contact with the circuit board 22, resulting in an explosion, can be avoided, thereby improving the safety of the electrical control box 2.

[0097] The circuit board 22 may include a substrate 221 and devices disposed on the substrate 221. The devices include heat-generating devices, such as passive devices (e.g., capacitors and inductors) and power devices (e.g., rectifier bridges, IGBTs, diodes, IPMs). When the circuit board 22 is working, the heat-generating devices will release heat. "The enclosure 21 is sealed" means that the enclosure 21 does not have ventilation holes or other ventilation structures, the space inside the enclosure 21 does not allow airflow between the space inside and outside the enclosure 21, and the joints and wiring points of the enclosure 21 are sealed.

[0098] Referring to Figures 5 and 6, in some embodiments, the electrical control box 2 includes a second heat dissipation structure 26. The inner end of the second heat dissipation structure 26 absorbs heat within the box body 21, and the heat dissipation pipe 3 outside the box body 21 cooperates with the second heat dissipation structure 26 for heat transfer. In this way, the second heat dissipation structure 26 can absorb heat from inside the box body 21 and transfer that heat to the heat dissipation pipe 3 outside the box body 21, thereby achieving the effect of heat dissipation for the electrical control box 2. For example, the first heat dissipation structure 23 can be made of materials such as metal or graphite, thus giving it better thermal conductivity.

[0099] Referring to Figure 7, in some embodiments, the outer surface of the second heat dissipation structure 26 has a third groove 261 that opens in the direction away from the housing 21, and the heat dissipation pipe 3 is embedded in the third groove 261. Therefore, by embedding the heat dissipation pipe 3 in the third groove 261, the contact area between the heat dissipation pipe 3 and the second heat dissipation structure 26 can be increased, allowing the heat dissipation pipe 3 to absorb heat more fully and improving the heat dissipation efficiency of the electrical control box 2. Furthermore, by providing a third groove 261 that opens in the direction away from the housing 21 on the second radiator 232, the installation efficiency of the heat dissipation pipe 3 can be improved, facilitating its assembly. For example, after the refrigeration cycle system containing the compressor 11 is assembled, one end of the refrigerant pipe can be pulled out as the heat dissipation pipe 3 and assembled into the third groove 261.

[0100] Of course, this application is not limited to this. For example, in other embodiments of this application, through holes with open ends can be formed on the second heat dissipation structure 26, and the heat dissipation pipe 3 can be installed into the through holes formed on the second heat dissipation structure 26 by means of tube expansion or the like.

[0101] In some embodiments, a pressure cap 27 is installed on the outer side of the second heat dissipation structure 26, and the pressure cap 27 and the second heat dissipation structure 26 clamp the heat dissipation pipe 3. Thus, by providing the pressure cap 27, the fit stability between the heat dissipation pipe 3 and the second heat dissipation structure 26 can be improved, and the heat dissipation reliability of the electrical control box 2 can be improved.

[0102] For example, a fourth groove 271 that mates with the third groove 261 can be formed on the cover 27, and the heat dissipation pipe 3 is also embedded in the fourth groove 271, thereby improving the positioning stability of the cover 27 for the heat dissipation pipe 3.

[0103] For example, the pressure cover 27 is assembled and connected to the second heat dissipation structure 26, thereby facilitating the fixed installation of the pressure cover 27. However, this application is not limited to this. For example, the pressure cover 27 can also be configured to be connected to the box body 21, etc.

[0104] For example, the housing 21 includes a first cover 211, and a second heat dissipation structure 26 is provided corresponding to the first cover 211. The cooperation relationship between the second heat dissipation structure 26 and the first cover 211 is not limited, and will be described with examples below.

[0105] In some embodiments, referring to FIG7, the box body 21 includes a first lid 211, which is made of non-metallic material and has a through opening area 2111. A second heat dissipation structure 26 is sealed at the opening area 2111. Thus, by providing a non-metallic first lid 211 and an opening area 2111 on it, which is then sealed by a second heat dissipation structure 26 with good thermal conductivity, heat dissipation requirements can be met while saving on the use of metal materials, reducing the weight and cost of the box body 21.

[0106] Specifically, when "the housing 21 includes a first cover 211, the first cover 211 is made of non-metallic material and has a through opening area 2111, and the second heat dissipation structure 26 is sealed at the opening area 2111", the second heat dissipation structure 26 also has various installation options. For example, in some embodiments, the second heat dissipation structure 26 can be integrally connected to the first cover 211. Or, in other embodiments, the second heat dissipation structure 26 is assembled and connected to the first cover 211. Or, in other embodiments, the second heat dissipation structure 26 is mounted on the circuit board 22 and passes through the opening area 2111.

[0107] When the second heat dissipation structure 26 is integrated into the first cover 211, no subsequent assembly steps are required to achieve the connection between the second heat dissipation structure 26 and the first cover 211, improving assembly efficiency. Furthermore, the sealing at the connection point between the second heat dissipation structure 26 and the first cover 211 is better controlled, improving the safety of the electrical control box 2. Additionally, the second heat dissipation structure 26 can be connected to the first cover 211 more reliably and stably, improving the reliability of heat dissipation. The method of integrating the second heat dissipation structure 26 into the first cover 211 is not limited. For example, when the first cover 211 is a plastic part, the second heat dissipation structure 26 can be disposed in the molding mold of the first cover 211 and integrally injection molded with the first cover 211. Alternatively, the second heat dissipation structure 26 can also be connected to the first cover 211 by means of adhesive or welding.

[0108] When the second heat dissipation structure 26 is assembled and connected to the first cover 211, the second heat dissipation structure 26 can be fixed to the first cover 211 by means of snap-fit, threaded connection, riveting, etc., thereby simplifying the processing of the first cover 211. Moreover, by assembling and connecting the second heat dissipation structure 26 to the first cover 211, it is beneficial to achieve sealing of the opening area 2111.

[0109] When the second heat dissipation structure 26 is mounted on the circuit board 22 and passes through the opening area 2111, the heat transfer stability between the second heat dissipation structure 26 and the circuit board 22 can be improved, which is conducive to the circuit board 22 transferring heat more fully to the second heat dissipation structure 26. Moreover, the setting of the second heat dissipation structure 26 will not put pressure on the first cover 211, and the volume of the second heat dissipation structure 26 can be flexibly set, which is convenient to improve and optimize the heat transfer effect of the second heat dissipation structure 26.

[0110] The number of opening areas 2111 is not limited and can be one or more. For example, in some embodiments, as shown in FIG10, the circuit board 22 includes a substrate 221 and a first heating element 222 and a second heating element 223 disposed on the substrate 221. The first heating element 222 and the second heating element 223 are both disposed on the side of the substrate 221 facing the first cover 211. The first cover 211 has two opening areas 2111, which are respectively disposed corresponding to the first heating element 222 and the second heating element 223. Each opening area 2111 is provided with a second heat dissipation structure 26. Each second heat dissipation structure 26 can be fixed by any of the following methods: "the second heat dissipation structure 26 can be integrally connected to the first cover 211", "the second heat dissipation structure 26 is assembled and connected to the first cover 2111", or "the second heat dissipation structure 26 is mounted on the circuit board 22 and passes through the opening area 2111". Thus, by providing multiple opening areas 2111, the metal material used in the box body 21 can be further reduced, and the weight and cost of the box body 21 can be further reduced. For example, the heat dissipation pipe 3 is a single pipe and includes two pipe segments connected in series. The two pipe segments are respectively matched with two second heat dissipation structures 26, thereby further simplifying the structure. That is, when the refrigerant flows through the heat dissipation pipe 3, it can first exchange heat with one of the second heat dissipation structures 26, and then exchange heat with the other two heat dissipation structures.

[0111] A first heat dissipation structure 23 is sandwiched between the first heating element 222 and the first cover 211 and the second heating element 223. The first heat dissipation structures 23 at these two locations are spaced apart. Each first heat dissipation structure 23 can be either the first radiator 231 or the second radiator 232, thereby avoiding thermal interference between the two first heating elements 222 and the second heating element 223. The heat dissipation pipe 3 is a single pipe and includes two pipe segments connected in series. The two pipe segments are respectively matched with the two first heat dissipation structures 23, thereby further simplifying the structure. That is, when the refrigerant flows through the heat dissipation pipe 3, it can first exchange heat with one of the first heat dissipation structures 23 and then exchange heat with the other heat dissipation structure.

[0112] In other embodiments of this application, referring to Figures 8 and 9, the first cover 211 can also be made of metal, and the second heat dissipation structure 26 is a part of the first cover 211. In this case, the box body 21 can also include a second cover 212, which includes an end plate 2121 and a surrounding plate 2122. The surrounding plate 2122 is disposed around the end plate 2121 to form a receiving cavity for accommodating the circuit board 22 between the end plate 2121 and the surrounding plate 2122. The end of the surrounding plate 2122 away from the end plate 2121 defines an opening. The first cover 211 is disposed on the side of the surrounding plate 2122 away from the end plate 2121 and is connected to the surrounding plate 2122 to cover the opening. Thus, by using a part of the entire metal first cover 211 as the second heat dissipation structure 26, the overall structure of the electrical control box 2 can be simplified, the assembly complexity reduced, and heat dissipation can be facilitated over a wider area, thereby improving heat dissipation efficiency.

[0113] In some embodiments of this application, referring to Figures 6 and 7, the second heat dissipation structure 26 includes a heat dissipation portion 262 extending toward the circuit board 22, and the heat dissipation portion 262 includes a plurality of heat dissipation units 2621 spaced apart. Therefore, by providing the heat dissipation portion 262, on the one hand, the contact area between the second heat dissipation structure 26 and the air inside the housing 21 can be increased to increase heat dissipation efficiency; on the other hand, the distance between the second heat dissipation structure 26 and the circuit board 22 can be shortened, thereby improving the heat absorption effect on the circuit board 22 and further improving heat dissipation efficiency. The shape of the heat dissipation unit 2621 is not limited; for example, it can be a heat sink shape, a heat dissipation protrusion shape, or a heat dissipation column shape. The heat dissipation column can be a cylinder, prism, cone, etc. For example, the heat dissipation unit 2621 is a cone with a cross-sectional area that gradually decreases toward the circuit board 22.

[0114] For example, referring to FIG7, at least a portion of the heat dissipation part 262 is disposed corresponding to the heat dissipation pipe 3, thereby the heat absorbed by the heat dissipation part 262 can be transferred to the heat dissipation pipe 3 more quickly, thereby improving the heat dissipation efficiency.

[0115] For example, the second heat dissipation structure 26 and the circuit board 22 are in contact and transfer heat through the thermally conductive medium 24. Thus, the indirect contact between the second heat dissipation structure 26 and the circuit board 22 via the thermally conductive medium 24 makes heat dissipation more efficient and improves the heat dissipation efficiency of the control box 2. For example, the thermally conductive medium 24 may include at least one of thermally conductive metal, thermally conductive grease, thermally conductive silicone, thermally conductive pad, etc. For example, when the second heat dissipation structure 26 includes a heat dissipation part 262, the heat dissipation part 262 and the circuit board 22 are in contact and transfer heat through the thermally conductive medium 24.

[0116] In some embodiments of this application, referring to Figures 6 and 7, when the outer surface of the second heat dissipation structure 26 has a third tube groove 261 that opens in a direction away from the housing 21, the heat dissipation pipe 3 is embedded in the third tube groove 261, and the non-metallic first housing cover 211 has an opening area 2111, a limiting buckle 2112 that engages with the heat dissipation pipe 3 can be provided on the first housing cover 211. This improves the assembly efficiency and stability of the heat dissipation pipe 3, and facilitates the subsequent assembly of the pressure cap 27. Furthermore, in other embodiments, by providing the limiting buckle 2112, the pressure cap 27 can be omitted as needed, thereby reducing weight and cost.

[0117] For example, referring to Figures 6 and 7, limiting buckles 2112 can be set at both ends of the length of the third tube groove 261. In this way, when a section of the heat dissipation pipe 3 is fitted with the third tube groove 261, the limiting buckles 2112 at both ends of the length of the third tube groove 261 can be used to improve the fit stability between the heat dissipation pipe 3 and the third tube groove 261.

[0118] It is worth noting that, without contradiction, the first lid 211 and the second lid 212 of any of the above embodiments can be combined with the following embodiments to achieve the airtight design of the box body 21.

[0119] In some embodiments, referring to Figures 5 and 6, when the housing 21 includes a first cover 211 and a second cover 212, the first cover 211 and the second cover 212 are arranged along the thickness direction of the circuit board 22 and cover each other, forming a circumferential seal at the joint between the first cover 211 and the second cover 212. Therefore, the structure of the housing 21 is simple, facilitating the assembly of the circuit board 22 and enabling the housing 21 to be sealed. For example, the circuit board 22 can be pre-installed on the first cover 211 or the second cover 212, and then the first cover 211 and the second cover 212 can be closed. Exemplarily, the first cover 211 and the second cover 212 can be connected by snap-fit ​​and / or by threaded connectors, thereby achieving rapid assembly.

[0120] For example, in some embodiments, a sealing ring can be used between the first cover 211 and the second cover 212 to achieve a circumferential seal at their joint. In other embodiments, the edge of the first cover 211 is integrally formed with a first sealing structure 2113, and the edge of the second cover 212 is integrally formed with a second sealing structure 2123. The first sealing structure 2113 and the second sealing structure 2123 form a circumferential seal through form-fitting, thus eliminating the need for a sealing ring and avoiding leakage problems caused by its failure. Furthermore, in other embodiments, a sealing ring can be used simultaneously to achieve a further seal while using the first sealing structure 2113 and the second sealing structure 2123.

[0121] In some embodiments, referring to Figures 11 and 12, one of the first sealing structure 2113 and the second sealing structure 2123 is a groove 21132 defined by two side plates 21131, and the other is an insert plate 21231 inserted into the groove 21132. That is, one of the first sealing structure 2113 and the second sealing structure 2123 includes two side plates 21131, and a groove 21132 is formed between the two side plates 21131. One of the first sealing structure 2113 and the second sealing structure 2123 is an insert plate 21231 inserted into the groove 21132. Thus, the first sealing structure 2113 and the second sealing structure 2123 have simple structures, are easy to process and assemble, and have good sealing effects.

[0122] In some embodiments, referring to Figures 13 and 14, both the first sealing structure 2113 and the second sealing structure 2123 are stepped sealing structures, and the first sealing structure 2113 and the second sealing structure 2123 achieve a sealing fit through stepped interlocking. For example, one of the first sealing structure 2113 and the second sealing structure 2123 includes a first-step bottom plate 21133 and a first-step inner side plate 21134. The first-step inner side plate 21134 extends upward relative to the first-step bottom plate 21133, and the first-step inner side plate 21134 is located on the side of the first-step bottom plate 21133 closer to the interior of the housing 21. The other of the first sealing structure 2113 and the second sealing structure 2123 includes a first-step top plate 21233 and a first-step outer side plate 21234. The first-step outer side plate 21234 is positioned relative to the first-step bottom plate 21233. The top plate 21233 extends downwards, and the outer side plate 21234 of the first-stage step is located on the side of the top plate 21233 of the first-stage step closer to the outside of the box 21. The outer side plate 21234 of the first-stage step is located on the side of the inner side plate 21134 of the first-stage step away from the inside of the box 21. The bottom plate 21133 of the first-stage step abuts against the bottom of the outer side plate 21234 of the first-stage step, and the top plate 21233 of the first-stage step abuts against the top of the inner side plate 21134 of the first-stage step. Thus, the first sealing structure 2113 and the second sealing structure 2123 have simple structures, are easy to process and assemble, and have good sealing effects. It is worth noting that the "top" and "bottom" directions mentioned in this article refer to the directions shown in the figure. When the electrical control box 2 is installed and used, the "top" and "bottom" directions of the electrical control box 2 are not limited to those shown in the figure. For example, the electrical control box 2 shown in the figure can be installed upright, upside down, or vertically.

[0123] In some embodiments, as shown in Figures 15 and 16, the sealed housing 21 has a mounting opening 214, and the electrical control box 2 further includes a wiring structure 28, which is sealed to the mounting opening 214 and defines a wiring hole 281. This satisfies the sealing requirements at the wiring point. For example, when the housing 21 includes the aforementioned mutually overlapping first cover 211 and second cover 212, the mounting opening 214 can be formed on one of the first cover 211 and second cover 212, or between the first cover 211 and the second cover 212.

[0124] For example, the threading structure 28 is snapped into and fixed to the housing 21 at the mounting opening 214, for example, by being inserted into a slot, thereby improving the assembly efficiency of the threading structure 28. For example, referring to FIG19, the threading structure 28 has a buckle structure 283, and the housing 21 has a snap-fit ​​structure located at the mounting opening 214. The buckle structure 283 can extend into the snap-fit ​​structure in the assembly direction, but cannot be pulled out in the reverse direction.

[0125] For example, referring to Figure 16, the "threading hole 281" can be formed as a perforated structure that penetrates the threading structure 28 along the extension direction of the wire body 4, thereby achieving a simple seal through the interference fit between the perforation and the wire body 4. Alternatively, referring to Figures 18 and 19, the "threading hole 281" can also be formed as a gap-shaped structure that penetrates the threading structure 28 both along the extension direction of the wire body 4 and radially through the threading structure 28, allowing the wire body 4 to be radially inserted into the threading hole 281. This also allows the connector at the end of the wire body 4 to easily mate with the threading structure 28, thereby improving the ease of assembly.

[0126] In some embodiments, referring to Figures 17 and 18, the housing 21 has a wiring access port 215, a mounting port 214 is located at the edge of the wiring access port 215, and a wire threading structure 28 is embedded in the mounting port 214. The housing 21 assembly also includes an access port cover 29, which is mounted on the housing 21 and covers the wiring access port 215 and the wire threading structure 28. Thus, after the wire 4 is engaged with the wire threading structure 28, the connector on the wire 4 can be connected to the circuit board 22 through the wiring access port 215. This allows the housing 21 to be pre-assembled before wiring, facilitating the overall assembly and wiring of the electrical control box 2. Furthermore, the access port cover 29 can be detachably connected to the housing 21, so that after removing the access port cover 29 from the housing 21, maintenance can still be performed through the wiring access port 215, thus facilitating later maintenance.

[0127] In some embodiments, referring to Figures 18-20, the threading hole 281 can penetrate the threading structure 28 in the direction towards the operating port cover 29 and in a direction parallel to the operating port cover 29. The wire 4 passes through the threading structure 28 by opening the threading hole 281 in the direction from the operating port cover 29 to the housing 21. The operating port cover 29 has a protrusion 291 extending into the housing body, which extends into the threading hole 281. Thus, the wire 4 can be inserted into the threading hole 281 radially, facilitating the assembly of the wire 4 with a connector at its end with the threading structure 28. Furthermore, by providing the protrusion 291 extending into the housing body on the operating port cover 29, the expanded threading hole 281 is sealed, thereby improving the sealing performance while maintaining a relatively simple structure.

[0128] For example, the threading structure 28 may also have a perforated hole 282 extending through the operating port cover plate 29. By setting the perforated hole 282, it is beneficial to open the threading hole 281, as well as to reduce the weight and cost of the threading structure 28. At this time, the protrusion 291 may also be set to extend into the perforated hole 282, thereby further improving the sealing performance while ensuring a relatively simplified structure.

[0129] When air conditioners use flammable and explosive refrigerants such as R290, the refrigerant, at low concentrations, may ignite and explode upon contact with a low-energy spark. Therefore, from a safety perspective, the control box is designed as a sealed enclosure to reduce the risk of explosion. However, the inductors, IGBTs, FRDs, IPMs, and other components on the control board generate significant heat. Under high temperatures, a sealed control box makes heat dissipation even more difficult, causing heat to accumulate inside the control box. This leads to increased temperatures of the components within the control box and a decrease in its reliability.

[0130] Considering that air cooling (which involves attaching large components to a large heatsink and using air cooling to dissipate heat from the heatsink) has relatively poor air convection, and in high-temperature environments, it is difficult to quickly remove the heat from the control box, causing the air conditioner to operate at a reduced frequency to reduce the heat generated by the control box, thus affecting the cooling effect of the air conditioner. Furthermore, air cooling only dissipates heat from the heat-generating components that are easy to attach heatsinks to, and cannot effectively dissipate heat from sealed cavities and other high-power components such as PFC inductors and electrolytic capacitors.

[0131] Therefore, the air conditioner according to the embodiment of this application couples the first cover and the second cover to form a sealed box, which reduces the risk of explosion and improves the reliability of the air conditioner. It also achieves timely heat dissipation through the cooperation of the electrical control box and the refrigerant pipe. The refrigerant in the refrigerant pipe is taken from between the two throttling devices, which not only improves the heat dissipation effect of the electrical control box, but also reduces the risk of condensation. This solves the problem of limited operation of the air conditioner under high temperature conditions.

[0132] In the description of this application, it should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0133] 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.

[0134] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "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 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.

[0135] 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.

[0136] 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.

[0137] 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 air conditioner, wherein, include: A refrigerant circulation system includes a compressor, a first heat exchanger, a second heat exchanger, a first throttling device, and a second throttling device. The compressor's exhaust port is connected to one of the first and second heat exchangers, and the compressor's return port is connected to the other of the first and second heat exchangers. The first and second throttling devices are connected in series between the first and second heat exchangers along the direction from the first heat exchanger to the second heat exchanger. An electronically controlled heat dissipation component includes an electronic control box and a heat dissipation pipe. The electronic control box is a sealed structure, and the heat dissipation pipe is connected in series between the first throttling device and the second throttling device, and cooperates with the electronic control box for heat transfer.

2. The air conditioner according to claim 1, wherein, The refrigerant circulation system includes a switching valve, which includes a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is switched to be connected to one of the second valve port and the third valve port, and the fourth valve port is switched to be connected to the other of the second valve port and the third valve port. The compressor's exhaust port is connected to the first valve port, and the compressor's return port is connected to the fourth valve port. The second valve port is connected to the first heat exchanger, and the third valve port is connected to the second heat exchanger.

3. The air conditioner according to claim 2, wherein, Both the first throttling device and the second throttling device are one-way throttling valves. The first throttling device is used to throttle the refrigerant when it flows from the second heat exchanger to the first heat exchanger, and the second throttling device is used to throttle the refrigerant when it flows from the first heat exchanger to the second heat exchanger.

4. The air conditioner according to claim 2, wherein, The first throttling device is a one-way throttling valve used to throttle the refrigerant as it flows from the second heat exchanger to the first heat exchanger, and the second throttling device is a capillary throttling pipe or an electronic expansion valve.

5. The air conditioner according to claim 1, wherein, The compressor's exhaust port is connected to the first heat exchanger, and the compressor's return port is connected to the second heat exchanger.

6. The air conditioner according to claim 5, wherein, The first throttling device is a capillary drain pipe, an electronic expansion valve, or a one-way throttling valve, and the second throttling device is a capillary drain pipe, an electronic expansion valve, or a one-way throttling valve. When the refrigerant flows from the first heat exchanger to the second heat exchanger, the first throttling device partially throttles the flow, and the second throttling device assists in throttling.

7. The air conditioner according to any one of claims 1-6, wherein, The electrical control box includes a sealed box body and a circuit board disposed inside the box body, and the heat dissipation pipe passes through the box body so that at least a portion of the heat dissipation pipe is located inside the box body.

8. The air conditioner according to claim 7, wherein, The electrical control box includes a first heat dissipation structure disposed inside the box. The box includes a first cover covering the first heat dissipation structure. At least a portion of the heat dissipation pipe extending into the box engages with the first heat dissipation structure for heat transfer. The first heat dissipation structure is spaced between the heat dissipation pipe and the circuit board.

9. The air conditioner according to claim 8, wherein, The first heat dissipation structure includes a first heat sink, on which a first tube groove is formed. The first tube groove is open toward the first cover. The heat dissipation tube is embedded in the first tube groove and sandwiched between the first cover and the first heat sink.

10. The air conditioner according to claim 8 or 9, wherein, The first heat dissipation structure includes a second heat sink, which includes a first part and a second part. One of the first part and the second part has a second tube groove that opens toward the other. The heat dissipation tube is embedded in the second tube groove and sandwiched between the first part and the second part.

11. The air conditioner according to any one of claims 8-10, wherein, The first heat dissipation structure and the circuit board are in contact and transfer heat through a thermally conductive medium.

12. The air conditioner according to any one of claims 1-6, wherein, The electrical control box includes a sealed box body and a circuit board disposed inside the box body. The electrical control box includes a second heat dissipation structure. The inner end of the second heat dissipation structure absorbs heat inside the box body. The heat dissipation pipe is located outside the box body and cooperates with the second heat dissipation structure for heat transfer.

13. The air conditioner according to claim 12, wherein, The outer surface of the second heat dissipation structure has a third groove that opens in a direction away from the housing, and the heat dissipation pipe is embedded in the third groove.

14. The air conditioner according to claim 13, wherein, A pressure cap is installed on the outside of the second heat dissipation structure, and the heat dissipation pipe is sandwiched between the pressure cap and the second heat dissipation structure.

15. The air conditioner according to claim 12, wherein, The box body includes a first lid, which is made of non-metallic material and has a through opening area, and the second heat dissipation structure is sealed at the opening area.

16. The air conditioner according to claim 15, wherein, The outer surface of the second heat dissipation structure is formed with a third tube groove that opens in the direction away from the box body. The heat dissipation tube is embedded in the third tube groove. The first box cover has a limiting buckle that engages with the heat dissipation tube.

17. The air conditioner according to claim 12, wherein, The box body includes a first lid and a second lid. The second lid includes an end plate and a surrounding plate. The surrounding plate is disposed around the end plate to form a receiving cavity for accommodating a circuit board between the end plate and the surrounding plate. An opening is defined at the end of the surrounding plate away from the end plate. The first lid is disposed on the side of the surrounding plate away from the end plate and is connected to the surrounding plate to cover the opening. The first lid is made of metal. The second heat dissipation structure is a part of the first lid.

18. The air conditioner according to any one of claims 12-17, wherein, The second heat dissipation structure includes a heat dissipation section extending toward the circuit board, and the heat dissipation section includes a plurality of heat dissipation units spaced apart.

19. The air conditioner according to any one of claims 1-18, wherein, The electrical control box includes a sealed box body and a circuit board disposed inside the box body. The box body includes a first cover and a second cover. The first cover and the second cover are arranged along the thickness direction of the circuit board. The first cover and the second cover cover each other and form a circumferential seal at the joint.

20. The air conditioner according to any one of claims 1-19, wherein, The electrical control box includes a sealed box body and a circuit board disposed inside the box body. The box body has an installation port. The electrical control box also includes a wiring structure, which is sealed to the installation port and defines a wiring hole.

Images