Device and method for controlling temperature and humidity in closed cavity

Abstract

The invention relates to the technical field of scientific research experiment temperature and humidity adjustment, in particular to a control device and method for temperature and humidity in a closed cavity, and the device comprises the closed cavity, a heating and humidifying structure, a dehumidifying structure, a control system, a first air pump, a water pump, a heat conduction copper pipe and an air bottle; the heat conduction copper pipe is arranged in the closed cavity; experimental gas is stored in the gas cylinder, and the gas cylinder is connected with the closed cavity; in the airflow direction, the closed cavity, the heating and humidifying structure and the first air pump are sequentially communicated to form a humidifying loop, and the closed cavity, the dehumidifying structure and the first air pump are sequentially communicated to form a dehumidifying loop; the heating and humidifying structure, the water pump and the heat conduction copper pipe are sequentially communicated in the water flow direction to form a heating loop. And the control system controls the closed cavity to be in a heating, humidifying or dehumidifying state. The method is used for evaluating the use performance of the industrial endoscope under different working atmospheres and different temperature and humidity conditions, and a foundation is laid for optimizing the design of the endoscope and developing the industrial endoscope with better detection performance.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature and humidity regulation in scientific research experiments, and more specifically, to a device and method for controlling temperature and humidity in a closed cavity. Background Art

[0002] High-voltage electrical equipment includes transformers, circuit breakers, gas-insulated switchgear (GIS), etc. When a high-voltage electrical equipment fails, it is difficult to detect the internal fault due to its complex internal structure and the darkroom environment of high voltage and high pressure. At present, industrial endoscopes play an increasingly important role in the detection of high-voltage electrical equipment with their advantages of non-destructive detection and intuitive observation.

[0003] Industrial endoscopes are precision instruments, and their working environment has an important impact on the accuracy and reliability of the test results. Industrial endoscopes generally work in an environment with a relative humidity of 5% to 95%. An overly humid environment may cause equipment corrosion and short circuits, while an overly dry environment may cause electrostatic interference. Therefore, it is necessary to conduct experiments to study the detection performance of industrial endoscopes under different humidity conditions, in order to lay the foundation for optimizing endoscope design and developing industrial endoscopes with better detection performance. Therefore, it is particularly important to provide a stable humidity control device for scientific research experiments related to endoscope performance testing.

[0004] The humidity control device in the prior art has an intelligent temperature and humidity controller, which can automatically detect the temperature and humidity values ​​in the environment and automatically adjust according to the set rules, thereby improving the efficiency and accuracy of the equipment. However, there are also some problems.

[0005] The patent with the authorization announcement number CN204438389U provides a temperature and humidity control device for a confined space, which can maintain constant air temperature and humidity in the confined space, and can also realize the exchange of internal and external air. It is particularly suitable for artificial incubators for plants, and can also be used in other confined spaces. However, it only adjusts the temperature and humidity through ventilation ducts, and the adjustment efficiency is low. It takes a long time to reach the required temperature and humidity; and it is only applicable to confined spaces with air as the experimental gas. When other gases are needed as experimental gases, this patent is not applicable.

[0006] The patent application with application publication number CN116908079A provides a test box with comprehensive temperature and humidity control, which includes a temperature and humidity test box, which is equipped with a faucet, three water storage containers for water supply, a water supply pipe, a water storage tank and a water supply assembly; this application tests the aging time of the raw tape in the actual use environment by controlling the temperature and humidity test box to simulate the summer and winter environment. However, the test box can only use air as the test gas.

[0007] When using an industrial endoscope to detect faults inside high-voltage electrical equipment, you may encounter a variety of different working atmospheres, such as air, nitrogen, sulfur hexafluoride, etc. These atmospheres have a certain impact on the performance and usage of the endoscope. Therefore, inventing a temperature and humidity control device in a closed cavity so that it can use air as the experimental gas and other gases as the experimental gas to perform performance testing on the industrial endoscope has become a technical problem that needs to be solved urgently. Summary of the invention

[0008] In order to solve the technical problem that the temperature and humidity control device in the prior art can only use one gas as experimental gas and cannot use multiple gases as experimental gases, the present invention provides a device and method for controlling the temperature and humidity in a closed cavity. The present invention can use both air and other gases as experimental gases.

[0009] In the first aspect, the present invention provides a device for controlling temperature and humidity in a closed cavity, and the technical solution adopted is as follows:

[0010] A device for controlling temperature and humidity in a closed cavity, comprising a closed cavity, a heating and humidifying structure, a dehumidifying structure, a control system, a first air pump, a water pump, a heat-conducting copper tube and a gas cylinder; the heat-conducting copper tube is arranged in the closed cavity; the gas cylinder 18 stores experimental gas and the gas cylinder 18 is connected to the closed cavity 11; along the airflow direction, the closed cavity, the heating and humidifying structure and the first air pump are connected in sequence to form a humidification loop, and the closed cavity, the dehumidification structure and the first air pump are connected in sequence to form a dehumidification loop; along the water flow direction, the heating and humidifying structure, the water pump and the heat-conducting copper tube are connected in sequence to form a heating loop; the control system controls the closed cavity to be in a heating state, a humidifying state or a dehumidifying state.

[0011] Preferably, a temperature and humidity sensor is further provided inside the sealed cavity, a barometer is provided outside the sealed cavity, and the temperature and humidity sensor and the barometer are electrically connected to the control system.

[0012] Preferably, the heating and humidifying structure is a closed container filled with water, the outside of the closed container is provided with an insulation sleeve, and the top of the closed container is respectively provided with an air inlet pipe, an air outlet pipe, a water inlet pipe, a water outlet pipe and a heating rod which are vertically inserted into the interior of the container; the air inlet pipe is connected to the closed cavity, and the air outlet pipe is connected to the first air pump, so that the air inlet pipe and the air outlet pipe are connected to the humidification loop; the water inlet pipe and the water outlet pipe are respectively connected to the two ends of the heat-conducting copper tube through pipes, and the water pump is provided on the pipe between the water outlet pipe and the heat-conducting copper tube; the first air pump, water pump and heating rod are respectively electrically connected to the control system.

[0013] Preferably, the air inlet end of the dehumidification structure is connected to the closed cavity, and the air outlet end of the dehumidification structure is connected to the first air pump; and the dehumidification structure is a closed container filled with water-absorbing chemicals, and the water-absorbing chemicals are anhydrous calcium chloride or color-changing silica gel.

[0014] Preferably, the gas cylinder is connected to the air inlet of the closed cavity, and a ninth valve is provided on the connecting pipe close to the gas cylinder. The experimental gas in the gas cylinder is a gas other than air and does not react with water or water-absorbing chemicals in the dehumidification structure.

[0015] Preferably, the air outlet ends of the heating and humidifying structure and the dehumidifying structure are both connected to a vacuum pump, and an eighth valve is provided on the connecting pipeline close to the vacuum pump.

[0016] Preferably, the air inlet of the sealed cavity is also connected to a second air pump, and a tenth valve is provided on the connecting pipeline close to the second air pump.

[0017] Preferably, the heating and humidifying structure 12 and the dehumidifying structure 13 are respectively connected in parallel between the closed cavity 11 and the first air pump 15 through pipes; the air outlet of the closed cavity 11 is provided with a first valve 1, and the air inlet of the closed cavity is provided with a second valve 2; the air inlet end of the dehumidifying structure 13 is provided with a fourth valve 4, and the air outlet end of the dehumidifying structure 13 is provided with a third valve 3; the air outlet end of the heating and humidifying structure 12 is provided with a fifth valve 5, the air inlet end of the heating and humidifying structure 12 is provided with a sixth valve 6, and the air inlet end of the first air pump 15 is provided with a seventh valve 7.

[0018] In a second aspect, the present invention provides a method for controlling temperature and humidity in a closed cavity, and the technical solution adopted is as follows:

[0019] A method for controlling temperature and humidity in a closed cavity, based on the device for controlling temperature and humidity in a closed cavity, specifically comprises the following steps:

[0020] Filling the sealed cavity with experimental gas and adjusting the pressure in the sealed cavity to a preset pressure; the experimental gas is air or gas in a gas cylinder;

[0021] Collect the actual temperature and humidity values ​​in the closed cavity and transmit them to the control system;

[0022] Determine the difference between the actual humidity value and the preset humidity value, and / or determine the difference between the actual temperature value and the preset temperature value, and adjust the humidity and / or temperature in the closed cavity using the control system based on the comparison result.

[0023] Preferably, the actual humidity value and the preset humidity value are judged, and when the actual humidity value is greater than the preset humidity value, the closed cavity is controlled to be in a dehumidification state; when the actual humidity value is less than the preset humidity value, the closed cavity is controlled to be in a humidification state; the actual temperature value and the preset temperature value are judged, and when the actual temperature value is less than the preset temperature value, the closed cavity is controlled to be in a heating state.

[0024] Based on the above technical solutions, the beneficial effects of the present invention are as follows:

[0025] 1. The present invention controls the humidity in the closed cavity by setting up two loops of humidification and dehumidification, and sets a first air pump to circulate the gas in the humidification or dehumidification loop, so that the closed cavity can quickly reach and maintain the humidity conditions required for the industrial endoscope performance detection experiment. The present invention can simulate various environments from extremely dry to extremely humid to evaluate the detection performance of industrial endoscopes under different humidity conditions, laying the foundation for optimizing endoscope design and developing industrial endoscopes with better detection performance, thereby further improving the accuracy of industrial endoscopes in detecting the internal status of power and electrical related equipment.

[0026] 2. The present invention provides a gas cylinder, a vacuum pump and a second gas pump, so that the closed cavity of the present invention can use air as the experimental gas, and can also use other gases other than air, such as sulfur hexafluoride, nitrogen, etc. as the experimental gas, thereby expanding the application scope of the device of the present invention. In addition, by adjusting the opening and closing of the vacuum pump or the second gas pump, the pressure in the closed cavity can be adjusted in real time.

[0027] 3. The present invention provides a heating and humidifying structure, which can not only maintain the closed cavity within a certain temperature range, but also, during heating, the increased water temperature promotes rapid volatilization of steam, so that the closed cavity quickly reaches the humidity required for the industrial endoscope detection experiment, thereby improving the humidity regulation efficiency.

[0028] In general, the device of the present invention has a simple structure, is easy to use, and has a simple control method. It is economical and practical, has a wide range of adjustable temperature and humidity, and a fast humidity adjustment speed. It can meet the control requirements of the closed cavity for different working atmospheres, temperatures, and humidity. It can be used to detect the performance of industrial endoscopes in different environments, and can also provide experimental devices for other experiments that require a certain temperature and humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structural connection of a device for controlling temperature and humidity in a closed cavity according to the present invention;

[0030] Figure 2 is a schematic diagram of a humidification loop formed in the control device of the present invention;

[0031] Figure 3is a schematic diagram of a dehumidification loop formed in the control device of the present invention;

[0032] Figure 4 is a schematic diagram of a heating loop formed in the control device of the present invention;

[0033] Figure 5 It is a control relationship diagram of the control system to some components in the control device of the present invention.

[0034] 1-first valve; 2-second valve; 3-third valve; 4-fourth valve; 5-fifth valve; 6-sixth valve; 7-seventh valve; 8-eighth valve; 9-ninth valve; 10-tenth valve; 11-sealed cavity; 12-heating and humidification structure; 13-dehumidification structure; 14-control system; 15-first air pump; 16-water pump; 17-vacuum pump; 18-gas cylinder; 19-second air pump; 20-heating rod; 21-thermal copper tube; 22-barometer; 23-temperature and humidity sensor; 24-insulation cover; 25-inlet pipe; 26-outlet pipe; 27-water inlet pipe; 28-water outlet pipe. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0036] The fiberscope-based industrial endoscope is a new type of non-destructive testing instrument that integrates optics, precision machinery, electronic technology and microscopic photography technology. It can work normally in harsh environments such as high temperature, toxic and harmful, and nuclear radiation. It can accurately and clearly detect high-voltage electrical equipment, such as gas-insulated combination electrical equipment (GIS) and the internal conditions of components, avoiding equipment disassembly and component damage during the inspection process, saving maintenance costs to a great extent and improving production efficiency.

[0037] In order to improve the detection accuracy of industrial endoscopes, it is necessary to conduct scientific research experiments on the performance of industrial endoscopes in different temperatures, humidity and working atmospheres. Based on this, the present invention provides a device and method for controlling the temperature and humidity in a closed cavity. The specific embodiments are as follows.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment provides a device for controlling temperature and humidity in a closed cavity, including a closed cavity 11, a heating and humidifying structure 12, a dehumidifying structure 13, a control system 14, a first air pump 15, a water pump 16, a heat-conducting copper tube 21 and a gas cylinder 18; the heat-conducting copper tube 21 is arranged in the closed cavity 11; the gas cylinder 18 stores experimental gas and the gas cylinder 18 is connected to the closed cavity 11; Figure 2 As shown by the thick line, along the airflow direction, the closed cavity 11, the heating and humidifying structure 12 and the first air pump 15 are connected in sequence to form a humidification loop; Figure 3 As shown by the thick line, along the airflow direction, the closed cavity 11, the dehumidification structure 13 and the first air pump 15 are connected in sequence to form a dehumidification loop; Figure 4 As shown by the thick line, along the direction of water flow, the heating and humidifying structure 12, the water pump 16 and the heat-conducting copper tube 21 are connected in sequence to form a heating loop; the control system 14 controls the closed cavity 11 to be in a heating state, a humidifying state or a dehumidifying state.

[0040] A temperature and humidity sensor 23 is also provided inside the closed cavity 11, and a barometer 22 is provided outside the closed cavity 11. The temperature and humidity sensor 23 and the barometer 22 are electrically connected to the control system 14 for transmitting the collected actual temperature value, actual humidity value and actual air pressure value to the control system.

[0041] The heating and humidifying structure 12 is a closed container filled with water, an insulation sleeve 24 is arranged outside the closed container, and an air inlet pipe 25, an air outlet pipe 26, a water inlet pipe 27, a water outlet pipe 28 and a heating rod 20 are arranged on the top of the closed container vertically inserted into the container; the air inlet pipe 25 is connected to the closed cavity 11, and the air outlet pipe 26 is connected to the first air pump 15, so that the air inlet pipe 25 and the air outlet pipe 26 are connected to the humidification loop, and the first air pump 15 is electrically connected to the control system 14, and the air inlet pipe 25 and the air outlet pipe 26 are connected to the humidification loop. The invention is used to accelerate the flow of gas in the humidification loop or the dehumidification loop to enhance the humidification or dehumidification efficiency; the water inlet pipe 27 and the water outlet pipe 28 are respectively connected to the two ends of the heat-conducting copper tube 21 through pipes, and the water pump 16 is arranged on the pipe between the water outlet pipe 28 and the heat-conducting copper tube 21, and the water pump 16 is electrically connected to the control system 14 to drive hot water to flow in the heating copper tube 21 to heat the closed cavity; the heating rod 20 is electrically connected to the control system 14 to heat the water in the closed container.

[0042] One end of the dehumidification structure 13 is connected to the closed cavity 11, and the other end is connected to the first air pump 15; and the dehumidification structure 13 is a closed container filled with a water-absorbing chemical substance, and the water-absorbing chemical substance is anhydrous calcium chloride. The dehumidification structure 13 is used to dehumidify the gas in the closed cavity.

[0043] The gas cylinder 18 is connected to the gas inlet of the closed cavity 11, and a ninth valve 9 is provided on the connecting pipe close to the gas cylinder 18. The experimental gas in the gas cylinder 18 is a gas other than air and does not react with water or water-absorbing chemicals in the dehumidification structure 13, specifically sulfur hexafluoride. When the experimental gas is sulfur hexafluoride, the ninth valve is opened, and the gas cylinder 18 provides the closed cavity 11 with the experimental gas.

[0044] The gas outlets of the heating and humidifying structure 12 and the dehumidifying structure 13 are both connected to a vacuum pump 17, and an eighth valve 8 is provided on the connecting pipe close to the vacuum pump 17. When the experimental gas is sulfur hexafluoride, the eighth valve and the vacuum pump are opened to evacuate the gas in the closed cavity.

[0045] The air inlet of the sealed cavity 11 is also connected to a second air pump 19, and a tenth valve 10 is provided on a connecting pipe close to the second air pump 19. When the experimental gas in the sealed cavity is air and the required experimental gas pressure is greater than the atmospheric pressure, the tenth valve 10 and the second air pump 19 are opened to pressurize the sealed cavity 11.

[0046] The heating and humidifying structure 12 and the dehumidifying structure 13 are respectively connected in parallel between the closed cavity 11 and the first air pump 15 through pipelines; the air outlet of the closed cavity 11 is provided with a first valve 1, and the air inlet of the closed cavity is provided with a second valve 2; the air inlet end of the dehumidifying structure 13 is provided with a fourth valve 4, and the air outlet end of the dehumidifying structure 13 is provided with a third valve 3; the air outlet end of the heating and humidifying structure 12 is provided with a fifth valve 5, the air inlet end of the heating and humidifying structure 12 is provided with a sixth valve 6, and the air inlet end of the first air pump 15 is provided with a seventh valve 7.

[0047] It should be noted that, since the present invention is used for scientific research experiments, considering that only one experiment is required at each temperature, it is only necessary to increase the temperature step by step and conduct experiments at each temperature level, so no cooling equipment is required.

[0048] Reference Figure 5 The control relationship of the device is as follows: the temperature and humidity sensor 23 and the pressure gauge 22 respectively collect the actual temperature value, the actual humidity value and the actual air pressure value in the closed cavity 11, and transmit them to the control system. The control system controls and adjusts the opening and closing of the first air pump 15, the water pump 16, the vacuum pump 17, the second air pump 19, the heating rod 20 and all valves according to the actual values ​​of the temperature, humidity and air pressure and the preset values.

[0049] Example 2

[0050] The difference between this embodiment and the first embodiment is that the water-absorbing chemical substance in the dehumidification structure 13 is color-changing silica gel, and the experimental gas in the gas cylinder 18 is nitrogen.

[0051] Example 3

[0052] This embodiment provides a method for controlling temperature and humidity in a closed cavity, which is based on a device for controlling temperature and humidity in a closed cavity provided in Embodiment 1, and the experimental gas in the closed cavity 11 is air, and the preset pressure is standard atmospheric pressure. Specifically, the method includes the following steps:

[0053] S1: The control system closes the eighth valve 8, the ninth valve 9 and the tenth valve 10, and opens the remaining valves.

[0054] S2: The temperature and humidity sensor 23 collects the actual temperature and humidity in the sealed cavity 11 and transmits them to the control system 14;

[0055] S3: The preset humidity value of the sealed cavity 11 is 95%. When the actual humidity value is higher than 95%, the sealed cavity 11 is controlled to be in a dehumidification state. The specific operation is: the control system 14 closes the fifth valve 5, the sixth valve 6, the eighth valve 8, the ninth valve 9 and the tenth valve 10, opens the remaining valves, and turns on the first air pump 15, so that the sealed cavity 11 is in a dehumidification state; when the actual humidity value is lower than 95%, the sealed cavity 11 is controlled to be in a humidification state. The specific operation is: the control system 14 closes the third valve 3, the fourth valve 4, the eighth valve 8, the ninth valve 9 and the tenth valve 10, opens the remaining valves, and turns on the first air pump 15, so that the sealed cavity 11 is in a humidification state; when the actual humidity value reaches 95%, the first air pump 15 is turned off, and all valves are closed to put the sealed cavity 11 in a closed state.

[0056] S4: The preset temperature value of the sealed cavity 11 is 50 degrees Celsius. When the actual temperature value is lower than 50 degrees Celsius, the sealed cavity 11 is controlled to be in a heating state. The specific operation is: the control system 14 turns on the heating rod 20 and the water pump 16, so that the heating and humidification structure 12, the water pump 16 and the heat-conducting copper tube 21 form a heating loop; when the actual temperature value in the sealed cavity 11 reaches 50 degrees Celsius, the heating rod 20 and the water pump 16 are turned off.

[0057] It should be noted that the order of S1 and S2 is adjustable, the order of S3 and S4 is adjustable, and the control method after adjusting the order can also meet the purpose of the present invention; in the overall process of using the method of the present invention to adjust the temperature and humidity in the closed cavity 11, the control system 14 adjusts the vacuum pump 17 or the second air pump 19 and the corresponding valve according to the actual air pressure value of the barometer 22, so that the pressure in the closed cavity 11 meets the experimental requirements.

[0058] In this embodiment, the sealed cavity 11 with adjusted temperature and humidity can be used to detect the performance of the industrial endoscope under the conditions of working atmosphere of air, temperature of 50 degrees Celsius and humidity of 95%.

[0059] Example 4

[0060] This embodiment provides a method for controlling temperature and humidity in a closed cavity, which is based on a device for controlling temperature and humidity in a closed cavity provided in Embodiment 1, and the experimental gas in the closed cavity 11 is sulfur hexafluoride, and the preset pressure is 0.5 MPa. The specific technical solution is as follows.

[0061] A method for controlling temperature and humidity in a closed cavity comprises the following steps:

[0062] S1: The control system closes the seventh valve 7, the ninth valve 9 and the tenth valve 10, opens the remaining valves, turns on the vacuum pump 17, and extracts the air in the closed cavity 11 and the pipeline. When the pressure gauge 22 reads -0.1MPa, turns off the vacuum pump 17. Then, the seventh valve 7, the eighth valve 8 and the tenth valve 10 are closed, the remaining valves are opened, and the sulfur hexafluoride gas in the gas cylinder 18 is injected into the entire experimental device. When the actual pressure value reaches the preset pressure of 0.5MPa, the ninth valve 9 is closed;

[0063] S2: The temperature and humidity sensor 23 collects the actual temperature and humidity in the sealed cavity 11 and transmits them to the control system 14;

[0064] S3: The preset humidity value of the sealed cavity 11 is 50%. When the actual humidity value is higher than 50%, the sealed cavity 11 is controlled to be in a dehumidification state. The specific operation is: the control system 14 closes the fifth valve 5, the sixth valve 6, the eighth valve 8, the ninth valve 9 and the tenth valve 10, opens the remaining valves, and turns on the first air pump 15, so that the sealed cavity 11 is in a dehumidification state; when the actual humidity value is lower than 50%, the control system 14 closes the third valve 3, the fourth valve 4, the eighth valve 8, the ninth valve 9 and the tenth valve 10, opens the remaining valves, and turns on the first air pump 15, so that the sealed cavity 11 is in a humidification state; when the actual humidity value reaches 50%, the first air pump 15 is turned off, and all valves are closed to put the sealed cavity 11 in a closed state;

[0065] S4: The preset temperature value in the sealed cavity 11 is 35 degrees Celsius. When the actual temperature value is lower than 35 degrees Celsius, the sealed cavity 11 is controlled to be in a heating state. The specific operation is: the control system 14 turns on the heating rod 20 and the water pump 16, so that the heating and humidifying structure 12, the water pump 16 and the heat-conducting copper tube 21 form a heating loop. When the temperature in the sealed cavity 11 reaches 35 degrees Celsius, the heating rod 20 and the water pump 16 are turned off;

[0066] In this embodiment, the sealed cavity 11 with adjusted temperature and humidity can be used to detect the performance of the industrial endoscope under the conditions of a working atmosphere of sulfur hexafluoride, a temperature of 35 degrees Celsius, and a humidity of 50%.

[0067] It should be noted that the order of S1 and S2 is adjustable, the order of S3 and S4 is adjustable, and the control method after adjusting the order can also meet the purpose of the present invention; and in the overall process of using the method of the present invention to adjust the temperature and humidity in the closed cavity 11, the control system 14 adjusts the vacuum pump 17 and the corresponding valve according to the actual air pressure value of the barometer 22, so that the pressure in the closed cavity 11 meets the experimental requirements.

[0068] Example 5

[0069] This embodiment provides a method for controlling temperature and humidity in a closed cavity. The control method is based on a device for controlling temperature and humidity in a closed cavity provided in Example 2, and the experimental gas in the closed cavity 11 is nitrogen, and the preset pressure value is 0.4 MPa. The specific technical solution is as follows:

[0070] A method for controlling temperature and humidity in a closed cavity comprises the following steps:

[0071] S1: The control system 14 closes the seventh valve 7, the ninth valve 9 and the tenth valve 10, opens the remaining valves, turns on the vacuum pump 17, and extracts the air in the closed cavity 11 and the pipeline. When the pressure gauge 22 reads -0.1MPa, turns off the vacuum pump 17. Then, the seventh valve 7, the eighth valve 8 and the tenth valve 10 are closed, the remaining valves are opened, and the nitrogen in the gas cylinder is injected into the entire experimental device. When the actual pressure value reaches the preset pressure value of 0.4MPa, the ninth valve 9 is closed;

[0072] S2: The temperature and humidity sensor 23 collects the actual temperature and humidity in the sealed cavity 11 and transmits them to the control system 14;

[0073] S3: The preset humidity value of the sealed cavity 11 is 5%. When the actual humidity value is higher than 5%, the sealed cavity 11 is controlled to be in a dehumidification state. The specific operation is: the control system 14 closes the fifth valve 5, the sixth valve 6, the eighth valve 8, the ninth valve 9 and the tenth valve 10, opens the remaining valves, and turns on the first air pump 15, so that the sealed cavity 11 is in a dehumidification state; when the actual humidity value is lower than 5%, the control system 14 closes the third valve 3, the fourth valve 4, the eighth valve 8, the ninth valve 9 and the tenth valve 10, opens the remaining valves, and turns on the first air pump 15, so that the sealed cavity 11 is in a humidification state; when the actual humidity value reaches the preset humidity value of 5%, the first air pump 15 is turned off, and all valves are closed to put the sealed cavity 11 in a closed state;

[0074] S4: The preset temperature value in the closed cavity 11 is 65 degrees Celsius. When the actual temperature value is lower than 65 degrees Celsius, the closed cavity 11 is controlled to be in a heating state. The specific operation is: the control system 14 turns on the heating rod 20 and the water pump 16, so that the heating and humidification structure 12, the water pump 16 and the heat-conducting copper tube 21 form a heating loop. When the temperature in the closed cavity 11 reaches 65 degrees Celsius, the heating rod 20 and the water pump 16 are turned off.

[0075] In this embodiment, the sealed cavity 11 with adjusted temperature and humidity can be used to detect the performance of the industrial endoscope under the conditions of a working atmosphere of nitrogen, a temperature of 65 degrees Celsius, and a humidity of 5%.

[0076] It should be noted that the order of S1 and S2 is adjustable, the order of S3 and S4 is adjustable, and the control method after adjusting the order can also meet the purpose of the present invention; and in the overall process of using the method of the present invention to adjust the temperature and humidity in the closed cavity 11, the control system 14 adjusts the vacuum pump 17 and the corresponding valve according to the actual air pressure value of the barometer 22, so that the pressure in the closed cavity 11 meets the experimental requirements.

[0077] In summary, the closed cavity in the device of the present invention can use air as the experimental gas, and can also use other gases other than air, such as sulfur hexafluoride, nitrogen, etc. as the experimental gas, which expands the application scope of the device of the present invention. In addition, the device and method of the present invention can enable the closed cavity to quickly reach and maintain the temperature and humidity conditions required for the performance detection experiment of the industrial endoscope, thereby providing a stable test environment for the industrial endoscope to evaluate the detection performance of the industrial endoscope under different working atmospheres and different temperature and humidity conditions, laying the foundation for optimizing the design of the endoscope and developing an industrial endoscope with better detection performance, thereby further improving the accuracy of the industrial endoscope in detecting the internal state of power and electrical related equipment.

[0078] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for controlling temperature and humidity in a closed cavity, characterized in that: The invention comprises a sealed cavity (11), a heating and humidifying structure (12), a dehumidifying structure (13), a control system (14), a first air pump (15), a water pump (16), a heat-conducting copper tube (21) and a gas cylinder (18); the heat-conducting copper tube (21) is arranged in the sealed cavity (11); the gas cylinder (18) stores experimental gas and is connected to the sealed cavity (11); along the airflow direction, the sealed cavity (11), the heating and humidifying structure (12), the dehumidifying structure (13), the control system (14), the first air pump (15), the water pump (16), a heat-conducting copper tube (21) and a gas cylinder (18); the heat-conducting copper tube (21) is arranged in the sealed cavity (11); the gas cylinder (18) stores experimental gas and the gas cylinder (18) is connected to the sealed cavity (11); The warm humidification structure (12) and the first air pump (15) are connected in sequence to form a humidification loop, and the closed cavity (11), the dehumidification structure (13) and the first air pump (15) are connected in sequence to form a dehumidification loop; along the direction of water flow, the warm humidification structure (12), the water pump (16) and the heat-conducting copper tube (21) are connected in sequence to form a warming loop; the control system (14) controls the closed cavity (11) to be in a warming state, a humidification state or a dehumidification state.

2. A device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: A temperature and humidity sensor (23) is also provided inside the sealed cavity (11), and a barometer (22) is provided outside the sealed cavity (11), and the temperature and humidity sensor (23) and the barometer (22) are electrically connected to the control system (14).

3. The device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: The heating and humidifying structure (12) is a closed container filled with water, the outside of the closed container is provided with a heat preservation sleeve (24), and the top of the closed container is respectively provided with an air inlet pipe (25), an air outlet pipe (26), a water inlet pipe (27), a water outlet pipe (28) and a heating rod (20) which are vertically inserted into the container; the air inlet pipe (25) is connected to the closed cavity (11), and the air outlet pipe (26) is connected to the first air pump (15), so that the air inlet pipe (25) and the air outlet pipe (26) are connected to the humidification loop; the water inlet pipe (27) and the water outlet pipe (28) are respectively connected to the two ends of the heat-conducting copper tube (21) through pipes, and the water pump (16) is provided on the pipe between the water outlet pipe (28) and the heat-conducting copper tube (21); the first air pump (15), the water pump (16) and the heating rod (20) are respectively electrically connected to the control system (14).

4. The device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: The air inlet end of the dehumidification structure (13) is connected to the closed cavity (11), and the air outlet end of the dehumidification structure (13) is connected to the first air pump (15); and the dehumidification structure (13) is a closed container filled with water-absorbing chemicals, and the water-absorbing chemicals are anhydrous calcium chloride or color-changing silica gel.

5. The device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: The gas cylinder (18) is connected to the air inlet of the closed cavity (11), and a ninth valve (9) is provided on the connecting pipe close to the gas cylinder (18). The experimental gas in the gas cylinder (18) is a gas other than air and does not react with water or water-absorbing chemicals in the dehumidification structure (13).

6. The device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: The air outlet ends of the heating and humidifying structure (12) and the dehumidifying structure (13) are both connected to a vacuum pump (17), and an eighth valve (8) is provided on the connecting pipeline close to the vacuum pump (17).

7. The device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: The air inlet of the sealed cavity (11) is also connected to a second air pump (19), and a tenth valve (10) is provided on a connecting pipe close to the second air pump (19).

8. The device for controlling temperature and humidity in a closed cavity according to claim 1, characterized in that: The heating and humidifying structure (12) and the dehumidifying structure (13) are respectively connected in parallel between the closed cavity (11) and the first air pump (15) through pipelines; the air outlet of the closed cavity (11) is provided with a first valve (1), and the air inlet of the closed cavity is provided with a second valve (2); the air inlet end of the dehumidifying structure (13) is provided with a fourth valve (4), and the air outlet end of the dehumidifying structure (13) is provided with a third valve (3); the air outlet end of the heating and humidifying structure (12) is provided with a fifth valve (5), the air inlet end of the heating and humidifying structure (12) is provided with a sixth valve (6), and the air inlet end of the first air pump (15) is provided with a seventh valve (7).

9. A method for controlling temperature and humidity in a closed cavity, characterized in that: A device for controlling temperature and humidity in a closed cavity according to any one of claims 1 to 8 specifically comprises the following steps: Filling the sealed cavity (11) with experimental gas, and adjusting the pressure in the sealed cavity (11) to a preset pressure; the experimental gas is air or experimental gas stored in a gas cylinder (18); Collecting the actual temperature value and the actual humidity value in the sealed cavity (11), and transmitting them to the control system (14); The difference between the actual humidity value and the preset humidity value is determined, and / or the difference between the actual temperature value and the preset temperature value is determined, and based on the comparison result, the humidity and / or temperature in the sealed cavity (11) is adjusted using the control system (14).

10. A method for controlling temperature and humidity in a closed cavity according to claim 9, characterized in that: The actual humidity value is judged to be greater than the preset humidity value, and when the actual humidity value is greater than the preset humidity value, the sealed cavity (11) is controlled to be in a dehumidification state; when the actual humidity value is less than the preset humidity value, the sealed cavity (11) is controlled to be in a humidification state; and the actual temperature value is judged to be greater than the preset temperature value, and when the actual temperature value is less than the preset temperature value, the sealed cavity (11) is controlled to be in a heating state.

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