CN113783112B - Self-adaptive intelligent dehumidifying and temperature controlling device - Google Patents

Abstract

The invention relates to an adaptive intelligent dehumidification and temperature control device, which includes a housing, an intake fan, a temperature and humidity detection device, a semiconductor condensation device, a heating device, an air outlet fan and a control unit, and the housing is arranged in a terminal box away from the charged equipment. Position, the upper part of the housing is provided with an air inlet, and the lower part of the side of the housing is provided with an air outlet, and the air flow channel from the air inlet to the air outlet in the housing is sequentially provided with an air intake fan, a temperature and humidity detection device, a semiconductor condensing device, a heating device and outlet fan to achieve wide-range temperature and humidity monitoring and dehumidification control; the control unit controls the automatic switching speed of the intake fan and the outlet fan to realize the temperature and humidity monitoring of the far and near areas in the terminal box; the control unit automatically controls The power consumption of the semiconductor condensing device and the heating device is adapted to the air flow rate, so as to reduce the power consumption of the semiconductor condensing device and the heating device. The device not only facilitates the dehumidification and temperature control of the terminal box, but also has low working energy consumption.

Description

An adaptive intelligent dehumidification temperature control device

technical field

The invention belongs to the technical field of dehumidification of electrical equipment, and in particular relates to an adaptive intelligent dehumidification temperature control device.

Background technique

At present, the terminal boxes commonly used in the power system have problems such as moisture and condensation, which directly affect the insulation performance of the electrical equipment in the cabinet. The reasons for condensation usually have the following points: (1) Heavy moisture and condensation at night caused by large temperature changes between day and night, especially in the rainy season, due to long-term rainfall, coupled with humid and hot weather, the operating terminal box Internal electrical components are constantly working to generate heat, causing a large amount of water vapor to condense to form dew. (2) The hole connecting the bottom of the cabinet and the cable trench is not blocked or there is a gap, so that the moisture in the cable trench is introduced into the box through the hole or gap, and it cannot be removed in time. (3) For the sake of safety protection, the terminal box is usually well sealed, but its heat dissipation is poor. With the opening of the heater in the box, the moisture evaporates into steam in the box, and the bottom, top and A large amount of condensation forms on the tank wall.

Therefore, it is of great significance to control the humidity and temperature in the box to improve the insulation performance of the electrical equipment in the terminal box. The optimum humidity of electrical equipment in the terminal box should usually be maintained between 30% and 60%. If the humidity exceeds 60%, condensation will easily form, which will adversely affect the insulation performance of electrical equipment. The hazards of condensation generation to the terminal box are mainly manifested in: 1. Moisture and condensation cause partial discharge, arcing to the ground, and phase-to-phase short circuit may also cause arcing explosion accidents, resulting in interruption of power supply and major economic losses; 2. Some The dew formed on the electrical equipment will corrode the metal parts of the control equipment, affect its service life, and lead to the failure of the monitoring control protection circuit. Therefore, it is necessary to study a device that can prevent condensation and moisture in the terminal box.

There are usually the following solutions to the humidity and condensation of terminal boxes at home and abroad: (1) use electric heaters to heat the inside of the equipment to solve the condensation phenomenon, but this method cannot fundamentally eliminate condensation, The reason is that this method only increases the degree of unsaturation of water vapor in the air, and does not discharge the water vapor in the cabinet. (2) Use moisture repellant, hang silica gel bags or other water-absorbing materials in the cabinet, but because of its limited water-absorbing effect and the absorbed water is difficult to discharge, the effect is often not obvious, and then the maintenance workload increases. (3) Using an intelligent dehumidification device is a more advanced dehumidification method at present. However, it usually only uses a simple temperature and humidity sensor with a fan dehumidifier to reduce the water vapor content in the air in the cabinet. It is limited by the detection range of the temperature and humidity sensor, and cannot adapt to the complex and changeable environment. Change the working state, resulting in failure problems , and then continue to cause the insulation capacity to decrease, which is prone to hidden dangers in the safe operation of equipment. For this reason, it is necessary to design a new solution to solve the problem of moisture and condensation in the terminal box.

Contents of the invention

The purpose of the present invention is to provide an adaptive intelligent dehumidification and temperature control device, which is not only beneficial to the dehumidification and temperature control of the terminal box, but also has low working energy consumption.

In order to achieve the above object, the technical solution adopted by the present invention is: an adaptive intelligent dehumidification temperature control device, including a housing and an air intake fan, a temperature and humidity detection device, a semiconductor condensing device, a heating device, and an air outlet fan arranged in the housing. and the control unit, the housing is arranged in the terminal box at a position away from the charged equipment, the upper part of the housing is provided with an air inlet, and the lower part of the side of the housing is provided with an air outlet, and the inside of the housing is connected to the The air inlet fan, temperature and humidity detection device, semiconductor condensing device, heating device and air outlet fan are sequentially arranged on the air flow channel to the air outlet, so as to realize wide range temperature and humidity monitoring and dehumidification control in combination with aerodynamics and fan forced flow. temperature; the control unit is electrically connected to the intake fan, temperature and humidity detection device, evaporation and condensation device, heating device, and air outlet fan;

The control unit controls the automatic switching speed of the intake fan and the outlet fan to realize the temperature and humidity monitoring of the far area and the near area in the terminal box; the control unit automatically controls the power consumption of the semiconductor condensing device and the heating device to adapt to the air flow rate , to reduce the power consumption of semiconductor condensing devices and heating devices.

Further, the air inlet is provided with a dust-proof filter.

Further, the temperature and humidity detection device includes a detection air chamber and a temperature and humidity sensor installed in the detection air chamber, the temperature and humidity sensor is electrically connected to the control unit, and the detection air chamber is located on the air flow channel to prevent incoming The air in the casing is introduced into the detection air chamber.

Further, the control unit controls the automatic switching speed of the intake fan and the outlet fan respectively based on a machine learning method, and the specific method is as follows:

Set the speed range of the fan as 0-N, the volume of the terminal box as V, the temperature inside the terminal box as T ₁ , the temperature outside the terminal box as T ₂ , and the actual humidity in the terminal box as Q, when Q>60% When the dehumidification and temperature control device works; set the minimum speed of the fan as N ₀ , satisfying 0<N ₀ <N, the collected humidity data is Q ₀ , if Q ₀ =Q, then the speed N ₀ is called the optimal speed of the fan; The mathematical model of N ₀ established by particle swarm-support vector machine is:

Since the energy consumption of the fan is proportional to its speed, the smaller N ₀ is, the smaller the energy consumption is; therefore, the optimization objective of formula (1) is expressed as:

Using the particle swarm algorithm to solve the formula (2), the optimal speed of the fan can be obtained;

Based on the above model, the control unit obtains the volume of the terminal box and the temperature inside and outside the terminal box, and can automatically determine the optimal rotation speed to realize adaptive control of the fan rotation speed.

Further, the semiconductor condensing device includes a semiconductor condenser and a piping system, the semiconductor condenser includes a cold end and a hot end, the piping system includes a condensing air pipe, and one end of the condensing air pipe communicates with the air flow channel, In order to guide the air entering the housing into the condensing air pipe, the condensing air pipe is in contact with the cold end of the semiconductor condenser for heat exchange, the condensing air pipe is connected to a drain pipe, and the other end of the condensing air pipe is connected to a gas regulator. The outlet of the gas regulator is divided into two routes, one of which enters the heating device after exchanging heat with the hot end of the semiconductor condenser, and the other directly enters the heating device to select whether the air passes through the hot end of the semiconductor condenser through the gas regulator; the control The units are electrically connected to the semiconductor condenser and the heating device respectively; the moist air passes through the cold end of the semiconductor condenser and becomes dry air, and when the dry air needs to be heated, the dry air is blown into the semiconductor condenser through the gas regulator to control it. The hot end of the condenser to absorb the heat generated by the hot end of the semiconductor condenser and reduce the energy consumption of the heating device at the same time.

Further, the control unit automatically controls the power consumption of the semiconductor condensing device to adapt to the air flow rate based on machine learning, and the specific method is:

Assuming that the gas flow rate entering the semiconductor condensing device is I, the gas humidity is Q ₀ , and the power consumption of the cold end of the semiconductor condenser is P, when Q ₀ =100%, the moist air cools down and condenses; the relationship between P, I and Q ₀ is established as follows :

The purpose of optimization is to minimize P, that is:

The control unit obtains the gas flow rate and gas humidity, and realizes the models based on formulas (3) and (4) through machine learning methods, which can automatically control the semiconductor condensing device to consume the lowest power consumption to cool the humid air and condense.

Compared with the prior art, the present invention has the following beneficial effects: It provides an adaptive intelligent dehumidification and temperature control device, which can more effectively solve the condensation and humidity problems in the terminal box. In terms of structure, according to the aerodynamic The unique structural design and the fan system combined with the temperature and humidity sensor can realize the temperature and humidity monitoring in different areas of different terminal box models, and can also be applied to structures in other confined spaces. The adoption of better semiconductor condensation devices and structures can be effective Reduce equipment size and energy consumption, and enhance its scope of application. In addition, this device is based on machine learning, enabling the device to independently control the fan system and condensation system, which has a great effect on the optimization of the detection range and the improvement of the energy consumption ratio. This device is suitable for the field of auxiliary equipment in power systems, not only for terminals The box can also be used in switch cabinets, which has certain versatility.

Description of drawings

Fig. 1 is a schematic diagram of the device structure of the embodiment of the present invention.

Fig. 2 is a schematic diagram of the air internal circulation in the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

As shown in Figure 1, this embodiment provides an adaptive intelligent dehumidification temperature control device, including a housing 1 and an intake fan 2 located in the housing 1, a temperature and humidity detection device 3, a semiconductor condensing device 4, a heating Device 5, air outlet fan 6 and control unit 7, the housing 1 is set in the terminal box away from the charged equipment, the upper part of the housing is provided with an air inlet 8, and the lower part of the side of the housing is provided with an air outlet 9. The air intake fan 2, the temperature and humidity detection device 3, the semiconductor condensation device 4, the heating device 5 and the air outlet fan 6 are sequentially arranged on the air flow channel from the air inlet to the air outlet in the housing, so as to combine gas dynamics Forced flow with the fan to realize wide-range temperature and humidity monitoring and dehumidification temperature control; the control unit 7 is electrically connected to the intake fan 2, the temperature and humidity detection device 3, the semiconductor condensation device 4, the heating device 5 and the air outlet fan 6 respectively . In this embodiment, the air inlet 8 is provided with a dustproof filter 10 .

The control unit 7 controls the speed of the intake fan 2 and the exhaust fan 6 to automatically switch, so as to realize the temperature and humidity monitoring of the far area and the near area in the terminal box, which can effectively avoid blind spots. The control unit automatically controls the power consumption of the semiconductor condensing device 4 and the heating device 5 to adapt to the air flow rate, so as to reduce the power consumption of the semiconductor condensing device and the heating device.

The structure of the device is designed according to the theory of gas dynamics (hot air flows upwards and cold air flows downwards), which can achieve better air changes and more effectively reduce the dead zone of moisture in the switchgear. In addition, as shown in Figure 2, the fan is used to expand the monitoring range, which effectively solves the dilemma that the existing temperature and humidity sensors can only monitor the temperature and humidity changes in a small range, so that the dehumidification and temperature control device can monitor the temperature and humidity in the terminal box. Make faster and better feedback on temperature and humidity conditions, and realize wide-range temperature and humidity monitoring.

In this embodiment, the temperature and humidity detection device 3 includes a detection gas chamber 301 and a temperature and humidity sensor 302 disposed in the detection gas chamber, the temperature and humidity sensor is electrically connected to the control unit, and the detection gas chamber is located in the On the air flow path, the air entering the casing is introduced into the detection air chamber.

The timing start of the air intake fan and the air outlet fan can be set according to the local temperature characteristics, that is, the local night time and sunrise time. The control unit controls the automatic switching speed of the intake fan and the outlet fan respectively based on a machine learning method, and the specific method is as follows:

Set the speed range of the fan as 0-N, the volume of the terminal box as V, the temperature inside the terminal box as T ₁ , the temperature outside the terminal box as T ₂ , and the actual humidity in the terminal box as Q, when Q>60% When the dehumidification and temperature control device works; when the speed of the fan is N, the humidity in the terminal box can be collected, but the energy consumption is large; the minimum speed of the fan is N ₀ , which satisfies 0<N ₀ <N, and the collected humidity data is Q ₀ , if Q ₀ =Q, then the speed N ₀ is called the optimal speed of the fan; based on the existing test data, the mathematical model of N ₀ established by particle swarm-support vector machine is:

Since the energy consumption of the fan is proportional to its speed, the smaller N ₀ is, the smaller the energy consumption is; therefore, the optimization objective of formula (1) is expressed as:

Using the particle swarm optimization algorithm to solve formula (2), the optimal speed of the fan can be obtained.

Based on the above model, the control unit obtains the volume of the terminal box and the temperature inside and outside the terminal box, and then automatically determines the optimal rotation speed, realizes adaptive control of the fan rotation speed, and achieves the purpose of reducing energy consumption.

In this embodiment, the semiconductor condensing device 4 includes a semiconductor condenser 401 and a piping system, the semiconductor condenser includes a cold end and a hot end, the piping system includes a condensing gas pipe 402, and one end of the condensing gas pipe is connected to The air channel is communicated to guide the air entering the housing into the condensing air pipe. The condensing air pipe is in contact with the cold end of the semiconductor condenser for heat exchange. The condensing air pipe is connected with a drain pipe 403. The condensing air pipe is also One end is connected to the gas regulator 404, and the outlet of the gas regulator is divided into two paths, one path enters the heating device after exchanging heat with the hot end of the semiconductor condenser, and the other path directly enters the heating device to select whether the air passes through the semiconductor condenser through the gas regulator. The hot end of the condenser; the control unit is electrically connected to the semiconductor condenser and the heating device respectively; the humid air passes through the cold end of the semiconductor condenser to become dry air, and the dry air passes through the gas when it needs to be heated. The regulator controls the dry air blown into the hot end of the semiconductor condenser to absorb the heat generated by the hot end of the semiconductor condenser, solve the heating problem of the semiconductor condenser, and further obtain dry hot air while reducing the energy consumption of the heating device. In addition, due to the very small thermal inertia of the semiconductor cooling chip, the cooling or heating time is very fast. When the hot end has good heat dissipation and the cold end is empty, the cooling chip can reach the maximum temperature difference in less than 1 minute after being powered on. Therefore, when the temperature is lower than 10°C, or even below 0°C, the rapid response of the semiconductor can be used to quickly switch between cooling and heating, and maintain the dehumidification capacity at low temperature, which makes up for the inability of conventional compressors to dehumidify at low temperatures. defect.

In terms of the structure of dehumidification and temperature control, when the humid air is sucked by the fan through the dust removal net, its temperature and humidity are monitored through the detection chamber in turn, and the evaporator (the cold end of the semiconductor condenser) cools down and condenses. The evaporator cooling system also has the function of adaptive control.

The control unit automatically controls the power consumption of the semiconductor condensing device to adapt to the air flow rate based on machine learning, and the specific method is:

Assuming that the gas flow rate entering the semiconductor condensing device is I, the gas humidity is Q ₀ , and the power consumption of the cold end of the semiconductor condenser is P, when Q ₀ =100%, the moist air cools down and condenses; the relationship between P, I and Q ₀ is established as follows :

The purpose of optimization is to minimize P, that is:

The control unit obtains the gas flow rate and gas humidity, and realizes the models based on formulas (3) and (4) through machine learning methods, which can automatically control the semiconductor condensing device to consume the lowest power consumption to cool the humid air and condense.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (4)

1. An adaptive intelligent dehumidification temperature control device is characterized in that it comprises a housing and an intake fan, a temperature and humidity detection device, a semiconductor condensation device, a heating device, an air outlet fan and a control unit arranged in the housing, and the housing The body is arranged in the terminal box at a position away from the charged equipment. The upper part of the housing is provided with an air inlet, and the lower part of the side of the housing is provided with an air outlet. The air flow path from the air inlet to the air outlet in the housing is The air intake fan, temperature and humidity detection device, semiconductor condensing device, heating device and air outlet fan are arranged in sequence to realize wide-range temperature and humidity monitoring and dehumidification control in combination with aerodynamics and fan forced flow; the control units are respectively Electrically connected with the intake fan, temperature and humidity detection device, evaporative condensation device, heating device, and air outlet fan; The control unit controls the automatic switching speed of the intake fan and the outlet fan to realize the temperature and humidity monitoring of the far area and the near area in the terminal box; the control unit automatically controls the power consumption of the semiconductor condensing device and the heating device to adapt to the air flow rate , to reduce the power consumption of semiconductor condensing devices and heating devices; The control unit controls the automatic switching speed of the intake fan and the outlet fan respectively based on a machine learning method, and the specific method is as follows: Set the speed range of the fan as 0-N, the volume of the terminal box as V, the temperature inside the terminal box as T ₁ , the temperature outside the terminal box as T ₂ , and the actual humidity in the terminal box as Q, when Q>60% When the dehumidification and temperature control device works; set the minimum speed of the fan as N ₀ , satisfying 0<N ₀ <N, the collected humidity data is Q ₀ , if Q ₀ =Q, then the speed N ₀ is called the optimal speed of the fan; The mathematical model of N ₀ established by particle swarm-support vector machine is: Since the energy consumption of the fan is proportional to its speed, the smaller N ₀ is, the smaller the energy consumption is; therefore, the optimization objective of formula (1) is expressed as: Using the particle swarm algorithm to solve the formula (2), the optimal speed of the fan can be obtained; Based on the above model, the control unit obtains the volume of the terminal box and the temperature inside and outside the terminal box, that is, it can automatically determine the optimal speed and realize the adaptive control of the fan speed; The control unit automatically controls the power consumption of the semiconductor condensing device to adapt to the air flow rate based on machine learning, and the specific method is: Assuming that the gas flow rate entering the semiconductor condensing device is I, the gas humidity is Q ₀ , and the power consumption of the cold end of the semiconductor condenser is P, when Q ₀ =100%, the moist air cools down and condenses; the relationship between P, I and Q ₀ is established as follows : The purpose of optimization is to minimize P, that is: The control unit obtains the gas flow rate and gas humidity, and implements the model based on formulas (3) and (4) through machine learning methods, that is, it can automatically control the semiconductor condensing device to consume the lowest power consumption to cool the humid air and condense. 2. An adaptive intelligent dehumidification and temperature control device according to claim 1, characterized in that a dust-proof filter is provided on the air inlet. 3. A self-adaptive intelligent dehumidification and temperature control device according to claim 1, characterized in that, the temperature and humidity detection device includes a detection chamber and a temperature and humidity sensor located in the detection chamber, and the temperature and humidity sensor is connected to the detection chamber. The control unit is electrically connected, and the detection air chamber is located on the air passage, so as to guide the air entering the casing into the detection air chamber. 4. A self-adaptive intelligent dehumidification and temperature control device according to claim 1, characterized in that, the semiconductor condensing device comprises a semiconductor condenser and a pipeline system, and the semiconductor condenser comprises a cold end and a hot end, so The pipeline system includes a condensing air pipe, and one end of the condensing air pipe communicates with the air flow channel to guide the air entering the housing into the condensing air pipe, and the condensing air pipe is in contact with the cold end of the semiconductor condenser for heat exchange. A drain pipe is connected to the condensing air pipe, and the other end of the condensing air pipe is connected to a gas regulator. The outlet of the gas regulator is divided into two paths, one path enters the heating device after exchanging heat with the hot end of the semiconductor condenser, and the other path directly enters the heating device. device to select whether the air passes through the hot end of the semiconductor condenser through the gas regulator; the control unit is electrically connected with the semiconductor condenser and the heating device respectively; the humid air becomes dry air through the cold end of the semiconductor condenser, When the dry air needs to be heated, the dry air is blown into the hot end of the semiconductor condenser through the gas regulator to absorb the heat generated by the hot end of the semiconductor condenser, and at the same time reduce the energy consumption of the heating device.