An electric control cabinet heat dissipation and fire prevention device

Abstract

The utility model belongs to electric control cabinet technical field provides a kind of electric control cabinet heat dissipation and fire prevention device, including air conditioner, fire -retardant gas tank and at least three electric control cabinets, the air outlet of air conditioner is connected with the air inlet of each electric control cabinet by air intake pipe, the gas outlet of fire -retardant gas tank is connected with gas pipe, gas pipe is close to air conditioner and air intake pipe intercommunication;Each electric control cabinet receives the cool air provided by air conditioner by air intake pipe, and each electric control cabinet receives the fire -retardant gas provided by fire -retardant gas tank by gas pipe and air intake pipe.The utility model can carry out centralized heat dissipation cooling to multiple electric control cabinets, and high temperature warning can also be carried out to electric control cabinet and fire prevention measures are taken in time.

Description

Technical Field

[0001] This application relates to the field of electrical control cabinet technology, and in particular to a heat dissipation and fire prevention device for electrical control cabinets. Background Technology

[0002] Electrical control cabinets and distribution cabinets typically house various control components, some of which generate significant heat during operation, causing the internal temperature of the control cabinet to rise continuously. Therefore, all control cabinets require heat dissipation. Traditional control cabinets usually have vents and exhaust fans installed on the cabinet body for cooling, with filters at the vents to remove dust from the air. However, some factories have hundreds of control cabinets installed, requiring regular cleaning of the filters in these traditional cabinets, resulting in a large workload. Furthermore, if the control cabinet generates excessive heat, and exhaust fans cannot meet the cooling requirements, some companies install air conditioners on the control cabinet itself to enhance cooling. However, this method also leads to a large workload for air conditioner maintenance when there are many control cabinets; moreover, the high heat generated by the components inside the control cabinet increases the risk of fire, and the influence of air conditioning hinders timely firefighting.

[0003] To address the issues of poor heat dissipation and high maintenance workload in the aforementioned electrical control cabinets, researchers have developed various heat dissipation electrical control cabinets. For example, patent CN217088371U discloses a heat dissipation system for an electrical control cabinet in a silk-making workshop. By using several temperature sensors installed in multiple preset areas within the electrical control cabinet to monitor temperature changes throughout the cabinet, the system can trigger the operation of the cabinet air conditioner and the guide fans located in each area according to predetermined temperature standards. The guide fans can send hot air from inside the cabinet into the cabinet air conditioner along the first air duct, while the cool air generated by the cabinet air conditioner can be sent into the cabinet along the second air duct and by the guide fans. For example, patent application CN102434925A discloses a centralized energy-saving air conditioning cooling system for electrical control cabinets. It consists of a refrigeration compressor, condenser, cooling tower, circulating water pump, cooling tower nozzle, liquid working fluid tank, shielded magnetic pump, electrical cabinet evaporator, shut-off solenoid valve, throttling device, bypass solenoid valve, and compressor inlet solenoid valve. The high-temperature and high-pressure gas sent by the refrigeration compressor is condensed into liquid working fluid by the circulating water supplied by the cooling tower when it passes through the condenser and is stored in the liquid working fluid tank. Then it is pumped to the evaporators of each electrical cabinet for evaporation and cooling, thereby achieving the purpose of cooling the electrical control cabinet. When the ambient temperature is lower than the saturation temperature of the working fluid in the evaporator in winter, the inlet solenoid valve can be closed, the solenoid valve can be opened, and the compressor can be stopped. The refrigeration cycle can be completed using only the shielded magnetic pump below the liquid working fluid tank, thereby achieving energy-saving air conditioning to cool the electrical control cabinet.

[0004] However, the aforementioned heat dissipation system and air conditioning cooling system only dissipate heat and cool down the high-temperature electrical control cabinet inside the cabinet. When the electrical control cabinet is at risk of fire under high temperature instantaneous conditions, the above two systems do not have corresponding solutions and have no fire prevention function. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a heat dissipation and fire prevention device for electrical control cabinets. It can centrally dissipate heat and cool down multiple electrical control cabinets, and can also provide high-temperature warnings for electrical control cabinets to take timely fire prevention measures.

[0006] To achieve the above objectives, this utility model provides a heat dissipation and fire prevention device for an electrical control cabinet, including an air conditioner, a flame-retardant gas canister, and at least three electrical control cabinets. The air outlet of the air conditioner is connected to the air inlet of each electrical control cabinet through an air inlet pipe. A gas pipe is connected to the gas outlet of the flame-retardant gas canister, and the gas pipe is close to the air conditioner and connected to the air inlet pipe.

[0007] Each electrical control cabinet receives cold air from the air conditioner through an air inlet duct, and each electrical control cabinet receives flame-retardant gas from a flame-retardant gas tank through a gas pipe and an air inlet duct.

[0008] Furthermore, a temperature probe is installed in the electrical control cabinet.

[0009] Furthermore, a filter, a cooling coil, and a fan are installed sequentially inside the air conditioner along the direction of airflow.

[0010] Furthermore, the device also includes an electrical control room, with at least three electrical control cabinets installed on the floor of the control room.

[0011] Furthermore, the device also includes an exhaust fan, with a floor interlayer between the floor and the electrical control room, and the exhaust fan is mounted on the side wall of the floor interlayer.

[0012] Furthermore, each electrical control cabinet is connected to an air outlet duct. The cold air entering the electrical control cabinet is heated and then discharged from the electrical control room through the air outlet duct and the exhaust fan.

[0013] Furthermore, electric air valves and one-way valves are installed on the air inlet pipe, air pipe, and air outlet pipe.

[0014] Furthermore, the electrical control room also includes a suspended ceiling, which is installed away from the floor and forms a suspended ceiling mezzanine between the electrical control room and the floor.

[0015] Furthermore, the device also includes a controller.

[0016] Furthermore, the controller is electrically connected to the temperature probe, the electric air valve, and the check valve, respectively.

[0017] The beneficial technical effects of this utility model are as follows:

[0018] This utility model integrates a dedicated air-cooling air conditioner with multiple electrical control cabinets. Cool air is delivered to each electrical control cabinet through the air inlet pipe for heat exchange and heat dissipation, and then delivered to the outside through the air outlet pipe and exhaust fan. When the temperature probe detects that the temperature inside a certain electrical control cabinet is extremely high, indicating a fire hazard or fire, the flame-retardant gas in the flame-retardant gas tank can automatically enter the electrical control cabinet to prevent or extinguish the fire.

[0019] This utility model air conditioner is equipped with a filter, and each air inlet and outlet pipe is equipped with a one-way valve. With this structural design, the operator only needs to clean the air conditioner filter regularly, without having to clean the filters of multiple electrical control cabinets regularly, thus reducing the workload of maintenance. The one-way valve can prevent heat from interfering with each other in the electrical control cabinet, which greatly reduces the maintenance and cleaning labor intensity of the cooling structure of each electrical control cabinet, and the heat dissipation and cooling effect is good. Attached Figure Description

[0020] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the heat dissipation and fire prevention device of the electrical control cabinet in this application.

[0022] Figure Labels

[0023] 1: Air conditioner; 11: Filter; 12: Cooler; 13: Fan; 2: Flame-retardant gas tank; 3: Electrical control room; 31: First electrical control cabinet; 32: Second electrical control cabinet; 33: Third electrical control cabinet; 4: Temperature probe; 34: Ceiling mezzanine; 35: Ceiling; 36: Floor; 37: Floor mezzanine; 38: Exhaust fan; 5: Electric air valve; 6: Check valve. Detailed Implementation

[0024] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of this invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of this invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of this invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The present invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of this invention are for illustrative purposes only and should not be construed as limiting the scope of protection of this invention. All equivalent changes or modifications made in accordance with the spirit and essence of this invention should be covered within the scope of protection of this invention.

[0025] like Figure 1 As shown, this utility model provides a heat dissipation and fire prevention device for electrical control cabinets, including an air conditioner 1, a flame-retardant gas tank 2, and at least three electrical control cabinets. The air outlet of the air conditioner 1 is connected to the air inlet of each electrical control cabinet through an air inlet pipe. The air outlet of the flame-retardant gas tank 2 is connected to a gas pipe, which is close to the air conditioner 1 and connected to the air inlet pipe. Each electrical control cabinet receives cold air provided by the air conditioner 1 through the air inlet pipe, and each electrical control cabinet receives flame-retardant gas provided by the flame-retardant gas tank 2 through the gas pipe and the air inlet pipe.

[0026] Furthermore, the air conditioner 1 in this application is a dedicated air conditioner for cooling large electrical control cabinets. It is used to centrally supply chilled water to multiple parallel electrical control cabinets for heat exchange and dissipation. Therefore, the air conditioner 1 in this application is a high-power air conditioner 1, such as a 5kW industrial air conditioner. Even further, such as... Figure 1 As shown, a filter 11, a surface cooler 12, and a fan 13 are installed sequentially along the airflow direction inside the air conditioner 1. After indoor or outdoor fresh air enters the air conditioner 1, it is filtered by the filter 11 to remove dust contained in the airflow, forming relatively pure fresh air. The fresh air is cooled down by the surface cooler 12 inside the air conditioner 1, becoming cold air. The cold air is then pressurized by the fan 13, and the pressurized cold air is delivered to each electrical control cabinet through the air inlet pipe.

[0027] Furthermore, the air inlet duct of this application includes a main air inlet pipe and multiple air inlet branch pipes connected in parallel to the main air inlet pipe. The air inlet branch pipes are connected to the main air inlet pipe, and each air inlet branch pipe is connected to the air inlet of an electrical control cabinet. Both the main air inlet pipe and the air inlet branch pipes are equipped with an electric air valve 5 and a one-way valve 6. When it is necessary to supply cold air to the electrical control cabinets, the cold air generated in the air conditioner 1 is delivered to each air inlet branch pipe via the electric air valve 5, the one-way valve 6, and the main air inlet pipe, respectively supplying cold air to the first electrical control cabinet 31, the second electrical control cabinet 32, and the third electrical control cabinet 33 for heat dissipation.

[0028] Furthermore, a temperature probe 4 is installed in the electrical control cabinet. Each electrical control cabinet in this application is equipped with a temperature probe 4 for real-time monitoring of the temperature inside the cabinet and remote display of the temperature value. The installation methods for the temperature probe 4 include, but are not limited to, fixing the temperature probe 4 to the cabinet using screws or magnetic bases, inserting the temperature probe 4 into the electrical control cabinet through drilled holes or pre-drilled holes, and sealing the openings. The installation location of the temperature probe 4 can be selected according to actual needs. For example, it can be installed near components with high heat generation inside the electrical control cabinet, such as frequency converters or power modules; installed in corners with poor air circulation to ensure that the temperature probe 4 accurately reflects the temperature inside the cabinet; and kept away from heat sources such as the cold air inlet / outlet of the air conditioner 1, the cooling exhaust fan 38, etc., to prevent measurement distortion. The type of temperature probe 4 in this application is selected specifically according to its applicable scenario; for example, the temperature probe 4 can be a thermocouple, an infrared probe, etc.

[0029] Furthermore, the device also includes an electrical control room 3, with at least three electrical control cabinets installed on the floor 36 of the electrical control room 3. The electrical control room 3 of this application is used for centralized control, monitoring, and protection of production equipment and the power system; at least three electrical control cabinets, such as the first electrical control cabinet 31, the second electrical control cabinet 32, and the third electrical control cabinet 33, are installed in parallel on the floor 36 at intervals. The interval can be set according to actual needs, for example, 1.5m to 2m, to ensure air circulation between adjacent cabinets, avoid heat accumulation, and reduce the risk of equipment failure due to overheating. A floor interlayer 37 exists between the floor 36 and the electrical control room 3. Specifically, the floor 36 can be an anti-static floor, etc., and the floor interlayer 37 allows for the installation of ventilation channels, cable trays, exhaust fans 38, and other devices to further improve heat dissipation.

[0030] Furthermore, such as Figure 1 As shown, the device also includes an exhaust fan 38, which is mounted on the side wall of the floor interlayer 37. This application mounts the exhaust fan 38 on the side wall of the interlayer, avoiding the occupation of internal space in the electrical control cabinet and facilitating the layout of equipment and the design of heat dissipation ducts within the cabinet. Furthermore, the side wall mounting location is typically easily accessible to personnel, eliminating the need to move the electrical control cabinet during routine cleaning, maintenance, or replacement of the exhaust fan 38, thus reducing maintenance costs.

[0031] Furthermore, such as Figure 1As shown, each electrical control cabinet is connected to an air outlet duct. Cold air entering the control cabinet undergoes heat exchange to form hot air, which is then discharged from the control room 3 through the air outlet duct at the exhaust fan 38. The air outlet duct of this application includes a main air outlet duct and branch air outlet ducts. One end of the branch air outlet duct is connected to the air outlet of the electrical control cabinet, and the other end is connected to the main air outlet duct. The air outlet of the main air outlet duct is located at the exhaust fan 38. Furthermore, each branch air outlet duct is equipped with an electric air valve 5 and a one-way valve 6.

[0032] Furthermore, such as Figure 1 As shown, the electrical control room 3 also includes a suspended ceiling 35, which is installed in the electrical control room 3 away from the floor 36, forming a suspended ceiling mezzanine 34 between the suspended ceiling 35 and the electrical control room 3. The suspended ceiling mezzanine 34 can be used to conceal cables, ventilation ducts, fire pipes, air conditioning 1 lines, and other facilities in the electrical control room 3, keeping the electrical control room 3 neat and aesthetically pleasing, and avoiding visual clutter caused by exposed wiring. Specifically, some of the main air intake pipes, multiple branch air intake pipes, and the electric air valves 5 and one-way valves 6 installed on the branch air intake pipes are all located in the suspended ceiling mezzanine 34.

[0033] Furthermore, in this application, the main air outlet pipe and multiple branch air outlet pipes, along with the electric air valves 5 and one-way valves 6 installed on the branch air outlet pipes, are all located within the floor interlayer 37. Even further, the ceiling 35 and floor 36 of this application are designed for easy disassembly and installation, or have access panels for maintenance.

[0034] Furthermore, such as Figure 1 As shown, the air pipe of this application is equipped with an electric air valve 5 and a one-way valve 6.

[0035] Furthermore, the device also includes a controller (not shown in the figure), which is electrically connected to the temperature probe 4, the electric air valve 5, and the one-way valve 6, respectively.

[0036] Furthermore, the working principle of the device in this application is as follows:

[0037] When the temperature probe 4 detects that the temperature inside the first electrical control cabinet 31 is too high, it feeds back the temperature signal to the controller. The controller controls the air conditioner 1 to start and delivers cold air to the first electrical control cabinet 31 through the electric valve, one-way valve 6, main air intake pipe, and branch air intake pipe. After the cold air absorbs heat in the first electrical control cabinet 31, it becomes hot air. The hot air then flows into the main air intake pipe through the branch air outlet pipe, one-way valve 6, and electric air valve 5, and is discharged outdoors through the exhaust fan 38.

[0038] When the temperature probe 4 detects that the temperature inside the second electrical control cabinet 32 ​​is too high, it feeds back the temperature signal to the controller. The controller controls the air conditioner 1 to start and delivers cold air to the second electrical control cabinet 32 ​​through the electric valve, one-way valve 6, main air intake pipe, and branch air intake pipe. After the cold air absorbs heat in the second electrical control cabinet 32, it becomes hot air. The hot air then flows into the main air intake pipe through the branch air outlet pipe, one-way valve 6, and electric air valve 5, and is discharged outdoors through the exhaust fan 38.

[0039] When the temperature probe 4 detects that the temperature inside the third electrical control cabinet 33 is too high, it feeds back the temperature signal to the controller. The controller controls the air conditioner 1 to start and delivers cold air to the third electrical control cabinet 33 through the electric valve, one-way valve 6, main air intake pipe, and branch air intake pipe. After the cold air absorbs heat in the third electrical control cabinet 33, it becomes hot air. The hot air then flows into the main air intake pipe through the branch air outlet pipe, one-way valve 6, and electric air valve 5, and is discharged outdoors through the exhaust fan 38.

[0040] When the temperature probes 4 in the first electrical control cabinet 31, the second electrical control cabinet 32, and the third electrical control cabinet 33 detect that the temperature inside the electrical control cabinet is extremely high, i.e., the ignition temperature, in an emergency, the electric air valve 5 at the outlet of the air conditioner 1 and the one-way valve 6 will automatically close, while the electric air valve 5 and the one-way valve 6 on the gas pipe will open. The flame-retardant gas in the flame-retardant gas tank 2 will enter each electrical control cabinet through the gas pipe, the main air inlet pipe, and each air inlet branch pipe. The flame-retardant gas will cause the electrical control cabinet to lack oxygen and thus prevent ignition.

[0041] Furthermore, the one-way valve 6 on the main air inlet pipe and the one-way valve 6 on the gas pipe can prevent cold air and flame-retardant gas from interfering with each other when the electric air valve 5 malfunctions or does not close tightly. The one-way valve 6 on the branch air inlet pipe and the one-way valve 6 on the branch air outlet pipe can prevent heat from interfering with each other inside the electrical control cabinet.

[0042] Furthermore, each electrical control cabinet in this application does not have an independent fan and filter. Only the filter 11 inside the air conditioner 1 needs to be cleaned to ensure the cleanliness of the cold air inside each electrical control cabinet. This greatly reduces the maintenance and cleaning labor intensity of the cooling system of each electrical control cabinet, and the electrical control cabinet has good heat dissipation and fire prevention effects.

[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A heat dissipation and fire prevention device for an electrical control cabinet, characterized in that, It includes an air conditioner (1), a flame-retardant gas tank (2) and at least three electrical control cabinets. The air outlet of the air conditioner (1) is connected to the air inlet of each of the electrical control cabinets through an air inlet pipe. The gas outlet of the flame-retardant gas tank (2) is connected to a gas pipe, which is close to the air conditioner (1) and connected to the air inlet pipe. Each of the electrical control cabinets receives cold air from the air conditioner (1) through the air inlet pipe, and each of the electrical control cabinets receives flame-retardant gas from the flame-retardant gas tank (2) through the gas pipe and the air inlet pipe.

2. The apparatus according to claim 1, characterized in that, Temperature probes (4) are installed in the electrical control cabinet.

3. The apparatus according to claim 1 or 2, characterized in that, The air conditioner (1) is equipped with a filter (11), a surface cooler (12) and a fan (13) in sequence along the airflow direction.

4. The apparatus according to claim 3, characterized in that, The device also includes an electrical control room (3), with at least three of the electrical control cabinets installed on the floor (36) of the electrical control room (3).

5. The apparatus according to claim 4, characterized in that, The device also includes an exhaust fan (38), and there is a floor interlayer (37) between the floor (36) and the electrical control room (3), with the exhaust fan (38) mounted on the side wall of the floor interlayer (37).

6. The apparatus according to claim 5, characterized in that, Each of the electrical control cabinets is connected to an air outlet duct. The cold air entering the electrical control cabinet is heated in the cabinet and then discharged from the exhaust fan (38) through the air outlet duct to the electrical control room (3).

7. The apparatus according to claim 6, characterized in that, Electric air valves (5) and one-way valves (6) are installed on the air inlet pipe, the air pipe and the air outlet pipe.

8. The apparatus according to claim 4, 5, 6 or 7, characterized in that, The electrical control room (3) also includes a suspended ceiling (35), which is installed in the electrical control room (3) away from the floor (36) and forms a suspended ceiling interlayer (34) between the electrical control room (3) and the electrical control room (3).

9. The apparatus according to claim 8, characterized in that, The device also includes a controller.

10. The apparatus according to claim 9, characterized in that, The controller is electrically connected to the temperature probe (4), the electric air valve (5), and the one-way valve (6), respectively.

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