Air conditioner

Abstract

The air conditioner comprises a refrigerant circulation system and an electric control heat dissipation component, the refrigerant circulation system comprises a compressor, a first heat exchanger, a second heat exchanger, a first throttling device and a second throttling device, an exhaust port of the compressor communicates with one of the first heat exchanger and the second heat exchanger, and an exhaust port of the compressor communicates with the other of the first heat exchanger and the second heat exchanger; an air return port of the compressor communicates with the other one of the first heat exchanger and the second heat exchanger, and the first throttling device and the second throttling device are connected between the first heat exchanger and the second heat exchanger in series in the direction from the first heat exchanger to the second heat exchanger; the electric control heat dissipation component comprises an electric control box and a heat dissipation pipe, the electric control box is of a closed structure, and the heat dissipation pipe is connected between the first throttling device and the second throttling device in series and matched with the electric control box in a heat transfer mode. According to the air conditioner, the electric control box can give consideration to sealing performance and good heat dissipation performance, and the reliability of the air conditioner can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. Background Art

[0002] Some air conditioners in the related art use flammable refrigerants. When the refrigerant leaks and comes into contact with the electric control box, it is likely to cause an explosion risk. In addition, when the electric control box generates a large amount of heat during operation, it will affect the working reliability of the electric control box. Summary of the Utility Model

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present application provides an air conditioner, in which the electric control box of the air conditioner can take into account airtightness and good heat dissipation, which is beneficial to improving the reliability of the air conditioner.

[0004] The air conditioner according to an embodiment of the present 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 exhaust port of the compressor is communicated with one of the first heat exchanger and the second heat exchanger, and the suction port of the compressor is communicated with the other of the first heat exchanger and the second heat exchanger. The first throttling device and the second throttling device are connected in series between the first heat exchanger and the second heat exchanger along the direction from the first heat exchanger to the second heat exchanger; an electric control heat dissipation component including an electric control box and a heat dissipation pipe. The electric control box is of an airtight structure, and the heat dissipation pipe is connected in series between the first throttling device and the second throttling device and is in heat transfer cooperation with the electric control box.

[0005] In the air conditioner according to the present application, by setting the electric control box in an airtight form, when the refrigerant circulation system uses a flammable refrigerant and the refrigerant leaks, the leaked refrigerant will not enter the electric control box to cause an explosion risk, thereby improving the working reliability of the electric control box. And, by arranging a heat dissipation pipe with a relatively low temperature in heat transfer cooperation with the electric control box, heat dissipation and temperature reduction of the electric control box are realized. Thus, in the case where the electric control box is in an airtight form and is not easy to dissipate heat, a good heat dissipation effect can be achieved through heat transfer with the heat dissipation pipe. Moreover, in some cases, through the design or control of the first throttling device and the second throttling device, the refrigerant that does not undergo throttling or undergoes partial throttling can enter the heat dissipation pipe to dissipate heat from the electric control box, thereby reducing the probability of forming condensed water during the heat dissipation process, and enabling the heat dissipation pipe to be flexibly arranged relative to the electric control box.

[0006] In some embodiments, the refrigerant circulation system includes a switching valve. The switching valve 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 communicate with one of the second valve port and the third valve port, and the fourth valve port is switched to communicate with the other of the second valve port and the third valve port. The exhaust port of the compressor is communicated with the first valve port, the suction port of the compressor is communicated with the fourth valve port, the second valve port is communicated with the first heat exchanger, and the third valve port is communicated with the second heat exchanger.

[0007] 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.

[0008] In some embodiments, the first throttling device is a one-way throttling valve and 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 a capillary throttle tube or an electronic expansion valve.

[0009] In some embodiments, the exhaust port of the compressor is communicated with the first heat exchanger, and the suction port of the compressor is communicated with the second heat exchanger.

[0010] In some embodiments, the first throttling device is a capillary throttle tube or an electronic expansion valve or a one-way throttling valve, and the second throttling device is a capillary throttle tube or 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 throttles partially, and the second throttling device throttles in an auxiliary manner.

[0011] In some embodiments, the electronic control box includes a sealed box body and a circuit board disposed inside the box body. The heat dissipation tube penetrates through the box body so that at least a part of the heat dissipation tube is located inside the box body.

[0012] In some embodiments, the electronic control box includes a first heat dissipation structure disposed inside the box body. The box body includes a first box cover that covers the first heat dissipation structure. At least a part of the heat dissipation tube extending into the box body is in heat transfer cooperation with the first heat dissipation structure. The first heat dissipation structure is spaced between the heat dissipation tube and the circuit board.

[0013] In some embodiments, the first heat dissipation structure includes a first radiator. A first tube groove is formed on the first radiator. The first tube groove opens towards the direction of the first box cover. The heat dissipation tube is embedded in the first tube groove and is clamped between the first box cover and the first radiator.

[0014] In some embodiments, the first heat dissipation structure includes a second radiator, the second radiator includes a first part and a second part, one of the first part and the second part has a second tube groove that opens in a direction towards the other, the heat dissipation tube is embedded in the second tube groove and is clamped between the first part and the second part.

[0015] In some embodiments, the first heat dissipation structure and the circuit board transfer heat through a heat-conducting medium in contact.

[0016] In some embodiments, the electric control box includes a sealed box body and a circuit board disposed within the box body, the electric control box includes a second heat dissipation structure, an inner end of the second heat dissipation structure absorbs heat within the box body, and the heat dissipation tube is located outside the box body and is in heat transfer cooperation with the second heat dissipation structure.

[0017] In some embodiments, a third tube groove that opens in a direction away from the box body is formed on an outer surface of the second heat dissipation structure, and the heat dissipation tube is embedded in the third tube groove.

[0018] In some embodiments, a gland is installed outside the second heat dissipation structure, and the gland and the second heat dissipation structure clamp the heat dissipation tube.

[0019] In some embodiments, the box body includes a first box cover, the first box cover is made of a non-metallic material and has a through opening area thereon, and the second heat dissipation structure is sealed at the opening area.

[0020] In some embodiments, a third tube groove that opens in a direction away from the box body is formed on an outer surface of the second heat dissipation structure, the heat dissipation tube is embedded in the third tube groove, and the first box cover has a limit buckle that is in snap-fit with the heat dissipation tube.

[0021] In some embodiments, the box body includes a first box cover and a second box cover, the second box cover includes an end plate and a surrounding plate, the surrounding plate is disposed around the end plate to form a receiving cavity for receiving the circuit board between the end plate and the surrounding plate, one end of the surrounding plate away from the end plate defines an opening, the first box cover is disposed on a side of the surrounding plate away from the end plate and is connected to the surrounding plate to seal the opening, the first box cover is made of a metal material, and the second heat dissipation structure is a part of the first box cover.

[0022] In some embodiments, the second heat dissipation structure includes a heat dissipation portion that extends in a direction towards the circuit board, and the heat dissipation portion includes a plurality of heat dissipation units arranged at intervals.

[0023] In some embodiments, the electric control box includes a sealed box body and a circuit board disposed within the box body. The box body includes a first box cover and a second box cover. The first box cover and the second box cover are arranged along the thickness direction of the circuit board. The first box cover and the second box cover are mutually covered and form a circumferential sealing fit at the joint.

[0024] In some embodiments, the electric control box includes a sealed box body and a circuit board disposed within the box body. The box body has an installation opening, and the electric control box further includes a wire threading structure. The wire threading structure is sealed at the installation opening and defines a wire threading pore.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of an air conditioner system according to an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of an air conditioner system according to another embodiment of the present application;

[0028] Figure 3 is a schematic diagram of an air conditioner system according to still another embodiment of the present application;

[0029] Figure 4 is a schematic diagram of an electric control heat dissipation component according to an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of an electric control heat dissipation component according to another embodiment of the present application;

[0031] Figure 6 is Figure 5 an exploded view of the electric control heat dissipation component shown in

[0032] Figure 7 is a partial composition diagram of an electric control heat dissipation component according to an embodiment of the present application;

[0033] Figure 8 is a schematic diagram of an electric control heat dissipation component according to still another embodiment of the present application;

[0034] Figure 9 is Figure 8 a schematic diagram of the first box cover of the electric control heat dissipation component shown in

[0035] Figure 10 is a schematic diagram of an electric control heat dissipation component according to yet another embodiment of the present application;

[0036] Figure 11It is a partial schematic view of a box body according to an embodiment of the present application;

[0037] Figure 12 It is Figure 11 a partial enlarged view of the position A shown in

[0038] Figure 13 It is a partial schematic view of a box body according to another embodiment of the present application;

[0039] Figure 14 It is Figure 13 a partial enlarged view of the position B shown in

[0040] Figure 15 It is a partial composition diagram of a box body according to an embodiment of the present application;

[0041] Figure 16 It is Figure 15 a cooperation diagram of the box body and the wire threading structure shown in

[0042] Figure 17 It is a schematic view of an electric control heat dissipation component according to an embodiment of the present application;

[0043] Figure 18 It is Figure 17 an exploded view of a partial composition of the electric control heat dissipation component shown in

[0044] Figure 19 It is Figure 18 a view in the C direction of the wire threading structure on the right side shown in

[0045] Figure 20 It is Figure 19 a cooperation schematic view of the wire threading structure with the wire body and the operation port cover plate shown in

[0046] Reference numerals:

[0047] Air conditioner 1000;

[0048] Refrigerant circulation system 100; Compressor 11; Exhaust port 111; Suction 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;

[0049] Electric control heat dissipation component 200;

[0050] Electric control box 2;

[0051] Box body 21; First box cover 211; Opening area 2111; Limit buckle 2112;

[0052] First sealing structure 2113; Side plate 21131; Groove 21132;

[0053] First step bottom plate 21133; first step inner side plate 21134;

[0054] Second box cover 212; end plate 2121; enclosure plate 2122;

[0055] Second sealing structure 2123; Insert plate 21231;

[0056] The first step top plate 21233; the first step outer side plate 21234;

[0057] Installation port 214; Wiring operation port 215;

[0058] Circuit board 22; substrate 221; first heating element 222; second heating element 223;

[0059] A first heat dissipation structure 23;

[0060] First radiator 231; first tube slot 2311;

[0061] The second heat sink 232; the first portion 2321; the second portion 2322; the second tube groove 2323;

[0062] Heat transfer medium 24;

[0063] The second heat dissipation structure 26; the third tube slot 261; the heat dissipation portion 262; the heat dissipation unit 2621;

[0064] Gland 27; fourth pipe groove 271;

[0065] Threading structure 28; threading hole 281; hollow hole 282; undercut structure 283;

[0066] Operation port cover plate 29; raised portion 291;

[0067] Heat dissipation pipe 3; Line body 4. DETAILED DESCRIPTION

[0068] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0069] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0070] Next, with reference to the accompanying drawings, an air conditioner 1000 according to an embodiment of the present application will be described.

[0071] The type of the air conditioner 1000 according to the embodiment of the present application is not limited. It may be an integrated air conditioner (such as a mobile air conditioner or a window air conditioner, etc.), or a split air conditioner (such as a split cabinet air conditioner, a split wall-mounted air conditioner, etc.), or it may also be a ceiling air conditioner, a duct air conditioner, etc. There is no limitation here. For the sake of simplicity of description, in the following, the air conditioner 100 is taken as an example of a split air conditioner for illustration.

[0072] As Figure 1 and Figure 2 shown, the air conditioner 1000 includes a refrigerant circulation system 100 and an electronic control heat dissipation component 200.

[0073] As Figure 1 and Figure 2 shown, 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 communicated with one of the first heat exchanger 12 and the second heat exchanger 13, and the suction port 112 of the compressor 11 is communicated 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 along the direction from the first heat exchanger 12 to the second heat exchanger 13.

[0074] As Figure 1 and Figure 2 shown, the electronic control heat dissipation component 200 includes an electronic control box 2 and a heat dissipation pipe 3. The electronic control box 2 is a closed structure. 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 electronic control box 2. The statement that "the electronic control box 2 is a closed structure" means that there are no ventilation holes or other structures capable of ventilation on the box body of the electronic control box 2, the space inside the box body does not communicate with the space outside the box body for air flow, and parts such as the splicing and wiring parts of the box body are sealed.

[0075] As Figure 1 and Figure 2As shown, for example, when the exhaust port 111 of the compressor 11 is in communication with the first heat exchanger 12 and the suction port 112 of the compressor 11 is in communication with the second heat exchanger 13, the refrigerant discharged from the compressor 11 through the exhaust port 111 passes 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 in sequence, and then returns to the compressor 11 through the suction port 112, and circulates in this way. Among them, when the first throttling device 14 throttles, the temperature of the refrigerant flowing through the heat dissipation pipe 3 is relatively low. Through the heat transfer between the heat dissipation pipe 3 and the electronic control box 2, the heat dissipation pipe 3 can absorb the heat of the electronic control box 2, thereby realizing the rapid heat dissipation of the electronic control box 2. When the first throttling device 14 does not throttle but the second throttling device 15 throttles, or when the first throttling device 14 partially throttles and the second throttling device 15 assists in throttling (that is, after the refrigerant passes through the partial throttling of the first throttling device 14, although it throttles but does not meet the condition for entering the second heat exchanger 13, when the refrigerant passes through the second throttling device 15 for auxiliary throttling, it meets the condition 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 electronic control box 2. Through the heat transfer between the heat dissipation pipe 3 and the electronic control box 2, the heat dissipation pipe 3 can absorb the heat of the electronic control box 2, thereby realizing the heat dissipation of the electronic control box 2, and can reduce the probability of forming condensed water during the heat dissipation process, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electronic control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electronic control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electronic control box 2 to improve the heat dissipation efficiency.

[0076] Such as Figure 1 And Figure 2As shown, for example, when the exhaust port 111 of the compressor 11 is communicated with the second heat exchanger 13 and the suction port 112 of the compressor 11 is communicated with the first heat exchanger 12, the refrigerant discharged from the compressor 11 through the exhaust port 111 sequentially passes 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 the compressor 11 through the suction port 112 for such a cycle. Among them, when the second throttling device 15 throttles, the temperature of the refrigerant flowing through the heat dissipation pipe 3 is relatively low. Through the heat transfer between the heat dissipation pipe 3 and the electric control box 2, the heat dissipation pipe 3 can absorb the heat of the electric control box 2, thereby realizing the rapid heat dissipation of the electric control box 2. When the second throttling device 15 does not throttle but the first throttling device 14 throttles, or when the second throttling device 15 partially throttles and the first throttling device 14 assists in throttling (that is, after the refrigerant passes through the partial throttling of the second throttling device 15, although it throttles but does not reach the condition for entering the first heat exchanger 12, when the refrigerant passes through the first throttling device 14 for auxiliary throttling, it reaches the condition 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 electric control box 2. Through the heat transfer between the heat dissipation pipe 3 and the electric control box 2, the heat dissipation pipe 3 can absorb the heat of the electric control box 2, thereby realizing the heat dissipation of the electric control box 2, and can reduce the probability of forming condensed water during the heat dissipation process, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electric control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electric control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electric control box 2 to improve the heat dissipation efficiency.

[0077] Thus, for the air conditioner 1000 according to the embodiment of the present application, by setting the electric control box 2 in a closed form, when the refrigerant circulation system 100 uses a flammable refrigerant and the refrigerant leaks, the leaked refrigerant will not enter the electric control box 2 to cause an explosion, thereby improving the working reliability of the electric control box 2. And, by setting the heat dissipation pipe 3 with a relatively low temperature to cooperate with the heat transfer of the electric control box 2, the heat dissipation and cooling of the electric control box 2 are realized. Thus, in the case where the electric control box 2 is in a closed form and is not convenient for heat dissipation, a good heat dissipation effect can be achieved through the heat transfer with the heat dissipation pipe 3. Moreover, in some cases, through the design or control of the first throttling device 14 and the second throttling device 15, the refrigerant that does not throttle or partially throttles can enter the heat dissipation pipe 3 to dissipate heat from the electric control box 2, thereby reducing the probability of forming condensed water during the heat dissipation process, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electric control box 2.

[0078] In some embodiments, all the refrigerant participating in the cycle in the refrigerant circulation system 100 can pass through the heat dissipation pipe 3. The refrigerant flow rate flowing through the heat dissipation pipe 3 is large, which can achieve a good temperature reduction effect on the electric control box 2, thereby improving the working stability of the electric control box 2 and further improving the use performance of the air conditioner 1000.

[0079] In some embodiments, such as Figure 1 andFigure 2 As shown, the refrigerant circulation system 100 includes a switching valve 16. The switching valve 16 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 switches to communicate with one of the second valve port 162 and the third valve port 163, and the fourth valve port 164 switches to communicate with the other of the second valve port 162 and the third valve port 163. The exhaust port 111 of the compressor 11 communicates with the first valve port 161, and the suction port 112 of the compressor 11 communicates with the fourth valve port 164. The second valve port 162 communicates with the first heat exchanger 12, and the third valve port 163 communicates with the second heat exchanger 13. For example, the air conditioner 1000 is a cooling and heating heat exchanger, the first heat exchanger 12 is an outdoor heat exchanger, and the second heat exchanger 13 is an indoor heat exchanger. In the cooling mode, the first valve port 161 communicates with the second valve port 162, and the third valve port 163 communicates with the fourth valve port 164. When the compressor 11 operates, the refrigerant discharged by the compressor 11 first enters the first heat exchanger 12 used as an outdoor heat exchanger. After throttling, it enters the second heat exchanger 13 used as an indoor heat exchanger, and then returns to the compressor 11. At this time, the temperature of the first heat exchanger 12 used as an outdoor heat exchanger is relatively high, and the temperature of the second heat exchanger 13 used as an indoor heat exchanger is relatively low. The indoor heat exchanger can be used for indoor cooling. In the heating mode, the first valve port 161 communicates with the third valve port 163, and the second valve port 162 communicates with the fourth valve port 164. When the compressor 11 operates, the refrigerant discharged by the compressor 11 first enters the second heat exchanger 13 used as an indoor heat exchanger. After throttling, it enters the first heat exchanger 12 used as an outdoor heat exchanger, and then returns to the compressor 11. At this time, the temperature of the first heat exchanger 12 used as an outdoor heat exchanger is relatively low, and the temperature of the second heat exchanger 13 used as an indoor heat exchanger is relatively high. The indoor heat exchanger can be used for indoor heating.

[0080] In some embodiments, as Figure 1 shown, when the refrigerant circulation system 100 includes the above-mentioned 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.

[0081] As Figure 1 ​As shown, when the air conditioner 1000 is in the cooling mode, the first valve port 161 and the second valve port 162 of the switching valve 16 are in communication, and the third valve port 163 and the fourth valve port 164 are in communication. The compressor 11 compresses the refrigerant into a high-temperature and high-pressure gas and discharges it from the exhaust port 111. The refrigerant enters the switching valve 16 from the first valve port 161 and 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 throttle valve). The first throttling device 14 is fully open and does not play a throttling role, but 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 throttle valve). At this time, the second throttling device 15 plays a throttling role. After flowing out of the second throttling device 15, the refrigerant enters the second heat exchanger 13. After flowing out of the second heat exchanger 13, it enters the switching valve 16 from the third valve port 163 of the switching valve 16 and returns to the compressor 11 in sequence through the fourth valve port 164 and the suction port 112, so as to circulate.

[0082] In the cooling mode of the air conditioner 1000, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 111 is condensed and dissipated heat in the first heat exchanger 12, and 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 play a throttling role, and the second throttling device 15 acts as a throttling element to play a throttling role, the temperature of the refrigerant higher than the ambient temperature remains substantially unchanged after passing through the first throttling device 14, and the refrigerant temperature 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 dissipate heat from the electronic control box 2, and at the same time, it can effectively reduce the probability of condensate generation. The refrigerant throttled by the second throttling device 15 enters the second heat exchanger 13 and evaporates and absorbs heat in the second heat exchanger 13, and finally returns to the compressor 11.

[0083] Thus, in the cooling mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the electronic control box 2, thereby reducing the temperature of the electronic control box 2 and improving the stability of the electronic control box 2. In addition, the refrigerant slightly higher than the ambient temperature is not throttled 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 electronic control box 2, the probability of condensate generation can be effectively reduced, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electronic control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electronic control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electronic control box 2 to improve the heat dissipation efficiency.

[0084] As Figure 1As shown, when the air conditioner 1000 is in the heating mode, the first valve port 161 of the switching valve 16 is in communication with the third valve port 163, and the second valve port 162 is in communication with the fourth valve port 164. The compressor 11 compresses the refrigerant into a high-temperature and high-pressure gas and discharges it from the exhaust port 111. The refrigerant enters the switching valve 16 from the first valve port 161 and 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 play a throttling role, but 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). At this time, the first throttling device 14 plays a throttling role. After flowing out of the first throttling device 14, the refrigerant enters the first heat exchanger 12. After flowing out of the first heat exchanger 12, it enters the switching valve 16 from the second valve port 162 of the switching valve 16, and then returns to the compressor 11 in sequence through the fourth valve port 164 and the suction port 112, thus circulating.

[0085] In the heating mode of the air conditioner 1000, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 111 is condensed and dissipated heat in the second heat exchanger 13, and 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 play a throttling role, and the first throttling device 14 acts as a throttling element to play a throttling role, the temperature of the refrigerant with a temperature higher than the ambient temperature remains basically unchanged after passing through the second throttling device 15, and the refrigerant temperature 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 dissipate heat from the electronic control box 2, and at the same time, it can effectively reduce the probability of condensate generation. The refrigerant throttled by the first throttling device 14 enters the first heat exchanger 12, evaporates and absorbs heat in the first heat exchanger 12, and finally returns to the compressor 11.

[0086] Thus, in the heating mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the electronic control box 2, thereby reducing the temperature of the electronic control box 2 and improving the stability of the electronic control box 2. In addition, the refrigerant slightly higher than the ambient temperature is not throttled 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 electronic control box 2, the probability of condensate generation can be effectively reduced, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electronic control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electronic control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electronic control box 2 to improve the heat dissipation efficiency.

[0087] According to the air conditioner 1000 of the embodiment of the present application, by arranging a series-connected first throttling device 14 and a second throttling device 15 between the first heat exchanger 12 and the 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 conducting 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 conducting device, and the first throttling device 14 functions as a throttling device. In the refrigeration and heating modes of the air conditioner 1000, the refrigerant can dissipate heat from the electric control box 2, thereby reducing the temperature of the electric control box 2. At the same time, the refrigerant slightly higher 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 electric control box 2, the probability of generating condensate water can be effectively reduced, enabling the heat dissipation pipe 3 to be flexibly arranged relative to the electric control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electric control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electric control box 2 to improve the heat dissipation efficiency.

[0088] In addition, in the refrigeration and heating modes of the air conditioner 1000, the circulating refrigerant can all flow through the heat dissipation pipe 3. Since the refrigerant flow rate through the heat dissipation pipe 3 is large, it can achieve a good temperature reduction effect on the electric control box 2, thereby improving the working stability of the electric control box 2 and further improving the service performance of the air conditioner 1000.

[0089] In some embodiments, as Figure 2 shown, when the refrigerant circulation system 100 includes the above-mentioned 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 throttling tube 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, and when the refrigerant flows from the second heat exchanger 13 to the first heat exchanger 12, the first throttling device 14 throttles.

[0090] As Figure 2As shown, when the air conditioner 1000 is in the cooling mode, the first valve port 161 of the switching valve 16 is connected to the second valve port 162, the third valve port 163 is connected to the fourth valve port 164, the compressor 11 compresses the refrigerant into a high-temperature and high-pressure gas and discharges it from the exhaust port 111, the refrigerant enters the switching valve 16 from the first valve port 161, and enters the first heat exchanger 12 through the second valve port 162 of the switching valve 16. After the refrigerant flows out of the first heat exchanger 12, it enters the first throttling device 14 (one-way throttling valve), the first throttling device 14 is fully connected, does not play a throttling role, and only plays the role of a connecting pipe. After flowing out of the first throttling device 14, the refrigerant flows through the heat dissipation pipe 3 and the second throttling device 15 (capillary throttling tube or electronic expansion valve) in sequence and enters the second heat exchanger 13; after flowing out of the second heat exchanger 13, the refrigerant enters the switching valve 16 through the third valve port 163 of the switching valve 16, and returns to the compressor 11 through the fourth valve port 164 and the return air port 112 in sequence.

[0091] In the cooling mode of the air conditioner 1000, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 111 is condensed and dissipated in the first heat exchanger 12, and 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 serves as a connecting pipe at this time, but does not play a throttling role, the temperature of the refrigerant remains substantially unchanged after passing through the first throttling device 14, and the refrigerant temperature 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, the electric control box 2 can be cooled, and the probability of condensed water generation can be effectively reduced. The refrigerant after passing through the electric control box 2 flows through the second throttling device 15, enters the second heat exchanger 13, evaporates and absorbs heat in the second heat exchanger 13, and finally returns to the compressor 11.

[0092] Therefore, in the cooling mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the electric control box 2, thereby reducing the temperature of the electric control box 2 and improving the stability of the electric control box 2. In addition, since the refrigerant is not throttled before flowing into the heat dissipation pipe 3, the refrigerant temperature is slightly higher than the ambient temperature. In the process of the refrigerant flowing through the heat dissipation pipe 3 to dissipate heat from the electric control box 2, the probability of condensed water generation can be effectively reduced, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electric control box 2, for example, the heat dissipation pipe 3 can be arranged outside the electric control box 2 to improve assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electric control box 2 to improve heat dissipation efficiency.

[0093] like Figure 2As shown, when the air conditioner 1000 is in the heating mode, the first valve port 161 of the switching valve 16 is in communication with the third valve port 163, and the second valve port 162 is in communication with the fourth valve port 164. The compressor 11 compresses the refrigerant into a high-temperature and high-pressure gas and discharges it from the exhaust port 111. The refrigerant enters the switching valve 16 from the first valve port 161, and after passing through the third valve port 163 of the switching valve 16, enters the second heat exchanger 13. After flowing out of the second heat exchanger 13, the refrigerant enters the second throttling device 15 (capillary tube or electronic expansion valve) for partial throttling, and then enters the first throttling device 14 (one-way throttling valve) after passing 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, enters the switching valve 16 from the second valve port 162, and then returns to the compressor 11 in sequence through the fourth valve port 164 and the suction port 112.

[0094] In the heating mode of the air conditioner 1000, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 111 is condensed and dissipated 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 its temperature 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 not only dissipate heat from the electronic control box 2, but also effectively reduce the generation probability of condensed water. After passing through the heat dissipation pipe 3, the refrigerant enters the first throttling device 14 for auxiliary throttling, and the refrigerant can complete full throttling after flowing out of the first throttling device 14. 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.

[0095] Thus, in the heating mode of the air conditioner 1000, the refrigerant can effectively dissipate heat from the electronic control box 2 when passing through the heat dissipation pipe 3, thereby reducing the temperature of the electronic control box 2 and improving the stability of the electronic control box 2. In addition, after the refrigerant is partially throttled by the second throttling device 15, the temperature of the refrigerant is lower than the temperature of the refrigerant at the second end of the second heat exchanger 13 and is still higher than the ambient temperature. Therefore, during the process of the refrigerant dissipating heat from the electronic control box 2, the generation probability of condensed water can be effectively reduced, enabling the heat dissipation pipe 3 to be flexibly arranged relative to the electronic control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electronic control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electronic control box 2 to improve the heat dissipation efficiency.

[0096] According to the air conditioner 1000 of the embodiment of the present application, by arranging a first throttling device 14 and a second throttling device 15 between the first heat exchanger 12 and the second heat exchanger 13, the first throttling device 14 is a one-way throttling valve that does not throttle and plays a fully conducting role when the refrigerant flows from the first heat exchanger 12 to the second heat exchanger 13, and throttles and plays an auxiliary throttling role for the second throttling device 15 when the refrigerant flows from the second heat exchanger 13 to the first heat exchanger 12. In the cooling and heating modes of the air conditioner 1000, the refrigerant can dissipate heat from the electronic control box 2, thereby reducing the temperature of the electronic control box 2, improving the working stability of the electronic control box 2, simplifying the structure of the air conditioner 1000, and reducing the production cost. At the same time, since the refrigerant is partially throttled or unthrottled before flowing into the heat dissipation pipe 3, the temperature of the refrigerant 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 electronic control box 2, the probability of generating condensed water can be effectively reduced, so that the heat dissipation pipe 3 can be flexibly arranged relative to the electronic control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electronic control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electronic control box 2 to improve the heat dissipation efficiency.

[0097] In addition, in the cooling and heating modes of the air conditioner 1000, all the circulating refrigerant can pass through the heat dissipation pipe 3. Since the refrigerant flow rate through the heat dissipation pipe 3 is large, it can play a good cooling effect on the electronic control box 2, thereby improving the working stability of the electronic control box 2 and further improving the service performance of the air conditioner 1000.

[0098] In some other embodiments of the present application, the refrigerant circulation system 100 may not include the above-mentioned switching valve 16. At this time, the air conditioner 1000 can be a single-cooling air conditioner or a single-heating air conditioner. Refer to Figure 3, the exhaust port 111 of the compressor 11 is communicated with the first heat exchanger 12, and the suction port 112 of the compressor 11 is communicated with the second heat exchanger 13. For example, the air conditioner 1000 is a single-cooling air conditioner, the first heat exchanger 12 is an outdoor heat exchanger, and the second heat exchanger 13 is an indoor heat exchanger. When the compressor 11 operates, the refrigerant discharged from the compressor 11 first enters the first heat exchanger 12 serving as the outdoor heat exchanger. After throttling, it enters the second heat exchanger 13 serving as the indoor heat exchanger, and then returns to the compressor 11. At this time, the temperature of the first heat exchanger 12 serving as the outdoor heat exchanger is relatively high, and the temperature of the second heat exchanger 13 serving as the indoor heat exchanger is relatively low. The air conditioner 1000 can be used for indoor cooling. Another example is that the air conditioner 1000 is a single-heating air conditioner, the first heat exchanger 12 is an indoor heat exchanger, and the second heat exchanger 13 is an outdoor heat exchanger. When the compressor 11 operates, the refrigerant discharged from the compressor 11 first enters the first heat exchanger 12 serving as the indoor heat exchanger. After throttling, it enters the second heat exchanger 13 serving as the outdoor heat exchanger, and then returns to the compressor 11. At this time, the temperature of the first heat exchanger 12 serving as the indoor heat exchanger is relatively high, and the temperature of the second heat exchanger 13 serving as the outdoor heat exchanger is relatively low. The air conditioner 1000 can be used for indoor heating.

[0099] Reference Figure 3 , in some embodiments, when the refrigerant circulation system 100 does not include the above-mentioned switching valve 16, and the exhaust port 111 of the compressor 11 is communicated with the first heat exchanger 12, and the suction port 112 of the compressor 11 is communicated with the second heat exchanger 13, the first throttling device 14 is a capillary throttling tube or an electronic expansion valve or a one-way throttling valve, and the second throttling device 15 is a capillary throttling tube or an electronic expansion valve or a one-way throttling valve. That is, while the first throttling device 14 selects any one from a capillary throttling tube, an electronic expansion valve, and a one-way throttling valve, the second throttling device 15 selects any one from a capillary throttling tube, 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 throttles partially, and the second throttling device 15 throttles assistingly. That is, after the refrigerant is partially throttled by the first throttling device 14, although it is throttled but does not meet the condition for entering the second heat exchanger 13. When the refrigerant is further throttled assistingly by the second throttling device 15, it meets the condition for entering the second heat exchanger 13.

[0100] In this way, when the compressor 11 operates, 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 refrigerant with reduced temperature enters the heat dissipation pipe 3. The heat dissipation pipe 3 can dissipate heat from the electronic control box 2, thereby reducing the temperature of the electronic control box 2 and improving the working stability of the electronic control box 2. After that, 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. Among them, since the refrigerant is partially throttled before flowing into the heat dissipation pipe 3, the temperature of the refrigerant 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 electronic control box 2, the probability of generating condensed water can be effectively reduced, enabling the heat dissipation pipe 3 to be flexibly arranged relative to the electronic control box 2. For example, the heat dissipation pipe 3 can be arranged outside the electronic control box 2 to improve the assembly convenience, or the heat dissipation pipe 3 can be arranged inside the electronic control box 2 to improve the heat dissipation efficiency.

[0101] In addition, all the circulating refrigerant can pass through the heat dissipation pipe 3. Since the refrigerant flow rate through the heat dissipation pipe 3 is large, it can achieve a good temperature reduction effect on the electronic control box 2, thereby improving the working stability of the electronic control box 2 and further improving the service performance of the air conditioner 1000.

[0102] Reference Figure 4 , in some embodiments, the electronic control box 2 includes a sealed box body 21 and a circuit board 22 arranged inside the box body 21. The heat dissipation pipe 3 penetrates through the box body 21 so that at least a part of the heat dissipation pipe 3 is located inside the box body 21. Thus, by penetrating the heat dissipation pipe 3 through the box body 21 so that at least a part of the heat dissipation pipe 3 is located inside the box body 21, the heat released by the circuit board 22 inside the box body 21 can be transferred to the heat dissipation pipe 3 more quickly, thereby improving the heat dissipation efficiency of the electronic control box 2.

[0103] Among them, the circuit board 22 may include a substrate 221 and devices arranged on the substrate 221. The devices include heat-generating devices, such as passive devices (such as capacitors and inductors), power devices (such as rectifier bridges, IGBTs, diodes, IPMs), etc. When the circuit board 22 operates, the heat-generating devices will release heat. "The box body 21 is sealed" means that the box body 21 does not have ventilation structures such as ventilation holes, and there is no air flow between the space inside the box body 21 and the space outside the box body 21. The joints and wiring parts of the box body 21 are sealed.

[0104] The manner in which the heat dissipation pipe 3 absorbs the heat released by the heat-generating devices is not limited. For example, it can be transferred through solid media, gas media, etc. For example, in some embodiments, the electronic control box 2 includes a first heat dissipation structure 23. The first heat dissipation structure 23 is arranged inside the box body 21. The box body 21 includes a first box cover 211. The first box cover 211 covers the first heat dissipation structure 23. A part of the heat dissipation pipe 3 extends into the box body 21 and is in heat transfer cooperation with the first heat dissipation structure 23. The first heat dissipation structure 23 is spaced between the heat dissipation pipe 3 and the circuit board 22.

[0105] For example, referring to Figure 4 , the first heat dissipation structure 23 can be connected to the first lid 211 or the circuit board 22. Through a solid medium such as the first heat dissipation structure 23, the heat of the circuit board 22 is transferred to the heat dissipation pipe 3. The first heat dissipation structure 23 can absorb the heat released by the heating devices on the circuit board 22 in a larger range and more fully. Through the heat transfer cooperation between the heat dissipation pipe 3 and the first heat dissipation structure 23, the heat dissipation pipe 3 can dissipate heat from the electronic control box 2 more efficiently through the first heat dissipation structure 23, improving the heat dissipation efficiency of the electronic control box 2. For example, the first heat dissipation structure 23 can be made of materials such as metal or graphite, so that the first heat dissipation structure 23 can have better heat conduction ability.

[0106] Moreover, since the first heat dissipation structure 23 is spaced between the heat dissipation pipe 3 and the circuit board 22, the heat dissipation pipe 3 and the circuit board 22 do not directly contact. In this way, the heat released by the parts of the heating devices that are not directly opposite to the heat dissipation pipe 3 can also be transferred to the heat dissipation pipe 3 through the first heat dissipation structure 23, improving the temperature uniformity of the first heat dissipation structure 23, enabling the heat dissipation pipe 3 to absorb the heat of the circuit board 22 more fully and comprehensively through the first heat dissipation structure 23, and improving the heat dissipation efficiency; moreover, it can prevent the problem of condensate formation due to the direct contact between the high-temperature heating devices and the low-temperature refrigerant pipes, improving the working reliability of the circuit board 22; and it can avoid the risk of explosion caused by the leakage of the heat dissipation pipe 3 and direct contact with the circuit board 22, improving the working reliability of the circuit board 22.

[0107] Referring to Figure 4 , in some embodiments, the first heat dissipation structure 23 includes a first radiator 231. A first pipe groove 2311 is formed on the first radiator 231. The first pipe groove 2311 opens towards the direction of the first lid 211. The heat dissipation pipe 3 is embedded in the first pipe groove 2311 and is clamped between the first lid 211 and the first radiator 231. Exemplarily, the first radiator 231 can be assembled and connected to the first lid 211, or exemplarily, the first radiator 231 can also be installed on the circuit board 22.

[0108] Thus, 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, enabling the heat dissipation pipe 3 to absorb heat more fully and improving the heat dissipation efficiency of the electronic control box 2. Moreover, by providing the first pipe groove 2311 on the first radiator 231 that opens towards the direction of the first lid 211 and clamping the heat dissipation pipe 3 between the first lid 211 and the first radiator 231, the installation efficiency of the heat dissipation pipe 3 can be improved, facilitating the assembly of the heat dissipation pipe 3. 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 to the first pipe groove 2311.

[0109] Reference Figure 4 In some embodiments, the first heat dissipation structure 23 includes a second radiator 232. The second radiator 232 includes a first part 2321 and a second part 2322. One of the first part 2321 and the second part 2322 has a second tube groove 2323 that is open in the direction towards the other. The heat dissipation tube 3 is embedded in the second tube groove 2323 and is clamped between the first part 2321 and the second part 2322. Exemplarily, the first part 2321 and the second part 2322 can be assembled and connected, and one of them is assembled and connected to the first lid 211 or installed on the circuit board 22. Or, exemplarily, one of the first part 2321 and the second part 2322 is assembled and connected to the first lid 211, and the other is installed on the circuit board 22.

[0110] Thus, by embedding the heat dissipation tube 3 in the second tube groove 2323, the contact area between the heat dissipation tube 3 and the second radiator 232 can be increased, so that the heat dissipation tube 3 can absorb heat more fully, improving the heat dissipation efficiency of the electronic control box 2. Moreover, by having a second tube groove 2323 that is open in the direction towards the other on one of the first part 2321 and the second part 2322 and clamping the heat dissipation tube 3 between the first part 2321 and the second part 2322, the installation efficiency of the heat dissipation tube 3 can be improved, facilitating the assembly of the heat dissipation tube 3. For example, the heat dissipation tube 3 can be assembled with the refrigeration cycle system where the compressor 11 is located, and then one end of the refrigerant tube is pulled out as the heat dissipation tube 3 and assembled to the second tube groove 2323.

[0111] Of course, the present application is not limited thereto. For example, in other embodiments of the present application, through holes that are open at both ends in length can also be formed on the first heat dissipation structure 23, and the heat dissipation tube 3 is installed in the through holes formed on the first heat dissipation structure 23 by means such as expanding the tube.

[0112] Among them, the number of the first heat dissipation structures 23 is not limited and can be one or more. For example, in some embodiments, such as Figure 4As shown, the circuit board 22 includes a substrate 221, a first heating device 222 and a second heating device 223 disposed on the substrate 221. Both the first heating device 222 and the second heating device 223 are disposed on one side of the substrate 221 facing the first lid 211. A first heat dissipation structure 23 is interposed between the first lid 211 and the first heating device 222, and a first heat dissipation structure 23 is also interposed between the first lid 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, so as to avoid the thermal influence between the two first heating devices 222 and the second heating device 223. Exemplarily, there is one heat dissipation tube 3, and the heat dissipation tube 3 includes two tube segments connected in series. The two tube segments respectively correspond to and cooperate with the two first heat dissipation structures 23, so as to further simplify the structure. That is, when the refrigerant flows through the heat dissipation tube 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.

[0113] In some embodiments of the present application, the first heat dissipation structure 23 may include a convex structure extending in the direction towards the circuit board 22. The convex structures may be multiple and spaced apart. Thus, by providing the convex structure, on the one hand, the contact area between the first heat dissipation structure 23 and the air in the box body 21 can be increased to increase the heat dissipation efficiency, and 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 increasing the heat dissipation efficiency. The shape of the convex structure is not limited. For example, it may be sheet-shaped or column-shaped, etc.

[0114] Exemplarily, at least part of the convex structure is correspondingly disposed with the heat dissipation tube 3. Thus, the heat absorbed by the convex structure can be transferred to the heat dissipation tube 3 more quickly, thereby increasing the heat dissipation efficiency.

[0115] Refer to Figure 4 , in some embodiments, the first heat dissipation structure 23 and the circuit board 22 transfer heat through a heat conduction medium 24. Thus, through the heat conduction medium 24, the first heat dissipation structure 23 and the circuit board 22 indirectly transfer heat, making the heat dissipation more efficient and improving the heat dissipation efficiency of the electronic control box 2. For example, the heat conduction medium 24 may include at least one of heat conduction metal, heat conduction silicone grease, heat conduction silica gel, heat conduction rubber pad, etc. Exemplarily, when the first heat dissipation structure 23 includes a convex structure extending in the direction towards the circuit board 22, the convex structure and the circuit board 22 transfer heat through the heat conduction medium 24.

[0116] Refer to Figure 5 and Figure 6, in some embodiments, the electronic control box 2 includes a sealed box body 21 and a circuit board 22 disposed inside the box body 21, and the heat dissipation pipe 3 is located outside the box body 21. Thus, by disposing the heat dissipation pipe 3 outside the sealed box body 21, the risk of accidental leakage of the heat dissipation pipe 3, causing the refrigerant to enter the box body 21 and come into contact with the circuit board 22 and explode, can be avoided, thereby improving the safety of the electronic control box 2.

[0117] Among them, 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 (such as capacitors and inductors), power devices (such as rectifier bridges, IGBTs, diodes, IPMs), etc. When the circuit board 22 operates, the heat generating devices will release heat. "The box body 21 is airtight" means that the box body 21 does not have a ventilation structure such as a ventilation hole, and the space inside the box body 21 and the space outside the box body 21 do not have air flow, and parts such as the splicing and wiring parts of the box body 21 are sealed.

[0118] Reference Figure 5 and Figure 6 , in some embodiments, the electronic control box 2 includes a second heat dissipation structure 26. The inner end of the second heat dissipation structure 26 absorbs heat inside the box body 21, and the heat dissipation pipe 3 outside the box body 21 is in heat transfer cooperation with the second heat dissipation structure 26. In this way, the second heat dissipation structure 26 can absorb the heat inside the box body 21 and transfer the heat to the heat dissipation pipe 3 outside the box body 21, thereby achieving the effect of dissipating heat from the electronic control box 2. For example, the first heat dissipation structure 23 can be made of materials such as metal or graphite, so that the first heat dissipation structure 23 can have better heat conduction ability.

[0119] Reference Figure 7 , in some embodiments, a third pipe groove 261 that opens in a direction away from the box body 21 is formed on the outer surface of the second heat dissipation structure 26, and the heat dissipation pipe 3 is embedded in the third pipe groove 261. Thus, by embedding the heat dissipation pipe 3 in the third pipe groove 261, the contact area between the heat dissipation pipe 3 and the second heat dissipation structure 26 can be increased, so that the heat dissipation pipe 3 can absorb heat more fully, improving the heat dissipation efficiency of the electronic control box 2. Moreover, by providing the third pipe groove 261 that opens in a direction away from the box body 21 on the second radiator 232, the installation efficiency of the heat dissipation pipe 3 can be improved, facilitating the assembly of the heat dissipation pipe 3. 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 to the third pipe groove 261.

[0120] Of course, the present application is not limited to this. For example, in other embodiments of the present application, through holes that are open at both ends in length may also be formed on the second heat dissipation structure 26, and the heat dissipation pipe 3 is installed in the through holes formed on the second heat dissipation structure 26 by means such as expanding the pipe.

[0121] In some embodiments, a gland 27 is installed on the outer side of the second heat dissipation structure 26, and the gland 27 and the second heat dissipation structure 26 sandwich the heat dissipation pipe 3. Thus, by providing the gland 27, the cooperation stability between the heat dissipation pipe 3 and the second heat dissipation structure 26 can be improved, and the heat dissipation reliability of the electronic control box 2 can be enhanced.

[0122] Exemplarily, a fourth pipe groove 271 that mates with the third pipe groove 261 may be formed on the gland 27, and the heat dissipation pipe 3 is also embedded in the fourth pipe groove 271 at the same time, thereby improving the limiting stability of the gland 27 with respect to the heat dissipation pipe 3.

[0123] Exemplarily, the gland 27 is assembled and connected to the second heat dissipation structure 26, facilitating the fixed installation of the gland 27. However, the present application is not limited thereto. For example, the gland 27 may also be arranged to be connected to the box body 21 or the like.

[0124] Exemplarily, the box body 21 includes a first box cover 211, and the second heat dissipation structure 26 is provided corresponding to the first box cover 211. Among them, the cooperation relationship between the second heat dissipation structure 26 and the first box cover 211 is not limited, and the following examples will describe it.

[0125] In some embodiments, in combination Figure 7 , the box body 21 includes a first box cover 211. The first box cover 211 is made of a non-metallic material and has a through-opening area 2111 thereon, and the second heat dissipation structure 26 is sealed at the opening area 2111. Thus, by providing the first box cover 211 made of a non-metallic material and providing the opening area 2111 on the non-metallic first box cover 211, and being sealed by the second heat dissipation structure 26 with better thermal conductivity, both the heat dissipation requirements can be met, and the use of metal materials can be saved, reducing the weight and cost of the box body 21.

[0126] Specifically, when "the box body 21 includes a first box cover 211, the first box cover 211 is made of a non-metallic material and has a through-opening area 2111 thereon, and the second heat dissipation structure 26 is sealed at the opening area 2111", the second heat dissipation structure 26 also has various installation schemes. For example, in some embodiments, the second heat dissipation structure 26 may be integrally connected to the first box cover 211. Or, in some other embodiments, the second heat dissipation structure 26 is assembled and connected to the first box cover 211. Or, in some other embodiments, the second heat dissipation structure 26 is installed on the circuit board 22 and passes through the opening area 2111.

[0127] Among them, when the second heat dissipation structure 26 is integrally connected to the first lid 211, the connection between the second heat dissipation structure 26 and the first lid 211 can be achieved without subsequent assembly steps, improving the assembly efficiency. Moreover, the sealing performance at the connection between the second heat dissipation structure 26 and the first lid 211 is easier to control, enhancing the safety of the electronic control box 2. Additionally, the second heat dissipation structure 26 can be more reliably and stably connected to the first lid 211, improving the reliability of heat dissipation. The manner of integrally connecting the second heat dissipation structure 26 to the first lid 211 is not limited. For example, when the first lid 211 is a plastic part, the second heat dissipation structure 26 can be disposed in the molding die of the first lid 211 and integrally injection-molded to the first lid 211, or the second heat dissipation structure 26 can also be connected to the first lid 211 by means such as pasting or welding.

[0128] Among them, when the second heat dissipation structure 26 is assembled and connected to the first lid 211, the second heat dissipation structure 26 can be fixed to the first lid 211 by means such as snap connection, threaded connection, riveting, etc., thereby simplifying the processing of the first lid 211. Moreover, by assembling and connecting the second heat dissipation structure 26 to the first lid 211, it is beneficial to seal the opening area 2111.

[0129] Among them, when the second heat dissipation structure 26 is installed 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 beneficial for the circuit board 22 to transfer heat to the second heat dissipation structure 26 more fully. Moreover, the setting of the second heat dissipation structure 26 does not exert pressure on the first lid 211, and the volume of the second heat dissipation structure 26 can be flexibly set, facilitating the improvement and optimization of the heat transfer effect of the second heat dissipation structure 26.

[0130] Among them, the number of the opening areas 2111 is not limited and can be one or more. For example, in some embodiments, such as Figure 10As shown, the circuit board 22 includes a substrate 221, a first heating device 222 and a second heating device 223 disposed on the substrate 221. Both the first heating device 222 and the second heating device 223 are disposed on one side of the substrate 221 facing the first lid 211. The first lid 211 has two opening areas 2111, which are respectively arranged corresponding to the first heating device 222 and the second heating device 223. A second heat dissipation structure 26 is arranged in each opening area 2111. Each second heat dissipation structure 26 can be fixed by any one of the following methods: "the second heat dissipation structure 26 can be integrally connected to the first lid 211", "the second heat dissipation structure 26 is assembled and connected to the first lid 211", and "the second heat dissipation structure 26 is installed on the circuit board 22 and passes through the opening area 2111". Thus, by providing multiple opening areas 2111, the metal material used for the box body 21 can be further reduced, and the weight and cost of the box body 21 can be further reduced. Exemplarily, there is one heat dissipation tube 3 and the heat dissipation tube 3 includes two tube segments connected in series. The two tube segments respectively cooperate with the two second heat dissipation structures 26, so that the structure can be further simplified, that is, when the refrigerant flows through the heat dissipation tube 3, it can first exchange heat with one of the second heat dissipation structures 26, and then exchange heat with the other second heat dissipation structure.

[0131] A first heat dissipation structure 23 is interposed between the first heating device 222, and a first heat dissipation structure 23 is also interposed between the first lid 211 and the second heating device 223. The first heat dissipation structures 23 at these two places are arranged at intervals. Each first heat dissipation structure 23 can be either the first radiator 231 or the second radiator 232, so as to avoid the thermal influence between the two first heating devices 222 and the second heating device 223. There is one heat dissipation tube 3 and the heat dissipation tube 3 includes two tube segments connected in series. The two tube segments respectively cooperate with the two first heat dissipation structures 23, so that the structure can be further simplified, that is, when the refrigerant flows through the heat dissipation tube 3, it can first exchange heat with one of the first heat dissipation structures 23, and then exchange heat with the other first heat dissipation structure.

[0132] In some other embodiments of the present application, in combination with Figure 8 and Figure 9, the first box cover 211 can also be made of metal, and the second heat dissipation structure 26 is a part of the first box cover 211. At this time, the box body 21 can also include a second box cover 212. The second box cover 212 includes an end plate 2121 and a surrounding plate 2122. The surrounding plate 2122 is arranged around the end plate 2121 to form a receiving cavity for receiving the circuit board 22 between the end plate 2121 and the surrounding plate 2122. One end of the surrounding plate 2122 away from the end plate 2121 defines an opening. The first box cover 211 is arranged 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, using a part of the entire metal first box cover 211 as the second heat dissipation structure 26 can simplify the overall structure of the electronic control box 2, reduce the assembly complexity, and is beneficial to dissipating heat in a larger range and improving the heat dissipation efficiency.

[0133] In some embodiments of the present application, in combination with Figure 6 and Figure 7 , the second heat dissipation structure 26 includes a heat dissipation part 262 extending in the direction towards the circuit board 22. The heat dissipation part 262 includes a plurality of heat dissipation units 2621 arranged at intervals. Thus, by providing the heat dissipation part 262, on the one hand, the contact area between the second heat dissipation structure 26 and the air in the box body 21 can be increased to increase the heat dissipation efficiency, and on the other hand, the distance between the second heat dissipation structure 26 and the circuit board 22 can be shortened, thereby enhancing the heat absorption effect on the circuit board 22 and further improving the heat dissipation efficiency. Among them, the shape of the heat dissipation unit 2621 is not limited. For example, it can be in the shape of a heat sink, or can be in the shape of a heat projection, or can be in the shape of a heat column. The heat column can be a cylinder, a prism, a conical column, etc. For example, the heat dissipation unit 2621 is a conical column and its cross-sectional area gradually decreases in the direction towards the circuit board 22.

[0134] Exemplarily, in combination with Figure 7 , at least part of the heat dissipation part 262 is arranged corresponding to the heat dissipation tube 3. Thus, the heat absorbed by the heat dissipation part 262 can be transferred to the heat dissipation tube 3 more quickly, thereby improving the heat dissipation efficiency.

[0135] Exemplarily, the second heat dissipation structure 26 and the circuit board 22 transfer heat by contacting through a heat conduction medium 24. Thus, through the heat conduction medium 24, the second heat dissipation structure 26 and the circuit board 22 transfer heat indirectly in contact, making the heat dissipation more efficient and improving the heat dissipation efficiency of the electronic control box 2. For example, the heat conduction medium 24 can include at least one of a heat conductive metal, a heat conductive silicone grease, a heat conductive silica gel, a heat conductive rubber 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 transfer heat by contacting through a heat conduction medium 24.

[0136] In some embodiments of the present application, in combination with Figure 6 and Figure 7, when the outer surface of the second heat dissipation structure 26 is formed with a third pipe groove 261 that opens in a direction away from the box body 21, the heat dissipation pipe 3 is embedded in the third pipe groove 261, and when the first box cover 211 made of a non-metallic material has an opening area 2111, a limit buckle 2112 that is clamped and matched with the heat dissipation pipe 3 can be arranged on the first box cover 211. Thus, it is beneficial to improve the assembly efficiency of the heat dissipation pipe 3, improve the assembly stability of the heat dissipation pipe 3, and is beneficial to the subsequent assembly of the gland 27. In addition, in some other embodiments, by arranging the limit buckle 2112, the gland 27 can also be omitted as needed, thereby reducing the weight and cost.

[0137] Exemplarily, in combination with Figure 6 and Figure 7 , limit buckles 2112 can be respectively arranged at both length ends of the third pipe groove 261. In this way, when a pipe section of the heat dissipation pipe 3 is matched with the third pipe groove 261, the limit buckles 2112 at both length ends of the third pipe groove 261 can be used for cooperation to improve the cooperation stability between the heat dissipation pipe 3 and the third pipe groove 261.

[0138] It should be noted that on the premise of no contradiction, the first box cover 211 and the second box cover 212 in any of the above embodiments can be combined with the following embodiments to achieve the sealed design of the box body 21.

[0139] In some embodiments, in combination with Figure 5 and Figure 6 , when the box body 21 includes a first box cover 211 and a second box cover 212, the first box cover 211 and the second box cover 212 are arranged along the plate thickness direction of the circuit board 22 and cover each other, and a circumferential sealing fit is formed at the joint of the first box cover 211 and the second box cover 212. Thus, the structure of the box body 21 is simple, which is convenient for the assembly of the circuit board 22 and is beneficial to realizing the sealing of the box body 21. For example, the circuit board 22 can be pre-installed on the first box cover 211 or the second box cover 212, and then the first box cover 211 and the second box cover 212 are covered. Exemplarily, the first box cover 211 and the second box cover 212 can be connected by clamping and / or by threaded connectors, etc., so as to achieve rapid assembly.

[0140] For example, in some embodiments, a sealing ring fitted between the first lid 211 and the second lid 212 can be used to achieve a circumferential sealing fit at the joint between the first lid 211 and the second lid 212. Also, for example, in some other embodiments, a first sealing structure 2113 is integrally formed at the edge of the first lid 211, and a second sealing structure 2123 is integrally formed at the edge of the second lid 212. The first sealing structure 2113 and the second sealing structure 2123 form a circumferential sealing fit through shape matching. Thus, the sealing ring can be omitted to avoid leakage problems caused by the failure of the sealing ring. Further, for example, in some other embodiments, while using the cooperation of the first sealing structure 2113 and the second sealing structure 2123 to achieve sealing, a sealing ring can also be used to achieve further sealing.

[0141] In some embodiments, in combination Figure 11 and Figure 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 insertion 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 insertion plate 21231 inserted into the groove 21132. Thus, the structures of the first sealing structure 2113 and the second sealing structure 2123 are simple, facilitating processing and assembly, and having a good sealing effect.

[0142] In some embodiments, in combination Figure 13 and Figure 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 are sealingly fitted by stepped reverse buckling. For example, one of the first sealing structure 2113 and the second sealing structure 2123 includes a first-stage stepped bottom plate 21133 and a first-stage stepped inner side plate 21134. The first-stage stepped inner side plate 21134 extends upward relative to the first-stage stepped bottom plate 21133, and the first-stage stepped inner side plate 21134 is located on the side of the first-stage stepped bottom plate 21133 close to the inside of the box body 21. The other of the first sealing structure 2113 and the second sealing structure 2123 includes a first-stage stepped top plate 21233 and a first-stage stepped outer side plate 21234. The first-stage stepped outer side plate 21234 extends downward relative to the first-stage stepped top plate 21233, and the first-stage stepped outer side plate 21234 is located on the side of the first-stage stepped top plate 21233 close to the outside of the box body 21. The first-stage stepped outer side plate 21234 is located on the side of the first-stage stepped inner side plate 21134 far from the inside of the box body 21. The first-stage stepped bottom plate 21133 abuts against the bottom of the first-stage stepped outer side plate 21234, and the first-stage stepped top plate 21233 abuts against the top of the first-stage stepped inner side plate 21134. Thus, the structures of the first sealing structure 2113 and the second sealing structure 2123 are simple, which is convenient for processing and assembly, and the sealing effect is good. It should be noted that the "top" and "bottom" directions described in this article refer to the directions shown in the figure. When the electric control box 2 is installed and used, the "top" and "bottom" directions of the electric control box 2 are not limited to those shown in the figure. For example, the electric control box 2 shown in the figure can be installed upright, inverted or vertically.

[0143] In some embodiments, as Figure 15 and Figure 16 shown, the closed box body 21 has an installation opening 214, and the electric control box 2 further includes a wire threading structure 28. The wire threading structure 28 is sealed at the installation opening 214, and the wire threading structure 28 defines a wire threading pore 281. Thus, the sealing requirements at the wire threading place can be met. For example, when the box body 21 includes the above-mentioned first box cover 211 and second box cover 212 that are mutually covered, the installation opening 214 can be formed on one of the first box cover 211 and the second box cover 212, or formed between the first box cover 211 and the second box cover 212.

[0144] Exemplarily, the wire threading structure 28 is fixedly clamped with the box body 21 at the installation opening 214, for example, inserted into a card slot, so as to improve the assembly efficiency of the wire threading structure 28. For example, in combination with Figure 19 , the wire threading structure 28 has a reverse buckling structure 283, and the box body 21 has a snap structure located at the installation opening 214. The reverse buckling structure 283 can extend into the snap structure along the assembly direction, but cannot be pulled out reversely.

[0145] Exemplarily, in combination with Figure 16The "thread-passing pore 281" can be formed into a perforated structure that penetrates the thread-passing structure 28 along the extending direction of the wire body 4, so that sealing can be simply achieved through the interference fit between the perforation and the wire body 4. Alternatively, by way of example, in combination with Figure 18 and Figure 19 , the "thread-passing pore 281" can also be formed into a clearance structure that not only penetrates the thread-passing structure 28 along the extending direction of the wire body 4 but also penetrates the thread-passing structure 28 along the radial direction of the wire body 4, so that the wire body 4 can be snapped into the thread-passing pore 281 along the radial direction. In this way, the end of the wire body 4 with the connector can also be easily fitted with the thread-passing structure 28, thus improving the convenience of assembly.

[0146] In some embodiments, in combination with Figure 17 and Figure 18 , the box body 21 is provided with a wiring operation port 215. The installation port 214 is located at the edge position of the wiring operation port 215. The thread-passing structure 28 is embedded in the installation port 214. The box body 21 assembly further includes an operation port cover plate 29. The operation port cover plate 29 is installed on the box body 21 and covers the wiring operation port 215 and the thread-passing structure 28. Thus, after the wire body 4 is fitted with the thread-passing structure 28, the connector on the wire body 4 can be connected to the circuit board 22 through the wiring operation port 215, so that the box body 21 can be pre-assembled before wiring, thus facilitating the overall assembly and wiring of the electric control box 2. In addition, the operation port cover plate 29 can be set to be detachably connected to the box body 21. Thus, when the operation port cover plate 29 is removed from the box body 21, maintenance and the like can also be carried out through the wiring operation port 215, which is convenient for later maintenance.

[0147] In some embodiments, in combination with Figure 18 - Figure 20 , the thread-passing pore 281 can penetrate the thread-passing structure 28 in the direction towards the operation port cover plate 29 and penetrate the thread-passing structure 28 along the direction parallel to the operation port cover plate 29. The wire body 4 passes through the thread-passing structure 28 by expanding the thread-passing pore 281 from the operation port cover plate 29 to the box body 21. The operation port cover plate 29 is provided with a convex portion 291 extending towards the inside of the box body. The convex portion 291 extends into the thread-passing pore 281. Thus, the wire body 4 can be snapped into the thread-passing pore 281 along the radial direction of the wire body 4, which is convenient for the assembly of the wire body 4 with the connector at the end and the thread-passing structure 28. And by providing the convex portion 291 extending towards the inside of the box body on the operation port cover plate 29 to seal the expanded thread-passing pore 281, the sealing performance can be improved on the premise of relatively simple structure.

[0148] Exemplarily, the threading structure 28 may further have a hollow hole 282 penetrating in the direction towards the operation port cover plate 29. By providing the hollow hole 282, it is beneficial to the opening of the threading gap 281, as well as the weight reduction and cost reduction of the threading structure 28. At this time, the convex portion 291 may also be provided to extend into the hollow hole 282, so as to further improve the sealing performance on the premise of relatively simple structure.

[0149] When the air conditioner uses flammable and explosive refrigerants such as R290, since the refrigerant may burn and explode when encountering low-energy sparks at low concentrations, from a safety perspective, the electronic control box is set in a sealed form to reduce the explosion risk. However, devices such as inductors, IGBTs, FRDs, and IPMs on the electronic control board generate a large amount of heat. In high-temperature situations, it is more difficult for the sealed electronic control box to dissipate heat, and the heat accumulates in the electronic control box, causing the temperature of the devices in the electronic control box to rise, resulting in a decline in the reliability of the electronic control box.

[0150] Considering the air-cooled heat dissipation method (that is, large-sized devices are attached to large radiator sheets, and the radiator is cooled by air), the air convection effect is relatively poor, and it is difficult to quickly remove the heat of the electronic control box in a high-temperature environment, resulting in the air conditioner needing to operate at a reduced frequency to reduce the heat generation of the electronic control box, which affects the refrigeration effect of the air conditioner. Moreover, air-cooled heat dissipation only dissipates heat from some heat-generating devices that are easy to attach to the radiator, and cannot dissipate heat well for sealed cavities and other high-power devices such as PFC inductors and electrolytic capacitors.

[0151] Therefore, for the air conditioner according to the embodiments of the present application, the first box cover and the second box cover are coupled to each other to form a sealed box body, reducing the explosion risk and improving the reliability of the air conditioner. At the same time, timely heat dissipation is achieved through the cooperation of the electronic 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 electronic control box but also reduces the risk of condensation, solving the problem that the air conditioner is limited in operation under high-temperature conditions.

[0152] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0153] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0154] In this application, unless otherwise clearly specified or limited, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0155] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely means that the first feature has a lower horizontal height than the second feature.

[0156] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0157] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of this application, and the scope of this application is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that, Comprising: 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 exhaust port of the compressor is communicated with one of the first heat exchanger and the second heat exchanger, the suction port of the compressor is communicated with the other of the first heat exchanger and the second heat exchanger, and the first throttling device and the second throttling device are connected in series between the first heat exchanger and the second heat exchanger along the direction from the first heat exchanger to the second heat exchanger. An electronically controlled heat dissipation component, including an electronic control box and a heat dissipation pipe. The electronic control box is of a closed structure, and the heat dissipation pipe is connected in series between the first throttling device and the second throttling device and is in heat transfer cooperation with the electronic control box.

2. The air conditioner according to claim 1, wherein, The refrigerant circulation system includes a switching valve. The switching valve 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 communicate with one of the second valve port and the third valve port, the fourth valve port is switched to communicate with the other of the second valve port and the third valve port. The exhaust port of the compressor is communicated with the first valve port, the suction port of the compressor is communicated with the fourth valve port, the second valve port is communicated with the first heat exchanger, and the third valve port is communicated with 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 for throttling when the refrigerant flows from the second heat exchanger to the first heat exchanger, and the second throttling device is used for throttling when the refrigerant 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 and is used for throttling when the refrigerant flows from the second heat exchanger to the first heat exchanger, and the second throttling device is a capillary throttling tube or an electronic expansion valve.

5. The air conditioner according to claim 1, characterized in that The exhaust port of the compressor is communicated with the first heat exchanger, and the suction port of the compressor is communicated with the second heat exchanger.

6. The air conditioner according to claim 5, characterized in that, The first throttling device is a capillary throttling tube or an electronic expansion valve or a one-way throttling valve, and the second throttling device is a capillary throttling tube or 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 throttles partially, and the second throttling device throttles assistingly.

7. The air conditioner according to any one of claims 1-6, characterized in that, The electronic control box includes a closed box body and a circuit board arranged in the box body. The heat dissipation pipe penetrates through the box body so that at least part of the heat dissipation pipe is located inside the box body.

8. The air conditioner according to claim 7, characterized in that, The electronic control box includes a first heat dissipation structure. The first heat dissipation structure is arranged in the box body. The box body includes a first box cover, and the first box cover covers the first heat dissipation structure. At least part of the heat dissipation pipe extending into the box body is in heat transfer cooperation with the first heat dissipation structure, and the first heat dissipation structure is spaced between the heat dissipation pipe and the circuit board.

9. The air conditioner according to claim 8, characterized in that The first heat dissipation structure includes a first radiator. A first pipe groove is formed on the first radiator. The first pipe groove opens towards the direction of the first box cover. The heat dissipation pipe is embedded in the first pipe groove and is clamped between the first box cover and the first radiator.

10. The air conditioner according to claim 8, characterized in that, The first heat dissipation structure includes a second radiator, the second radiator includes a first part and a second part, one of the first part and the second part has a second tube groove opening towards the other, the heat dissipation tube is embedded in the second tube groove and is clamped between the first part and the second part.

11. The air conditioner according to claim 8, characterized in that, The first heat dissipation structure and the circuit board transfer heat through a heat-conducting medium.

12. The air conditioner according to any one of claims 1-6, characterized in that, The electric control box includes a sealed box body and a circuit board arranged in the box body. The electric control box includes a second heat dissipation structure. The inner end of the second heat dissipation structure absorbs heat in the box body, and the heat dissipation tube is located outside the box body and is in heat transfer cooperation with the second heat dissipation structure.

13. The air conditioner according to claim 12, wherein A third tube groove opening towards the direction away from the box body is formed on the outer surface of the second heat dissipation structure, and the heat dissipation tube is embedded in the third tube groove.

14. The air conditioner according to claim 13, characterized in that, A gland is installed on the outer side of the second heat dissipation structure, and the gland and the second heat dissipation structure clamp the heat dissipation tube.

15. The air conditioner according to claim 12, characterized in that, The box body includes a first box cover. The first box cover is made of a 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, A third tube groove opening towards the direction away from the box body is formed on the outer surface of the second heat dissipation structure, the heat dissipation tube is embedded in the third tube groove, and the first box cover has a limit buckle that is in snap-fit with the heat dissipation tube.

17. The air conditioner according to claim 12, characterized in that, The box body includes a first box cover and a second box cover. The second box cover includes an end plate and a surrounding plate. The surrounding plate is arranged around the end plate to form a receiving cavity for receiving the circuit board between the end plate and the surrounding plate. One end of the surrounding plate away from the end plate defines an opening. The first box cover is arranged 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 box cover is made of a metal material, and the second heat dissipation structure is a part of the first box cover.

18. The air conditioner according to claim 12, wherein, The second heat dissipation structure includes a heat dissipation part extending towards the circuit board. The heat dissipation part includes a plurality of heat dissipation units arranged at intervals.

19. The air conditioner according to claim 1, characterized in that, The electric control box includes a sealed box body and a circuit board arranged in the box body. The box body includes a first box cover and a second box cover. The first box cover and the second box cover are arranged along the thickness direction of the circuit board. The first box cover and the second box cover are mutually covered and form a circumferential sealing fit at the joint.

20. The air conditioner according to claim 1, characterized in that, The electric control box includes a sealed box body and a circuit board arranged in the box body. The box body has a mounting opening. The electric control box further includes a wire threading structure. The wire threading structure is sealed at the mounting opening and defines a wire threading pore.

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