Box-type electrical equipment with abnormal protection function

Abstract

This utility model relates to the field of electrical equipment technology, and in particular to a box-type electrical equipment with abnormal protection function. The equipment includes a box assembly, an environmental control device, and an auxiliary protection device. The box assembly contains N component boxes. The environmental control device and the auxiliary protection device are both installed inside the box assembly. The auxiliary protection device includes a monitoring component and a control component; wherein N≥1. Thus, the monitoring component monitors the environmental parameters inside the box assembly and uploads these environmental parameters to the control component. The control component compares the environmental parameters with preset thresholds to confirm the working status of the environmental control device. When the environmental control device is in an abnormal working state, the control component cuts off the power supply circuit of the environmental control device, thereby realizing timely disconnection of the power supply circuit of the environmental control device when a fault occurs, preventing the environmental control device from burning out.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a box-type electrical equipment with abnormal protection function. Background Technology

[0002] Box-type electrical equipment is a modular outdoor power equipment that integrates various electrical components and is widely used in power distribution, power conversion, and equipment protection. As a critical node in the power system, the stability of box-type electrical equipment directly affects the reliability of power supply; and whether box-type electrical equipment can operate normally depends mainly on whether its internal operating environment is normal.

[0003] The internal operating environment of box-type electrical equipment is mainly regulated by environmental control devices such as cooling fans and heating modules installed inside the equipment to ensure its normal operation. As the box-type electrical equipment ages, the performance of these environmental control devices deteriorates, making them prone to various malfunctions and causing the equipment to malfunction.

[0004] To ensure the normal operation of box-type electrical equipment, maintenance personnel need to conduct frequent inspections of the environmental control devices. However, this approach has the following drawbacks: 1. Maintenance personnel cannot monitor the box-type electrical equipment around the clock, and the environmental control devices may malfunction during the intervals between inspections; 2. Maintenance personnel rely mainly on experience to judge the operating status of the environmental control devices, making it difficult to accurately detect early signs of abnormalities. These drawbacks can easily lead to malfunctions in the environmental control devices when unattended, such as stalled cooling fans and localized overheating of heating modules. These malfunctions can not only burn out the environmental control devices but may also cause electrical fires due to overcurrent. Utility Model Content

[0005] In view of this, it is necessary to provide a box-type electrical equipment with abnormal protection function, which can monitor the working status of the environmental control device in real time, so as to cut off the power supply in time when the environmental control device fails, and prevent the environmental control device from burning out.

[0006] This utility model provides a box-type electrical device with abnormal protection function, including a box assembly, an environmental control device, and an auxiliary protection device. The box assembly contains N component boxes for installing electrical components. The environmental control device is installed inside the box assembly and is used to regulate the operating environment of each component box within the box assembly. The auxiliary protection device is installed inside the box assembly and includes a monitoring component and a control component. The monitoring component is electrically connected to the control component and is installed inside the box assembly to monitor environmental parameters within the box assembly and upload these parameters to the control component. The control component is electrically connected to the power supply circuit of the environmental control device and is used to compare the environmental parameters with preset thresholds to determine the operating state of the environmental control device, and to cut off the power supply circuit of the environmental control device when it is in an abnormal operating state; wherein, N≥1.

[0007] Preferably, the auxiliary protection device further includes an alarm component, which includes an audible and visual alarm element and a signal transmitter. Both the audible and visual alarm element and the signal transmitter are electrically connected to the control component. The audible and visual alarm element is installed outside the enclosure and is used to emit an audible and visual alarm signal when the control component cuts off the power supply circuit of the environmental control device. The signal transmitter is installed inside the enclosure and is used to send an alarm signal to the monitoring backend when the control component cuts off the power supply circuit of the environmental control device.

[0008] Preferably, the enclosure device further includes an electrical box body and N ventilation ducts. The electrical box body has N ventilation openings, and each ventilation opening is connected to a component box to connect each component box to the outside. One end of each ventilation duct is connected to the top surface of a component box, and the other end passes through the electrical box body to connect to the outside.

[0009] Preferably, the environmental control device includes N cooling fans and N heating and dehumidifying components. Each component box is equipped with a cooling fan and a heating and dehumidifying component. The cooling fans are installed on the top of the component box and are located in the ventilation duct. They are used to blow the air inside the component box so that the air enters the component box from the vent and exits the component box along the ventilation duct to remove the heat inside the component box. The heating and dehumidifying components are installed at the bottom of the component box and are used to dry the component box by heating.

[0010] Preferably, the monitoring component includes N flow rate sensors, N heat dissipation temperature sensors, N ambient temperature sensors, and N heating and dehumidification temperature sensors. Each ventilation duct has a corresponding flow rate sensor installed to monitor the air flow rate within the ventilation duct. Each cooling fan has a heat dissipation temperature sensor installed to monitor the temperature of the cooling fan. Each component box has an ambient temperature sensor installed to monitor the temperature inside the component box. Each heating and dehumidification component has a heating and dehumidification temperature sensor installed to monitor the temperature of the heating and dehumidification component.

[0011] Preferably, the control component includes N flow rate relays and N temperature relays. Each flow rate relay is electrically connected to a cooling fan, and also electrically connected to a cooling temperature sensor corresponding to the cooling fan and a flow rate sensor in the corresponding ventilation duct. This allows the power circuit of the cooling fan to be disconnected when the temperature detected by the cooling temperature sensor is higher than a preset threshold and the flow rate detected by the flow rate sensor is lower than a preset threshold; otherwise, it does not operate. Each temperature relay is electrically connected to a heating and dehumidifying component, and also electrically connected to a heating and dehumidifying temperature sensor corresponding to the heating and dehumidifying component and an ambient temperature sensor in the corresponding component box. This allows the power circuit of the heating and dehumidifying component to be disconnected when both the temperature detected by the heating and dehumidifying temperature sensor and the ambient temperature sensor are higher than a preset threshold; otherwise, it does not operate.

[0012] Preferably, the control component further includes N flow rate contactors and N temperature contactors. Each flow rate contactor is electrically connected to a flow rate relay and the power circuit of the corresponding cooling fan, for connecting or disconnecting the power circuit of the cooling fan; each temperature contactor is electrically connected to a temperature relay and the power circuit of the corresponding heating and dehumidifying component, for connecting or disconnecting the power circuit of the heating and dehumidifying component.

[0013] Preferably, each flow rate relay and each temperature relay is a silicon carbide solid-state relay; each flow rate contactor and each temperature contactor is a silicon carbide solid-state contactor.

[0014] The aforementioned box-type electrical equipment with abnormal protection function includes a enclosure, an environmental control device, and an auxiliary protection device. The enclosure contains N component boxes for housing electrical components. The environmental control device, installed within the enclosure, regulates the operating environment of each component box. The auxiliary protection device, also installed within the enclosure, includes a monitoring component and a control component. The monitoring component is electrically connected to the control component and monitors environmental parameters within the enclosure, uploading these parameters to the control component. The control component is electrically connected to the power supply circuit of the environmental control device, comparing the environmental parameters with preset thresholds to determine the operating status of the environmental control device and then controlling the operation of the device. When the device is in an abnormal operating state, the power supply circuit of the environmental control device is cut off; where N≥1; thus, the monitoring component monitors the environmental parameters inside the enclosure, such as the air flow rate and temperature inside the component box, and uploads these environmental parameters to the control component. The control component compares the environmental parameters with preset thresholds to confirm the operating state of the environmental control device. When the environmental control device is in an abnormal operating state, such as when the air flow rate inside the component box is lower than the preset threshold or the temperature inside the component box is higher than the preset threshold, the control component cuts off the power supply circuit of the environmental control device. This ensures that the power supply circuit of the environmental control device is cut off in time when the environmental control device malfunctions, preventing the environmental control device from burning out. Attached Figure Description

[0015] Figure 1 This is a perspective view of the box-type electrical equipment with abnormal protection function according to this application.

[0016] Figure 2 This is a cross-sectional view of the box-type electrical equipment with abnormal protection function according to this application.

[0017] Figure 3 This is a schematic diagram of the control circuit of the control component of this application.

[0018] Figure 4 This is a secondary schematic diagram of the control circuit of the control component of this application.

[0019] In the figure: box-type electrical equipment with abnormal protection function 10, box device 20, component box 21, electrical box body 22, ventilation duct 23, ventilation opening 24, environmental control device 30, heat dissipation fan 31, heating and dehumidification component 32, auxiliary protection device 40, monitoring component 41, flow rate sensor 411. Detailed Implementation

[0020] The technical solutions and effects of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0021] Please refer to Figure 1 This utility model provides a box-type electrical equipment 10 with abnormal protection function, including a box assembly 20, an environmental control device 30, and an auxiliary protection device 40. The box assembly 20 contains N component boxes 21 for installing electrical components. The environmental control device 30 is installed inside the box assembly 20 to regulate the operating environment of each component box 21 within the box assembly 20. The auxiliary protection device 40 is installed inside the box assembly 20 and includes a monitoring component 41 and a control component. The monitoring component 41 is electrically connected to the control component and is installed inside the box assembly 20 to monitor environmental parameters within the box assembly 20 and upload these parameters to the control component. The control component is electrically connected to the power supply circuit of the environmental control device 30 and is used to compare the environmental parameters with a preset threshold to determine the environmental control device 30's operation. The system monitors the environmental parameters inside the enclosure, such as the airflow rate and temperature inside the component box 21, and uploads these parameters to the control component. The control component compares the environmental parameters with preset thresholds to confirm the operating status of the environmental conditioning device 30. When the environmental conditioning device 30 is in an abnormal operating state, such as when the airflow rate inside the component box is lower than the preset threshold or the temperature inside the component box is higher than the preset threshold, the control component cuts off the power supply circuit of the environmental conditioning device 30. This ensures that the power supply circuit of the environmental conditioning device 30 is cut off in time when the environmental conditioning device 30 malfunctions, preventing the environmental conditioning device 30 from burning out.

[0022] Furthermore, the auxiliary protection device 40 also includes an alarm component, which includes an audible and visual alarm and a signal transmitter. Both the audible and visual alarm and the signal transmitter are electrically connected to the control component. The audible and visual alarm is installed outside the enclosure device 20 and is used to issue an audible and visual alarm signal when the control component cuts off the power supply circuit of the environmental control device 30. The signal transmitter is installed inside the enclosure device 20 and is used to send an alarm signal to the monitoring backend when the control component cuts off the power supply circuit of the environmental control device 30.

[0023] In this embodiment, the audible and visual alarm and the signal transmitter are triggered synchronously.

[0024] In this embodiment, the signal transmitter is a WiFi / 5G communication module to send alarm signals to the monitoring backend via the Internet of Things, for example, by sending a notification to a mobile APP.

[0025] Furthermore, the enclosure device 20 also includes an electrical enclosure body 22 and N ventilation ducts 23. The electrical enclosure body 22 has N ventilation openings 24, and each ventilation opening 24 is connected to a component box 21 to connect each component box to the outside. One end of each ventilation duct 23 is connected to the top surface of a component box 21, and the other end passes through the electrical enclosure body 22 to connect to the outside. Each ventilation opening 24 and each ventilation duct 23 is used to connect the corresponding component box 21 to the outside.

[0026] Please refer to Figure 2 Furthermore, the environmental control device 30 includes N cooling fans 31 and N heating and dehumidifying components 32. Each component box 21 is equipped with a cooling fan 31 and a heating and dehumidifying component 32. The cooling fan 31 is installed on the top of the component box 21 and located in the ventilation duct 23. It is used to blow the air inside the component box 21 so that the air enters the component box 21 from the vent 24 and exits the component box 21 along the ventilation duct 23, thereby removing the heat inside the component box 21 and reducing the temperature inside the component box 21. The heating and dehumidifying component 32 is installed at the bottom of the component box 21 and is used to dry the component box 21 by heating, thereby reducing the humidity inside the component box 21. In this way, the temperature and humidity inside the component box 21 are regulated by the cooling fan 31 and the heating and dehumidifying component 32 so that the electrical components inside the component box 21 can work normally.

[0027] Furthermore, the monitoring component 41 includes N flow rate sensors 411, N heat dissipation temperature sensors, N ambient temperature sensors, and N heating and dehumidification temperature sensors. Each ventilation duct 23 has a corresponding flow rate sensor 411 installed to monitor the air flow rate within the ventilation duct 23. Each cooling fan 31 has a heat dissipation temperature sensor installed to monitor the temperature of the cooling fan 31. Each component box 21 has an ambient temperature sensor installed to monitor the temperature within the component box 21. Each heating and dehumidification component 32 has a heating and dehumidification temperature sensor installed to monitor the temperature of the heating and dehumidification component 32.

[0028] In this embodiment, the flow velocity sensor 411 uses a non-contact ultrasonic sensor to replace the traditional mechanical flow velocity detection device, avoiding the problems of mechanical component wear and dust interference, and improving detection accuracy and reliability.

[0029] Furthermore, the control component includes N flow rate relays and N temperature relays. Each flow rate relay is electrically connected to a cooling fan 31, and also electrically connected to a cooling temperature sensor corresponding to the cooling fan 31 and a flow rate sensor 411 in the corresponding ventilation duct. When the temperature detected by the cooling temperature sensor is higher than a preset threshold and the flow rate detected by the flow rate sensor 411 is lower than a preset threshold, the power circuit of the cooling fan 31 is disconnected; otherwise, it does not operate. Each temperature relay is electrically connected to a heating and dehumidifying component 32, and also electrically connected to a heating and dehumidifying temperature sensor corresponding to the heating and dehumidifying component 32 and an ambient temperature sensor in the corresponding component box. When the temperature detected by the heating and dehumidifying temperature sensor is higher than a preset threshold and the ambient temperature sensor detects a temperature higher than a preset threshold, the power circuit of the heating and dehumidifying component 32 is disconnected; otherwise, it does not operate.

[0030] Furthermore, the control component also includes N flow rate contactors and N temperature contactors. Each flow rate contactor is electrically connected to a flow rate relay and the power circuit of the corresponding cooling fan, and is used to connect or disconnect the power circuit of the cooling fan. Each temperature contactor is electrically connected to a temperature relay and the power circuit of the corresponding heating and dehumidifying component, and is used to connect or disconnect the power circuit of the heating and dehumidifying component.

[0031] Furthermore, all flow rate relays and temperature relays are silicon carbide solid-state relays; all flow rate contactors and temperature contactors are silicon carbide solid-state contactors. Compared with traditional silicon-based solid-state relays and silicon-based solid-state contactors, silicon carbide solid-state relays and silicon carbide solid-state contactors have significant advantages in voltage resistance, energy efficiency and lifespan, and can adapt to more demanding industrial environments.

[0032] In this embodiment, the connection circuit of the flow rate contactor, temperature contactor, flow rate contactor, cooling fan, and heating / dehumidifying component is as follows: Figure 3 As shown, KM1 is a flow rate contactor and KM2 is a temperature contactor.

[0033] In this embodiment, the logic circuit of the control component is as follows: Figure 4 As shown, KM1 is a flow rate contactor, KM2 is a temperature contactor, SF is a flow rate detection switch, T1 is a cooling fan temperature control switch, T2 is a heating and dehumidifying component temperature control switch, T3 is an electrical box temperature control switch, DL is the power supply for the alarm component, K1-1 is the coil of the flow rate relay, K1-2 is the normally open contact of the flow rate relay, K1-3 is the normally closed contact of the flow rate relay, K2-1 is the coil of the temperature relay, K2-2 is the normally open contact of the temperature relay, and K2-3 is the normally closed contact of the temperature relay. Furthermore, K1-1, K1-2, and K1-3 constitute the flow rate relay as described above; K2-1, K2-2, and K2-3 constitute the temperature relay as described above.

[0034] Specifically, the working logic of the logic circuit is as follows:

[0035] 1. During normal operation:

[0036] If the flow rate detected by SF is higher than the preset threshold, the system will remain disconnected.

[0037] T1 detects a temperature below a preset threshold and remains disconnected.

[0038] SF and T1 are both in the open state, K1-1 is not energized, K1-2 remains in the open state, and K1-3 remains in the closed state;

[0039] K1-3 is in the closed state, KM1 is energized, and the power supply circuit of cooling fan 31 is connected;

[0040] T2 detects a temperature below a preset threshold and remains disconnected.

[0041] T3 detects a temperature below a preset threshold and remains disconnected.

[0042] T2 and T3 are both in the open state, K2-1 is not energized, K2-2 remains in the open state, and K2-3 remains in the closed state;

[0043] K2-3 is in the closed state, KM2 is energized, and the power supply circuit of the heating and dehumidifying component 32 is connected.

[0044] Both K1-2 and K2-2 are in the off state, DL is not powered, and the alarm component is in the off state;

[0045] 2. If only the cooling fan 31 is observed, and the airflow rate of the cooling fan 31 is abnormal, but the temperature of the cooling fan 31 is normal:

[0046] If the flow rate detected by SF is lower than the preset threshold, the system will switch to a closed state.

[0047] T1 detects a temperature below a preset threshold and remains disconnected.

[0048] SF is in the closed state, T1 is in the open state, K1-1 is not energized, K1-2 remains in the open state, and K1-3 remains in the closed state.

[0049] K1-3 is in the closed state, KM1 is energized, and the power supply circuit of cooling fan 31 is connected;

[0050] Both K1-2 and K2-2 are in the off state, DL is not powered, and the alarm component is in the off state;

[0051] 3. If only the cooling fan 31 is checked, and the airflow rate of the cooling fan 31 is normal, but the temperature of the cooling fan 31 is abnormal:

[0052] If the flow rate detected by SF is higher than the preset threshold, the system will remain disconnected.

[0053] When the temperature detected by T1 is higher than the preset threshold, it switches to the closed state.

[0054] SF is in the open state, T1 is in the closed state, K1-1 is not energized, K1-2 remains in the open state, and K1-3 remains in the closed state.

[0055] K1-3 is in the closed state, KM1 is energized, and the power supply circuit of cooling fan 31 is connected;

[0056] Both K1-2 and K2-2 are in the off state, DL is not powered, and the alarm component is in the off state;

[0057] 4. If only the cooling fan 31 is observed, and the airflow rate or temperature of the cooling fan 31 is abnormal:

[0058] If the flow rate detected by SF is lower than the preset threshold, the system will switch to a closed state.

[0059] When the temperature detected by T1 is higher than the preset threshold, it switches to the closed state.

[0060] When both SF and T1 are closed, K1-1 is energized, K1-2 switches to the closed state, and K1-3 switches to the open state;

[0061] K1-3 is in the off state, KM1 is de-energized, and the power supply circuit of cooling fan 31 is disconnected;

[0062] K1-2 is in the closed state, K2-2 is in the open state, DL is energized, and the alarm component is in the on state;

[0063] 5. Only check the heating and dehumidifying component 32. If the temperature of the heating and dehumidifying component 32 is abnormal, but the electrical box temperature is normal:

[0064] When the temperature detected by T2 is higher than the preset threshold, it switches to the closed state.

[0065] T3 detects a temperature below a preset threshold and remains disconnected.

[0066] T2 is in the closed state, T3 is in the open state, K2-1 is not energized, K2-2 remains in the open state, and K2-3 remains in the closed state.

[0067] K2-3 is in the closed state, KM2 is energized, and the power supply circuit of the heating and dehumidifying component 32 is connected.

[0068] Both K1-2 and K2-2 are in the off state, DL is not powered, and the alarm component is in the off state;

[0069] 6. If only the heating and dehumidifying element 32 is checked, and the temperature of the heating and dehumidifying element 32 is normal, but the temperature of the electrical box is abnormal:

[0070] T2 detects a temperature below a preset threshold and remains disconnected.

[0071] When the temperature detected by T3 is higher than the preset threshold, it switches to the closed state.

[0072] T2 is in the open state, T3 is in the closed state, K2-1 is not energized, K2-2 remains in the open state, and K2-3 remains in the closed state.

[0073] K2-3 is in the closed state, KM2 is energized, and the power supply circuit of the heating and dehumidifying component 32 is connected.

[0074] Both K1-2 and K2-2 are in the off state, DL is not powered, and the alarm component is in the off state;

[0075] 7. If only the heating and dehumidifying element 32 is checked, and the temperature of the heating and dehumidifying element 32 is abnormal, or if the temperature of the electrical box is abnormal, then...

[0076] When the temperature detected by T2 is higher than the preset threshold, it switches to the closed state.

[0077] When the temperature detected by T3 is higher than the preset threshold, it switches to the closed state.

[0078] When T2 and T3 are both closed, K2-1 is energized, K2-2 switches to the closed state, and K2-3 switches to the open state;

[0079] K2-3 is in the off state, KM2 is de-energized, and the power supply circuit of heating and dehumidifying component 32 is disconnected.

[0080] K1-2 is in the open state, K2-2 is in the closed state, DL is energized, and the alarm component is in the open state;

[0081] The combined judgment result of the cooling fan 31 and the heating and dehumidifying component 32 can be derived from the above description, and will not be repeated here.

[0082] In one embodiment, the flow rate detection switch, the cooling fan temperature control switch, the heating and dehumidifying component temperature control switch, and the electrical box temperature control switch are all electronic switches. The signal processing unit processes the data collected by the flow rate sensor 411, the cooling temperature sensor, the ambient temperature sensor, and the heating and dehumidifying temperature sensor to determine whether the data has reached the corresponding threshold, thereby triggering the closing or opening of the corresponding node.

[0083] In one implementation, it is not necessary to install heat dissipation temperature sensors, ambient temperature sensors, and heating and dehumidification temperature sensors. The temperature control switches for the cooling fan, heating and dehumidification components, and electrical box are all mechanical temperature control switches, such as bimetallic strip temperature control switches. These are made of two metals with different coefficients of thermal expansion bonded together. When the temperature changes, they will bend and deform due to the difference in expansion rates, directly triggering the closing or opening of the corresponding node. Compared with electronic switches, this type of mechanical temperature control switch has the advantage of not relying on sensors, but it also has disadvantages such as fixed threshold, small adjustment range, and slow response speed.

[0084] In one implementation, by separately installing an auxiliary protection device into the old box-type electrical equipment, the operating environment regulation device of the old box-type electrical equipment is protected, thereby reducing the failure rate of the old box-type electrical equipment.

[0085] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A box-type electrical device with abnormal protection function, characterized in that, The device includes a housing, an environmental control device, and an auxiliary protection device. The housing contains N component boxes for housing electrical components. The environmental control device, installed inside the housing, regulates the operating environment of each component box. The auxiliary protection device, also installed inside the housing, includes a monitoring component and a control component. The monitoring component is electrically connected to the control component and monitors environmental parameters within the housing, uploading these parameters to the control component. The control component is electrically connected to the power supply circuit of the environmental control device, comparing the environmental parameters with preset thresholds to determine the operating status of the environmental control device and cutting off its power supply when it is in an abnormal operating state. Wherein, N≥1; the enclosure device also includes an electrical enclosure body and N ventilation ducts. The electrical enclosure body has N ventilation openings, and each ventilation opening is connected to a component box to connect each component box to the outside. One end of each ventilation duct is connected to the top surface of a component box, and the other end passes through the electrical enclosure body to connect to the outside. The environmental control device includes N cooling fans and N heating and dehumidifying components. Each component box is equipped with a cooling fan and a heating and dehumidifying component. The cooling fan is installed on the top of the component box and is located inside the ventilation duct. It is used to blow the air inside the component box so that the air enters the component box from the ventilation opening and exits the component box along the ventilation duct to remove the heat inside the component box. The heating and dehumidifying component is installed at the bottom of the component box and is used to dry the component box by heating.

2. The box-type electrical equipment with abnormal protection function as described in claim 1, characterized in that, The auxiliary protection device also includes an alarm component, which includes an audible and visual alarm element and a signal transmitter. Both the audible and visual alarm element and the signal transmitter are electrically connected to the control component. The audible and visual alarm element is installed outside the enclosure and is used to issue an audible and visual alarm signal when the control component cuts off the power supply circuit of the environmental control device. The signal transmitter is installed inside the enclosure and is used to send an alarm signal to the monitoring backend when the control component cuts off the power supply circuit of the environmental control device.

3. The box-type electrical equipment with abnormal protection function as described in claim 1, characterized in that, The monitoring components include N flow rate sensors, N heat dissipation temperature sensors, N ambient temperature sensors, and N heating and dehumidification temperature sensors. Each ventilation duct has a corresponding flow rate sensor installed to monitor the air flow rate within the ventilation duct. Each cooling fan has a heat dissipation temperature sensor installed to monitor the temperature of the cooling fan. Each component box has an ambient temperature sensor installed to monitor the temperature inside the component box. Each heating and dehumidification component has a heating and dehumidification temperature sensor installed to monitor the temperature of the heating and dehumidification component.

4. The box-type electrical equipment with abnormal protection function as described in claim 3, characterized in that, The control component includes N flow rate relays and N temperature relays. Each flow rate relay is electrically connected to a cooling fan, and also electrically connected to a cooling temperature sensor corresponding to the cooling fan and a flow rate sensor in the corresponding ventilation duct. When the temperature detected by the cooling temperature sensor is higher than a preset threshold and the flow rate detected by the flow rate sensor is lower than a preset threshold, the power circuit of the cooling fan is disconnected; otherwise, no operation is performed. Each temperature relay is electrically connected to a heating and dehumidifying component, and also electrically connected to a heating and dehumidifying temperature sensor corresponding to the heating and dehumidifying component and an ambient temperature sensor in the corresponding component box. When the temperature detected by the heating and dehumidifying temperature sensor is higher than a preset threshold and the ambient temperature sensor detects a temperature higher than a preset threshold, the power circuit of the heating and dehumidifying component is disconnected; otherwise, no operation is performed.

5. The box-type electrical equipment with abnormal protection function as described in claim 4, characterized in that, The control component also includes N flow rate contactors and N temperature contactors. Each flow rate contactor is electrically connected to a flow rate relay and the power circuit of the corresponding cooling fan, and is used to connect or disconnect the power circuit of the cooling fan. Each temperature contactor is electrically connected to a temperature relay and the power circuit of the corresponding heating and dehumidifying component, and is used to connect or disconnect the power circuit of the heating and dehumidifying component.

6. The box-type electrical equipment with abnormal protection function as described in claim 5, characterized in that, All flow rate relays and temperature relays are silicon carbide solid-state relays; all flow rate contactors and temperature contactors are silicon carbide solid-state contactors.

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