CN219321910U - Forced heat dissipation device explosion-proof block terminal of function - Google Patents

Abstract

The utility model relates to the technical field of explosion-proof power distribution boxes, in particular to an explosion-proof power distribution box with a forced heat dissipation function, comprising an explosion-proof box shell for accommodating electrical components, a wiring cabinet arranged under the explosion-proof box shell, and The wiring holes on the wiring row cabinet and the legs are installed with external cooling fins on both sides of the explosion-proof box shell. There is a set between the external cooling fins and the outer wall of the explosion-proof box shell to prevent the external cooling fins from blowing to the explosion-proof box shell. The heat-insulating sheet for transferring heat to the body, in the shell of the explosion-proof box, there are a number of internal cooling fins fixed on the external cooling fins, and a semiconductor cooling sheet installed between the inner and outer cooling fins. The semiconductor cooling sheet is provided with a heat-conducting layer. In the shell of the explosion-proof box, there is a DC power supply powered by AC mains to supply power to the semiconductor refrigeration sheet, and an AC contactor controlled by a temperature controller to realize active heat dissipation, high heat dissipation efficiency, low implementation cost, and low noise. Explosion-proof distribution box.

Description

An explosion-proof distribution box with forced heat dissipation function

technical field

The utility model relates to the technical field of explosion-proof distribution boxes, in particular to an explosion-proof distribution box with the function of forced heat dissipation.

Background technique

Distribution box is assembled in closed or semiclosed metal safe by electrical wiring requirement by switchgear, measuring instrument, protective device and auxiliary equipment or on screen width, constitutes low-voltage power distribution device, and explosion-proof distribution box has explosion-proof performance. A type of distribution box, mainly explosion-proof lighting distribution box, explosion-proof power distribution box, explosion-proof anti-corrosion distribution box, etc. Explosion-proof distribution box is suitable for petrochemical equipment, oil platform, chemical industry, pharmaceutical, coal, smelting, shipbuilding , military industry, textile and other flammable and explosive places are used for power wiring. Explosion-proof distribution boxes are strictly prohibited from opening the box. When it comes to power electrical components, heat dissipation has become one of the most concerned issues for all technologies and users. The current mainstream solutions for the heat dissipation of explosion-proof boxes are as follows;

(1) Equipped with explosion-proof air conditioners for heat dissipation: this method is costly and mostly noisy;

(2) Use ventilation ducts to dissipate heat: Additional ventilation ducts are required, which has high implementation costs and has certain requirements for the site environment;

(3) Passive heat dissipation using heat sinks installed in the shell: the heat dissipation efficiency is not high, and the higher the ambient temperature on site, the lower the heat dissipation efficiency.

Contents of the invention

Aiming at the deficiencies of the existing technology, an explosion-proof distribution box with a forced heat dissipation function is provided, which realizes active heat dissipation, high heat dissipation efficiency, low implementation cost, and low noise explosion-proof distribution box.

In order to solve the above technical problems, the technical solution adopted by the utility model is an explosion-proof distribution box with forced heat dissipation function, including an explosion-proof box shell for accommodating electrical components, and a terminal block located under the explosion-proof box shell. The cabinet, the wiring holes and legs on the wiring row cabinet, the external cooling fins are installed in the openings on both sides of the explosion-proof box shell, and the external cooling fins are installed between the external cooling fins and the outer wall of the explosion-proof box shell to prevent the external cooling fins from The explosion-proof box shell is used to transfer heat. There are a number of internal heat sinks fixed on the external heat sink in the explosion-proof box shell, and a semiconductor cooling sheet installed between the inner and outer cooling fins. The semiconductor cooling sheet is equipped with The heat conduction layer is provided with a DC power supply for supplying power to the semiconductor refrigeration sheet powered by AC mains in the explosion-proof box shell, and an AC contactor controlled by a temperature controller.

In the above-mentioned explosion-proof distribution box with forced heat dissipation function, a heat insulation layer is provided between the inner wall of the explosion-proof box shell and the internal heat sink to prevent the external heat sink from transferring heat to the explosion-proof box shell.

In the above-mentioned explosion-proof distribution box with forced heat dissipation function, the heat insulation sheet is a heat insulation mica sheet.

In the above-mentioned explosion-proof distribution box with forced heat dissipation function, the heat insulation layer is heat insulation cotton.

In the above-mentioned explosion-proof distribution box with forced heat dissipation function, the heat conduction layer is a heat conduction silicone grease layer.

The above-mentioned explosion-proof distribution box with forced heat dissipation function is provided with a fan powered by a DC power supply on the internal heat sink.

The utility model has the beneficial effect of an explosion-proof power distribution box with a forced heat dissipation function: a semiconductor refrigeration sheet connecting the inner and outer heat sinks is installed inside the box to realize refrigeration, and it has the advantages of no noise, no vibration, and no refrigerant , small size, light weight and so on.

Using semiconductor refrigeration to actively increase the temperature difference between the internal heat sink temperature and the air in the box, as well as the external heat sink temperature and the ambient temperature, can greatly improve the efficiency of heat transfer compared with passive heat dissipation.

There is no need to change the sealing requirements of the traditional explosion-proof box, no need to add a channel to communicate with the outside air, and the on-site installation is relatively simple.

The opening and closing of the refrigeration system can be automatically controlled by the thermostat. After reaching a certain temperature, the refrigeration system will automatically start to refrigerate, and it will automatically shut down after falling to a suitable temperature, so as to avoid continuous operation when no refrigeration is required, realize energy saving and prolong the service life .

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model;

Fig. 3 is the rear view of the utility model;

Fig. 4 is a side view of the utility model;

Fig. 5 is a schematic diagram of the installation and cooperation of the external heat sink and the internal heat sink.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1-5, an explosion-proof distribution box with forced heat dissipation function includes an explosion-proof box shell 1 for accommodating electrical components, a wiring row cabinet 2 arranged under the explosion-proof box shell 1, and a wiring The wiring holes 13 on the row cabinet 2 and the legs 3 are equipped with external cooling fins 4 in the openings on both sides of the explosion-proof box housing 1. The external cooling fins are finned cooling fins, and the external cooling fins 4 and A heat insulating sheet 5 for preventing the external cooling fins 4 from transferring heat to the explosion-proof box casing 1 is provided between the outer walls of the explosion-proof box shell 1, and the heat insulating sheet 5 is a heat-insulating mica sheet. Inside the explosion-proof box housing 1 are provided with a number of internal cooling fins 7 fixed on the external cooling fins 4, and semiconductor cooling fins installed between the inner and outer cooling fins, the semiconductor cooling fins 8 are provided with a heat conducting layer, so The heat conduction layer is a thermally conductive silicone grease layer applied on the semiconductive refrigeration sheet 8, and a DC power supply 9 for supplying power to the semiconductive refrigeration sheet 8 powered by AC mains power is provided in the explosion-proof box housing 1, and a temperature controller 10 controlled AC contactor 11. Through the thermo-electric effect of the semiconductive refrigeration plate 19 after being energized, the temperature on one side is lowered and the temperature on the other side is increased, so as to realize the transmission and conversion of heat from the inside to the outside.

A heat insulating layer 6 for preventing the external heat sink 4 from transferring heat into the explosion-proof box shell is provided between the inner wall of the explosion-proof box shell and the internal heat sink 7 . The heat insulation layer 6 is heat insulation cotton, which is arranged on the inner wall of the explosion-proof box shell.

A box door 14 hinged with the explosion-proof box shell 1 is provided on the explosion-proof box shell 1 , and a box door handle 15 is provided on the box door 14 .

A fan 12 powered by a DC power supply 9 is provided on the internal cooling fin 7 . Air velocity can be increased for faster heat dissipation and cooling efficiency.

The working process of the refrigeration system of the explosion-proof distribution box with forced heat dissipation function of the utility model is as follows:

First set the appropriate working temperature of the refrigeration system, for example, set it to 35 degrees Celsius, then when the temperature in the explosion-proof box reaches the temperature, the normally open contact of the thermostat will close, and the AC contactor connected to it will be closed, and the DC power supply will be energized , the semiconductor refrigeration sheet and fan connected to the DC power supply start to work. When the temperature drops below 35 degrees Celsius, the normally open contact of the thermostat is disconnected, the AC contactor is disconnected, and the DC power supply is cut off. The semiconductor powered by the DC power supply The cooling fins and fans lose power and stop working. When the temperature rises above 35 degrees Celsius again, they will work again according to the above process. It has been proved by experiments that when the cooling system is operated at room temperature, the temperature of the internal cooling fins can drop within 1 minute. After the temperature stabilizes, the temperature of the external heat sink can reach 55 to 60 degrees Celsius, and the temperature of the internal heat sink can reach 10 to 15 degrees Celsius.

In summary, the utility model realizes an explosion-proof distribution box with forced heat dissipation function, which effectively improves the heat dissipation efficiency and realizes automatic temperature control. At the same time, the cost is relatively low, and the production and processing technical requirements are low. It can be modified and installed on its own basis, and has a wide range of applications.

Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples, and the changes, modifications, additions or replacements made by those of ordinary skill in the art within the essential scope of the present utility model, It should also belong to the protection scope of the present utility model.

Claims (6)

1. An explosion-proof distribution box with a forced heat dissipation function, comprising an explosion-proof box housing for accommodating electrical components, a wiring row cabinet arranged under the explosion-proof box casing, a wiring hole arranged on the wiring row cabinet, and legs , it is characterized in that: external cooling fins are installed on both sides of the explosion-proof box shell, and a heat shield for preventing the external cooling fins from transferring heat to the explosion-proof box shell is provided between the external cooling fins and the outer wall of the explosion-proof box shell , in the explosion-proof box shell, there are a number of internal heat sinks fixed on the external heat sinks, and semiconductor cooling fins installed between the inner and outer cooling fins. A DC power supply powered by the AC mains for powering the semi-conductor cooling sheets, and an AC contactor controlled by a thermostat. 2. The explosion-proof distribution box with forced heat dissipation function according to claim 1, characterized in that, between the explosion-proof box shell inner wall and the internal heat sink, there is a device for preventing the external heat sink from transferring heat to the explosion-proof box shell. heat insulation. 3. The explosion-proof distribution box with forced heat dissipation function according to claim 2, characterized in that, the heat insulation sheet is a heat insulation mica sheet. 4. The explosion-proof distribution box with forced heat dissipation function according to claim 3, characterized in that, the heat insulation layer is heat insulation cotton. 5. The explosion-proof distribution box with forced heat dissipation function according to claim 4, characterized in that, the heat conduction layer is a heat conduction silicone grease layer. 6. The explosion-proof power distribution box with forced heat dissipation function according to claim 5, characterized in that a fan powered by a DC power supply is provided on the internal heat sink.

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