CN204680956U - Transformer station outdoor terminal box mini air conditioner dehydrating unit - Google Patents

Abstract

The utility model belongs to the technical field of power systems, in particular to a miniature air conditioner dehumidification device for an outdoor terminal box of a substation, comprising a casing fixed in the terminal box with an air inlet and an air outlet, the casing is fixed with a fan, a miniature A compressor, a DC motor, and a controller for controlling the working state of the DC motor and the fan, the DC motor and the fan are connected to a DC power supply; the DC motor is connected to a micro-compressor, and the micro-compressor is sequentially connected to the condenser, The capillary is connected to the evaporator to form an internal circulation; the evaporator is connected to a drain pipe, and the drain pipe is connected to the outside of the terminal box; the fan is arranged on one side of the evaporator. The utility model can control the temperature and humidity of the substation terminal box in real time, so that the terminal box does not have the conditions for condensation to prevent condensation and achieve a good dehumidification effect.

Description

Substation outdoor terminal box micro air conditioner dehumidification device

technical field

The utility model belongs to the technical field of electric power systems, in particular to a miniature air conditioner dehumidification device for an outdoor terminal box of a substation.

Background technique

The outdoor terminal box of the substation is an intermediate link between outdoor electrical equipment and indoor measurement and control, protection, communication and other equipment, and is generally installed next to the equipment. When the air is humid, especially in the rainy season, moisture and condensation in the outdoor switch terminal box will easily lead to a decrease in the insulation resistance of the DC secondary circuit to the ground. In severe cases, the insulation resistance will drop to zero, thereby forming a DC positive or negative power supply. ;If the two points of DC are grounded, it will cause the DC fuse to blow, the protection will refuse to operate or malfunction, and even damage the equipment, which seriously threatens the safe operation of the power grid; Poor contact will also cause the current loop terminals to heat up or even open, resulting in protection refusal or malfunction, causing accidents; poor contact between transformer voltage and switch, temperature signal terminals will cause abnormal operation of measurement and control, protection devices, and wrong signals, resulting in The operating personnel misjudged and made wrong analysis; in addition, when it was found that the outdoor terminal box was seriously damp, it was necessary to replace the terminal block or terminal box at a great safety risk, or even cut off the power of the equipment and circuits involved. There were also serious accidents. Hidden danger. Therefore, it is particularly important to strengthen the daily temperature and humidity control (dehumidification, moisture-proof treatment) of outdoor terminal boxes.

For the humid phenomenon of the terminal box caused by environmental factors in the outdoor terminal box of the substation, artificial heating is usually adopted, but the way of heating in the terminal box cannot effectively improve the humidity in the terminal box, and because the heater works in the terminal box for a long time , it is easy to cause the cables in the terminal box to be continuously baked for a long time, and the insulation layer is aging; even the heating temperature control switch is out of control, the heater in the terminal box keeps working, the cable insulation rubber layer falls off, and the short circuit of the cable can easily cause terrible consequences. .

Utility model content

The purpose of this utility model is to provide a miniature air-conditioning dehumidification device for the outdoor terminal box of a substation in view of the defects and deficiencies of the existing technology, which can control the temperature and humidity of the terminal box of the substation in real time, so that the terminal box does not have the conditions for condensation to occur , Play the role of preventing condensation and achieve a good dehumidification effect.

In order to achieve the above object, the utility model adopts the following technical solutions: including a casing fixed in the terminal box with an air inlet and an air outlet, the casing is fixed with a fan, a micro compressor, a DC motor, and a A controller for controlling the working state of the DC motor and the fan, both of which are connected to a DC power supply;

The DC motor is connected with the micro compressor, and the micro compressor is connected with the condenser, the capillary tube and the evaporator in turn to form an internal circulation; the evaporator is connected with a drain pipe, and the drain pipe is connected to the outside of the terminal box; the fan is arranged on one side of the evaporator side.

Optimally, the inlet of the radiating pipe of the condenser is connected with the high pressure end of the micro compressor, the outlet of the radiating pipe of the condenser is connected with the inlet of the evaporator through a capillary tube, and the outlet of the evaporator is connected with the low pressure end of the micro compressor.

Preferably, the casing is provided with casing mounting lugs for fixing the casing, and the casing mounting lugs are fixed on the inner wall of the terminal box by bolts.

Optimally, the DC power supply adopts the 24V DC power supply of the terminal box.

Optimally, the micro compressor adopts a spherical compressor.

Optimally, the DC motor adopts a miniature brushless DC motor.

Compared with the prior art, the utility model has the following beneficial technical effects: by fixing the micro-air conditioner dehumidification device in the outdoor terminal box, the micro-compressor, condenser, capillary tube and evaporator connected in sequence are fixed in the casing to form an internal Circulation, and use the fan, the outer surface of the evaporator and the outer surface of the condenser to form an outer circulation, and control the operation of the DC motor and the fan through the controller, and control the temperature and humidity of the terminal box of the substation, so that the terminal box does not have condensation. conditions, play a role in preventing condensation, to achieve a good dehumidification effect. And it can achieve a cooling capacity of 450W to 500W, an air volume of 90m ³ per hour; a dehumidification capacity of 7 to 8 liters per day, and a heating power of 50 watts.

Further, by using the 24V DC power supply of the terminal box to supply power to the fan and the DC motor, the external equipment of the air conditioner dehumidification device is reduced, and the installation and use are convenient.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Among them: 1-terminal box; 2-miniature air conditioner dehumidification device; 3-casing; 4-condenser; 5-capillary; 6-casing mounting lug; 7-evaporator; 10-controller; 11 DC motor; 12-miniature compressor.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to Fig. 1, the miniature air conditioner dehumidification device 2 of the substation outdoor terminal box provided by the utility model is installed on the inner wall of the outdoor terminal box 1 through the casing mounting lug 6 on the casing 3, and the casing mounting lug 6 is connected by bolts It is fixed on the inner wall of the terminal box 1. The casing 3 is provided with an air inlet and an air outlet; a micro compressor 12, a condenser 4, a capillary 5, an evaporator 7, a fan 9, and a controller 10 are fixed in the casing 3 of the micro air conditioner dehumidifier 2, and the controller 10 uses It is used to control the working state of the DC motor 11 and the fan 9, and is connected with the DC motor 11 and the fan 9. Adopt micro compressor 12 as the compressor of micro air conditioner dehumidifier 2. DC motor 11 and fan 9 are all connected with DC power supply; DC motor 11 is connected with micro compressor 12, and micro compressor 12 is connected with condenser 4, capillary tube 5 and evaporator 7 successively to form an internal circulation; the heat dissipation of condenser 4 The inlet of the pipe is connected with the high pressure end of the micro compressor 12, the outlet of the cooling pipe of the condenser 4 is connected with the inlet of the evaporator 7 through the capillary tube 4, and the outlet of the evaporator 7 is connected with the low pressure end of the micro compressor 12. The evaporator 7 is connected with a drain pipe 8, and the drain pipe 8 is connected to the outside of the terminal box 1, and the condensed water is connected to the outside of the terminal box 1 through the drain pipe 8; the fan 9 is arranged on one side of the evaporator 7. The DC power supply adopts the 24V DC power supply of terminal box 1. Miniature compressor 12 adopts spherical compressor. The DC motor 11 adopts a miniature brushless DC motor.

Among them, the micro-compressor 12, condenser 4, capillary tube 5, and evaporator 7 constitute the internal circulation of the air-conditioning dehumidification system; the specific process is: the micro-compressor 12 operates to compress the refrigerant circulation medium to generate high-temperature and high-pressure gas, and the high-pressure high-temperature refrigerant gas produced Enter the condenser 4, pass through the cooling tube of the condenser 4 to dissipate heat, the temperature and pressure of the circulating gas are reduced and liquefied, and then enter the evaporator 7 after being throttled by the capillary tube 5, in the evaporator 7, the gas pressure becomes smaller, and the liquefied refrigerant vaporizes , absorb a large amount of heat; the circulating medium returns to the micro compressor after evaporating and absorbing heat through the evaporator 7, and becomes a low-temperature and low-pressure gas; and so on.

Since the circulating medium throttled by the capillary tube 5 enters the evaporator 7, it changes from liquid to gas inside the evaporator 7, which needs to absorb a large amount of heat, so that the temperature of the heat dissipation aluminum sheet of the evaporator 7 drops sharply, and at the same time the evaporator 7. The temperature of the surrounding environment decreases to produce a cooling effect; since the refrigerant gas entering the condenser 4 is high-temperature and high-pressure refrigerant gas, the temperature of the surrounding environment of the condenser 4 rises through heat dissipation through the heat dissipation pipe to form a heating zone.

The fan 9, the outer surface of the evaporator 7, and the outer surface of the condenser 4 constitute the outer circulation of the air-conditioning dehumidification system; the specific process is: in the case of normal startup, through the operation of the fan 9, the humid air is sucked in from the air inlet, and evaporated The evaporator 7 and the evaporator 7 absorb the moisture in the air on the aluminum sheet and turn it into dry air, which dissipates heat through the condenser 4 and blows it out from the air outlet; after this cycle, the moisture in the air is continuously drawn out, and the extracted The water is discharged from the drain pipe 8 to the outside of the terminal box 1, and the environment inside the terminal box 1 dries quickly.

The heating and cooling of the micro-air conditioner dehumidifier 2 can be realized by changing the direction of rotation of the fan 9. When heating is required, the gas sucked by the fan 9 will be discharged through the condenser 4 for heat dissipation, and the gas will be heated and the temperature will increase; , the gas inhaled by the fan 9 is discharged through the heat-absorbing evaporator 7, and the gas is cooled and the temperature is reduced;

Conditions for starting and dehumidifying the air conditioner can be set through the controller 4, such as starting heating when the temperature is lower than minus 10 degrees Celsius, starting refrigeration when the temperature is higher than 40 degrees Celsius, and starting dehumidification when the humidity is greater than 60%.

In the utility model, adopt R600 fluorine-free environment-friendly refrigerant, the inlet of the cooling pipe of condenser 4 is connected with the high pressure end (exhaust port) of micro compressor 12, the outlet of the cooling pipe of condenser 4 is connected with the inlet of evaporator 7 Connect, capillary 5 is set at the junction of condenser 4 and evaporator 7, the inlet of evaporator 7 links to each other with the outlet of condenser 4 by capillary 5, the outlet of evaporator 7 is connected with the low-pressure end (air inlet) of micro compressor 12 Connected to form a closed-loop air conditioning dehumidification cycle system.

The miniature compressor 12 adopts the spherical compressor of the latest invention. The size of the compressor can be 30mm in diameter and less than 50mm in height. It is equipped with a miniature brushless DC motor 11. The miniature DC motor 11 is integrated with the compressor. No more than 50X50X100, this provides material effective means for the manufacture of micro air conditioner dehumidifier 1. In the utility model, the cooling capacity is 450W to 500W, the air volume is 90m ³ per hour; the dehumidification capacity is 7 to 8 liters per day, and the heating power is 50 watts.

Claims (6)

1. transformer station outdoor terminal box mini air conditioner dehydrating unit, it is characterized in that, comprise the casing (3) offering air inlet and air outlet be fixed in terminal box, described casing (3) internal fixtion has fan (9), micro-compressor (12), direct current machine (11), and for controlling the controller (10) of direct current machine (11) and fan (9) operating state, described direct current machine (11) is all connected with DC power supply with fan (9);

Described direct current machine (11) is connected with micro-compressor (12), and micro-compressor (12) is connected to form Inner eycle with condenser (4), capillary (5) and evaporator (7) successively; Evaporator (7) is connected with drainage pipe (8), and drainage pipe (8) is connected to terminal box (1) outward; Fan (9) is arranged on the side of evaporator (7).

2. transformer station outdoor terminal box mini air conditioner dehydrating unit according to claim 1, it is characterized in that, the import of the radiating tube of condenser (4) is connected with the high-pressure side of micro-compressor (12), the outlet of the radiating tube of condenser (4) is connected by the import of capillary (4) with evaporator (7), and the outlet of evaporator (7) is connected with the low-pressure end of micro-compressor (12).

3. transformer station outdoor terminal box mini air conditioner dehydrating unit according to claim 1 and 2, it is characterized in that, the casing described casing (3) is provided with for fixing casing (3) installs hanger (6), and casing is installed hanger (6) and is bolted on the inwall of terminal box (1).

4. transformer station outdoor terminal box mini air conditioner dehydrating unit according to claim 1, is characterized in that, described DC power supply adopts the 24V DC power supply of terminal box (1).

5. transformer station outdoor terminal box mini air conditioner dehydrating unit according to claim 1, is characterized in that, described micro-compressor (12) adopts spherical compressor.

6. transformer station outdoor terminal box mini air conditioner dehydrating unit according to claim 1, is characterized in that, described direct current machine (11) adopts miniature brushless direct-current motor.