CN108281913B - Cascade type circulating channel cooling, dehumidifying and condensation-preventing electric equipment guaranteeing system and method - Google Patents

Cascade type circulating channel cooling, dehumidifying and condensation-preventing electric equipment guaranteeing system and method Download PDF

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CN108281913B
CN108281913B CN201810130091.9A CN201810130091A CN108281913B CN 108281913 B CN108281913 B CN 108281913B CN 201810130091 A CN201810130091 A CN 201810130091A CN 108281913 B CN108281913 B CN 108281913B
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air
electrical equipment
humidity
module
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CN108281913A (en
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王成震
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Hubei Zhongxuntai Technology Co ltd
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Hubei Zhongxuntai Technology Co ltd
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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
    • 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)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a protection system and a protection method for overlapping type circulating channel cooling, dehumidifying and condensation-preventing electrical equipment, wherein the system comprises a plurality of temperature and humidity adjusting units, temperature and humidity sensors for monitoring temperature and humidity at different positions inside and outside an electrical cabinet, and an intelligent analysis environmental control module for controlling the temperature and humidity adjusting units. The temperature and humidity control unit is used for detecting the internal and external environment of the electric cabinet through the temperature and humidity sensor and controlling the temperature and humidity control unit to control the temperature and humidity of air circulating in the electric cabinet, wherein the temperature and humidity can be reduced and dehumidified through enabling the air to quickly cool and dew in the semiconductor temperature control module, and the semiconductor temperature control module and/or the auxiliary heat module heat the air to be higher than the ambient dew point temperature so as to prevent the air from generating condensation in the electric cabinet. Particularly, the invention provides a cascade circulation channel formed by arranging two temperature and humidity control units up and down, which can realize the functions of differential cooling, dehumidification and condensation prevention under different climatic environments.

Description

Cascade type circulating channel cooling, dehumidifying and condensation-preventing electric equipment guaranteeing system and method
Technical Field
The invention relates to the internal environment guarantee of an electrical cabinet, in particular to a system and a method for guaranteeing cooling, dehumidifying and condensation-preventing electrical equipment of an overlapping type circulating channel.
Background
Most of traditional power equipment is indoor, and the power equipment installed outdoors basically dissipates heat in a natural ventilation mode. In recent years, along with the strong popularization of intelligent power grids, the demands of intelligent equipment such as intelligent substations, intelligent control cabinets, sink control cabinets and intelligent terminals are increased, and the demands of stainless steel outdoor cabinets are also increased continuously. Because intelligent electronic equipment such as detection, communication and the like is configured in the outdoor cabinet. The design of high density integration makes these smart devices generate huge heat release. At present, the microelectronic assembly is more and more densely assembled, and the outdoor working environment is also changed to a high temperature direction rapidly. The reliability of the electronic component is reduced by 10% every 2 ℃ when the temperature of the electronic component is increased, and the service life of the electronic component is reduced by 50% when the temperature exceeds the allowable working temperature of 8 ℃. Therefore, timely heat dissipation becomes an important factor affecting the service life of the device. Not only is the temperature high, and the south is in continuous summer and overcast weather, but also a long-term high-temperature and high-humidity environment is formed in the cabinet. The traditional natural ventilation heat dissipation type outdoor cabinet can not meet the requirements of field environment use.
Nowadays, more and more outdoor cabinets start to adopt heat exchangers, compressors or semiconductor cabinet air conditioning equipment as cooling schemes, but due to the environment of a transformer substation, the shielding is not very severe, the high temperature of a stainless steel cabinet under direct sunlight often reaches more than 60 ℃, and once continuous rainfall occurs, the humidity is basically more than 95%. The prior technical means generally have a series of application defects such as refrigeration only, poor temperature control effect, simple function, no operation safety protection measures, unstable operation, high failure rate, difficult overhaul and maintenance and the like, and cannot effectively control the high temperature problem in the cabinet, so that humidity control is not from talking. How to realize effective temperature and humidity management on an outdoor cabinet is now a focus problem of ensuring safe production of an electric power system.
According to the 2015 key anti-accident technical measure file issued by the national grid company, aiming at 15.2.2 requirements of the national grid company for preventing the complete stop of sixteen measures (trial) of a transformer substation, the intelligent control cabinet has the temperature and humidity adjusting function, the minimum temperature in the cabinet is kept above +5 ℃, the maximum temperature in the cabinet is not higher than the maximum temperature outside the cabinet or 40 ℃, and the humidity is kept below 90%.
At present, the temperature and humidity control of the existing outdoor electrical cabinet adopts the following technologies:
1) Outdoor electric cabinet fan heat dissipation technology
The cooling capability of the fan cooling technology of the outdoor electrical cabinet is limited, and the cooling effect completely cannot reach the technical standard required by the power grid. The intelligent temperature and humidity control system also has no condensation prevention and dehumidification capability, has no management and control function, can not actively control the temperature and humidity of the environment in the cabinet, and has extremely high fault rate of long-time continuous operation of the fan;
2) Heat exchanger radiating technology for outdoor electrical cabinet
The heat dissipation technology of the heat exchanger of the outdoor electrical cabinet mainly adopts a heat exchange mode inside and outside the cabinet to release certain heat, and the heat dissipation effect of the heat exchanger can not completely reach the technical standard required by a power grid in high-temperature weather. The device does not have condensation prevention and dehumidification capability, has certain management capability, can not reach a working target, and can be in a high-load working state for a long time under severe weather, so that the fan and the electric control device are easy to break down. Although the electronic accessories of the compressor and the semiconductor temperature control equipment are fewer, the failure rate is lower, due to the adoption of the installation of the integral cabinet door, once the failure occurs, complex disassembly and long maintenance period are required, and the operation guarantee function of the outdoor electrical cabinet is far from the operation guarantee requirement of a power grid;
3) Temperature and humidity control technology for outdoor electrical cabinet compressor air conditioner
The outdoor electrical cabinet compressor air conditioner temperature and humidity control technology has strong high-temperature inhibition capability, but the working mode aims at the condensation prevention and dehumidification requirements of the outdoor electrical cabinet operation requirement, and the processing capability is a large short plate. Because the device of this type does not have the capability of fine management control, and the single duct structure cannot realize efficient system circulation. The high-temperature and humidity inhibition capability of densely arranged electrical equipment in the outdoor electrical cabinet still cannot reach the guarantee goal of reliable operation of the power grid, and the condensation prevention capability is less reliable. And because the volume is too large and the weight is too heavy, the cabinet door installation scheme not only limits the effective refrigeration power range of the cabinet door, but also limits the installation universality of the equipment for adapting to the types of outdoor cabinets with different specifications. The compressor not only has large vibration, but also is easy to cause refrigerant leakage, and the two indexes are not suitable for the use requirement of the electric cabinet. The equipment in the outdoor electrical cabinet is required to operate continuously and reliably for 24 hours all the year round, and the temperature and humidity regulating device is required to meet the matched operation index of 7 x 24 hours for ensuring the safe operation reliability. Aiming at the heat exchanger scheme, the product adopts more electromechanical and control elements, and the outdoor severe high-temperature high-humidity salt fog operation environment and the perennial uninterrupted operation are adopted, so that the equipment failure rate is necessarily high. The air conditioner products in the same type are basically single door or top mounted, and once any device in a single machine fails, the whole equipment is directly paralyzed and cannot be used normally. The single machine maintenance must be disassembled by the whole cabinet door, and the operation of field professionals is also carried out outside the manufacturer, the round trip logistics transportation and the rush repair are organized, the round trip of the condition is serious, the round trip is possible for a plurality of months, and the hidden trouble of the safe operation of equipment in the cabinet is serious when the continuous bad weather is met. The lack of the fault active communication function also ensures that the equipment fault can not be treated quickly for a long time, and the electrical equipment in the cabinet can run in a high-temperature and high-humidity environment for a long time, so that the high-reliability running of the equipment in the outdoor electrical cabinet can not be effectively ensured;
4) Semiconductor temperature and humidity regulating device for outdoor electrical cabinet
The semiconductor temperature and humidity regulation device of the existing outdoor electrical cabinet belongs to novel electronic temperature and humidity control equipment, has no compressor and refrigerant, has an active refrigeration and dehumidification function, and is very suitable for the safe use requirement of the outdoor electrical cabinet. However, the existing equipment cannot realize efficient cooling fin heat dissipation, so that the volume and weight of the equipment cannot be reduced. Therefore, once the high-power electronic temperature and humidity regulation equipment meeting the operation requirement of the power grid is required to be installed, the same series of safety operation reliability guarantee problems of the cabinet-mounted compressor air conditioner exist. The existing equipment is also lack of fine temperature and humidity control capability, so that the equipment is large in operation energy consumption and low in efficiency, and the equipment aging serious failure rate is high. The fatal defect of the single air duct local circulation structure design makes the device completely incapable of effectively inhibiting the problem of condensation in the cabinet;
5) Semiconductor dehumidifier for outdoor electric cabinet
The semiconductor dehumidifying device of the outdoor electrical cabinet has the active dehumidifying function, and reduces the volume and weight of equipment, but the modifications are all under the premise of sacrificing the effective dehumidifying power. The dehumidification effect is also limited by the heat dissipation capacity of the refrigerating sheets and the low-efficiency single-air-duct circulation structure. In the face of continuous rainy season or high-temperature and high-humidity environment, the dehumidification efficiency of the solar energy dehumidification system can not basically meet the safety requirement of power grid operation, and the condensation prevention capability is not considered. Although the weight is not large, the complex cabinet door installation structure still causes difficult maintenance and disassembly, and the safety operation reliability of the outdoor electrical cabinet still has great hidden trouble;
in addition, through intensive research on the space environment in the outdoor electrical cabinet, the main reason for the formation of condensation is found to be that the cabinet cannot be completely sealed due to the heat dissipation requirement of the wiring channel and the ventilation structure of the electrical cabinet, and the air humidity is overlarge. Because the greater the ambient humidity, the closer the dew point is to ambient temperature, and temperatures below the dew point are very prone to phase-change condensation of the humid air on the metal cabinet walls and the metal dielectric surfaces of the electrical equipment. Some cabinets have heating plates installed inside, but because the starting threshold cannot be quantified, the heating space is limited, and the moist air is not effectively restrained, the condensation is also very easy to generate.
In view of the foregoing, there is a need for an electrical equipment protection device capable of solving the temperature and humidity control requirements of an outdoor electrical cabinet.
Disclosure of Invention
The invention aims to solve the technical problem of providing a protection system and a protection method for cooling, dehumidifying and condensation-preventing electrical equipment of an overlapping type circulating channel aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
in a first aspect, an overlapping type circulating channel cooling, dehumidifying and condensation-preventing electrical equipment protection system. The system comprises a temperature and humidity control unit arranged in the electrical equipment, a temperature and humidity sensor used for monitoring the interior of the electrical equipment, an external temperature and humidity sensor used for monitoring the exterior of the electrical equipment, an intelligent analysis environmental control module, a power supply module and a drainage pipeline; the temperature and humidity control units are provided with at least two;
the temperature and humidity control unit comprises an air circulation channel which is vertically arranged and is only provided with openings at the upper end and the lower end, the opening at the upper end of the air circulation channel is an air guide opening communicated with the interior of the electrical equipment, and the opening at the lower end of the air circulation channel is communicated with the interior of the electrical equipment through an internal circulation fan module;
the temperature and humidity control unit also comprises an auxiliary heating module and a semiconductor temperature control module which are used for adjusting the air temperature in the air circulation channel; the auxiliary thermal module is arranged in the air circulation channel; one surface of the semiconductor temperature control module forms the inner wall of the air circulation channel; the other surface of the semiconductor temperature control module forms the outer wall of the air circulation channel; the other side of the semiconductor temperature control module is provided with a heat dissipation fan module with the air outlet direction facing the outside of the electrical equipment;
the intelligent analysis environmental control module is electrically connected with the auxiliary heat module, the semiconductor temperature control module, the internal circulation fan module, the heat dissipation fan module, the temperature and humidity sensor, the external temperature and humidity sensor and the power supply module and is used for controlling the auxiliary heat module, the semiconductor temperature control module, the internal circulation fan module, the heat dissipation fan module, the temperature and humidity sensor and the power supply module;
the power module is electrically connected with the auxiliary heat module, the semiconductor temperature control module, the internal circulation fan module, the heat dissipation fan module, the temperature and humidity sensor, the external temperature and humidity sensor and the intelligent analysis environmental control module and is used for supplying power to the auxiliary heat module, the semiconductor temperature control module, the internal circulation fan module, the heat dissipation fan module, the temperature and humidity sensor, the external temperature and humidity sensor and the intelligent analysis environmental control module;
the lower end opening of the air circulation channel is also connected with the input end of the drainage pipeline through a condensate port; the output end of the drainage pipeline is arranged outside the electrical equipment. Further, the system includes at least two of the temperature and humidity sensors disposed at different heights.
Further, the system comprises at least two temperature and humidity control units arranged at different heights.
Further, the system comprises at least two temperature and humidity control units which are arranged adjacently up and down; at least two temperature and humidity control units adjacent to each other up and down form an overlapping type circulating channel;
the lower end opening of the air circulation channel of the upper temperature and humidity control unit adjacent to each other in the overlapping circulation channel is arranged above the upper end opening of the air circulation channel of the lower temperature and humidity control unit adjacent to each other in the overlapping circulation channel.
Further, the cascade circulation channel is provided with at least two.
Further, the internal circulation fan module is a bidirectional variable frequency fan.
In a second aspect, the invention provides a method for guaranteeing refrigeration, cooling, dehumidification and condensation prevention electrical equipment of an overlapping type circulating channel, which comprises the following steps:
the temperature and humidity sensor and the external temperature and humidity sensor collect the internal and external environmental data of the electrical equipment and send the environmental data to the intelligent analysis environmental control module;
at least one temperature and humidity control unit adjusts the internal environment of the electrical equipment.
For example, the internal circulation fan module is opened to suck air, and the auxiliary heating module and the semiconductor temperature control module in the temperature and humidity control unit can both heat to increase the internal temperature of the electrical equipment; or the auxiliary thermal module does not work, and the internal circulation fan is started to cool the inside of the electrical equipment through the semiconductor temperature control module; and the internal circulation fan module is only started to regulate the air temperature balance circulation in the electrical equipment.
Further, the at least one temperature and humidity control unit adjusts the internal environment of the electrical equipment, specifically including an anti-condensation program:
and the internal circulation fan module is used for extracting air in the electrical equipment, and the air enters the air circulation channel from the opening at the upper end/the lower end of the air circulation channel, so that the air is heated by the auxiliary heating module and/or the semiconductor temperature control module, and flows back into the electrical equipment from the opening at the lower end/the upper end of the air circulation channel.
Further, the at least one temperature and humidity control unit adjusts the internal environment of the electrical equipment, specifically including a dehumidification and condensation prevention program:
and the internal circulation fan module is used for extracting air in the electrical equipment, and the air enters the air circulation channel from the opening at the upper end/the lower end of the air circulation channel, so that the air passes through the semiconductor temperature control module for refrigeration, and then the air passes through the auxiliary thermal module for heating, and flows back into the electrical equipment from the opening at the lower end/the upper end of the air circulation channel.
Further, the at least one temperature and humidity control unit adjusts the internal environment of the electrical equipment, and specifically includes a cooling and dehumidifying program:
the internal circulation fan module is used for extracting air in the electrical equipment, the air enters the air circulation channel from the opening at the upper end/lower end of the air circulation channel, so that the air passes through the semiconductor temperature control module for cooling, condensation is generated on the semiconductor temperature control module, the condensation flows back into the electrical equipment from the opening at the lower end/upper end of the air circulation channel, and the condensation is discharged from the drainage pipeline.
Further, the at least one temperature and humidity control unit adjusts the internal environment of the electrical equipment, and specifically includes:
by setting the air outlet direction of the internal circulation fan module,
one of the lower end opening of the air circulation channel of the upper temperature and humidity control unit and the upper end opening of the air circulation channel of the lower temperature and humidity control unit which are vertically adjacent in at least one overlapping circulation channel is set as an air inlet of the air circulation channel, and the other is set as an air outlet of the air circulation channel.
Further, at least one temperature and humidity control unit adjusts the internal environment of the electrical equipment, and specifically further comprises an overlapping dehumidification and condensation prevention program, comprising the following steps:
by setting the air outlet direction of the internal circulation fan module, one of the lower end opening of the air circulation channel of the upper temperature and humidity control unit and the upper end opening of the air circulation channel of the lower temperature and humidity control unit, which are vertically adjacent in at least one overlapping circulation channel, is set as an air inlet of the air circulation channel, and the other is set as an air outlet of the air circulation channel;
and enabling an upstream temperature and humidity control unit in the same overlapping circulating channel to execute the condensation preventing program, and enabling a downstream temperature and humidity control unit to execute the dehumidification condensation preventing program.
The invention provides a cascade type circulating channel cooling, dehumidifying and condensation preventing electrical equipment guaranteeing system with a plurality of temperature and humidity control units; each temperature and humidity control unit can independently realize refrigeration, cooling, dehumidification and condensation prevention, the temperature and humidity control unit detects the internal environment of the electric cabinet through the temperature and humidity sensing module and controls the temperature and humidity of air circulated in the electric cabinet, wherein the dehumidification can be realized by enabling the air to be refrigerated and cooled in the semiconductor temperature control module and discharging moisture of condensation; the semiconductor temperature control module and/or the auxiliary heating module are/is used for heating the air to be higher than the ambient dew point temperature so as to prevent the air from condensing in the electrical cabinet to realize condensation prevention. Particularly, the invention provides a cascade circulation channel formed by arranging two temperature and humidity control units up and down, which further improves the temperature and humidity regulation and condensation inhibition effects. The temperature and humidity control units can be uniformly arranged at intervals, so that temperature and humidity control of different areas of the whole electric cabinet is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure connection of the present invention;
FIG. 2 is a schematic view of the inside structure of an electrical cabinet door according to the present invention;
FIG. 3 is a schematic diagram of a temperature and humidity control unit;
FIG. 4 is a schematic view of the air circulation outside the electrical cabinet door;
FIG. 5 (a) is a schematic view of the air circulation inside the electrical cabinet door (one);
fig. 5 (b) is a schematic view of air circulation inside the electrical cabinet door (two);
fig. 5 (c) is a schematic view of air circulation inside the electrical cabinet door (third);
fig. 5 (d) is a schematic view of air circulation inside the electrical cabinet door (fourth);
in the drawings, the list of components represented by the various numbers is as follows:
a cabinet door 0; a temperature and humidity control unit 1; 1.1 parts of air guide port; auxiliary thermal module 1.2; a semiconductor temperature control module 1.3; an internal circulation fan module 1.4; a condensate port 1.5; a heat dissipation fan module 1.6; a temperature and humidity sensing module 2; an intelligent analysis environmental control module 3; a communication alarm module 4; a power supply module 5; a wiring master control board module 6; and a drain passage 7.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1 and 2, the cascade type circulating channel cooling, dehumidifying and condensation preventing electric equipment guaranteeing system comprises a temperature and humidity control unit 1 arranged in electric equipment, a temperature and humidity sensor 2 used for monitoring the inside of the electric equipment, an external temperature and humidity sensor used for monitoring the outside of the electric equipment, an intelligent analysis environmental control module 3, a power supply module 5 and a drainage pipeline 7; the temperature and humidity control unit 1 is provided with at least two. The invention is applied to the guarantee of the working environment inside electrical equipment such as an electrical cabinet and the like.
The temperature and humidity control unit 1, the temperature and humidity sensor 2 and the power module 5 are electrically connected with the intelligent analysis environmental control module 3; the temperature and humidity control unit 1 and the temperature and humidity sensor 2 are electrically connected with the power module 5;
the temperature and humidity control unit 1 comprises an air circulation channel which is vertically arranged and is only provided with openings at the upper end and the lower end, the opening at the upper end of the air circulation channel is an air guide opening 1.1 communicated with the interior of the electrical equipment, and the opening at the lower end of the air circulation channel is communicated with the interior of the electrical equipment through an internal circulation fan module 1.4;
the temperature and humidity control unit 1 comprises an auxiliary heating module 1.2 and a semiconductor temperature control module 1.3 which are used for adjusting the air temperature in the air circulation channel; the auxiliary heating module 1.2 is arranged in the air circulation channel; one surface of the semiconductor temperature control module 1.3 forms the inner wall of the air circulation channel; the other surface of the semiconductor temperature control module 1.3 forms the outer wall of the air circulation channel; the other side of the semiconductor temperature control module 1.3 is provided with a heat dissipation fan module 1.6 with the air outlet direction facing the outside of the electrical equipment;
the semiconductor temperature control module 1.3 can be composed of a plurality of groups of semiconductor refrigerating sheets in a compact mode and radiators arranged on two sides of the semiconductor refrigerating sheets. The direction of the current is generally set so that the refrigerating surface of the semiconductor refrigerating sheet faces into the electric cabinet, and the hot end surface faces out of the electric cabinet and passes through. The semiconductor refrigerating sheet uses the Peltier effect to refrigerate or heat, and under special conditions, the direction of current applied to the semiconductor refrigerating sheet is reversed, so that the heating end of the semiconductor temperature control module 1.3 faces the inside of the electrical equipment, and the semiconductor refrigerating sheet heats and heats the air circulated in the electrical cabinet.
The auxiliary heat module 1.2, the semiconductor temperature control module 1.3, the internal circulation fan module 1.4 and the heat dissipation fan module 1.6 are electrically connected with the intelligent analysis environmental control module 3 and the power supply module 5;
the lower end opening of the temperature and humidity control unit 1 is also connected with the input end of the drainage pipeline 7 through a condensate port 1.5; the output end of the drainage pipeline 7 is arranged outside the electrical equipment.
In practice, the invention is provided with the wiring total control board module 6 as a transfer station for integrating connecting lines, and the temperature and humidity control unit 1, the temperature and humidity sensing module 2, the intelligent analysis environmental control module 3 and the communication alarm module 4 are electrically connected with the power supply module 5 through the wiring total control board module 6. And the temperature and humidity control unit 1, the temperature and humidity sensing module 2 and the communication alarm module 4 are electrically connected with the intelligent analysis environmental control module 3 through the wiring main control board module 6.
Preferably, the system comprises at least two temperature and humidity sensors 2 arranged at different heights. Preferably, the system comprises at least two temperature and humidity control units 1 arranged at different heights.
Preferably, the system comprises at least two temperature and humidity control units 1 which are arranged adjacently up and down; at least two temperature and humidity control units 1 adjacent to each other up and down form an overlapping circulation channel. A plurality of continuous adjacent temperature and humidity control units are arranged on the same vertical line, and can also form a cascade circulating channel. One overlapping type circulating channel can enable a part of air to continuously flow in a plurality of air circulating channels in the overlapping type circulating channel, and the temperature and humidity control and condensation inhibition effects are improved.
The lower end opening of the air circulation channel of the upper temperature and humidity control unit 1 adjacent up and down in the overlapping circulation channel is arranged above the upper end opening of the air circulation channel of the lower temperature and humidity control unit 1 adjacent up and down.
Preferably, two overlapping circulation channels are symmetrically arranged on the left and right inside the cabinet door. The internal circulation fan module 1.4 is a bidirectional variable frequency fan, and can flexibly switch between air inlet and air outlet. As shown in fig. 2, four temperature and humidity control units 1 form a 2 x 2 array on the inner wall of the electric cabinet door 0, wherein vertically adjacent two overlapping circulation channels are formed, and two overlapping circulation channels are respectively arranged on the left and right sides.
Based on the guarantee system, the invention provides a method for guaranteeing cooling, dehumidifying and condensation-preventing electrical equipment of an overlapping type circulating channel, which comprises the following steps:
the temperature and humidity sensor 2 collects environmental data in the electrical equipment and sends the environmental data to the intelligent analysis environmental control module 3;
the temperature and humidity control unit 1 adjusts the internal environment of the electrical equipment.
Preferably, the at least one temperature and humidity control unit 1 adjusts the internal environment of the electrical equipment, specifically including an anti-condensation program:
the air in the electrical equipment is extracted through the internal circulation fan module 1.4 and enters the air circulation channel from the opening at the upper end/lower end of the air circulation channel, so that the air is heated by the auxiliary heating module 1.2 and/or the semiconductor temperature control module 1.3, and flows back into the electrical equipment from the opening at the lower end/upper end of the air circulation channel.
Preferably, the at least one temperature and humidity control unit 1 adjusts the internal environment of the electrical equipment, specifically including a dehumidification and condensation prevention program:
the air in the electrical equipment is extracted through the internal circulation fan module 1.4 and enters the air circulation channel from the upper end/lower end opening of the air circulation channel, so that the air is refrigerated by the semiconductor temperature control module 1.3, and then heated by the auxiliary heat module 1.2, and flows back into the electrical equipment from the lower end/upper end opening of the air circulation channel.
Preferably, the at least one temperature and humidity control unit 1 adjusts the internal environment of the electrical equipment, and specifically includes a cooling and dehumidifying program:
the air in the electrical equipment is extracted through the internal circulation fan module 1.4 and enters the air circulation channel from the opening at the upper end/lower end of the air circulation channel, so that the air is refrigerated through the semiconductor temperature control module 1.3, condensation is generated by refrigerating, cooling and condensing the semiconductor temperature control module 1.3, cooled cold air flows back into the electrical equipment from the opening at the lower end/upper end of the air circulation channel, and the condensation is discharged from the drainage pipeline 7.
Preferably, the at least one temperature and humidity control unit 1 adjusts the internal environment of the electrical equipment, and specifically includes a setting program of the cascade circulation channel:
by setting the air outlet direction of all the internal circulation fan modules 1.4 such that,
one of the lower end opening of the air circulation channel of the upper temperature and humidity control unit 1 and the upper end opening of the air circulation channel of the lower temperature and humidity control unit 1, which are vertically adjacent in at least one overlapping circulation channel, is provided with an air inlet of the air circulation channel, and the other is provided with an air outlet of the air circulation channel.
Through the scheme, the cascade flow of the air of the temperature and humidity control units 1 in the electrical cabinet is realized, the temperature and humidity control units 1 in the cascade circulation channel can firstly cool and dehumidify the air, and then heat the air to above the ambient temperature, so that the functions of cooling and dehumidifying and condensation prevention are realized, and the temperature and humidity control and condensation inhibition effect is further improved. Namely, as shown in fig. 5 (a) and 5 (d). Correspondingly, as shown in fig. 5 (b) and fig. 5 (c), the openings at the upper and lower ends adjacent to each other are air outlets or air inlets, and the temperature and humidity adjusting units 1 operate substantially independently.
Preferably, the at least one temperature and humidity control unit 1 adjusts the internal environment of the electrical equipment, and specifically further comprises an overlapping dehumidification and condensation prevention program, comprising the following steps:
by setting the air outlet direction of the internal circulation fan module 1.4, one of the lower end opening of the air circulation channel of the upper temperature and humidity control unit 1 and the upper end opening of the air circulation channel of the lower temperature and humidity control unit 1, which are vertically adjacent in at least one cascade circulation channel, is set as an air inlet of the air circulation channel, and the other is set as an air outlet of the air circulation channel;
the upstream temperature and humidity control unit 1 in the same cascade circulation channel is made to execute the condensation prevention program, and the downstream temperature and humidity control unit 1 is made to execute the dehumidification condensation prevention program.
The upstream and downstream are determined by the air flow direction, and the upstream temperature and humidity control unit 1 flows to the downstream upstream temperature and humidity control unit 1. Taking an example that two temperature and humidity control units 1 form an overlapping circulation channel, air in the electric equipment firstly enters an upstream temperature and humidity control unit 1 and then enters a downstream temperature and humidity control unit 1. In the example of overlapping circulation channels formed by three temperature and humidity control units 1, the first 2 or the first temperature and humidity control unit 1 may be the upstream temperature and humidity control unit 1, and the rest may be the downstream temperature and humidity control unit 1.
The invention adopts different working methods for reducing the temperature, relative humidity and/or absolute humidity inside the electrical equipment in the face of different temperature and humidity environments.
The first is the rapid refrigeration, condensation, drainage and dehumidification of the high-temperature and high-humidity environment, such as the refrigeration, cooling and dehumidification procedure described above; the second is to quickly form saturated steam aiming at the temperature rise of a continuous high-humidity environment, namely the complex anti-condensation program; the third is cascade dehumidification and condensation prevention program under low-temperature high-humidity environment; and the fourth is a dehumidification and condensation prevention program adopted in an environment with moderate temperature and large humidity.
The theoretical differences of the four above solutions for controlling the humidity in electrical equipment are: 1. decreasing absolute humidity (first); 2. reducing the relative humidity (second); 3. reduce relative humidity and provide an environment of reduced absolute humidity (third, fourth).
According to the method, different working modes are adopted under different temperature and humidity environments, and according to the Margarland formula, the national weather industry standard of the people's republic of China (QX/T50-2007) is the observation of the temperature and the humidity of the air of the 6 th part of the ground weather observation standard, and the wet air calculation method of the American society of heating, refrigeration and air-conditioning engineers is adopted. At higher humidity ambient conditions, the dew point temperature is lower and closer to ambient temperature. However, because the weather is always in variation, the temperature and the humidity are also always in variation, and in order to cope with the condensation prevention, dehumidification and cooling differentiation requirements of the outdoor electrical equipment cabinet under different working condition climatic environments, the invention adopts different treatment methods:
1) The first working condition is that under the condition of high-temperature high-humidity environment, all semiconductor temperature control modules 1.3 are arranged to perform refrigeration operation in all channels in the cabinet, the internal circulation fan module 1.4 automatically adjusts the wind speed and the wind outlet direction according to the data analysis result, and the concentrated cold quantity on the fins of the refrigeration surface rapidly reaches the dew point to realize high-efficiency condensation through the energy transfer of the cascade two-stage channels, so that the condensed water can greatly reduce the humidity in the cabinet after being discharged out of the cabinet through a self-drainage system. The operation mode can not only rapidly reduce the temperature of the circulating air in the electric cabinet, but also efficiently reduce the humidity in the cabinet, thereby achieving the anti-condensation effect. In operation, the temperature and humidity regulating unit 1 adopts a time-sharing and grouping mode to carry out rotation adjustment and energy conservation;
2) Under the environment quantity condition of low temperature continuous high humidity, the auxiliary thermal module 1.2 and the semiconductor temperature control module 1.3 are arranged to heat simultaneously, the internal circulation fan module 1.4 can be automatically adjusted to a high-speed state according to data analysis, and the internal circulation air is quickly heated and warmed through heat energy transmission of an overlapping channel, so that the temperature in the cabinet is higher than the environment temperature, the saturated water vapor quantity of the air in the cabinet is increased, and the mode does not exclude the water in the cabinet but can reduce the relative humidity of the environment quantity in the cabinet more quickly, so that the effect of inhibiting condensation is achieved. When the environment changes, the system can be automatically switched to other modes for effectively removing water to reduce the absolute humidity in the cabinet. In the operation mode, the temperature and humidity adjusting unit 1 adopts a time-sharing and grouping mode to carry out the rotation adjustment and energy saving;
3) As shown in fig. 5 (a), in the case of low temperature and high humidity environment, the air is difficult to re-condense and dew under the low temperature condition, so that the air is automatically adjusted to a high-speed state according to data analysis by the internal circulation fan module 1.4 of the lower temperature and humidity control unit 1, the air is sucked, the semiconductor temperature control module 1.3 is in a state that the heating end faces the inner side of the cabinet door 0 by setting the current direction, and the auxiliary heating module 1.2 is used for heating and heating the sucked air. And one part of the air after the temperature rise is returned to the electric equipment, and the other part is sucked into the upper temperature and humidity control unit in the same cascade circulation channel.
The semiconductor temperature control module 1.3 in the upper temperature and humidity control unit 1 is in a state that the refrigerating end face faces the inner side of the cabinet door 0, the condensation effect can be quickly formed on the refrigerating surface wing pieces by the accumulated cold quantity on the semiconductor temperature control module 1.3, and the condensation water formed on the semiconductor temperature control module 1.3 can be directly discharged outside the cabinet along with the drainage pipeline 7, so that the absolute humidity of the circulating air in the electric cabinet can be quickly reduced.
Then, the air after the condensation process of the semiconductor temperature control module 1.3 in the upper temperature and humidity control unit 1 is heated by the auxiliary thermal module 1.2 and finally flows back into the cabinet, so that the aim of reducing the absolute humidity and the relative humidity is fulfilled.
4) Finally, under the condition of moderate temperature and bigger humidity, the device can achieve the effects of condensation prevention and synchronous dehumidification only by using the temperature and humidity control unit 1 which operates independently under the working condition. The specific working method is that the air circulated in the electric cabinet is firstly cooled, condensed and dried through the semiconductor temperature control module 1.3 in the temperature and humidity control unit 1, then is properly heated through the auxiliary heat module 1.2 and then is released into the cabinet, the internal circulation fan module 1.4 can be automatically adjusted to low-speed or medium-speed operation according to data analysis, and the temperature of the circulated air is kept not to be lower than the ambient temperature in the cabinet. In operation, the temperature and humidity adjusting unit 1 adopts a time-sharing and grouping mode to carry out rotation adjustment and energy saving. At this time, the air is required to pass through the semiconductor temperature control module 1.3 and then the auxiliary thermal module 1.2 in the same temperature and humidity control unit by setting the air outlet direction of the fan.
In the invention, a ventilation type double-layer stainless steel outdoor electric cabinet with the specification size of 1800-800 is taken as an example, four sets of temperature and humidity control units 1 can be easily carried, the refrigerating capacity of each set of module can reach 400W, and the total effective refrigerating capacity of four sets of power modules can reach 1600W. The temperature and humidity control unit 1 can be arranged in a rectangle of 2 x 2 on the cabinet door 0 to form two parallel overlapped circulation channels. The overlapping type circulating channel is composed of the temperature and humidity control units which are arranged up and down, and the temperature and humidity control units are large in temperature and humidity difference in the vertical direction and small in temperature and humidity condition difference in the horizontal direction in the internal environment of the electrical equipment. By analogy, if the temperature and humidity conditions in the horizontal direction are greatly different, the cascade circulation channel can be formed by a plurality of temperature and humidity control units 1 in the horizontal direction, and a plurality of temperature and humidity sensor modules 2 are also arranged in the horizontal direction.
Not only can the temperature and humidity control in the cabinet be realized fast and effectively, but also enough redundant space is maintained. The intelligent analysis environmental control module finely controls the system when a single temperature and humidity control unit 1 fails, can timely inform a user of a specific module failure point, simultaneously shares work to other three sets of temperature and humidity control units 1, and adjusts effective operation modes of the three sets of temperature and humidity control units 1. The other three sets of temperature and humidity control units 1 have enough power conditions, and can completely meet the requirements of full-load operation. Such a rational design allows the user sufficient time to replace the components, ensuring that the equipment in the electrical cabinet can remain in high reliability operation for 7 x 24 hours.
In the description of the present specification, a description referring to terms "embodiment one", "embodiment two", "example", "specific example", or "some examples", etc., means that a specific method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, methods, apparatus, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The utility model provides an overlapping formula circulation channel cooling dehumidification anti-condensation electrical equipment guarantee system which characterized in that:
the system comprises a temperature and humidity control unit (1) arranged in the electrical equipment, a temperature and humidity sensor (2) used for monitoring the interior of the electrical equipment, an external temperature and humidity sensor used for monitoring the exterior of the electrical equipment, an intelligent analysis environmental control module (3), a power supply module (5) and a drainage pipeline (7); the temperature and humidity control unit (1) is provided with at least two temperature and humidity control units;
the temperature and humidity control unit (1) comprises an air circulation channel which is vertically arranged and is only provided with openings at the upper end and the lower end, the opening at the upper end of the air circulation channel is an air guide opening (1.1) communicated with the interior of the electrical equipment, and the opening at the lower end of the air circulation channel is communicated with the interior of the electrical equipment through an internal circulation fan module (1.4);
the temperature and humidity control unit (1) further comprises an auxiliary heating module (1.2) and a semiconductor temperature control module (1.3) which are used for adjusting the air temperature in the air circulation channel; the auxiliary heating module (1.2) is arranged in the air circulation channel; one surface of the semiconductor temperature control module (1.3) forms the inner wall of the air circulation channel; the other surface of the semiconductor temperature control module (1.3) forms the outer wall of the air circulation channel; a heat dissipation fan module (1.6) with the air outlet direction facing the outside of the electrical equipment is arranged on the other surface of the semiconductor temperature control module (1.3);
the intelligent analysis environmental control module (3) is electrically connected with the auxiliary thermal module (1.2), the semiconductor thermal control module (1.3), the internal circulation fan module (1.4), the heat dissipation fan module (1.6), the temperature and humidity sensor (2), the external temperature and humidity sensor and the power supply module (5) and is used for controlling the auxiliary thermal module (1.2), the semiconductor thermal control module (1.3), the internal circulation fan module (1.4), the heat dissipation fan module (1.6), the temperature and humidity sensor (2), the external temperature and humidity sensor and the power supply module (5);
the power module (5) is electrically connected with the auxiliary thermal module (1.2), the semiconductor temperature control module (1.3), the internal circulation fan module (1.4), the heat dissipation fan module (1.6), the temperature and humidity sensor (2), the external temperature and humidity sensor and the intelligent analysis environmental control module (3) and is used for supplying power to the auxiliary thermal module (1.2), the semiconductor temperature control module (1.3), the internal circulation fan module (1.4), the heat dissipation fan module (1.6), the temperature and humidity sensor (2), the external temperature and humidity sensor and the intelligent analysis environmental control module (3);
the lower end opening of the air circulation channel is also connected with the input end of the drainage pipeline (7) through a condensate port (1.5); the output end of the drainage pipeline (7) is arranged outside the electrical equipment.
2. The cascade circulation channel cooling, dehumidifying and anti-condensation electrical equipment protection system of claim 1, wherein:
the system comprises at least two temperature and humidity sensors (2) arranged at different heights in the electrical equipment and at least two temperature and humidity control units (1) arranged at different heights in the electrical equipment.
3. The cascade circulation channel cooling, dehumidifying and anti-condensation electrical equipment protection system of claim 2, wherein:
the system at least comprises a group of at least two temperature and humidity control units (1) which are arranged adjacently up and down;
at least two temperature and humidity control units (1) adjacent to each other up and down in the same group form an overlapping circulation channel;
the lower end opening of the air circulation channel of the upper temperature and humidity control unit (1) adjacent up and down in the overlapping circulation channel is arranged above the upper end opening of the air circulation channel of the lower temperature and humidity control unit (1).
4. The cascade connection type circulating channel cooling, dehumidifying and anti-condensation electrical equipment protection system according to claim 3, wherein: the internal circulation fan module (1.4) is a bidirectional variable frequency fan.
5. The method for guaranteeing the cascade type circulating channel cooling, dehumidifying and condensation-preventing electrical equipment is characterized by comprising the following steps of:
at least one temperature and humidity control unit (1) is used for adjusting the internal environment of the electrical equipment.
6. The method for guaranteeing the cascade circulating channel cooling, dehumidifying and condensation-preventing electrical equipment according to claim 5, wherein the method comprises the steps of,
the at least one temperature and humidity control unit (1) is used for adjusting the internal environment of the electrical equipment, and specifically comprises an anti-condensation program:
and the internal circulation fan module (1.4) is used for extracting air in the electrical equipment, and the air enters the air circulation channel from the upper end/lower end opening of the air circulation channel, so that the air is heated by the auxiliary thermal module (1.2) and/or the semiconductor temperature control module (1.3), and flows back into the electrical equipment from the lower end/upper end opening of the air circulation channel.
7. The method for guaranteeing the cascade circulating channel cooling, dehumidifying and condensation-preventing electrical equipment according to claim 6, wherein the method comprises the steps of,
the at least one temperature and humidity control unit (1) is used for adjusting the internal environment of the electrical equipment, and specifically comprises a dehumidification and condensation prevention program:
and the air in the electrical equipment is extracted through the internal circulation fan module (1.4) and enters the air circulation channel from the upper end/lower end opening of the air circulation channel, so that the air is cooled by the semiconductor temperature control module (1.3) in a way, and then the air is heated by the auxiliary heating module (1.2) in a way of being refluxed into the electrical equipment from the lower end/upper end opening of the air circulation channel.
8. The method for guaranteeing the cascade circulating channel cooling, dehumidifying and condensation-preventing electrical equipment according to claim 5, wherein the method comprises the steps of,
the at least one temperature and humidity control unit (1) is used for adjusting the internal environment of the electrical equipment and specifically comprises a refrigerating, cooling and dehumidifying program:
the internal circulation fan module (1.4) is used for extracting air in the electrical equipment, the air enters the air circulation channel from the upper end/lower end opening of the air circulation channel, the air is cooled by the semiconductor temperature control module (1.3) in a way, condensation is generated in the semiconductor temperature control module (1.3), the air flows back into the electrical equipment from the lower end/upper end opening of the air circulation channel, and the condensation is discharged from the drainage pipeline (7).
9. The method for guaranteeing the cooling, dehumidifying and condensation-preventing electrical equipment of the cascade circulating channel according to any one of claims 5 to 8, is characterized in that,
the at least one temperature and humidity control unit (1) adjusts the internal environment of the electrical equipment, and specifically comprises:
by setting the air outlet direction of all the internal circulation fan modules (1.4),
one of the lower end opening of the air circulation channel of the upper temperature and humidity control unit (1) and the upper end opening of the air circulation channel of the lower temperature and humidity control unit (1) which are vertically adjacent in at least one overlapping circulation channel is set as an air inlet of the air circulation channel, and the other is set as an air outlet of the air circulation channel.
10. The method for guaranteeing the cascade circulating channel cooling, dehumidifying and condensation-preventing electrical equipment according to claim 7, wherein,
at least one temperature and humidity control unit (1) adjusts the internal environment of the electrical equipment, and specifically further comprises an overlapping dehumidification anti-condensation program, and the method comprises the following steps:
by setting the air outlet direction of the internal circulation fan module (1.4), one of the lower end opening of the air circulation channel of the upper temperature and humidity control unit (1) adjacent up and down in at least one overlapping circulation channel and the upper end opening of the air circulation channel of the lower temperature and humidity control unit (1) is set as an air inlet of the air circulation channel, and the other is set as an air outlet of the air circulation channel;
and enabling an upstream temperature and humidity control unit (1) in the same cascade circulation channel to execute the condensation preventing program, and enabling a downstream temperature and humidity control unit (1) to execute the dehumidification condensation preventing program.
CN201810130091.9A 2018-02-08 2018-02-08 Cascade type circulating channel cooling, dehumidifying and condensation-preventing electric equipment guaranteeing system and method Active CN108281913B (en)

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