CN113597231A - Self-adaptive anti-condensation environment control device of open type control cabinet - Google Patents
Self-adaptive anti-condensation environment control device of open type control cabinet Download PDFInfo
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Abstract
The invention belongs to the technical field of temperature self-adaptive condensation resistance, and particularly relates to a self-adaptive condensation resistance environment control device of an open type control cabinet, which comprises the following components: heating combination and environment control combination; wherein the heating assembly comprises: a fan heater and an independent heater; the fan heater includes: the second fan, the first PTC heating plate and the first radiator; the independent heater includes: a second PTC heating sheet, a second radiator; the environment control combination comprises: the combined installation plate, the first fan, the temperature controller, the fuse and the power supply switch; the device adopts a heating combination to provide a stable heat source for the interior of the control cabinet; and the temperature inside the control cabinet is controlled within a temperature range by adopting the environment control combination. The temperature inside the control cabinet is always higher than the dew point temperature, and condensation is prevented from occurring inside the control cabinet. A dry working environment is created for electronic boxes such as electronic boxes, printed boards, connectors, cables, power supplies and the like in the control cabinet, and corrosion of devices is effectively reduced.
Description
Technical Field
The invention belongs to the technical field of temperature self-adaptive condensation resistance, and particularly relates to a self-adaptive condensation resistance environment control device of an open type control cabinet.
Background
The control cabinet is used for realizing the instruction control function of electronic equipment in the cabin of the ship, the coastal climate environment where the ship is located is high-temperature and high-humidity all year round, and when the partial pressure of water vapor in the air exceeds the saturation pressure at the corresponding temperature, the condensation phenomenon easily occurs in the cabin control cabinet. Leading to the inside electronic box to be corroded and rusted, and seriously influencing the normal work of the control cabinet. In order to improve the service environment of the control cabinet, a set of self-adaptive condensation-resistant ring control device needs to be designed inside the control cabinet, a temperature self-adaptive adjusting system is created inside the cabinet, the temperature inside the control cabinet is increased to be higher than the dew point temperature, and condensation does not occur inside the cabinet. The dry working environment is created for elements such as an electronic box, a printed board, a connector, a cable, a power supply and the like in the cabinet, the corrosion of devices is effectively reduced, and the vitality of equipment is improved.
The existing open type control cabinet anti-condensation methods mainly comprise two methods: one method is to paint anti-condensation paint inside the control cabinet, and the method can control the temperature inside the cabinet within a certain range by increasing the thermal resistance of the cabinet; the other is that heating equipment is used in the cabinet, and the ambient temperature in the cabinet is raised through heat conduction of a heat source.
The Beijing Hengtong green construction energy-saving technology Limited company provides an anti-condensation coating aiming at the problem that an open type air conditioner outdoor unit is easy to frost in winter. The anti-condensation coating comprises a functional material and an organic solvent, and can effectively reduce the condensation temperature after being coated on the surface of an object, and the actual condensation temperature is obviously lower than the dew point temperature, so that the risk of condensation or frost formation is greatly reduced. The anti-condensation coating has the advantages of no need of a complex control unit and easy realization. The anti-condensation coating has the defects that the functional characteristics of the electronic equipment are damaged to a certain extent, the anti-condensation coating has a certain application range, and the anti-condensation coating cannot be generally applied to all electronic equipment.
Aiming at the problem that an outdoor high-low voltage power distribution cabinet is affected with damp and dewed, Liaoning Zhongtian intelligent control technology Limited company provides a condensation preventing device for a cabinet. The condensation preventing device comprises a shell, a cooling fin, a refrigerating unit, a heating unit, a drainage unit and a control unit. In the working process, the microprocessor sends the environmental temperature and humidity sensor data to the upper computer for judgment: when the temperature in the cabinet is less than 30 ℃ and the difference between the environmental temperature and the calculated dew point temperature is less than or equal to 3 ℃, entering a heating and air exhausting mode; and when the temperature in the cabinet is more than or equal to 30 ℃ and the difference between the environmental temperature and the calculated dew point temperature is less than or equal to 3 ℃, entering a refrigeration and air exhaust mode. The circulation is carried out, the difference between the environmental temperature and the theoretical dew point temperature is always kept to be more than or equal to 5 ℃, and moisture in the environmental control in the cabinet is ensured not to be condensed. This prevent condensation device's advantage adopts heating and refrigeration dehumidification dual mode to destroy dew point temperature, makes the temperature in rack internal environment space can not reach dew point temperature all the time, need not artifical temperature and humidity value of setting for, intelligent work. The defects are that the system control mode is relatively redundant and complex, and meanwhile, the product cost is increased.
The above prior art has certain limitations.
For the mode of smearing the anti-condensation paint, firstly, the number and the types of the functional units in the control cabinet are various, and the anti-condensation paint cannot be smeared at the interface of the electric connector, the sliding guide rail and the like, so that the anti-condensation effect of all the functional units cannot be achieved; secondly, the electronic box has certain electromagnetic physical characteristics, and the functional performance of the electronic box can be affected by the anti-condensation coating applied on the surface of the electronic box. That is to say, the use of anti-condensation coating has certain limitation in control cabinet inside, can not accomplish the full coverage of all electronic boxes.
And adopt microprocessor control refrigeration unit, the mode that the inside heating of heating unit realized the rack dehumidifies, need set up corresponding control circuit for microprocessor to control through the host computer. On one hand, software and hardware work flows of an upper computer are increased, and independent self-adaptive control of an anti-condensation device is not realized; on the other hand, the implementation of the control circuit also increases the cost of the product.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a set of self-adaptive anti-condensation environmental control device for an under-cabin open type control cabinet in a high-temperature high-humidity severe environment.
(II) technical scheme
In order to solve the above technical problem, the present invention provides an adaptive anti-condensation environment control device for an open control cabinet, including: heating combination and environment control combination; wherein the heating assembly comprises: a fan heater and an independent heater;
the fan heater includes: the second fan, the first PTC heating plate and the first radiator; the independent heater includes: a second PTC heating sheet, a second radiator;
the environment control combination comprises: the combined installation plate, the first fan, the temperature controller, the fuse and the power supply switch;
a plurality of electronic boxes are arranged in the open type control cabinet, and the rest electronic units including a printed board, a connector, a cable and a power supply are uniformly distributed near each electronic box;
the heating combination is intensively arranged on the side surfaces of the electronic boxes; for each electronic box, 1 heating combination is respectively arranged on the left side surface and the right side surface of the electronic box, namely the number of the heating combinations in the control cabinet is twice of the number of the electronic boxes;
the environment control combination is arranged at the top end of the control cabinet, is a control unit of the self-adaptive condensation-resistant environment control device and is used for controlling the heating combination to be powered on and powered off to stop, so that the temperature in the control cabinet is higher than the dew point temperature, and condensation is prevented;
the combined mounting plate is used for providing a stable and reliable mounting platform for the first fan, the temperature controller, the fuse and the power supply switch, and is also reliably connected with the control cabinet;
the temperature controller is used for controlling the on-off state of the heating combination through the setting of the temperature range of the temperature controller;
the first fan used by the environment control combination and the second fan used by the fan heater are both axial flow fans; the axial flow fan adopts an air draft working mode to promote the convection of air;
the fuse is used as an overcurrent protection device and used for cutting off the power supply of the whole device when the current of the self-adaptive anti-condensation device is too large, so that the effect of preventing the electronic equipment from being damaged is achieved;
the heating combination is used for dispersedly transmitting heat sources provided by the first PTC heating sheet and the second PTC heating sheet to the air in the control cabinet;
in order to effectively improve the heat dissipation effect, the fan heater with the second fan is adopted, the heat source of the heating combination can be quickly and effectively transmitted to the air duct inside the control cabinet, the heat dissipation efficiency is improved, and the heating effect inside the control cabinet is more uniform.
Wherein, in the anti condensation ring accuse device course of operation of self-adaptation:
the self-adaptive anti-condensation environment control device works in the equipment shutdown time period; when the equipment does not work after shutdown, a naval crew starts a power supply switch of the self-adaptive anti-condensation environment control device, the self-adaptive anti-condensation environment control device starts to work, and the temperature controller senses the environment temperature condition inside the cabinet; when the temperature in the control cabinet is lower than the set temperature, the temperature controller is closed by a switch, and all the heating combined working power supplies are switched on to drive the independent heaters and the fan heater to work;
the second PTC heating sheet of the independent heater generates constant-power heat, and the heat is efficiently transferred to the inside of the control cabinet by the second radiator; similarly, the first PTC heating plate of the fan heater also generates constant power heat, which is transferred to the inside of the control cabinet by the first radiator; meanwhile, in order to improve the heat conduction efficiency of each heating combination, the heat generated by each heating combination is accelerated and uniformly conducted into the control cabinet by adopting the second fan, so that the heating efficiency is effectively improved; when all the heating combinations start to heat and rise the temperature, the first fan starts to work to accelerate the propagation of hot air and the discharge of moisture, and a forced convection working state is formed;
when the temperature controller senses that the temperature in the control cabinet reaches the set temperature, the switch is released after the temperature controller delays for a certain time, all the heating combination working power supplies are disconnected, the heating combination stops heating, and meanwhile, the first fan stops working; in the working process of the self-adaptive anti-condensation device, the fuse is used for disconnecting the power supply of the whole device when the current is overlarge, so that the safety of the device is protected;
the self-adaptive anti-condensation environment control device works in a circulating mode, the temperature inside the control cabinet is guaranteed to be higher than the dew point temperature all the time, and the formation of moisture and condensation is prevented.
In consideration of safety, if the temperature controller fails, the temperature inside the cabinet is continuously increased, and the electronic box inside the cabinet is damaged and controlled;
therefore, the temperature controller is subjected to double redundancy design, and a double redundancy scheme that two temperature controllers are connected in series for use is adopted, wherein the temperature controller 1 controls the temperature to be the set temperature, the temperature controller 2 controls the temperature to be higher than the upper limit temperature of the set temperature by a plurality of degrees, and when the temperature controller 1 fails, the temperature inside the cabinet is controlled to continue to rise due to the operation of heating combination;
at the moment, the temperature controller 2 can make up the deficiency of the temperature controller 1 and control the heating combination working temperature in the control cabinet within the upper limit temperature; the effectual effect that has played temperature control rises to above the dew point temperature with the inside temperature of control cabinet, can not damage the inside electronic unit of control cabinet because the temperature is too high simultaneously.
Wherein, be equipped with 4 electronic boxes in the open control cabinet.
Wherein the number of the heating combination is 8.
The heating combination is arranged on the air channels on the two sides in the control cabinet and used for effectively improving the flow rate of hot air and achieving the purpose of quickly and effectively increasing the temperature in the control cabinet.
Wherein, through carrying out accounting to device rated current, it is 4.20A to obtain anti condensation device instantaneous maximum current to, select the fuse model and be: φ 6 × 305A.
When a crew or maintenance personnel needs to perform maintenance test on the control cabinet, the power supply switch positioned at the top end of the control cabinet is disconnected to perform subsequent work; therefore, even if the main switch is in a closed state, the personal injury to maintenance and test personnel contacting the control cabinet due to electric leakage and short circuit conditions can be avoided, and the safety and the maintainability of the self-adaptive anti-condensation environment-control device are improved.
The fan heater and the independent heater of the heating combination are arranged near the electronic box through the heating combination mounting plate.
The first radiator and the second radiator both adopt radiating units in a fin mode.
(III) advantageous effects
The self-adaptive anti-condensation environment control device adopts a heating combination as heating equipment, and provides a stable and reliable heat source for the interior of the control cabinet; the environment control combination is used as an environment temperature control unit to control the temperature inside the control cabinet within a temperature range. The temperature inside the control cabinet is always higher than the dew point temperature, and condensation is prevented from occurring inside the control cabinet. A dry working environment is created for electronic boxes such as electronic boxes, printed boards, connectors, cables, power supplies and the like in the control cabinet, corrosion of devices is effectively reduced, and the vitality of equipment is improved.
Compared with the prior art, the invention has the following core improvement points:
(1) the self-adaptive anti-condensation environment control device does not need to be controlled by an upper computer and a processing unit, can independently realize the anti-condensation effect of the cabin open type control cabinet only by supplying power to the system mains supply, and completely realizes the self-adaptive anti-condensation environment control effect.
(2) The dual-redundancy temperature control unit is built by adopting two temperature controllers, the two temperature controllers are connected through a simple logic relation, the temperature inside the control cabinet is controlled between 33 ℃ and 40 ℃, and the temperature control scheme is simple, reliable and practical.
(3) The heating combination is composed of the fan heater and the independent heater, so that a stable and reliable heat source can be provided, a local air channel can be formed independently, and the heat dissipation efficiency and the uniform heating effect of the heating combination are effectively improved.
(4) Through a large amount of analysis verification, the heating combination is dispersedly distributed in the air duct inside the control cabinet and is close to the main electronic box, and the scheme enables stable heat sources to be arranged around all the electronic boxes inside the control cabinet.
Therefore, compared with the existing anti-condensation device, the invention has the following advantages:
the self-adaptive condensation-resistant environment control device can provide a working environment with self-adaptive temperature adjustment for the electronic box in the cabin open type control cabinet, so that the temperature in the control cabinet is always higher than the dew point temperature, the corrosion of devices is effectively reduced, and the vitality of equipment is improved. The self-adaptive condensation-resistant environment-friendly control device has no complex upper computer control logic and no control circuit, and the heating combination is safe and reliable; the dual-redundancy temperature control unit is simple and practical; the used functional units are mature goods shelf products, and the cost is low. Has the characteristics of simple composition, easy operation, safety, reliability, low cost and the like.
Drawings
Fig. 1 is a system composition diagram of the technical solution of the present invention.
Fig. 2 is an assembly schematic diagram of the technical scheme of the invention.
Wherein, 1, an environment control combination; 2. an electronic box; 3. a back air inlet; 4. heating and combining; 5. and a bottom air inlet.
Fig. 3 is a schematic view of the design of the air duct of the control cabinet according to the technical scheme of the invention.
Fig. 4 is a composition diagram of the environment control combination according to the technical scheme of the invention.
6, assembling a mounting plate; 7. a first fan; 8. a fuse; 9. a power supply switch; 10. and (7) a temperature controller.
FIG. 5 is a view of the heating combination according to the present invention.
Wherein, 11, heating the combined installation plate; 12. a fan heater; 13. a separate heater.
Fig. 6 is a structural diagram of a fan heater according to the technical solution of the present invention.
14, a second fan; 15. a PTC heating sheet; 16. a first heat sink.
Fig. 7 is a composition diagram of an independent heater according to the present invention.
Wherein, 15, PTC heating plate; 17. a second heat sink.
Fig. 8 is a working principle diagram of the technical scheme of the invention.
Fig. 9 is a flowchart of the technical solution of the present invention.
Fig. 10 is a schematic diagram of a dual redundancy design of a temperature controller according to the technical scheme of the invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the problems in the prior art, the invention provides a self-adaptive condensation-resistant environment control device of an open control cabinet, which comprises: heating combination and environment control combination; wherein the heating assembly comprises: a fan heater and an independent heater;
the fan heater includes: a second fan, a first PTC (Positive Temperature Coefficient) heating plate and a first radiator; the independent heater includes: a second PTC heating sheet, a second radiator;
the environment control combination comprises: the combined installation plate, the first fan, the temperature controller, the fuse and the power supply switch; the components are shown in figure 1, and the assembly is schematically shown in figure 2;
a plurality of main electronic boxes are arranged in the open type control cabinet, and the rest electronic units including a printed board, a connector, a cable and a power supply are uniformly distributed near each electronic box;
the heating combination is intensively arranged on the side surfaces of the electronic boxes; for each electronic box, 1 heating combination is respectively arranged on the left side surface and the right side surface of the electronic box, namely the number of the heating combinations in the control cabinet is twice of the number of the electronic boxes; the design mode can not only provide a stable heat source for the electronic box, but also accelerate the circulation of hot air by the aid of the first fan and the second fan, so that the effect of uniform heating of each layer of heating combination is realized;
the environment control combination is arranged at the top end of the control cabinet, is a control unit of the self-adaptive condensation-resistant environment control device and is used for controlling the heating combination to be powered on and powered off to stop, so that the temperature in the control cabinet is higher than the dew point temperature, and condensation is prevented; the composition is shown in fig. 4.
The combined mounting plate is used for providing a stable and reliable mounting platform for the first fan, the temperature controller, the fuse and the power supply switch, and is also reliably connected with the control cabinet;
the temperature controller is used for controlling the on-off state of the heating combination through the setting of the temperature range of the temperature controller;
the first fan used by the environment control combination and the second fan used by the fan heater are both axial flow fans; the axial flow fan adopts an air draft working mode to promote the convection of air;
the fuse is used as an overcurrent protection device and used for cutting off the power supply of the whole device when the current of the self-adaptive anti-condensation device is too large, so that the effect of preventing the electronic equipment from being damaged is achieved;
the heating combination is used for quickly and effectively transmitting the heat sources provided by the first PTC heating sheet and the second PTC heating sheet to the air in the control cabinet in a dispersing way, and can be flexibly arranged at different positions in the control cabinet; and calculating the power density inside the control cabinet to obtain the power of each PTC heating sheet to be 6W.
In order to effectively improve the heat dissipation effect, the fan heater with the second fan is adopted, the heat source of the heating combination can be quickly and effectively transmitted to the air duct inside the control cabinet, the heat dissipation efficiency is improved, and the heating effect inside the control cabinet is more uniform. The fan heater is composed of a second fan, a PTC heating plate and a first radiator, as shown in fig. 6.
Wherein, the anti condensation ring accuse device working process of self-adaptation includes:
(1) dew point temperature confirmation
The dew point temperature is the temperature to which the gas water contained in the air is saturated and condensed into liquid water under the fixed atmospheric pressure in meteorology; according to the condensation generation principle, if the ambient temperature of the equipment is lower than the dew point temperature, condensation is easily generated when the outside air contacts the equipment; according to the weather condition of the ship in the environment of one year, the coastal temperature is 25-35 ℃, and the humidity is 70-80%; the higher the environmental temperature and the higher the humidity, the higher the dew point temperature is; taking the extreme temperature value as 35 ℃ and the humidity as 80%, and checking a relation table among the temperature, the humidity and the dew point to obtain the dew point temperature as 31.0 ℃;
the principle of controlling the internal temperature of the cabinet is as follows: the temperature is slightly higher than the dew point temperature of the working environment, and cannot be too high, so that electronic equipment in the cabinet can be damaged by the excessively high working temperature for a long time; selecting a temperature controller with the temperature measurement error of +/-1.5 ℃, and reserving the allowance of 0.5 ℃, thereby determining the stable working highest temperature of the self-adaptive anti-condensation environment-control device in the control cabinet to be 33+ ° C;
(2) principle of operation
The self-adaptive anti-condensation environment control device works in the equipment shutdown time period; when the equipment does not work after shutdown, a naval crew starts a power supply switch of the self-adaptive anti-condensation environment control device, the self-adaptive anti-condensation environment control device starts to work, and the temperature controller senses the environment temperature condition inside the cabinet; when the temperature in the control cabinet is lower than the set temperature, the temperature controller is closed by a switch, and all the heating combined working power supplies are switched on to drive the independent heaters and the fan heater to work;
the second PTC heating sheet of the independent heater generates constant-power heat, and the heat is efficiently transferred to the inside of the control cabinet by the second radiator; similarly, the first PTC heating plate of the fan heater also generates constant power heat, which is transferred to the inside of the control cabinet by the first radiator; meanwhile, in order to improve the heat conduction efficiency of each heating combination, the heat generated by each heating combination is accelerated and uniformly conducted into the control cabinet by adopting the second fan, so that the heating efficiency is effectively improved; when all the heating combinations start to heat and rise the temperature, the first fan starts to work to accelerate the propagation of hot air and the discharge of moisture, and a forced convection working state is formed;
when the temperature controller senses that the temperature in the control cabinet reaches the set temperature, the switch is released after the temperature controller delays for a certain time (preferably 2 minutes), all heating combination working power supplies are disconnected, the heating combination stops heating, and meanwhile, the first fan stops working; in the working process of the self-adaptive anti-condensation device, the fuse is used for disconnecting the power supply of the whole device when the current is overlarge, so that the safety of the device is protected;
the self-adaptive anti-condensation environment control device works in a circulating mode, the temperature inside the control cabinet is guaranteed to be higher than the dew point temperature all the time, and the formation of moisture and condensation is prevented. The working principle is shown in fig. 8, wherein L is a neutral wire and N is a live wire. The workflow is shown in fig. 9.
In consideration of safety, if the temperature controller fails, the temperature inside the cabinet is continuously increased, and the electronic box inside the cabinet is damaged and controlled;
therefore, the temperature controllers are designed in a dual redundancy mode, a dual redundancy scheme that two temperature controllers are connected in series is adopted, and the working principle of the dual redundancy scheme is shown in figure 10. Wherein, the temperature controller 1 controls the temperature to be the set temperature (33 ℃), the temperature controller 2 controls the temperature to be higher than the upper limit temperature (for example, 40 ℃) of the set temperature by a plurality of degrees, when the temperature controller 1 fails, the temperature inside the control cabinet is likely to continue to rise due to the work of the heating combination;
at the moment, the temperature controller 2 can make up the deficiency of the temperature controller 1 and control the heating combination working temperature in the control cabinet within the upper limit temperature; the effectual effect that has played temperature control rises to above the dew point temperature with the inside temperature of control cabinet, can not damage the inside electronic unit of control cabinet because the temperature is too high simultaneously.
Wherein, be equipped with 4 electronic boxes in the open control cabinet.
Wherein the number of the heating combination is 8.
The heating combination is arranged on the air ducts on the two sides in the control cabinet and used for effectively improving the flow rate of hot air and achieving the purpose of quickly and effectively increasing the temperature in the control cabinet, and the air ducts of the control cabinet are shown in fig. 3.
Wherein, through carrying out accounting to device rated current, it is 4.20A to obtain anti condensation device instantaneous maximum current to, select the fuse model and be: φ 6 × 305A.
When a crew or maintenance personnel needs to perform maintenance test on the control cabinet, the power supply switch positioned at the top end of the control cabinet is disconnected to perform subsequent work; therefore, even if the main switch is in a closed state, the personal injury to maintenance and test personnel contacting the control cabinet due to electric leakage and short circuit conditions can be avoided, and the safety and the maintainability of the self-adaptive anti-condensation environment-control device are improved.
The fan heater and the independent heater of the heating combination are arranged near the electronic box through a heating combination mounting plate, as shown in figure 5.
The first radiator and the second radiator both adopt fin-type radiating units, and the reason is that the fin-type radiating units can remarkably increase the radiating area and improve the radiating efficiency on the premise that the total size, the mass, the consumed metal materials and the flow resistance of the radiators are the same.
Simulation and test verification
And (3) carrying out simulation analysis on the self-adaptive anti-condensation environment control device by using simulation software, and controlling the temperature near the electronic box in the cabinet to be higher than the dew point temperature after the heating combination works stably. Low temperature occurs at the bottom air inlet and the back air inlet because the outside temperature is low and the boundary temperature cannot be raised correspondingly because of low heat exchange efficiency. The temperature distribution around the electronic boxes is uniform, the highest temperature is about 35 ℃ at the center of the cabinet, the temperatures of the electronic boxes at the upper end and the lower end are about 33 ℃, and the temperatures are both higher than the set dew point temperature, so that the simulation result meets the design requirement.
And (3) setting up an experiment platform, adopting an environment simulation test box to carry out a mode of sudden temperature change, and verifying the anti-condensation effect of the self-adaptive anti-condensation environment control device through an experiment. The control cabinet provided with the self-adaptive anti-condensation environment-friendly device is placed in an environment simulation test box, and outside the environment simulation test box is led out of a switch of the self-adaptive anti-condensation environment-friendly device, an operator is ensured to be capable of controlling the switch of the self-adaptive anti-condensation environment-friendly device on the premise of not opening the environment simulation test box, and the environment temperature fluctuation caused by frequent entering and exiting of the environment simulation test box is avoided. In the test process, the temperature of the environment simulation test box is reduced to 0 ℃ and kept for 2 hours. And setting the environmental simulation test chamber to be at the temperature: +18 ℃ and 95% relative humidity for 2 hours. At the moment, more condensation appears on the connector, the circuit board, the side wall, the electronic box and the like in the control cabinet. And starting the self-adaptive anti-condensation environment control device, and after working for 1 hour, the condensation of the connector, the circuit board, the side wall, the electronic box and the like disappears. And continuously working for 8 hours, and detecting once every half hour, wherein no condensation is generated at the connector, the circuit board, the side wall, the electronic box and other parts. The self-adaptive anti-condensation environment control device can effectively ensure that all electronic boxes in the control cabinet do not have condensation, and creates a dry working environment for the electronic boxes in the cabinet, original components such as a printed board, a connector, a cable and a power supply.
In summary, finite element simulation analysis and experimental test verification show that the adaptive anti-condensation environmental control device can achieve the anti-condensation effect in the open control cabinet.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An adaptive anti-condensation environment control device for an open control cabinet, the adaptive anti-condensation environment control device comprising: heating combination and environment control combination; wherein the heating assembly comprises: a fan heater and an independent heater;
the fan heater includes: the second fan, the first PTC heating plate and the first radiator; the independent heater includes: a second PTC heating sheet, a second radiator;
the environment control combination comprises: the combined installation plate, the first fan, the temperature controller, the fuse and the power supply switch;
a plurality of electronic boxes are arranged in the open type control cabinet, and the rest electronic units including a printed board, a connector, a cable and a power supply are uniformly distributed near each electronic box;
the heating combination is intensively arranged on the side surfaces of the electronic boxes; for each electronic box, 1 heating combination is respectively arranged on the left side surface and the right side surface of the electronic box, namely the number of the heating combinations in the control cabinet is twice of the number of the electronic boxes;
the environment control combination is arranged at the top end of the control cabinet, is a control unit of the self-adaptive condensation-resistant environment control device and is used for controlling the heating combination to be powered on and powered off to stop, so that the temperature in the control cabinet is higher than the dew point temperature, and condensation is prevented;
the combined mounting plate is used for providing a stable and reliable mounting platform for the first fan, the temperature controller, the fuse and the power supply switch, and is also reliably connected with the control cabinet;
the temperature controller is used for controlling the on-off state of the heating combination through the setting of the temperature range of the temperature controller;
the first fan used by the environment control combination and the second fan used by the fan heater are both axial flow fans; the axial flow fan adopts an air draft working mode to promote the convection of air;
the fuse is used as an overcurrent protection device and used for cutting off the power supply of the whole device when the current of the self-adaptive anti-condensation device is too large, so that the effect of preventing the electronic equipment from being damaged is achieved;
the heating combination is used for dispersedly transmitting heat sources provided by the first PTC heating sheet and the second PTC heating sheet to the air in the control cabinet;
in order to effectively improve the heat dissipation effect, the fan heater with the second fan is adopted, the heat source of the heating combination can be quickly and effectively transmitted to the air duct inside the control cabinet, the heat dissipation efficiency is improved, and the heating effect inside the control cabinet is more uniform.
2. The adaptive anti-condensation environment control apparatus of an open control cabinet according to claim 1, wherein during operation:
the self-adaptive anti-condensation environment control device works in the equipment shutdown time period; when the equipment does not work after shutdown, a naval crew starts a power supply switch of the self-adaptive anti-condensation environment control device, the self-adaptive anti-condensation environment control device starts to work, and the temperature controller senses the environment temperature condition inside the cabinet; when the temperature in the control cabinet is lower than the set temperature, the temperature controller is closed by a switch, and all the heating combined working power supplies are switched on to drive the independent heaters and the fan heater to work;
the second PTC heating sheet of the independent heater generates constant-power heat, and the heat is efficiently transferred to the inside of the control cabinet by the second radiator; similarly, the first PTC heating plate of the fan heater also generates constant power heat, which is transferred to the inside of the control cabinet by the first radiator; meanwhile, in order to improve the heat conduction efficiency of each heating combination, the heat generated by each heating combination is accelerated and uniformly conducted into the control cabinet by adopting the second fan, so that the heating efficiency is effectively improved; when all the heating combinations start to heat and rise the temperature, the first fan starts to work to accelerate the propagation of hot air and the discharge of moisture, and a forced convection working state is formed;
when the temperature controller senses that the temperature in the control cabinet reaches the set temperature, the switch is released after the temperature controller delays for a certain time, all the heating combination working power supplies are disconnected, the heating combination stops heating, and meanwhile, the first fan stops working; in the working process of the self-adaptive anti-condensation device, the fuse is used for disconnecting the power supply of the whole device when the current is overlarge, so that the safety of the device is protected;
the self-adaptive anti-condensation environment control device works in a circulating mode, the temperature inside the control cabinet is guaranteed to be higher than the dew point temperature all the time, and the formation of moisture and condensation is prevented.
3. The adaptive condensation-resistant environmental control apparatus for an open control cabinet according to claim 2, wherein the temperature inside the cabinet is increased continuously to damage the electronic box inside the control cabinet due to the failure of the thermostat for safety;
therefore, the temperature controller is subjected to double redundancy design, and a double redundancy scheme that two temperature controllers are connected in series for use is adopted, wherein the temperature controller 1 controls the temperature to be the set temperature, the temperature controller 2 controls the temperature to be higher than the upper limit temperature of the set temperature by a plurality of degrees, and when the temperature controller 1 fails, the temperature inside the cabinet is controlled to continue to rise due to the operation of heating combination;
at the moment, the temperature controller 2 can make up the deficiency of the temperature controller 1 and control the heating combination working temperature in the control cabinet within the upper limit temperature; the effectual effect that has played temperature control rises to above the dew point temperature with the inside temperature of control cabinet, can not damage the inside electronic unit of control cabinet because the temperature is too high simultaneously.
4. The adaptive anti-condensation environment control apparatus of an open control cabinet according to claim 1, wherein there are 4 electronic boxes in the open control cabinet.
5. The adaptive anti-condensation loop control apparatus of an open control cabinet of claim 4, wherein the number of heating combinations is 8.
6. The adaptive anti-condensation environmental control apparatus of an open control cabinet as claimed in claim 1, wherein the heating units are disposed on two side air ducts in the control cabinet for effectively increasing the flow rate of hot air to achieve the purpose of rapidly and effectively increasing the temperature inside the control cabinet.
7. The adaptive anti-condensation environment control device of the open control cabinet according to claim 1, wherein the instantaneous maximum current of the anti-condensation device is 4.20A by checking the rated current of the device, so that the fuse model is selected as follows: φ 6 × 305A.
8. The adaptive condensation-resistant environment control device of the open control cabinet according to claim 1, wherein the power switch is in a normally-on state, and when a naval crew or a maintenance crew needs to perform a maintenance test on the control cabinet, the power switch at the top end of the control cabinet is turned off to perform subsequent work; therefore, even if the main switch is in a closed state, the personal injury to maintenance and test personnel contacting the control cabinet due to electric leakage and short circuit conditions can be avoided, and the safety and the maintainability of the self-adaptive anti-condensation environment-control device are improved.
9. The adaptive condensation resistant environmental control apparatus of an open control cabinet of claim 1, wherein the combined fan heater and individual heater are mounted adjacent to the electronics box by a combined heating mounting plate.
10. The adaptive anti-condensation environment control apparatus of an open control cabinet according to claim 1, wherein the first and second radiators are each a heat dissipation unit in the form of fins.
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| CN202111051517.XA CN113597231A (en) | 2021-09-08 | 2021-09-08 | Self-adaptive anti-condensation environment control device of open type control cabinet |
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| CN202111051517.XA CN113597231A (en) | 2021-09-08 | 2021-09-08 | Self-adaptive anti-condensation environment control device of open type control cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117666659A (en) * | 2024-02-01 | 2024-03-08 | 山东安信种苗股份有限公司 | Greenhouse seedling raising and cooling control method, system and terminal |
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