Anti-condensation automatic control device for power equipment

Abstract

The invention discloses an anti-condensation automatic control device for power equipment, and relates to the field of anti-condensation control, and the key points of the technical scheme are that redundant heat energy in a main box body can be recovered through a temperature difference power generation module; condensation treatment measures can be triggered in advance by accelerating the condensation forming process when the basic condition for forming condensation is met, the indoor temperature or the indoor humidity is correspondingly selected for judgment after comparison and judgment are carried out on the size of the power generation current, the high-temperature hazard condition and the condensation hazard condition can be accurately recognized, and the method is suitable for popularization and application. The number of sensors started at the same time is small, and overall logic analysis is simple and easy to implement.

Description

Technical Field

[0001] The invention relates to the field of anti-condensation control, and more specifically, to an automatic anti-condensation control device for electric equipment. Background Art

[0002] Condensation mainly occurs in outdoor enclosed boxes containing precision equipment, such as terminal boxes, switch mechanism boxes, high-voltage indoor switch cabinets with low indoor temperatures, and other power equipment. When the temperature drops and the humidity is high, condensation is easily formed inside the box, and the formed water droplets will adhere to the metal and plastic parts inside, causing corrosion. In addition, condensation may cause short circuits in the metal conductive parts on the terminal block, especially when condensation is mixed with dust, which may cause AC and DC short circuits to ground, causing great harm to the stable operation of the secondary system of the substation. In addition, condensation will also reduce its insulation performance, which may cause creepage or flashover, seriously affecting the normal operation of the equipment.

[0003] At present, the technical ideas for preventing condensation mainly focus on reducing the condensation of water vapor in the air, controlling the temperature difference, increasing the surface temperature of objects, improving ventilation conditions and using dehumidification equipment. For example, controlling the temperature difference: ensuring that the temperature of the surface of the object is not lower than the dew point temperature of the surrounding air to avoid condensation of water vapor on its surface, which can be achieved by heating the surface of the equipment or using insulation materials. For example, improving ventilation: providing good ventilation conditions to remove excess water vapor and reduce the humidity in the air, which is generally achieved by installing ventilation systems, fans or vents. Another example is the use of dehumidification equipment: in an environment with heavy humidity, use a dehumidifier or desiccant to reduce the humidity of the air, thereby reducing the possibility of condensation.

[0004] However, the factors that affect the formation of condensation include temperature and humidity, so it is generally necessary to obtain the temperature and humidity indoors and outdoors at the same time in order to accurately determine the anti-condensation measures taken through logical analysis, such as arranging a temperature sensor and a humidity sensor indoors and a temperature sensor and a humidity sensor outdoors, which requires more sensor equipment; in addition, the condensation formation process is relatively slow, and the power equipment is in a high temperature and high humidity environment for most of the time during the condensation formation stage, which will also cause harm to the power equipment for a long time. Therefore, how to study and design an automatic anti-condensation control device for power equipment that can overcome the above defects is a problem that we urgently need to solve. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide an automatic control device for preventing condensation of electric equipment. The excess heat energy in the main box can be recovered through the temperature difference power generation module, and the condensation treatment measures can be triggered in advance by accelerating the condensation formation process when the basic conditions for the formation of condensation are met. After comparing and judging the size of the power generation current, the corresponding indoor temperature or indoor humidity is selected for judgment, and high temperature hazard and condensation hazard can be accurately identified. Not only is the number of sensors started at the same time small, but the overall logical analysis is simple and easy to implement.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic control device for preventing condensation of electric equipment, comprising a temperature sensor, a humidity sensor, a temperature difference power generation module, a current sensor, a first control module, a second control module, a third control module, a dehumidification component, an exhaust component, a refrigeration component and a main box;

[0007] The hot end of the temperature difference power generation module is inside the main box body, and the cold end is outside the main box body;

[0008] The current sensor is used to detect the power generation current of the temperature difference power generation module;

[0009] The first control module is used to compare the generated current with the reference current, and output a first signal when the generated current is greater than the reference current, and output a second signal when the generated current is less than the reference current;

[0010] The temperature sensor detects the indoor temperature in the main box in response to the first signal;

[0011] The humidity sensor detects the indoor humidity in the main box in response to the second signal;

[0012] The second control module is used to compare the indoor temperature with the reference temperature, and output a third signal when the indoor temperature is greater than the reference temperature, and output a fourth signal when the indoor temperature is less than the reference temperature;

[0013] The third control module is used to compare the indoor humidity with the reference humidity, and output a fifth signal when the indoor humidity is greater than the reference humidity, and output a sixth signal when the indoor humidity is less than the reference humidity;

[0014] The dehumidification component is activated in response to the fourth signal or the fifth signal to dehumidify the air in the main box;

[0015] The exhaust assembly is activated in response to the third signal to circulate and exchange air inside and outside the main box;

[0016] The refrigeration component is started in response to the sixth signal to refrigerate the air in the main box.

[0017] Furthermore, the temperature difference power generation module includes a temperature difference power generation component and an energy storage module;

[0018] The output end of the temperature difference power generation component is connected to the input end of the energy storage module;

[0019] The current sensor detects the current at the output end of the temperature difference power generation component;

[0020] Furthermore, the energy storage module supplies power to the automatic anti-condensation control device for electric equipment after being connected to an external power source.

[0021] Furthermore, the temperature difference power generation component adopts a semiconductor temperature difference power generation sheet.

[0022] Furthermore, a side of the semiconductor temperature difference power generation sheet close to the outside of the main box is wrapped with a heat-conducting insulation layer.

[0023] Furthermore, the thermally conductive insulating layer is a thermally conductive silicone layer, a thermally conductive silicone grease layer or a polyimide film.

[0024] Further, the first control module includes a current comparator and a first controller;

[0025] The current comparator compares the generated current with the reference current, and outputs a high level signal when the generated current is greater than the reference current, and outputs a low level signal when the generated current is less than the reference current;

[0026] The first controller outputs a first signal after receiving a high level signal, and outputs a second signal after receiving a low level signal.

[0027] Further, the second control module includes a first voltage comparator and a second controller;

[0028] The first voltage comparator compares the indoor temperature with the reference temperature, and outputs a high level signal when the indoor temperature is greater than the reference temperature, and outputs a low level signal when the indoor temperature is less than the reference temperature;

[0029] The second controller outputs a third signal after receiving a high level signal, and outputs a fourth signal after receiving a low level signal.

[0030] Further, the third control module includes a second voltage comparator and a third controller;

[0031] The second voltage comparator compares the indoor humidity with the reference humidity, and outputs a high level signal when the indoor humidity is greater than the reference humidity, and outputs a low level signal when the indoor humidity is less than the reference humidity;

[0032] The third controller outputs a fifth signal after receiving a high level signal, and outputs a sixth signal after receiving a low level signal.

[0033] Furthermore, the main box is a box of a box-type substation, a terminal box, a switch mechanism box or a high-voltage indoor switch cabinet.

[0034] Further, the device also includes a normally open relay and a timer;

[0035] The current sensor is connected to the power supply end through a normally open relay;

[0036] The timer is used to output a trigger signal at a fixed time;

[0037] The normally open relay is started at a fixed time after responding to the trigger signal, and the current sensor is energized after the normally open contact switch of the normally open relay is closed.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention provides an automatic control device for preventing condensation of electric equipment. The excess heat energy in the main box can be recovered through the temperature difference power generation module. When the basic conditions for forming condensation are met, the condensation treatment measures can be triggered in advance by accelerating the condensation formation process. After comparing and judging the size of the power generation current, the size of the corresponding indoor temperature or indoor humidity is selected for judgment. The high temperature hazard and condensation hazard can be accurately identified. Not only is the number of sensors started at the same time small, but the overall logic analysis is simple and easy to implement.

[0040] 2. The present invention stores the electric energy recovered by the temperature difference power generation assembly through the energy storage module, and connects the energy storage module to an external power supply to supply power to the automatic control device for preventing condensation of electric equipment, thereby ensuring that the electric energy in the main box can be continuously recovered and the automatic control device for preventing condensation of electric equipment can be supplied with stable power;

[0041] 3. The temperature difference power generation component of the present invention adopts a semiconductor temperature difference power generation sheet, which can be applied to complex and changeable indoor and outdoor environments. A heat conductive insulation layer is wrapped on one side of the semiconductor temperature difference power generation sheet close to the outside of the main box, which can enhance the safety of the application of the temperature difference power generation component;

[0042] 4. The present invention controls the operation of the current sensor by means of timed start, which can effectively reduce the energy consumption of the automatic anti-condensation control device of the power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0044] Figure 1 It is a working principle diagram in an embodiment of the present invention.

[0045] Marks and corresponding parts names in the attached drawings:

[0046] 1. Main box; 2. Temperature difference power generation component; 3. Temperature sensor; 4. Humidity sensor; 5. Exhaust component; 6. Dehumidification component; 7. Refrigeration component; 8. Energy storage module; 9. Current sensor; 10. First control module; 11. Second control module; 12. Third control module. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0048] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0049] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] Embodiment: An automatic control device for preventing condensation of electric equipment, such as Figure 1 As shown, it includes a temperature sensor 3, a humidity sensor 4, a temperature difference power generation module, a current sensor 9, a first control module 10, a second control module 11, a third control module 12, a dehumidification component 6, an exhaust component 5, a refrigeration component 7 and a main box body 1.

[0052] Among them, the hot end of the temperature difference power generation module is the inside of the main box 1, and the cold end is the outside of the main box 1; the current sensor 9 is used to detect the power generation current of the temperature difference power generation module; the first control module 10 is used to compare the power generation current with the reference current, and output a first signal when the power generation current is greater than the reference current, and output a second signal when the power generation current is less than the reference current.

[0053] In addition, the probes of the temperature sensor 3 and the humidity sensor 4 are both installed in the main box 1. The temperature sensor 3 detects the indoor temperature in the main box 1 in response to the first signal; the humidity sensor 4 detects the indoor humidity in the main box 1 in response to the second signal. When the temperature sensor 3 is activated: the second control module 11 is used to compare the indoor temperature with the reference temperature, and output a third signal when the indoor temperature is greater than the reference temperature, and output a fourth signal when the indoor temperature is less than the reference temperature. When the humidity sensor 4 is activated: the third control module 12 is used to compare the indoor humidity with the reference humidity, and output a fifth signal when the indoor humidity is greater than the reference humidity, and output a sixth signal when the indoor humidity is less than the reference humidity.

[0054] After the above-mentioned hard logic analysis, the equipment configured in the main box 1 can be controlled to execute disposal measures. Specifically, the dehumidification component 6 is started after responding to the fourth signal or the fifth signal, and is used to dehumidify the air in the main box 1; the exhaust component 5 is started after responding to the third signal, and is used to circulate and exchange the air inside and outside the main box 1; the refrigeration component 7 is started after responding to the sixth signal, and is used to cool the air in the main box 1.

[0055] Under the action of the temperature difference power generation module, the temperature distribution inside and outside the main box 1 that needs to be dealt with mainly includes: 1. The situation where the indoor temperature is high and the outdoor temperature is not high is generally caused by the heat energy generated quickly by the high load and fault operation of the equipment in the main box 1; 2. The situation where the indoor temperature is high and the outdoor temperature is also high is mainly caused by hot weather; 3. The situation where the indoor temperature is low and the outdoor temperature is also low is mainly caused by the alternation of day and night.

[0056] For the above situation 1, due to the temperature rise, it is difficult for the humidity in the air to reach a saturated state. In this case, if the temperature sensor 3 can be started, it means that there is a high temperature difference in the room of the main box 1, and the indoor temperature measured by the temperature sensor 3 is high. It can be basically determined that the outdoor temperature is not high. Considering energy-saving operation, the exhaust component 5 is used to circulate and exchange the air inside and outside the main box 1.

[0057] In addition, if the indoor temperature measured by the temperature sensor 3 is low, it can be basically determined that the outdoor temperature is even lower, which generally meets the situation 3.

[0058] In addition, the humidity sensor 4 is started when the temperature difference is small. If the humidity is small, condition 2 is generally satisfied. If the humidity is large, condition 3 is generally satisfied.

[0059] In this embodiment, the thermoelectric power generation module includes a thermoelectric power generation component 2 and an energy storage module 8; the output end of the thermoelectric power generation component 2 is connected to the input end of the energy storage module 8; the current sensor 9 detects the current at the output end of the thermoelectric power generation component 2; and the energy storage module 8 is connected to an external power supply to supply power to the anti-condensation automatic control device of the power equipment.

[0060] The temperature difference power generation component 2 of the present invention adopts a semiconductor temperature difference power generation sheet, which can be applied to complex and changeable indoor and outdoor environments. A heat conductive insulation layer is wrapped on one side of the semiconductor temperature difference power generation sheet close to the outside of the main box 1, which can enhance the safety of the application of the temperature difference power generation component 2.

[0061] The thermally conductive insulating layer is any one or more combinations of a thermally conductive silicone layer, a thermally conductive silicone grease layer and a polyimide film.

[0062] In this embodiment, the first control module 10 includes a current comparator and a first controller; the current comparator compares the generated current with the reference current, and outputs a high-level signal when the generated current is greater than the reference current, and outputs a low-level signal when the generated current is less than the reference current; the first controller outputs a first signal after receiving the high-level signal, and outputs a second signal after receiving the low-level signal.

[0063] Specifically, the positive phase input terminal of the current comparator inputs the generated current, while the negative phase input terminal of the current comparator inputs the reference current, and the output terminal of the current comparator is connected to the first controller.

[0064] In this embodiment, the second control module 11 includes a first voltage comparator and a second controller; the first voltage comparator compares the indoor temperature with the reference temperature, and outputs a high-level signal when the indoor temperature is greater than the reference temperature, and outputs a low-level signal when the indoor temperature is less than the reference temperature; the second controller outputs a third signal after receiving the high-level signal, and outputs a fourth signal after receiving the low-level signal.

[0065] Specifically, the positive phase input terminal of the first voltage comparator inputs a voltage signal corresponding to the indoor temperature, while the negative phase input terminal of the first voltage comparator inputs a voltage signal corresponding to the reference temperature, and the output terminal of the first voltage comparator is connected to the second controller.

[0066] In this embodiment, the third control module 12 includes a second voltage comparator and a third controller; the second voltage comparator compares the indoor humidity with the reference humidity, and outputs a high-level signal when the indoor humidity is greater than the reference humidity, and outputs a low-level signal when the indoor humidity is less than the reference humidity; the third controller outputs a fifth signal after receiving the high-level signal, and outputs a sixth signal after receiving the low-level signal.

[0067] Specifically, the positive phase input terminal of the second voltage comparator inputs the voltage signal corresponding to the indoor humidity, while the negative phase input terminal of the second voltage comparator inputs the voltage signal corresponding to the reference humidity, and the output terminal of the second voltage comparator is connected to the third controller.

[0068] In this embodiment, the main box 1 includes but is not limited to a box of a box-type substation, a terminal box, a switch mechanism box or a high-voltage indoor switch cabinet.

[0069] In addition, the present invention can also be configured with a normally open relay and a timer; the current sensor 9 is connected to the power supply end through the normally open relay; the timer is used to output a trigger signal at a fixed time; the normally open relay starts at a fixed time after responding to the trigger signal, and the current sensor 9 is energized after the normally open contact switch of the normally open relay is closed. The present invention controls the operation of the current sensor 9 by means of a timed start, which can effectively reduce the energy consumption of the automatic control device for preventing condensation of electric equipment.

[0070] It should be noted that the reference current, reference temperature and reference humidity described in the present invention are generally determined through simulation adaptation to ensure safe and stable operation of the entire device.

[0071] Working principle: The present invention can recover the excess heat energy in the main box 1 through the temperature difference power generation module, and can trigger condensation treatment measures in advance by accelerating the condensation formation process when the basic conditions for the formation of condensation are met. After comparing and judging the size of the power generation current, the corresponding indoor temperature or indoor humidity is selected for judgment, and high temperature hazards and condensation hazards can be accurately identified. Not only is the number of sensors started at the same time small, but the overall logical analysis is simple and easy to implement.

[0072] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic control device for preventing condensation of electric equipment, characterized in that: It comprises a temperature sensor (3), a humidity sensor (4), a temperature difference power generation module, a current sensor (9), a first control module (10), a second control module (11), a third control module (12), a dehumidification component (6), an exhaust component (5), a refrigeration component (7) and a main box (1); The hot end of the temperature difference power generation module is on the inside of the main box (1), and the cold end is on the outside of the main box (1); The current sensor (9) is used to detect the power generation current of the temperature difference power generation module; The first control module (10) is used to compare the generated current with the reference current, and output a first signal when the generated current is greater than the reference current, and output a second signal when the generated current is less than the reference current; The temperature sensor (3) detects the indoor temperature in the main box (1) in response to the first signal; The humidity sensor (4) detects the indoor humidity in the main box (1) in response to the second signal; The second control module (11) is used to compare the indoor temperature with the reference temperature, and output a third signal when the indoor temperature is greater than the reference temperature, and output a fourth signal when the indoor temperature is less than the reference temperature; The third control module (12) is used to compare the indoor humidity with the reference humidity, and output a fifth signal when the indoor humidity is greater than the reference humidity, and output a sixth signal when the indoor humidity is less than the reference humidity; The dehumidification component (6) is activated in response to the fourth signal or the fifth signal, and is used to dehumidify the air in the main box (1); The exhaust assembly (5) is activated in response to the third signal, and is used to circulate and exchange air inside and outside the main box (1); The refrigeration component (7) is activated in response to the sixth signal and is used to cool the air in the main box (1).

2. The automatic control device for preventing condensation of electric power equipment according to claim 1 is characterized in that: The temperature difference power generation module comprises a temperature difference power generation component (2) and an energy storage module (8); The output end of the temperature difference power generation component (2) is connected to the input end of the energy storage module (8); The current sensor (9) detects the current at the output end of the temperature difference power generation component (2); Furthermore, the energy storage module (8) supplies power to the automatic anti-condensation control device for electric equipment after being connected to an external power source.

3. The automatic control device for preventing condensation of electric equipment according to claim 1 is characterized in that: The temperature difference power generation component (2) adopts a semiconductor temperature difference power generation sheet.

4. The automatic control device for preventing condensation of electric equipment according to claim 3 is characterized in that: The side of the semiconductor temperature difference power generation sheet close to the outside of the main box (1) is wrapped with a heat-conducting insulation layer.

5. The automatic control device for preventing condensation of electric equipment according to claim 4 is characterized in that: The heat-conducting insulating layer is a heat-conducting silica gel layer, a heat-conducting silicone grease layer or a polyimide film.

6. The automatic control device for preventing condensation of electric equipment according to claim 1 is characterized in that: The first control module (10) comprises a current comparator and a first controller; The current comparator compares the generated current with the reference current, and outputs a high level signal when the generated current is greater than the reference current, and outputs a low level signal when the generated current is less than the reference current; The first controller outputs a first signal after receiving a high level signal, and outputs a second signal after receiving a low level signal.

7. The automatic control device for preventing condensation of electric equipment according to claim 1 is characterized in that: The second control module (11) comprises a first voltage comparator and a second controller; The first voltage comparator compares the indoor temperature with the reference temperature, and outputs a high level signal when the indoor temperature is greater than the reference temperature, and outputs a low level signal when the indoor temperature is less than the reference temperature; The second controller outputs a third signal after receiving a high level signal, and outputs a fourth signal after receiving a low level signal.

8. The automatic control device for preventing condensation of electric equipment according to claim 1 is characterized in that: The third control module (12) comprises a second voltage comparator and a third controller; The second voltage comparator compares the indoor humidity with the reference humidity, and outputs a high level signal when the indoor humidity is greater than the reference humidity, and outputs a low level signal when the indoor humidity is less than the reference humidity; The third controller outputs a fifth signal after receiving a high level signal, and outputs a sixth signal after receiving a low level signal.

9. The automatic control device for preventing condensation of electric power equipment according to claim 1 is characterized in that: The main box (1) is a box of a box-type substation, a terminal box, a switch mechanism box or a high-voltage indoor switch cabinet.

10. The automatic control device for preventing condensation of electric power equipment according to claim 1, characterized in that: The device also includes a normally open relay and a timer; The current sensor (9) is connected to the power supply end via a normally open relay; The timer is used to output a trigger signal at a fixed time; The normally open relay is started at a fixed time after responding to a trigger signal, and the current sensor (9) is energized after the normally open contact switch of the normally open relay is closed.

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