Anti-condensation system and leak detection and control method thereof

Abstract

The invention provides an anti-condensation system and a leak detection and control method thereof, and relates to the technical field of condensation prevention. The invention discloses an anti-condensation system and a leak detection and control method thereof. The anti-condensation system comprises a gas tank; the air pressure regulator is communicated with the air box and forms a closed air chamber with the air box; the communicating device is arranged between the air pressure regulator and the air tank and is used for communicating or closing a passage between the air tank and the air pressure regulator; the heating system is arranged on the outer side of the gas tank and used for detecting and adjusting the surface temperature of the gas tank; the monitoring control module is respectively connected with the heating system and the gas tank; the pressure regulator is used for compensating the air pressure change caused by the temperature generated by the current in the air tank, so that the air leakage failure of the air tank caused by the pressure difference generated by the air pressure change is avoided, and the insulation breakdown fault caused by condensation generated by external water vapor entering the air tank is further prevented; and the heating system heats the surface of the gas tank as required, so that condensation on the surface of the gas tank is further prevented or eliminated, and the use safety of the gas tank is improved.

Description

Technical Field

[0001] This application relates to the technical field of anti-condensation, and particularly to an anti-condensation system and its leak detection and control methods. Background Art

[0002] The environmental protection substitution of the strong greenhouse gas SF6 has become a research hotspot in the power industry. Replacing SF6-type ring main units with atmospheric pressure sealed air-insulated ring main units is one of the solutions to reduce the use of SF6.

[0003] Currently, the main method for maintaining equal air pressures inside and outside the gas tank of the atmospheric pressure sealed air-insulated ring main unit is to open holes on the surface of the gas tank and arrange breathable membranes or expansion devices on the holes.

[0004] The breathable membrane is used to block dust particles and liquid water from entering the gas tank, but gaseous water molecules can still enter the gas tank. Under certain temperature and humidity conditions, the gas water molecules entering the gas tank interior may condense, and when the condensation reaches a certain degree, it may cause insulation breakdown faults of the insulating parts.

[0005] When the conductor inside the gas tank operates at different currents, the surface temperature of the conductor is different, which leads to different gas temperatures inside the gas tank, and ultimately causes changes in the air pressure inside the gas tank; the expansion device is used to compensate for this air pressure to make the air pressures inside and outside the gas tank consistent. However, when the expansion device is damaged after reaching a certain service life or under external force damage, dust enters the gas tank and adheres to the insulating surface. When there is dust on the insulating surface, condensation occurs more easily than when the insulating surface is clean, and the insulation performance decreases more significantly, and the probability of insulation breakdown is higher. Summary of the Invention

[0006] Based on this, this application provides an anti-condensation system and its leak detection and control methods to solve the problem of insulation breakdown caused by condensation in the atmospheric pressure sealed ring main unit.

[0007] The anti-condensation system disclosed in this application includes: a gas tank provided with a pressure regulation port;

[0008] A pressure regulator disposed in the gas tank and located at the pressure regulation port;

[0009] A connection device disposed in the gas tank and located at the pressure regulation port for connecting or closing the passage between the gas tank and the outside;

[0010] A heating system disposed in the gas tank for detecting and adjusting the surface temperature of the gas tank;

[0011] A monitoring and control module connected to the heating system and the gas tank respectively.

[0012] Optionally, it further includes a leakage measurement system, which is arranged in the air box for monitoring whether there is air leakage in the anti-condensation system, and the leakage measurement system is connected to the monitoring and control module.

[0013] Optionally, it further includes a protective device, which is arranged outside the pressure regulator and covers the pressure regulator.

[0014] Optionally, the pressure regulator includes a breathable membrane and an expander;

[0015] The expander is arranged in the air box and located at the pressure regulation port;

[0016] The breathable membrane is arranged at the pressure regulation port.

[0017] Optionally, the heating system includes a heater, a first temperature sensor, a second temperature sensor and a humidity sensor; among them,

[0018] The heater is arranged on the outer wall of the air box and connected to the monitoring and control module for adjusting the surface temperature of the air box to prevent condensation;

[0019] The first temperature sensor is arranged on the outer wall of the air box and connected to the monitoring and control module for detecting the surface temperature of the air box;

[0020] The second temperature sensor is connected to the monitoring and control module for detecting the external environmental temperature;

[0021] The humidity sensor is connected to the monitoring and control module for detecting the external environmental humidity.

[0022] Optionally, the leakage measurement system includes a displacement gauge, a displacement auxiliary row, an auxiliary row guide and a barometer; among them,

[0023] The auxiliary row guide is arranged outside the pressure regulator for guiding and limiting the movement of the displacement auxiliary row;

[0024] The displacement auxiliary row is connected to the pressure regulator, the displacement auxiliary row is arranged on the auxiliary row guide, and the displacement auxiliary row moves along the auxiliary row guide;

[0025] The displacement gauge is respectively connected to the displacement auxiliary row and the monitoring and control module for detecting the displacement value of the movement of the displacement auxiliary row and transmitting the value to the monitoring and control module;

[0026] The barometer is connected to the monitoring and control module for detecting the external environmental air pressure.

[0027] Optionally, the connection device includes a narrow path and a valve, where

[0028] the narrow path is arranged at the air pressure regulating port;

[0029] the valve is arranged on the narrow path and is used to open or close the narrow path.

[0030] Optionally, a plurality of uniformly distributed holes are arranged at the end of the narrow path, and the breathable membrane covers the holes.

[0031] Optionally, anti-condensation coatings are provided on both the protection device and the inner wall of the air box.

[0032] Optionally, the air leakage measurement system includes a humidity detection device, which is used to measure the humidity value inside the air box, and the humidity detection device is connected to the monitoring and control module.

[0033] A leak detection method for the above anti-condensation system, characterized by including the following steps:

[0034] Set the maximum error value of the absolute value of the difference between the theoretical volume and the actual volume of the pressure regulator as the first fixed value;

[0035] The air leakage measurement system detects the position information of the volume change of the pressure regulator, transmits the position information to the monitoring and control module, and calculates the actual volume of the pressure regulator;

[0036] The monitoring and control module detects and obtains the external air pressure value through the air leakage measurement system, obtains the air box current value through the air box, and calculates the theoretical volume of the pressure regulator;

[0037] The monitoring and control module compares the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator with the first fixed value to determine whether the pressure regulator leaks.

[0038] Optionally, the monitoring and control module compares the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator with the first fixed value to determine whether the pressure regulator leaks, including the following steps:

[0039] When the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator is less than the first fixed value, it is determined that the pressure regulator is operating normally;

[0040] When the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator is greater than the first fixed value, it is determined that the pressure regulator leaks, and the monitoring and control module issues an alarm of "pressure regulator leaks".

[0041] A leak detection method for the above anti-condensation system, characterized by comprising the following steps:

[0042] The internal humidity value of the air box is detected by the air leakage measurement system and transmitted to the monitoring and control module. When the humidity exceeds the set critical range humidity value, it is determined that there is air leakage, and the monitoring and control module issues an alarm of "air pressure regulator air leakage".

[0043] A control method for the above anti-condensation system, comprising the following steps:

[0044] Set the minimum operating load current value of the air box as the second fixed value, and set the temperature margin before condensation as the third fixed value;

[0045] When the monitoring and control module detects that the working current value of the air box is less than the second fixed value or the monitoring and control module is powered off, the connecting device closes and the heating system does not work;

[0046] When the monitoring and control module detects that the working current value of the air box is greater than the second fixed value, the connecting device opens;

[0047] When the monitoring and control module determines that the air pressure regulator is operating normally in the state where the connecting device is open, the heating system does not work;

[0048] When the monitoring and control module determines that the air pressure regulator leaks in the state where the connecting device is open, the heating system operates to eliminate or prevent condensation.

[0049] Optionally, the steps of the heating system operation include:

[0050] The heating system respectively detects the surface temperature, external environment temperature and external environment humidity of the air box;

[0051] The heating system transmits the detected surface temperature value, external environment temperature value and external environment humidity value of the air box to the monitoring and control module;

[0052] The monitoring and control module calculates the condensation temperature through the external environment temperature value and the external environment humidity value;

[0053] When the difference between the surface temperature value of the air box and the condensation temperature is less than the third fixed value, the heating system starts and warms up the surface of the air box;

[0054] When the difference between the surface temperature value of the air box and the condensation temperature is greater than the third fixed value, the heater is turned off and the warming of the surface of the air box is stopped.

[0055] The anti-condensation system of the present application and its leak detection and control method compensate for the air pressure change caused by the temperature generated by the current in the gas tank through a pressure regulator, avoiding the leakage failure of the gas tank due to the pressure difference caused by the air pressure change, and further preventing external water vapor from entering the gas tank to generate condensation and causing insulation breakdown faults; the heating system increases the temperature of the gas tank surface when required, further preventing or eliminating condensation on the gas tank surface and improving the safety of the gas tank; the connecting device connects or closes the passage between the gas tank and the pressure regulator. When the gas tank is not working or the pressure regulator leaks, the passage between the gas tank and the pressure regulator can be quickly closed through the connecting device to prevent condensation, extend the service life of the gas tank and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without exceeding the scope of protection required by the present application.

[0057] Figure 1 It is a schematic structural diagram of the first embodiment of the anti-condensation system provided by the present application;

[0058] Figure 2 It is an enlarged schematic structural diagram of the connecting device in the anti-condensation system provided by the present application;

[0059] Figure 3 It is a schematic structural diagram of the hole in the anti-condensation system provided by the present application;

[0060] Figure 4 It is a schematic structural diagram of the displacement auxiliary row and the auxiliary row guide in the anti-condensation system provided by the present application;

[0061] Figure 5 It is a schematic structural diagram of the second embodiment of the anti-condensation system provided by the present application;

[0062] Figure 6 It is a schematic structural diagram of the third embodiment of the anti-condensation system provided by the present application;

[0063] Figure 7 It is a flowchart of the first leak detection method of the anti-condensation system provided by the present application;

[0064] Figure 8 It is a flowchart of the control method of the anti-condensation system provided by the present application.

[0065] Description of the reference numerals: 1. air box; 11. air pressure adjustment port; 2. air pressure regulator; 21. breathable membrane; 22. expander; 3. connecting device; 31. narrow path; 32. valve; 33. hole; 4. heating system; 41. heater; 42. first temperature sensor; 43. second temperature sensor; 44. humidity sensor; 5. monitoring and control module; 6. air leakage measurement system; 61. displacement gauge; 62. displacement auxiliary row; 63. auxiliary row guide; 64. barometer; 65. humidity detection device; 7. protection device; 8. anti-condensation coating. Detailed implementation manners

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0067] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, terms such as "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0068] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0069] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is less than that of the second feature.

[0070] First Embodiment:

[0071] Reference Figure 1 Figure 1 , an anti-condensation system disclosed in this application includes: an air box 1, a pressure regulator 2, a connection device 3, a heating system 4 and a monitoring and control module 5; the air box 1 is provided with a pressure adjustment port 11; the pressure regulator 2 is arranged in the air box 1 and is located at the pressure adjustment port 11; the connection device 3 is arranged in the air box 1 and the connection device 3 is located at the pressure adjustment port 11, and is used for connecting or closing the passage between the air box 1 and the outside; the heating system 4 is arranged in the air box 1 and is used for detecting and adjusting the surface temperature of the air box 1; the monitoring and control module 5 is respectively connected to the heating system 4 and the air box 1.

[0072] During the working process of the air box 1, the pressure regulator 2 compensates for the pressure change caused by the temperature generated by the current in the air box 1, avoiding the air leakage and failure of the air box 1 due to the pressure difference caused by the pressure change, and further preventing external water vapor from entering the inside of the air box 1 to generate condensation and cause insulation breakdown faults; if the air box 1 accidentally leaks or water vapor enters, the monitoring and control module 5 detects the temperature and humidity conditions inside and outside the air box 1 and controls the heating system 4 to increase the temperature of the surface of the air box 1 to a suitable temperature range when necessary, further preventing or eliminating the condensation on the surface of the air box 1 and improving the safety of using the air box 1; the passage between the air box 1 and the pressure regulator 2 is connected or closed through the connection device 3. When the air box 1 is in normal working process, the connection device 3 can be in an always-open state, enabling the pressure regulator 2 to timely compensate for the pressure change generated by the current during the working process in the air box 1; when the air box 1 is not working or the pressure regulator 2 leaks, the passage between the air box 1 and the outside can be quickly closed through the connection device 3 to prevent condensation, extend the service life of the air box 1 and reduce energy consumption. Closing the connection device 3 is also convenient for inflating, transporting, storing in the warehouse or overhauling the air box 1 in the factory.

[0073] Reference Figure 1 Figure 1 , as an optional implementation manner, it further includes a leakage measurement system 6. The leakage measurement system 6 is arranged in the air box 1 and is used for monitoring whether there is a leakage phenomenon in the anti-condensation system, and the leakage measurement system 6 is connected to the monitoring and control module 5.

[0074] The air pressure regulator 2 is monitored in real time by the air leakage measurement system 6 for air leakage to improve the working safety of the air tank 1; if there is no air leakage, the heating system 4 does not need to work, and the connecting device 3 can also be normally open. At this time, the anti-condensation system is simple, and the non-operation of the heating system 4 can extend the service life of the heating system 4; after the air leakage measurement system 6 detects air leakage, it transmits the air leakage information to the monitoring and control module 5, and the monitoring and control module 5 controls the heating system 4 to operate according to its own logic to prevent condensation in the air tank 1, and the connecting device 3 automatically opens or closes according to the load current situation to achieve the anti-condensation effect.

[0075] Reference Figure 1 As an optional implementation manner, it further includes a protection device 7, and the protection device 7 is arranged outside the air pressure regulator 2 and covers the air pressure regulator 2.

[0076] The air pressure regulator 2 is protected by the protection device 7 to prevent external force damage, and at the same time, it prevents the gas shock wave generated by the phase-to-phase short-circuit arcing or cable head burning in the air tank 1 caused by external force damage and discharged through the air pressure regulator 2.

[0077] As an optional implementation manner, the air pressure regulator 2 includes a breathable membrane 21 and an expander 22; the expander 22 is arranged in the air tank 1 and is located at the air pressure adjustment port 11; the breathable membrane 21 is arranged at the air pressure adjustment port 11.

[0078] The inside of the expander 22 is communicated with the air tank 1 to form a closed air chamber as the first line of defense, and the internal air pressure of the air tank 1 is compensated by the expander 22. The breathable membrane 21 is arranged at the connection between the expander 22 and the air tank 1 and is located inside the expander 22 as the second line of defense for the inside of the air tank 1; if the expander 22 is damaged and fails, the breathable membrane 21 can further block external pollutants such as dust and other solids or liquids from entering the air tank 1, and at the same time maintain normal pressure inside the air tank 1.

[0079] The expander 22 can be selected from a bellows or an airbag, and the pore size of the breathable membrane 21 can be selected as nanoscale or micron-scale.

[0080] As an optional implementation manner, the heating system 4 includes a heater 41, a first temperature sensor 42, a second temperature sensor 43 and a humidity sensor 44; wherein the heater 41 is arranged on the outer wall of the air tank 1 and is connected to the monitoring and control module 5 for adjusting the surface temperature of the air tank 1 to prevent condensation; the first temperature sensor 42 is arranged on the outer wall of the air tank 1 and is connected to the monitoring and control module 5 for detecting the surface temperature of the air tank 1; the second temperature sensor 43 is connected to the monitoring and control module 5 for detecting the external environment temperature; the humidity sensor 44 is connected to the monitoring and control module 5 for detecting the external environment humidity.

[0081] The surface temperature of the air box 1, the external environment temperature, and the external environment humidity are respectively detected by the first temperature sensor 42, the second temperature sensor 43, and the humidity sensor 44. According to the values of the surface temperature, the external environment temperature, and the external environment humidity, it is judged whether the condensation adjustment on the surface of the air box 1 is reached, and then the heater 41 is controlled to heat to eliminate or prevent condensation.

[0082] Reference Figure 1 and Figure 4 , as an optional implementation manner, the air leakage measurement system 6 includes a displacement gauge 61, a displacement auxiliary row 62, an auxiliary row guide 63, and a barometer 64; wherein the auxiliary row guide 63 is arranged outside the pressure regulator 2 and is used to guide and limit the movement of the displacement auxiliary row 62; the displacement auxiliary row 62 is connected to the pressure regulator 2, the displacement auxiliary row 62 is arranged on the auxiliary row guide 63, and the displacement auxiliary row 62 moves along the auxiliary row guide 63; the displacement gauge 61 is respectively connected to the displacement auxiliary row 62 and the monitoring and control module 5 and is used to detect the displacement value of the movement of the displacement auxiliary row 62 and transmit the value to the monitoring and control module 5; the barometer 64 is connected to the monitoring and control module 5 and is used to detect the external environment air pressure.

[0083] The displacement auxiliary row 62 moves along the auxiliary row guide 63 with the expansion or contraction of the expander 22 to generate a corresponding displacement. The displacement gauge 61 acquires the displacement data generated by the displacement auxiliary row 62 and conveys it to the monitoring and control module 5. The barometer 64 detects the external environment air pressure value and conveys it to the monitoring and control module 5. The monitoring and control module 5 judges whether there is air leakage through the displacement data and the external environment air pressure value. The structure of the air leakage measurement system 6 is simple, reliable, and low in cost.

[0084] Reference Figures 1-3 , as an optional implementation manner, the communication device 3 includes a narrow path 31 and a valve 32, wherein the narrow path 31 is arranged at the air pressure adjustment port 11; the valve 32 is arranged on the narrow path 31 and is used to open or close the narrow path 31.

[0085] As an optional implementation manner, a plurality of uniformly distributed holes 33 are arranged at the end of the narrow path 31, and the breathable film 21 covers the holes 33.

[0086] The air box 1 and the pressure regulator 2 are communicated through the narrow path 31 and the holes 33. The narrow path 31 is opened and closed by the valve 32 to meet different usage requirements; the valve 32 can be operated electrically or manually, and the operation and maintenance are convenient and simple.

[0087] Reference Figure 1 , as an optional implementation manner, anti-condensation coatings 8 are arranged on both the protection device 7 and the inner wall of the air box 1.

[0088] The anti-condensation coating 8 further prevents the water droplets generated by condensation in the protection device 7 and the gas tank 1 from entering the inside of the gas tank 1 and damaging the circuit components.

[0089] Second Embodiment:

[0090] Reference Figure 5 In this application, a second anti-condensation system is proposed. The difference between the second embodiment and the first embodiment is that the air leakage measurement system 6 is a humidity detection device 65. The humidity detection device 65 is used to measure the humidity value inside the gas tank 1. The humidity detection device 65 is connected to the monitoring and control module 5 to transmit the detected humidity value inside the gas tank 1 to the monitoring and control module 5 through the air leakage measurement system 6. If water molecules enter the inside of the gas tank 1 due to air leakage, the humidity detection device 65 can detect the humidity value inside the gas tank 1. When the humidity exceeds the set critical range, the monitoring and control module 5 issues an air leakage alarm.

[0091] The expander 22 is arranged inside the gas tank 1, which can meet the requirement of adjusting the air pressure without occupying the space outside the gas tank 1. The breathable membrane 21 is arranged at the air pressure adjustment port 11 of the gas tank 1 and is located at the air pressure adjustment port 11. The outside gas needs to pass through the breathable membrane 21 and is connected to the inside of the gas tank 1 and the expander 22 in sequence, realizing two-stage sealed filtration of the breathable membrane 21 for the inside of the gas tank 1 and the expander 22 respectively. At the same time, the outside dust and other solid impurities have acidity and alkalinity. The breathable membrane 21 can first block the dust from entering, so that the surface of the expander 22 does not come into contact with acidic and alkaline substances, and there will be no acid-base corrosion and aging, thereby improving the service life and safety stability of the expander 22.

[0092] Third Embodiment:

[0093] Reference Figure 6 In this application, a third anti-condensation system is proposed. The difference between the third embodiment and the second embodiment is that the breathable membrane 21 is arranged at the air pressure adjustment port 11 of the gas tank 1, and the expander 22 is arranged inside the gas tank 1 and is located at the air pressure adjustment port 11. At the same time, the inside of the expander 22 in the gas tank 1 is sealed, so that the outer surface of the expander 22 forms a closed air chamber with the inside of the gas tank 1, realizing the direct sealing of the expander 22 to the gas tank 1. The outside gas needs to pass through the breathable membrane 21 and is connected to the inside of the expander 22 to compensate for the air pressure inside the gas tank 1 through the expander 22.

[0094] Reference Figure 7 A leak detection method for the above anti-condensation system includes the following steps:

[0095] Set the critical value of the safety range of the absolute value of the difference between the theoretical volume and the actual volume of the pressure regulator 2 as the first fixed value;

[0096] The air leakage measurement system 6 detects the position information of the volume change of the pressure regulator 2, transmits the position information to the monitoring and control module 5, and calculates the actual volume of the pressure regulator 2.

[0097] As shown in step S101 in the figure, specifically, the displacement gauge 61 in the air leakage measurement system 6 detects the corresponding position of the displacement auxiliary row 62 with the volume change of the pressure regulator 2, transmits the position information to the monitoring and control module 5, and calculates the actual volume of the pressure regulator 2.

[0098] The calculation method of the actual volume of the pressure regulator 2: The horizontal cross-sectional area at different heights of the expander 22 remains unchanged. According to the position of the displacement auxiliary row 62 measured by the displacement gauge 61, the current height of the expander 22 is obtained, and the actual volume is the cross-sectional area multiplied by the height.

[0099] The monitoring and control module 5 detects and obtains the external air pressure value through the air leakage measurement system 6. The monitoring and control module 5 obtains the current value of the air box 1 through the air box 1, and calculates the theoretical volume of the pressure regulator 2.

[0100] The calculation method of the theoretical volume of the pressure regulator 2: According to the ideal gas state equation PV = nRT, where P is the air pressure, V is the volume, n is the number of gas molecules, R is the gas constant, and T is the temperature. There is a fixed relationship between the temperature T and the operating current in the air box 1, and this fixed relationship can be obtained through the product temperature rise test. When the expander 22 does not leak air, n and R are constants. According to the operating current, the temperature T is obtained, and the air pressure gauge 64 obtains P, then the theoretical volume V can be obtained.

[0101] As shown in step S102 in the figure, specifically, the monitoring and control module 5 detects and obtains the external air pressure value through the air pressure gauge 64 in the air leakage measurement system 6. The monitoring and control module 5 obtains the current value of the air box 1 through the air box 1, and calculates the theoretical volume of the pressure regulator 2.

[0102] As shown in step S103 in the figure, the monitoring and control module 5 compares the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator 2 with a first fixed value to determine whether the pressure regulator 2 leaks air.

[0103] As an optional implementation manner, the monitoring and control module 5 compares the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator 2 with a first fixed value to determine whether the pressure regulator 2 leaks air, including the following steps:

[0104] When the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator 2 is less than the first fixed value, it is determined that the pressure regulator 2 is operating normally.

[0105] When the absolute value of the difference between the actual volume and the theoretical volume of the pressure regulator 2 is greater than the first set value, it is determined that the pressure regulator 2 is leaking, and the monitoring and control module 5 issues an alarm of "the pressure regulator 2 is leaking".

[0106] The present application also provides a second leak detection method for the above anti-condensation system, including the following steps:

[0107] The humidity detection device 65 of the air leakage measurement system 6 detects the internal humidity value of the air tank 1 and transmits it to the monitoring and control module 5. When the humidity exceeds the set critical range humidity value, it is determined that there is a leak, and the monitoring and control module 5 issues an alarm of "the pressure regulator 2 is leaking".

[0108] Reference Figure 8 , a control method for the above anti-condensation system, including the following steps:

[0109] Set the minimum value of the operating current of the air tank 1 as the second set value, and set the critical value of the difference between the surface temperature of the air tank 1 and the condensation temperature causing condensation as the third set value;

[0110] As shown in step S201 of the figure, when the monitoring and control module 5 detects that the operating current value of the air tank 1 is less than the second set value or when the monitoring and control module 5 is powered off, the connection device 3 closes and the heating system 4 does not work;

[0111] When the monitoring and control module 5 detects that the operating current value of the air tank 1 is greater than the second set value, the valve 32 of the connection device 3 opens;

[0112] As shown in step S202 of the figure, when the valve 32 of the connection device 3 is in the open state and the monitoring and control module 5 determines that the pressure regulator 2 is operating normally, the heating system 4 does not work;

[0113] When the valve 32 of the connection device 3 is in the open state and the monitoring and control module 5 determines that the pressure regulator 2 is leaking, the heating system 4 operates to eliminate or prevent condensation;

[0114] As shown in step S203 of the figure, as an optional implementation manner, the operation steps of the heating system 4 include:

[0115] The heating system 4 respectively detects the surface temperature of the air tank 1, the external environment temperature and the external environment humidity;

[0116] As shown in step S2031 of the figure, specifically, the first temperature sensor 42 detects the surface temperature of the air tank 1, the second temperature sensor 43 detects the external environment temperature, and the humidity sensor 44 detects the external environment humidity;

[0117] The heating system 4 transmits the detected surface temperature value, external environment temperature value and external environment humidity value of the air tank 1 to the monitoring and control module 5;

[0118] The monitoring and control module 5 calculates the condensation temperature based on the external environment temperature value and the external environment humidity value;

[0119] The calculation method of the condensation temperature: Refer to the "Temperature, Humidity, Condensation Temperature Comparison Table", and obtain the condensation temperature value according to the temperature and humidity. The "Temperature, Humidity, Condensation Temperature Comparison Table" is a general comparison table and will not be elaborated here.

[0120] As shown in step S2032 of the figure, when the difference between the surface temperature value of the gas box 1 and the condensation temperature is less than the third fixed value, the heating system 4 is started to increase the temperature of the surface of the gas box 1;

[0121] When the difference between the surface temperature value of the gas box 1 and the condensation temperature is greater than the third fixed value, the heater 41 is turned off to stop increasing the temperature of the surface of the gas box 1.

[0122] In addition, it should be noted that the above-mentioned drawings are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, rather than for limiting purposes. It is easy to understand that the processes shown in the above-mentioned drawings do not indicate or limit the time sequence of these processes. Additionally, it is also easy to understand that these processes can be executed synchronously or asynchronously in, for example, multiple modules.

[0123] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. At the same time, those skilled in the art, based on the idea of the present application, the changes or deformations made in the specific implementation manner and application scope of the present application all belong to the protection scope of the present application. In summary, the content of this specification should not be construed as a limitation of the present application.

Claims

1. An anti-condensation system, characterized in that, it includes: An air box provided with a pressure adjustment port; A pressure regulator provided in the air box and located at the pressure adjustment port; A connection device provided in the air box and located at the pressure adjustment port for connecting or closing the passage between the air box and the outside; A heating system provided in the air box for detecting and adjusting the surface temperature of the air box; A monitoring and control module connected to the heating system and the air box respectively.

2. The anti-condensation system according to claim 1, characterized in that, it further includes a leak measurement system provided in the air box for monitoring whether there is a leakage phenomenon in the anti-condensation system, and the leak measurement system is connected to the monitoring and control module.

3. The anti-condensation system according to claim 1, characterized in that, it further includes a protection device provided outside the pressure regulator and covering the pressure regulator.

4. The anti-condensation system according to claim 1, characterized in that, the pressure regulator includes a breathable membrane and an expander; the expander is provided in the air box and located at the pressure adjustment port; the breathable membrane is provided at the pressure adjustment port.

5. The anti-condensation system according to claim 1, characterized in that, the heating system includes a heater, a first temperature sensor, a second temperature sensor and a humidity sensor; wherein, the heater is provided on the outer wall of the air box and connected to the monitoring and control module for adjusting the surface temperature of the air box to prevent condensation; the first temperature sensor is provided on the outer wall of the air box and connected to the monitoring and control module for detecting the surface temperature of the air box; the second temperature sensor is connected to the monitoring and control module for detecting the external environmental temperature; the humidity sensor is connected to the monitoring and control module for detecting the external environmental humidity.

6. The anti-condensation system according to any one of claims 2-5, characterized in that, the leak measurement system includes a displacement gauge, a displacement auxiliary row, an auxiliary row guide and a barometer; wherein, the auxiliary row guide is provided outside the pressure regulator for guiding and limiting the movement of the displacement auxiliary row; the displacement auxiliary row is connected to the pressure regulator, the displacement auxiliary row is provided on the auxiliary row guide, and the displacement auxiliary row moves along the auxiliary row guide; the displacement gauge is connected to the displacement auxiliary row and the monitoring and control module respectively for detecting the displacement value of the movement of the displacement auxiliary row and transmitting the value to the monitoring and control module; the barometer is connected to the monitoring and control module for detecting the external environmental pressure.

7. The anti-condensation system according to claim 4 or 5, characterized in that, the connection device includes a narrow path passage and a valve, wherein, the narrow path passage is provided at the pressure adjustment port; the valve is provided in the narrow path passage for opening or closing the narrow path passage.

8. The anti-condensation system according to claim 7, characterized in that, The end of the narrow road passage is provided with a plurality of uniformly distributed holes, and the breathable membrane covers the holes.

9. The anti-condensation system according to any one of claims 3-5, characterized in that the protective device and the inner wall of the air box are both provided with anti-condensation coatings.

10. The anti-condensation system according to any one of claims 2-5, characterized in that the air leakage measurement system includes a humidity detection device for measuring the humidity value inside the air box, and the humidity detection device is connected to the monitoring and control module.

11. A leak detection method for the anti-condensation system according to any one of claims 2-9, characterized in that it includes the following steps: Set the maximum error value of the absolute value of the difference between the theoretical volume and the actual volume of the pressure regulator as the first fixed value; The air leakage measurement system detects the position information of the volume change of the pressure regulator, transmits the position information to the monitoring and control module, and calculates the actual volume of the pressure regulator; The monitoring and control module detects and obtains the external air pressure value through the air leakage measurement system, and the monitoring and control module obtains the air box current value through the air box and calculates the theoretical volume of the pressure regulator; The monitoring and control module compares the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator with the first fixed value to determine whether the pressure regulator leaks.

12. The leak detection method according to claim 11, characterized in that The monitoring and control module compares the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator with the first fixed value to determine whether the pressure regulator leaks, including the following steps: When the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator is less than the first fixed value, it is determined that the pressure regulator is operating normally; When the absolute value of the difference between the actual volume and the theoretical volume values of the pressure regulator is greater than the first fixed value, it is determined that the pressure regulator leaks, and the monitoring and control module issues an alarm of "pressure regulator leaks".

13. A leak detection method for the anti-condensation system according to claim 10, characterized in that it includes the following steps: Detect the humidity value inside the air box through the air leakage measurement system and transmit it to the monitoring and control module. When the humidity exceeds the set critical range humidity value, it is determined that there is a leak, and the monitoring and control module issues an alarm of "pressure regulator leaks".

14. A control method for the anti-condensation system according to any one of claims 2-10, characterized in that it includes the following steps: Set the minimum operating load current value of the air box as the second fixed value, and set the temperature margin before condensation as the third fixed value; When the monitoring and control module detects that the value of the operating current of the air box is less than the second fixed value or the monitoring and control module is powered off, the connecting device closes and the heating system does not work; When the monitoring and control module detects that the value of the operating current of the air box is greater than the second fixed value, the connecting device opens; When the connecting device is in the open state and the monitoring and control module determines that the pressure regulator is operating normally, the heating system does not work; When the connecting device is in the open state and the monitoring and control module determines that the pressure regulator is leaking air, the heating system operates to eliminate or prevent condensation.

15. The control method according to claim 14, characterized in that, the operating steps of the heating system include: the heating system respectively detects the surface temperature of the air tank, the external environment temperature and the external environment humidity; the heating system transmits the detected surface temperature value, external environment temperature value and external environment humidity value of the air tank to the monitoring and control module; the monitoring and control module calculates the condensation temperature through the external environment temperature value and the external environment humidity value; when the difference between the surface temperature value of the air tank and the condensation temperature is less than a third fixed value, the heating system starts and warms up the surface of the air tank; when the difference between the surface temperature value of the air tank and the condensation temperature is greater than the third fixed value, the heater is turned off and the warming of the surface of the air tank is stopped.

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