CN114362012A - Anti-condensation open type box chamber ventilation method and ventilation structure for electrical equipment - Google Patents
Anti-condensation open type box chamber ventilation method and ventilation structure for electrical equipment Download PDFInfo
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- CN114362012A CN114362012A CN202210042468.1A CN202210042468A CN114362012A CN 114362012 A CN114362012 A CN 114362012A CN 202210042468 A CN202210042468 A CN 202210042468A CN 114362012 A CN114362012 A CN 114362012A
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Abstract
The invention discloses a ventilation method and a ventilation structure of an open type box chamber for preventing condensation of electrical equipment, wherein the open type box chamber comprises an electrical equipment base chamber and an electrical equipment chamber, a first ventilation hole is formed in the upper part of the electrical equipment base chamber, second ventilation holes are respectively formed in the upper part and the lower part of the electrical equipment chamber, and a ventilation device is further arranged on the upper part of the electrical equipment chamber. By adopting the ventilation method and the ventilation structure, the energy consumption is avoided, the water vapor is diluted in a ventilation mode before condensation occurs, the retention time and the attachment time are reduced until the water vapor is discharged, the condensation caused by liquefaction of the water vapor is effectively avoided, the structure is simple, the operation is convenient, the maintenance is avoided, the practicability is high, and the ventilation method and the ventilation structure are suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of control of an operating environment of electrical equipment, in particular to a method and a structure for ventilating an open type box chamber for preventing condensation of the electrical equipment.
Background
In the urban distribution network of cabling, in the modular power distribution station construction project, electrical equipment basic room and outdoor underground cable trench connection, because of the heat of trench geothermol power and cable work release, moist air constantly receives the heating and gets into in the equipment basic room in the cable channel, increase along with time, the indoor steam density of electrical equipment basic room is very big, because indoor steam flows very little, just constantly the gathering forms the condensation and adheres to on the cable, serious corrosion cable head position, cause cable head position discharge to lead to the conflagration. Meanwhile, because the electrical equipment chamber is in a semi-closed or fully-closed condition, the convection exchange of the air inside and outside the electrical equipment chamber cannot be effectively organized, the air inside the chamber is very humid, the density of the water vapor is high, and the water vapor in the chamber flows very little and is continuously gathered into water drops to be attached to the electrical equipment, namely condensation. The condensation is easy to corrode and damage equipment, and also easy to cause serious potential safety hazards such as short circuit fire and the like. In addition, especially in the environment of a cold weather, because the indoor air temperature of the electrical equipment is high, the outdoor temperature is low, and at the critical surface of the internal air and the external air, indoor water vapor is quickly frozen and liquefied into condensation which is attached to the surface of the equipment or the surface of the inner wall, so that the equipment is corroded, the insulation strength of the equipment is also reduced, and the potential safety hazard is very serious.
The traditional anti-condensation control mode is divided into two modes of manual control and dehumidifier installation, but the traditional anti-condensation control mode has defects. The first mode is to open the casing of the equipment by manpower, so that the equipment is exposed to the sun to remove the condensation, the method is simple and effective, but cannot be continued, a large amount of manpower is required to be invested, and the potential safety hazard of pedestrians is easily brought under the condition that the enclosure box body is opened, so that the method is not feasible. The second mode is to manually control whether the corresponding dehumidifying device needs to be opened or not through the dehumidifier. The disadvantages of this approach are three: firstly, the dehumidifier dehumidifies an incompletely sealed space, indoor negative pressure is generated by air in the dehumidified space due to dehumidification, outdoor humid air can bring moisture into the dehumidified space again quickly in order to balance the indoor negative pressure, and therefore the dehumidifier cannot really dehumidify; secondly, the dehumidifier needs manual control and can not automatically control the start and stop of the dehumidifier according to actual requirements on site; thirdly, the dehumidifier can work under the condition of consuming electric energy, so that the work of the dehumidifier causes energy waste for a long time.
Disclosure of Invention
The invention aims to solve the technical problems in the background art, and aims to solve the problems that in the operation process of electrical equipment, ambient air is heated due to heat generated by the electrical equipment, so that water vapor is formed to corrode the cable and the equipment, the water vapor is attached to a weak position of the cable, the electrical equipment and the inner wall of an electrical equipment chamber for a long time after being liquefied, the cable and the equipment are corroded, the insulation strength of a power cable is reduced, and potential safety hazards are serious.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a ventilation method of an open type box chamber for preventing condensation of electrical equipment, wherein the open type box chamber comprises an electrical equipment base chamber and an electrical equipment chamber, the electrical equipment chamber is provided with the electrical equipment, a plurality of first ventilation holes are arranged in the upper side wall of the electrical equipment base chamber at a height position which is not flooded by water, a plurality of second ventilation holes are respectively arranged on the upper side wall and the lower side wall of the electrical equipment chamber, and a ventilation device is also arranged on the upper part of the electrical equipment chamber; the control mode is that the air in the nature is utilized to respectively carry out convection and heat exchange with the air in the electrical equipment basic room and the electrical equipment room when flowing through, thereby the temperature difference between the air in the electrical equipment basic room and the electrical equipment room and the air outside is continuously reduced, when the temperature difference is continuously reduced and approaches to zero, the indoor water vapor is removed and diluted through the extrusion of the external air, the formation of a liquefaction critical surface caused by quick freezing of the humid gas in the indoor air is avoided, the liquefaction process is prevented by reducing the temperature difference, and the condensation is eliminated.
Further, the anti-condensation open type box chamber ventilation method for the electrical equipment, provided by the invention, comprises the following specific control modes of the anti-condensation of the electrical equipment basic chamber: when air in the nature circulates, a windward side is formed on the front side of the electrical equipment basic chamber as the front side, positive wind pressure generated by the windward side enters the electrical equipment basic chamber through a first vent hole arranged on the front side of the electrical equipment basic chamber, the air flow in the electrical equipment basic chamber is compressed and accelerated by the positive wind pressure entering from the windward side, and convection and heat exchange are carried out between the air and hot air in the electrical equipment basic chamber, so that the air in the electrical equipment basic chamber is discharged by the first vent hole in the leeward side opposite to the windward side, the temperature and humidity in the electrical equipment basic chamber are reduced, the water vapor residence time is reduced, the internal and external temperature difference of the electrical equipment basic chamber is continuously reduced, when the temperature difference is reduced to be close to zero, the water vapor in the electrical equipment basic chamber is discharged and diluted, and the phenomenon that the wet gas in the air in the electrical equipment basic chamber forms a liquefaction critical surface due to quick freezing is avoided, the condensation is eliminated by reducing the temperature difference to prevent the liquefaction process.
Further, the method for controlling ventilation of the open type electrical equipment room for preventing condensation of the electrical equipment room comprises the following specific control modes: firstly, when air in the nature circulates, the air enters along a second vent hole at the lower part of an electrical equipment chamber, flows in the electrical equipment chamber through the entered air, and carries out convection and heat exchange with the internal hot air of the electrical equipment chamber, so that the internal hot air of the electrical equipment chamber is continuously discharged from the second vent hole at the upper part, the indoor and outdoor air circulation exchange of the electrical equipment is effectively organized to discharge and dilute the indoor water vapor and humidity of the electrical equipment, the liquefaction of the humid gas in the indoor air of the electrical equipment due to quick freezing is avoided, the internal and external temperature difference approaches zero by reducing the indoor and outdoor temperature difference of the electrical equipment, and the liquefaction process is prevented by reducing the temperature difference, so that condensation is eliminated; secondly, when air in the nature circulates, the windward side of the electrical equipment chamber is taken as the front side, positive wind pressure generated by the windward side enters the electrical equipment chamber through a second ventilation hole arranged on the front side of the electrical equipment chamber, convection and heat exchange are carried out between the air in the electrical equipment chamber and the positive wind pressure entering from the windward side, the positive wind pressure entering from the windward side is used for pressing and accelerating the air flow in the electrical equipment chamber, and the convection and heat exchange are carried out with hot air in the electrical equipment chamber, so that the air in the electrical equipment chamber is discharged from the second ventilation hole on the leeward side opposite to the windward side, the temperature in the electrical equipment chamber is reduced, the retention time of water vapor is reduced, the temperature difference between the inside and the outside of the electrical equipment chamber is reduced continuously, when the temperature difference is reduced to zero, the moisture in the electrical equipment chamber is discharged and diluted, and the liquefaction caused by quick freezing of the moisture in the air in the electrical equipment chamber is avoided, when the temperature difference between the inside and the outside of the electric equipment is reduced and the temperature difference between the inside and the outside approaches zero, the temperature difference is reduced to prevent the liquefaction process, so that condensation is eliminated; meanwhile, the ventilation device arranged on the upper part of the electrical equipment chamber is utilized to accelerate the air circulation of the electrical equipment chamber, so that the temperature in the electrical equipment chamber is reduced, the water vapor retention time is shortened, and the temperature difference between the inside and the outside of the electrical equipment chamber is continuously reduced.
According to another aspect of the present invention, there is provided a ventilation structure for an open cabinet for preventing condensation of electrical equipment, the open cabinet including an electrical equipment base room and an electrical equipment room, the electrical equipment room being provided in the electrical equipment base room, a distribution device being disposed in the electrical equipment room, a plurality of first ventilation holes being opened in a height position of an upper side wall of the electrical equipment base room so as not to be flooded with water, a plurality of second ventilation holes being opened in upper and lower side walls of the electrical equipment room, respectively, a ventilation device being further provided in an upper portion of the electrical equipment room, and air passing through the first ventilation holes, the second ventilation holes, and the ventilation device being provided so as to be introduced into the corresponding electrical equipment base room and the electrical equipment room from the first ventilation holes and the second ventilation holes when air in nature is circulated, and carry out convection current and heat exchange with the indoor air, through outside air extrusion, get rid of and dilute indoor steam, reduce dwell time, avoid in the indoor air humid gas to produce the liquefaction process because of receiving the quick-freeze, through reducing the indoor outer difference in temperature of electrical equipment, make the inside and outside difference in temperature approach zero, utilize the difference in temperature to prevent to produce the process of liquefaction to eliminate the condensation.
Furthermore, according to the ventilation structure of the open type box chamber for preventing condensation of the electrical equipment, which is disclosed by the invention, a plurality of first ventilation holes are formed in a plurality of side surfaces of the electrical equipment base chamber, and a plurality of second ventilation holes are formed in the upper part and the lower part of the plurality of side surfaces of the electrical equipment chamber; the air interchanger is arranged on the upper parts of the side walls of the electrical equipment room, and the air interchanger and the second vent hole positioned on the upper part of the electrical equipment room are positioned in the same vertical plane.
Further, according to the ventilation structure of the open type box chamber for preventing condensation of the electrical equipment, the rain-proof device is arranged on the outer sides of the first ventilation hole and the second ventilation hole, and the blocking net for preventing small animals from entering is arranged on the inner sides of the first ventilation hole and the second ventilation hole.
The invention relates to an open type box room ventilation method and a ventilation structure for preventing condensation of electrical equipment, which have the working principle that: utilize the air in the nature to circulate the exchange constantly automatically to make the indoor air of electrical equipment basic room and electrical equipment carry out convection current and heat exchange with the air in the nature respectively, thereby make the indoor outer difference in temperature constantly dwindle, when this difference in temperature constantly dwindles to zero approach, the moisture in the room air has just avoided liquefying because of receiving the quick-freeze, has eliminated the liquefaction process of moisture in the room air, has just eliminated the condensation. Meanwhile, positive wind pressure generated on the windward side of the box chamber and negative wind pressure generated on the leeward side of the box chamber during air circulation are utilized, the positive wind pressure on the windward side enters the room through the ventilation holes on the windward side, indoor air flow is extruded and accelerated, indoor temperature is reduced, water vapor residence time is shortened, indoor water vapor is removed and diluted, and condensation is eliminated.
Compared with the prior art, the anti-condensation open type box chamber ventilation method and the ventilation structure for the electrical equipment have the beneficial effects that: because be equipped with corresponding first ventilation hole respectively in electrical equipment basic room and electrical equipment room, second ventilation hole and breather, the positive wind pressure that produces when utilizing the circulation of air carries out convection current and heat exchange with indoor air, and the extrusion flows with indoor air with higher speed, thereby reduce indoor outer difference in temperature, reduce steam dwell time, get rid of and dilute indoor steam, utilize and reduce the process that the difference in temperature prevented to produce the liquefaction, thereby eliminate the condensation, whole process does not have the energy consumption, make steam get rid of through the ventilation mode before taking place the condensation, through taking the anti-condensation measure before the condensation takes place, effectively avoid steam to produce the condensation because of the liquefaction, and the steam-air condensation device has simple structure, and convenient for implementation, does not consume the energy, the process is maintenance-free, and the practicality is strong, and is suitable for popularization and application.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic diagram of the front and back structures of the present invention;
FIG. 3 is a schematic view of the right and left side structures of the present invention;
FIG. 4 is a schematic view of the cross-sectional structure taken along the line A-A in FIG. 1.
Shown in the figure: 1-electrical equipment basic room, 11-first vent hole, 2-electrical equipment room, 21-second vent hole and 22-ventilation device.
Detailed Description
To further illustrate the concepts of the present invention, embodiments of the present invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 to 4, the ventilation method for the open cabinet of the electrical equipment for preventing condensation according to the invention comprises an electrical equipment base room 1 and an electrical equipment room 2, an electric device is disposed in the electric device chamber 2, a plurality of first ventilation holes 11 are opened in the upper side wall of the electric device base chamber 1 at a height position not flooded by water, and a plurality of second ventilation holes 21 are respectively formed on the upper and lower side walls of the electric equipment room 2, and a ventilation device 22 is provided at an upper portion of the electric equipment room 2, the ventilation method is to prevent the accumulation of geothermal heat and moisture in the electric equipment base room 1 to heat the air in the electric equipment room, meanwhile, the indoor air is continuously heated to prevent the air in the electrical equipment room 2 from being condensed due to the heat released by the power distribution equipment during working, so that the moist gas in the air is liquefied; the control mode is that the air in the nature is utilized to respectively carry out convection and heat exchange with the air in the electrical equipment basic room 1 and the electrical equipment room 2 when flowing through, thereby the temperature difference between the air in the electrical equipment basic room 1 and the electrical equipment room 2 and the outside air is continuously reduced, when the temperature difference is continuously reduced to zero, the indoor water vapor is removed and diluted through the extrusion of the outside air, the liquefaction critical surface formed by the moisture gas in the indoor air due to quick freezing is avoided, the liquefaction process is prevented from being generated by reducing the temperature difference, and the condensation is eliminated.
Further, the anti-condensation open type box chamber ventilation method for the electrical equipment, provided by the invention, comprises the following specific control modes of the anti-condensation of the electrical equipment basic chamber 1: when air in the nature circulates, the windward side of the electrical equipment base chamber 1 is taken as the front side, positive wind pressure generated by the windward side enters the electrical equipment base chamber 1 through the first vent hole 11 arranged on the front side of the electrical equipment base chamber 1, the positive wind pressure entering from the windward side is used for compressing and accelerating the air flow in the electrical equipment base chamber 1, convection and heat exchange are carried out between the positive wind pressure and hot air in the electrical equipment base chamber 1, so that the air in the electrical equipment base chamber 1 is discharged through the first vent hole 11 on the leeward side opposite to the windward side, the temperature and the humidity in the electrical equipment base chamber 1 are reduced, the retention time of water vapor is reduced, the temperature difference between the electrical equipment base chamber 1 and the inside and outside is reduced, when the temperature difference is reduced to be almost zero, the water vapor in the electrical equipment base chamber 1 is discharged and diluted, and the phenomenon that humid gas in the air in the electrical equipment base chamber 1 is quickly frozen to form a liquefied critical surface is avoided, the condensation is eliminated by reducing the temperature difference to prevent the liquefaction process;
the specific control mode of the electrical equipment room 2 for preventing condensation is as follows: firstly, when air in the nature circulates, the air enters along the second vent hole 21 at the lower part of the electrical equipment chamber 2, flows in the electrical equipment chamber 2 through the entered air, and carries out convection and heat exchange with the internal hot air in the electrical equipment chamber 2, so that the hot air in the electrical equipment chamber 2 is continuously discharged from the second vent hole 21 at the upper part, the air circulation and exchange between the inside and the outside of the electrical equipment chamber 2 are effectively organized, the water vapor and the humidity in the electrical equipment chamber 2 are discharged and diluted, the liquefaction of the humid gas in the air in the electrical equipment chamber 2 caused by quick freezing is avoided, the temperature difference between the inside and the outside of the electrical equipment chamber 2 is reduced to be close to zero, and the liquefaction process is prevented by reducing the temperature difference, so that condensation is eliminated; secondly, when air in the nature circulates, the windward side of the electrical equipment chamber 2 is taken as the front side, positive wind pressure generated by the windward side enters the electrical equipment chamber 2 through a second ventilation hole 21 arranged on the front side of the electrical equipment chamber 2, convection and heat exchange are carried out between the air in the electrical equipment chamber and the positive wind pressure entering from the windward side, the air in the electrical equipment chamber 2 is compressed and accelerated by the positive wind pressure entering from the windward side, and the air and hot air in the electrical equipment chamber 2 are subjected to convection and heat exchange, so that the air in the electrical equipment chamber 2 is discharged from the second ventilation hole 21 on the leeward side opposite to the windward side, the temperature in the electrical equipment chamber 2 is reduced, the retention time of water vapor is shortened, the temperature difference between the inside and the outside of the electrical equipment chamber 2 is reduced continuously, and when the temperature difference is reduced to be close to zero, the water vapor in the electrical equipment chamber 2 is discharged and diluted, the liquefaction of the humid gas in the air in the electrical equipment room 2 caused by quick freezing is avoided, and when the temperature difference between the inside and the outside of the electrical equipment room 2 is reduced and the temperature difference between the inside and the outside approaches zero, the liquefaction process is prevented by utilizing the reduced temperature difference, so that condensation is eliminated; meanwhile, the ventilation device 22 arranged at the upper part of the electrical equipment chamber 2 is utilized to accelerate the air circulation of the electrical equipment chamber 2, so that the temperature in the electrical equipment chamber 2 is reduced, the retention time of water vapor is shortened, and the temperature difference between the inside and the outside of the electrical equipment chamber 2 is continuously reduced.
According to another object of the present invention, there is provided a ventilation structure of an open cabinet for preventing condensation of electrical equipment, the open cabinet including an electrical equipment base room 1 and an electrical equipment room 2, the electrical equipment room 2 being provided in the electrical equipment base room 1, a distribution equipment being disposed in the electrical equipment room 2, a plurality of first ventilation holes 11 being opened at a height position not submerged in water in an upper side wall of the electrical equipment base room 1, a plurality of second ventilation holes 21 being opened in upper and lower side walls of the electrical equipment room 2, respectively, a ventilation device 22 being further provided in an upper portion of the electrical equipment room 2, air in nature being circulated through the first ventilation holes 11, the second ventilation holes 21, and the ventilation device 22, being introduced into the electrical equipment base room 1 and the electrical equipment room 2 from the first ventilation holes 11 and the second ventilation holes 21, and carries out convection and heat exchange with the indoor air, extrudes, gets rid of and dilutes indoor steam through the outside air, reduces dwell time, avoids in the indoor air humid gas to produce the liquefaction process because of receiving the quick-freeze, through reducing the difference in temperature inside and outside electrical equipment room 2, makes the difference in temperature inside and outside close to zero, utilizes to reduce the difference in temperature and prevents to produce the process of liquefaction to eliminate the condensation.
Further, according to the ventilation structure of the open type box chamber for preventing condensation of the electrical equipment, a plurality of first ventilation holes 11 are formed in a plurality of side surfaces of the electrical equipment base chamber 1, and a plurality of second ventilation holes 21 are formed in a plurality of side surfaces of the upper portion and the lower portion of the plurality of side surfaces of the electrical equipment chamber 2; the ventilator 22 is attached to the upper portions of the plurality of side walls of the electrical equipment room 2, and the ventilator 22 is positioned in the same vertical plane as the second ventilation hole 21 positioned in the upper portion of the electrical equipment room 2.
Further, according to the ventilation structure of the open type box chamber for preventing condensation of the electrical equipment, a rain-proof device is arranged on the outer sides of the first ventilation hole 11 and the second ventilation hole 21, and a blocking net for preventing small animals from entering is arranged on the inner sides of the first ventilation hole 11 and the second ventilation hole 21. Can prevent effectively through the separation net that sets up that toy or other debris from getting into in electrical equipment basic room 1 and the electrical equipment room 2, through taking corresponding rain-proof water installation and separation net, prevent the striking that drops of rainwater invasion and attack and foreign matter to influence distribution equipment's normal use. Wherein rain-proof water installation and block net all belong to daily protective apparatus commonly used among the prior art, can purchase in the market and obtain, can select according to the ventilation hole size of difference, as long as can satisfy the operation requirement, do not describe here in detail.
The invention relates to an open type box room ventilation method and a ventilation structure for preventing condensation of electrical equipment, which have the working principle that: utilize the air in the nature to circulate the exchange constantly automatically to make the indoor air of electrical equipment basic room and electrical equipment carry out convection current and heat exchange with the air in the nature respectively, thereby make the indoor outer difference in temperature constantly dwindle, when this difference in temperature constantly dwindles to zero approach, the moisture in the room air has just avoided liquefying because of receiving the quick-freeze, has eliminated the liquefaction process of moisture in the room air, has just eliminated the condensation. Meanwhile, positive wind pressure generated on the windward side of the box chamber and negative wind pressure generated on the leeward side of the box chamber during air circulation are utilized, the positive wind pressure on the windward side enters the room through the ventilation holes on the windward side, indoor air flow is extruded and accelerated, indoor temperature is reduced, water vapor residence time is shortened, indoor water vapor is removed and diluted, and condensation is eliminated.
In the practical application process, by adopting the anti-condensation open type box chamber ventilation method and the ventilation structure for the electrical equipment, the electrical equipment base chamber 1 and the electrical equipment chamber 2 can work jointly or separately and independently, wherein the electrical equipment base chamber 1 is communicated with a cable channel, only cables are arranged in the electrical equipment base chamber, no electrical equipment is arranged in the electrical equipment base chamber, and the heat in the electrical equipment base chamber 1 mainly comprises geothermal heat in the cable channel and heat generated by the operation of the cables. In contrast, the electrical equipment room 2 is provided with electrical equipment, and the electrical equipment generates a large amount of heat during operation.
Because the first vent hole 11 is arranged on the wall at the height position which is not flooded by water above the electrical equipment basic chamber 1, and the second vent holes 21 are respectively arranged on the walls at the lower part and the upper part of the enclosing wall of the electrical equipment chamber 2, the first vent hole 11 of the electrical equipment basic chamber 1 can effectively organize the air in the chamber and the air in the natural world to carry out automatic circulation and exchange by utilizing the arranged first vent hole 11, the second vent hole 21 and the ventilation device 22; the second ventilation holes 21 on the wall of the electric equipment room 2 can effectively organize the automatic circulation and exchange of the air in the room and the nature. By exchanging air in the electrical equipment base room 1 with air outside, moisture in the room can be released to the nature, and the temperature in the electrical equipment base room 1 can be reduced. And exchange the circulation with the air of external world through the air in the electrical equipment room 2, can effectively get rid of moisture or steam in this indoor air, reduce this indoor, outside difference in temperature simultaneously, exchange often through automatic, this indoor outer difference in temperature can tend to zero gradually, when indoor outer difference in temperature tends to zero, indoor moisture or steam just can not receive the quick-freeze and produce the liquefaction process, has eliminated the liquefaction process of steam, has just also eliminated the condensation. In addition, as the rain-proof devices are arranged on the outer sides of the first vent hole 11 and the second vent hole 21, and the blocking nets are arranged on the inner sides of the first vent hole 11 and the second vent hole 21, the rain-proof devices and the blocking nets are adopted correspondingly, so that the rainwater is prevented from invading and foreign matters are prevented from falling and impacting, and the normal use of the power distribution equipment is influenced.
In summary, the ventilation method and the ventilation structure of the invention utilize the positive wind pressure generated during air circulation to perform convection and heat exchange with indoor air, and extrude and accelerate the indoor air flow, thereby reducing the indoor temperature, reducing the retention time of water vapor, and removing and diluting the indoor water vapor. Utilize the difference in temperature to prevent the process that produces the liquefaction critical surface to eliminate the condensation, whole process does not have the energy consumption, makes steam get rid of through the ventilation mode before taking place the condensation, takes anti-condensation measure through taking before the condensation takes place, reduces dwell time, effectively avoids steam to produce the condensation because of the liquefaction, has simple structure, does not consume the energy, and the process is non-maintaining, and convenient operation, its practicality is strong, is fit for popularizing and applying.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art, and any modifications, equivalents, improvements, etc. made by using the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An open type box chamber ventilation method for preventing condensation of electrical equipment is characterized in that: the open type box chamber comprises an electrical equipment basic chamber (1) and an electrical equipment chamber (2), an electrical device is disposed in the electrical device chamber (2), a plurality of first ventilation holes (11) are opened in the upper side wall of the electrical device base chamber (1) at a height position not flooded by water, a plurality of second ventilation holes (21) are respectively arranged on the side walls of the upper part and the lower part of the electrical equipment chamber (2), and a ventilation device (22) is arranged on the upper part of the electric equipment chamber (2), the ventilation method is used for heating the air in the electric equipment chamber in order to prevent the accumulation of geothermal heat and moisture in the electric equipment basic chamber (1), meanwhile, the indoor air is continuously heated due to the heat released by the power distribution equipment when the air in the electrical equipment room (2) works, so that the moisture gas in the air is liquefied to generate condensation; the control mode is that the air in the nature is utilized to carry out convection and heat exchange with the air in the electrical equipment basic room (1) and the electrical equipment room (2) respectively when flowing through, thereby the temperature difference between the air in the electrical equipment basic room (1) and the electrical equipment room (2) and the outside air is reduced continuously, when the temperature difference is reduced to zero, the water vapor in the room is removed and diluted through the extrusion of the outside air, the liquefaction critical surface formed by the moisture gas in the room air due to quick freezing is avoided, the liquefaction process is prevented by reducing the temperature difference, and the condensation is eliminated.
2. The electrical equipment condensation-proof open box ventilation method according to claim 1, characterized in that the electrical equipment base room (1) condensation-proof is specifically controlled in the following way: when air in nature circulates, the windward side of the electrical equipment basic chamber (1) is taken as the front side, positive wind pressure generated by the windward side enters the electrical equipment basic chamber (1) through a first vent hole (11) arranged on the front side of the electrical equipment basic chamber (1), the air flowing in the electrical equipment basic chamber (1) is compressed and accelerated by the positive wind pressure entering from the windward side, convection and heat exchange are carried out between the positive wind pressure and hot air in the electrical equipment basic chamber (1), the air in the electrical equipment basic chamber (1) is discharged through the first vent hole (11) on the leeward side opposite to the windward side, so that the temperature and humidity in the electrical equipment basic chamber (1) are reduced, the retention time of water vapor is reduced, the temperature difference between the inside and the outside of the electrical equipment basic chamber (1) is reduced continuously, and when the temperature difference is reduced and approaches zero, the water vapor in the electrical equipment basic chamber (1) is discharged and diluted, the liquefaction critical surface formed by quickly freezing the humid gas in the air in the electrical equipment basic chamber (1) is avoided, and the liquefaction process is prevented by reducing the temperature difference, so that condensation is eliminated.
3. The electrical equipment condensation-prevention open-type cabinet ventilation control method according to claim 1, characterized in that the electrical equipment room (2) condensation prevention is specifically controlled in a manner that: firstly, when air in the nature circulates, the air enters along a second vent hole (21) at the lower part of an electrical equipment chamber (2), flows in the electrical equipment chamber (2) through the entered air and carries out convection and heat exchange with the internal hot air of the electrical equipment chamber (2), so that the hot air in the electrical equipment chamber (2) is continuously discharged from the second vent hole (21) at the upper part, the internal and external air circulation and exchange of the electrical equipment chamber (2) are effectively organized, water vapor and humidity in the electrical equipment chamber (2) are discharged and diluted, the liquefaction of damp gas in the air in the electrical equipment chamber (2) caused by quick freezing is avoided, and when the internal and external temperature difference approaches zero through reducing the internal and external temperature difference of the electrical equipment chamber (2), the liquefaction process is prevented by reducing the temperature difference, so that condensation is eliminated; secondly, when air in the nature circulates, the windward side of the electrical equipment chamber (2) is taken as the front side, positive wind pressure generated by the windward side enters the electrical equipment chamber (2) through a second ventilation hole (21) arranged on the front side of the electrical equipment chamber (2), convection and heat exchange are carried out between the air in the electrical equipment chamber and the positive wind pressure entering from the windward side, the positive wind pressure entering from the windward side is used for pressing and accelerating the air flow in the electrical equipment chamber (2), and the convection and heat exchange are carried out with hot air in the electrical equipment chamber (2), so that the air in the electrical equipment chamber (2) is discharged from the second ventilation hole (21) on the leeward side opposite to the windward side, the temperature in the electrical equipment chamber (2) is reduced, the water vapor residence time is reduced, and the internal and external temperature difference of the electrical equipment chamber (2) is reduced to be close to zero, the condensation is eliminated by removing and diluting the water vapor in the electrical equipment chamber (2), avoiding the liquefaction of the humid gas in the air in the electrical equipment chamber (2) caused by quick freezing, and reducing the temperature difference between the inside and the outside of the electrical equipment chamber (2) to enable the temperature difference to approach zero, and preventing the liquefaction process by utilizing the reduced temperature difference; meanwhile, the ventilation device (22) arranged at the upper part of the electrical equipment chamber (2) is utilized to accelerate the air circulation of the electrical equipment chamber (2), so that the temperature in the electrical equipment chamber (2) is reduced, the retention time of water vapor is shortened, and the temperature difference between the inside and the outside of the electrical equipment chamber (2) is continuously reduced.
4. The utility model provides an electrical equipment prevents ventilation structure of open case room of condensation which characterized in that: the open type box chamber comprises an electrical equipment basic chamber (1) and an electrical equipment chamber (2), the electrical equipment chamber (2) is arranged on the electrical equipment basic chamber (1), distribution equipment is arranged in the electrical equipment chamber (2), a plurality of first vent holes (11) are arranged at the height position of the side wall of the upper part of the electrical equipment basic chamber (1) which is not flooded by water, a plurality of second vent holes (21) are respectively arranged on the side wall of the upper part and the side wall of the lower part of the electrical equipment chamber (2), a ventilation device (22) is further arranged on the upper part of the electrical equipment chamber (2), and air in the natural world enters the corresponding electrical equipment basic chamber (1) and the electrical equipment chamber (2) through the first vent holes (11), the second vent holes (21) and the ventilation device (22), and carries out convection and heat exchange with the indoor air, extrudes, removes and dilutes the indoor water vapor through the outside air, reduces the residence time, avoids the liquefaction process of the humid gas in the indoor air caused by quick freezing, and prevents the liquefaction process by utilizing the temperature difference when the temperature difference between the inside and the outside approaches to zero by reducing the temperature difference between the inside and the outside of the electrical equipment room (2), thereby eliminating the condensation.
5. The ventilation structure of an open cabinet for preventing condensation of electric equipment according to claim 4, wherein: a plurality of first ventilation holes (11) are formed in a plurality of side surfaces of the electrical equipment basic chamber (1), a plurality of second ventilation holes (21) are formed in a plurality of side surfaces of the upper portion and the lower portion of the plurality of side surfaces of the electrical equipment chamber (2), and the ventilation device (22) is installed on the upper portion of a plurality of side walls of the electrical equipment chamber (2); the ventilation device (22) and a second ventilation hole (21) positioned at the upper part of the electrical equipment chamber (2) are positioned in the same vertical plane.
6. The ventilation structure of an open cabinet for preventing condensation of electric equipment according to claim 4, wherein: and a blocking net for preventing small animals from entering is arranged on the inner sides of the first vent hole (11) and the second vent hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210042468.1A CN114362012A (en) | 2022-01-14 | 2022-01-14 | Anti-condensation open type box chamber ventilation method and ventilation structure for electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210042468.1A CN114362012A (en) | 2022-01-14 | 2022-01-14 | Anti-condensation open type box chamber ventilation method and ventilation structure for electrical equipment |
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| CN114362012A true CN114362012A (en) | 2022-04-15 |
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| CN (1) | CN114362012A (en) |
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| CN113839315A (en) * | 2021-10-29 | 2021-12-24 | 上海平高天灵开关有限公司 | Prevent box switching station of condensation |
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| DE19509312A1 (en) * | 1995-03-15 | 1996-09-19 | Bree Hartmut | Room cooling method using heat exchangers |
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| CN109193420A (en) * | 2018-09-11 | 2019-01-11 | 常州工学院 | One kind is for the anti-condensation system of cooling and its control method in outdoor ring main unit |
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