Heat dissipation device and heat dissipation method of column-mounted totally-enclosed cabinet

Abstract

The invention discloses a heat dissipation device and a heat dissipation method of a pole-mounted totally-enclosed cabinet. The heat dissipation device comprises a heat dissipation device and a control device, the heat dissipation device comprises internal circulation heat dissipation fins arranged in the middle of the base plate, external circulation heat dissipation fins arranged on the edge of the base plate, an internal circulation fan set for providing air flow for the internal circulation heat dissipation fins and a flow guide valve for controlling an air flow channel to be opened and closed in a one-way mode. The flow guide valve and the internal circulation fan unit are oppositely arranged below the internal circulation fins; a sealing plate surrounding the internal circulation heat dissipation fins is arranged on the base plate and above the internal circulation heat dissipation fins, the internal circulation fan set, the internal circulation heat dissipation fins and the flow guide valve form an internal circulation channel, and the external circulation heat dissipation fins and the external environment conduct convection heat exchange to take away heat of the internal circulation channel. The sealing plate is provided with a temperature sensor used for monitoring the temperature of the heat dissipation device and the internal and external environment and a control device used for collecting and processing temperature data and controlling starting and stopping of the internal circulation fan unit. Element faults and operation cost are reduced, the service life is prolonged, and environmental adaptability is improved.

Description

Technical Field

[0001] The invention relates to a heat dissipation device, in particular to a heat dissipation device of a fully enclosed cabinet installed on a column and a heat dissipation method thereof. Background Art

[0002] Smart distribution terminals are an important part of distribution automation construction. They are mainly used in 10kV overhead lines to complete the operation detection and monitoring functions of distribution lines, and realize real-time monitoring of primary equipment such as switchgear, ring network cabinets, pole switches, distribution transformers, capacitors, etc. on 10kV / 20kV distribution networks. With the global promotion and application of smart grid technology, the market demand for smart distribution terminals is increasing. The application environment covers all regions of the world. The strong electromagnetic radiation, high temperature, high humidity, high salt fog, high altitude, high cold and high dust in the application environment have put forward unprecedented high requirements for the environmental adaptability such as protection and heat dissipation of smart distribution terminals. Traditional distribution terminals radiate heat through the cabinet shell, and the heat dissipation per unit area is limited. The air convection inside the cabinet is weak, the air thermal resistance increases, and the heat is difficult to be effectively transferred to the cabinet wall. As a result, the internal air temperature is high for a long time, the core unit failure rate is high, and the battery life is seriously reduced. In addition, from the perspective of energy saving, environmental protection, cost reduction and efficiency improvement, the miniaturization, lightweight and portable design of smart distribution terminals have become the common goals pursued by various manufacturers. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to improve the heat dissipation efficiency of a fully enclosed cabinet, and enhance the service life and operating performance of components of an intelligent power distribution terminal, and to provide a heat dissipation device for a fully enclosed cabinet mounted on a pole; another purpose of the present invention is to provide a heat dissipation method using the above-mentioned heat dissipation device.

[0004] Technical solution: The heat dissipation device of the fully enclosed cabinet mounted on the column of the present invention includes a heat dissipation device and a control device. The heat dissipation device includes an internal circulation heat dissipation fin arranged in the middle of a base plate, an external circulation heat dissipation fin arranged at the edge of the base plate, an internal circulation fan unit for providing airflow to the internal circulation heat dissipation fins, and a guide valve for controlling the one-way opening and closing of the airflow channel; the guide valve and the internal circulation fan unit are arranged below the internal circulation fins relative to each other; a sealing plate surrounding the internal circulation heat dissipation fins is arranged on the base plate and above the internal circulation heat dissipation fins, the internal circulation fan unit and the internal circulation heat-spreading fins and the guide valve form an internal circulation channel, and the external circulation heat dissipation fins and the external environment conduct convection heat exchange to remove the heat of the internal circulation channel; the sealing plate is provided with a temperature sensor for monitoring the temperature of the heat dissipation device and the internal and external environments of the cabinet, and a control device for collecting and processing temperature data and controlling the start and stop of the internal circulation fan unit.

[0005] Furthermore, the inner and outer heat dissipation fins are connected to the base plate as a whole, and are formed by pultrusion or casting. Under the action of the internal circulation fan unit, the hot air inside the cabinet enters the heat dissipation device from the circulating air inlet of the fan box of the internal circulation fan unit located on the upper side of the cabinet and above the heat dissipation device. The circulating air flows through the internal circulation heat dissipation fins of the heat dissipation device and enters the cabinet from the guide valve located below the radiator. Under the guidance of the guide valve, the circulating air after heat exchange is evenly distributed on the surface of the power component installed inside the cabinet, and the next round of circulation is carried out under the action of the internal circulation fan unit until the heat dissipation cycle mode ends.

[0006] Furthermore, the external circulation heat dissipation fins are provided with vertical grooves and horizontal grooves which are beneficial to the rapid diffusion of heat flow in different wind directions. The cross-wind direction design of the fin slots can be applicable to a variety of wind directions when the wind direction of the external environment is uncertain, thereby improving the environmental applicability of the heat dissipation device and further improving the heat dissipation efficiency.

[0007] Furthermore, the internal circulation heat dissipation fins are provided with vertical grooves for directing the internal circulation wind to the outside, so that the internal circulation wind flows to the place with high heat and flows out quickly, bringing out the internal heat in time and improving the heat dissipation efficiency.

[0008] Furthermore, the internal circulation fan unit is a drawer-type structure, including a fan box and an adjustable speed fan built into the fan box. The hot air in the cabinet is sucked into the heat dissipation device for heat exchange treatment, and the heat-dissipated air is passed into the cabinet through a diversion valve to ensure that the power devices operate at the specified ambient temperature.

[0009] Furthermore, the diversion valve is composed of a metal / non-metal grid and a grid bracket, which is installed under the heat dissipation device by bolts to realize one-way opening and closing of the airflow channel under the action of wind pressure; the temperature sensor uses a thermocouple as a temperature sensor, which is used to monitor the radiator, the internal and external ambient temperatures of the cabinet respectively. The cabinet is a single-layer metal and non-metal fully enclosed structure, which is installed on the column through the cabinet back panel. The cabinet has a front door, and intelligent distribution terminal components such as batteries, power modules, core units, etc. are installed in layers from bottom to top.

[0010] Furthermore, the control device also includes a fault information feedback module, which determines the overheating fault or fan fault of the intelligent distribution terminal based on the collected temperature signal and current signal and transmits it to the background for recording and maintenance.

[0011] Furthermore, U-shaped grooves are provided around the base plate, threaded holes are provided in the grooves for threaded connection with the cabinet, and the U-shaped grooves of the base plate are filled with polyurethane foam seals for sealing to ensure stable circulation of the internal circulating airflow.

[0012] The heat dissipation method of the heat dissipation device of the fully enclosed cabinet installed on the column of the present invention comprises the following steps:

[0013] Two sets of heat dissipation devices are installed on the fully enclosed cabinet. After the temperature control cycle starts, the control device monitors the internal ambient temperature T of the intelligent power distribution terminal cabinet through the temperature sensor. In , External ambient temperature T Out and the temperature T of the two heat sinks S1 With T S2 ;

[0014] When the internal ambient temperature T In Exceeding the set temperature, such as 40°C, external environment temperature T Out When the temperature is lower than the internal ambient temperature indication, the fixed value judgment program is triggered, otherwise the temperature control cycle ends: the control device performs logical judgment on the value collected by the temperature sensor. S1 When the temperature is less than 40℃, the internal circulation fan unit switching judgment program is triggered, otherwise the temperature control cycle ends;

[0015] After the internal circulation fan unit switching judgment program is started, the control device re-judges the value collected by the temperature sensor. S1 ≤T S2 Then the internal circulation fan unit of the first heat dissipation device is started, otherwise the internal circulation fan unit of the second heat dissipation device is started; after the internal circulation fan unit is started, the control device starts the ambient temperature analysis program. If T Out <T In Then the internal circulation fan unit is turned off to end the temperature control cycle, otherwise it will enter the fixed value judgment program;

[0016] The fault information feedback module of the control device determines the overheating fault or fan fault of the intelligent distribution terminal based on the collected temperature signal and current signal and transmits it to the background.

[0017] Furthermore, the first heat sink is arranged on the side of the cabinet facing away from solar radiation, and the second heat sink is arranged on the side of the cabinet facing solar radiation. The decision on which heat sink to start is made based on the real-time temperature control of each heat sink, and the change factor of the solar radiation angle can be fully utilized to preferentially start the heat sink facing away from solar radiation; the two heat sinks are operated alternately, effectively avoiding backup protection in case of heat sink failure.

[0018] The control principle of the controller provided by the present invention is as follows: when the temperature control cycle starts, the sensor (denoted as T In ), external ambient temperature sensor (denoted as T Out ), the sensor of the heat dissipation device (denoted as T S1 and T S2) transmits the temperature signal to the controller. When the internal ambient temperature sensor indicates a value exceeding 40°C and the external ambient temperature sensor indicates a value lower than the internal ambient temperature, the fixed value judgment program is triggered, otherwise the temperature control cycle ends. After the fixed value judgment program is started, the controller performs a logical judgment on the received heat sink temperature sensor value. When T S1 <40℃, the fan unit switching judgment program is triggered, otherwise the temperature control cycle ends; after the fan unit switching judgment program is started, the controller re-judges the received heat sink temperature sensor indication. If T S1 ≤T S2 Then start fan group 1, otherwise start fan group 2; after the fan starts, the controller starts the ambient temperature analysis program. If T Out <T In If the temperature is too low, the fan unit will be turned off and the temperature control cycle will be ended. Otherwise, the customized judgment program will be entered.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. Independent internal and external circulation heat dissipation channels are set up, and the internal circulation forms a heat dissipation channel between the radiator and the inside of the cabinet through the fan unit, and the heat inside the cabinet is introduced into the internal circulation radiator from the top of the internal circulation radiator, and a part of the heat is taken away by conduction and external convection, and then the cooled air is discharged into the cabinet from the bottom of the internal circulation radiator; 2. The external radiator of the heat dissipation device relies on the external environment for convection heat exchange, and the fin slot wind direction cross design can meet the heat exchange requirements of different wind directions; 3. The heat dissipation device is provided with two groups, and the real-time temperature control of each group of radiators is used. The control device decides whether to start or not, and also makes full use of the change in the angle of solar radiation to give priority to starting the group of heat dissipation devices that are facing away from the solar radiation; 4. The two groups of heat dissipation devices operate alternately to effectively avoid backup protection in the event of a heat dissipation device failure; 5. The heat dissipation device and the cabinet are connected by bolts and isolated from each other by polyurethane foam sealing strips to ensure that the protection level of the cabinet is not reduced; 6. The control device realizes temperature data acquisition and processing, controls the start and stop and switching of the circulating fan unit, and feedbacks fault information, reduces the intelligent distribution terminal to reduce component failures, increases the service life of the core unit and batteries, improves environmental adaptability, and reduces operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the present invention

[0021] Figure 2 It is the installation schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the temperature control process of the present invention. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0024] like Figure 1-2 The heat dissipation device of a fully enclosed cabinet mounted on a column shown in the figure comprises an inner circulation heat dissipation fin 12 arranged in the middle of a base plate 13, an outer circulation heat dissipation fin 11 arranged at the edge of the base plate 13, an inner circulation fan unit 2 for providing airflow to the inner circulation heat dissipation fin 12, a guide valve 4 for controlling the one-way opening and closing of the airflow channel, a temperature sensor 4 for monitoring the temperature of the heat dissipation device 1 and the internal and external environment of the cabinet, and a control device 5 for controlling the start and stop of the inner circulation fan unit 2 by collecting and processing temperature data. The guide valve 3 is arranged below the inner circulation fin 12 relative to the inner circulation fan unit 2, and a sealing plate 15 surrounding the inner circulation heat dissipation fin 12 is arranged on the base plate 13 and above the inner circulation heat dissipation fin 12. The inner circulation fan unit 2, the inner circulation heat dissipation fin 12 and the guide valve 3 form an internal circulation channel, and the outer circulation heat dissipation fin 11 and the external environment exchange heat by convection to remove the heat of the internal circulation channel. The temperature sensor 4 and the control device 5 are arranged on the sealing plate 15. The external circulation heat dissipation fins 11 are provided with vertical grooves and horizontal grooves that facilitate the rapid diffusion of heat flow in different wind directions, and the internal circulation heat dissipation fins 12 are provided with vertical grooves that guide the internal circulation wind direction to the outside. The internal circulation fan unit 2 is a drawer-type structure, including a fan box 21 and an adjustable speed fan 22 built in the fan box 21. The control device 5 also includes a fault information feedback module.

[0025] A U-shaped groove is formed around the base plate 13, and a threaded hole is provided in the groove. The two sets of heat dissipation devices are threadedly connected to the cabinet through the base plate 13 through the threaded hole. The U-shaped groove is filled with a polyurethane foam seal for sealing.

[0026] like Figure 3 As shown, the heat dissipation method using the heat dissipation device of the fully enclosed cabinet installed on the column comprises the following steps:

[0027] Two sets of heat dissipation devices 1 are installed on the sunny side and the sun-proof side of the fully enclosed cabinet. After the temperature control cycle starts, the control device 5 monitors the internal ambient temperature T of the intelligent power distribution terminal cabinet through the temperature sensor 4. In , External ambient temperature T Out and the temperature T of the two heat sinks S1 With T S2 ;

[0028] When the internal ambient temperature T In Exceeding the set temperature by 40°C, the external environment temperature T Out When the temperature is lower than the internal ambient temperature indication, the fixed value judgment program is triggered, otherwise the temperature control cycle ends: the control device 5 performs logical judgment on the value collected by the temperature sensor 4. S1 When the temperature is less than 40℃, the internal circulation fan unit 2 switches to the judgment program, otherwise the temperature control cycle ends;

[0029] After the switch judgment program of the internal circulation fan unit 2 is started, the control device 5 re-judges the value collected by the temperature sensor 4. S1 ≤T S2 Then start the internal circulation fan unit of the first heat sink on the side facing away from the sun, otherwise start the internal circulation fan unit of the second heat sink on the side facing the sun; after the internal circulation fan unit is started, the control device starts the ambient temperature analysis program. If T Out <T In Then the internal circulation fan unit is turned off to end the temperature control cycle, otherwise it will enter the fixed value judgment program;

[0030] The fault information feedback module of the control device 5 determines the overheating fault or fan fault of the intelligent power distribution terminal according to the collected temperature signal and current signal and transmits it to the background.

[0031] The present invention installs heat dissipation devices on both side walls of the cabinet of products such as intelligent power distribution terminals, and sets independent internal and external circulation heat dissipation channels. The internal circulation forms a heat dissipation channel between the radiator and the cabinet through a fan unit, and the heat inside the cabinet is introduced into the internal circulation radiator from the top of the internal circulation radiator, and a part of the heat is taken away by conduction and external convection, and then the cooled air is discharged into the cabinet from the bottom of the internal circulation radiator; there are two groups of heat dissipation devices, and whether to start the heat dissipation device, that is, which group of heat dissipation devices to start, is determined according to the real-time temperature control of each group of heat dissipation devices; at the same time, the change factor of the solar radiation angle can be fully utilized, and the group of heat dissipation devices facing away from the solar radiation can be started first; the two groups of heat dissipation devices are operated alternately, effectively avoiding backup protection in the event of heat dissipation device failure. The external radiator of the heat dissipation device relies on the external environment for convection heat exchange, and the cross-wind direction design of the fin slot can meet the heat exchange requirements of different wind directions. The heat dissipation device and the cabinet are connected by bolts, and are isolated from each other by polyurethane foam sealing strips, ensuring that the protection level of the cabinet is not reduced. The controller realizes temperature data acquisition and processing, controls the start and stop and switching of the circulating fan unit, and feedbacks fault information. The method can reduce the component failure rate of products such as intelligent power distribution terminals and intelligent distribution transformer terminals, increase the service life of core units and batteries, improve environmental adaptability, and reduce operating costs.

Claims

1. A heat dissipation device for a fully enclosed cabinet mounted on a column, comprising a heat dissipation device (1) and a control device, characterized in that: The heat dissipation device (1) comprises an internal circulation heat dissipation fin (12) arranged in the middle of a base plate (13), an external circulation heat dissipation fin (11) arranged at the edge of the base plate (13), an internal circulation fan unit (2) for providing airflow to the internal circulation heat dissipation fin (12), and a guide valve (3) for controlling the one-way opening and closing of the airflow channel; the guide valve (3) is arranged below the internal circulation fin (12) relative to the internal circulation fan unit (2); the base plate (13) and the internal circulation heat dissipation fin (12) are provided with a plurality of external circulation heat dissipation fins (11) arranged at the upper side of the base plate (13). A sealing plate (15) is provided surrounding the internal circulation heat dissipation fins (12); the internal circulation fan unit (2), the internal circulation heat dissipation fins (12) and the guide valve (3) form an internal circulation channel; the external circulation heat dissipation fins (11) and the external environment conduct heat transfer to remove the heat of the internal circulation channel; the sealing plate (15) is provided with a temperature sensor (4) for monitoring the temperature of the heat dissipation device (1) and the internal and external environment of the cabinet, and a control device (5) for collecting and processing temperature data and controlling the start and stop of the internal circulation fan unit (2).

2. The heat dissipation device of a fully enclosed cabinet mounted on a column according to claim 1, characterized in that: The external circulation heat dissipation fins (11) are provided with vertical grooves and horizontal grooves which are beneficial to the rapid diffusion of heat flows in different wind directions.

3. The heat dissipation device of a fully enclosed cabinet mounted on a column according to claim 1, characterized in that: The inner circulation heat dissipation fins (12) are provided with vertical grooves for directing the inner circulation wind direction to the outside.

4. The heat dissipation device for a fully enclosed cabinet mounted on a column according to claim 1, characterized in that: The internal circulation fan unit (2) is a drawer-type structure, comprising a fan box (21) and a speed-adjustable fan (22) built into the fan box (21).

5. The heat dissipation device of a fully enclosed cabinet mounted on a column according to claim 1, characterized in that: The control device (5) also includes a fault information feedback module.

6. The heat dissipation device of a fully enclosed cabinet mounted on a column according to claim 1, characterized in that: The base plate (13) is provided with a U-shaped groove around its periphery, and a threaded hole for threaded connection with the cabinet is provided in the groove.

7. The heat dissipation device of a fully enclosed cabinet mounted on a column according to claim 6, characterized in that: The U-shaped groove of the base plate (13) is filled with a polyurethane foam sealing strip (14) for sealing.

8. A heat dissipation method using the heat dissipation device of a fully enclosed cabinet mounted on a column according to any one of claims 1 to 7, characterized in that: The steps include: Two sets of heat dissipation devices (1) are installed on the fully enclosed cabinet. After the temperature control cycle starts, the control device (5) monitors the internal ambient temperature T of the intelligent power distribution terminal cabinet through the temperature sensor (4). In , External ambient temperature T Out and the temperature T of the two heat sinks S1 With T S2 ; When the internal ambient temperature T In Exceeding the set temperature, external environment temperature T Out When the temperature is lower than the internal ambient temperature indication, the fixed value judgment program is triggered, otherwise the temperature control cycle ends: the control device (5) performs a logical judgment on the value collected by the temperature sensor (4). S1 When the temperature is lower than the set temperature, the internal circulation fan unit (2) is triggered to switch the judgment program, otherwise the temperature control cycle ends; After the internal circulation fan unit (2) switching judgment program is started, the control device (5) re-judges the value collected by the temperature sensor (4). S1 ≤T S2 Then the internal circulation fan unit of the first heat dissipation device is started, otherwise the internal circulation fan unit of the second heat dissipation device is started; after the internal circulation fan unit (2) is started, the control device (5) starts the ambient temperature analysis program, if T Out <T In The internal circulation fan unit (2) is then turned off to end the temperature control cycle, otherwise the program enters the fixed value judgment program.

9. The heat dissipation method of a fully enclosed cabinet mounted on a column according to claim 8, characterized in that: The control device (5) also includes a fault information feedback module which determines an overheating fault of the intelligent power distribution terminal or a fan fault based on the collected temperature signal and current signal and transmits the result to the backend.

10. The heat dissipation method of a fully enclosed cabinet mounted on a column according to claim 8, characterized in that: The first heat dissipation device is arranged on a side of the cabinet facing away from solar radiation, and the second heat dissipation device is arranged on a side of the cabinet facing solar radiation.

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