Dehumidification structure of electrical equipment and electrical equipment

Abstract

The utility model relates to the technical field of electrical equipment, and provides a dehumidification structure of electrical equipment and the electrical equipment, the electrical equipment comprises a box body, an electrical component and a power supply device, the dehumidification structure of the electrical equipment comprises a refrigerator, the refrigerator is provided with a cold end and a hot end, and the refrigerator is used for being electrically connected with the power supply device; the side wall of the box body is provided with an inner concave part, the inner concave part divides the box body into a first cavity and a second cavity, the electrical component is arranged in the first cavity, the refrigerator is arranged at the second cavity, the cold end of the refrigerator faces the second cavity, and the hot end of the refrigerator deviates from the second cavity; a ventilation structure is arranged on the inner concave part; the air humidity in the second cavity can be reduced, when the external environment temperature changes rapidly, the box body generates the breathing effect, low-humidity air in the second cavity is sucked into the first cavity through the ventilation structure on the inner concave part, the protection level of the box body is guaranteed, and the service life of the box body is prolonged. And faults such as short circuit of electrical components in the first cavity can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a dehumidification structure of electric power equipment and the electric power equipment. Background Art

[0002] Power equipment such as photovoltaic inverters are used to convert the variable DC voltage generated by photovoltaic (PV) solar panels into AC power at the mains frequency, which can be fed back to the commercial power transmission system or used by off-grid power grids. The photovoltaic inverter mainly includes a box, electrical components and a breathable structure. The electrical components are installed in the box, and the breathable structure is set on the side wall of the box. When the external temperature changes rapidly, the box expands and contracts to produce a breathing effect. The air pressure inside and outside the box is balanced through the breathable structure to ensure the protection level of the inverter.

[0003] Among them, photovoltaic inverters are usually installed in areas with high humidity and high day and night temperatures. When the outside temperature changes rapidly, the high-humidity air from the outside will enter the box through the breathable structure due to the breathing effect of the box, causing excessive condensation inside the box. This condensation can cause short circuits and other fault risks in the electrical components in the box, thereby affecting the normal operation of the power equipment. Utility Model Content

[0004] The problem solved by the utility model is how to effectively reduce the generation of condensation in the shell of electric equipment.

[0005] In order to solve the above problems, the utility model provides a dehumidification structure of an electric device, which is applied to the electric device, wherein the electric device comprises a box, an electrical component and a power supply device, wherein the dehumidification structure comprises a refrigerator, wherein the refrigerator has a cold end and a hot end, and the refrigerator is used to be electrically connected to the power supply device so as to be powered by the power supply device;

[0006] A concave portion is provided on the side wall of the box body, and the concave portion divides the box body into a first cavity and a second cavity. The electrical component is arranged in the first cavity, and the refrigerator is arranged in the second cavity, and the cold end of the refrigerator faces the second cavity, and the hot end of the refrigerator faces away from the second cavity. The refrigerator is used to condense the air in the second cavity under the power supply of the power supply device;

[0007] A ventilation structure is arranged on the inner concave portion.

[0008] Optionally, the dehumidification structure of the electric equipment further includes a radiator, which is disposed on the outer wall of the box body and corresponds to the position of the electrical component, and is used to dissipate heat from the electrical component.

[0009] Optionally, the dehumidification structure of the electric equipment further includes a hydrophobic structure, and the hydrophobic structure is arranged on a side wall of the refrigerator facing the second cavity;

[0010] The hydrophobic structure is a hydrophobic plate, or the hydrophobic structure and the side wall of the second cavity are an integral structure.

[0011] Optionally, the dehumidification structure of the electric equipment further includes a heat-conducting layer, and the heat-conducting layer is arranged between the refrigerator and the hydrophobic structure, and / or the heat-conducting layer is arranged between the refrigerator and the radiator.

[0012] Optionally, the side wall of the box body is bent inwardly to form the inner recess.

[0013] Optionally, at least a portion of the hot end of the refrigerator is in contact with the heat sink.

[0014] Optionally, a groove is formed on the heat sink adjacent to the inner recess, and at least a portion of the refrigerator is located in the groove.

[0015] Optionally, the dehumidification structure of the electric equipment further includes a fan, and the fan is arranged opposite to the radiator.

[0016] Optionally, the breathable structure is a waterproof breathable valve or a waterproof breathable net.

[0017] Compared with the prior art, the dehumidification structure in the utility model includes a refrigerator, wherein an inner recess is provided on the side wall of the box body, and the inner recess can divide the entire box body into a first cavity as an inner cavity and a second cavity as an outer cavity. The second cavity is connected to the outside, and electrical components can be installed in the first cavity.

[0018] When the power supply device powers on the refrigerator, since the cold end of the refrigerator faces the second cavity and the hot end faces away from the second cavity, the heat of the second cavity is absorbed by the cold end of the refrigerator when it is powered on, so that the air in the second cavity is condensed into water vapor and discharged, thereby effectively reducing the air humidity in the second cavity; when the external ambient temperature changes rapidly, the box produces a breathing effect to suck the low-humidity air in the second cavity into the first cavity through the breathable structure on the inner recess, so as to achieve air pressure and humidity balance inside and outside the box, which not only avoids thermal expansion and contraction caused by unequal air pressure and humidity inside and outside the box, thereby ensuring the protection level of the box, but also avoids the long-term absorption of high-humidity gas in the first cavity of the box, resulting in the generation of condensed water (condensation), so as to avoid short circuit and other faults in electrical components in the first cavity, and correspondingly ensure the normal operation of the power equipment.

[0019] The utility model also provides an electric power device, comprising a box body, an electric component, a power supply device and the dehumidification structure of the electric power device as described above.

[0020] Therefore, since the power equipment includes the dehumidification structure of the power equipment, the power equipment at least has all the technical effects of the dehumidification structure of the power equipment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of the power equipment in the embodiment of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 This is a schematic diagram of the shaft side structure of the power equipment in the embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the shaft side structure of the power equipment in the embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1-box; 11-inner recess; 12-first cavity; 13-second cavity; 2-electrical components; 3-refrigerator; 4-breathable structure; 5-radiator; 6-hydrophobic structure; 7-thermal conductive layer. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] It should be noted that, in the coordinate system XYZ provided herein, the positive direction of the X axis represents the right, the reverse direction of the X axis represents the left, the positive direction of the Y axis represents the front, the reverse direction of the Y axis represents the back, the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0031] In order to solve the above technical problems, Figure 1 As shown, the embodiment of the utility model provides a dehumidification structure of an electric device, which is applied to the electric device, the electric device comprises a box 1, an electrical component 2 and a power supply device, the dehumidification structure of the electric device comprises a refrigerator 3, the refrigerator 3 has a cold end and a hot end, the refrigerator 3 is used to electrically connect the power supply device to be powered by the power supply device;

[0032] The side wall of the box body 1 is provided with an inner recess 11, and the inner recess 11 divides the box body 1 into a first cavity 12 and a second cavity 13. The electrical component 2 is arranged in the first cavity 12, and the refrigerator 3 is arranged in the second cavity 13, and the cold end of the refrigerator 3 faces the second cavity 13, and the hot end of the refrigerator 3 faces away from the second cavity 13. The refrigerator 3 is used to condense the air in the second cavity 13 under the power supply of the power supply device;

[0033] The air-permeable structure 4 is disposed on the inner concave portion 11 .

[0034] It should be noted that the power supply device can be a DC power supply for outputting DC power to the refrigerator 3. When the refrigerator 3 receives the DC power from the power supply device, the cold end of the refrigerator 3 can absorb heat from the second cavity 13, and the hot end is used to release the heat absorbed from the second cavity 13. Therefore, the refrigerator 3 can absorb the heat in the second cavity 13 to condense the air into water vapor, and the water vapor can be discharged into the environment outside the box 1 along the inner wall of the second cavity 13, thereby effectively reducing the humidity in the second cavity 13.

[0035] The inner recess 11 can be formed in the following manner, for example, by bending or stamping the side wall of the box body 1 inward to form the inner recess 11, and the inner recess 11 can divide the entire cavity of the box body 1 into a first cavity 12 and a second cavity 13, wherein the interior of the first cavity 12 is used to install the electrical component 2 (see Figure 1 and Figure 4As shown), the second cavity 13 may be a cylindrical structure with an opening, and the cylindrical structure may be a rectangular cylindrical structure or a cylindrical structure, and the second cavity 13 may discharge the condensed water vapor through the opening.

[0036] The power supply device can be installed in the first cavity 12 or outside the box 1, so the specific installation position of the power supply device is not specifically limited.

[0037] When the ambient temperature difference changes rapidly, the cold end of the refrigerator 3 reduces the air humidity in the second cavity 13, so that the box 1 draws the low-humidity air in the second cavity 13 into the first cavity 12 due to the breathing effect, thereby not only achieving the balance of air pressure and humidity inside and outside the box 1, but also effectively reducing condensation in the first cavity 12, effectively avoiding condensation from causing short circuits and other faults in electrical components 2.

[0038] The dehumidification structure in this embodiment includes a refrigerator 3, wherein an inner recess 11 is provided on the side wall of the box body 1, and the inner recess 11 can divide the entire box body 1 into a first cavity 12 as an inner cavity and a second cavity 13 as an outer cavity. The second cavity 13 is connected to the outside, and the electrical component 2 can be installed in the first cavity 12.

[0039] When the power supply device powers on the refrigerator 3, since the cold end of the refrigerator 3 faces the second cavity 13 and the hot end faces away from the second cavity 13, the heat of the second cavity 13 is absorbed by the cold end of the refrigerator 3 when it is powered on, so that the air in the second cavity 13 is condensed into water vapor and discharged, thereby effectively reducing the air humidity in the second cavity 13; when the external ambient temperature changes rapidly, the box 1 produces a breathing effect to suck the low-humidity air in the second cavity 13 into the first cavity 12 through the breathable structure 4 on the inner recess 11, so as to achieve the balance of air pressure and humidity inside and outside the box 1, which not only avoids thermal expansion and contraction caused by unequal air pressure and humidity inside and outside the box 1, and ensures the protection level of the box 1, but also avoids the long-term absorption of high-humidity gas in the first cavity 12 of the box 1 to cause condensed water (condensation), so as to avoid short circuit and other faults of the electrical components 2 in the first cavity 12, and correspondingly ensure the normal operation of the power equipment.

[0040] In one embodiment of the present invention, Figure 1 and Figure 3 As shown, the dehumidification structure of the electric equipment further includes a radiator 5 , which is arranged on the outer wall of the box body 1 and corresponds to the position of the electrical component 2 , and is used to dissipate heat from the electrical component 2 .

[0041] It should be noted that the electrical component 2 can be installed on the inner wall of the first cavity 12 of the box body 1, and the radiator 5 is installed on the outer wall of the box body 1 and corresponds to the position of the electrical component 2, so that the electrical component 2 can be quickly cooled to ensure that the electrical component 2 continues to work within an appropriate temperature range, thereby extending the service life of the electrical component 2 accordingly.

[0042] Among them, thermally conductive silicone can be arranged between the electrical component 2 and the inner wall of the first cavity 12 , so that the heat generated by the electrical component 2 can be quickly transferred to the radiator 5 through the thermally conductive silicone to further enhance the heat dissipation effect of the electrical component 2 .

[0043] The heat sink 5 may be made of a metal material, such as aluminum, aluminum alloy, etc., which is not specifically limited here.

[0044] In one embodiment of the present invention, Figure 2 As shown, the dehumidification structure of the electric equipment further includes a hydrophobic structure 6, and the hydrophobic structure 6 is arranged on the side wall of the refrigerator 3 facing the second cavity 13;

[0045] The hydrophobic structure 6 is a hydrophobic plate, or the hydrophobic structure 6 and the side wall of the second cavity 13 are an integral structure.

[0046] It should be noted that the hydrophobic structure 6 is arranged on the side wall of the refrigerator 3 facing the second cavity 13. In other words, the hydrophobic structure 6 is arranged on the left side of the refrigerator 3, that is, the hydrophobic structure 6 is closer to the second cavity 13 than the refrigerator 3. When the cold end of the refrigerator 3 condenses the air in the second cavity 13 into water vapor, the water vapor can be discharged downward from the second cavity 13 along the hydrophobic structure 6, thereby effectively improving the discharge efficiency of the water vapor in the second cavity 13.

[0047] Specifically, the bottom end of the hydrophobic structure 6 extends downward to reserve a smaller drainage port at the bottom end of the second cavity 13, which can not only reduce the air content of the outside air entering the second cavity 13 to correspondingly reduce the humidity of the second cavity 13, but also does not affect the discharge effect of the condensed water vapor in the second cavity 13 from the drainage port.

[0048] When the hydrophobic structure 6 is a hydrophobic plate, in other words, the hydrophobic structure 6 is a plate-like structure with a hydrophobic function, one end of the hydrophobic plate, for example the upper end, is connected to the side wall of the box body 1, and the other end of the hydrophobic plate, for example the bottom end, can extend downward and reserve a drain port with the bottom end of the second cavity 13, so that the condensed water vapor in the second cavity 13 can be discharged from the drain port.

[0049] When the hydrophobic structure 6 and the side wall of the second cavity 13 are an integral structure, wherein the hydrophobic structure 6 can be a hydrophobic layer arranged on the inner wall of the second cavity 13, so that the refrigerator 3 condenses the air in the second cavity 13 into water vapor, and the water vapor can be discharged outside the box 1 along the hydrophobic layer on the inner wall of the second cavity 13.

[0050] In one embodiment of the present invention, Figure 2 As shown, the dehumidification structure of the electric equipment further includes a heat-conducting layer 7 , and the heat-conducting layer 7 is arranged between the refrigerator 3 and the hydrophobic structure 6 , and / or the heat-conducting layer 7 is arranged between the refrigerator 3 and the radiator 5 .

[0051] It should be noted that when a heat-conducting layer 7 is provided between the refrigerator 3 and the hydrophobic structure 6, not only can the gap between the refrigerator 3 and the hydrophobic structure 6 be reduced to correspondingly strengthen the tightness of the connection between the two, but also the heat of the air in the second cavity 13 can be quickly transferred to the cold end of the refrigerator 3 through the hydrophobic structure 6 and the heat-conducting layer 7, thereby correspondingly improving the air condensation efficiency in the second cavity 13.

[0052] When a heat-conducting layer 7 is provided between the refrigerator 3 and the radiator 5 , the heat at the hot end of the refrigerator 3 can be quickly transferred to the radiator 5 through the heat-conducting layer 7 and diffused out, thereby correspondingly improving the heat dissipation effect on the hot end of the refrigerator 3 .

[0053] When a heat-conducting layer 7 is provided between the refrigerator 3 and the hydrophobic structure 6 , and between the refrigerator 3 and the radiator 5 , not only the air condensation efficiency in the second cavity 13 is improved, but also the heat dissipation effect on the hot end of the refrigerator 3 can be improved.

[0054] Specifically, the thermal conductive layer 7 can be silicone grease, phase change thermal conductive material, thermal conductive gel, thermal conductive pad, etc.

[0055] In one embodiment of the present invention, the side wall of the box body 1 is bent inward to form the inner recess 11 .

[0056] It should be noted that, combined with Figure 1 As shown, the side wall of the box body is bent inward, for example, to the left side, to form an inner recess 11, and the inner recess 11 can be a cylindrical inner recess or a polygonal inner recess, which is not specifically limited here.

[0057] In one embodiment of the present invention, Figure 2 As shown, at least a portion of the hot end of the refrigerator 3 is in contact with and connected to the heat sink 5 .

[0058] It should be noted that at least a portion of the hot end of the refrigerator 3 is in contact with the radiator 5, so that the hot end of the refrigerator 3 is quickly cooled by the radiator 5 to prevent the hot end of the refrigerator 3 from being burned due to excessive temperature. Since the radiator 5 is used to dissipate heat for the electrical components 2 in the first cavity 12, the electrical components 2 such as a circuit board and the hot end of the refrigerator 3 share a radiator 5, which can not only reduce the cost of the power equipment, but also ensure the long-term reliable operation of the refrigerator 3. Among them, at least a portion of the hot end means that all or part of the structure of the hot end is in contact with the surface of the radiator 5.

[0059] Among them, the refrigerator 3 can be a semiconductor refrigerator. When direct current is passed through the semiconductor refrigerator, its cold end can absorb heat and cool down, while the hot end can diffuse the absorbed heat at the cold end. This is a prior art and will not be described in detail here. It can also be other products with the function of a semiconductor refrigerator and is not specifically limited here.

[0060] In one embodiment of the present invention, a groove is formed in the heat sink 5 adjacent to the inner recess 11 , and at least a portion of the refrigerator 3 is located in the groove.

[0061] It should be noted that by providing a groove near the inner recess 11 of the radiator 5, the groove can facilitate at least a portion of the refrigerator 3 to be installed in the groove, which can not only ensure that the refrigerator 3 and the radiator 5 are fully contacted and connected for heat dissipation, but also reduce the space occupied by the refrigerator 3 to improve the space utilization of the power equipment.

[0062] Specifically, when the hydrophobic structure 6 is a hydrophobic plate, the hydrophobic structure 6, the heat-conducting layer 7 and at least a portion of the refrigerator 3 may all be disposed in the above-mentioned groove.

[0063] The heat sink 5 being close to the inner recess 11 means that the heat sink 5 is provided with the groove at a position close to the side wall of the inner recess 11, for example Figure 1 A groove is formed at the lower portion of the left side wall of the middle radiator 5 .

[0064] Combination Figure 1 and Figure 2 As shown, the upper structure of the refrigerator 3 is in the groove, and the lower structure is below the radiator; of course, the entire structure of the refrigerator 3 can be in the groove, and no specific limitation is made here.

[0065] In one embodiment of the present invention, the dehumidification structure of the electric equipment further includes a fan, and the fan is arranged opposite to the radiator 5 .

[0066] It should be noted that when the electrical equipment is running at high power, if the radiator 5 cannot meet the heat dissipation requirements of the hot ends of the electrical components 2 and the refrigerator 3, the fan can be controlled to force air to blow on the radiator 5 to enhance the heat dissipation effect of the radiator 5.

[0067] For example, the fan is arranged opposite to the fins of the radiator 5 to blow air to the fins to accelerate the heat dissipation effect of the radiator.

[0068] In one embodiment of the present invention, the breathable structure 4 is a waterproof breathable valve or a waterproof breathable net.

[0069] It should be noted that if the breathable structure 4 is a waterproof breathable valve, the waterproof breathable valve is a valve that can adjust the pressure difference between inside and outside the installation area to achieve the dual functions of waterproof and breathable, wherein the breathable function of the waterproof breathable valve means that the waterproof breathable valve has a microporous structure, which can allow liquid to penetrate and allow gas to pass through. When the external air pressure is higher than the internal air pressure, the valve closes the micropores to prevent moisture from entering. Conversely, when the internal air pressure is higher than the external air pressure, the valve opens the micropores to discharge moisture from the inside to achieve a breathable effect; the waterproof function of the waterproof breathable valve means that when it is in a closed state, its outer layer is coated with a waterproof film, which can effectively prevent liquid from penetrating, ensuring that the waterproof breathable valve can still play a waterproof role in extreme environments.

[0070] If the breathable structure 4 is a waterproof breathable net, such as a waterproof breathable mesh cloth or a waterproof breathable membrane, any waterproof breathable net that has dual functions of waterproofing and breathability is applicable to the present technical solution and will not be described in detail herein.

[0071] Another embodiment of the utility model provides an electric power device, comprising a box body 1, an electric component 2, a power supply device and the dehumidification structure of the electric power device as described above.

[0072] It should be noted that the power equipment can be a photovoltaic inverter, or other outdoor equipment with a circuit board, which is not specifically limited here; when the power equipment is a photovoltaic inverter, it includes multiple electrical components 2, and the multiple electrical components 2 can be power modules, circuit breakers, circuit boards, inductors, filters, etc.; the power supply device is used to provide direct current to the refrigerator 3, so that the refrigerator 3 can generate a Peltier effect, so that the heat of the refrigerator 3 is transferred from one end to the other end, so that one end of the refrigerator 3 is cooled (forming a cold end) and the other end is heated (forming a hot end).

[0073] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A dehumidification structure for electric power equipment, applied to electric power equipment, the electric power equipment comprising a box (1), an electrical component (2) and a power supply device, characterized in that: The dehumidification structure of the electric equipment comprises a refrigerator (3), the refrigerator (3) having a cold end and a hot end, and the refrigerator (3) is used to be electrically connected to the power supply device so as to be powered by the power supply device; An inner recess (11) is provided on the side wall of the box body (1), and the inner recess (11) divides the box body (1) into a first cavity (12) and a second cavity (13); the electrical component (2) is arranged in the first cavity (12); the refrigerator (3) is arranged in the second cavity (13), and the cold end of the refrigerator (3) faces the second cavity (13), and the hot end of the refrigerator (3) faces away from the second cavity (13); the refrigerator (3) is used to condense the air in the second cavity (13) under the power supply of the power supply device; A breathable structure (4) is provided on the inner recess (11).

2. The dehumidification structure of the electric power equipment according to claim 1, characterized in that: It also includes a radiator (5), which is arranged on the outer wall of the box body (1) and corresponds to the position of the electrical component (2) and is used to dissipate heat for the electrical component (2).

3. The dehumidification structure of the electric power equipment according to claim 2, characterized in that: It also comprises a hydrophobic structure (6), wherein the hydrophobic structure (6) is arranged on a side wall of the refrigerator (3) facing the second cavity (13); The hydrophobic structure (6) is a hydrophobic plate, or the hydrophobic structure (6) and the side wall of the second cavity (13) are an integral structure.

4. The dehumidification structure of the electric power equipment according to claim 3, characterized in that: It also comprises a heat-conducting layer (7), wherein the heat-conducting layer (7) is arranged between the refrigerator (3) and the hydrophobic structure (6), and / or the heat-conducting layer (7) is arranged between the refrigerator (3) and the radiator (5).

5. The dehumidification structure of the electric power equipment according to claim 2, characterized in that: The side wall of the box body (1) is bent inwardly to form the inner recess (11).

6. The dehumidification structure for electric power equipment according to any one of claims 2 to 5, characterized in that: At least part of the hot end of the refrigerator (3) is in contact with the heat sink (5).

7. The dehumidification structure of the electric power equipment according to claim 6, characterized in that: The heat sink (5) is provided with a groove adjacent to the inner recess (11), and at least a portion of the refrigerator (3) is located in the groove.

8. The dehumidification structure of the electric power equipment according to claim 6, characterized in that: It also includes a fan, which is arranged opposite to the radiator (5).

9. The dehumidification structure of the electric power equipment according to claim 6, characterized in that: The air-permeable structure (4) is a waterproof air-permeable valve or a waterproof air-permeable net.

10. An electric power device, characterized in that: The invention comprises a housing (1), an electrical component (2), a power supply device and a dehumidification structure of an electric power equipment as claimed in any one of claims 1 to 9.

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