Air conditioner

Abstract

An air conditioner, comprising an outdoor unit, an indoor unit, and an electrical box. The electrical box comprises a mounting cavity, a first plate, a drive board assembly, a first heat dissipation device, a first cover body, a heat dissipation portion, and a fan. The first plate is configured to partition the mounting cavity into a first cavity and a second cavity, and comprises a first opening and a second opening. The drive board assembly is arranged in the second cavity and connected to the first plate. The first heat dissipation device is arranged in the first cavity and fits onto the driving board assembly, and the first opening and the second opening are arranged on two sides of the first heat dissipation device in the flow direction of an airflow. The first cover body is arranged on the outside of the first heat dissipation device. The heat dissipation portion is defined by the first cover body and the first plate, and the heat dissipation portion is in communication with both the first opening and the second opening. The fan is arranged in one of the first cavity and the second cavity, and is configured such that air in the second cavity is driven to enter the heat dissipation portion through the first opening, is blown out from the second opening, and circulates to one of the first cavity and the second cavity.

Description

air conditioner

[0001] This application claims the priority of the Chinese patent application with application number 202311863804.X filed on December 29, 2023; the priority of the Chinese patent application with application number 202323658625.0 filed on December 29, 2023; the priority of the Chinese patent application with application number 202323659217.7 filed on December 29, 2023; the priority of the Chinese patent application with application number 202323659217.7 filed on December 29, 2023; The priority of the Chinese patent application with application number 202311855055.6 filed on February 29, 2023; the priority of the Chinese patent application with application number 202311855081.9 filed on December 29, 2023; and the priority of the Chinese patent application with application number 202323661410.4 filed on December 29, 2023, all of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0003] With rising living standards and a growing demand for thermal comfort, air conditioners have become ubiquitous in countless households, becoming essential appliances in daily life. Air conditioners require refrigerant to circulate between the outdoor and indoor units during operation. The air conditioner's electrical box typically utilizes a refrigerant radiator to dissipate heat, ensuring reliable operation even in high-temperature conditions.

[0004] Summary of the Invention

[0005] An air conditioner is provided, comprising an outdoor unit, an indoor unit, and an electrical box. The indoor unit is connected to the outdoor unit. The electrical box comprises an installation cavity, a first plate, a drive plate assembly, a first heat sink, a first cover, a heat sink, and a fan. The first plate is configured to divide the installation cavity into a first cavity and a second cavity, and the first plate comprises a first opening and a second opening. The drive plate assembly is disposed in the second cavity and connected to the first plate. The first heat sink is disposed in the first cavity and is in contact with the drive plate assembly; wherein, in the direction of airflow, the first opening and the second opening are disposed on either side of the first heat sink. The first cover is disposed on the outside of the first heat sink. The heat sink is defined by the first cover and the first plate, and is in communication with the first opening heat sink and the second opening, respectively. The fan is disposed in one of the first cavity and the second cavity, and is configured to drive the gas in the second cavity into the heat sink through the first opening, be blown out through the second opening, and circulate to one of the first cavity and the second cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG1 is a structural diagram of an air conditioner according to some embodiments;

[0007] FIG2 is a structural diagram of an electrical appliance box according to some embodiments;

[0008] FIG3 is a cross-sectional view of an electrical box according to some embodiments;

[0009] FIG4 is another structural diagram of an electrical appliance box according to some embodiments;

[0010] FIG5 is a structural diagram of an electrical appliance box omitting the box body according to some embodiments;

[0011] FIG6 is an exploded view of an electrical box omitting the box body according to some embodiments;

[0012] FIG7 is a structural diagram of a first cover in an electrical appliance box according to some embodiments;

[0013] FIG8 is a structural diagram of a first heat dissipation device in an electrical appliance box according to some embodiments;

[0014] FIG9 is a structural diagram of a second heat dissipation device in an electrical appliance box according to some embodiments;

[0015] FIG10 is a structural diagram of another electrical box according to some embodiments omitting the fourth plate;

[0016] FIG11 is a structural diagram of another electrical appliance box according to some embodiments;

[0017] FIG12 is a structural diagram of a drainage mechanism of another electrical appliance box according to some embodiments;

[0018] FIG13 is a partial structural diagram of another drainage mechanism of an electrical appliance box according to some embodiments;

[0019] FIG14 is a cross-sectional view of a first heat dissipation device and a second plate of another electrical box according to some embodiments;

[0020] FIG15 is an exploded view of a first cover and a second plate of another electrical box according to some embodiments;

[0021] FIG16 is a structural diagram of another electrical box omitting the fourth plate according to some embodiments;

[0022] FIG17 is another structural diagram of yet another electrical box omitting the fourth plate according to some embodiments;

[0023] FIG18 is a cross-sectional view of a first heat dissipation device and a first cover of another electrical appliance box according to some embodiments;

[0024] FIG19 is a structural diagram of a first cover of another electrical appliance box according to some embodiments;

[0025] FIG20 is a structural diagram of another electrical appliance box according to some embodiments;

[0026] FIG21 is an enlarged view of circle A in FIG20 ;

[0027] FIG22 is an exploded view of an electrical box according to some embodiments;

[0028] FIG23 is a structural diagram of a third plate and a fourth plate of an electrical box according to some embodiments;

[0029] FIG24 is a cross-sectional view of an electrical box according to some embodiments;

[0030] FIG25 is an enlarged view of the circle M in FIG24 ;

[0031] FIG26 is an enlarged view of the circle N in FIG24 ;

[0032] FIG27 is a structural diagram of a fourth plate of an electrical appliance box according to some embodiments;

[0033] FIG28 is an enlarged view of circle Z in FIG27;

[0034] FIG29 is a structural diagram of a driving substrate of an electrical box according to some embodiments;

[0035] FIG30 is an exploded view of a driving substrate of an electrical box according to some embodiments;

[0036] FIG31 is another exploded view of a driving substrate of an electrical box according to some embodiments;

[0037] FIG32 is a structural diagram of an IGBT assembly of an electrical box according to some embodiments;

[0038] FIG33 is a structural diagram of an IGBT bracket of an electrical box according to some embodiments;

[0039] FIG34 is an exploded view of a first refrigerant heat dissipation device of an electrical appliance box according to some embodiments;

[0040] FIG35 is a cross-sectional view of an IGBT and a first refrigerant heat sink of an electrical box according to some embodiments;

[0041] FIG36 is an enlarged view of circle C in FIG35 ;

[0042] FIG37 is a cross-sectional view of an IGBT and a first refrigerant heat sink of an electrical box according to other embodiments;

[0043] FIG38 is an enlarged view of circle B in FIG37 . DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0045] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0046] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0047] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0048] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0049] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0050] Air conditioners 1 typically include split-type air conditioners and integrated air conditioners. Split-type air conditioners 1 include an indoor unit and an outdoor unit. Integrated air conditioners integrate all components of air conditioner 1 into a single housing. Integrated air conditioners can typically be moved freely within a room. Some embodiments of the present disclosure may be applied to either split-type or integrated air conditioners.

[0051] Taking a split-type air conditioner as an example, as shown in Figure 1, the air conditioner 1 includes an indoor unit 1000, an outdoor unit 2000, and refrigerant pipelines. The indoor unit 1000, the outdoor unit 2000, and the refrigerant pipelines together constitute a refrigerant system.

[0052] The refrigerant pipeline may also be referred to as a circulation pipeline, and the refrigerant pipeline connects the indoor unit 1000 and the outdoor unit 2000 to form a circulation loop.

[0053] In some embodiments, the air conditioner 1 also includes an electrical box, which includes a power device. The power device will emit a large amount of heat during the operation of the electrical box 100. Usually, the heat is dissipated through a refrigerant heat dissipation device to ensure that the air conditioner 1 operates normally and reliably under high temperature conditions.

[0054] In the related art, refrigerant temperature control is typically achieved by designing a dedicated cooling circuit, however, this increases costs. Alternatively, the refrigerant radiator can be partially placed outside the electrical box, however, this results in installation changes and affects the refrigerant radiator's corrosion resistance.

[0055] To address the above issues, as shown in FIG1 , in some embodiments, the air conditioner 1 includes an electrical box 100. The electrical box 100 is configured to implement the electrical control function of the air conditioner 1. The electrical box 100 can be disposed in the indoor unit 1000 or the outdoor unit 2000 of the air conditioner 1, or can be independent of the indoor unit 1000 and the outdoor unit 2000.

[0056] In some embodiments, as shown in FIG. 2 and FIG. 6 , the electrical box 100 includes a first plate 101 (eg, a partition), the first plate 101 includes a first avoidance portion 1011 , and the first avoidance portion 1011 is, for example, an opening structure provided on the first plate 101 .

[0057] In some embodiments, as shown in FIG. 2 , the electrical appliance box 100 further includes a mounting cavity, and a first plate 101 divides the mounting cavity of the electrical appliance box 100 into a first cavity 102 and a second cavity 103 .

[0058] In some embodiments, the first plate 101 further includes a first positioning portion 1012, which is disposed around the first avoidance portion 1011 and is formed by extending the first plate 101 toward the first cavity 102. For example, the first positioning portion 1012 can be formed by bending the first plate 101 along the periphery of the first avoidance portion 1011 toward the first cavity 102.

[0059] In some embodiments, as shown in FIG. 3 , the electrical box 100 further includes a driving board assembly 110 , which is connected to one side of the first board 101 , for example, the driving board assembly 110 is connected to a side of the first board 101 facing the second cavity 103 .

[0060] In some embodiments, as shown in FIG. 3 , the driving board assembly 110 includes a seventh board 111 . The seventh board (eg, a driving board) 111 is, for example, a PCB (Printed Circuit Board).

[0061] In some embodiments, the drive board assembly 110 further includes a power device 112, which is connected to the seventh board 111. For example, the power device 112 is connected to a side of the seventh board 111 facing the first cavity 102, and a side of the seventh board 111 facing away from the first cavity 102 can also be connected to other electrical components to increase the utilization rate of the seventh board 111.

[0062] In some embodiments, the driver board assembly 110 further includes a second heat sink (e.g., a module heat sink) 113, which is bonded to the power device 112. As shown in FIG6 , the second heat sink 113 is plugged into the first relief portion 1011. In some embodiments, the second heat sink 113 is made of metal, such as aluminum.

[0063] In some embodiments, the drive plate assembly 110 further includes a fourth plate (e.g., a backing plate) 114, which is connected to the seventh plate 111, for example, via an extended stud. Furthermore, the fourth plate 114 is connected to the first plate 101 to achieve a connection between the drive plate assembly 110 and the first plate 101. As shown in FIG6 , the fourth plate 114 includes a connecting portion 1141, which is, for example, an opening recessed from the fourth plate 114 toward the first cavity 102. The second heat sink 113 is connected to the fourth plate 114 via the connecting portion 1141. The end of the second heat sink 113 facing away from the power device 112 is exposed to the fourth plate 114 via the connecting portion 1141, and the first positioning portion 1012 serves to limit the end of the second heat sink 113 facing away from the power device 112. In this way, heat generated by the power device 112 is transferred to the second heat sink 113 and released into the first cavity 102 via the second heat sink 113, thereby dissipating heat from the power device 112.

[0064] In some embodiments, as shown in Figure 3, the electrical box 100 also includes a first heat dissipation device 120. The first heat dissipation device (for example, a refrigerant heat dissipation device) 120 is arranged in the first cavity 102. The first heat dissipation device 120 is attached to the second heat dissipation device 113 of the drive board assembly 110. In this way, the heat generated by the power device 112 can be transferred to the first heat dissipation device 120 through the second heat dissipation device 113.

[0065] In some embodiments, as shown in FIG6 , the first heat sink 120 includes a heat sink body 121. The first heat sink 120 is bonded to the driver board assembly 110 via the second heat sink 113 via the heat sink body 121. In some embodiments, the surface of the heat sink body 121 that bonds with the second heat sink 113 is flat, thereby increasing the contact area between the first heat sink 120 and the second heat sink 113. This improves the heat transfer efficiency between the first heat sink 120 and the second heat sink 113.

[0066] In some embodiments, the heat sink body 121 and the second heat sink 113 are connected, for example, by fasteners, so that the first heat sink 120 and the second heat sink 113 fit tightly together, thereby ensuring the heat transfer effect between the first heat sink 120 and the second heat sink 113.

[0067] In some embodiments, the first heat sink 120 further includes a refrigerant pipe 122. The refrigerant pipe 122 is disposed through the heat sink body 121, and the heat sink body 121 and the refrigerant pipe 122 can be connected by, for example, crimping, welding, or expansion.

[0068] In some embodiments, as shown in FIG. 4 , the refrigerant pipeline 122 includes, for example, at least one pipe 1221 .

[0069] In some embodiments, part of the refrigerant pipeline 122 is arranged inside the heat sink body 121, and at least one pipe 1221 of the refrigerant pipeline 122 away from the heat sink body 121 is connected to the refrigerant system of the air conditioner 1. Combined with the air conditioning control system (such as a controller) to control the flow direction of the refrigerant in the refrigerant system, the low-temperature refrigerant flows through the refrigerant pipeline 122. In this way, when the low-temperature refrigerant flows in the refrigerant pipeline 122, it exchanges heat with the heat sink body 121, thereby achieving a heat dissipation effect on the first heat sink 120, and then achieving a heat dissipation effect on the second heat sink 113.

[0070] In some embodiments, as shown in Figure 6, the heat dissipation device body 121 includes at least one fin 1211, and the at least one fin 1211 is arranged at one end of the heat dissipation device body 121 away from the second heat dissipation device 113, and is configured to assist the heat dissipation device body 121 in exchanging heat with the gas in the first cavity 102 and the second cavity 103 of the electrical box 100. For example, at least one fin 1211 absorbs the heat dissipated into the gas by the electrical components inside the electrical box 100, and exchanges heat with the low-temperature refrigerant in the refrigerant pipeline 122, thereby realizing heat dissipation of the gas in the first cavity 102 and the second cavity 103 of the electrical box 100.

[0071] In some embodiments, a portion of at least one fin 1211 is located outside the electrical box 100 , so that convection heat exchange between the first heat dissipation device 120 and the air outside the electrical box 100 can be achieved.

[0072] In other embodiments, the electrical appliance box 100 is a closed structure, and the first heat dissipation device 120 is disposed inside the electrical appliance box 100 .

[0073] In some embodiments, as shown in Figures 4 and 5, the electrical box 100 also includes a fan 130, which is configured to drive the gas inside the electrical box 100 to flow, so that the airflow inside the electrical box 100 exchanges heat with at least one fin 1211 to increase the heat exchange efficiency between at least one fin 1211 and the gas in the first cavity 102 and the second cavity 103 of the electrical box 100.

[0074] It should be noted that the electrical box 100 also includes other electrical components. In some embodiments, as shown in FIG4 , the electrical box 100 includes a first electrical component 190 and a second electrical component. The heat generated by the first electrical component 190 when the air conditioner 1 is operating is higher than a preset threshold, while the heat dissipated by the second electrical component when the air conditioner 1 is operating is lower than a preset threshold. The heat dissipated by the first electrical component 190 and the second electrical component is, for example, consistent with the heat generated by the components themselves.

[0075] The first electrical component 190 is connected to the first board 101. In some embodiments, the first electrical component 190 includes, for example, a filter board and a reactor.

[0076] The second electrical component is connected to the first board 101. In some embodiments, the second electrical component includes, for example, a main control board and a terminal line.

[0077] When air conditioner 1 is operating, first electrical component 190 and second electrical component generate heat, which is dissipated into the gas within first chamber 102 and second chamber 103. At this time, the control system activates fan 130, allowing the heat in the gas to exchange with the low-temperature refrigerant in refrigerant pipe 122, thereby achieving heat conduction and heat dissipation from electrical box 100 to power device 112, as well as heat dissipation from first electrical component 190 and second electrical component.

[0078] However, when the fan 130 is running, the airflow in the first cavity 102 and the second cavity 103 of the electrical box 100 is dispersed, resulting in the heat in the airflow being unable to concentrate and flow quickly to at least one fin 1211. Moreover, since the electrical box 100 is a closed structure, the heat at at least one fin 1211 cannot be directly dissipated to the outside of the electrical box 100, reducing the heat exchange efficiency between the airflow in the first cavity 102 and the second cavity 103 and the at least one fin 1211.

[0079] In some embodiments, as shown in FIG. 6 and FIG. 7 , the electrical box 100 further includes a first cover (eg, a wind cover) 140 . The first cover 140 covers the first heat dissipation device 120 and is connected to the first plate 101 .

[0080] The first cover 140 and the first plate 101 enclose a heat dissipation portion, in which the first heat dissipation device 120 is disposed. The first cover 140 can concentrate the airflow in the electrical box 100 into the heat dissipation portion, thereby increasing the heat dissipation efficiency of the electrical components inside the electrical box 100.

[0081] The first housing 140 is, for example, open toward the first plate 101. In some embodiments, as shown in FIG7 , the first housing 140 includes a first wall 141 and a second wall 142, which are disposed opposite each other along the length of the first housing 140 (direction A in FIG7 ). For example, the first wall 141 is disposed on the side of the first housing 140 that is closer to the refrigerant line 122 and exposed to the heat sink body 121; the second wall 142 is disposed on the side of the first housing 140 that is farther from the refrigerant line 122 and exposed to the heat sink body 121.

[0082] In some embodiments, the first cover body 140 further includes a third wall 143 . The third wall 143 is disposed on a side of the first cover body 140 away from the first plate 101 , and the third wall 143 is connected to the first wall 141 and the second wall 142 , respectively.

[0083] In some embodiments, the first cover body 140 further includes a first wind guiding surface 144 , and the first wall 141 and the third wall 143 are connected via the first wind guiding surface 144 .

[0084] In some embodiments, the first cover 140 further includes a second wind guide surface 145, and the second wall 142 and the third wall 143 are connected by the second wind guide surface 145. In this way, vortexes on both sides of the circulating airflow in the longitudinal direction of the first cover 140 can be reduced, thereby reducing wind resistance.

[0085] In some embodiments, the first cover body 140 also includes a fourth wall 146 and a fifth wall 1461, which extend along the length direction of the first cover body 140, and the fourth wall 146 and the fifth wall 1461 are respectively connected to the two sides of the third wall 143 along the width direction of the first cover body 140 (such as direction B in Figure 7).

[0086] In some embodiments, the fourth wall 146 includes a first clamping portion, and the first plate 101 is provided with a second clamping portion at a position corresponding to the clamping portion. The fourth wall 146 is connected to the first plate 101 through the first clamping portion and the second clamping portion, and the first cover body 140 is positioned and fixedly connected to the first plate 101 through fasteners.

[0087] In some embodiments, as shown in FIG6 , the first wall 141 of the first housing 140 includes at least one stopper 147 . The at least one stopper 147 is, for example, open toward the first plate 101 and configured to limit the position of the at least one pipe 1221 of the refrigerant pipeline 122 . The at least one pipe 1221 of the refrigerant pipeline 122 passes through the first housing 140 via the at least one stopper 147 .

[0088] In some embodiments, as shown in Figures 6 and 9, the first plate 101 further includes a first opening 1013 and a second opening 1014. The first opening 1013 and the second opening 1014 communicate with the heat dissipation portion defined by the first housing 140 and the first plate 101. In the direction of airflow, the first opening 1013 and the second opening 1014 are disposed on either side of the first heat dissipation device 120. This allows airflow to pass through the first heat dissipation device 120 within the heat dissipation portion, thereby improving the heat exchange efficiency between the airflow and the first heat dissipation device 120.

[0089] The first wind guiding surface 144 is closer to the first opening 1013 than the second wind guiding surface 145 ; the second wind guiding surface 145 is closer to the second opening 1014 than the first wind guiding surface 144 .

[0090] The fan 130 is connected to the first plate 101 and is disposed at at least one of the first opening 1013 and the second opening 1014. In some embodiments, the axis of the fan 130 is parallel to the plane of the first plate 101 so that the airflow flows parallel to the first plate 101 and can quickly flow to the electrical components in the electrical box 100.

[0091] In some embodiments, the fan 130 is disposed on a side of the first plate 101 away from the first cover 140 , that is, the fan 130 is disposed in the second cavity 103 , the first electrical component 190 is disposed in the second cavity 103 , and the second electrical component is disposed in the first cavity 102 .

[0092] At this time, as indicated by the arrow in Figure 3, the fan 130 is configured to drive the gas in the second cavity 103 into the heat dissipation part through the first opening 1013, and the heat of the airflow is transferred to at least one fin 1211 and then blown out through the second opening 1014 and circulated to the second cavity 103; at least one fin 1211 exchanges heat with the low-temperature refrigerant in the refrigerant pipe 122, thereby realizing an air-cooled heat dissipation cycle for the first electrical component 190 in the second cavity 103.

[0093] In other embodiments, the fan 130 is disposed in the first cavity 102, and the first electrical component 190 is disposed in the first cavity 102. The first opening 1013 and the second opening 1014 can be disposed in the first cover 140. For example, the first opening 1013 and the second opening 1014 are disposed on a side of the first cover 140 away from the first plate 101, that is, on the third wall 143, or the first opening 1013 and the second opening 1014 are disposed on a side of the first cover 140 connected to the first plate 101.

[0094] At this time, the fan 130 can drive the gas in the first cavity 102 to flow through the first heat dissipation device 120 in the heat dissipation portion, thereby achieving air cooling and heat dissipation of the first electrical component 190 in the first cavity 102 .

[0095] In some embodiments of the present disclosure, the fan 130 and the first electrical component 190 are disposed in the same cavity, for example, the fan 130 and the first electrical component 190 are disposed in the first cavity 102, or the fan 130 and the first electrical component 190 are disposed in the second cavity 103. In this way, the heat dissipation rate of the first electrical component 190 can be increased, ensuring the heat dissipation effect of the electrical box 100.

[0096] In some embodiments, as shown in Figure 5, the first electrical component 190 is, for example, arranged on one side of the first plate 101 along the width direction of the electrical box 100 (direction A in Figure 5), and the drive plate assembly 110 is, for example, arranged on the other side of the first plate 101 along the width direction of the electrical box 100.

[0097] In some embodiments, the air outlet end of the fan 130 is disposed toward the first electrical component 190 , so that the airflow driven by the fan 130 flows toward the first electrical component 190 , thereby increasing the heat dissipation efficiency of the first electrical component 190 .

[0098] In other embodiments, the first electrical component 190 and the drive board assembly 110 are arranged in sequence along the length direction of the electrical box 100. At this time, the air outlet end of the fan 130 is set toward the first electrical component 190 and the drive board assembly 110 to increase the heat dissipation efficiency of the first electrical component 190.

[0099] In some embodiments, as shown in Figure 8, at least one fin 1211 extends in a direction parallel to the plane where the first plate 101 is located, and the first opening 1013 and the second opening 1014 are arranged on both sides of the first heat dissipation device 120 along the airflow direction. The airflow in the heat dissipation portion flows in a direction parallel to the plane where the first plate 101 is located. In this way, the flow direction of the airflow (for example, as shown by the arrow in Figure 3) can be consistent with the extension direction of at least one fin 1211, thereby reducing the wind resistance of at least one fin 1211, increasing the flow speed of the airflow, and thereby increasing the heat exchange efficiency between the airflow and at least one fin 1211.

[0100] In some embodiments, the distance between the heat sink body 121 and the fourth wall 146 is defined as D1, and the distance between the heat sink body 121 and the third wall 143 is defined as D2. When at least one fin 1211 includes multiple fins 1211, the distance between two adjacent fins 1211 in the multiple fins 1211 is D3. Therefore, D1 and D3 satisfy the following relationship: D1 < D3; and D2 and D3 satisfy the following relationship: D2 < D3. This can reduce the amount of airflow flowing through the gap between the heat sink body 121 and the fourth wall 146 or the gap between the heat sink body 121 and the third wall 143, allowing airflow to flow over at least one fin 1211, ensuring heat dissipation efficiency.

[0101] As shown in Figures 5 and 6, in some embodiments, the electrical box 100 also includes a second cover (for example, a fan cover) 150, which is arranged on the outside of the fan 130, connected to the first plate 101, and arranged at at least one of the first opening 1013 or the second opening 1014.

[0102] In some embodiments, as shown in FIG. 6 , the second cover 150 includes a first mounting portion 151 . The first mounting portion 151 is, for example, an opening disposed on a side wall of the second cover 150 . The fan 130 is disposed at the first mounting portion 151 .

[0103] In some embodiments, the air conditioner 1 further includes a temperature sensor, which is disposed at the first opening 1013 and configured to detect the temperature of the gas at the first opening 1013 .

[0104] The control system obtains the gas temperature value at the first opening 1013 measured by the temperature sensor and adjusts at least one of the rotation speed, refrigerant flow rate, or refrigerant temperature of the fan 130 based on the gas temperature value to control the gas temperature inside the electrical box 100 within a preset temperature range to prevent the gas temperature inside the electrical box 100 from being too high, which would affect the life of the electrical components, or from being too low, which would cause condensation inside the electrical box 100. The endpoints of the preset temperature range are a first preset temperature and a second preset temperature, and the first preset temperature is greater than the second preset temperature.

[0105] For example, if the air temperature value obtained by the control system is greater than the first preset temperature, at least one of the following actions is performed: controlling the fan 130 to increase its speed; increasing the refrigerant flow rate at the first heat sink 120; or decreasing the refrigerant temperature at the first heat sink 120. This prevents the air temperature inside the electrical box 100 from being too high.

[0106] If the air temperature value obtained by the control system is less than the second preset temperature, at least one of the following is performed: controlling the fan 130 to reduce its speed; reducing the refrigerant flow rate at the first heat sink 120; or increasing the refrigerant temperature at the first heat sink 120. This prevents the air temperature inside the electrical box 100 from being too low.

[0107] It should be noted that, in certain extreme cases, for example, when the air conditioner 1 is short of refrigerant, high temperature and humidity, or refrigerant temperature control fails, condensation may form on the surface of the first heat dissipation device 120 .

[0108] As shown in FIG2 , with a horizontal plane as a reference plane, when the length direction of the first heat sink 120 after installation is perpendicular to the reference plane, condensation formed on the surface of the first heat sink 120 can be discharged along the refrigerant pipe 122. However, as shown in FIG10 and FIG11 , when the length direction of the first heat sink 120 after installation is parallel to the reference plane, condensation may penetrate into the electrical components inside the first cover body electrical box 100 through the gap between the first cover body 140 and the first plate 101, causing damage to the electrical components; when the first cover body 140 and the first plate 101 are sealed, the condensation cannot flow out of the first cover body 140. However, under the action of the fan 130, the condensation will also follow the heat dissipation airflow to other electrical components in the electrical box 100.

[0109] In some embodiments of the present disclosure, as shown in FIG12 , when the length direction of the installed first heat dissipation device 120 is parallel to the reference plane, the fourth wall 146 of the first cover body 140 includes a first drainage portion (for example, a through hole passing through the first cover body 140) 146a, and the first drainage portion 146a is configured to avoid the refrigerant pipeline 122 and allow condensation inside the first cover body 140 to flow out of the first cover body 140 through the first drainage portion 146a.

[0110] In some embodiments, the fourth wall 146 further includes a water guide surface 161, which is disposed on a side of the fourth wall 146 proximal to the first heat sink 120. The water guide surface 161 extends obliquely toward the first drainage portion 146a and away from the first heat sink 120. This prevents the spread of condensation and addresses the potential safety hazard of electrical short circuits caused by condensation.

[0111] In other embodiments, as shown in Figures 13 and 14, the electrical box 100 includes a second plate (e.g., a water guide plate) 160, which is disposed on a side of the fourth wall 146 near the first heat sink 120 and is configured to collect condensation dripping from the first heat sink 120 and guide the condensation to the first drainage portion 146a so that the condensation is discharged from the first housing 140. In this case, a water guide surface 161 is formed, for example, by a side of the second plate 160 near the first heat sink 120. The water guide surface 161 extends obliquely away from the first heat sink 120 in a direction toward the first drainage portion 146a, so that the condensation flows along the water guide surface 161 to the first drainage portion 146a under the action of gravity.

[0112] In some embodiments, along the length direction of the electrical box 100 , the length of the second plate 160 is greater than the length of the heat sink body 121 , so that condensation on the heat sink body 121 can be completely collected by the second plate 160 .

[0113] In some embodiments, as shown in Figures 13 and 15 , fourth wall 146 further includes an extension portion 162. Extension portion 162 is disposed on a side of second plate 160 adjacent to first drainage portion 146a and extends from an end of second plate 160 adjacent to first drainage portion 146a toward first drainage portion 146a. The side of extension portion 162 facing the fifth wall, for example, is a portion of water guide surface 161.

[0114] In some embodiments, as shown in Figure 15, the fourth wall 146 also includes an edge portion 163, which extends from an end of the second plate 160 away from the first plate 101 toward the first heat dissipation device 120 to prevent condensation from flowing out from the side of the second plate 160 close to the third wall 143.

[0115] In some embodiments, as shown in FIG15 , the second plate 160 further includes a second plate body 164 and a mounting portion 165. The mounting portion 165 extends from an end of the second plate body 164 adjacent to the fourth wall 146 toward the fourth wall 146. The second plate body 164 is connected to the first plate 101 through the engagement of fasteners with the mounting portion 165.

[0116] In some embodiments, the second plate 160 and the first plate 101 can be connected by claws and fasteners, and the claws are, for example, provided on the second plate body 164.

[0117] In some embodiments, a sealing gasket may be provided at the connection between the second plate 160 and the first plate 101 to prevent condensation from leaking from the gap between the second plate 160 and the first plate 101. For example, a sealing cotton gasket may be attached to the side of the second plate 160 close to the first plate 101.

[0118] In some embodiments, as shown in FIG15 , the fourth wall 146 of the first housing 140 further includes a first connecting portion 148 . The second plate 160 cooperates with the first connecting portion 148 , such that the water-guiding surface 161 of the second plate 160 forms part of the inner wall of the heat dissipation portion. In this case, the first drainage portion 146 a can be provided on the second plate 160 .

[0119] In other embodiments, the fourth wall 146 of the first cover body 140 further includes a first connecting portion (e.g., a notch) 148, the second plate 160 cooperates with the connecting portion 148, and the first drainage portion 146a is still disposed on the fourth wall 146. At this time, the second plate 160 guides the condensation to the first drainage portion 146a.

[0120] In some embodiments, as shown in FIG13 , the electrical box 100 further includes a connecting portion (e.g., a through hole) 104. One end of the connecting portion 104 is connected to the first drainage portion 146a, and the other end is connected to the exterior of the electrical box 100. This allows condensation to drain from the first drainage portion 146a and then out of the electrical box through the connecting portion 104, preventing damage to electrical components within the electrical box 100 caused by condensation.

[0121] In some embodiments, the communication portion 104 is disposed on a side of the first drainage portion 146 a away from the first cover 140 , so that condensation drips from the first drainage portion 146 a to the communication portion 104 under the action of gravity.

[0122] In some embodiments, when some electrical components are arranged on the flow path of condensation flowing out after passing through the first drainage portion 146a, a connecting pipe can be set between the first drainage portion 146a and the connecting portion 104 to allow the condensation to be discharged to the connecting portion 104 through the connecting pipe.

[0123] In some embodiments, as indicated by the arrows in FIG13 , the refrigerant pipe 122 of the first heat sink 120 extends from the first housing 140, perpendicular to the reference plane, and passes through the connecting portion 104 to exit the electrical box 100. Condensation flows out of the first housing 140 through the gap between the first drainage portion 146a and the refrigerant pipe 122, and out of the electrical box 100 through the gap between the connecting portion 104 and the refrigerant pipe 122.

[0124] In some embodiments, the extension portion 162 of the second plate 160 extends to the refrigerant pipe 122 .

[0125] In other embodiments, a gap exists between the extension portion 162 of the second plate 160 and the first drain portion 146a along the length of the first housing 140. In this case, the fourth wall 146 of the first housing 140 further includes a second drain portion 146b disposed in the gap between the second plate 160 and the first drain portion 146a. The second drain portion 146b extends obliquely away from the fifth wall toward the first drain portion 146a, allowing condensation to be guided by the second plate 160 to the second drain portion 146b and then flow along the second drain portion 146b to the first drain portion 146a.

[0126] In some embodiments, the distance between the water guiding surface 161 and the fifth wall is smaller than the distance between the second drainage portion 146b and the fifth wall.

[0127] 13 , the fourth wall 146 further includes a water retaining portion 146 c, which is disposed at an end of the second drainage portion 146 b adjacent to the first plate 101. The water retaining portion 146 c extends from the second drainage portion 146 b away from the fourth wall 146 and is configured to prevent condensation from flowing out of the gap between the first housing 140 and the first plate 101.

[0128] In some embodiments, as shown in Figure 15, the fourth wall 146 also includes a second connection portion (for example, a protrusion) 148a, which is arranged at one end of the first connection portion 148 close to the first drainage portion 146a and extends from the second drainage portion 146b toward the first heat dissipation device 120.

[0129] In some embodiments, one end of the second connection portion 148 a close to the first heat dissipation device 120 abuts against the extension portion 162 .

[0130] 14 , the at least one fin 1211 of the first heat dissipation device 120 extends along the length of the first housing 140. When the at least one fin 1211 includes a plurality of fins 1211, the fin closest to the fourth wall 146 among the plurality of fins 1211 is defined as a bottom fin 1212.

[0131] In some embodiments, the bottom fin 1212 includes a baffle 1213, which extends obliquely from a side of the bottom fin 1212 away from the first plate 101 and away from the fourth wall 146. It will be appreciated that the area of ​​the bottom fin 1212 on the reference surface is larger than the areas of the other fins in the plurality of fins 1212, so as to collect condensation flowing from the other fins and discharge it from both sides of the bottom fin 1212 along the length direction of the first cover body 140.

[0132] In some embodiments, a thermal insulation pad may be attached to the side of the bottom fin 1212 facing the fourth wall 146 to prevent condensation from forming on the side of the bottom fin 1212 facing the fourth wall 146 .

[0133] In some embodiments, the length of the first positioning portion 1012 is, for example, greater than or equal to 8 mm in a direction perpendicular to the plane of the first plate 101. This prevents condensation generated on the surface of the second heat sink 113 from flowing toward the gap between the second plate 160 and the first plate 101.

[0134] In other embodiments, as shown in FIG18 , the fourth wall 146 of the first housing 140 includes a water guide 149 and a first drainage portion 146a. The water guide 149 extends obliquely away from the second heat sink 113 in a direction away from the first plate 101. The first drainage portion 146a is disposed at an end of the water guide 149 away from the first plate 101. For example, the first drainage portion 146a can be disposed at a bottom corner of the first housing 140 away from the first plate 101. Thus, as indicated by the arrow in FIG18 , condensation dripping onto the water guide 149 flows under gravity to the first drainage portion 146a and is discharged from the first housing 140 via the first drainage portion 146a.

[0135] The tilt angle of water guide 149 relative to the horizontal direction can range from [10°, 15°], with examples including 10°, 11°, 12°, 13°, 14°, and 15°. If the tilt angle is too small, condensation will not flow along water guide 149. If the tilt angle is too large, the space between water guide 149 and fins 1211 will increase, and airflow passing through this space will not come into contact with fins 1211, reducing the heat dissipation efficiency of the air-cooled system. Therefore, when the tilt angle is within the range of [10°, 15°], the smooth discharge of condensation can be ensured while minimizing the impact on heat dissipation efficiency.

[0136] In some embodiments, as shown in Figures 16 and 17 , the first drainage portion 146a is, for example, a micropore, i.e., a through hole whose maximum dimension is less than a predetermined length. In this case, the fourth wall 146 may include at least one first drainage portion 146a. If the at least one first drainage portion 146a includes a plurality of first drainage portions 146a, the plurality of first drainage portions 146a are spaced apart.

[0137] It should be noted that the shape of the first drain portion 146a is, for example, at least one of a circle, a rhombus, and a rectangle. If the first drain portion 146a is circular, its maximum dimension is its diameter. In this case, the length of the diameter of the first drain portion 146a is, for example, less than or equal to the width between adjacent fins 1211. If the first drain portion 146a is rectangular, its maximum dimension is the length of its long side. In this case, the length of the long side of the first drain portion 146a is, for example, less than or equal to the width between adjacent fins 1211. If the first drain portion 146a is rhombus, its maximum dimension is the length of its long diagonal. In this case, the length of the long side of the first drain portion 146a is, for example, less than or equal to the width between adjacent fins 1211.

[0138] In this way, the airflow blown by the fan 130 in the first housing 140 can be prevented from leaking from the first drainage portion 146a, reducing the impact of airflow leakage on the heat dissipation efficiency of the electrical box 100. When the fourth wall 146 includes multiple first drainage portions 146a, the condensation discharge efficiency can be guaranteed.

[0139] In some embodiments, no electrical components are provided on the side of the fourth wall 146 away from the fifth wall, so as to prevent condensation from dripping onto the electrical components after being discharged from the first drainage portion 146 a .

[0140] In other embodiments, as shown in FIG17 , a target electrical component 115 is disposed on a side of the fourth wall 146 away from the fifth wall. It should be noted that the target electrical component 115 may be connected to the fourth wall 146 or may not be connected to the fourth wall 146 .

[0141] The projection of the target electrical component 115 on the fourth wall 146 of the first housing 140 does not intersect with the projection of the first drainage portion 146a on the fourth wall 146 of the first housing 140. For example, the target electrical component 115 is positioned close to the first plate 101, and the first drainage portion 146a is positioned away from the first plate 101. This allows the target electrical component 115 to be positioned outside the flow path of condensation flowing out through the first drainage portion 146a, preventing condensation from dripping onto the target electrical component 115.

[0142] The projection of the target electrical component 115 on the first plate 101 does not intersect with the projection of the first drainage portion 146a on the first plate 101. In this way, the first drainage portion 146a can be kept away from the target electrical component 115, so that when the electrical box 100 is vibrated by external force, condensation flowing out through the first drainage portion 146a will not drip onto the target electrical component 115.

[0143] In some embodiments, as shown in FIG19 , the fourth wall 146 of the first housing 140 further includes at least one isolating portion 149 a. The at least one isolating portion 149 a is disposed on a side of the water guide 149 away from the fourth wall 146 and extends from the water guide 149 in a direction away from the fourth wall 146. A side of the at least one isolating portion 149 a away from the fourth wall 146 is parallel to the reference plane. The at least one isolating portion 149 a is configured to block the heat dissipation airflow from the gap between the water guide 149 and the at least one fin 1211. This allows the heat dissipation airflow to pass through the at least one fin 1211, thereby improving the heat dissipation efficiency of the electrical box 100.

[0144] In the case where the at least one isolating portion 149 a includes a plurality of isolating portions 149 a , the plurality of isolating portions 149 a are spaced apart along the length direction of the first cover body 140 in the direction of airflow.

[0145] In some embodiments, as shown in FIG19 , the fourth wall 146 of the first cover body 140 further includes a flat plate portion 149b , which is disposed on a side of the water guide portion 149 close to the first plate 101 and perpendicular to the plane where the first plate 101 is located.

[0146] 18 and 19 , the first cover 140 abuts the first positioning portion 1012 via the flat portion 149b. A sealing gasket may be provided between the flat portion 149b and the first positioning portion 1012 to seal the fourth wall 146 of the first cover 140 and the first plate 101.

[0147] In some embodiments, the fourth wall 146 further includes a bent portion 149c, which is disposed on a side of the flat portion 149b that is closer to the first plate 101 and is parallel to the plane of the first plate 101. The first cover 140 abuts against the first plate 101 via the bent portion 149c. A sealing gasket may be disposed between the bent portion 149c and the first plate 101 to seal the gap between the first cover 140 and the first plate 101 and prevent condensation from seeping through the gap between the first cover 140 and the first plate 101.

[0148] In some embodiments, the sealing gasket may be adhered to a side of the first cover 140 close to the first plate 101 , and the sealing gaskets on the flat portion 149 b and the bent portion 149 c may be integrally formed, for example.

[0149] In some embodiments, the mounting portion 165 is arranged on a side of the bending portion 149c away from the fifth wall, and the fourth wall 146 is connected to the first plate 101 through the cooperation of the fastener and the mounting portion 165 to fix the first cover body 140 to the first plate 101 and fix the sealing gasket.

[0150] In some embodiments, as shown in Figures 17 and 19 , the first housing 140 further includes at least one wiring portion 1401. For example, the at least one wiring portion 1401 is disposed at an end of the fifth wall of the first housing 140 that is away from the fourth wall. If the at least one wiring portion 1401 includes a plurality of wiring portions 1401, the plurality of wiring portions 1401 are spaced apart along the length of the first housing 140.

[0151] In some embodiments, the wiring portion 1401 and the first cover 140 are integrally formed.

[0152] In some embodiments, as shown in FIG19 , the wiring portion 1401 includes at least one first hook 1403 and at least one second hook 1404 . The at least one first hook 1403 and the at least one second hook 1404 cooperate to secure the wires inside the electrical box 100 .

[0153] In some embodiments, the wiring portion 1401 further includes a fixing portion 1405, and the at least one first hook portion 1403 is connected to the fifth wall via the fixing portion 1405. The at least one first hook portion 1403 and the at least one second hook portion 1404 are disposed on a side of the fixing portion 1405 away from the fifth wall, and the at least one first hook portion 1403 and the at least one second hook portion 1404 are respectively disposed on two sides of the fixing portion 1405 in a direction perpendicular to the first plate 101.

[0154] At least one first hook portion 1403 includes a first connecting portion 1406 and a second connecting portion 1407 , wherein one end of the first connecting portion 1406 is connected to the fixing portion 1405 ; the second connecting portion 1407 extends from one end of the first connecting portion 1406 away from the fixing portion 1405 toward the first plate 101 .

[0155] The at least one second hook portion 1404 includes a third connecting portion 1408 and a fourth connecting portion 1409. The third connecting portion 1408 is connected to the fixing portion 1405, and the fourth connecting portion 1409 extends away from the first plate 101 from an end of the third connecting portion 1408 that is away from the fixing portion 1405. In some embodiments, the fourth connecting portion 1409 extends away from the first cover 140 in a direction extending away from the first plate to facilitate the insertion of the wire.

[0156] When there are two at least one first hook 1403 and one at least one second hook 1404 , the second hook 1404 is disposed between the two first hooks 1403 in the length direction of the first cover 140 .

[0157] 19 , a wire clamping groove 1402 is formed between the first hook 1403 and the second hook 1404. The wires in the first cavity 102 can be clamped into the wire clamping groove 1402, making the wiring in the first cavity 102 more standardized and concise.

[0158] In this way, it can be avoided that condensation may form on the surface of the first heat dissipation device 120 in extreme situations, for example, when the air conditioner 1 lacks refrigerant, high temperature and humidity, or the temperature control of the refrigerant fails, and the condensation may drip or spread to other components inside the air conditioner 1, causing safety hazards such as electrical short circuits.

[0159] In some embodiments, as shown in FIG20 , the electrical appliance box 100 includes a box body 105 and a sixth plate 106 . One side of the box body 105 is open, and the sixth plate 106 covers the open side of the box body 105 .

[0160] Taking the outdoor unit of an air conditioner as an example, the side of the outdoor unit where the air outlet is located is defined as the front side, and the opposite side where the air inlet is located is defined as the rear side. When repairing and maintaining the outdoor unit, the sixth panel 106 of the electrical box 100 is located on the front side of the box body 105. The sixth panel 106 can be opened directly from the front to access the electrical components within the electrical box 100.

[0161] The box body 105 includes a box body 170 and a third plate 107. The box body 170 and the third plate 107 define an installation cavity. In some embodiments, the box body 170 and the third plate 107 are, for example, integrally formed.

[0162] In other embodiments, as shown in FIG22 , the box body 170 is connected to the third plate 107. For example, the third plate 107 includes at least one flange extending toward the box body 170. When the third plate 107 and the box body are assembled, the flange surrounds the side of the box body 170 proximal to the third plate 107. The third plate 107 and the box body 170 can be connected by fasteners. The joint between the at least one flange and the side of the box body 170 proximal to the third plate 107 can be welded or sealed using a sealant.

[0163] In some embodiments, as shown in Figures 24 and 25, the third plate 107 includes a first top edge 1071. The first top edge 1071 extends obliquely toward the box body 170 in a direction away from the sixth plate 106 (direction C in Figure 24), so that water on the first top edge 1071 can flow down toward the side away from the sixth plate 106, thereby preventing water from flowing toward the connection between the third plate 107 and the sixth plate 106.

[0164] In some embodiments, the third plate 107 further includes a second top edge 1072 , where the second top edge 1072 is formed by extending from an end of the first top edge 1071 close to the sixth plate 106 toward a side away from the first top edge 1071 .

[0165] In some embodiments, as shown in Figures 23 and 25 , the electrical box 100 further includes a first support portion 108, which is disposed on a side of the third plate 107 near the box body 170. A receiving portion 109 (e.g., a receiving groove) is formed between the first support portion 108 and the second top edge 1072. The sixth plate 106 is inserted into the receiving portion 109 on a side near the third plate 107.

[0166] In some embodiments, as shown in FIG25 , the sixth plate 106 includes a first edge portion 1061, and the electrical box 100 further includes a first sealing portion 171. The first edge portion 1061 covers the open side of the box body 105. The first sealing portion 171 is, for example, disposed between the first edge portion 1061 and the second top edge 1072 to enhance the sealing effect between the third plate 107 and the sixth plate 106.

[0167] In some embodiments, the sixth plate 106 further includes a second edge 1062, which is formed by extending from the end of the first edge 1061 near the third plate 107 toward the first plate 101 (as shown in the direction C in FIG. 24 ). In this case, the first sealing portion 171 is, for example, disposed between the second edge 1062 and the first top edge 1071. This further enhances the sealing effect between the third plate 107 and the sixth plate 106, thereby meeting higher protection requirements.

[0168] In some embodiments, the sixth plate 106 further includes a third edge portion 1063. The third edge portion 1063 is formed by extending from the end of the second edge portion 1062 away from the first edge portion 1061 in a direction away from the third plate 107 (e.g., direction D in FIG. 24 ). The end of the third edge portion 1063 away from the second edge portion 1062 abuts against the first support portion 108. Thus, the first support portion 108 positions the sixth plate 106, thereby tightening the first sealing portion 171 between the first edge portion 1061 and the second top edge 1072, thereby ensuring a seal between the sixth plate 106 and the third plate 107.

[0169] In some embodiments, the first sealing portion 171 between the second edge 1062 and the first top edge 1071 and the first sealing portion 171 between the first edge 1061 and the second top edge 1072 can be integrally formed. In this way, the first sealing portion 171 can increase the sealing performance between the third plate 107 and the sixth plate 106, and can also avoid the first sealing portion 171 falling off during assembly or disassembly, thereby improving the connection reliability between the third plate 107 and the sixth plate 106.

[0170] In some embodiments, as shown in FIG. 25 , the second top edge 1072 extends obliquely away from one end of the first top edge 1071 and away from the sixth plate 106 , so that the receiving portion 109 guides the insertion of the sixth plate 106 .

[0171] In some embodiments, as shown in Figures 27 and 28, the first sealing portion 171 includes a first fixing portion 1711, which is disposed at at least one of the ends of the first sealing portion 171 in the length direction of the first side portion 1061 (e.g., direction F in Figure 27). For example, the first sealing portion 171 includes two first fixing portions 1711, and each first fixing portion 1711 is configured to improve the sealing effect between the sixth plate 106 and the box body 105. Furthermore, the first fixing portion 1711 can prevent the first sealing portion 171 from being torn off during the installation and removal of the sixth plate 106, thereby affecting its sealing performance.

[0172] In some embodiments, the electrical box 100 also includes a second sealing portion 172, which can be connected between the first top edge 1071 and the first sealing portion 171. The second edge 1062 and the first top edge 1071 are sealed by the first sealing portion 171 and the second sealing portion 172. In this way, the sealing effect between the second edge 1062 and the first top edge 1071 can be improved.

[0173] 23 , the first support portion 108 includes a first sub-support portion 1081. The first support portion 108 is connected to the first top edge 1071 via the first sub-support portion 1081. The first sub-support portion 1081 is connected to the first top edge 1071 via fasteners, for example.

[0174] In some embodiments, the first support portion 108 further includes a second sub-support portion 1082, which is connected to the first sub-support portion 1081 and disposed on a side of the first sub-support portion 1081 that is closer to the sixth board 106. In some embodiments, an end of the second sub-support portion 1082 that is away from the first sub-support portion 1081 is inclined away from the sixth board 106, so that the receiving portion 109 guides the insertion of the sixth board 106.

[0175] In some embodiments, the first support portion 108 further includes a third sub-support portion 1083 , the third sub-support portion 1083 is connected to the first sub-support portion 1081 , and the first support portion 108 is connected to the first board 101 through the third sub-support portion 1083 .

[0176] In some embodiments, as shown in FIG. 26 , the box body 105 further includes a fifth plate 1051 , which is connected to an end of the box body 170 away from the third plate 107 .

[0177] In some embodiments, the box body 105 further includes a first bottom edge 1052 , which extends from a side of the fifth plate 1051 close to the sixth plate 106 and away from the third plate 107 . A first edge 1061 of the sixth plate 106 abuts against the first bottom edge 1052 .

[0178] In some embodiments, a sealing gasket is provided between the side of the sixth plate 106 close to the fifth plate 1051 and the first bottom edge 1052 . The sealing gasket can be bonded to the sixth plate 106 , for example.

[0179] In some embodiments, the box body 105 further includes a second bottom edge 1053 , which extends from a side of the first bottom edge 1052 away from the third plate 107 and away from the first plate 101 .

[0180] In some embodiments, the sixth plate 106 further includes a second support portion 1064. The second support portion 1064 extends from an end of the first edge 1061 close to the fifth plate 1051, away from the first plate 101. The second support portion 1064 abuts the second bottom edge 1053 and is configured to support the sixth plate 106. This allows the sealing gasket between the top end of the sixth plate 106 and the first top edge 1071 to be tightly squeezed, ensuring a sealing effect between the sixth plate 106 and the third plate 107.

[0181] In some embodiments, the second supporting portion 1064 abuts against the second bottom edge 1053 .

[0182] During assembly, the end of the sixth plate 106 close to the third plate 107 can be inserted into the top receiving portion 109 first, and then the second supporting portion 1064 of the sixth plate 106 can be placed on the second bottom edge 1053 .

[0183] In some embodiments, as shown in Figure 21, the box body 105 also includes a second fixing portion (for example, a flange) 1054, and the second fixing portion 1054 is arranged on the side of the box body 170 close to the third plate 107, along the two ends of the length direction of the sixth plate 106 (direction F in Figure 20).

[0184] In some embodiments, the second fixing portion 1054 includes a fourth fixing portion 1055, which is disposed on a side of the second fixing portion 1054 that is close to the third plate 107 and extends from the side of the second fixing portion 1054 that is close to the third plate 107 away from the first plate 101. The fourth fixing portion 1055 abuts against a side of the sixth plate 106 that is close to the third plate 107, thereby preventing water from seeping into the interior of the electrical box 100 through the gap between the sixth plate 106 and the box body 105.

[0185] 28 , the electrical box 100 further includes a third sealing portion 173 disposed between the sixth plate 106 and the second fixing portion 1054. The third sealing portion 173 is attached to a side of the sixth plate 106 near the second fixing portion 1054, for example.

[0186] The sixth plate 106 is connected to the second fixing portion 1054 via a fastener to squeeze the third sealing portion 173 tightly.

[0187] In some embodiments, as shown in FIG28 , the third sealing portion 173 includes third fixing portions 1731. The third fixing portions 1731 are disposed at both ends of the first sealing portion 171 in the lengthwise direction of the sixth plate 106 (e.g., direction F in FIG27 ), and are configured to further enhance the sealing effect between the sixth plate 106 and the box body 105. The first fixing portions 1711 can also prevent the third sealing portion 173 from being torn off during installation and removal of the sixth plate 106, thereby affecting its sealing performance.

[0188] In some embodiments, as shown in FIG29 , the electrical box 100 further includes a drive board bracket 10 . The drive board bracket 10 includes a bottom wall 18 and side walls 19 . The bottom wall 18 and the side walls 19 are connected and together form a mounting cavity. The drive board bracket 10 is made of, for example, plastic and can be injection molded.

[0189] In some embodiments, as shown in FIG29 , the electrical box 100 further includes a drive substrate 20 mounted on the drive board bracket 10 . The drive substrate 20 may be a PCB. Electrical components are connected to the drive substrate 20 , for example.

[0190] It should be noted that the driving substrate 20 can be connected to the driving board bracket 10 through fasteners and a clamping portion.

[0191] In some embodiments, as shown in Figures 29 and 30, the driver board bracket 10 further includes at least one engaging portion (e.g., a buckle) 11. The at least one engaging portion 11 is disposed on a side wall 19 of the driver board bracket 10 and extends from the side wall 19 away from the bottom wall 18. When the electrical box 100 is assembled, the driver board bracket 10 secures the driver base plate 20 via the at least one engaging portion 11.

[0192] In some embodiments, as shown in Figure 30 , the driver board bracket 10 further includes at least one fifth connecting portion 12 ; correspondingly, the driver substrate 20 includes at least one sixth connecting portion. When assembling the electrical box 100 , a fastener passes through the sixth connecting portion of the driver substrate 20 and securely connects to the fifth connecting portion 12 , thereby connecting the driver substrate 20 to the driver board bracket 10 .

[0193] In some embodiments, as shown in Figures 31 and 32, the electrical box 100 further includes an insulated gate bipolar transistor (IGBT) component 30. The IGBT component 30 is disposed on the driver bracket 10 and is configured to provide power drive for high-power devices such as the compressor, fan, and motor of the air conditioner through current and voltage control.

[0194] In some embodiments, the IGBT assembly 30 includes an IGBT 31 .

[0195] In some embodiments, the IGBT 31 includes a housing 311, which can be made of plastic to provide insulation. The housing 311 includes a first mounting portion 3111 and a second mounting portion 3112. The first mounting portion 3111 is, for example, a protrusion; the second mounting portion 3112 is disposed on the first mounting portion 3111 and is, for example, a through-hole extending through the housing 311.

[0196] In some embodiments, the IGBT 31 further includes a third support portion (eg, a base) 312 . The third support portion 312 is made of metal, for example.

[0197] In some embodiments, the IGBT 31 further includes a pin 313 , and a free end of the pin 313 is connected to the driving substrate 20 . For example, the free end of the pin 313 is welded to the driving substrate 20 to achieve connection between the IGBT 31 and the driving substrate 20 .

[0198] In some embodiments, the IGBT assembly 30 further includes an IGBT bracket 32. The IGBT 31 is mounted on the IGBT bracket 32. The IGBT bracket 32 ​​is made of, for example, plastic to ensure insulation between the IGBT assembly 30 and the IGBT bracket 32.

[0199] In some embodiments, the IGBT bracket 32 ​​includes at least one third mounting portion (e.g., a groove) 321 for mounting the IGBT 31. The third mounting portion 321 is disposed on a side of the IGBT bracket 32 ​​away from the driver substrate 20. After the IGBT 31 is mounted on the second mounting portion 321, the free ends of the pins 313 extend toward the driver substrate 20.

[0200] It should be noted that the number of the third mounting portions 321 corresponds to the number of the IGBTs 31. For example, if the IGBT assembly 30 includes 12 IGBTs 31, the IGBT bracket 32 ​​also includes 12 third mounting portions 321.

[0201] In some embodiments, the IGBT bracket 32 ​​also includes a guide portion (for example, a through hole) 322, which cooperates with the pin 313 and is configured to guide and position the pin 313. The guide portion 322 constrains the positions of multiple groups of pins 313 so that the pins 313 can be accurately inserted into the pin welding holes of the driving substrate 20. It can also avoid the problem of insulation failure caused by deformation of the pin 313, which causes the distance between the pin 313 and the driving substrate 20 to be less than a preset threshold.

[0202] It should be noted that in some embodiments of the present disclosure, the IGBT bracket 32 ​​can constrain the positions of multiple IGBT groups 31, especially multiple pin groups 313, to facilitate subsequent installation. Furthermore, the IGBT bracket also ensures the subsequent insulation requirements between the fasteners and the driver substrate 20.

[0203] When assembling the IGBT assembly 30, first pass the pin 313 of the IGBT 31 through the guide portion 322, then insert it into the pin welding hole of the drive substrate 20, connect it to the drive substrate 20, and then install the drive substrate 20 and the IGBT assembly 30 together on the drive board bracket 10.

[0204] In some embodiments, as shown in FIG30 , the first heat sink 120 can be connected to the driver board bracket 10 via fasteners and fit over the third support portion 312 of the IGBT assembly 30. In this way, the first heat sink body 121 absorbs heat from the IGBT 31, and the low-temperature refrigerant in the refrigerant pipe 122 removes the heat, ensuring efficient heat dissipation of the IGBT 31.

[0205] In some embodiments, as shown in Figure 31, the driving board bracket 10 includes a second avoidance portion (for example, a through hole) 13, and the first heat dissipation device 120 is arranged on the side of the bottom wall 18 of the driving board bracket 10 away from the mounting cavity. At this time, the first heat dissipation device 120 is in contact and connected with the IGBT 31 at the second avoidance portion 13.

[0206] In other embodiments, the first heat dissipation device 120 may also be disposed in the installation cavity of the driving board bracket 10 .

[0207] In some embodiments, as shown in Figure 31, the driving plate bracket 10 also includes a second positioning portion 14, and the first heat dissipation device 120 can be set on the second positioning portion 14 to achieve positioning between the first heat dissipation device 120 and the driving plate bracket 10, and then the first heat dissipation device 120 is connected to the driving plate bracket 10 through fasteners.

[0208] In some embodiments, fasteners may be provided through the heat sink, and the first screw mounting portion 3112 of the IGBT 31 may be connected to the IGBT bracket 32 ​​to ensure a close fit between the first heat sink 120 and the IGBT 31 to ensure a heat dissipation effect.

[0209] In some embodiments, as shown in FIG31 , the IGBT assembly 30 further includes a seventh connection portion 70 and an eighth connection portion 80. The eighth connection portion 80 is, for example, a hexagonal nut made of metal. This ensures the reliability of the threaded connection, ensures tightness between the IGBT 31 and the first heat sink 120, and ensures heat transfer from the IGBT 31 to the first heat sink 120. The seventh connection portion 70 and the eighth connection portion 80 are threadedly connected.

[0210] In some embodiments, as shown in FIG33 , the IGBT bracket 32 ​​further includes a receiving portion (e.g., a countersunk hole) 323, which is disposed on the second mounting portion 321 and is configured to receive the eighth connecting portion 80. For example, the eighth connecting portion 80 may be embedded in the IGBT bracket 32 ​​during injection molding, or the eighth connecting portion 80 may be inserted into the receiving portion 323 in a separate form.

[0211] The accommodating portion 323 can ensure that only the side of the eighth connecting portion 80 facing the IGBT 31 is exposed, and the other parts are wrapped in the plastic bracket to isolate the eighth connecting portion 80 from the driving substrate 20, thereby preventing the insulation distance between the eighth connecting portion 80 and the charged devices on the driving substrate 20 from being less than a preset threshold.

[0212] In some embodiments, because the third support portion 312 of the IGBT 31 may be electrically charged, it needs to be effectively insulated from nearby metal components. Therefore, the IGBT assembly 30 further includes an insulating thermally conductive spacer 50 , which is disposed between the first heat sink 120 and the IGBT 31 and is configured to insulate the first heat sink 120 from the IGBT 31.

[0213] It should be noted that the insulating thermally conductive gasket 50 has thermal conductivity, which can ensure the efficiency of heat transfer from the IGBT 31 to the first heat sink 120 through the insulating thermally conductive gasket 50 .

[0214] In some embodiments, when the IGBT assembly 30 is assembled, the insulating thermally conductive spacer 50 may be attached to the IGBT 31 . At this time, the insulating thermally conductive spacer 50 completely covers the third supporting portion 312 of the IGBT 31 .

[0215] In other embodiments, the insulating thermally conductive pad 50 may be attached to the first heat dissipation device 120 .

[0216] In some embodiments, as shown in FIG36 , the first heat sink body 121 further includes at least one second screw mounting portion 411; the insulating thermally conductive gasket 50 includes at least one third screw mounting portion 51, and the first screw mounting portion 3112, the second screw mounting portion 411, and the third screw mounting portion 51 all cooperate. The seventh connecting portion 70 sequentially passes through the second screw mounting portion 411, the third screw mounting portion 51, and the first screw mounting portion 3112 before connecting to the IGBT bracket 32.

[0217] In some embodiments, as shown in FIG. 35 and FIG. 36 , the inner diameter of the third screw mounting portion 51 is smaller than or equal to the inner diameter of the second screw mounting portion 411 to ensure sealing insulation at the interface of the mounting holes and improve insulation performance.

[0218] It can be understood that when the third screw mounting portion 51 of the insulating thermal gasket 50 is smaller than the second screw mounting portion 411 on the first heat dissipation device 120, the insulating thermal gasket 50 does not completely cover the upper surface of the second screw mounting portion 411, and the charged components of the third support portion 312 may be transferred to the seventh connecting portion 70 through the gap at the interface.

[0219] In some embodiments, the inner diameter of the third screw mounting portion 51 is less than or equal to the first screw mounting portion 3112, so that the insulating thermally conductive gasket 50 can completely cover the side of the first screw mounting portion 3112 close to the insulating thermally conductive gasket 50, thereby ensuring the insulation at the intersection of the mounting holes.

[0220] In some embodiments, the inner diameter of the third screw mounting portion 51 is less than or equal to the inner diameter of the second screw mounting portion 411, and less than or equal to the inner diameter of the first screw mounting portion 3112. In this way, the insulating thermal gasket 50 can completely cover the interface of the mounting hole to ensure insulation.

[0221] In some embodiments, as shown in Figures 31, 34, and 37, the IGBT assembly 30 further includes an insulating ring assembly 60, which is disposed between the seventh connecting portion 70 and the first heat sink 120. The insulating ring assembly 60 is made of, for example, insulating plastic. The insulating ring assembly 60 is inserted into the second screw mounting portion 411. The seventh connecting portion 70 passes through the insulating ring assembly 60, the third screw mounting portion 51, and the first screw mounting portion 3112 to connect to the IGBT bracket 32.

[0222] In some embodiments, as shown in Figures 31 and 38, the insulating ring assembly 60 includes a spacer portion 61 and a ninth connecting portion (e.g., a protruding ring) 62. The spacer portion 61 is connected to the ninth connecting portion 62, and the ninth connecting portion 62 is formed by protruding from the spacer portion 61. The ninth connecting portion 62 is disposed through the second screw mounting portion 411 of the first heat sink 120. The spacer portion 61 is configured to isolate the first heat sink 120 from the screw cap, and the ninth connecting portion 62 is configured to isolate the screw post from the second screw mounting portion 411.

[0223] The insulating ring assembly 60 isolates and insulates the first heat sink 120 from the seventh connecting portion 70 through the spacer portion 61 and the ninth connecting portion 62 .

[0224] In some embodiments, as shown in Figures 37 and 38, the inner diameter of the third screw mounting portion 51 of the insulating thermally conductive gasket 50 is less than or equal to the inner diameter of the ninth connecting portion 62. In this way, the insulating thermally conductive gasket 50 covers the side of the insulating ring group 60 close to the insulating thermally conductive gasket 50, ensuring seamless sealing insulation at the intersection of its mounting holes and improving insulation performance.

[0225] In some embodiments, the first heat sink body 121 further includes a tenth connection portion (e.g., a groove) 412, which is disposed at an end of the first heat sink body 121 away from the IGBT 31. When the IGBT assembly 30 is assembled, the seventh connection portion 70 is disposed within the tenth connection portion 412 to ensure the flatness of the first heat sink 120.

[0226] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. An air conditioner, comprising: An outdoor unit; An indoor unit connected to the outdoor unit; And An electrical box, comprising: An installation cavity; A first plate configured to divide the installation cavity into a first cavity and a second cavity, the first plate including a first opening and a second opening; A drive board assembly disposed in the second cavity and connected to the first plate; A first heat dissipation device disposed in the first cavity and attached to the drive board assembly; wherein, in the airflow direction, the first opening and the second opening are disposed on both sides of the first heat dissipation device; A first cover covering the outside of the first heat dissipation device; A heat dissipation portion defined by the first cover and the first plate, and the heat dissipation portion is respectively communicated with the first opening heat dissipation portion and the second opening; A fan disposed in one of the first cavity and the second cavity, the fan being configured to drive the gas in the second cavity to enter the heat dissipation portion through the first opening, blow out through the second opening, and circulate to one of the first cavity and the second cavity.

2. The air conditioner according to claim 1, wherein, The fan is disposed in the second cavity; The electrical box further includes a first electrical component; the first electrical component is disposed in the second cavity, and the heat generation of the first electrical component is greater than a preset threshold; The air outlet end of the fan is disposed toward the first electrical component, and the axis of the fan is parallel to the plane where the first plate is located.

3. The air conditioner according to claim 1, wherein, The fan is disposed in the first cavity; The electrical box further includes a first electrical component; the first electrical component is disposed in the first cavity, and the heat generation of the first electrical component is greater than a preset threshold; The air outlet end of the fan is disposed toward the first electrical component, and the axis of the fan is parallel to the plane where the first plate is located.

4. The air conditioner according to any one of claims 1 to 3, wherein, The electrical box further includes: A second cover connected to the first plate and disposed at the second opening; the second cover covers the outside of the fan; Wherein, the second cover includes a first installation portion, and the fan is disposed at the first installation portion.

5. The air conditioner according to any one of claims 1 to 4, wherein, The drive board assembly includes a second heat dissipation device; The first heat dissipation device is attached to the drive board assembly through the second heat dissipation device.

6. The air conditioner according to claim 5, wherein, The first heat dissipation device includes: A heat dissipation device body including at least one fin, the at least one fin being disposed at an end of the heat dissipation device body away from the second heat dissipation device; A refrigerant pipeline passing through the heat dissipation device body; Wherein, the length direction of the at least one fin is consistent with the airflow direction in the heat dissipation portion.

7. The air conditioner according to any one of claims 1 to 6, wherein, The first cover includes: A first wall and a second wall; the first wall and the second wall are disposed opposite to each other along the length direction of the first cover; A third wall disposed on a side of the first cover away from the first plate; the third wall is connected to the first wall and connected to the second wall; and The first air guiding surface and the second air guiding surface; the first wall and the third wall are connected through the first air guiding surface; the second wall and the third wall are connected through the second air guiding surface; the first air guiding surface is closer to the first opening than the second air guiding surface, and the second air guiding surface is closer to the second opening than the first air guiding surface.

8. The air conditioner according to claim 7, wherein, The first cover body further includes a fourth wall, the fourth wall extends along the length direction of the first cover body, and the two sides of the fourth wall in the width direction of the first cover body are connected to the third wall; When the at least one fin includes a plurality of fins, the distance between the heat dissipation device body and the fourth wall is less than the distance between two adjacent fins among the plurality of fins.

9. The air conditioner according to claim 8, wherein, The first wall includes at least one limiting portion, and the at least one limiting portion is configured to limit the refrigerant pipeline; the refrigerant pipeline passes through the at least one limiting portion and exits the first cover body.

10. The air conditioner according to any one of claims 1 to 9, further comprising: A temperature sensor, the temperature sensor is arranged at the first opening and is configured to detect the gas temperature at the first opening; And A control system, the control system is configured to obtain the gas temperature value at the first opening and adjust the rotation speed of the fan through the gas temperature value so as to control the gas temperature inside the electrical box within a preset range.

11. The air conditioner according to claim 8, wherein, The fourth wall includes: A second plate, the second plate is arranged on the side of the fourth wall close to the first heat dissipation device and is configured to collect the condensed water dripped by the first heat dissipation device; A first drainage portion, the first drainage portion is configured to drain the condensed water out of the first cover body.

12. The air conditioner according to claim 11, wherein, The fourth wall further includes a water guiding surface, and the water guiding surface is formed on the side of the second plate close to the first heat dissipation device; the water guiding surface extends obliquely away from the first heat dissipation device in the direction towards the first drainage portion.

13. The air conditioner according to claim 12, wherein, The fourth wall further includes a water blocking portion and a second drainage portion, and the water blocking portion is arranged at one end of the second drainage portion close to the first plate; The water blocking portion extends away from the fourth wall from the second drainage portion and is configured to block the condensed water from flowing out through the gap between the first cover body and the first plate.

14. The air conditioner according to any one of claims 11 to 13, wherein, The fourth wall further includes an edge portion, and the edge portion extends from one end of the second plate away from the first plate towards the first heat dissipation device and is configured to block the condensed water from flowing out from the side of the second plate close to the third wall.

15. The air conditioner according to any one of claims 11 to 14, wherein, When the at least one fin includes a plurality of fins, the fin among the plurality of fins with the closest distance to the fourth wall is defined as the bottom fin; The bottom fin includes a blocking portion, and the blocking portion extends obliquely away from the fourth wall from the side of the bottom fin away from the first plate.

16. The air conditioner according to any one of claims 11 to 15, wherein, The fourth wall further includes an extension portion, and the extension portion is arranged on the side of the second plate close to the first drainage portion and extends from one end of the second plate close to the first drainage portion towards the first drainage portion.

17. The air conditioner according to claim 16, wherein, The fourth wall further includes: A first connecting portion, and the second plate cooperates with the first connecting portion; The second connecting part, which is arranged at one end of the first connecting part close to the first drainage part and extends from the water guiding surface towards the first heat dissipation device; One end of the second connecting part close to the first heat dissipation device abuts against the extension part.

18. The air conditioner according to any one of claims 5 to 17, wherein, The first plate includes: The first avoidance part, into which the second heat dissipation device of the driving plate assembly is inserted; The first positioning part, which is arranged on the periphery of the first avoidance part and is formed by the first plate extending towards the first cavity.

19. The air conditioner according to any one of claims 1 to 18, wherein, The electrical box further includes: The box body; The box body includes: The box main body; The third plate, which is respectively connected to the third plate and the fourth plate of the box main body, and is hermetically connected between the fourth plate and the third plate; the third plate includes a first top edge and a second top edge; the second top edge extends from one end of the first top edge close to the fourth plate towards the side away from the first top edge; The first supporting part, which is arranged on the side of the third plate close to the box main body; a receiving part is formed between the first supporting part and the second top edge, and one side of the fourth plate close to the third plate is inserted into the receiving part; The fourth plate includes: The first side part, which covers the open side of the box body; The second side part, which is formed by the first side part extending from one end close to the third plate towards the first plate; and the third side part, which is formed by the second side part extending from one end away from the first side part towards the direction away from the third plate; one end of the third side part away from the second side part abuts against the first supporting part.

20. The air conditioner according to claim 19, wherein, The box body further includes: The fifth plate, which is connected to one end of the box main body away from the third plate; The first bottom edge, which extends from one side of the fifth plate close to the fourth plate away from the third plate; the first side part abuts against the first bottom edge; The second bottom edge, which extends from one side of the first bottom edge away from the third plate away from the first plate; The fourth plate further includes a second supporting part, which extends from one end of the first side part close to the fifth plate away from the first plate; the second supporting part abuts against the second bottom edge.

21. The air conditioner according to claim 19 or 20, wherein, The electrical box further includes a first sealing part; the first sealing part is arranged between the first side part and the second side part; The second side part and the first top edge, and the first side part and the second top edge are sealed through the first sealing part.

22. The air conditioner according to claim 21, wherein, The electrical box further includes a second sealing part, which is arranged between the first top edge and the first sealing part; the second side part and the first top edge are sealed through the first sealing part and the second sealing part.

23. The air conditioner according to claim 21 or 22, wherein, The first sealing part includes a first fixing part, which is arranged at at least one end of the first sealing part in the length direction of the first side part.

24. According to the air conditioner of claim 21, wherein, The box body further includes a second fixing portion, and the second fixing portion is disposed at two ends along the length direction of the fourth plate on a side of the box body close to the third plate. The electrical box further includes a third sealing portion, and the third sealing portion is disposed between the fourth plate and the second fixing portion.

25. The air conditioner according to claim 24, wherein The third sealing portion includes a third fixing portion, and the third fixing portion is disposed at two ends of the first sealing portion along the length direction of the fourth plate.

26. The air conditioner according to claim 24, wherein, The second fixing portion includes a fourth fixing portion, and the fourth fixing portion is disposed on a side of the second fixing portion close to the third plate and extends away from the first plate from a side of the second fixing portion close to the third plate.

27. The air conditioner according to any one of claims 19 to 26, wherein, The second top edge extends from one end of the first top edge close to the fourth plate toward a side away from the first top edge.

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