Temperature and humidity measurement and control method for switch cabinet

Abstract

The invention discloses a temperature and humidity measurement and control method for a switch cabinet, and the method comprises the steps: obtaining the environment temperature of each plane region inside and outside the cabinet, and the environment humidity of each plane region in the cabinet; the monitoring center displays the cabinet body, the temperature and the humidity, determines whether the cooling and dehumidifying device enters the cooling work or the dehumidifying work according to the temperature inside and outside the cabinet and the humidity inside the cabinet, and sends a working signal to the monitoring center; the cooling and dehumidifying device stops working after the cooling operation or the dehumidifying work reaches the set time; the sensors and the cooling and dehumidifying device are rearranged on an existing switch cabinet, regional detection of the environment in the switch cabinet is achieved through cooperation of the multiple sensors, key cooling or dehumidifying is conducted on the area needing cooling or dehumidifying, the cooling and dehumidifying effect is good, efficiency is high, and the problems that in the prior art, detection is not accurate, and the detection accuracy is high are solved. And the problems of non-uniform heating and dehumidification and poor effect are solved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer substation safety, and in particular to a method for measuring and controlling temperature and humidity of a switch cabinet. Background Art

[0002] In the power system, switchgear is a key component of power equipment and a prerequisite for ensuring the normal operation of power. The operating environment of switchgear is complex and is greatly affected by environmental factors such as temperature and humidity. Therefore, it is necessary to monitor the switch to detect abnormal conditions in time, so as to take measures to deal with them quickly, avoid sudden equipment failures, and improve the reliability and safety of the power system.

[0003] At present, a temperature sensor and a humidity sensor are generally set in the switch cabinet to collect the temperature and humidity in the switch cabinet to monitor the switch cabinet. However, the space inside the switch cabinet is relatively large, and the temperature and humidity inside are not the same everywhere, but there are certain distribution differences. The detection method in the existing technology is inaccurate, and once the temperature or humidity is abnormal, the entire space in the switch cabinet is directly heated or dehumidified. Due to the large internal space, it is relatively wasteful and also causes uneven heating and dehumidification, and the effect is not good. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a method for measuring and controlling the temperature and humidity of a switch cabinet. By rearranging sensors and cooling and dehumidification devices on the existing switch cabinet, the environment inside the switch cabinet can be detected in different areas, and cooling or dehumidification can be performed in different areas, thereby solving the problems of inaccurate detection, uneven heating and dehumidification, and poor effect in the prior art.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a method for measuring and controlling temperature and humidity of a switch cabinet, the steps of which are: Step 1: Perform a self-check on the temperature sensor inside the cabinet, the temperature sensor outside the cabinet, the humidity sensor, and the cooling and dehumidification device.

[0006] Step 2: The temperature sensor inside the cabinet obtains the ambient temperature of each plane area inside the cabinet in real time, the temperature sensor outside the cabinet obtains the ambient temperature of each plane area outside the cabinet in real time, and the humidity sensor obtains the ambient humidity of each plane area inside the cabinet in real time, and sends the obtained ambient temperature and ambient humidity to the monitoring center via wireless; Step 3: The monitoring center displays the cabinet, ambient temperature and ambient humidity, and determines whether the ambient temperature of each plane area in the cabinet is lower than the ambient temperature of the area outside the cabinet corresponding to the plane. If it is lower, the process proceeds to step 4; if it is not lower, the process proceeds to step 5. Step 4: Determine whether the ambient temperature value of the plane area in the cabinet is less than the set value. If it is less than the set value, return to step 2. If it is not less than the set value, start the cooling and dehumidification device to cool down and send a cooling signal to the monitoring center; Step 5: Determine the dew point humidity corresponding to the ambient temperature value of the plane area in the cabinet, and determine whether the ambient humidity of the plane area in the cabinet reaches the dew point humidity. If it reaches the dew point humidity, start the cooling and dehumidification device to perform dehumidification and send a dehumidification signal to the monitoring center. If it does not reach the dew point humidity, return to step 2; Step 6: The cooling and dehumidification device stops working after the cooling or dehumidification operation reaches the set time.

[0007] Furthermore, in step one, there are at least two in-cabinet temperature sensors, out-cabinet temperature sensors and humidity sensors, the in-cabinet temperature sensors are respectively arranged at connection points of at least three planes inside the cabinet, the out-cabinet temperature sensors are respectively arranged at connection points of at least three planes outside the cabinet, and the humidity sensors are respectively arranged at connection points of at least three planes inside the cabinet.

[0008] Furthermore, in step one, the cooling and dehumidification device includes pipes, a water collecting trough, a water storage tank and a cold source. The pipes are arranged in parallel along each plane in the cabinet, and the pipes are connected to the cold source through a connecting pipe with a valve. The pipes and the connecting pipes are provided with guide grooves. The water collecting trough is laid along the lower side of the connecting pipe, and the water collecting trough is connected to the water storage tank through a gooseneck pipe.

[0009] Furthermore, in step 2, the method for obtaining the ambient temperature in the cabinet is as follows: (1) labeling each plane of the cabinet and collecting the detection values ​​of all the temperature sensors in the cabinet on the same plane; (2) After removing the maximum and minimum values, calculate the average value to obtain the ambient temperature of the plane area in the cabinet.

[0010] Furthermore, in the step 2, the method for obtaining the ambient temperature outside the cabinet is as follows: (1) labeling each plane of the cabinet and collecting the detection values ​​of all the temperature sensors outside the cabinet on the same plane; (2) After removing the maximum and minimum values, calculate the average value to obtain the ambient temperature of the flat area outside the cabinet.

[0011] Furthermore, in the step 2, the method for obtaining the humidity of the environment outside the cabinet is: (1) labeling each plane of the cabinet and collecting the detection values ​​of all humidity sensors on the same plane; (2) After removing the maximum and minimum values, calculate the average value to obtain the ambient temperature of the plane area in the cabinet.

[0012] Furthermore, in step three, the monitoring center generates a three-dimensional virtual image of the cabinet and displays it through a display, and the acquired ambient temperature and ambient humidity are marked on the corresponding plane on the cabinet.

[0013] Furthermore, in step four, the cooling process is as follows: the valve corresponding to the pipeline of the plane area that needs to be cooled is opened, and the cold source inputs the cooling medium into the pipeline through the connecting pipe to cool the plane area that needs to be cooled.

[0014] Furthermore, in the step five, the process of dehumidification is as follows: open the valve corresponding to the pipeline of the flat area that needs to be dehumidified, the cold source inputs the cooling medium into the pipeline through the connecting pipe, condenses and dehumidifies the flat area that needs to be dehumidified, and the condensed water attached to the pipeline flows along the guide groove to the connecting pipe and drips into the water collecting tank, and finally enters the water storage tank through the gooseneck pipe.

[0015] Furthermore, in step six, the monitoring center starts working timing after receiving the cooling signal or dehumidification signal, and marks the working area on the cabinet for cooling or dehumidification; when the working time reaches the set working time, the valve is closed, the cooling or dehumidification operation is stopped, and the working mark on the cooling or dehumidification area disappears.

[0016] The beneficial effects of the present invention are: 1. The present invention rearranges sensors and cooling and dehumidifying devices on the existing switch cabinet, and realizes regional detection of the environment inside the switch cabinet through the cooperation between multiple sensors, and focuses on cooling or dehumidifying the areas that need cooling or dehumidification. The cooling and dehumidification effect is good and the efficiency is high, which solves the problems of inaccurate detection, uneven heating and dehumidification, and poor effect in the prior art.

[0017] 2. In the present invention, the sensor and the cooling and dehumidifying device communicate and can be checked for normal operation to prevent inaccurate detection data caused by unexpected failures, and the inability to operate when cooling and dehumidification are required, resulting in overheating, fire, leakage, short circuit, etc. The sensor is arranged at the top corner of the cabinet, and the cabinet itself is a regular rectangular structure. The plane formed by the natural division of the cabinet is used to divide the inner and outer areas of the cabinet, and the sensor detection data is processed and calculated to eliminate abnormal data to improve the regional detection accuracy. Compared with the prior art in which one sensor measures the temperature of the entire space in the cabinet, the accuracy is higher. The pipeline laying in the cooling and dehumidifying device corresponds to the divided areas in the cabinet, and valves are provided on the pipelines in each area. Accurate cooling and dehumidification of the area are achieved by switching the valves. Although the spaces in the cabinet are interconnected, due to the uneven distribution of temperature and humidity, operations are performed directly in the area where cooling or dehumidification is required through the pipeline, which reduces the time for the air in the area where cooling or dehumidification is required to drive heat and water vapor to circulate naturally to the pipeline, thereby improving efficiency.

[0018] 3. In the present invention, the monitoring center generates a three-dimensional virtual image of the cabinet and displays it through a display. The acquired ambient temperature and ambient humidity are marked on the corresponding planes on the cabinet, which is convenient for personnel to visually observe the temperature and humidity of each area inside and outside the cabinet. At the same time, when the area is cooled or dehumidified, the working status is also marked to realize the working status indication function. In order to prevent the waste caused by the continuous cooling or dehumidification operation, the work is automatically stopped when the set working time is reached. However, if the stop working time sensor detects that the temperature and humidity are abnormal and cooling or dehumidification operations are required, the cooling and dehumidification device is restarted to continue working.

[0019] In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specifically cites preferred embodiments and describes them in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only three of the drawings in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a flowchart of the application method; Figure 2 is the electrical connection diagram of this application; Figure 3 It is a structural schematic diagram of a cooling and dehumidification device.

[0022] In the figure, 1-pipeline, 2-connecting pipe, 3-valve, 4-water collecting tank, 5-gooseneck pipe, 6-water storage tank, 7-cold source. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0025] See also Figure 1-3 , Figure 1 The present invention shows a switch cabinet temperature and humidity measurement and control method, the steps of which are: Step S1, self-check the temperature sensor inside the cabinet, the temperature sensor outside the cabinet, the humidity sensor and the cooling and dehumidification device.

[0026] Step S2: The temperature sensor inside the cabinet obtains the ambient temperature of each plane area inside the cabinet in real time, the temperature sensor outside the cabinet obtains the ambient temperature of each plane area outside the cabinet in real time, and the humidity sensor obtains the ambient humidity of each plane area inside the cabinet in real time, and sends the obtained ambient temperature and ambient humidity to the monitoring center via wireless; Step S3, the monitoring center displays the cabinet, ambient temperature and ambient humidity, and determines whether the ambient temperature of each plane area in the cabinet is lower than the ambient temperature of the area outside the cabinet corresponding to the plane. If it is lower, the process proceeds to step S4, and if it is not lower, the process proceeds to step S5; Step S4, determine whether the ambient temperature value of the plane area in the cabinet is less than the set value, if it is less than, return to step S2, if it is not less than, start the cooling and dehumidification device to cool down and send a cooling signal to the monitoring center; Step S5, determining the dew point humidity corresponding to the ambient temperature value of the plane area in the cabinet, and determining whether the ambient humidity of the plane area in the cabinet reaches the dew point humidity. If it reaches the dew point humidity, start the cooling and dehumidification device to perform dehumidification and send a dehumidification signal to the monitoring center. If it does not reach the dew point humidity, return to step S2; Step S6: The cooling and dehumidifying device stops working after the cooling or dehumidifying operation reaches the set time.

[0027] In step S1, Figure 2-3 There are at least two in-cabinet temperature sensors, out-cabinet temperature sensors and humidity sensors. The in-cabinet temperature sensors are respectively arranged at the connection points of at least three planes inside the cabinet, the out-cabinet temperature sensors are respectively arranged at the connection points of at least three planes outside the cabinet, and the humidity sensors are respectively arranged at the connection points of at least three planes inside the cabinet.

[0028] Among them, the cooling and dehumidification device includes a pipeline 1, a water collecting tank 4, a water storage tank 6 and a cold source 7. The pipeline 1 is arranged in parallel along each plane in the cabinet, and the pipeline 1 is connected with the cold source 7 through a connecting pipe 2 provided with a valve 3. The pipeline 1 and the connecting pipe 2 are provided with guide grooves. The water collecting tank 4 is laid along the lower side of the connecting pipe 2, and the water collecting tank 4 is connected with the water storage tank 6 through a gooseneck pipe 5.

[0029] In order to facilitate the smooth flow of condensed water on the top pipe 1, the pipe 1 at the top of the cabinet is in an inclined state with one end higher than the other end, so that the condensed water on the pipe 1 flows along the pipe 1; the guide groove at the water collecting tank 4 on the connecting pipe 2 faces the water collecting tank 4, which is convenient for the condensed water to fall into the water collecting tank 4; the condensed water in the water collecting tank 4 enters the water storage tank 6 through the gooseneck tube 5, so as to collect and store the condensed water. At the same time, the interior of the water storage tank 6 is only connected to the interior of the cabinet through the gooseneck tube 5, and the end of the gooseneck tube 5 also goes deep into the bottom of the water outlet tank and is submerged below the condensed water level, which plays a role of liquid seal, reducing the amount of condensed water that evaporates again and enters the cabinet through the gooseneck tube 5; a liquid level sensor can also be set inside the water storage tank 6 to remind personnel to manually discharge the condensed water after it reaches a certain height.

[0030] The cold source 7 is a device for providing low-temperature cooling medium into the pipeline 1, which can be geothermal, compressor, etc. The pipeline 1 is set in a U shape at each plane, with the two ends being water inlet and water return respectively. The pipeline 1 on the top of the cabinet is set at an angle, and the bending part is at a high place. The pipeline 1 on the side wall is set vertically, and the bending part is at the top; the diversion groove is a groove arranged along the axial direction of the pipeline 1, which is convenient for the condensed water to be collected and diverted, thereby reducing the amount of condensed water adhering to the pipeline 1.

[0031] Among them, the self-test is to check whether the wireless communication is unobstructed and whether it can work normally; to ensure normal communication and that temperature and humidity detection and cooling and dehumidification work can proceed smoothly when required.

[0032] In step S2, the ambient temperature in the cabinet is obtained by: labeling each plane of the cabinet, and collecting the detection values ​​of all temperature sensors in the cabinet on the same plane; removing the maximum and minimum values ​​and taking the average value to obtain the ambient temperature of the plane area in the cabinet.

[0033] Mark each plane of the cabinet, and carry the corresponding mark when transmitting temperature and humidity information to the monitoring center, so that the monitoring center can display the temperature and humidity information of different areas according to the mark; the cabinet is basically a rectangular structure, and the four side surfaces and one top surface are marked first. The bottom surface is marked according to the layout of the power equipment. If there is no important power equipment on the bottom surface and high temperature does not occur, the bottom surface can be left unmarked and pipeline 1 can be set, thereby reducing the detection data, reducing the amount of calculation and improving the speed.

[0034] The method for obtaining the ambient temperature outside the cabinet is as follows: label each plane of the cabinet and collect the detection values ​​of all temperature sensors outside the cabinet on the same plane; remove the maximum and minimum values ​​and calculate the average value to obtain the ambient temperature of the plane area outside the cabinet.

[0035] Mark each plane of the cabinet, and carry the corresponding mark when transmitting temperature and humidity information to the monitoring center, so that the monitoring center can display the temperature and humidity information of different areas according to the mark; the cabinet is basically a rectangular structure, and the four side surfaces and one top surface are marked first. The bottom surface is marked according to the layout of the power equipment. If there is no important power equipment on the bottom surface and high temperature does not occur, the bottom surface can be left unmarked and pipeline 1 can be set, thereby reducing the detection data, reducing the amount of calculation and improving the speed.

[0036] The method for obtaining the ambient humidity outside the cabinet is as follows: label each plane of the cabinet and collect the detection values ​​of all humidity sensors on the same plane; remove the maximum and minimum values ​​and calculate the average value to obtain the ambient temperature of the plane area in the cabinet.

[0037] Mark each plane of the cabinet, and carry the corresponding mark when transmitting temperature and humidity information to the monitoring center, so that the monitoring center can display the temperature and humidity information of different areas according to the mark; the cabinet is basically a rectangular structure, and the four side surfaces and one top surface are marked first. The bottom surface is marked according to the layout of the power equipment. If there is no important power equipment on the bottom surface and condensation will not affect the power equipment, the bottom surface can be unmarked and pipeline 1 can be set, thereby reducing the detection data, reducing the amount of calculation and improving the speed.

[0038] In step S3, the monitoring center generates a three-dimensional virtual image of the cabinet and displays it through a display, and the acquired ambient temperature and ambient humidity are marked on the corresponding planes on the cabinet.

[0039] The cabinet model is automatically generated by the monitoring center after the personnel input relevant parameters in advance, and the plane of the cabinet is marked to facilitate the correspondence with the data sent by the sensor.

[0040] In step 4, the cooling process is as follows: the valve 3 corresponding to the pipe 1 of the plane area that needs to be cooled is opened, and the cold source 7 inputs the cooling medium into the pipe 1 through the connecting pipe 2 to cool the plane area that needs to be cooled.

[0041] During cooling operation, the temperature of the cooling medium in the pipeline 1 should be the same as or slightly lower than the ambient temperature outside the cabinet, so that the temperature inside the cabinet is relatively the same as the temperature outside the cabinet, preventing the temperature inside the cabinet from being too low and the air outside the cabinet carrying water vapor into the cabinet; the condensed water formed during the cooling process will also be collected along the pipeline 1 into the water collecting trough 4, and then stored in the water storage tank 6.

[0042] In step five, the dehumidification process is as follows: the valve 3 corresponding to the pipe 1 of the flat area to be dehumidified is opened, the cold source 7 inputs the cooling medium into the pipe 1 through the connecting pipe 2, and the flat area to be dehumidified is condensed and dehumidified. The condensed water attached to the pipe 1 flows along the guide groove to the connecting pipe 2 and drips into the water collecting tank 4, and finally enters the water storage tank 6 through the gooseneck pipe 5.

[0043] During dehumidification operation, the temperature of the cooling medium in pipe 1 should be much lower than the ambient temperature outside the cabinet, so that the water vapor in the cabinet condenses on pipe 1 first.

[0044] In step six, the monitoring center starts working timing after receiving the cooling signal or dehumidification signal, and marks the working area of ​​the cooling or dehumidification plane on the cabinet; when the working time reaches the set working time, the valve 3 is closed, the cooling or dehumidification operation is stopped, and the working mark on the cooling or dehumidification plane disappears.

[0045] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, this application will not go into details.

[0046] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for measuring and controlling temperature and humidity in a switch cabinet, the steps of which are: Step 1: Perform self-test on the temperature sensor inside the cabinet, the temperature sensor outside the cabinet, the humidity sensor and the cooling and dehumidification device; Step 2: The temperature sensor inside the cabinet obtains the ambient temperature of each plane area inside the cabinet in real time, the temperature sensor outside the cabinet obtains the ambient temperature of each plane area outside the cabinet in real time, and the humidity sensor obtains the ambient humidity of each plane area inside the cabinet in real time, and sends the obtained ambient temperature and ambient humidity to the monitoring center via wireless; Step 3: The monitoring center displays the cabinet, ambient temperature and ambient humidity, and determines whether the ambient temperature of each plane area in the cabinet is lower than the ambient temperature of the area outside the cabinet corresponding to the plane. If it is lower, the process proceeds to step 4; if it is not lower, the process proceeds to step 5. Step 4: Determine whether the ambient temperature value of the plane area in the cabinet is less than the set value. If it is less than the set value, return to step 2. If it is not less than the set value, start the cooling and dehumidification device to cool down and send a cooling signal to the monitoring center; Step 5: Determine the dew point humidity corresponding to the ambient temperature value of the plane area in the cabinet, and determine whether the ambient humidity of the plane area in the cabinet reaches the dew point humidity. If it reaches the dew point humidity, start the cooling and dehumidification device to perform dehumidification and send a dehumidification signal to the monitoring center. If it does not reach the dew point humidity, return to step 2; Step 6: The cooling and dehumidification device stops working after the cooling or dehumidification operation reaches the set time.

2. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step one, there are at least two in-cabinet temperature sensors, out-cabinet temperature sensors and humidity sensors, the in-cabinet temperature sensors are respectively arranged at the connection points of at least three planes inside the cabinet, the out-cabinet temperature sensors are respectively arranged at the connection points of at least three planes outside the cabinet, and the humidity sensors are respectively arranged at the connection points of at least three planes inside the cabinet.

3. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step one, the cooling and dehumidifying device includes a pipeline, a water collecting tank, a water storage tank and a cold source. The pipeline is arranged in parallel along each plane in the cabinet, and the pipeline is connected to the cold source through a connecting pipe with a valve. The pipeline and the connecting pipe are provided with a guide groove. The water collecting tank is laid along the lower side of the connecting pipe, and the water collecting tank is connected to the water storage tank through a gooseneck pipe.

4. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step 2, the ambient temperature in the cabinet is obtained by: (1) labeling each plane of the cabinet and collecting the detection values ​​of all the temperature sensors in the cabinet on the same plane; (2) After removing the maximum and minimum values, calculate the average value to obtain the ambient temperature of the plane area in the cabinet.

5. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step 2, the method for obtaining the ambient temperature outside the cabinet is as follows: (1) labeling each plane of the cabinet and collecting the detection values ​​of all the temperature sensors outside the cabinet on the same plane; (2) After removing the maximum and minimum values, calculate the average value to obtain the ambient temperature of the flat area outside the cabinet.

6. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In the step 2, the method for obtaining the ambient humidity outside the cabinet is as follows: (1) labeling each plane of the cabinet and collecting the detection values ​​of all humidity sensors on the same plane; (2) After removing the maximum and minimum values, calculate the average value to obtain the ambient temperature of the plane area in the cabinet.

7. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In the step three, the monitoring center generates a three-dimensional virtual image of the cabinet and displays it through a display, and the acquired ambient temperature and ambient humidity are marked on the corresponding plane on the cabinet.

8. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step 4, the cooling process is as follows: the valve corresponding to the pipeline of the plane area that needs to be cooled is opened, and the cold source inputs the cooling medium into the pipeline through the connecting pipe to cool the plane area that needs to be cooled.

9. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step five, the dehumidification process is as follows: open the valve corresponding to the pipeline of the flat area that needs to be dehumidified, the cold source inputs the cooling medium into the pipeline through the connecting pipe, condenses and dehumidifies the flat area that needs to be dehumidified, and the condensed water attached to the pipeline flows along the guide groove to the connecting pipe and drips into the water collecting tank, and finally enters the water storage tank through the gooseneck pipe.

10. A switch cabinet temperature and humidity measurement and control method according to claim 1, characterized in that: In step six, the monitoring center starts working timing after receiving the cooling signal or dehumidification signal, and marks the working area of ​​the cooling or dehumidification plane on the cabinet; when the working time reaches the set working time, the valve is closed, the cooling or dehumidification operation is stopped, and the working mark on the cooling or dehumidification plane disappears.

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