CN115275805A - Power distribution cabinet convenient for heat dissipation - Google Patents
Power distribution cabinet convenient for heat dissipation Download PDFInfo
- Publication number
- CN115275805A CN115275805A CN202210950753.3A CN202210950753A CN115275805A CN 115275805 A CN115275805 A CN 115275805A CN 202210950753 A CN202210950753 A CN 202210950753A CN 115275805 A CN115275805 A CN 115275805A
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- Prior art keywords
- pipe
- air
- cabinet body
- cabinet
- heat dissipation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a power distribution cabinet convenient for heat dissipation, which comprises a cabinet body, wherein the side wall of the cabinet body is provided with an exhaust device, the exhaust device comprises a cooling device arranged underground, the cooling device is embedded into soil, the cooling device is connected with an air suction pipe for sucking outside air into the cooling device and an air inlet pipe for discharging cold air in the cooling device into the cabinet body, the exhaust device discharges hot air in the cabinet body out of the cabinet body, and the bottom of the cabinet body is fixed on the ground through a bottom plate. Utilize underground temperature to be less than the characteristics of temperature on the ground, it is internal to carry out the back input cabinet that cools down to the air through being located underground heat sink, and the radiating effect of realization cooling is taken away the internal hot-blast of cabinet with the flowing of the internal wind current of cabinet to rethread exhaust device, has solved summer because of the higher difficult problem that leads to the heat dissipation of the external air temperature of cabinet, has ensured the safe in utilization of switch board.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a power distribution cabinet convenient for heat dissipation.
Background
The distribution cabinet (case) is a final-stage device of a distribution system and is divided into a power distribution cabinet (case), a lighting distribution cabinet (case) and a metering cabinet (case). The power distribution cabinet is a general name of a motor control center.
The power distribution cabinet is power equipment for connecting a power grid with a user, and electric elements such as a circuit breaker, a vacuum switch and a voltmeter are arranged in the power distribution cabinet. The electric elements in the switch board can produce a large amount of heats in connecting in the circuit, especially in hot summer, and the temperature is higher in the switch board, influences electric elements's normal work, still can cause the conflagration when serious.
Through set up the fan in the switch board among the prior art, realize the cooling to the switch board inside. But because the outside air temperature of the power distribution cabinet is also higher in hot summer, the cooling effect is not ideal.
Disclosure of Invention
The invention aims at the defects in the prior art, and provides the power distribution cabinet convenient for heat dissipation, which utilizes the characteristic that the underground temperature is lower than the above-ground temperature, cools the air by the cooling device positioned underground and then inputs the cooled air into the cabinet body, and then realizes the flowing of the air current in the cabinet body by the exhaust device to take away the hot air in the cabinet body, thereby realizing the effects of cooling and heat dissipation, solving the problem of difficult heat dissipation caused by higher air temperature outside the cabinet body in summer, and ensuring the use safety of the power distribution cabinet.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a switch board convenient to heat dissipation, includes the cabinet body, the lateral wall of the cabinet body is equipped with exhaust device, including setting up at secret heat sink, in the heat sink buries soil, be connected with on the heat sink with the outside air suction pipe of inhaling the heat sink and with the air-supply line of discharging the internal cold air of heat sink into the cabinet, exhaust device is with the internal hot-blast discharge cabinet body of cabinet, and the bottom of the cabinet body is fixed subaerial through the bottom plate.
Preferably, the heat sink includes water tank and cold air room, the cold air room is enclosed construction, and the outside cover of cold air room has the water tank, is equipped with cold water in the water tank, cold water is rainwater or running water, the upper end of water tank is equipped with the case lid, the upper end of case lid is equipped with the water catch bowl, be equipped with the hole that leaks in the water catch bowl, the upper end of case lid is connected with the moisturizing pipe, the upper end of moisturizing pipe is located more than ground, and the upper end of moisturizing pipe is equipped with the stopcock, and the lower extreme of moisturizing pipe is close to the bottom of water tank, is equipped with radiating fin on the lateral wall of water tank, the upper end of cold air room is equipped with the blast pipe of being connected with the air-supply line.
Preferably, the air suction pipe is located in the water tank, the air inlet end of the air suction pipe penetrates through the side wall of the water tank and is located above the ground, the air outlet end of the air suction pipe is communicated with the cold air chamber, a dust filter screen is arranged in the cold air chamber, and the air outlet of the air suction pipe is located below the dust filter screen.
Preferably, the air inlet end of the air suction pipe is provided with a supporting rod, the upper end of the supporting rod is provided with filter cotton, and the periphery of the filter cotton is fixed through a compression ring in threaded connection with the air inlet pipe.
Preferably, the side wall of the part of the air suction pipe below the ground is connected with a heat exchange pipe, one end of the heat exchange pipe is of a closed structure, and the other end of the heat exchange pipe is communicated with the air suction pipe.
Preferably, the upper end of bottom plate is equipped with the base of the fixed cabinet body, and the lower extreme of bottom plate is equipped with the backup pad that is located underground, the lower extreme of backup pad is connected with the clamp plate.
Preferably, the air outlet of the air inlet pipe is provided with a net cover, and the air inlet pipes are connected with the bottom and the side wall of the cabinet body respectively.
Preferably, exhaust device includes fan and exhaust pipe, the exhaust pipe is connected with the upper portion of cabinet side wall, and the one end of exhaust pipe is connected with the cover that induced drafts of loudspeaker form, and it is internal that the cover that induced drafts is located the cabinet, and the other end of exhaust pipe is connected with opening exhaust pipe down, the exhaust pipe is located the outside of the cabinet body, the fan is the formula of induced drafting, and the fan is located the exhaust pipe.
Preferably, a blocking net is arranged in the air suction hood, and an air deflector is arranged at the joint of the exhaust pipe and the exhaust pipe.
Preferably, the exhaust pipe is communicated with the suction pipe through a return pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, by utilizing the characteristic that the underground temperature is lower than the above-ground temperature, air is cooled by the cooling device positioned underground and then is input into the cabinet body, and then the air flow in the cabinet body is realized by the air exhaust device to take away hot air in the cabinet body, so that the effects of cooling and radiating are realized, the problem of difficult radiating caused by high air temperature outside the cabinet body in summer is solved, and the use safety of the power distribution cabinet is ensured.
2. The cooling device of the invention exchanges heat with the water tank by utilizing the characteristic of low underground temperature, so that the water in the water tank is always kept in a low-temperature state, the water temperature in the water well is as low as the water temperature, the ground is utilized to absorb heat and exchange heat, and the air exchanges heat and cools in the air conditioning chamber, so that the air temperature is greatly reduced, and the interior of the cabinet body can be effectively cooled.
3. According to the invention, the water leakage hole and the water replenishing pipe are arranged on the tank cover of the water tank, when rainwater is more, water flow in the water tank can be replenished through the rainwater, so that self-water replenishing is realized, when the water tank is dry, water can be replenished into the water tank through the water replenishing pipe, in addition, in winter, the water in the water tank can be pumped out through the water replenishing pipe, and the water tank is prevented from being damaged due to icing.
4. The side wall of the air suction pipe is provided with the heat exchange pipe, so that the heat exchange area is increased, and the heat exchange speed and the cooling effect are improved.
5. According to the invention, the suction pipe and the exhaust device are connected through the return pipe to form a loop, so that the air flow can be always kept at a lower temperature, and the problem of low cooling speed caused by the need of cooling the outside air every time can be avoided; because of adopting the closed cycle type, a loop is formed between the cooling device and the cabinet body, the entering of external dust can be avoided, and the cleanliness of the interior of the cabinet body is ensured.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural view of the portion of the air suction pipe above the ground;
FIG. 3 is a schematic structural view of a portion of the suction duct below the ground;
FIG. 4 is a schematic view of the structure of the air discharging device;
FIG. 5 is a schematic structural view of a cooling device;
FIG. 6 is a cross-sectional view of a cooling device;
FIG. 7 is a schematic view of the structure of the air inlet duct;
fig. 8 is a schematic structural diagram of a second embodiment of the present invention.
In the figure: 1-a protective cover; 2-an air suction pipe; 201-a pressure ring; 202-filter cotton; 203-support rods; 204-heat exchange tube; 3-a cooling device; 301-heat dissipating fins; 302-a water tank; 303-box cover; 304-a water collection tank; 305-water leakage hole; 306-cold air chamber; 307-exhaust pipe; 308-cold water; 309-dust filter screen; 310-a water replenishing pipe; 311-pipe plug; 4-a bottom plate; 401-a support plate; 402-a platen; 403-a base; 5-an air inlet pipe; 501-a mesh cover; 6-an air exhaust device; 601-an air suction hood; 602-a fan; 603-air deflectors; 604-an exhaust pipe; 605-a barrier net; 606-an exhaust pipe; 7-a cabinet body; 8-return pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, a switch board convenient to heat dissipation, including the cabinet body 7, the bottom of the cabinet body 7 is fixed subaerial through bottom plate 4, and the upper end of bottom plate 4 is equipped with the base 403 of the fixed cabinet body 7, and base 403 adopts the rectangle space frame structure, makes the bottom of the cabinet body 7 unsettled, and the ventilation of being convenient for, the lower extreme of bottom plate 4 are equipped with the backup pad 401 that is located underground, and the lower extreme of backup pad 401 is connected with clamp plate 402, increases fixed stability.
No heat dissipation holes are formed in the side wall of the cabinet body 7, the cabinet body 7 is of a closed structure, an exhaust device 6 is arranged on the side wall of the cabinet body 7, the exhaust device 6 mainly discharges hot air in the cabinet body 7 out of the cabinet body 7, negative pressure is formed in the cabinet body 7, a cooling device 3 is arranged underground, the cooling device 3 is directly buried in soil, the depth of the exhaust device 6 is not smaller than 1m, the deeper the depth is, the lower the underground temperature is, and heat dissipation is facilitated, in the embodiment, the exhaust pipe is arranged at the position of 2m underground, the cooling device 3 is connected with an exhaust pipe 2 for sucking outside air into the cooling device 3, and an air inlet pipe 5 for discharging cold air in the cooling device 3 into the cabinet body 7, the outside air enters the cooling device 3 through the exhaust pipe 2 and then is cooled, the air cooled by the cooling device 3 becomes cold air in the application, the air after being cooled by the cooling device 3, the exhaust device 6 forms negative pressure in the cabinet body 7, and under the action of the negative pressure, the cold air flows into the cabinet body 7 through the air inlet pipe 5 to perform heat exchange and cool air.
As shown in fig. 5-6, the cooling device 3 includes a water tank 302 and a cold air chamber 306, the cold air chamber 306 is a closed structure, the water tank 302 is sleeved outside the cold air chamber 306, cold water 308 is filled in the water tank 302, in this application, the cold water 308 adopts rainwater or tap water, the upper end of the water tank 302 is provided with a tank cover 303, the upper end of the tank cover 303 is provided with a water collecting tank 304, a water leaking hole 305 is arranged in the water collecting tank 304, rainwater is collected through the water collecting tank 304, the rainwater leaking hole 305 flows into the water tank 302, self-replenishment of water flow in the water tank 302 is realized through rainwater, the upper end of the tank cover 303 is connected with a water replenishing pipe 310, the upper end of the water replenishing pipe 310 is located above the ground, the upper end of the water replenishing pipe 310 is provided with a pipe plug 311, the lower end of the water replenishing pipe 310 is close to the bottom of the water tank 302, when the water tank 302 is replenished without precipitation when drought in summer, tap water is replenished to the water tank 302, when in winter, water is replenished through the water replenishing pipe 310, water in the water tank 302 is pumped out, the volume is less than half of the water in the water tank 302, thus, the water tank 302 is prevented from being frozen, the water tank 302 is provided with an outer side wall 301, the heat dissipation fin 301 is provided on the outer wall of the cold air pipe 307, and connected with the cold air exhaust pipe for heat dissipation, the cold air dissipation chamber, the cold air pipe 5, the cold air pipe 301.
The number of the air inlet pipes 5 is multiple, and the air inlet pipes are respectively connected with the bottom and the side wall of the cabinet body 7, as shown in fig. 7, a net cover 501 is arranged at an air outlet of each air inlet pipe 5, so that smooth air outlet is ensured, and sundries can be prevented from entering, because the air inlet pipes 5 connected with the bottom of the cabinet body 7 are prevented from falling into objects such as wire ends and screws to cause pipeline blockage.
The air suction pipe 2 is positioned in the water tank 302 and wound outside the cold air chamber 306, the air inlet end of the air suction pipe 2 penetrates through the side wall of the water tank 302 and is positioned above the ground, the air outlet end of the air suction pipe 2 is communicated with the cold air chamber 306, a dust filter net 309 is arranged in the cold air chamber 306, the air outlet of the air suction pipe 2 is positioned below the dust filter net 309, as shown in fig. 2, a support rod 203 is transversely arranged in the pipe orifice of the air inlet end of the air suction pipe 2, filter cotton 202 is arranged at the upper end of the support rod 203, the periphery of the filter cotton 202 is fixed through a press ring 201 in threaded connection with the air inlet pipe 5, dust is subjected to double filtration through the filter cotton 202 and the dust filter net 309, dust is prevented from blowing into the cabinet body 7, and a dustproof effect is achieved.
In order to accelerate the cooling speed, as shown in fig. 3, the side wall of the part of the air suction pipe 2 below the ground is connected with a heat exchange pipe 204, one end of the heat exchange pipe 204 is a closed structure, the other end of the heat exchange pipe 204 is communicated with the air suction pipe 2, the contact area between the air suction pipe 2 and the soil and cold water 308 can be increased through the heat exchange pipe 204, the heat exchange area is increased, and the cooling effect is increased.
In the present application, as shown in fig. 4, the exhaust device 6 includes a fan 602 and an exhaust duct 604, the exhaust duct 604 is connected with the upper portion of the side wall of the cabinet 7, one end of the exhaust duct 604 is connected with a horn-shaped suction hood 601, the suction area is increased, the suction hood 601 is located in the cabinet 7, the other end of the exhaust duct 604 is connected with an exhaust duct 604 with a downward opening, the downward opening can prevent rainwater from entering, the exhaust duct 604 is located on the outer side of the cabinet 7, the fan 602 is of an air-draft type, the fan 602 is located in the exhaust duct 604, hot air in the cabinet 7 is drawn out through the fan 602, and the flow of air in the cabinet 7 is realized.
The air draft cover 601 is internally provided with a blocking net 605 to prevent foreign objects from entering the air draft cover 601 and prevent the foreign objects from touching the fan 602, so that a safety effect is achieved, the connecting part of the exhaust duct 604 and the exhaust duct 606 is provided with an air deflector 603, and the air deflector 603 can guide air flow into the exhaust duct 604 to promote the air flow to flow.
Under the promotion of exhaust device 6, will carry out the heat transfer in the continuous injection cabinet body 7 of air after the cooling of heat sink 3 to realize the heat dissipation of switch board, ensured safe in utilization.
In the second embodiment, the first embodiment of the method,
as shown in fig. 8, on the basis of the first embodiment, the protective cover 1 and the filter cotton 202 at the upper end of the air suction pipe 2 are removed, and the exhaust pipe 604 and the air suction pipe 2 are communicated through the return pipe 8 to form a loop, so that the air in the cabinet 7 can be circularly cooled to achieve the heat dissipation effect. This embodiment has the advantages of:
when the temperature in the cabinet body 7 is lower than the outdoor temperature, the air exhausted from the cabinet body 7 directly flows back into the cooling device 3 due to the temperature lower than that of the outdoor air, and is continuously used, so that the air can be always kept at a lower temperature.
In addition, because of the adoption of a closed circulation type, a loop is formed between the cooling device 3 and the cabinet body 7, the entering of external dust can be avoided, and the cleanliness in the cabinet body 7 is ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a switch board convenient to heat dissipation, includes the cabinet body, the lateral wall of the cabinet body is equipped with exhaust device, its characterized in that: including setting up at the underground heat sink, in the heat sink buries soil, be connected with on the heat sink with the inlet scoop that the external air inhaled the heat sink and with the internal air-supply line of discharging the cold air of heat sink into the cabinet, the internal hot-blast discharge cabinet body of cabinet is fixed subaerial through the bottom plate to exhaust device, the bottom of the cabinet body.
2. The power distribution cabinet convenient for heat dissipation of claim 1, wherein: the cooling device comprises a water tank and a cold air chamber, the cold air chamber is of a closed structure, the outer side of the cold air chamber is sleeved with the water tank, cold water is filled in the water tank and is rainwater or tap water, a tank cover is arranged at the upper end of the water tank, a water collecting tank is arranged at the upper end of the tank cover, a water leakage hole is formed in the water collecting tank, a water replenishing pipe is connected to the upper end of the tank cover, the upper end of the water replenishing pipe is located above the ground, a pipe plug is arranged at the upper end of the water replenishing pipe, the lower end of the water replenishing pipe is close to the bottom of the water tank, heat radiating fins are arranged on the outer side wall of the water tank, and an exhaust pipe connected with an air inlet pipe is arranged at the upper end of the cold air chamber.
3. The power distribution cabinet convenient for heat dissipation of claim 2, wherein: the air suction pipe is positioned in the water tank, the air inlet end of the air suction pipe penetrates through the side wall of the water tank and is positioned above the ground, the air outlet end of the air suction pipe is communicated with the cold air chamber, a dust filter screen is arranged in the cold air chamber, and the air outlet of the air suction pipe is positioned below the dust filter screen.
4. The power distribution cabinet convenient for heat dissipation of claim 2, wherein: the air inlet end of the air suction pipe is provided with a supporting rod, the upper end of the supporting rod is provided with filter cotton, and the periphery of the filter cotton is fixed through a compression ring in threaded connection with the air inlet pipe.
5. The power distribution cabinet convenient for heat dissipation of claim 2, wherein: the side wall of the part, below the ground, of the air suction pipe is connected with a heat exchange pipe, one end of the heat exchange pipe is of a closed structure, and the other end of the heat exchange pipe is communicated with the air suction pipe.
6. The power distribution cabinet convenient for heat dissipation of claim 1, wherein: the upper end of bottom plate is equipped with the base of the fixed cabinet body, and the lower extreme of bottom plate is equipped with the backup pad that is located underground, the lower extreme of backup pad is connected with the clamp plate.
7. The power distribution cabinet convenient for heat dissipation of claim 1, wherein: the air outlet of the air inlet pipe is provided with a net cover, and the number of the air inlet pipes is multiple and is respectively connected with the bottom and the side wall of the cabinet body.
8. The power distribution cabinet convenient for heat dissipation of claim 3, wherein: exhaust device includes fan and exhaust pipe, the exhaust pipe is connected with the upper portion of cabinet side wall, and the one end of exhaust pipe is connected with the cover that induced drafts of loudspeaker form, and it is internal that the cover that induced drafts is located the cabinet, and the other end of exhaust pipe is connected with opening exhaust pipe down, the exhaust pipe is located the outside of the cabinet body, the fan is the formula of induced drafting, and the fan is located the exhaust pipe.
9. The power distribution cabinet convenient for heat dissipation of claim 8, wherein: a blocking net is arranged in the air suction hood, and an air deflector is arranged at the joint of the exhaust pipe and the exhaust pipe.
10. The power distribution cabinet convenient for heat dissipation of claim 8, wherein: the exhaust pipe is communicated with the suction pipe through a return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210950753.3A CN115275805A (en) | 2022-08-09 | 2022-08-09 | Power distribution cabinet convenient for heat dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210950753.3A CN115275805A (en) | 2022-08-09 | 2022-08-09 | Power distribution cabinet convenient for heat dissipation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115275805A true CN115275805A (en) | 2022-11-01 |
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ID=83750380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210950753.3A Pending CN115275805A (en) | 2022-08-09 | 2022-08-09 | Power distribution cabinet convenient for heat dissipation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115275805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116131142A (en) * | 2023-02-23 | 2023-05-16 | 南京诚与慧机电科技有限公司 | Dustproof cooling switch board of using in desert area |
-
2022
- 2022-08-09 CN CN202210950753.3A patent/CN115275805A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116131142A (en) * | 2023-02-23 | 2023-05-16 | 南京诚与慧机电科技有限公司 | Dustproof cooling switch board of using in desert area |
| CN116131142B (en) * | 2023-02-23 | 2023-11-24 | 天津市津开电力设备制造有限公司 | Dustproof cooling switch board of using in desert area |
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