Electric heating device for power distribution cabinet and power distribution cabinet

Abstract

The present invention discloses an electric heating device for a power distribution cabinet, comprising an external shell and a wireless temperature and humidity sensor, a partition is fixedly connected to one side of the external shell, a bellows is fixedly connected to the surface of the partition and one side close to the external shell, a motor is fixedly connected to one side of the bellows, the output shaft end of the motor extends into the bellows and is fixedly connected to a fan blade, an air outlet pipe is connected to the bottom of the bellows, an electric heater is fixedly connected to the side of the bellows and close to the air outlet pipe, the surface of the air outlet pipe is connected to an air supply pipe, one end of the air supply pipe extends to the other side of the partition, a dehumidification box is also fixedly connected to the inner wall of the external shell, and a dehumidification pipe connected to one end of the dehumidification box is arranged on the surface of the air outlet pipe. The present invention relates to the technical field of electric power control cabinets. The electric heating device for a power distribution cabinet and the power distribution cabinet solve the problems of slow temperature diffusion and low dehumidification efficiency when the existing power distribution cabinet is heated, and at the same time facilitate the upgrading and transformation of the existing power distribution cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power control cabinets, and in particular to an electric heating device for a power distribution cabinet and a power distribution cabinet. Background Art

[0002] As an important part of the power system, the distribution cabinet is responsible for distributing and controlling electric energy. The normal operation of its internal equipment is crucial to the stability of the entire power system. However, the distribution cabinet often faces a variety of environmental problems during operation, such as moisture, condensation, overheating, etc. These problems not only affect the performance of the equipment, but may also cause safety hazards such as short circuits and fires.

[0003] At present, the environmental control methods for power distribution cabinets on the market are relatively simple, usually only using simple dehumidifiers or vents for dehumidification and heat dissipation, or directly fixing the heater on the inner wall of the cabinet. These methods can alleviate the problem to a certain extent, but they have defects such as limited effect, inability to automatically adjust, slow temperature diffusion during heating, and high local temperature. Even if there are smarter power distribution cabinets, due to the large stock of existing power distribution cabinets, upgrading and transformation is also a large expense, which is not convenient for rapid promotion. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an electric heating device for a distribution cabinet and a distribution cabinet, which solves the problems of slow temperature diffusion and low dehumidification efficiency during heating of the existing distribution cabinet, and facilitates the upgrading and transformation of the existing distribution cabinet.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electric heating device for a power distribution cabinet, comprising an external shell and a wireless temperature and humidity sensor, a partition is fixedly connected to one side of the external shell, a bellows is fixedly connected to the surface of the partition and a side close to the external shell, a motor is fixedly connected to one side of the bellows, an output shaft end of the motor extends into the bellows and is fixedly connected to a fan blade, an air outlet pipe is connected to the bottom of the bellows, an electric heater is fixedly connected to the side of the bellows and close to the air outlet pipe, an air supply pipe is connected to the surface of the air outlet pipe, one end of the air supply pipe extends to the other side of the partition, a dehumidification box is also fixedly connected to the inner wall of the external shell, a dehumidification pipe connected to one end of the dehumidification box is provided on the surface of the air outlet pipe, a dehumidification pipe connected to one end of the dehumidification box is provided, a plurality of dehumidification boxes are provided, connecting pipes are connected between adjacent dehumidification boxes, and one end of the terminal dehumidification box is connected to a circulation pipe;

[0008] The dehumidification box comprises a box body, both ends of the box body are provided with pipe seats, a heat insulation box is provided in the box body, an electric heating wire is provided in the heat insulation box, the surface of the electric heating wire is wound with highly absorbent fiber, a sealing cover is provided on the top of the box body, a sealing plate is fixedly connected to the top of the box body and located in the sealing cover, guide rods are vertically slidably connected to the sealing cover on both sides of the top of the box body, the bottom end of the guide rod extends into the box body and is fixedly connected to a fixing frame, the top of the guide rod is fixedly connected to a limiting block, a spring is provided between the bottom of the limiting block and the top of the box body, a temperature sensing trigger for driving the fixing frame to move is provided between the top of the inner wall of the box body and the top of the fixing frame, a sealing plug is fixedly connected to the top of the fixing frame, and air holes are provided on the surface of the sealing plate and at the position corresponding to the sealing plug;

[0009] The top of the dehumidification box is connected to a dehumidification pipe, one end of which extends to the outside of the external shell. A controller is arranged on one side of the internal part of the external shell, and the wireless temperature and humidity sensor is communicatively connected with the controller.

[0010] Preferably, the temperature-sensing trigger comprises an outer tube and an inner tube, the inner tube is slidably connected to the inner wall of the outer tube, a telescopic bag is provided between one end of the inner tube located inside the outer tube and the outer tube, the interior of the telescopic bag is in a sealed state, the telescopic bag is filled with alcohol or mercury, and the telescopic direction of the telescopic bag is the axial direction of the inner tube.

[0011] Preferably, an air inlet pipe is provided on the surface of the partition and at a position corresponding to the wind box.

[0012] Preferably, a first solenoid valve is provided on the surface of the air supply pipe, a second solenoid valve is provided on the surface of the dehumidification pipe, the surface of the circulation pipe is also connected to the air inlet pipe, a third solenoid valve is provided on the surface of the circulation pipe close to the dehumidification box, and a fourth solenoid valve is provided on the surface of the air inlet pipe.

[0013] Preferably, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are normally closed solenoid valves.

[0014] Preferably, an exhaust hood is provided on one side of the external shell and at a position corresponding to the dehumidification pipe, a protective box is provided on the top of the exhaust hood, a fan is provided in the protective box, the protective box is connected to the inside of the exhaust hood, the bottom of the exhaust hood is open, and an air inlet is provided on the surface of the protective box.

[0015] Preferably, a control panel electrically connected to the controller is provided on the surface of the external housing.

[0016] A power distribution cabinet comprises the above-mentioned electric heating device.

[0017] Preferably, the external shell is fixed on both sides of the power distribution cabinet, and the wireless temperature and humidity sensor is arranged inside the power distribution cabinet.

[0018] (III) Beneficial effects

[0019] The present invention provides an electric heating device for a power distribution cabinet and a power distribution cabinet. The invention has the following beneficial effects:

[0020] (1) This electric heating device for a power distribution cabinet has a highly integrated design, with a bellows, an electric heater and a dehumidifier box arranged inside the outer shell, integrating the heating, dehumidification and heat dissipation functions into one device, thereby achieving comprehensive control over the internal environment of the power distribution cabinet. This not only improves the efficiency of the device, but also reduces the occupied space, making it easier to modify and install existing power distribution cabinets. By setting up wireless temperature and humidity sensors and controllers, the heating, dehumidification and heat dissipation functions can be automatically adjusted according to the environment inside the power distribution cabinet, ensuring that the internal environment of the power distribution cabinet is always maintained in the best state. By setting up highly absorbent fibers and electric heating wires in the dehumidifier box, the highly absorbent fibers can be recycled to ensure the dehumidification effect.

[0021] (2) By installing electric heating devices on both sides of the distribution cabinet, the environment inside the distribution cabinet can be automatically adjusted, reducing the cost of upgrading and transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 The three-dimensional structure of the external housing of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 3 The three-dimensional structure of the external housing of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 4 It is a schematic diagram of the internal structure of the external housing of the present invention;

[0026] Figure 5 This is a schematic diagram of the distribution of the dehumidification box of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the dehumidification box of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the fixing frame and the sealing plate of the present invention;

[0030] Fig. 9This is a schematic diagram of the structure of the temperature sensing trigger of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the power distribution cabinet of the present invention.

[0032] In the figure: 1-external housing, 2-wireless temperature and humidity sensor, 3-partition, 4-bellows, 5-motor, 6-fan blades, 7-inlet pipe, 8-outlet pipe, 9-electric heater, 10-air supply pipe, 11-first solenoid valve, 12-dehumidification box, 121-box, 122-tube seat, 123-insulation box, 124-electric heating wire, 125-high water-absorbent fiber, 126-sealing cover, 127-sealing plate, 128-guide rod, 12 9-fixed frame, 1210-limiting block, 1211-spring, 1212-temperature trigger, 1213-sealing plug, 1214-ventilation hole, 13-dehumidification pipe, 14-connecting pipe, 15-circulation pipe, 16-dehumidification pipe, 17-controller, 18-second solenoid valve, 19-third solenoid valve, 20-exhaust hood, 21-protection box, 22-fan, 23-control panel, 24-air inlet pipe, 25-fourth solenoid valve. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-10 The present invention provides a technical solution: an electric heating device for a power distribution cabinet, comprising an external shell 1 and a wireless temperature and humidity sensor 2, a plurality of wireless temperature and humidity sensors 2 can be provided, and the wireless temperature and humidity sensors 2 can be placed at different heights in the power distribution cabinet, a partition 3 is fixedly connected to one side of the external shell 1, a bellows 4 is fixedly connected to the surface of the partition 3 and close to the side of the external shell 1, a motor 5 is fixedly connected to one side of the bellows 4, an output shaft end of the motor 5 extends into the bellows 4 and is fixedly connected to a fan blade 6, a fan blade 6 is fixedly connected to the surface of the partition 3 and located at a position corresponding to the bellows 4 The bottom of the bellows 4 is connected to an air inlet pipe 7, and an air outlet pipe 8 is connected to the bellows 4. An electric heater 9 is fixedly connected to one side of the bellows 4 and close to the air outlet pipe 8. The surface of the air outlet pipe 8 is connected to an air supply pipe 10. One end of the air supply pipe 10 extends to the other side of the partition 3. The fan blades 6 are driven by the motor 5 to rotate. The air enters the bellows 4 from the air inlet pipe 7 and is discharged from the air supply pipe 10 through the heating of the electric heater 9, thereby heating the air in the distribution cabinet and avoiding condensation on the surface of the electrical equipment. A plurality of air supply pipes 10 can be provided to facilitate uniform distribution of hot air in the distribution cabinet.

[0035] The inner wall of the external housing 1 is also fixedly connected with a dehumidification box 12, and the surface of the air outlet pipe 8 is provided with a dehumidification pipe 13 connected with one end of the dehumidification box 12. There are multiple dehumidification boxes 12, and connecting pipes 14 are connected between adjacent dehumidification boxes 12. One end of the terminal dehumidification box 12 is connected with a circulation pipe 15;

[0036] The dehumidification box 12 includes a box body 121, both ends of the box body 121 are provided with a pipe seat 122, a heat insulation box 123 is provided in the box body 121, and an electric heating wire 124 is provided in the heat insulation box 123. The surface of the electric heating wire 124 is wound with a super absorbent fiber 125. The super absorbent fiber is obtained by spinning after modification of polyacrylic acid, called PSA, with a fiber diameter of 30μm. It can absorb 70-100 times its own weight of water within 15 seconds and has flame retardant properties. When air passes through the surface of the super absorbent fiber 125, it can absorb moisture in the air, thereby reducing the humidity of the air; and the electric heating wire 125 is provided 124 can heat the highly absorbent fiber to evaporate its moisture. A sealing cover 126 is provided on the top of the box body 121. A sealing plate 127 is fixedly connected to the top of the box body 121 and located in the sealing cover 126. Guide rods 128 are vertically slidably connected to the sealing cover on both sides of the top of the box body 121. The bottom end of the guide rod 128 extends into the box body 121 and is fixedly connected to a fixing frame 129. The top of the guide rod 128 is fixedly connected to a limiting block 1210. A spring 1211 is provided between the bottom of the limiting block 1210 and the top of the box body 121. The top of the inner wall of the box body 121 is connected to the fixing frame 129. A temperature trigger 1212 is arranged between the top of the fixing frame 129, wherein the temperature trigger 1212 comprises an outer tube 12121 and an inner tube 12122, the inner tube 12122 is slidably connected to the inner wall of the outer tube 12121, a telescopic bag sleeve 12123 is arranged between one end of the inner tube 12122 located inside the outer tube 12121 and the outer tube 12121, the interior of the telescopic bag sleeve 12123 is in a sealed state, the telescopic bag sleeve 12123 is filled with alcohol or mercury, the telescopic direction of the telescopic bag sleeve 12123 is the axial direction of the inner tube, and the top of the fixing frame 129 is fixedly connected with a sealing Plug 1213, an air vent 1214 is provided on the surface of the sealing plate 127 and at a position corresponding to the sealing plug 1213. The top of the dehumidification box 12 is connected to a dehumidification pipe 16, one end of the dehumidification pipe 16 extends to the outside of the external shell 1. Due to the heating of the electric heating wire 124, the temperature inside the box 121 increases, and the volume of the alcohol or mercury in the temperature sensing trigger 1212 increases after being heated, which drives the volume of the telescopic bag to increase, thereby driving the fixing frame 129 to move downward, the spring 1211 is compressed, and the sealing plug 1213 is separated from the sealing plate 127, so that the air vent 1214 is exposed, thereby discharging water vapor.

[0037] A controller 17 is provided on one side of the inner part of the external shell 1, and the wireless temperature and humidity sensor 2 is communicatively connected with the controller 17. The temperature and humidity inside the power distribution cabinet are detected by the wireless temperature and humidity sensor 2. When the preset value is reached, heating, dehumidification or heat dissipation is realized.

[0038] A first solenoid valve 11 is provided on the surface of the air supply pipe 10, a second solenoid valve 18 is provided on the surface of the dehumidification pipe 13, the surface of the circulation pipe 15 is also connected to the air inlet pipe 24, a third solenoid valve 19 is provided on the surface of the circulation pipe 15 and close to the dehumidification box 12, and a fourth solenoid valve 25 is provided on the surface of the air inlet pipe 24.

[0039] The first solenoid valve 11 , the second solenoid valve 18 , the third solenoid valve 19 and the fourth solenoid valve 25 are normally closed solenoid valves.

[0040] In the heating mode, the first solenoid valve 11 is opened, the motor 5 and the electric heater 9 start to work, the air enters the wind box 4 from the air intake pipe 7, and the air is heated by the electric heater 9 and discharged from the air supply pipe 10;

[0041] In dehumidification mode, the second solenoid valve 18 and the third solenoid valve 19 are opened, the motor 5 is started, and the air enters the bellows 4 from the air inlet pipe 7, enters the dehumidification box 12 through the dehumidification pipe 13, and is discharged from the circulation pipe 15; after the dehumidification box 12 has been working for a period of time, the electric heating wire 124 heats the highly absorbent fiber to evaporate its moisture, and the water vapor is discharged from the dehumidification pipe 16;

[0042] In the heat dissipation mode, the second solenoid valve 18 and the fourth solenoid valve 25 are opened. Since the temperature rises when heat dissipation is needed, the temperature sensor trigger 1212 drives the fixed frame 129 to move downward, and the sealing plug 1213 is separated from the sealing plate 127. At this time, the air enters the bellows 4 from the air inlet pipe 7, enters the dehumidification box 12 through the dehumidification pipe 13, and is discharged from the dehumidification pipe 16. The outside air enters the distribution cabinet from the air inlet pipe 24.

[0043] An exhaust hood 20 is provided on one side of the external shell 1 and at a position corresponding to the dehumidification pipe 16. A protective box 21 is provided on the top of the exhaust hood 20. A fan 22 is provided in the protective box 21. The protective box 21 is connected to the inside of the exhaust hood 20. The bottom of the exhaust hood 20 is open. An air inlet is provided on the surface of the protective box 21. The fan 22 accelerates the flow of air at the end of the dehumidification pipe 16, thereby facilitating the discharge of air in the dehumidification box 12.

[0044] A control panel 23 electrically connected to the controller 17 is disposed on the surface of the external housing 1 .

[0045] A power distribution cabinet comprises the above-mentioned electric heating device.

[0046] The external housing 1 is fixed on both sides of the power distribution cabinet, and the wireless temperature and humidity sensor 2 is arranged inside the power distribution cabinet.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric heating device for a power distribution cabinet, comprising an external housing (1) and a wireless temperature and humidity sensor (2), characterized in that: A partition (3) is fixedly connected to one side of the external shell (1); a wind box (4) is fixedly connected to the surface of the partition (3) and on a side close to the external shell (1); a motor (5) is fixedly connected to one side of the wind box (4); an output shaft end of the motor (5) extends into the wind box (4) and is fixedly connected to a fan blade (6); an air outlet pipe (8) is connected to the bottom of the wind box (4); an electric heater (9) is fixedly connected to the inside of the wind box (4) and on a side close to the air outlet pipe (8); and the air outlet The surface of the tube (8) is connected to an air supply pipe (10), one end of the air supply pipe (10) extends to the other side of the partition (3), the inner wall of the external shell (1) is also fixedly connected to a dehumidification box (12), the surface of the air outlet pipe (8) is provided with a dehumidification pipe (13) connected to one end of the dehumidification box (12), a plurality of dehumidification boxes (12) are provided, adjacent dehumidification boxes (12) are connected to each other by a connecting pipe (14), and one end of the terminal dehumidification box (12) is connected to a circulation pipe (15); The dehumidification box (12) comprises a box body (121), both ends of the box body (121) are provided with pipe seats (122), a heat insulation box (123) is provided inside the box body (121), an electric heating wire (124) is provided inside the heat insulation box (123), a surface of the electric heating wire (124) is wound with highly absorbent fibers (125), a sealing cover (126) is provided on the top of the box body (121), a sealing plate (127) is fixedly connected to the top of the box body (121) and located inside the sealing cover (126), guide rods (128) are vertically slidably connected to the two sides of the top of the box body (121) and located inside the sealing cover, and the guide rods (128) are ) extends into the box body (121) and is fixedly connected to a fixing frame (129); the top end of the guide rod (128) is fixedly connected to a limit block (1210); a spring (1211) is provided between the bottom of the limit block (1210) and the top of the box body (121); a temperature trigger (1212) for driving the fixing frame (129) to move is provided between the top of the inner wall of the box body (121) and the top of the fixing frame (129); a sealing plug (1213) is fixedly connected to the top of the fixing frame (129); and a vent hole (1214) is provided on the surface of the sealing plate (127) and at a position directly corresponding to the sealing plug (1213); The top of the dehumidification box (12) is connected to a dehumidification pipe (16), one end of which extends to the outside of the external housing (1), a controller (17) is provided on one side inside the external housing (1), and the wireless temperature and humidity sensor (2) is communicatively connected to the controller (17); The temperature-sensing trigger (1212) comprises an outer tube (12121) and an inner tube (12122); the inner tube (12122) is slidably connected to the inner wall of the outer tube (12121); a telescopic bag sleeve (12123) is arranged between one end of the inner tube (12122) located inside the outer tube (12121) and the outer tube (12121); the interior of the telescopic bag sleeve (12123) is in a sealed state; the telescopic bag sleeve (12123) is filled with alcohol or mercury; and the telescopic direction of the telescopic bag sleeve (12123) is the axial direction of the inner tube.

2. The electric heating device for a power distribution cabinet according to claim 1, characterized in that: An air intake pipe (7) is provided on the surface of the partition plate (3) and at a position directly corresponding to the wind box (4).

3. The electric heating device for a power distribution cabinet according to claim 1, characterized in that: A first solenoid valve (11) is arranged on the surface of the air supply pipe (10), a second solenoid valve (18) is arranged on the surface of the dehumidification pipe (13), the surface of the circulation pipe (15) is also connected to an air inlet pipe (24), a third solenoid valve (19) is arranged on the surface of the circulation pipe (15) and close to the dehumidification box (12), and a fourth solenoid valve (25) is arranged on the surface of the air inlet pipe (24).

4. The electric heating device for a power distribution cabinet according to claim 3, characterized in that: The first solenoid valve (11), the second solenoid valve (18), the third solenoid valve (19) and the fourth solenoid valve (25) are normally closed solenoid valves.

5. The electric heating device for a power distribution cabinet according to claim 1, characterized in that: An exhaust hood (20) is provided on one side of the external housing (1) and at a position directly corresponding to the dehumidification pipe (16); a protective box (21) is provided on the top of the exhaust hood (20); a fan (22) is provided in the protective box (21); the protective box (21) is communicated with the interior of the exhaust hood (20); the bottom of the exhaust hood (20) is open; and an air inlet is provided on the surface of the protective box (21).

6. The electric heating device for a power distribution cabinet according to claim 1, characterized in that: A control panel (23) electrically connected to the controller (17) is provided on the surface of the external housing (1).

7. A power distribution cabinet, characterized in that: The electric heating device comprises the electric heating device according to any one of claims 1 to 6.

8. A power distribution cabinet according to claim 7, characterized in that: The external housing (1) is fixed on both sides of the power distribution cabinet, and the wireless temperature and humidity sensor (2) is arranged inside the power distribution cabinet.

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