CN111029949A - Transformer case with dehumidification cooling function - Google Patents

Transformer case with dehumidification cooling function Download PDF

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Publication number
CN111029949A
CN111029949A CN202010024868.0A CN202010024868A CN111029949A CN 111029949 A CN111029949 A CN 111029949A CN 202010024868 A CN202010024868 A CN 202010024868A CN 111029949 A CN111029949 A CN 111029949A
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China
Prior art keywords
box
temperature
humidity
air
dehumidification
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Pending
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CN202010024868.0A
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Chinese (zh)
Inventor
谢晓佳
林倍铭
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Individual
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Individual
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Priority to CN202010024868.0A priority Critical patent/CN111029949A/en
Publication of CN111029949A publication Critical patent/CN111029949A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56Cooling; Ventilation
    • H02B1/565Cooling; Ventilation for cabinets
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/28Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Drying Of Gases (AREA)

Abstract

The invention discloses a transformer box with dehumidification and cooling functions, and belongs to the technical field of transformer boxes. The technical scheme of the invention is as follows: the box door is provided with a temperature and humidity balancing device, the temperature and humidity in the transformer box are detected through a temperature and humidity sensor, a measured value is transmitted to the controller, when the humidity reaches a threshold value, the semiconductor refrigerating sheet is controlled to work through the controller, the semiconductor refrigerating sheet forms a cold end and a hot end under the power-on condition, meanwhile, the controller controls the exhaust fan at the air outlet to suck external air, when the air passes through the cold end heat absorption fin, water vapor is condensed into water and then enters the water collecting chamber to be discharged, the condensed and dehumidified air is heated and heated through the hot end heat dissipation fin, the humidity of the air is further reduced, and finally, dry and hot air is discharged into the transformer box from the air outlet until the relative humidity is reduced below the set threshold value; the device can ensure that the humidity of the air blown into the box body is lower, and the work of the device is not influenced by the outdoor humidity.

Description

Transformer case with dehumidification cooling function
Technical Field
The invention belongs to the technical field of power transformation boxes, and particularly relates to a power transformation box with dehumidification and cooling functions.
Background
The transformer box is a box body of a place for converting, concentrating and distributing voltage and current of electric energy in an electric power system.
The transformer box is exposed to rain, snow, fog, wind and other environments for a long time and is easy to be invaded by water vapor in the nature. In addition, in order to prevent rainwater from directly invading, the secondary cable in the box body penetrates into the box body from the lower part of the box body, at the moment, the box body can be buckled above a cable trench like a cover, moisture in the trench continuously enters the box body under the chimney effect, the humidity in the box can be far greater than atmospheric humidity under a specific environment, the temperature difference between day and night can aggravate the phenomenon, and condensation, frosting and even freezing are generated inside the box body. These outdoor units may also experience high temperature and humidity conditions when exposed to high temperatures in the summer.
Because various secondary system elements for controlling the action of the primary equipment and reflecting the working condition of the primary equipment are borne in the outdoor equipment, the outdoor equipment mainly comprises a relay, a terminal strip, a contactor, an auxiliary node, a microswitch, a control button and a secondary cable. The working voltage is usually alternating current and direct current 220V, the insulating medium is usually air and insulating plastic, the insulating distance is usually centimeter-level, and a normal-temperature and dry operating environment must be provided to ensure the normal operation of the equipment. If the temperature is too high, the insulating property of the plastic is influenced, and the service life is reduced; if the temperature is too low, the plastic becomes brittle, the service life is reduced, and the phenomena of equipment cracking, node jamming and incorrect element action are easy to occur during the element action; if the humidity is too high, not only the aging and modification of the element are aggravated to influence the service life, but also condensation can be generated at low temperature, and a part of a secondary circuit is conducted to cause the false operation of the secondary circuit, and if the humidity is high, the aging, corrosion and jamming of the secondary element are aggravated to cause the probability of the movement rejection of the secondary element to be increased. Therefore, the ideal working environment of the outdoor box body is dry normal temperature, wherein the drying is the key, and the box body is basically required to be incapable of condensing.
In order to ensure that the equipment is in a relatively dry state and at a proper temperature, substation operation and maintenance personnel usually adopt a traditional cooling and dehumidifying method such as opening air holes or installing a moisture-removing heater for treatment, and the methods have some defects,
vent hole: the method is a method for reducing the humidity in the box body by opening two small holes on two sides of the box body to enable the box body to form convection with the environment and discharge water vapor entering from a cable duct to the outside. However, the method has certain limitations, and for coastal areas, mountain areas or other humid areas or environments, if atmospheric humidity tends to be saturated, the humidity in the box also tends to be saturated or even supersaturated, condensation is generated under temperature difference, and the working requirements of the box body cannot be completely met.
Installing a moisture removal heater: the method is characterized in that a heater is arranged in a box body, and when the humidity is overlarge, the heater is started through a humidity controller, so that the temperature in the box body is quickly increased. According to the temperature and humidity curve, the temperature rises and the humidity (saturation) falls, so as to prevent the equipment from being condensed. Meanwhile, the temperature rise can improve the air pressure in the box body, so that the moisture in the box body is discharged out of the box body, and the water content in the box body is reduced. However, because the box body usually has a certain tightness, the pressure difference generated by the method cannot effectively discharge moisture in the box body, for example, if the heating power is increased once, high temperature can be generated in the box body, for example, moisture can enter the box body more quickly when the heater is stopped, so that the moisture enters a vicious circle of stuffy humidity, and if the temperature is too high and the humidity is high and the moisture does not condense, secondary elements can rust, so that the temperature suddenly drops, the heating power cannot maintain the temperature, and more severe condensation can be generated in the box body.
Therefore, it is necessary to provide a power transformation box with dehumidification and cooling functions to solve the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention aims to provide a power transformation box with dehumidification and cooling functions, so that the problems that the existing ventilation method is difficult to cope with the high-humidity environment, and the method for installing a moisture-removing heater is easy to cause the box body to become high-temperature high-humidity and difficult to achieve the dehumidification and cooling effects are solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a power transformation box with dehumidification and cooling functions comprises a box body and a box door hinged with one side of an opening of the box body through a hinge; the refrigerator is characterized in that a temperature and humidity balance device is fixedly mounted on the refrigerator door and faces a side face of the inner cavity of the refrigerator body, an air inlet is formed in the bottom of one side of the refrigerator door facing outwards, an air outlet is formed in the top of the refrigerator body, an exhaust fan corresponding to the air outlet is fixedly connected to the top wall of the refrigerator body, and a temperature and humidity sensor is fixedly mounted on the inner side wall of the refrigerator body.
The temperature and humidity balance device comprises a shell, a display screen, a key-in end and an air outlet are arranged on the outer surface of the temperature and humidity balance device, the display screen and the key-in end are fixedly installed on the position, leaning against the temperature and humidity balance device, of the temperature and humidity balance device, and the air outlet is located below the key-in end.
Wherein, the inside of the temperature and humidity balancing device is provided with a semiconductor refrigeration piece and a controller, the bottommost part of the inner cavity of the temperature and humidity balancing device is also provided with a water collecting chamber, the controller is fixedly arranged at the upper position in the shell, the semiconductor refrigeration piece is fixedly arranged at the middle position in the shell, the cold end of the semiconductor refrigeration piece is provided with a cold end heat absorption fin, the hot end of the semiconductor refrigeration piece is provided with a hot end heat dissipation fin, the air inlet at the outer side of the box door is communicated with the input end of the cold end heat absorption fin through a pipeline, the water phase output end of the cold end heat absorption fin is communicated with the input end of the water collecting chamber through a pipeline, the output end of the water collecting chamber is communicated with a water outlet fixedly connected with the bottom of the water collecting chamber through a pipeline, the gas phase output end of the cold, and an exhaust fan is fixedly arranged at the opening position of the air outlet.
The box body and the box door are made of rustproof metal materials, and heat insulation layers are adhered to the wall of the inner cavity of the box body and one side of the box door facing the inner cavity of the box body in all exposed areas.
The temperature and humidity sensor, the exhaust fan, the semiconductor refrigeration piece, the display screen, the key-in end and the exhaust fan are all electrically connected with the controller.
Wherein, the top outside position fixed mounting of box has sheltered from the ceiling.
Wherein, the outward side of the box door is provided with a handle.
Compared with other methods, the method has the beneficial technical effects that:
the invention relates to a transformer box with dehumidification and temperature reduction functions, wherein a temperature and humidity balance device is fixedly arranged on a box door and one side surface facing to an inner cavity of a box body, the temperature and the humidity in the transformer box are detected by a temperature and humidity sensor arranged in the box body, a measured value is transmitted to a controller in the temperature and humidity balance device, when the humidity reaches a preset threshold value, a semiconductor refrigerating sheet in the box body is controlled by the controller to work, the semiconductor refrigerating sheet can form a cold end and a hot end at two ends under the condition of electrifying, meanwhile, the controller controls a suction fan at an air outlet to rotate to generate negative pressure to suck external air from an air inlet outside the box door, the sucked air condenses water vapor into water when meeting cold-end heat absorption fins in a low-temperature state, then enters a water collecting chamber through a pipeline, finally is discharged through a water outlet, and the condensed and dehumidified air is heated in a high-temperature environment through hot-end, further reducing the relative humidity of the air, finally discharging the treated dry and hot air from the air outlet into a transformer box, and repeating the above dehumidification cycle until the relative humidity is reduced below a set threshold value; compared with the traditional damp-dispelling heater, the device can ensure that the humidity of the air blown into the box body is lower while the air is blown to cool the transformer box, and compared with the traditional ventilation method, the working environment is not influenced by the content of the outdoor humidity.
Drawings
FIG. 1 is a schematic structural view of the apparatus of the present invention with a door 2 open;
FIG. 2 is a schematic diagram of the internal structure of the temperature and humidity balance device 3 in the device of the present invention;
FIG. 3 is a schematic structural view of the apparatus of the present invention with the door 2 closed;
1. a box body; 11. an air outlet; 12. a temperature and humidity sensor; 13. an exhaust fan; 14. covering a ceiling; 2. a box door; 21. an air inlet; 22. a handle; 3. a temperature and humidity balancing device; 31. a housing; 32. a semiconductor refrigeration sheet; 321. a cold end heat absorbing fin; 322. a hot-end heat dissipation fin; 33. a controller; 34. a water collection chamber; 35. a water outlet; 36. a display screen; 37. a key-in end; 38. an air outlet; 39. an exhaust fan; 4. an insulating layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in 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. The words "upper", "lower", "left" and "right" when used herein are merely intended to designate corresponding upper, lower, left and right directions in the drawings, and do not limit the structure thereof.
As shown in fig. 1 to 3, the power transformation box with dehumidification and cooling functions comprises a box body 1 and a box door 2 hinged to one side of an opening of the box body 1 through a hinge; a temperature and humidity balancing device 3 is fixedly arranged on one side surface of the box door 2 facing the inner cavity of the box body 1 and is used for dehumidifying and cooling the inside of the box body 1; in order to lead the air flowing in the box body 1 to take away the high temperature generated in the work process, on one hand, the bottom of the outward side of the box door 2 is provided with an air inlet 21, the top of the box body 1 is provided with an air outlet 11, and the air outlet 11 is used for rising and discharging the hot air in the box body 1, keeping the air in the box body 1 circulating and playing a role of reducing the temperature; and in order to improve the efficiency of heat extraction in the box 1, fixedly connected with and the corresponding exhaust fan 13 of air exit 11 on the roof of box 1, fixed mounting has temperature and humidity sensor 12 on the inside wall of box 1 for detect the temperature and humidity in the box 1, so that compare with the settlement threshold value, and control corresponding mechanism and open and stop and make and keep a normal atmospheric temperature and dry suitable operational environment in the box 1.
Further, the temperature and humidity balance device 3 comprises a housing 31, a display screen 36, a key-in end 37 and an air outlet 38 are arranged on the outer surface of the temperature and humidity balance device 3, the display screen 36 and the key-in end 37 are fixedly installed at a position above the temperature and humidity balance device 3, the display screen 36 is used for a person to check various data, and the key-in end 37 is used for manually setting various temperature and humidity thresholds, such as the temperature and humidity threshold required by key-in; the air outlet 38 is located below the keyed end 37.
Further, a semiconductor refrigeration piece 32 and a controller 33 are arranged inside the temperature and humidity balance device 3, the semiconductor refrigeration piece 32 is in the prior art, the working principle of the semiconductor refrigeration piece is not described in much detail, and a cold end and a hot end can be formed at two ends of the semiconductor refrigeration piece; a water collecting chamber 34 is further arranged at the bottommost part of the inner cavity of the temperature and humidity balance device 3, the water collecting chamber 34 is used for collecting condensed water, the controller 33 is fixedly installed at the upper position in the shell 31, the controller 33 is used for analyzing and processing information and controlling each electrical component to operate according to a set program, and therefore an expected effect is achieved; the semiconductor refrigeration sheet 32 is fixedly installed in the shell 31 close to the middle position, a cold end heat absorption fin 321 is arranged at the cold end of the semiconductor refrigeration sheet 32, and the cold end heat absorption fin 321 is used for enlarging the contact surface with air in a lower environment, so that water vapor in the air is condensed into liquid water when meeting cold and falls down; the hot end of the semiconductor refrigeration piece 32 is provided with a hot end heat dissipation fin 322, the same hot end heat dissipation fin 322 is used for quickly dissipating heat of the hot end and contacting with air, so that the air is dried and the humidity is further reduced, the air inlet 21 on the outer side of the box door 2 is communicated with the input end of the cold end heat absorption fin 321 through a pipeline, the water phase output end of the cold end heat absorption fin 321 is communicated with the input end of the water collection chamber 34 through a pipeline, the output end of the water collection chamber 34 is communicated with the water outlet 35 fixedly connected to the bottom of the water collection chamber 34 through a pipeline, the gas phase output end of the cold end heat absorption fin 321 is communicated with the input end of the hot end heat dissipation fin 322 through a pipeline, the output end of the hot end heat dissipation fin 322 is communicated with the air outlet 38, and the opening position.
Further, box 1 and chamber door 2 all adopt rust-resistant metal material to make, and on the inner chamber wall of box 1, with chamber door 2 towards one side of the 1 inner chamber of box, all exposed region all is stained with insulating layer 4 outward, and insulating layer 4 can adopt the foam preparation to form, like this when the outside temperature of transformer case and the inside temperature of transformer case differ great, can prevent steam condensation drop on box 1, avoid causing the erosion to the transformer case, can effectual improvement transformer case's life.
Further, the temperature and humidity sensor 12, the exhaust fan 13, the semiconductor refrigeration sheet 32, the display screen 36, the key-in terminal 37 and the exhaust fan 39 are all electrically connected with the controller 33.
Further, a shielding ceiling 14 is fixedly installed at a position outside the top of the box body 1, and is used for shielding the air outlet 11 to prevent rainwater and dust from entering.
Further, a handle 22 is disposed on an outward side of the box door 2.
In the power transformation box with dehumidification and cooling functions of this embodiment, dehumidification parameters and states can be regulated and controlled through a key input end 37 on a temperature and humidity balance device 3, temperature and humidity in the box body 1 can be measured through a temperature and humidity sensor 12 and transmitted to a controller 33, the controller 33 controls a semiconductor refrigeration sheet 32 to work, both ends of the semiconductor refrigeration sheet 32 form a cold end and a hot end under the condition of power-on, meanwhile, the controller 10 controls an exhaust fan 39 to rotate to generate negative pressure to suck air from an air inlet 21, the sucked air condenses water vapor into water through a cold end heat absorption fin 321, then enters a water collection chamber 34 through a pipeline and is discharged through a water outlet 35, the dehumidified air is heated and heated through a hot end heat dissipation fin 322 to reduce the relative humidity of the air, finally, the processed dry and hot air is discharged into the box body 1 from an air outlet 38, and the above dehumidification cycle is repeated, until the relative humidity falls below a set threshold.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.

Claims (7)

1. The utility model provides a transformer case with dehumidification cooling function, includes box (1) and passes through hinge articulated chamber door (2) with opening part one side of box (1), its characterized in that, chamber door (2) are gone up and a side fixed mounting towards box (1) inner chamber has temperature and humidity balancing unit (3), and chamber door (2) one side bottom outwards is equipped with air intake (21), the top of box (1) is equipped with air exit (11) to fixedly connected with and corresponding exhaust fan (13) of air exit (11) on the roof of box (1), fixed mounting has temperature and humidity sensor (12) on the inside wall of box (1).
2. The power transformation box with the functions of dehumidification and temperature reduction according to claim 1, characterized in that the temperature and humidity balance device (3) comprises a shell (31), a display screen (36), a key-in end (37) and an air outlet (38) are arranged on the outer surface of the temperature and humidity balance device (3), the display screen (36) and the key-in end (37) are fixedly installed at the position, close to the temperature and humidity balance device (3), of the upper portion, and the air outlet (38) is located below the key-in end (37).
3. The power transformation box with the dehumidification and temperature reduction functions as claimed in any one of claims 1 to 2, wherein a semiconductor refrigeration sheet (32) and a controller (33) are arranged inside the temperature and humidity balance device (3), a water collection chamber (34) is further arranged at the bottommost portion of an inner cavity of the temperature and humidity balance device (3), the controller (33) is fixedly installed at an upper position inside the shell (31), the semiconductor refrigeration sheet (32) is fixedly installed at a middle position inside the shell (31), a cold end heat absorption fin (321) is arranged at a cold end of the semiconductor refrigeration sheet (32), a hot end heat dissipation fin (322) is arranged at a hot end of the semiconductor refrigeration sheet (32), an air inlet (21) at the outer side of the box door (2) is communicated with an input end of the cold end heat absorption fin (321) through a pipeline, and an aqueous phase output end of the cold end heat absorption fin (321) is communicated with an input end of the water collection chamber (34) through a pipeline, the output end of the water collecting chamber (34) is communicated with a water outlet (35) fixedly connected to the bottom of the water collecting chamber (34) through a pipeline, the gas phase output end of the cold end heat absorbing fin (321) is communicated with the input end of the hot end heat radiating fin (322) through a pipeline, the output end of the hot end heat radiating fin (322) is communicated with the air outlet (38), and an exhaust fan (39) is fixedly installed at the opening position of the air outlet (38).
4. The power transformation box with the functions of dehumidification and cooling as claimed in claim 1, wherein the box body (1) and the box door (2) are both made of rustproof metal materials, and a heat insulation layer (4) is adhered to all exposed areas on the inner cavity wall of the box body (1) and one side of the box door (2) facing the inner cavity of the box body (1).
5. The power transformation box with the dehumidification and temperature reduction functions as claimed in claim 1, wherein the temperature and humidity sensor (12), the exhaust fan (13), the semiconductor refrigeration piece (32), the display screen (36), the key input end (37) and the exhaust fan (39) are electrically connected with the controller (33).
6. The power transformation box with the functions of dehumidification and cooling as claimed in claim 1, wherein a shielding ceiling (14) is fixedly installed at a position outside the top of the box body (1).
7. The power transformation box with the functions of dehumidification and temperature reduction according to claim 1, wherein a handle (22) is arranged on one side of the box door (2) facing outwards.
CN202010024868.0A 2020-01-10 2020-01-10 Transformer case with dehumidification cooling function Pending CN111029949A (en)

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Cited By (8)

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CN112186516A (en) * 2020-08-24 2021-01-05 国网山东省电力公司惠民县供电公司 Power cabinet for power engineering
CN112863817A (en) * 2021-01-05 2021-05-28 华翔翔能科技股份有限公司 Automatic dust removal box transformer substation and dust removal method thereof
CN113246470A (en) * 2021-05-25 2021-08-13 江苏海洋大学 Multifunctional wire rod storage box suitable for large FDM equipment and use method thereof
CN114664528A (en) * 2022-03-21 2022-06-24 北京中盈嘉工程建设有限公司 Direct current magnetic bias suppression device
CN116499209A (en) * 2023-04-04 2023-07-28 中国农业大学 An infrared drying test device based on thermoelectric effect
CN116794366A (en) * 2023-05-13 2023-09-22 杭州孔盛科技有限公司 Electric energy metering box with anticreep function
CN116866695A (en) * 2023-08-25 2023-10-10 杭州海康威视数字技术股份有限公司 filming equipment
CN118899752A (en) * 2024-07-17 2024-11-05 常州领创电气科技有限公司 A micro-positive pressure fresh air fan for the side of the ring network box with air conditioning function

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112186516A (en) * 2020-08-24 2021-01-05 国网山东省电力公司惠民县供电公司 Power cabinet for power engineering
CN112863817A (en) * 2021-01-05 2021-05-28 华翔翔能科技股份有限公司 Automatic dust removal box transformer substation and dust removal method thereof
CN113246470A (en) * 2021-05-25 2021-08-13 江苏海洋大学 Multifunctional wire rod storage box suitable for large FDM equipment and use method thereof
CN113246470B (en) * 2021-05-25 2022-04-08 江苏海洋大学 A multifunctional wire storage box suitable for large-scale FDM equipment and using method thereof
CN114664528A (en) * 2022-03-21 2022-06-24 北京中盈嘉工程建设有限公司 Direct current magnetic bias suppression device
CN116499209A (en) * 2023-04-04 2023-07-28 中国农业大学 An infrared drying test device based on thermoelectric effect
CN116794366A (en) * 2023-05-13 2023-09-22 杭州孔盛科技有限公司 Electric energy metering box with anticreep function
CN116794366B (en) * 2023-05-13 2023-12-19 杭州孔盛科技有限公司 Electric energy metering box with anticreep function
CN116866695A (en) * 2023-08-25 2023-10-10 杭州海康威视数字技术股份有限公司 filming equipment
CN116866695B (en) * 2023-08-25 2024-01-02 杭州海康威视数字技术股份有限公司 filming equipment
CN118899752A (en) * 2024-07-17 2024-11-05 常州领创电气科技有限公司 A micro-positive pressure fresh air fan for the side of the ring network box with air conditioning function

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Application publication date: 20200417