Gas tank convenient for heat dissipation and gas-filled cabinet

Abstract

The invention belongs to the field of switch devices, and particularly relates to a gas tank convenient for heat dissipation and a gas-insulated switchgear. In order to improve the heat dissipation effect of the gas tank, the invention provides the gas tank convenient to dissipate heat. The air box comprises a box body with a closed air chamber and an air channel communicated with the closed air chamber, the air channel is provided with a fan, at least one part, located outside the box body, of the air channel is arranged in a winding mode to form a winding part, and the winding part comprises at least two parallel sections parallel to each other and a connecting section connecting the two adjacent parallel sections; at least one connecting section forms a fan mounting section, the fan is mounted in the fan mounting section, the air outlet direction of the fan is perpendicular to the parallel section, and the through-flow area of the parallel section is smaller than that of the fan mounting section. The invention also provides a gas-insulated switchgear comprising the gas tank. The fan is installed in the fan installation section, so that it is guaranteed that the parallel section has a small through-flow area, the specific surface area of the part, located outside the box body, of the air channel is increased, and then the heat dissipation area and the heat dissipation effect are improved.

Description

Technical Field

[0001] The invention belongs to the field of switch devices, and in particular relates to an air box and an inflatable cabinet which are convenient for heat dissipation. Background Art

[0002] The gas cabinet includes a gas box and an electrical mechanism installed on the gas box. The electrical mechanism can be a load switch, a three-position mechanism, a circuit breaker mechanism, etc. The gas box is filled with insulating gas to meet the insulation requirements of the above electrical mechanisms. In the earlier gas cabinets (medium-voltage gas-insulated metal-enclosed switchgear), the cooling air is generally blown directly to the outer wall of the gas box to cool the gas box. This cooling method has a low cooling efficiency. As the current level of the gas cabinet continues to increase, the heat generated by the part of the electrical mechanism located in the gas box gradually increases. The above cooling method can no longer meet the cooling requirements at this stage.

[0003] To solve the above problems, a Chinese invention patent application with application publication number CN117767148A and application publication date 2024.03.26 discloses an environmentally friendly inflatable cabinet circulating heat dissipation system and a heat dissipation method thereof. The heat dissipation system includes an air box and a heat dissipation pipe (equivalent to an air duct) installed on the air box. The air box has a closed air chamber. The two ends of the heat dissipation pipe are respectively connected to the upper and lower parts of the air chamber, and one end of the heat dissipation pipe for air intake is connected to a fan (that is, the fan is arranged at the air inlet of the heat dissipation pipe), and the fan is located in the closed air chamber.

[0004] In the above invention patent, since the section of the heat dissipation pipe outside the air box is a straight pipe, the heat dissipation area of ​​the straight pipe is small, resulting in poor heat dissipation effect of the air box.

[0005] It should be noted that the Chinese utility model patent with authorization announcement number CN222484068U and authorization announcement date 2025.02.14 discloses an electrical switch cabinet, which includes a cabinet body with a closed air chamber, an internal circulation air duct and an internal circulation fan. Electrical components are arranged in the cabinet body, and the two ends of the internal circulation air duct are respectively connected to the closed air chamber. The internal circulation fan is arranged at the air inlet of the internal circulation air duct. The part of the internal circulation air duct located outside the cabinet body is a winding structure to improve the heat dissipation efficiency and isolate external dust, water vapor and oil.

[0006] In the above utility model patent, on the one hand, the electrical switch cabinet is not an air box, so the gas in the internal circulation air duct and the closed air chamber is air; on the other hand, the internal circulation fan is arranged at the air inlet of the internal circulation air duct, which leads to a larger diameter of the internal circulation air duct. Under the premise that the space occupied by the serpentine structure is certain, the larger the diameter of the internal circulation air duct, the smaller the surface area of ​​the internal circulation air duct, that is, the smaller the heat dissipation area of ​​the internal circulation air duct, which affects the heat dissipation effect. Summary of the invention

[0007] The purpose of the present invention is to provide an air box that is easy to dissipate heat, so as to solve the technical problem that the existing air box has poor heat dissipation effect.

[0008] The present invention also aims to provide an inflatable cabinet to solve the same technical problem as above.

[0009] To achieve the above purpose, the technical solution of the air box for heat dissipation provided by the present invention is: An air box for heat dissipation comprises a box body with a closed air chamber and an air duct installed on the box body, the air duct comprises an air inlet and an air outlet connected to the closed air chamber, and the air duct is provided with a fan for driving the gas to circulate between the closed air chamber and the air duct, at least a portion of the air duct outside the box body is arranged in a winding manner to form a winding portion, the winding portion comprises at least two parallel sections parallel to each other and a connecting section connecting two adjacent parallel sections; at least one connecting section constitutes a fan installation section, the fan is installed in the fan installation section, and the air outlet direction of the fan is perpendicular to the parallel section, and the flow area of ​​the parallel section is smaller than the flow area of ​​the fan installation section.

[0010] Furthermore, the flow area of ​​the fan installation section is larger than the flow area of ​​the connecting section.

[0011] Furthermore, in the air outlet direction of the fan, the width of the fan is smaller than the distance between two adjacent parallel sections, and the fan is located between the extension lines of the two parallel sections.

[0012] Furthermore, an inspection opening for inspecting the fan is provided on the fan installation section, and a sealing plate for sealing the inspection opening is detachably installed on the fan installation section.

[0013] Furthermore, the air passage is arranged on the top wall of the box body, and the inspection port is located at the top of the connecting section.

[0014] Furthermore, the fan mounting section has a through hole, on which is installed a plug-in device for sealing with the through hole, one end of the plug-in device is located inside the fan mounting section and electrically connected to the fan, and the other end is located outside the fan mounting section and is used to be electrically connected to the control device.

[0015] Furthermore, the end of the air passage extends into the sealed air chamber of the box body, the air outlet is located at the lower part of the sealed air chamber, and the air inlet is located at the upper part of the sealed air chamber.

[0016] Furthermore, the air inlet and the air outlet are respectively located at two diagonally opposite corners of the box body.

[0017] Furthermore, a heat sink is provided on the outer wall of the portion of the air passage outside the box.

[0018] The beneficial effect of the air box of the present invention that is convenient for heat dissipation is that the present invention is an invention creation with changed elements. The main difference between the present invention and the prior art is that in the prior art, a section of the heat dissipation pipe located outside the air box is a straight pipe, and the fan is arranged at the air inlet of the heat dissipation pipe, while in the present invention, at least a part of the air duct located outside the box is a winding part, and the fan is arranged in the fan installation section, thereby ensuring that the parallel section has a smaller flow area, thereby increasing the ratio of the surface area to the volume of the winding part, increasing the heat dissipation area of ​​the air duct, and improving the heat dissipation effect of the air box.

[0019] In actual use, the fan is turned on, and the insulating gas circulates between the closed air chamber and the air duct. The part of the air duct outside the box simultaneously exchanges heat with the external cooling gas and the insulating gas inside itself, thereby reducing the temperature of the insulating gas inside itself, and then reducing the temperature of the insulating gas in the closed air chamber. At the same time, because the air duct has a winding part and the fan is located in the fan installation section, the flow area of ​​the parallel section is smaller than the flow area of ​​the fan installation section, so the specific surface area (the ratio of surface area to volume) of the parallel section is larger, and the air duct has a larger heat dissipation area, which is conducive to reducing the temperature of the insulating gas in the air duct and improving the heat dissipation effect of the air box.

[0020] To achieve the above purpose, the technical solution of the inflatable cabinet provided by the present invention is: An inflatable cabinet includes an air box with an electrical mechanism installed on the air box. The air box includes a box body with a closed air chamber and an air duct installed on the box body. The air duct includes an air inlet and an air outlet connected to the closed air chamber, and the air duct is provided with a fan for driving the gas to circulate between the closed air chamber and the air duct. At least a portion of the air duct outside the box body is arranged in a winding manner to form a winding portion, and the winding portion includes at least two parallel sections parallel to each other and a connecting section connecting two adjacent parallel sections; at least one connecting section constitutes a fan installation section, and a fan is installed in the fan installation section, and the air outlet direction of the fan is perpendicular to the parallel section, and the flow area of ​​the parallel section is smaller than the flow area of ​​the fan installation section.

[0021] Furthermore, the flow area of ​​the fan installation section is larger than the flow area of ​​the connecting section.

[0022] Furthermore, in the air outlet direction of the fan, the width of the fan is smaller than the distance between two adjacent parallel sections, and the fan is located between the extension lines of the two parallel sections.

[0023] Furthermore, an inspection opening for inspecting the fan is provided on the fan installation section, and a sealing plate for sealing the inspection opening is detachably installed on the fan installation section.

[0024] Furthermore, the air passage is arranged on the top wall of the box body, and the inspection port is located at the top of the connecting section.

[0025] Furthermore, the fan mounting section has a through hole, on which is installed a plug-in device for sealing with the through hole, one end of the plug-in device is located inside the fan mounting section and electrically connected to the fan, and the other end is located outside the fan mounting section and is used to be electrically connected to the control device.

[0026] Furthermore, the end of the air passage extends into the sealed air chamber of the box body, the air outlet is located at the lower part of the sealed air chamber, and the air inlet is located at the upper part of the sealed air chamber.

[0027] Furthermore, the air inlet and the air outlet are respectively located at two diagonally opposite corners of the box body.

[0028] Furthermore, a heat sink is provided on the outer wall of the portion of the air passage outside the box.

[0029] The beneficial effects of the inflatable cabinet of the present invention are as follows: the present invention is an improved invention creation. By arranging the fan in the fan installation section, the winding part is ensured to have a larger specific surface area, the heat dissipation area of ​​the airway is increased, and the heat dissipation capacity of the air box is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of an air box and an electrical mechanism for heat dissipation according to the present invention from one perspective; Figure 2 A schematic structural diagram of the air box and the electrical mechanism for heat dissipation of the present invention from another perspective; Figure 3 A left side schematic diagram of an air box and an electrical mechanism for heat dissipation of the present invention; Figure 4 A rear view schematic diagram of an air box and an electrical mechanism for heat dissipation of the present invention; Figure 5 A schematic structural diagram of an air box for heat dissipation according to the present invention from one perspective; Figure 6 A schematic structural diagram of the air box for heat dissipation of the present invention from another perspective; Figure 7 A schematic structural diagram of the air box for heat dissipation of the present invention from another perspective; Figure 8 for Figure 5 A schematic diagram of the structure of the heat sink; Fig. 9 for Figure 5 A schematic diagram of the main view of the heat sink; Fig.10 for Figure 5 A schematic diagram of the structure of the middle airway and the box at an angle; Fig.11 for Figure 5 A schematic diagram of the structure of the middle airway and the box from another angle; Fig.12 for Figure 5 Schematic diagram of the structure of the middle sealing plate; Fig.13 for Figure 5 Schematic diagram of the structure of the medium blower; Fig.14 for Figure 5 A schematic diagram of the structure before the middle plug-in device is installed; Fig.15 for Figure 5 A schematic diagram of the structure after the middle plug-in device is installed; Fig.16 A schematic diagram of the gas flow direction of the air box for heat dissipation of the present invention; Fig.17 A schematic diagram of the gas flow direction in the box body of the air box for heat dissipation of the present invention; Fig.18 The figure is a schematic diagram of the gas flow in the air passage of the air box for heat dissipation of the present invention.

[0031] Description of reference numerals: 1. Box body; 2. Circuit breaker mechanism; 3. Three-station mechanism; 4. Air duct; 41. Parallel section; 42. Connecting section; 43. Fan installation section; 44. Air inlet; 45. Air outlet; 5. Heat sink; 51. First stud perforation; 6. Closing plate; 61. Second stud perforation; 62. First sealing ring; 7. Fan; 8. Plug-in device; 81. Assembly section; 82. Sealing matching section; 83. Installation groove; 84. Second sealing ring; 85. Matching nut. DETAILED DESCRIPTION

[0032] In order to solve the problems in the background technology, the core inventive concept of the present invention is: in the part where the air duct is arranged in a winding manner, by installing the fan in the non-parallel section, thereby ensuring that the parallel section has a smaller flow area, the specific surface area of ​​the part of the air duct located outside the box is increased, thereby increasing the heat dissipation area and the heat dissipation effect.

[0033] To facilitate those skilled in the art to understand the present invention, two related patents similar to the present invention are provided below.

[0034] A Chinese utility model patent with authorization announcement number CN219677929U and authorization announcement date 2023.09.12 discloses a forced circulation heat dissipation type closed switch cabinet, which includes a gas circulation flow channel, and the gas circulation flow channel includes a connected gas box (the space in the gas box forms a fully enclosed air chamber), a first ball valve, a first fan sealing box, a grille-type heat sink, a second fan sealing box and a second ball valve. A fan is provided in the fan sealing box for driving the gas to reciprocate in the gas circulation flow channel.

[0035] For the above-mentioned switch cabinet, the insulating gas is circulated by a fan and cooled by a grille-type heat sink, thereby improving the heat dissipation effect. However, since the grille-type heat sink is arranged on the side of the air box, and a fan sealing box and a ball valve are provided between the grille-type heat sink and the air box, the switch cabinet also includes a bracket for supporting the grille-type heat sink, which results in a larger footprint.

[0036] A Chinese utility model patent with authorization announcement number CN222338875U and authorization announcement date 2025.01.10 discloses a ring main unit air box that is easy to dissipate heat. The air box includes a cabinet body with a closed air chamber. A heat exchange component is provided on the top wall of the cabinet body. The heat exchange component includes an air pump and a plate-fin heat exchanger. The plate-fin heat exchanger is connected to the closed air chamber. The air pump is used to circulate the insulating gas between the plate-fin heat exchanger and the closed air chamber.

[0037] In the above-mentioned air box, the heat dissipation effect of the air box is improved by using a plate-fin heat exchanger. At the same time, the air pump and the plate-fin heat exchanger are arranged on the top wall of the box body, thereby reducing the floor space of the air box.

[0038] Similar to the present invention, the air boxes of the above two utility model patents are both equipped with electrical mechanisms, which will not be described in detail here.

[0039] The present invention is further described in detail below in conjunction with embodiments.

[0040] Specific embodiments of the air box for heat dissipation provided by the present invention: like Figures 1 to 18 As shown, as a basic specific implementation method, the air box for heat dissipation includes a box body 1 with a closed air chamber and an air duct 4 installed on the box body 1, the air duct 4 includes an air inlet 44 and an air outlet 45 connected to the closed air chamber, and the air duct 4 is provided with a fan 7 for driving the gas to circulate between the closed air chamber and the air duct 4, at least a portion of the air duct 4 located outside the box body 1 is arranged in a winding manner to form a winding portion, the winding portion includes at least two parallel sections 41 parallel to each other and a connecting section 42 connecting two adjacent parallel sections 41; at least one connecting section 42 constitutes a fan installation section 43, the fan 7 is installed in the fan installation section 43, and the air outlet direction of the fan 7 is perpendicular to the parallel section 41, and the flow area of ​​the parallel section 41 is smaller than the flow area of ​​the fan installation section 43.

[0041] Among them, the box body 1 is made of a metal material commonly used in the art (such as aluminum or stainless steel), and the box body 1 is filled with high-voltage insulating gas. The material of the air duct 4 is an aluminum material commonly used in the art. The thermal conductivity of aluminum is relatively high, which is beneficial to promote the heat exchange between the external cooling gas and the insulating gas and the air duct. In actual manufacturing, the air duct 4 can be welded by multiple aluminum plates, and the air duct 4 can be welded to the box body 1 to achieve sealing at the connection between the air duct 4 and the box body 1.

[0042] Among them, in the extension direction of the parallel section 41, a card slot is provided on the fan mounting section 43, and a card block matching the card slot is provided on the shell of the fan 7, and the fan 7 is connected to the fan mounting section 43; or, referring to the Chinese utility model patent with authorization announcement number CN219677929U, the specific method of installing the fan 7 in the fan mounting section 43 can be the same as the specific method of installing the fan in the fan sealing box, which will not be repeated here.

[0043] Among them, Figures 1 to 4 In the embodiment, the box 1 is in the shape of two rectangular blocks superimposed on each other. Figures 5 to 7 , 10-11 and 16-18, in order to facilitate the representation of the box 1, the box 1 is illustrated as a rectangular parallelepiped. In the present invention, those skilled in the art can design the shape of the box 1 according to actual conditions. The present invention does not improve the shape of the box 1. The shape of the box 1 is the prior art. For example, the shape of the box 1 can be the same as the shape of the box 1 in any patent document cited in the present invention, and will not be repeated here.

[0044] Preferably, if Figures 1 to 7 As shown, the portion of the air passage 4 outside the housing 1 is entirely composed of a winding portion, thereby maximizing the contact area between the air passage 4 and the external cooling air.

[0045] In other specific embodiments, the portion of the air duct 4 outside the housing 1 may also partially constitute a winding portion. In this case, the air duct 4 also has a larger contact area with the external cooling air.

[0046] According to actual conditions, the number of parallel sections 41 can also be two, three or more. According to the number of fans 7, the number of fan installation sections 43 can also be one, two or more. Technical personnel in this field can set the number of parallel sections 41, fans 7 and fan installation sections 43 according to actual needs, which will not be repeated here.

[0047] In the present invention, at least a portion of the air duct 4 located outside the box body 1 is a winding portion, and the fan 7 is located in the fan installation section 43, thereby ensuring that the parallel section 41 has a smaller flow area, thereby increasing the specific surface area (the ratio of surface area to volume) of the winding portion, increasing the heat dissipation area of ​​the air duct 4, and improving the heat dissipation effect of the air box.

[0048] In actual use, the fan 7 is turned on, and the insulating gas circulates between the closed air chamber and the air duct 4. The part of the air duct 4 located outside the box 1 exchanges heat with the external cooling gas and the insulating gas inside itself at the same time, thereby reducing the temperature of the insulating gas inside itself, and then reducing the temperature of the insulating gas in the closed air chamber. At the same time, since the air duct 4 has a winding part, and the fan 7 is located in the fan installation section 43, the flow area of ​​the parallel section 41 is smaller than the flow area of ​​the fan installation section 43, so the specific surface area of ​​the parallel section 41 is larger, and the air duct 4 has a larger heat dissipation area, which is conducive to reducing the temperature of the insulating gas in the air duct 4 and improving the heat dissipation effect of the air box.

[0049] In a specific implementation, the flow area of ​​the fan installation section 43 is equal to the flow area of ​​the connecting section 42, and the structure is simple.

[0050] Preferably, as an improved specific implementation method, Figure 5 As shown, the flow area of ​​the fan installation section 43 is larger than the flow area of ​​the connecting section 42. Limited by the size of the fan 7, the fan installation section 43 must have a certain flow area. By reducing the flow area of ​​the connecting section 42, the surface area of ​​the parallel section 41 adjacent to the connecting section 42 can be increased, thereby increasing the heat dissipation area of ​​the entire air duct 4 and improving the heat dissipation effect.

[0051] Specifically, Figure 5 As shown, the flow area of ​​the fan mounting section 43 is larger, and the flow area of ​​the connecting section 42 is smaller. The surface area of ​​the fan mounting section 43 is larger than the surface area of ​​the connecting section 42, but the surface areas of the two parallel sections 41 adjacent to the fan mounting section 43 are smaller, while the surface areas of the two parallel sections 41 adjacent to the connecting section 42 are larger, resulting in the sum of the surface area of ​​the fan mounting section 43 and the surface area of ​​the corresponding parallel sections 41 being smaller than the sum of the surface area of ​​the connecting section 42 and the surface area of ​​the corresponding parallel sections 41.

[0052] Preferably, as an improved specific implementation, in the air outlet direction of the fan 7, the width of the fan 7 is smaller than the distance between two adjacent parallel sections 41, and the fan 7 is located between the extension lines of the two parallel sections 41, thereby ensuring that there is a large space on both sides of the axial direction of the fan 7, which is conducive to reducing the turbulence on both sides of the axial direction of the fan 7, so that the insulating gas flows smoothly in the air duct 4. At the same time, the power of the fan 7 is relatively small, which saves energy and is conducive to reducing the heat generated by the fan 7.

[0053] In other specific implementations, in the air outlet direction of the fan 7 , the width of the fan 7 is greater than the distance between two adjacent parallel sections 41 .

[0054] When the shape of the air duct 4 remains unchanged, the size of the fan 7 is larger, so the power of the fan 7 is larger, but since the space on both sides of the axial direction of the fan 7 is smaller, on the one hand, on the upstream side of the fan 7, the flow area of ​​the parallel section 41 is larger, but the flow area between the fan 7 and the corresponding inner wall of the fan mounting section 43 is smaller, resulting in that the insulating gas is not easy to enter between the fan 7 and the corresponding inner wall of the fan mounting section 43; on the other hand, on the downstream side of the fan 7, the distance between the fan 7 and the corresponding inner wall of the fan mounting section 43 is smaller, and the insulating gas will move in the opposite direction after hitting the corresponding inner wall, affecting the flow of the insulating gas in the air duct 4.

[0055] When the shape of the fan 7 remains unchanged, in addition to the above problems, the following beneficial effects are also achieved: the length of the connecting section 42 is shortened, and the distance between two adjacent parallel sections 41 is closer, so that more parallel sections 41 can be provided, and the specific surface area of ​​the airway is increased. At this time, it should be noted that the two parallel sections 41 should not be too close to each other, so as to ensure that the external cooling gas can take away the heat accumulated between the two parallel sections 41.

[0056] In order to facilitate maintenance of the fan 7, preferably, as an improved specific implementation, an inspection port for inspecting the fan 7 is provided on the fan installation section 43, and a sealing plate 6 for sealing the inspection port is detachably installed on the fan installation section 43. When inspection is required, the sealing plate 6 is removed and the fan 7 is inspected through the inspection port. After the inspection is completed, the sealing plate 6 is reinstalled on the fan installation section 43.

[0057] like Figures 5 and 6 and Fig.12 As shown, the sealing plate 6 is provided with a second stud through-hole 61, and a corresponding welding stud is welded on the fan installation section 43. The welding stud passes through the second stud through-hole 61 and is threadedly connected with the nut. A first sealing ring 62 is installed on the sealing plate 6, and the first sealing ring 62 is located inside the figure surrounded by all the second stud through-holes 61, and the first sealing ring 62 is squeezed between the sealing plate 6 and the fan installation section 43 to ensure the airtightness between the fan installation section 43 and the sealing plate 6.

[0058] Preferably, if Figures 5 and 6As shown, as an improved specific implementation, the air duct 4 is arranged on the top wall of the box body 1, and the inspection port is located at the top of the connecting section 42. Compared with the technical solution that the air duct 4 is not arranged on the outer wall surface of the box body 1 (for example, the Chinese utility model patent with the authorization announcement number CN219677929U), the air duct 4 is arranged on the outer wall surface of the box body 1, so that no additional supporting structure is required, and the structure is simple; compared with the technical solution that the air duct 4 is arranged on the front and rear side walls of the box body 1, by arranging the air duct 4 on the top wall of the box body 1, on the one hand, the floor space of the air box can be reduced, and on the other hand, the inflatable cabinet contains multiple air boxes, and the multiple air boxes can be arranged closely in the front and rear directions, and the rear side wall of the front air box contacts the front side wall of the rear air box, thereby reducing the floor space of the entire inflatable cabinet.

[0059] Since the air duct 4 is located on the top wall of the box body 1, the staff can inspect the fan 7 from the top of a single air box, that is, the inspection port will not be blocked by other air boxes on the front and rear sides of the air box, which is convenient for the staff to inspect the fan 7 through the inspection port. At the same time, compared with the technical solution of setting the inspection port on the left (right) side of the fan installation section 43, setting the inspection port on the top of the fan installation section 43 is also convenient for the staff to inspect the fan 7, avoiding other mechanisms on the left (right) side from affecting the staff's inspection of the fan 7.

[0060] In a specific embodiment, Figure 5 and Figures 14 and 15 As shown, the fan installation section 43 has a through hole, and a plug-in device 8 for sealing with the through hole is installed on the through hole. One end of the plug-in device 8 is located inside the fan installation section 43 and is electrically connected to the fan 7, and the other end is located outside the fan installation section 43 and is used to be electrically connected to the control device.

[0061] Specifically, the plug-in device 8 includes an electrically connected inner connector and an outer connector, which are cast as a whole through epoxy resin. The fan 7 is electrically connected to the inner connector, and the outer connector is electrically connected to the control device, so that the control device can control the working state of the motor. At the same time, the control device can also supply power to the fan 7.

[0062] To ensure the seal between the plug-in device 8 and the fan mounting section 43, the plug-in device 8 includes a sealing mating section 82 with a larger diameter and an assembly section 81 with a smaller diameter. The sealing mating section 82 is provided with an installation groove 83 for installing a second sealing ring 84, and the assembly section 81 is provided with an external thread. After the assembly section 81 is inserted into the through hole, it is threadedly connected with the mating nut 85 so that the second sealing ring 84 is squeezed between the sealing mating section 82 and the fan mounting section 43, thereby achieving the seal between the plug-in device 8 and the fan mounting section 43.

[0063] In the closed air chamber of the box body 1, since the insulating gas will move upward after being heated, preferably, the end of the air duct 4 extends into the closed air chamber of the box body 1, the air outlet 45 is located at the lower part of the closed air chamber, and the air inlet 44 is located at the upper part of the closed air chamber, so that the hotter insulating gas can enter the air duct 4 and the cooler insulating gas can fully cool down the mechanism in the box body 1.

[0064] In other specific implementations, referring to the Chinese utility model patent with authorization announcement number CN222484068U, the air inlet 44 can also be located at the lower part of the sealed air chamber, and the air outlet 45 can be located at the upper part of the sealed air chamber.

[0065] Preferably, in a specific embodiment, the air inlet 44 and the air outlet 45 are respectively located at two diagonally opposite corners of the box body 1. Figure 5 As shown, the air inlet 44 is located at the upper left corner of the box body 1, and the air outlet 45 is located at the lower right corner of the box body 1. Fig.17 As shown, the insulating gas flowing out of the gas outlet 45 can move along the diagonal of the sealed air chamber, so that as much insulating gas as possible in the sealed air chamber can flow, thereby improving the heat dissipation effect.

[0066] In other specific embodiments, the air inlet 44 is located at the upper left corner of the box body 1, and the air outlet 45 is located at the lower left corner of the box body 1. At this time, the fluidity of the insulating gas in the left half of the closed air chamber is better, but the fluidity of the insulating gas in the right half of the closed air chamber is poor, resulting in that the insulating gas in the right half of the closed air chamber rarely enters the airway 4, thereby causing the temperature of the mechanism in the right half of the closed air chamber to be higher.

[0067] In a specific embodiment, no heat sink 5 is provided on the air duct 4. To further improve the heat dissipation effect, preferably, as an improved specific embodiment, a heat sink 5 is further provided on the outer wall of the air duct 4 located outside the box body 1.

[0068] Specifically, Figure 5 and Figures 8 and 9 As shown, a first stud through hole 51 is provided on the heat sink 5, and a welding stud corresponding to the first stud through hole 51 is welded on the air duct 4. The welding stud passes through the first stud through hole 51 and is threadedly connected with the nut.

[0069] The specific embodiment of the inflatable cabinet provided by the present invention is as follows: Reference Figures 1 to 18 As shown, the inflatable cabinet includes an air box and an electrical mechanism installed on the air box, wherein the electrical mechanism can be an electrical mechanism such as a circuit breaker mechanism 2, a three-position mechanism 3 or a load switch, and the air box is any one of the specific embodiments of the air box for easy heat dissipation of the present invention, which will not be repeated here.

[0070] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein, or organically combine different specific implementations to combine the specific implementations given in the accompanying drawings. Of course, those skilled in the art can also combine the specific implementations not given in the other drawings of the specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air box for heat dissipation, characterized in that: The invention comprises a box body having a sealed air chamber and an air duct installed on the box body, the air duct comprises an air inlet and an air outlet connected to the sealed air chamber, and the air duct is provided with a fan for driving the gas to circulate between the sealed air chamber and the air duct, at least a portion of the air duct outside the box body is arranged in a winding manner to form a winding portion, the winding portion comprises at least two parallel sections parallel to each other and a connecting section connecting two adjacent parallel sections; at least one connecting section constitutes a fan installation section, the fan is installed in the fan installation section, and the air outlet direction of the fan is perpendicular to the parallel section, and the flow area of ​​the parallel section is smaller than the flow area of ​​the fan installation section.

2. The air box for heat dissipation as claimed in claim 1, characterized in that: The flow area of ​​the fan installation section is larger than the flow area of ​​the connecting section.

3. The air box for heat dissipation as claimed in claim 1, characterized in that: In the air outlet direction of the fan, the width of the fan is smaller than the distance between two adjacent parallel sections, and the fan is located between the extension lines of the two parallel sections.

4. The air box for heat dissipation as claimed in claim 1, characterized in that: An inspection opening for inspecting the fan is provided on the fan installation section, and a sealing plate for sealing the inspection opening is detachably installed on the fan installation section.

5. The air box for heat dissipation as claimed in claim 4, characterized in that: The air duct is arranged on the top wall of the box body, and the inspection port is located at the top of the connecting section.

6. The air box for heat dissipation according to any one of claims 1 to 5, characterized in that: The fan installation section has a through hole, on which a plug-in device for sealing with the through hole is installed. One end of the plug-in device is located inside the fan installation section and is electrically connected to the fan, and the other end is located outside the fan installation section and is used to be electrically connected to the control device.

7. The air box for heat dissipation according to any one of claims 1 to 5, characterized in that: The end of the air passage extends into the sealed air chamber of the box body, the air outlet is located at the lower part of the sealed air chamber, and the air inlet is located at the upper part of the sealed air chamber.

8. The air box for heat dissipation as claimed in claim 7, characterized in that: The air inlet and the air outlet are respectively located at two diagonally opposite corners of the box body.

9. The air box for heat dissipation according to any one of claims 1 to 5, characterized in that: A heat sink is arranged on the outer wall of the air passage located outside the box.

10. An inflatable cabinet, comprising an air box, on which an electrical mechanism is installed, characterized in that: The air box is an air box for facilitating heat dissipation as described in any one of claims 1 to 9.

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