CN218526652U - Electrical apparatus box and air conditioner - Google Patents

Abstract

The utility model relates to an electrical apparatus box and air conditioner, specifically include body and first radiator, the body is inside to have a cavity, be equipped with useful electric part in the cavity, first radiator includes first radiating part and the second radiating part of heat conduction connection, first radiating part is located the cavity and is connected with the heat conduction of useful electric part, the second radiating part is located outside the cavity, wherein, first radiator is constructed to carry out the heat transfer in the cavity and outside the cavity through first radiating part and second radiating part. So, the electrical apparatus box that this application provided, when the cavity internal temperature was too high, can be through first heat dissipation portion with heat transfer to the second heat dissipation portion be the cavity external, when the cavity internal temperature was crossed lowly, through first heat dissipation portion with cold volume transmission to outside the cavity to realize the constancy of temperature in the cavity, avoid the condensation phenomenon of the inside heat collection or the low production of temperature of electrical apparatus box because the high production of temperature.

Description

Electrical apparatus box and air conditioner

Technical Field

The application relates to the technical field of heat dissipation of electrical boxes, in particular to an electrical box and an air conditioner.

Background

An electric box of an air conditioner is a structure for assembling components and parts of the air conditioner, such as a press driving plate, a fan driving plate, a filter plate, an IPM module (intelligent power module) and other electric components, and heat dissipation, water prevention and condensation prevention are always the key points of the design of the electric box of the air conditioner.

Under the commercial air conditioner installation environment, hidden danger will exist in the aspect of electrical apparatus box windowing heat dissipation reliability, if intake dust scheduling problem. If not windowing, the inside temperature rise of automatically controlled box will become abominable, and inside temperature can't the effluvium, and inside air can't flow, forms the heat accumulation, and then leads to inside to use the electric part overheat life to reduce or even high temperature burns out.

In order to avoid the above-mentioned condition, the electrical apparatus box generally is sealed setting to the cooling of built-in cold source and power consumption part direct contact, because of the unable and external circulation of sealed electrical apparatus box inside air, the electrical apparatus box inside produces the condensation easily, burns the power consumption part more easily.

SUMMERY OF THE UTILITY MODEL

Based on this, this application provides an electrical apparatus box and air conditioner to the poor problem of current electrical apparatus box radiating effect, and this electrical apparatus box has sealed effectual, the radiating effect is good and avoid the technological effect of condensation.

An electrical box comprising: the body is internally provided with a cavity, and a useful electric part is assembled in the cavity; and

the first radiator comprises a first radiating part and a second radiating part which are in heat conduction connection, the first radiating part is positioned in the cavity and is in heat conduction connection with the electric component, and the second radiating part is positioned outside the cavity;

wherein the first heat sink is configured to exchange heat inside and outside the cavity through the first heat sink portion and the second heat sink portion.

In one embodiment, the electrical box further comprises a first fan disposed within the cavity and configured to form a first circulating air duct within the cavity;

the first heat dissipation part is positioned in the first circulating air duct.

In one embodiment, the air outlet of the first fan is arranged facing the first heat sink.

In one embodiment, the first heat dissipation part is of a metal fin structure, a first air duct is formed between every two adjacent fins, and the first air duct extends along the air outlet direction of the first fan and forms part of a first circulating air duct.

In one embodiment, the electrical box further comprises a second radiator, the second radiator comprises a heat exchange tube, a heat exchange medium flows in the heat exchange tube, the heat exchange tube penetrates through the cavity from the outside of the cavity, and the heat exchange medium exchanges heat with air in the cavity.

In one embodiment, the electric component comprises an IPM module, the IPM module is arranged in the cavity, and the heat exchange tube is attached to the IPM module.

In one embodiment, the first heat sink piece is thermally coupled to the IPM module.

In one embodiment, the heat dissipation area of the second heat dissipation part is larger than that of the first heat dissipation part.

In one embodiment, the body comprises a box body and a cover body, and the electric component is assembled in the box body;

one side of the box body is provided with an opening, and the cover body covers the opening and is enclosed with the box body to form a cavity.

In one embodiment, the first heat sink includes a fixing plate, the fixing plate forms a part of the box body, and the first heat sink portion and the second heat sink portion are disposed on two opposite sides of the fixing plate and are in heat conduction connection through the fixing plate.

In one embodiment, the first heat sink is a metal member as a whole.

According to another aspect of the application, an air conditioner is further provided, which comprises a complete machine shell and any one of the above electric appliance boxes, wherein the electric appliance box is arranged in the complete machine shell.

In one embodiment, the air conditioner further comprises a refrigerating system and a second fan, wherein the second fan is used for forcibly exchanging heat between the refrigerating system and the outside air;

and the second fan forms a second circulating air duct inside the whole machine shell, and the second heat dissipation part is positioned in the second circulating air duct.

In one embodiment, the second heat sink part is internally provided with a plurality of second air ducts, and the second air ducts extend along the air draft direction of the second fan and form part of the second circulating air ducts.

In one embodiment, the second heat sink part is of a metal fin structure, and a second air duct is formed between every two adjacent fins.

In one embodiment, the air conditioner further comprises a refrigerating system, the electrical box further comprises a second radiator, the second radiator comprises a heat exchange tube, and a refrigerant flows in the heat exchange tube;

one end of the heat exchange tube is communicated with the refrigerating system, and the other end of the heat exchange tube penetrates into the cavity.

Above-mentioned electrical apparatus box, the inside cavity that forms of body, first radiating part and second radiating part through first radiator, the heat transfer in the cavity and outside the cavity has been realized, even the electrical apparatus box is in encapsulated situation also can realize instant heat dissipation, and when the internal high temperature of cavity, can be outside heat transfer to the cavity through first radiator, when the internal temperature of cavity is crossed low, transmit cold volume to the cavity outside through first radiator, thereby realize the constancy of temperature in the cavity, avoid the inside condensation phenomenon because the heat that the high temperature produced gathers or the temperature crosses low production.

Drawings

Fig. 1 is a schematic perspective structural view of an electrical box according to an embodiment of the present application;

FIG. 2 is a schematic side perspective view of the appliance cartridge provided in FIG. 1;

FIG. 3 is a schematic plan view of the electrical box provided in FIG. 1;

fig. 4 is a schematic perspective view of the first and second heat sinks provided in fig. 1;

fig. 5 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.

Reference numerals are as follows: 1000. an air conditioner; 200. a second fan; 300. a compressor drive plate; 400. a whole machine shell; 100. an electrical box; 10. a body; 11. a box body; 12. a cover body; 30. a cavity; 50. a first heat sink; 51. a first heat sink member; 52. a fixing plate; 53. a second heat sink member; 60. a second heat sink; 61. a heat exchange pipe; 70. an IPM module; 80. a first fan; 81. an air outlet; 90. connecting a pipeline; a. a first air duct.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

As background art, an outdoor unit of a commercial air conditioner is generally installed in an outdoor environment, a roof environment, etc., and is greatly influenced by factors such as the environment, etc., and heat dissipation, water resistance, and condensation prevention of an electrical box for assembling electrical components such as a compressor drive plate, a fan drive plate, a filter plate, an IPM module (intelligent power module), etc., of air conditioner components have been always the key points of design.

In order to guarantee waterproof nature, avoid the electrical apparatus box to load and damp outdoors and produce the damage to power consumption part and security, the electrical apparatus box generally sets up for the leakproofness, however under the encapsulated situation, the heat dissipation of electrical apparatus box has become a new problem again, if set up the window that can open and dispel the heat, then the leakproofness suffers to destroy and produces easily and intake the problem of dirt etc. if do not open the window then at air conditioner operation in-process, the unable effluvium of heat that the power consumption part generates heat and produces, the power consumption part of electrical apparatus box inside can produce life-span reduction or even the risk of high temperature burnout in overheated environment for a long time.

In order to solve the problems, an electrical box is provided, a built-in cooling source inside the electrical box is in direct contact with an electrical component for cooling, and because air inside the sealed electrical box cannot circulate with the outside, condensation is easily generated inside the electrical box, and the electrical component is easier to burn.

In order to solve the above problems, referring to fig. 1, the present application provides an electrical box 100, which can be applied to a commercial air conditioner or an air conditioner with other applications, and can also be applied to other devices requiring the structure of the electrical box 100, so as to provide an electrical box 100 with good sealing performance, good heat dissipation effect, and capability of preventing condensation.

Specifically, referring to fig. 1 to 4, the electrical box 100 includes a body 10 and a first heat sink 50, the body 10 has a cavity 30 therein, an electrical component is assembled in the cavity 30, the first heat sink 50 includes a first heat sink portion 51 and a second heat sink portion 53 that are thermally connected, the first heat sink portion 51 is located in the cavity 30 and is thermally connected to the electrical component, and the second heat sink portion 53 is located outside the cavity 30, wherein the first heat sink 50 is configured to exchange heat between the inside of the cavity 30 and the outside of the cavity 30 through the first heat sink portion 51 and the second heat sink portion 53.

The power utilization component can be an air conditioner component such as a press drive plate, a fan drive plate, a filter plate, an IPM module 70 (intelligent power module) and the like, and can also be other control structures, and is assembled in the electrical box 100 to be used for electrically controlling the whole machine (air conditioner and the like).

In particular, the body 10 serves to provide a receiving space for the electric components, and the body 10 may take various structures. In some embodiments, the body 10 may include a first portion and a second portion that cover each other, the first portion and the second portion together defining a cavity 30 for receiving and supplying the power component. The second part can be a hollow structure with one open end, the first part can be a plate-shaped structure, and the first part covers the open side of the second part, so that the first part and the second part jointly define an accommodating space; the first part and the second part can be hollow structures with one side opened, and the opening side of the first part is covered on the opening side of the second part. Of course, the box formed by the first and second portions may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

The first heat sink part 51 of the first heat sink 50 is disposed in the cavity 30 and is thermally connected to the electric components, and heat generated by the electric components can be directly or indirectly transferred to the first heat sink part 51. The second heat sink member 53 is provided outside the cavity 30 and is connected to the second heat sink member 53 in a heat conductive manner, so that heat in the first heat sink member 51 can be transferred to the second heat sink member 53, and similarly, the second heat sink member 53 can also transfer heat to the first heat sink member 51.

So, the application provides an electrical apparatus box 100, realized in the cavity 30 with the outer heat transfer of cavity 30, when the high temperature in the cavity 30, can be through first heat dissipation portion 51 with heat transfer to second heat dissipation portion 53 outside the cavity 30 promptly, when the low temperature in the cavity 30, transmit cold volume to the cavity 30 outside through first heat dissipation portion 51, thereby realize the constancy of temperature in the cavity 30, avoid the inside heat collection or the low condensation phenomenon that produces of low temperature because the high temperature produces of electrical apparatus box 100.

It can be understood that, through the first heat sink 50, heat exchange between the inside and the outside of the cavity 30 can be realized, and at this time, no additional opening needs to be provided on the body 10 for ventilation or heat exchange, and the cavity 30 can be provided as a sealing structure, so as to avoid risks such as water or dust entering inside the electrical box 100.

Specifically, in some embodiments, the body 10 includes a box 11 and a cover 12, one side of the box 11 has an opening, the cover 12 covers the opening and encloses with the box 11 to form the cavity 30, and the box 11 and the cover 12 form the first part and the second part of the above description, respectively. When the electrical box 100 is not needed to be opened, the box body 11 and the cover 12 are buckled to form the sealed cavity 30, and when the electric components in the electrical box 100 need to be maintained or replaced, the cover 12 is opened, so that the electric components arranged in the box body 11 are maintained and replaced.

In one embodiment, the first heat sink 50 includes a fixing plate 52, the fixing plate 52 forms a part of the box 11, the first heat sink 51 and the second heat sink 53 are disposed on opposite sides of the fixing plate 52 and are connected to each other through the fixing plate 52 in a heat conducting manner, and at this time, the first heat sink 51 and the second heat sink 53 are located on opposite sides of the box 11, that is, outside the cavity 30 and the cavity 30, so that the first heat sink 51 and the second heat sink 53 can be connected to each other without damaging the structure of the box 11.

Further, in one embodiment, the first heat sink 50 is a metal member as a whole, and at this time, the first heat sink portion 51 can absorb heat generated by the electric component, and can also release the heat to the electric component, and then the heat is exchanged with the second heat sink portion 53 through the fixing plate 52.

In one embodiment, the electrical box 100 further comprises a first fan 80, the first fan 80 is disposed in the cavity 30 and configured to form a first circulating air duct in the cavity 30, and the first heat sink 51 is located in the first circulating air duct. It will be appreciated that heat generated by the electrical components will generate heated air within the cavity 30, which will rise within the appliance cartridge 100 and collect at the top of the appliance cartridge 100 when unobstructed. Through setting up first fan 80, stir the air for the air in the cavity 30 is at first circulation wind channel inner loop flow, realizes forcing the heat transfer with the first heat dissipation part 51 that is located in the first circulation wind channel with the hot-air in the cavity 30, avoids the heat to gather in electrical apparatus box 100 and can't radiate out fast.

Specifically, the air outlet 81 of the first fan 80 is disposed facing the first heat sink 51, that is, the first fan 80 directly blows air to the first heat sink 51 to perform rapid forced heat exchange.

In one embodiment, the first heat sink 51 is a metal fin structure, a first air duct a is formed between every two adjacent fins, and the first air duct a extends along the air outlet direction of the first fan 80 and forms a part of the first circulating air duct.

When the circulating air generated by the first fan 80 flows to the first heat dissipation part 51, the circulating air passes through the first air duct a between every two metal fins, and after sufficient heat exchange is performed with the metal fins on the two sides, the circulating air is recycled and drawn back by the fan, and thus the circulating heat exchange is realized in a reciprocating manner. The first air duct a is arranged, so that the first heat dissipation part 51 can have a larger heat exchange area to exchange heat with air in the cavity 30, and the heat exchange effect is improved.

In one embodiment, the electrical box 100 further comprises a second heat sink 60, the second heat sink 60 comprises a heat exchange pipe 61, the heat exchange pipe 61 penetrates from the outside of the cavity 30 to the inside of the cavity 30, and the heat exchange pipe 61 is used for flowing a heat exchange medium. When the temperature in the cavity 30 is too high, a low-temperature heat exchange medium is introduced into the heat exchange tube 61, and after the low-temperature heat exchange medium exchanges heat with a high-temperature heat source and absorbs heat, the temperature rises and flows out of the cavity 30.

It can be understood that, when the temperature in the cavity 30 is too low, a high-temperature heat exchange medium is introduced into the heat exchange tube 61, and after the high-temperature heat exchange medium exchanges heat with a low-temperature environment and absorbs heat, the temperature is reduced and the heat flows out of the cavity 30.

Thus, under the dual action of the first radiator 50 and the second radiator 60, heat exchange between the inside and the outside of the cavity 30 is realized, thereby improving the heat exchange effect.

When setting up electrical apparatus box 100 in the air conditioner, heat transfer medium can be the refrigerant, through the temperature of control refrigerant to the temperature in the regulation and control cavity 30, in other equipment, heat transfer medium also can be other media, and this application is not restricted.

In one embodiment, the power consuming components include the IPM module 70, and the IPM module 70 is an intelligent power module, and not only integrates the power switch device with the driving circuit. And fault detection circuits such as overvoltage, overcurrent and overheat are integrated in the circuit. The IPM module 70 is disposed in the cavity 30, one end of the heat exchange tube 61 is attached to the IPM module 70, the IPM module 70 serves as an electric component with a large heat generation amount, and the heat exchange tube 61 is directly attached to the IPM module 70 to directly absorb and take away heat generated by the IPM module 70 through a heat exchange medium, so as to reduce the temperature of the IPM module 70.

Further, the first heat sink 51 is connected to the IPM module 70, and at this time, heat generated by the IPM module 70 can not only exchange heat with a heat exchange medium, but also be uniformly distributed to the first heat sink 51, and is dissipated with the first heat sink 51 along with the flow of the first circulation air duct of the first fan 80, thereby accelerating the cooling of the IPM module 70.

In one embodiment, the heat dissipation area of the second heat dissipation portion 53 is larger than that of the first heat dissipation portion 51, so that the heat absorbed by the first heat dissipation portion 51 can be quickly dissipated to the outside of the cavity 30, and the heat can be prevented from being accumulated in the cavity 30.

In one embodiment, the second heat sink 53 may be set to have the same metal fin structure as the first heat sink 51, a second air duct is formed between two adjacent fins, the second fan 200 is disposed outside the cavity 30 to form a second circulating air duct, and at this time, the second air duct is a part of the second circulating air duct, and by disposing the second fan 200, air is stirred, air outside the cavity 30 is controlled to flow in the second air duct, and hot air outside the cavity 30 is forcibly heat-exchanged with the second heat sink 53, so that heat dissipation of the second heat sink 53 is completed.

The installation position of the second fan 200 needs to be arranged according to the specific use scene of the electrical box 100, which is described below.

According to another aspect of the present application, referring to fig. 5, there is provided an air conditioner 1000, which includes a whole casing 400 and the electrical box 100 of any of the above embodiments, wherein the electrical box 100 is disposed in the whole casing 400.

Specifically, the air conditioner 1000 further includes a refrigeration system and a second fan 200, and the second fan 200 is configured to forcibly exchange heat between the refrigeration system and the outside air, so as to realize the refrigeration and heating functions of the air conditioner 1000.

In addition, the second fan 200 can also form a second circulation air duct inside the whole casing 400, and the second heat dissipation part 53 is located inside the second circulation air duct, so that when the second fan 200 starts to rotate, not only can the refrigeration and heating of the refrigeration system be realized, but also the heat on the second heat dissipation part 53 can be taken away, thereby realizing the rapid heat dissipation of the electrical box 100.

Therefore, the heat dissipation of the electrical box 100 can be realized by directly using the second fan 200 of the air conditioner 1000 for forcibly exchanging heat for the refrigeration system.

In one embodiment, the second heat sink 53 has a plurality of second air ducts therein, the second air ducts extend along the air draft direction of the second fan 200 and form part of the second circulation air duct, the second circulation air duct is formed in the rotation process of the second fan 200, and heat in the second air duct inside the second heat sink 53 is extracted away in the circulation process, so that rapid heat exchange is realized.

Specifically, the second heat dissipation portion 53 is also of a metal fin structure, a second air duct is formed between every two adjacent fins, and the second air duct can be parallel to and opposite to the first air duct a, so that the first heat sink 50 can be manufactured easily.

In one embodiment, the heat exchange medium flowing through the heat exchange tube 61 of the second heat sink 60 is a refrigerant, one end of the heat exchange tube 61 penetrates into the cavity 30, and the other end of the heat exchange tube 61 is communicated with the refrigeration system, so that heat exchange with the electrical box 100 is directly realized through the refrigerant of the refrigeration system, the cost is reduced, and the structure is simple.

It can be understood that, when the temperature in the cavity 30 needs to be rapidly raised or lowered, the rotation speeds of the first fan 80 and the second fan 200 can be controlled to be increased to increase the heat exchange rate.

In some embodiments, heat exchange pipes 61 may also be arranged inside the first heat exchanging part 51 and the second heat exchanging part 53 to accelerate heat exchange.

When the air conditioner 1000 normally operates, the first fan 80 can judge whether the opening condition is met through the ambient temperature of the cavity 30 of the electrical box 100, when the refrigeration system is in refrigeration, the first fan 80 works to exchange heat between hot air in the cavity 30 and the first heat dissipation part 51, after the air passes through the first heat dissipation part 51, one part of the air is continuously conveyed to the lower electrical component for cooling, the other part of the air returns to the top of the electrical box 100 for circulation due to the first circulation air duct of the first fan 80 and the rising principle of the hot air, and the heat in the cavity 30 is continuously and uniformly and quickly transferred to the second heat dissipation part 53; then, the second fan 200 operates to remove the heat transferred from the first heat sink 51 to the second heat sink 53.

On the other hand, the refrigerant pipe of the second heat sink 60 is connected to the refrigeration system, a low-temperature refrigerant is conveyed inside, and the refrigerant circulation region is the IPM module 70, so that heat of the electric components can be effectively cooled and absorbed, and the temperature can be rapidly reduced.

When the air conditioner is in heating, the first fan 80 works to suck air at the top of the cavity 30 into the first circulating air channel, the air is sent into the first air channel a through the first circulating air channel, the IPM module 70 generates heat which is absorbed by the refrigerant pipe and evenly exchanges heat with air in the cavity 30 through the first heat dissipation part 51, the ambient temperature of the cavity 30 of the electrical box 100 rises, the temperature difference between the inside and the outside of the electrical box 100 is reduced, and therefore condensation is avoided.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (16)

1. An electrical box, comprising:

the electric heating device comprises a body (10), a heating device and a control device, wherein a cavity (30) is formed inside the body (10), and electric parts are assembled in the cavity (30); and

the first heat sink (50) comprises a first heat sink part (51) and a second heat sink part (53) which are connected in a heat conduction mode, the first heat sink part (51) is located in the cavity (30) and is connected with the electric component in a heat conduction mode, and the second heat sink part (53) is located outside the cavity (30);

wherein the first heat sink (50) is configured to exchange heat inside the cavity (30) and outside the cavity (30) through the first heat sink piece (51) and the second heat sink piece (53).

2. The appliance box according to claim 1, wherein the appliance box (100) further comprises a first fan (80), the first fan (80) being disposed within the cavity (30) and being configured to form a first circulating air duct within the cavity (30);

the first heat dissipation part (51) is positioned in the first circulating air duct.

3. The electrical box according to claim 2, characterized in that the air outlet (81) of the first fan (80) is arranged facing the first heat sink portion (51).

4. The electrical box according to claim 3, wherein the first heat sink part (51) is of a metal fin structure, a first air duct (a) is formed between every two adjacent fins, and the first air duct (a) extends along the air outlet direction of the first fan (80) and forms a part of the first circulating air duct.

5. The appliance box according to claim 1, wherein the appliance box (100) further comprises a second heat sink (60), the second heat sink (60) comprises a heat exchange pipe (61), the heat exchange pipe (61) is used for flowing a heat exchange medium, the heat exchange pipe (61) is arranged in the cavity (30) from the outside of the cavity (30) in a penetrating manner, and the heat exchange medium exchanges heat with air in the cavity (30).

6. The appliance box according to claim 5, wherein the electric component comprises an IPM module (70), the IPM module (70) is disposed in the cavity (30) and the heat exchange tube (61) is attached to the IPM module (70).

7. The appliance box of claim 6, wherein the first heat sink piece (51) is thermally conductively connected to the IPM module (70).

8. The electrical box according to any of the claims 1 to 7, wherein the heat dissipation area of the second heat sink piece (53) is larger than the heat dissipation area of the first heat sink piece (51).

9. The electrical box according to claim 1, characterized in that the body (10) comprises a box body (11) and a cover body (12), the electrical component being assembled in the box body (11);

an opening is formed in one side of the box body (11), and the cover body (12) covers the opening and surrounds the box body (11) to form the cavity (30).

10. The electrical box according to claim 9, wherein the first heat sink (50) comprises a fixing plate (52), the fixing plate (52) forms part of the box body (11), and the first heat sink portion (51) and the second heat sink portion (53) are disposed on opposite sides of the fixing plate (52) and are thermally conductively connected through the fixing plate (52).

11. The electrical box according to claim 10, characterized in that the first heat sink (50) is entirely a metal piece.

12. An air conditioner, characterized in that, comprising a whole casing (400) and the electrical box (100) of any one of claims 1-11, the electrical box (100) is arranged in the whole casing (400).

13. The air conditioner according to claim 12, wherein the air conditioner (1000) further comprises a refrigeration system and a second fan (200), the second fan (200) is used for forcibly exchanging heat between the refrigeration system and outside air;

the second fan (200) forms a second circulation air duct inside the whole housing (400), and the second heat dissipation portion (53) is located inside the second circulation air duct.

14. The air conditioner as claimed in claim 13, wherein the second heat sink (53) has a plurality of second air ducts therein, and all of the second air ducts extend in a suction direction of the second fan (200) and form part of the second circulating air ducts.

15. The air conditioner according to claim 14, wherein the second heat sink (53) is a metal fin structure, and the second air channel is formed between every two adjacent fins.

16. The air conditioner according to claim 12, wherein the air conditioner (1000) further comprises a refrigeration system, the electric appliance box (100) further comprises a second radiator (60), the second radiator (60) comprises a heat exchange pipe (61), and the heat exchange pipe (61) is used for flowing a refrigerant;

one end of the heat exchange tube (61) is communicated with the refrigerating system, and the other end of the heat exchange tube penetrates into the cavity (30).

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