A power distribution cabinet and a method of operating a power distribution cabinet

Abstract

The application relates to the electrical appliance technical field, and relates to a power distribution cabinet. The power distribution cabinet comprises a cabinet body, a cabinet cavity in the cabinet body, electrical components installed on an installation plate, a main switch, other electrical components connected to the main switch, a heating component in the cabinet body, a cooling component installed on the cabinet body, a heat preservation component arranged on the side of the cabinet body, a temperature measuring device installed in the cabinet cavity, the temperature measuring device connected to a control device, and the main switch connected to the control device. The control device is used for starting the heating component. The heating component can make the temperature in the cabinet cavity reach the required temperature threshold when the electrical components are started. The application has the advantages of making the internal and external temperatures of the electrical components consistent and prolonging the service life. The application further provides an operation method of the power distribution cabinet.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and more specifically to a power distribution cabinet and a method for operating the power distribution cabinet. Background Technology

[0002] A power distribution cabinet includes a cabinet body, the interior of which is a cabinet cavity. The cabinet body has a door at the front, and a cabinet door is installed at the door. An installation plate is installed inside the cabinet cavity, and electrical components are installed on the installation plate. The electrical components also include a main switch, and other electrical components are connected to the main switch.

[0003] To protect electrical components, existing technologies employ cooling devices installed on the cabinet. These devices maintain a low temperature inside the cabinet, which helps extend the lifespan of the electrical components. However, when the electrical components are first connected to power, their internal temperature often rises rapidly, while the external temperature remains relatively low. This uneven temperature rise, or the internal temperature rising faster than the external temperature, also affects the lifespan of the electrical components. Furthermore, after use, the rapid cooling of the external temperature, while the internal temperature remains relatively high, also leads to uneven or significant temperature differences between the internal and external temperatures, further impacting the lifespan of the electrical components. Current distribution cabinets cannot eliminate these drawbacks, thus also reducing the lifespan of the electrical components. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing a power distribution cabinet and its operation method that makes the temperature changes inside and outside electrical components more uniform, thereby extending their service life.

[0005] The technical solution of the power distribution cabinet of the present invention is implemented as follows: a power distribution cabinet includes a cabinet body, the interior of which is a cabinet cavity, a cabinet door at the front of the cabinet body, a cabinet door installed at the cabinet door, a mounting plate installed inside the cabinet cavity, and electrical components mounted on the mounting plate. The electrical components also include a main switch, and other electrical components are connected to the main switch. Its characteristic is: The cabinet contains a heating element, which is connected to a control device. The control device controls the switching on or off of the heating element to increase the temperature inside the cabinet. A cooling component is also installed on the cabinet. The cooling component is connected to a control device, which controls the opening degree of the cooling component to achieve the effect of lowering the temperature inside the cabinet cavity. An insulation component is provided on the side of the cabinet. The insulation component is connected to a control device, which controls the insulation level of the insulation component to reduce the temperature drop inside the cabinet cavity.

[0006] To elaborate further, the heating component, insulation component, and cooling component mentioned are air conditioning components.

[0007] Furthermore, a temperature measuring device is also installed inside the cabinet cavity, and the temperature measuring device is connected to the control device.

[0008] Furthermore, the insulation component is as follows: the insulation component includes an insulation blanket around the cabinet, with an insulation blanket cavity on the side of the cabinet, and a lifting rope connected to the insulation blanket. The lifting rope is connected to a lifting motor. Activating the lifting motor can unfold or retract the insulation blanket to cover or adjust the degree of coverage on the side of the cabinet, thereby adjusting the insulation level of the insulation component.

[0009] Furthermore, the insulation component is as follows: an insulation board is installed on the side of the cabinet, the insulation board includes a fixed insulation board and a movable insulation board, the side of the cabinet has a sliding groove, the movable insulation board is installed in the sliding groove, the fixed insulation board and the movable insulation board each have through holes, the cabinet has cabinet holes corresponding to the through holes, and the fixed insulation board and the movable insulation board are arranged parallel and close to each other, the movable insulation board is connected to a movable motor, when the movable motor is turned on, the movable insulation board moves, the degree of overlap of the through holes on the fixed insulation board and the movable insulation board can be adjusted, and thus the insulation degree of the insulation component can be adjusted.

[0010] Furthermore, the main switch is also connected to a control device, which controls the opening and closing of the main switch; the control device is as follows: Turn on the control device. First, turn on the heating component. Under the action of the control device, the heating component can make the temperature inside the cabinet cavity reach the temperature threshold required for the surface of the electrical components when they are turned on and running. This process is the cabinet heating process. Then, the control device turns on the main switch to enable other electrical components to operate normally. During this process, the control device turns on the cooling component. Under the action of the control device, the cooling component can make the temperature inside the cabinet reach the normal operating temperature threshold. This process is the normal operating process. Finally, after the main switch stops the operation of other electrical components, the control device activates the insulation component, causing it to operate. Under the control of the control device, the insulation component causes the temperature inside the cabinet cavity to decrease to room temperature over a certain period of time. This process is the cabinet cooling process.

[0011] Furthermore, the temperature rise curve of the cabinet heating process is a sine curve ranging from 0° to 90°; the temperature curve of the cabinet cooling process is a sine curve ranging from 90° to 180°.

[0012] The technical solution of the operation method of the power distribution cabinet of the present invention is as follows: the power distribution cabinet has electrical components, the electrical components include a main switch, other electrical components are connected to the main switch, and the main switch controls the opening or closing of the other electrical components; The cabinet contains heating components, cooling components, and insulation components; Before powering on the electrical components, firstly, turn on the heating components so that the surface temperature of the electrical components reaches the required temperature threshold for operation. This stage is the electrical preheating stage. Once the temperature inside the cabinet reaches a certain level, turn on the main switch. During the normal operation of the electrical components, turn on the cooling components to keep the temperature of the electrical components within the operating temperature threshold range. After the main switch is turned off, the insulation components are activated to allow the electrical components to cool down slowly; this stage is the electrical cooling stage.

[0013] Furthermore, the temperature rise curve of the electrical preheating stage is a sine curve with a range of 0° to 90°.

[0014] Furthermore, the cooling curve of the electrical cooling stage is a 90°–180° sine curve.

[0015] The beneficial effects of this invention are that such a power distribution cabinet and its operation method have the advantage of making the internal and external temperature changes of electrical components tend to be consistent, which is conducive to extending the service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the power distribution cabinet of the present invention.

[0017] Figure 2 This is a schematic diagram of another embodiment of the power distribution cabinet of the present invention.

[0018] Figure 3 yes Figure 2 Enlarged diagram of part A in the image.

[0019] Figure 4 yes Figure 2 Enlarged diagram of part B in the image.

[0020] Figure 5 This is a schematic diagram of a sine curve.

[0021] The components include: 1. Cabinet body; 11. Cabinet cavity; 12. Insulation blanket cavity; 13. Cabinet hole; 2. Mounting plate; 3. Electrical components; 31. Main switch; 4. Heating component; 5. Cooling component; 6. Insulation component; 61. Insulation blanket; 62. Lifting rope; 63. Lifting motor; 64. Insulation board; 641. Fixed insulation board; 642. Movable insulation board; 643. Perforation; 65. Movable motor; 7. Temperature measuring device; 8. Air conditioner; 10. Control device. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] like Figure 1 , 2 As shown in Figures 3, 4, and 5, a power distribution cabinet includes a cabinet body 1, the interior of which is a cabinet cavity 11. The cabinet body has a door at the front, and a cabinet door is installed at the door. An mounting plate 2 is installed inside the cabinet cavity, and electrical components 3 are mounted on the mounting plate. The electrical components also include a main switch 31, and other electrical components are connected to the main switch. Its characteristic is that: The cabinet has a heating element 4, which is connected to a control device 10. The control device controls the switching on or off of the heating element to increase the temperature inside the cabinet. A cooling component 5 is also installed on the cabinet. The cooling component is connected to a control device, which controls the opening degree of the cooling component to achieve the effect of reducing the temperature inside the cabinet cavity. A heat insulation component 6 is provided on the side of the cabinet. The heat insulation component is connected to a control device, which controls the heat insulation degree of the heat insulation component to reduce the temperature drop inside the cabinet cavity.

[0024] The present invention has a heating component, a cooling component, and a heat preservation component inside the cabinet. When heating, cooling, or heat preservation is required, the corresponding component is activated, which is convenient to use.

[0025] The electrical components mentioned above include, for example, current transformers, measuring instruments, and transformers.

[0026] Furthermore, the heating component, cooling component, and insulation component are air conditioner 8; the outdoor unit of the air conditioner is installed on the cabinet, and the indoor unit of the air conditioner is installed inside the cabinet cavity. The indoor unit and the outdoor unit are connected. The air conditioner has a heating mode. When the heating mode is turned on, the air conditioner is the heating component. The air conditioner also has a cooling mode. When the cooling mode is turned on, the air conditioner is the cooling component. When the temperature inside the cabinet rises, the low setting of the cooling mode can be turned on to maintain a stable temperature inside the cabinet. In this case, the air conditioner is the insulation component, which dissipates and removes the heat generated by the electrical components, thus maintaining a certain temperature inside the cabinet cavity.

[0027] Furthermore, a temperature measuring device 7 is also installed inside the cabinet cavity, and the temperature measuring device is connected to the control device. The temperature measuring device is, for example, an electronic thermometer in the prior art; it facilitates temperature monitoring and control.

[0028] In one embodiment, the heating element is an electric heating element.

[0029] In one embodiment, the cooling component is an exhaust fan 51 installed on the side of the cabinet (view omitted). The exhaust fan has multiple speed settings, which can be adjusted as needed to ensure that the heat dissipated by the cabinet is equal to the heat generated by the electrical components, thus maintaining a stable temperature inside the cabinet.

[0030] In one embodiment, such as Figure 1 As shown, the insulation component is as follows: there is an insulation blanket 61 around the cabinet, an insulation blanket cavity 12 on the side of the cabinet, and a lifting rope 62 connected to the insulation blanket. The lifting rope is connected to a lifting motor 63. Activating the lifting motor can unfold or retract the insulation blanket to cover or leave the side of the cabinet uncovered.

[0031] When the insulation is unfolded (e.g.) Figure 1 As shown on the right side of the middle section), this allows for better insulation around the cabinet, thus slowing down the temperature drop inside the cabinet. The degree to which the insulation blanket is unfolded depends on the desired temperature decrease within the cabinet. For example, to achieve a slow temperature drop, the insulation blanket is fully unfolded, covering the entire cabinet; to achieve a rapid temperature drop, the insulation blanket is not unfolded (it is folded, such as...). Figure 1 As shown on the left side of the middle section), there is no insulation blanket around the cabinet; that is, the insulation blanket is unfolded to a certain extent, which can achieve a corresponding cooling degree inside the cabinet cavity; throughout the cooling process, the degree of unfolding of the insulation blanket is adjusted at any time to form a corresponding cooling degree curve inside the cabinet cavity; accordingly, to obtain a certain cooling degree curve inside the cabinet cavity, it can be achieved by adjusting the degree of unfolding of the insulation blanket at any time.

[0032] In another embodiment, such as Figure 2As shown, the insulation component is as follows: an insulation board 64 is installed on the side of the cabinet. The insulation board includes a fixed insulation board 641 and a movable insulation board 642. The side of the cabinet has a sliding groove, and the movable insulation board is installed in the sliding groove. The fixed insulation board and the movable insulation board each have a through hole 643. The cabinet has cabinet holes 13 corresponding to the through holes. The fixed insulation board and the movable insulation board are set parallel and close to each other (preferably side-to-side). The movable insulation board is connected to a movable motor 65. When the movable motor is turned on, the movable insulation board moves, which can adjust the overlap of the through holes on the fixed insulation board and the movable insulation board, thereby adjusting the insulation degree of the insulation component.

[0033] When the perforations do not correspond (e.g.) Figure 2 (As shown on the left side of the middle section), this allows for better insulation around the cabinet, resulting in a slower temperature drop inside the cabinet cavity; to achieve a rapid temperature drop inside the cabinet cavity, perforations should be installed accordingly (such as...). Figure 2 As shown on the right side of the middle section, heat can be conducted through the overlapping of perforations around the cabinet, enabling rapid cooling inside the cabinet cavity. The overlap of the perforations can be adjusted using a moving motor. In other words, a specific cooling effect can be achieved by adjusting the overlap of the perforations. Throughout the cooling process, adjusting the degree of overlap of the perforations continuously creates a corresponding cooling curve within the cabinet cavity. Conversely, to obtain a specific cooling curve within the cabinet cavity, the degree of overlap between the perforations and the cabinet's openings can be adjusted continuously.

[0034] Furthermore, the main switch is also connected to a control device, which controls the opening and closing of the main switch; the control device is as follows: To activate the control device, firstly, the heating element is activated, so that the surface temperature of the electrical components reaches the required temperature threshold for operation. This process is the cabinet heating process. Then, the control device turns on the main switch to enable other electrical components to operate normally. During this process, the control device activates the cooling components. Under the action of the control device, the cooling components can bring the temperature inside the cabinet cavity to within the threshold range for normal operation of the electrical components. This process is the normal operation process. For example, the threshold range for normal operation of the electrical components is 40-50°C. Finally, after the main switch stops the operation of other electrical components, the control device activates the insulation component, causing it to operate. Under the control of the control device, the insulation component causes the temperature inside the cabinet cavity to decrease to room temperature within a certain time. This process is the cabinet cooling process.

[0035] In the prior art, electrical components are not heated before being turned on, and the outside of the electrical components has a low temperature. However, when the electrical components are turned on, the temperature often rises from the inside of the electrical components, resulting in a large temperature difference between the inside and outside of the electrical components, which makes the electrical components easy to be damaged. The present invention adopts the above-mentioned cabinet heating process, that is, at the beginning, the cabinet is heated first, so that the outside of the electrical components has a certain temperature. During the use of electrical components, since the heating often starts from the inside of the electrical components, this achieves the inside and outside of the electrical components to heat up synchronously, which is beneficial to the protection of the electrical components. In existing technologies, when electrical components are turned off, they are also cooled down rapidly, which is not conducive to the protection of the electrical components.

[0036] The present invention adopts the above-mentioned cabinet cooling process. Due to the function of the heat preservation component, the electrical part will be cooled down slowly, which is beneficial to its protection.

[0037] In one embodiment, the control device may be a PLC control device.

[0038] This has the advantage of a higher degree of automation.

[0039] Furthermore, the temperature rise curve of the cabinet heating process is a sine curve with a range of 0° to 90°, and the temperature curve of the cabinet cooling process is a sine curve with a range of 90° to 180°.

[0040] The reason for adopting a sine curve (0°–90°) for the cabinet's heating process is that... Figure 5 The reason for segment ab in the diagram is that when heating the cabinet, initially, the cabinet can be heated to a relatively high temperature per unit time. After a certain period of heating, the temperature reaches a relatively high temperature (close to the point where the electrical components start to work). When the required temperature threshold for the outside of the electrical components is reached, for example, 30-35°C, the temperature can be increased slowly to make the temperature inside and outside of the electrical components the same, which is beneficial to protecting the electrical components. This heating process is the same as the pattern of a sine curve from 0° to 90°.

[0041] The reason for adopting a temperature curve that resembles a sine curve (90°–180°) during the cabinet cooling process is that… Figure 5The reason for segment bc in the text is that when cooling the cabinet, initially the electrical components are at a higher temperature. Rapid cooling would be detrimental to the insulation of these components, potentially causing them to crack or be damaged. Therefore, cooling must be gradual, requiring the activation of insulation components. This means the temperature drop within the cabinet is relatively small per unit time. Once the temperature inside the cabinet has decreased to a certain level, the electrical components are in a safe state, allowing for faster cooling. This cooling process mirrors the 90°–180° curve of a sine wave.

[0042] The technical solution of the operation method of the power distribution cabinet of the present invention is as follows: the power distribution cabinet has electrical components, the electrical components include a main switch, other electrical components are connected to the main switch, and the main switch controls the opening or closing of the other electrical components; The cabinet contains heating components, cooling components, and insulation components; Before powering on the electrical components, firstly, turn on the heating components so that the surface temperature of the electrical components reaches the required temperature threshold for operation. This stage is the electrical preheating stage. Once the temperature inside the cabinet reaches a certain level, turn on the main switch. During the normal operation of the electrical components, turn on the cooling components to keep the temperature of the electrical components within the operating temperature threshold range. After the main switch is turned off, the insulation components are activated to allow the electrical components to cool down slowly; this stage is the electrical cooling stage.

[0043] Furthermore, the temperature rise curve of the electrical preheating stage is a sine curve with a range of 0° to 90°.

[0044] Furthermore, the cooling curve of the electrical cooling stage is a 90°–180° sine curve.

[0045] It should be noted that the embodiments and beneficial effects of the power distribution cabinet and its operation method of the present invention can be mutually corroborated and supplemented.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A power distribution cabinet, comprising a cabinet body, the interior of which is a cabinet cavity, a cabinet door at the front of the cabinet body, a cabinet door installed at the cabinet door, a mounting plate installed inside the cabinet cavity, and electrical components mounted on the mounting plate, the electrical components further comprising a main switch, and other electrical components connected to the main switch, characterized in that: The cabinet contains a heating element, which is connected to a control device. The control device controls the switching on or off of the heating element to increase the temperature inside the cabinet. A cooling component is also installed on the cabinet. The cooling component is connected to a control device, which controls the opening degree of the cooling component to achieve the effect of reducing the temperature inside the cabinet. An insulation component is provided on the side of the cabinet. The insulation component is connected to a control device, which controls the insulation level of the insulation component to reduce the temperature drop inside the cabinet cavity.

2. The power distribution cabinet according to claim 1, characterized in that: The heating component, insulation component, and cooling component mentioned are air conditioning components.

3. The power distribution cabinet according to claim 1, characterized in that: A temperature measuring device is also installed inside the cabinet cavity, and the temperature measuring device is connected to the control device.

4. The power distribution cabinet according to claim 2, characterized in that: The insulation component is as follows: it includes an insulation blanket around the cabinet, an insulation blanket cavity on the side of the cabinet, and a lifting rope connected to the insulation blanket. The lifting rope is connected to a lifting motor. Activating the lifting motor can unfold or retract the insulation blanket to cover the side of the cabinet or adjust the degree of coverage, thereby adjusting the insulation level of the insulation component.

5. The power distribution cabinet according to claim 4, characterized in that: The main switch is also connected to a control device, which controls the opening and closing of the main switch; the control device is as follows: Turn on the control device. First, turn on the heating component. Under the action of the control device, the heating component can make the temperature inside the cabinet cavity reach the temperature threshold required for the surface of the electrical components when they are turned on and running. This process is the cabinet heating process. Then, the control device turns on the main switch to enable other electrical equipment to operate normally. During this process, the control device activates the cooling components. Under the action of the control device, the cooling components can make the temperature inside the cabinet reach the normal operating temperature threshold. This process is the normal operating process. Finally, after the main switch stops other electrical equipment from operating, the control device activates the insulation component, causing it to run. Under the control of the control device, the insulation component causes the temperature inside the cabinet cavity to decrease to room temperature over a certain period of time. This process is the cabinet cooling process.

6. The operation method of the power distribution cabinet, wherein the power distribution cabinet has electrical components, the electrical components further include a main switch, other electrical components are connected to the main switch, and the main switch controls the opening or closing of other electrical components; The cabinet contains heating components, cooling components, and insulation components; Before powering on the electrical components, firstly, turn on the heating components so that the surface temperature of the electrical components reaches the required temperature threshold for operation. This stage is the electrical preheating stage. Once the temperature inside the cabinet reaches a certain level, turn on the main switch. During the normal operation of the electrical components, turn on the cooling components to keep the temperature of the electrical components within the operating temperature threshold range. After the main switch is turned off, the insulation components are activated to allow the electrical components to cool down slowly; this stage is the electrical cooling stage.

7. The operation method of the distribution cabinet according to claim 6, characterized in that: The temperature rise curve of the electrical preheating stage is a sine curve with a range of 0° to 90°.

8. The operation method of the distribution cabinet according to claim 7, characterized in that: The cooling curve of the electrical cooling stage is a 90°–180° sine curve.

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