An electrical cabinet with moisture-proof function

Abstract

The present invention discloses an electric cabinet with a moisture-proof function, which includes a housing provided with a first accommodating cavity; a second accommodating cavity and a third accommodating cavity are provided at the bottom of the housing, an electromagnetic coil is arranged in the second accommodating cavity; a magnetic heat-receiving member is arranged in the third accommodating cavity; the heat-receiving member is fixedly connected with a first deformation member and a second deformation member, the first deformation member and the second deformation member are arranged in a fitting manner, and the heat expansion coefficient of the first deformation member is greater than that of the second deformation member; a first air extraction mechanism is arranged between the first accommodating cavity and the second accommodating cavity; the second accommodating cavity is provided with a second connecting column, a pressure sensor is arranged on the second connecting column, the pressure sensor is correspondingly arranged with the second deformation member, the pressure sensor is electrically connected with a controller, and the controller is electrically connected with the first air extraction mechanism, which has a higher dehumidification efficiency in the housing, realizes automatic control, saves electric energy, and has a simple structure.

Description

Technical Field

[0001] The present invention relates to the field of electrical cabinets, and particularly to an electrical cabinet with a moisture-proof function. Background Art

[0002] An electrical cabinet is a cabinet made of steel materials to protect components from normal operation. The manufacturing materials of electrical cabinets are generally divided into two types: hot-rolled steel plates and cold-rolled steel plates. Cold-rolled steel plates are relatively softer than hot-rolled steel plates and are more suitable for the manufacture of electrical cabinets. Electrical cabinets are widely used, mainly in the chemical industry, environmental protection industry, power system, metallurgical system, industry, nuclear power industry, fire safety monitoring, and transportation industry, etc. The use environment of electrical cabinets is relatively free. If they encounter a relatively humid environment, it is easy to affect the performance of the internal component equipment of the electrical cabinet. In addition, humidity will also reduce the insulation degree of electrical equipment, making it easy for the electrical cabinet to have a leakage phenomenon, and then causing the electrical equipment to malfunction, bringing losses to people.

[0003] In order to achieve the purpose of moisture-proof and drying, existing electrical cabinets usually install an air-conditioning refrigeration and dehumidification device. Although installing an air-conditioning refrigeration and dehumidification device can well control the humidity and temperature inside the electrical cabinet, it has the problems of complex structure and high cost. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide an electrical cabinet with a moisture-proof function and a simple structure.

[0005] The present application provides an electrical cabinet with a moisture-proof function, including,

[0006] A housing provided with a first accommodation cavity;

[0007] A second accommodation cavity and a third accommodation cavity are provided at the bottom of the housing, and an electromagnetic coil is provided in the second accommodation cavity;

[0008] A magnetic heat-receiving member opposite to the electromagnetic coil is provided in the third accommodation cavity;

[0009] A first deformation member and a second deformation member are fixedly connected to the lower end of the heat-receiving member. The first deformation member and the second deformation member are attached to each other, and the thermal expansion coefficient of the first deformation member is greater than that of the second deformation member;

[0010] A first air extraction mechanism for communicating the first accommodation cavity and the second accommodation cavity is provided between the first accommodation cavity and the second accommodation cavity;

[0011] The second accommodating cavity is provided with a second connecting column, the second connecting column is provided with a pressure sensor, the pressure sensor is arranged corresponding to the second deformable member, the pressure sensor is electrically connected to a controller, the controller is electrically connected to a first air extraction mechanism, the second deformable member is heated and bent to abut against the pressure sensor, and the controller controls the speed at which the first air extraction mechanism pumps the air in the second accommodating cavity to the first accommodating cavity according to the change of the pressure signal transmitted by the pressure sensor.

[0012] Further, the axial direction of the heat receiving member is consistent with the axial direction of the electromagnetic coil.

[0013] Further, the bottom wall of the second accommodating cavity is provided with a first connecting column, the upper end of the first connecting column contacts the lower side of the first deformable member, the lower end of the first connecting column is electrically connected to an external power supply, the external power supply is electrically connected to the lower end of the electromagnetic coil, and the end of the first deformable member is electrically connected to the upper end of the electromagnetic coil.

[0014] Further, the pressure sensor is located above the second deformable member.

[0015] Further, the pressure sensor is located between the first deformable member and the second deformable member.

[0016] Further, the bottom wall of the second accommodating cavity is provided with an air inlet.

[0017] Further, the top of the first accommodating cavity is provided with an air outlet, which is provided with a second air extraction mechanism, the side wall of the first accommodating cavity is provided with a humidity sensor, the second air extraction mechanism is electrically connected to the controller, and the controller is electrically connected to the humidity sensor.

[0018] Further, an insulating plate made of an insulating non-metallic material is provided between the second accommodating cavity and the second accommodating cavity, and the electromagnetic coil and the heat receiving member are arranged oppositely on both sides of the insulating plate.

[0019] Further, the external power supply is an alternating power supply.

[0020] Compared with the prior art, the present invention adopts that the expansion coefficient of the first deformable member is greater than that of the second deformable member, and it bends towards the second deformable member when heated. According to the change of the temperature transmitted by the heat receiving member, the change of the pressure of the second deformable member on the pressure sensor, and the controller controls the speed at which the first air extraction mechanism pumps hot air to the first accommodating cavity, so that the dehumidification efficiency in the shell is higher, automatic control is realized, electric energy is saved, and the structure is simple.

[0021] In addition, the present invention adopts the structure of the first deformable member being disengaged from and contacting the first connecting column to realize automatic control of the on-off of the electromagnetic coil, and further controls the upper temperature limit of the heat receiving member. Brief Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0023] Figure 1 is an overall schematic diagram of the electrical cabinet with moisture-proof function of the present invention;

[0024] Figure 2 is a main structural schematic diagram of the electrical cabinet with moisture-proof function of the present invention;

[0025] Figure 3 is a secondary structural schematic diagram of the electrical cabinet with moisture-proof function of the present invention.

[0026] The reference numerals in the drawings include:

[0027] housing 1; partition board 11; first ventilation channel 111; pressure sensor 112;

[0028] first accommodation cavity 2; air outlet 21;

[0029] second accommodation cavity 3; electromagnetic coil 31; second connection column 32; air inlet 33; filter plate 331; second air extraction mechanism 341; first connection column 35;

[0030] third accommodation cavity 4; heating element 41; insulating plate 42;

[0031] first deformation member 5;

[0032] second deformation member 6;

[0033] controller 7;

[0034] first air extraction mechanism 8;

[0035] humidity sensor 9. Detailed Embodiments

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0037] As Figure 1As shown in the figure, the electric cabinet with moisture-proof function of the present invention includes a housing 1 and a door panel (not shown in the figure) rotatably connected to the housing 1. The cross-section of the housing 1 is square, and a first accommodation cavity 2 is provided inside for placing electrical equipment.

[0038] As Figure 1 shown, a second accommodation cavity 3 and a third accommodation cavity 4 are separately provided at the bottom of the housing 1. The cross-sections of the second accommodation cavity 3 and the third accommodation cavity 4 are both square. An electromagnetic coil 31 is fixedly connected inside the second accommodation cavity 3, which generates an alternating magnetic field for raising the temperature of a heating element 41 (to be described below) located in the alternating magnetic field. The axial direction of the electromagnetic coil 31 is consistent with the length direction of the housing 1. Of course, the cross-sectional shapes of the second accommodation cavity 3 and the third accommodation cavity 4 can also be circular, elliptical or other polygons, which are not limited.

[0039] As Figure 1 shown, a heating element 41 is fixedly connected inside the third accommodation cavity 4. It is spiral and made of magnetic metal. The axial direction of the heating element 41 is consistent with the axial direction of the electromagnetic coil 31. According to the eddy current effect, the magnetic field direction of the heating element 41 changes due to the electromagnetic coil 31, and the temperature of the heating element 41 rises, heating the air in the third accommodation cavity 4. Of course, the shape of the heating element 41 can also be long columnar or circular ring-shaped.

[0040] As Figure 2 shown, a first deformation member 5 and a second deformation member 6 are fixedly connected to the lower end of the heating element 41. The first deformation member 5 is in the shape of a long plate and is made of copper-zinc alloy. The second deformation member 6 is in the shape of a long plate and is made of nickel-iron alloy. The first deformation member 5 and the second deformation member 6 are attached to each other. The first deformation member 5 is located below the second deformation member 6. The thermal expansion coefficient of the first deformation member 5 is greater than that of the second deformation member 6. When heated, the expansion speed of the first deformation member 5 is greater than that of the second deformation member 6. The first deformation member 5 drives the second deformation member 6 to bend towards the side of the second deformation member 6, and the second deformation member 6 abuts against a pressure sensor 112 (to be described below).

[0041] As Figure 2 shown, a partition plate 11 is provided between the first accommodation cavity 2 and the second accommodation cavity 3. It is provided with a first ventilation channel 111 for communicating the first accommodation cavity 2 and the second accommodation cavity 3. The first ventilation channel 111 is provided with a first air extraction mechanism 8 for pumping the air in the second accommodation cavity 3 into the first accommodation cavity 2.

[0042] As Figure 2As shown, the side wall of the second accommodation cavity 3 is provided with a second connecting column 32, which is in the shape of a long plate. An end of the second connecting column 32 on the side facing the second deformable member 6 is provided with a pressure sensor 112. The pressure sensor 112 is located above the second deformable member 6. A gap is provided between the pressure sensor 112 and the second deformable member 6. The pressure sensor 112 and the second deformable member 6 are arranged corresponding to each other to sense the pressure change of the second deformable member 6 on the pressure sensor 112. Of course, the pressure sensor 112 and the second deformable member 6 can also be arranged in a fitting manner, which is not limited.

[0043] As Figure 2 shown, the pressure sensor 112 is electrically connected to a controller 7, and the controller 7 is electrically connected to a first air extraction mechanism 8. The controller 7 controls the speed at which the first air extraction mechanism 8 extracts the air in the second accommodation cavity 3 to the first accommodation cavity 2 according to the change of the pressure signal transmitted by the pressure sensor 112. Further, the controller 7 is located outside the housing 1. Of course, the controller 7 can also be arranged inside the housing 1, which is not limited.

[0044] Compared with the prior art, the present invention adopts that the expansion coefficient of the first deformable member 5 is greater than that of the second deformable member 6. When heated, it bends towards the second deformable member 6 side. According to the change of the temperature transmitted by the heat receiving member 41, the pressure change of the second deformable member 6 on the pressure sensor 112, and the controller 7 controls the speed at which the first air extraction mechanism 8 extracts hot air to the first accommodation cavity 2, which has a higher dehumidification efficiency in the housing 1, realizes automatic control, saves electric energy, and has a simple structure.

[0045] In addition, the pressure sensor 112 may not be arranged above the second deformable member 6. The pressure sensor 112 is located between the first deformable member 5 and the second deformable member 6 to sense the magnitude of the extrusion force generated by the thermal expansion between the first deformable member 5 and the second deformable member 6. The pressure sensor 112 transmits the change signal of the extrusion force to the controller 7, and the controller 7 sends a control signal to the first air extraction mechanism 8 to control the speed at which the first air extraction mechanism 8 extracts air into the first accommodation cavity 2.

[0046] As Figure 2As shown, a first connecting column 35 is fixedly connected to the inner bottom wall of the second accommodating cavity 3. It is in the shape of a long column and is made of metal. The upper end of the first connecting column 35 contacts the lower side of one end of the first deformable member 5 away from the heat receiving member 41 for transmitting electric energy. The lower end of the first connecting column 35 is electrically connected to an external power supply (not shown in the figure), the external power supply is electrically connected to the lower end of the electromagnetic coil 31, the end of the first deformable member 5 is electrically connected to the upper end of the electromagnetic coil 31. When the first deformable member 5 is heated and bent, the first connecting column 35 is disengaged from contact with the first deformable member 5, and the electromagnetic coil 31 is powered off, so that the temperature of the heat receiving member 41 no longer rises. As the temperature drops, the first deformable member 5 and the second deformable member 6 recover, the first deformable member 5 contacts the first connecting column 35, the electromagnetic coil 31 resumes power supply, generates an alternating magnetic field, and the temperature of the heat receiving member 41 rises. Of course, the external power supply can also be arranged between the second deformable member 6 and the upper end of the electromagnetic coil 31, which is not limited. It should be noted that the external power supply is an alternating power supply and can alternately supply currents with opposite directions. Further, the external power supply is electrically connected to the controller 7.

[0047] An air inlet 33 is provided on the bottom wall of the second accommodating cavity 3 for communicating the second accommodating cavity 3 with an external air source. Further, a filter plate 331 is provided in the air inlet 33 for filtering moisture in the air entering the second accommodating cavity 3.

[0048] An air outlet 21 is provided at the top of the first accommodating cavity 2, and a second air extraction mechanism 341 is provided thereon for extracting the air in the first accommodating cavity 2 to the external space. A humidity sensor 9 is provided on the side wall of the first accommodating cavity 2 for sensing the humidity in the first accommodating cavity 2. The second air extraction mechanism 341 is electrically connected to the controller 7, the controller 7 is electrically connected to the humidity sensor 9, and the humidity signal is transmitted through the humidity sensor 9. The controller 7 controls the operation and stop of the first air extraction mechanism 8 and the second air extraction mechanism 341.

[0049] An insulating plate 42 is provided between the second accommodating cavity 3 and the second accommodating cavity 3. Its material is made of an insulating non-metallic material, usually insulating ceramic. The electromagnetic coil 31 and the heat receiving member 41 are oppositely arranged on both sides of the insulating plate 42 to ensure that the alternating magnetic field generated by the electromagnetic coil 31 can penetrate the insulating plate 42 and raise the temperature of the heat receiving member 41.

[0050] It should be noted that both the first air extraction mechanism 8 and the second air extraction mechanism 341 are air extractors.

[0051] In this way, when the electrical cabinet of the present invention is in use, the humidity sensor 9 senses that the humidity in the first accommodation cavity 2 rises to a first predetermined value, and it sends a signal to the controller 7. The controller 7 controls the external power supply to energize the electromagnetic coil 31 to generate an alternating magnetic field. The heated part 41 is affected by the change in the magnetic field direction of the electromagnetic coil 31, and the temperature of the heated part 41 rises, heating the air in the third accommodation cavity 4. At the same time, the controller 7 controls the first air extraction mechanism 8 and the second air extraction mechanism 341 to start operating. The first air extraction mechanism 8 extracts the hot air in the second accommodation cavity 3 into the first accommodation cavity 2 to dehumidify and dry the first accommodation cavity 2. The second air extraction mechanism 341 extracts the hot and humid air in the first accommodation cavity 2 outside the housing 1. As the temperature of the heated part 41 rises, the first deformation member 5 and the second deformation member 6 bend. The higher the temperature of the heated part 41, the greater the degree of bending of the first deformation member 5 driving the second deformation member 6 towards the second deformation member 6 side, and the greater the contact pressure between the second deformation member 6 and the pressure sensor. At the same time, the pressure sensor 112 sends different signals to the controller, and the controller 7 controls the air extraction speed of the first air extraction mechanism 8 and the second air extraction mechanism 341 to increase. At the same time, the second deformation member 6 disengages from the first connecting column, the electromagnetic coil 31 is powered off, and the temperature of the heated part 41 no longer rises. As the temperature drops, the first deformation member 5 and the second deformation member 6 recover, the first deformation member 5 contacts the first connecting column 35, the electromagnetic coil 31 is powered on again to generate an alternating magnetic field, and the temperature of the heated part 41 rises, repeating the above steps. When the humidity sensor 9 senses that the humidity in the first accommodation cavity 2 drops to a second predetermined value, it sends a signal to the controller 7. The controller 7 controls the first air extraction mechanism 8 and the second air extraction mechanism 341 to stop operating, and at the same time controls the external power supply to disconnect the power supply to the electromagnetic coil 31, completing the dehumidification and drying operation of the first accommodation cavity 2 of the housing 1.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0053] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An electrical cabinet with a moisture-proof function, characterized in that, including a housing (1) having a first receiving cavity (2); the bottom of the housing (1) is provided with a second receiving cavity (3) and a third receiving cavity (4), and an electromagnetic coil (31) is arranged in the second receiving cavity (3); a magnetic heating element (41) opposite to the electromagnetic coil (31) is arranged in the third receiving cavity (4); a first deformation member (5) and a second deformation member (6) are fixedly connected to the lower end of the heating element (41), the first deformation member (5) and the second deformation member (6) are arranged in a fitting manner, and the thermal expansion coefficient of the first deformation member (5) is greater than that of the second deformation member (6); a first air extraction mechanism (8) for communicating the first receiving cavity (2) and the second receiving cavity (3) is arranged between the first receiving cavity (2) and the second receiving cavity (3); the second receiving cavity (3) is provided with a second connecting column (32), the second connecting column (32) is provided with a pressure sensor (112), the pressure sensor (112) is arranged corresponding to the second deformation member (6), the pressure sensor (112) is electrically connected to a controller (7), the controller (7) is electrically connected to the first air extraction mechanism (8), the second deformation member (6) is bent by heat and abuts against the pressure sensor (112), and the controller (7) controls the speed of the first air extraction mechanism (8) to pump the air in the second receiving cavity (3) into the first receiving cavity (2) according to the change of the pressure signal transmitted by the pressure sensor (112); a first connecting column (35) is arranged on the inner bottom wall of the second receiving cavity (3), the upper end of the first connecting column (35) contacts the lower side of the first deformation member (5), the lower end of the first connecting column (35) is electrically connected to an external power supply, the external power supply is electrically connected to the lower end of the electromagnetic coil (31), and the end of the first deformation member (5) is electrically connected to the upper end of the electromagnetic coil (31).

2. The electric cabinet with moisture-proof function according to claim 1, characterized in that, the axis of the heating element (41) is consistent with the axis of the electromagnetic coil (31).

3. The electrical cabinet with moisture-proof function according to claim 1, characterized in that, the pressure sensor (112) is located above the second deformation member (6).

4. The electric cabinet with moisture-proof function according to claim 1, characterized in that, the pressure sensor (112) is located between the first deformation member (5) and the second deformation member (6).

5. The electric cabinet with moisture-proof function according to claim 1, characterized in that, an air inlet (33) is arranged on the bottom wall of the second receiving cavity (3).

6. The electrical cabinet with moisture-proof function according to claim 1, characterized in that, an air outlet (21) is arranged at the top of the first receiving cavity (2), and a second air extraction mechanism (341) is arranged thereon. A humidity sensor (9) is arranged on the side wall of the first receiving cavity (2). The second air extraction mechanism (341) is electrically connected to the controller (7), and the controller (7) is electrically connected to the humidity sensor (9).

7. The electrical cabinet with moisture-proof function according to claim 1, characterized in that, an insulating plate (42) made of an insulating non-metallic material is arranged between the second receiving cavity (3) and the second receiving cavity (3), and the electromagnetic coil (31) and the heating element (41) are arranged on both sides of the insulating plate (42) in a relative manner.

8. The electric cabinet with moisture-proof function according to claim 1, characterized in that the external power supply is an alternating power supply.

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