Precise air supply device

Abstract

The utility model belongs to the technical field of power transmission and transformation project supporting facilities, and particularly provides a precise air supply device which comprises a ventilation air conditioner indoor unit, a ventilation air conditioner outdoor unit, a static pressure box, an air return opening, a flexible air pipe, a refrigerant pipe and a condensation pipe. The precise air supply system can realize uniform air flow distribution and efficient heat dissipation in the GIS cabinet, so that the heat dissipation efficiency of the equipment is improved. Through reasonable arrangement of the air supply outlets and accurate control of the air supply amount, air flow accumulation and uneven temperature can be avoided, and the risks of heat accumulation and temperature rise of equipment are reduced. Meanwhile, the precise air supply system can further improve the reliability of equipment, reduce the probability of occurrence of equipment faults and improve the stability and reliability of a power system. Through collection and analysis of operation data, it can be found that in equipment using the precise air supply system, the fault occurrence rate is lower than that of equipment in a traditional air supply mode, and the service life of the equipment is longer.

Description

Technical Field

[0001] The utility model belongs to the technical field of supporting facilities for power transmission and transformation projects, and specifically provides a precise air supply device. Background Art

[0002] As a core component of the power system, the substation bears the important responsibility of transforming and transmitting electric energy. In the substation, the GIS (gas insulated switch) cabinet, as a key equipment, plays a key role in connecting, disconnecting and protecting the circuit. However, due to factors such as the small internal space of the GIS cabinet and limited airflow, problems such as uneven equipment temperature, heat accumulation and shortened equipment life will occur, thus affecting the stable operation of the substation and the reliability of the equipment. In order to solve the problem of uneven temperature in the GIS cabinet and improve the operating reliability of the equipment, precision air supply technology came into being. This technology optimizes the airflow distribution in the GIS cabinet and improves the temperature distribution of the equipment to improve the operating reliability and service life of the equipment. The traditional cooling and heat dissipation method is to reduce the operating temperature of the equipment by changing the overall temperature of the equipment room. Precision air supply technology is a new type of control method, and its application in the power system is of great significance. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides a precise air supply device for supplying air and cooling the inside of a GIS gas insulated switch cabinet in a substation, comprising a ventilation and air conditioning indoor unit 1, a ventilation and air conditioning outdoor unit 2, a static pressure box 3, a soft air duct 5, a refrigerant pipe 6 and a condenser pipe 7;

[0004] The ventilation and air conditioning indoor unit 1 is hoisted and arranged on the top of the substation room. One side of the ventilation and air conditioning indoor unit 1 is connected to a static pressure box 3, and one side of the static pressure box 3 is connected to a soft air duct 5. The lower end of the soft air duct 5 passes through the cabinet top cover and passes into the interior of the cabinet;

[0005] The condensation pipe 7 has one end connected to the ventilation and air conditioning indoor unit 1, and the other end is a free end, which passes through a reserved hole in the wall of the power station and extends to the outside; the condensed water generated when the air conditioner is working is discharged from the condensation pipe 7 to the outdoor roof or other drainable places;

[0006] The ventilation and air conditioning outdoor unit 2 is arranged outside the substation; the ventilation and air conditioning indoor unit 1 and the ventilation and air conditioning outdoor unit 2 are connected by a refrigerant pipe 6.

[0007] Furthermore, an air volume regulating valve 8 is provided at the end of the flexible air duct 5 .

[0008] Furthermore, a return air port 4 is provided at the lower end of the ventilation and air conditioning indoor unit 1, and the return air port 4 meets the ventilation demand in the substation.

[0009] Furthermore, two flexible air ducts 5 may be led out from the static pressure box 3, and each flexible air duct 5 supplies air to one cabinet.

[0010] The precision air supply system can achieve uniform airflow distribution and efficient heat dissipation in the GIS cabinet, thereby improving the heat dissipation efficiency of the equipment. Through the reasonable arrangement of air outlets and precise control of air supply volume, airflow accumulation and uneven temperature can be avoided, and the risk of heat accumulation and temperature rise in the equipment can be reduced. At the same time, the precision air supply system can also improve the reliability of equipment, reduce the probability of equipment failure, and improve the stability and reliability of the power system. Through the collection and analysis of operating data, it can be found that in equipment using the precision air supply system, the failure rate is lower than that of equipment using traditional air supply methods, and the equipment life is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional installation schematic diagram of the utility model;

[0012] Figure 2 It is a top view of the working of the utility model.

[0013] Among them, there are a ventilation and air conditioning indoor unit 1, a ventilation and air conditioning outdoor unit 2, a static pressure box 3, a return air outlet 4, a soft air duct 5, a refrigerant pipe 6, a condensing pipe 7, an air volume regulating valve 8, and a cabinet 9. DETAILED DESCRIPTION

[0014] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0015] refer to Figure 1-2 The present invention provides a precise air supply device for supplying air and cooling the inside of a GIS gas insulated switch cabinet 9 in a substation, comprising a ventilation and air conditioning indoor unit 1, a ventilation and air conditioning outdoor unit 2, a static pressure box 3, a soft air duct 5, a refrigerant pipe 6 and a condenser pipe 7;

[0016] The ventilation and air conditioning indoor unit 1 is hoisted and arranged on the top of the substation room. One side of the ventilation and air conditioning indoor unit 1 is connected to a static pressure box 3, and one side of the static pressure box 3 is connected to a soft air duct 5. The lower end of the soft air duct 5 passes through the cabinet top cover and passes into the interior of the cabinet;

[0017] The condensation pipe 7 has one end connected to the ventilation and air conditioning indoor unit 1, and the other end is a free end, which passes through a reserved hole in the wall of the power station and extends to the outside; the condensed water generated when the air conditioner is working is discharged from the condensation pipe 7 to the outdoor roof or other drainable places;

[0018] The ventilation and air conditioning outdoor unit 2 is arranged outside the substation; the ventilation and air conditioning indoor unit 1 and the ventilation and air conditioning outdoor unit 2 are connected by a refrigerant pipe 6.

[0019] As an improvement to the solution, an air volume regulating valve 8 is provided at the end of the soft air duct 5 to adjust the air volume to control the temperature.

[0020] As an improvement of the solution, a return air outlet 4 is provided at the lower end of the ventilation and air conditioning indoor unit 1, and the return air outlet 4 meets the air exchange demand in the substation.

[0021] As an improvement of the solution, two soft air ducts 5 can be led out from the static pressure box 3, and each soft air duct 5 supplies air to a corresponding cabinet.

[0022] The utility model is placed in the GIS room of the substation to provide precise air supply for the control cabinet. In summer, when the indoor temperature is 2 degrees Celsius higher than the set temperature and lasts for 5 minutes, the exhaust fan is started; when the indoor temperature is 2 degrees Celsius higher than the set temperature and lasts for 30 minutes, the exhaust fan is stopped and the cabinet air conditioner is started for cooling (the internal start command, set temperature and control logic of the cabinet air conditioner need to be set by the cabinet air conditioner itself); when the indoor temperature is 2 degrees Celsius lower than the set temperature and lasts for 5 minutes, the exhaust fan is stopped and the cabinet air conditioner is stopped for cooling; (the internal stop command, set temperature and control logic of the cabinet air conditioner need to be set by the cabinet air conditioner itself); in winter, when the indoor temperature is 2 degrees Celsius lower than the set temperature and lasts for 5 minutes, the cabinet air conditioner is started for heating (the internal start command, set temperature and control logic of the cabinet air conditioner need to be set by the cabinet air conditioner itself); when the indoor temperature is 2 degrees Celsius higher than the set temperature and lasts for 5 minutes, the cabinet air conditioner is stopped for heating (the internal stop command, set temperature and control logic of the cabinet air conditioner need to be set by the cabinet air conditioner itself).

[0023] The utility model adopts a multi-connected duct unit. The outdoor unit is installed on the roof of the power distribution device room, the indoor unit is installed in the GIS room, and a static pressure box is set at the outlet of the indoor unit. The diameter air outlet is connected to the reserved air duct hole on the top of the distribution box with a soft air duct. The air conditioning cold source is provided by the outdoor unit of the air-cooled variable refrigerant flow multi-split unit. According to the specific project conditions, the outdoor unit can be installed on the outdoor equipment platform. The outdoor unit without an outdoor equipment platform is installed in a well-ventilated location outdoors or in the basement, and must be installed on a special steel structure bracket.

[0024] The indoor air supply duct is mainly made of insulated soft duct, the indoor unit return duct is made of galvanized steel plate duct, and the ventilation system duct is equipped with fire dampers at the places where it passes through the firewall and deformation joint. The wall thickness of the duct between the fire damper and the firewall and deformation joint is 2 mm. When the duct passes through the fireproof and explosion-proof wall or floor that needs to be closed, a steel protective sleeve with a thickness of not less than 1.6 mm must be installed; the duct and the protective sleeve should be tightly sealed with non-flammable and harmless flexible materials. The duct is connected by flanges, and the flange gasket is made of closed-cell sponge or rubber sheet; for the duct used for exhaust and smoke exhaust, the flange gasket is made of non-flammable fiberglass products or other non-flammable materials; the thickness is 5 mm. Composite aluminum foil flexible fiberglass hose should be used at the connection between the duct and the inlet and outlet of the air conditioner and the inlet and outlet of the exhaust fan. When it is set on the negative pressure side, the length is 100 mm, and when it is set on the positive pressure side, the length is 150 mm. The flexible short pipe of the smoke exhaust system should be made of non-combustible materials, and should ensure that it can work continuously for more than 30 minutes at 280℃. Use non-combustible A1 grade titanium silicate fireproof soft air duct. The air conditioning condensate pipe uses UPVC pipe. Use flame-retardant B1 grade rubber and plastic insulation material for insulation, and the insulation thickness is 15mm. The refrigerant pipe uses copper pipe and is welded. The refrigerant pipe is insulated with flame-retardant B1 grade rubber and plastic insulation material. The insulation thickness is 20mm for pipe diameter ≤12.7mm; the insulation thickness is 25mm for pipe diameter>12.7mm; the air conditioner is insulated with flame-retardant B1 grade rubber and plastic insulation material, and a maintenance port is reserved at the bottom of the indoor unit in the ceiling.

[0025] The precision air supply system can achieve uniform airflow distribution and efficient heat dissipation in the GIS cabinet, thereby improving the heat dissipation efficiency of the equipment. Through the reasonable arrangement of air outlets and precise control of air supply volume, the accumulation of airflow and uneven temperature can be avoided, and the risk of heat accumulation and temperature rise of the equipment can be reduced. Studies have shown that the precision air supply system has a significant effect on the heat dissipation of equipment. Through the application of the precision air supply system, the operating temperature of the equipment can be reduced, thermal stress can be reduced, and the service life of the equipment can be extended. At the same time, the precision air supply system can also improve the reliability of the equipment, reduce the probability of equipment failure, and improve the stability and reliability of the power system.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A precise air supply device, used for supplying air and cooling the interior of a GIS gas insulated switch cabinet in a substation, characterized in that: include, A ventilation and air conditioning indoor unit (1), a ventilation and air conditioning outdoor unit (2), a static pressure box (3), a flexible air duct (5), a refrigerant pipe (6) and a condenser pipe (7); A ventilation and air conditioning indoor unit (1) is hoisted and arranged on the top of the substation room, one side of the ventilation and air conditioning indoor unit (1) is connected to a static pressure box (3), one side of the static pressure box (3) is connected to a soft air duct (5), the lower end of the soft air duct (5) passes through the cabinet top cover and passes into the interior of the cabinet; The condenser pipe (7) has one end connected to the indoor unit of the ventilation and air conditioning (1) and the other end is a free end, which passes through a reserved hole provided in the wall of the power station and extends to the outside; condensed water generated when the air conditioner is working is discharged from the condenser pipe (7) to the outdoor roof or other drainable place; The ventilation and air conditioning outdoor unit (2) is arranged outside the substation; the ventilation and air conditioning indoor unit (1) and the ventilation and air conditioning outdoor unit (2) are connected by a refrigerant pipe (6).

2. A precise air supply device according to claim 1, characterized in that: An air volume regulating valve (8) is provided at the end of the flexible air duct (5).

3. A precise air supply device according to claim 1, characterized in that: An air return port (4) is provided at the lower end of the ventilation and air conditioning indoor unit (1).

4. A precise air supply device according to claim 1, characterized in that: Two soft air ducts (5) can be led out from the static pressure box (3), and each soft air duct (5) supplies air to a corresponding cabinet.

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