Intelligent control method and device for power distribution cabinet

Abstract

The present invention belongs to the technical field of temperature and humidity control of power distribution cabinets, and specifically, is an intelligent control method and device for power distribution cabinets, comprising the following steps: detecting the current change passing through electrical appliances in the power distribution cabinet, and controlling the ventilation rate of ventilation units on both sides of the power distribution cabinet; detecting the temperature signal and humidity signal outside the power distribution cabinet, and controlling the conduction or closure of the inner cavity of the ventilation duct of the ventilation unit; detecting the conduction and closure signals of the ventilation duct, and controlling the operation of the active refrigeration unit on the top of the power distribution cabinet when the ventilation duct is closed; and controlling the movement of an adsorption unit arranged outside the power distribution cabinet when the ventilation duct is conducted according to the humidity signal outside the power distribution cabinet; through the coordination of the above-mentioned structures, the temperature and humidity inside the power distribution cabinet can be automatically controlled according to the external environment during actual use, and at the same time, the heating condition of the electrical appliances can be more sensitively responded to, and the protection effect of electronic components in the power distribution cabinet can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature and humidity control of a distribution cabinet, and specifically relates to an intelligent control method and device for a distribution cabinet. Background Art

[0002] A power distribution cabinet is a device used to distribute, protect and control the flow of electrical energy in a power system. It is usually composed of one or more electrical components, such as circuit breakers, contactors, fuses, power meters, etc., which are used to control and protect the circuits in the power system. A power distribution cabinet can be installed in industrial, commercial or residential buildings as needed to distribute electricity to supply various electrical equipment and systems. There are many electronic components in the power distribution cabinet, so it is necessary to control the temperature and humidity inside the power distribution cabinet when it is in use.

[0003] For example, the Chinese patent application with publication number CN116520904A discloses a method for regulating the air intake of a distribution cabinet and related devices. The method has the following steps: detecting the inquiry signal of the distribution cabinet, and establishing a communication connection with the sender of the inquiry signal of the distribution cabinet based on the detection result, and taking the sender of the inquiry signal of the distribution cabinet as the target distribution cabinet; obtaining the humidity detection signal of the distribution cabinet, and controlling the upper bidirectional fan of the distribution cabinet to exhaust air outward or inward based on the size of the humidity detection signal of the distribution cabinet; obtaining the humidity detection signal of the target distribution cabinet, and controlling the lower bidirectional fan of the distribution cabinet to exhaust air from the high humidity area to the low humidity area based on the relative size of the internal humidity of the distribution cabinet and the target distribution cabinet. This application has the advantages of improving the dehumidification capacity of the distribution cabinet and improving the overall service life of the distribution cabinet;

[0004] For example, a Chinese patent with publication number CN105929871A discloses a monitoring system for a distribution cabinet, including: a first judgment unit, used to periodically judge whether the temperature in the distribution cabinet is approaching a critical warning threshold; a cooling unit, used to control the start-up of a group of cooling devices in the distribution cabinet to cool the distribution cabinet; a temperature judgment unit, used to monitor whether the temperature of the distribution cabinet reaches below a safe temperature value range after waiting for a first preset time; a second judgment unit, used to suspend the operation of the cooling device, and monitor whether the heating rate of the distribution cabinet exceeds a preset heating rate threshold; a jump unit, used to record the total time from suspending the operation of the cooling device to the time when the temperature in the distribution cabinet approaches the critical warning threshold when the heating rate of the distribution cabinet exceeds the preset heating rate threshold; a cooling acceleration unit, used to keep the original cooling device running continuously, while starting a group of cooling devices, and jump to the temperature judgment unit.

[0005] Although the above technology can achieve cooling and dehumidification, since the distribution cabinet is used in a wide area and is sometimes used outdoors, in rainy weather, the air outside the distribution cabinet is humid. At this time, exhaust through the two-way fan will cause external humid gas to enter the distribution cabinet. At the same time, since there is air in the inner cavity of the distribution cabinet, heat will be conducted through the air inside the distribution cabinet to detect the temperature of the control cabinet, resulting in indirect temperature response and easy damage to electrical appliances.

[0006] To this end, the present invention provides an intelligent control method and device for a power distribution cabinet. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve the technical problem is: an intelligent control method of a power distribution cabinet described in the present invention comprises the following steps:

[0009] Detect the current changes passing through the electrical appliances in the distribution cabinet and control the ventilation rate of the ventilation units on both sides of the distribution cabinet;

[0010] Detect the temperature signal and humidity signal outside the power distribution cabinet, and control the conduction or closure of the ventilation duct cavity of the ventilation unit;

[0011] Detect the ventilation duct conduction and closing signals, and control the operation of the active cooling unit on the top of the power distribution cabinet when the ventilation duct is closed;

[0012] According to the humidity signal outside the power distribution cabinet, when the ventilation duct is connected, the adsorption unit arranged outside the power distribution cabinet is controlled to move;

[0013] After the adsorption unit is located in the ventilation duct, it can adsorb dust and moisture in the air flow when the ventilation duct is ventilated.

[0014] By setting up ventilation ducts that can be closed and opened to control the flow of external gas into the distribution cabinet, compared with the existing technology that simply dissipates heat through the cooperation of semiconductor refrigeration plates and fans, it can not only automatically adjust according to the external environment and adapt to more working environments, but also reduce the impact of humid air on electronic components and improve safety of use. In addition, after the ventilation ducts are closed, the high-temperature air from the outside cannot enter the inner cavity of the distribution cabinet, thereby improving the cooling effect.

[0015] The steps for controlling the ventilation rate of the ventilation units on both sides of the power distribution cabinet include:

[0016] A1. When the electrical appliance is powered on, the ventilation unit starts to ventilate;

[0017] A2. As the current through the electrical appliances increases, the ventilation rate of the ventilation unit increases;

[0018] A3. Set the extended time. When the electrical appliance is powered off, the ventilation unit stops ventilating after the extended time.

[0019] According to the rainfall and humidity in the use area, the rainfall and humidity values ​​are set, and the control methods for controlling the conduction or closure of the inner cavity of the ventilation ducts on both sides of the distribution cabinet include:

[0020] B1. When the external temperature of the power distribution cabinet is the suitable working temperature of the electrical appliances and the external humidity of the power distribution cabinet is less than the rainfall humidity value, the inner cavity of the ventilation duct is connected;

[0021] B2. When the external temperature of the power distribution cabinet does not meet the suitable working temperature of the electrical appliances, the inner cavity of the ventilation duct is closed;

[0022] B3. When the humidity outside the distribution cabinet is not less than the rainfall humidity value, the inner cavity of the ventilation duct is closed.

[0023] When the humidity and temperature of the outside air are suitable for the operation of electrical appliances, the exhaust and heat dissipation are controlled through the ventilation unit.

[0024] The active cooling unit control steps include:

[0025] C1. When the ventilation duct is closed, the refrigeration unit determines whether to cool based on the outside temperature;

[0026] C2. After the ventilation duct is opened, the refrigeration unit stops refrigerating, thereby reducing the energy consumption of the refrigeration unit.

[0027] The control methods of adsorption unit movement include:

[0028] D1. When the ventilation duct is connected, the adsorption unit is inserted into the ventilation duct; it is used to clean and dry the air entering the distribution cabinet.

[0029] D2. After the ventilation duct is closed, the adsorption unit is separated from the ventilation duct.

[0030] Through the cooperation of active cooling and ventilation units, the temperature and humidity inside the distribution cabinet can be automatically controlled according to the external environment during actual use, reducing the impact of the external environment on the electrical appliances inside the distribution cabinet.

[0031] An intelligent control device for a power distribution cabinet is applied to the intelligent control method of the power distribution cabinet mentioned above, wherein ventilation ducts are fixedly installed on the side wall of the power distribution cabinet, and the axes of the two ventilation ducts close to the open ends of the power distribution cabinet are parallel and have no intersection, that is, the two ventilation ducts are at different heights, and when the ventilation unit is ventilating, the air flows in the same direction in the two ventilation ducts. Since the two ventilation ducts are one for air intake and one for air exhaust relative to the power distribution cabinet, during actual use of this design, the gas entering one ventilation duct can be directly discharged by the other ventilation duct, thereby improving the heat dissipation effect in the structural position and improving the effect of protecting electrical appliances.

[0032] The ventilation unit includes a mounting frame and a ventilation fan. The mounting frame is fixedly installed on the inner wall of the ventilation duct, and the outer wall of the ventilation fan is fixedly connected to the inner wall of the mounting frame. The fan blades of the ventilation fan rotate to control the gas circulation inside and outside the distribution cabinet.

[0033] A current sensor for detecting current changes is provided in the power distribution cabinet, and the current sensor controls the rotation of the ventilation fan through a logic controller.

[0034] Preferably, a mounting plate is fixedly mounted on the outer wall of the ventilation duct, a closing plate and a bearing plate are slidably mounted on the inner wall of the mounting plate, and the mounting plate provides mounting and sliding space for the closing plate and the bearing plate.

[0035] The adsorption unit includes a filter layer and a drying layer. The filter layer is made of common sponge. The outside of the drying layer is non-woven fabric, and the inside of the non-woven fabric is filled with graphene desiccant. The filter layer and the drying layer are fixedly installed inside the supporting plate, and the sliding supporting plate controls the sliding of the filter layer and the drying layer.

[0036] The inner cavity of the mounting plate is connected to the inner cavity of the ventilation duct, and the outer wall of the ventilation duct is provided with a receiving portion for plugging the closing plate and the supporting plate. The closing plate is slid until the closing plate is plugged into the ventilation duct to close the ventilation duct, and the closing plate is slid to separate from the ventilation duct to connect the ventilation duct.

[0037] Preferably, a control rod is fixedly mounted on the outer wall of the mounting plate, and the control rod is a common electric telescopic rod. Two control rods are provided, wherein the movable end of one control rod is fixedly connected to the outer wall of the closing plate, and the movable end of the other control rod is fixedly connected to the outer wall of the bearing plate, and the sliding of the closing plate and the bearing plate is controlled by the control rod;

[0038] A temperature sensor and a humidity sensor are arranged at any position outside the mounting plate. The extension and retraction of the movable end of the control rod are controlled by the temperature signal and the humidity signal, and the sliding of the bearing plate is controlled by the control rod.

[0039] Preferably, the active refrigeration unit includes a refrigeration fin, a heat exchange plate and an air guide tube. The refrigeration fin is fixedly mounted on the top plate of the power distribution cabinet, the heat exchange plate is fixedly mounted inside the top plate of the power distribution cabinet, and one end is in contact with the cold end of the refrigeration fin. The heat exchange plate is made of copper plate, and multiple copper plates are parallel to each other to form a heat exchange plate. The temperature of the cold end of the refrigeration fin is transferred through the heat exchange plate. The air guide tube is fixedly mounted on the outer wall of the heat exchange plate, and a guide fan is arranged in the air guide tube. The rotation of the guide fan controls the contact between the air inside the power distribution cabinet and the heat exchange plate, thereby achieving cooling inside the power distribution cabinet. The operation of the refrigeration fin is controlled by a logic controller.

[0040] Preferably, the hot end of the refrigeration plate extends to the outside of the top plate of the distribution cabinet and is fixedly installed with a collecting bucket, which is used to collect rainwater in a high humidity environment. A sealing layer is fixedly installed on the side of the collecting bucket away from the refrigeration plate. The sealing layer is a common sponge, which can absorb and filter dust in rainwater in a high humidity environment. At the same time, on hot sunny days, it can prevent direct sunlight from shining on the hot end of the refrigeration plate, thereby achieving a protective effect. A notch for drainage is provided on one side of the collecting bucket to prevent water accumulation. The air guide tube is arranged at an angle, and a guide plate is fixedly installed on the side of the heat exchange plate away from the air guide tube. The air guide tube faces one ventilation duct, and the inclined surface of the guide plate faces another ventilation duct, so as to form internal circulating wind.

[0041] The beneficial effects of the present invention are as follows:

[0042] 1. The present invention can intuitively determine whether the electrical appliances are heating up by detecting the current changes passing through the electrical appliances in the distribution cabinet and controlling the ventilation rates of the ventilation units on both sides of the distribution cabinet. Since the ventilation and cooling can be directly controlled when the electrical appliances generate heat, the time for the electrical appliances to heat the air inside the distribution cabinet is saved. Therefore, compared with controlling the ventilation by detecting the temperature inside the distribution cabinet, the present invention can be more sensitive and improve the protection effect of the electronic components in the distribution cabinet. At the same time, through the cooperation of active refrigeration and ventilation units, the temperature and humidity inside the distribution cabinet can be automatically controlled according to the external environment during actual use, thereby reducing the influence of the external environment on the electrical appliances inside the distribution cabinet.

[0043] 2. The present invention provides an active refrigeration unit and two ventilation ducts for ventilation, that is, the two ventilation ducts have different heights. When the ventilation unit is ventilating, the air flow directions of the two ventilation ducts are the same. Since the two ventilation ducts are one for air intake and the other for air exhaust relative to the power distribution cabinet, the heat dissipation effect is improved in the structural position, and the effect of protecting electrical appliances is improved. At the same time, the two ventilation fans and the guide fans are distributed in a triangle. After the ventilation ducts are closed, the air flow inside the power distribution cabinet is disturbed, thereby facilitating the contact between cold air and heat-generating electrical appliances during refrigeration, so as to control the temperature inside the power distribution cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Figure 1 is a flow chart of controlling temperature and humidity in the present invention;

[0046] Figure 2 is a flow chart of ventilation rate control of the ventilation unit in the present invention;

[0047] Figure 3 It is a control flow chart of opening or closing the inner cavity of the ventilation duct in the present invention;

[0048] Figure 4 is a flow chart of active refrigeration unit control in the present invention;

[0049] Figure 5 is a flow chart of the motion control of the adsorption unit in the present invention;

[0050] Figure 6 It is a schematic diagram of the installation of the ventilation duct in the present invention;

[0051] Figure 7 It is a schematic diagram of the internal structure of the power distribution cabinet in the present invention;

[0052] Figure 8 It is a schematic diagram of the installation of the load-bearing plate in the present invention;

[0053] Fig. 9 It is a schematic diagram of the installation of the drying layer in the present invention;

[0054] Fig.10 It is a schematic diagram of the installation of the heat exchange plate in the present invention.

[0055] In the figure: 1. ventilation duct; 2. mounting plate; 3. sealing layer; 4. control lever; 5. heat exchange plate; 6. guide plate; 7. air guide tube; 8. refrigeration plate; 9. bearing plate; 10. sealing plate; 11. drying layer; 12. filtering layer; 13. collecting bucket. DETAILED DESCRIPTION

[0056] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0057] Embodiment 1: Figures 1 to 5 As shown, an intelligent control method of a power distribution cabinet according to an embodiment of the present invention comprises the following steps:

[0058] Detect the change of current passing through the electrical appliances in the distribution cabinet, and control the ventilation rate of the ventilation units on both sides of the distribution cabinet. The temperature inside the distribution cabinet rises because the internal energy generated by the current passing through the electrical appliances causes the electrical appliances to heat up. This heat energy is conducted through the air in the distribution cabinet, causing the distribution cabinet to heat up. Therefore, by directly detecting the current passing through the electrical appliances, it can be intuitively concluded whether the electrical appliances are hot.

[0059] Ventilation and heat dissipation are controlled by the current flow. Since ventilation and cooling can be directly controlled when the electrical appliances generate heat, the time for the electrical appliances to heat the air inside the distribution cabinet is saved. Therefore, compared with controlling ventilation by detecting the temperature inside the distribution cabinet, it can be more sensitive and improve the protection effect of electronic components in the distribution cabinet;

[0060] Detect the temperature signal and humidity signal outside the power distribution cabinet, and control the conduction or closure of the inner cavity of the ventilation duct 1 of the ventilation unit. The ventilation duct 1 is used to connect the inner cavity of the power distribution cabinet with the outside space. By detecting the temperature signal and humidity signal at the same time, it can prevent the high temperature and high humidity air from the outside from entering the power distribution cabinet during actual use, thereby taking into account the control of the temperature and humidity inside the power distribution cabinet and improving the protection effect of electronic components;

[0061] Detect the conduction and closing signals of the ventilation duct 1. When the ventilation duct 1 is closed, control the operation of the active refrigeration unit on the top of the power distribution cabinet. The active refrigeration unit is used to reduce the temperature in the power distribution cabinet.

[0062] The active cooling unit uses semiconductor cooling to cool the cabinet. When the cabinet is closed, the active cooling unit is used to cool the cabinet, thereby adjusting the temperature inside the cabinet. Compared with cooling through the interaction of internal and external air, it can provide a stable working environment for the electrical appliances in the cabinet when the outside air is hot and humid.

[0063] According to the humidity signal outside the power distribution cabinet, when the ventilation duct 1 is turned on, the adsorption unit arranged outside the power distribution cabinet is controlled to move;

[0064] After the adsorption unit is located in the ventilation duct 1, it can adsorb dust and moisture in the air flow when the ventilation duct 1 is ventilated, thereby ensuring that the air entering the power distribution cabinet is as clean and dry as possible.

[0065] In this embodiment, a ventilation duct 1 that can be closed and opened is provided to control the entry of external air into the distribution cabinet. Compared with the prior art in which heat is simply dissipated through the cooperation of semiconductor refrigeration plates and fans, it can not only automatically adjust according to the external environment and adapt to more working environments, but also reduce the impact of humid air on electronic components and improve safety of use. In addition, after the ventilation duct 1 is closed, high-temperature air from the outside cannot enter the inner cavity of the distribution cabinet, thereby improving the cooling effect.

[0066] The steps for controlling the ventilation rate of the ventilation units on both sides of the power distribution cabinet include:

[0067] A1. When the electrical appliance is powered on, the ventilation unit starts to ventilate;

[0068] A2. As the current through the electrical appliances increases, the ventilation rate of the ventilation unit increases;

[0069] A3. Set the extended time. When the electrical appliance is powered off, the ventilation unit stops ventilating after the extended time.

[0070] Among them, the increase in ventilation rate and extension time are controlled by setting a logic controller. The logic controller uses a common MCU. By setting the extension time, continuous ventilation and heat dissipation can be achieved after the electrical appliance is powered off, thereby taking away residual heat in the electrical appliance and improving the protection effect.

[0071] According to the rainfall and humidity in the use area, the rainfall and humidity value is set, and the control methods for controlling the conduction or closure of the inner cavity of the ventilation duct 1 on both sides of the power distribution cabinet include:

[0072] B1. When the external temperature of the power distribution cabinet is the suitable working temperature of the electrical appliances and the external humidity of the power distribution cabinet is less than the rainfall humidity value, the inner cavity of the ventilation duct 1 is connected;

[0073] B2. When the external temperature of the power distribution cabinet does not meet the suitable working temperature of the electrical appliances, the inner cavity of the ventilation duct 1 is closed;

[0074] B3. When the humidity outside the power distribution cabinet is not less than the rainfall humidity value, the inner cavity of ventilation duct 1 is closed.

[0075] When the humidity and temperature of the outside air are suitable for the operation of electrical appliances, the exhaust and heat dissipation are controlled through the ventilation unit.

[0076] In this embodiment, the external temperature of the distribution cabinet is higher than the maximum working temperature suitable for the electrical appliances, which is called a "high temperature environment", the external temperature of the distribution cabinet is lower than the minimum working temperature suitable for the electrical appliances, which is called a "low temperature environment", the external humidity of the distribution cabinet is the rainfall humidity value and above the rainfall humidity, which is called a "high humidity environment", and the external humidity of the distribution cabinet is lower than the rainfall humidity value, which is called a "low humidity environment". In addition, the working humidity suitable for the electrical appliances in the distribution cabinet belongs to the range of low humidity environment.

[0077] The active cooling unit control steps include:

[0078] C1. When the ventilation duct 1 is closed, the refrigeration unit determines whether to refrigerate based on the external temperature. It should be noted that the refrigeration unit refrigerates when the environment is high temperature, and stops refrigerating when the environment is low temperature;

[0079] C2. After the ventilation duct 1 is connected, the refrigeration unit stops refrigerating, thereby reducing the energy consumption of the refrigeration unit.

[0080] The control methods of adsorption unit movement include:

[0081] D1. When the ventilation duct 1 is turned on, the adsorption unit is inserted into the ventilation duct 1; it is used to clean and dry the air entering the distribution cabinet. Compared with only using the fan to ventilate and dry the internal space of the distribution cabinet, it can reduce the impact of external humidity on the internal humidity of the distribution cabinet, thereby improving the protection effect.

[0082] D2. After the ventilation duct 1 is closed, the adsorption unit is separated from the ventilation duct 1.

[0083] By coordinating the methods, it can adapt to the following usage scenarios at the same time:

[0084] High temperature and low humidity environment, at this time, the ventilation duct 1 is closed and active cooling is used for cooling;

[0085] In a high temperature and high humidity environment, the ventilation duct 1 is closed and active cooling is used for cooling;

[0086] The appliance is suitable for working temperature and low humidity environment, at this time, the ventilation duct 1 is connected, and the ventilation unit is used to dissipate heat;

[0087] The appliance is suitable for working temperature and high humidity environment, at this time, the ventilation duct 1 is closed and active cooling is used for cooling;

[0088] Low temperature and low humidity environment, at this time, the ventilation duct 1 is closed, the refrigeration unit stops refrigeration, and heat is transferred through air to achieve heat dissipation;

[0089] In a low temperature and high humidity environment, the ventilation duct 1 is closed, the refrigeration unit stops refrigeration, and heat is transferred through air to achieve heat dissipation.

[0090] In summary, through the cooperation of active cooling and ventilation units, the temperature and humidity inside the distribution cabinet can be automatically controlled according to the external environment during actual use, reducing the impact of the external environment on the electrical appliances inside the distribution cabinet.

[0091] Embodiment 2: Figures 6 to 10 As shown in Comparative Example 1, another embodiment of the present invention is:

[0092] An intelligent control device for a power distribution cabinet is applied to the intelligent control method of the power distribution cabinet mentioned above, wherein a ventilation duct 1 is fixedly installed on the side wall of the power distribution cabinet, and the axes of the two ventilation ducts 1 close to the open ends of the power distribution cabinet are parallel and have no intersection, that is, the two ventilation ducts 1 are at different heights, and when the ventilation unit is ventilating, the air flows in the same direction in the two ventilation ducts 1. Since the two ventilation ducts 1 are for air intake and exhaust respectively relative to the power distribution cabinet, during actual use of this design, the gas entering one ventilation duct 1 can be directly discharged from the other ventilation duct 1, thereby improving the heat dissipation effect in the structural position and improving the effect of protecting electrical appliances.

[0093] The ventilation unit includes a mounting frame and a ventilation fan. The mounting frame is fixedly mounted on the inner wall of the ventilation duct 1. The outer wall of the ventilation fan is fixedly connected to the inner wall of the mounting frame. The fan blades of the ventilation fan rotate to control the gas flow inside and outside the distribution cabinet, thereby realizing the implementation of step A1.

[0094] A current sensor for detecting current changes is provided in the power distribution cabinet. The current sensor controls the rotation of the ventilation fan through a logic controller, thereby implementing steps A2 and A3.

[0095] The outer wall of the ventilation duct 1 is fixedly mounted with a mounting plate 2, and the inner wall of the mounting plate 2 is slidably mounted with a closing plate 10 and a bearing plate 9, and the mounting plate 2 provides mounting and sliding space for the closing plate 10 and the bearing plate 9.

[0096] The adsorption unit includes a filter layer 12 and a drying layer 11. The filter layer 12 is made of common sponge. The outside of the drying layer 11 is non-woven fabric, and the inside of the non-woven fabric is filled with graphene desiccant. The filter layer 12 and the drying layer 11 are fixedly installed inside the supporting plate 9. The sliding supporting plate 9 controls the sliding of the filter layer 12 and the drying layer 11.

[0097] The inner cavity of the mounting plate 2 is communicated with the inner cavity of the ventilation duct 1, and the outer wall of the ventilation duct 1 is provided with a receiving portion for plugging in the closing plate 10 and the supporting plate 9. The closing plate 10 is slid until the closing plate 10 is plugged in with the ventilation duct 1 to close the ventilation duct 1, and the closing plate 10 is slid until it is separated from the ventilation duct 1 to connect the ventilation duct 1.

[0098] After the closing plate 10 is separated from the ventilation duct 1 , the sliding support plate 9 is plugged into the ventilation duct 1 , so that the air passing through the ventilation duct 1 can be dried and cleaned.

[0099] The outer wall of the mounting plate 2 is fixedly mounted with a control rod 4, which is a common electric telescopic rod. Two control rods 4 are provided, wherein the movable end of one control rod 4 is fixedly connected to the outer wall of the closing plate 10, and the movable end of the other control rod 4 is fixedly connected to the outer wall of the bearing plate 9, and the closing plate 10 and the bearing plate 9 are controlled to slide by the control rod 4;

[0100] A temperature sensor and a humidity sensor are provided at any position outside the mounting plate 2. The extension and retraction of the movable end of the control rod 4 are controlled by the temperature signal and the humidity signal, thereby realizing the implementation of steps B1, B2 and B3. At the same time, the support plate 9 is controlled to slide by the control rod 4 to realize the implementation of steps D1 and D2.

[0101] In addition, by controlling the bearing plate 9 to slide through the control rod 4 until the drying layer 11 and the filter layer 12 are retracted into the mounting plate 2, when used in combination with the high humidity environment in step B2, the contact between the high humidity air and the drying layer 11 can be reduced as much as possible, thereby protecting the drying layer 11.

[0102] When the control rod 4 controls the support plate 9 to be plugged into the ventilation duct 1, in cooperation with steps A1 to A3, air can be blown to the drying layer 11 through the ventilation fan in a low humidity environment to reduce the moisture content of the drying layer 11, thereby facilitating use when moisture absorption is required, and can be reused to increase service life.

[0103] The active refrigeration unit includes a refrigeration sheet 8, a heat exchange plate 5 and an air guide tube 7. The refrigeration sheet 8 is fixedly installed on the top plate of the distribution cabinet. The refrigeration sheet 8 is a common semiconductor refrigeration sheet, and its specific model is selected according to the volume of the distribution cabinet. The heat exchange plate 5 is fixedly installed in the top plate of the distribution cabinet, and one end is in contact with the cold end of the refrigeration sheet 8. The heat exchange plate 5 is made of copper plate, and multiple copper plates are parallel to each other to form a heat exchange plate 5. The temperature of the cold end of the refrigeration sheet 8 is transferred through the heat exchange plate 5.

[0104] The air guide tube 7 is fixedly mounted on the outer wall of the heat exchange plate 5, and a guide fan is arranged inside the air guide tube 7. The guide fan rotates to control the air inside the distribution cabinet to contact with the heat exchange plate 5, thereby realizing the cooling inside the distribution cabinet. The operation of the refrigeration plate 8 is controlled by the logic controller, thereby realizing the implementation of steps C1 and C2.

[0105] In this embodiment, the two ventilation fans and the guide fan are distributed in a triangle. After the ventilation duct 1 is closed, the air flow inside the distribution cabinet is disturbed, thereby facilitating the contact between cold air and heat-generating electrical appliances during cooling, so as to control the internal temperature of the distribution cabinet.

[0106] The hot end of the refrigeration plate 8 extends to the outside of the top plate of the power distribution cabinet, and is fixedly installed with a collecting hopper 13, which is used to collect rainwater in a high humidity environment.

[0107] A sealing layer 3 is fixedly installed on the side of the collecting hopper 13 away from the refrigeration plate 8. The sealing layer 3 is a common sponge, which can absorb and filter dust in rainwater in a high humidity environment. At the same time, on a hot sunny day, it can prevent sunlight from directly shining on the hot end of the refrigeration plate 8, thereby playing a protective effect.

[0108] A notch for drainage is provided on one side of the collecting hopper 13 to prevent water accumulation. In a high temperature and high humidity environment, rainwater contacts the hot end of the refrigeration plate 8 to facilitate heat dissipation at the hot end of the refrigeration plate 8, thereby improving the cooling effect inside the distribution cabinet.

[0109] The air guide tube 7 is tilted, and a guide plate 6 is fixedly mounted on one side of the heat exchange plate 5 away from the air guide tube 7. The air guide tube 7 faces one ventilation duct 1, and the inclined surface of the guide plate 6 faces another ventilation duct 1, so as to form internal circulating wind.

[0110] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0111] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore should not be understood as limiting the scope of protection of the present invention.

[0112] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent control method for a power distribution cabinet, characterized in that: The following steps are involved: Detect the current changes passing through the electrical appliances in the distribution cabinet and control the ventilation rate of the ventilation units on both sides of the distribution cabinet; Detecting temperature and humidity signals outside the power distribution cabinet and controlling the opening or closing of the inner cavity of the ventilation duct (1) of the ventilation unit; Detecting the on and off signals of the ventilation duct (1), and controlling the operation of the active cooling unit on the top of the power distribution cabinet when the ventilation duct (1) is closed; According to the humidity signal outside the power distribution cabinet, when the ventilation duct (1) is turned on, the adsorption unit arranged outside the power distribution cabinet is controlled to move; The ventilation duct (1) is fixedly mounted on the side wall of the power distribution cabinet, and the axes of the two ventilation ducts (1) close to the opening ends of the power distribution cabinet are parallel and have no intersection; The ventilation unit comprises a mounting frame and a ventilation fan, the mounting frame being fixedly mounted on the inner wall of the ventilation duct (1), and the outer wall of the ventilation fan being fixedly connected to the inner wall of the mounting frame; A current sensor for detecting current changes is provided in the power distribution cabinet, and the current sensor controls the rotation of the ventilation fan through a logic controller; When the ventilation unit is ventilating, the air flow directions of the two ventilation ducts (1) are the same; A mounting plate (2) is fixedly mounted on the outer wall of the ventilation duct (1), and a closing plate (10) and a bearing plate (9) are slidably mounted on the inner wall of the mounting plate (2); The adsorption unit comprises a filter layer (12) and a drying layer (11), and the filter layer (12) and the drying layer (11) are both fixedly mounted inside the carrier plate (9); the filter layer (12) is made of sponge, and the outside of the drying layer (11) is made of non-woven fabric, and the inside of the non-woven fabric is filled with graphene desiccant; The inner cavity of the mounting plate (2) is in communication with the inner cavity of the ventilation duct (1), and the outer wall of the ventilation duct (1) is provided with a receiving portion for plugging the closing plate (10) and the bearing plate (9); A control rod (4) is fixedly mounted on the outer wall of the mounting plate (2), and two control rods (4) are provided, wherein the movable end of one of the control rods (4) is fixedly connected to the outer wall of the closing plate (10), and the movable end of the other control rod (4) is fixedly connected to the outer wall of the bearing plate (9); A temperature sensor and a humidity sensor are provided at any position outside the mounting plate (2), and the extension and retraction of the movable end of the control rod (4) is controlled by the temperature signal and the humidity signal; The control rod (4) controls the bearing plate (9) to slide until the drying layer (11) and the filter layer (12) are retracted into the mounting plate (2), thereby reducing the contact between the high-humidity air and the drying layer (11), thereby protecting the drying layer (11).

2. The intelligent control method of a power distribution cabinet according to claim 1, characterized in that: The steps for controlling the ventilation rate of the ventilation units on both sides of the power distribution cabinet include: A1. When the electrical appliance is powered on, the ventilation unit starts to ventilate; A2. As the current through the electrical appliances increases, the ventilation rate of the ventilation unit increases; A3. Set the extended time. When the electrical appliance is powered off, the ventilation unit stops ventilating after the extended time.

3. The intelligent control method of a power distribution cabinet according to claim 2 is characterized in that: According to the rainfall and humidity in the use area, the rainfall and humidity value is set, and the control methods for controlling the ventilation ducts (1) on both sides of the distribution cabinet to be open or closed include: B1. When the external temperature of the power distribution cabinet is at a suitable working temperature for the electrical appliances and the external humidity of the power distribution cabinet is less than the rainfall humidity value, the inner cavity of the ventilation duct (1) is open; B2. When the external temperature of the power distribution cabinet does not meet the suitable working temperature of the electrical appliances, the inner cavity of the ventilation duct (1) is closed; B3. When the humidity outside the power distribution cabinet is not less than the rainfall humidity value, the inner cavity of the ventilation duct (1) is closed.

4. The intelligent control method of a power distribution cabinet according to claim 3 is characterized in that: The active cooling unit control steps include: C1. When the ventilation duct (1) is closed, the refrigeration unit determines whether to cool based on the outside temperature; C2. After the ventilation duct (1) is connected, the refrigeration unit stops working.

5. The intelligent control method of a power distribution cabinet according to claim 4 is characterized in that: The control methods of adsorption unit movement include: D1. When the ventilation duct (1) is turned on, the adsorption unit is inserted into the ventilation duct (1); D2. After the ventilation duct (1) is closed, the adsorption unit is separated from the ventilation duct (1).

6. An intelligent control device for a power distribution cabinet, the device being applied to the intelligent control method for a power distribution cabinet according to claim 5, characterized in that: The active refrigeration unit comprises a refrigeration fin (8), a heat exchange plate (5) and an air guide tube (7); the refrigeration fin (8) is fixedly mounted on a top plate of a power distribution cabinet; the heat exchange plate (5) is fixedly mounted inside the top plate of the power distribution cabinet, and one end of the heat exchange plate (5) is in contact with a cold end of the refrigeration fin (8); the air guide tube (7) is fixedly mounted on an outer wall of the heat exchange plate (5), and a guide fan is arranged inside the air guide tube (7).

7. The intelligent control device for a power distribution cabinet according to claim 6, characterized in that: The hot end of the refrigeration plate (8) extends to the outside of the top plate of the power distribution cabinet and is fixedly mounted with a collecting hopper (13); a sealing layer (3) is fixedly mounted on a side of the collecting hopper (13) away from the refrigeration plate (8); a notch for drainage is provided on one side of the collecting hopper (13); the air guide tube (7) is arranged at an angle; and a guide plate (6) is fixedly mounted on a side of the heat exchange plate (5) away from the air guide tube (7).

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