A dynamic dew point self-following control system and method

Abstract

The application provides a dynamic dew point self-following control system and method, through a dew point self-following control algorithm, real-time adjustment of electrode refrigeration capacity, and dynamic adjustment of temperature and humidity of an active composite particle generation area by a temperature and humidity regulation component, so that the amount of condensation water on the electrode surface is just right, thereby keeping the system in a good working state in different temperature and humidity domains, and reducing the influence of external environment changes on the release efficiency of active composite particles.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of air disinfection and purification, and particularly relates to a dynamic dew point self-following control system and method. BACKGROUND

[0002] Active composite particle technology is a new type of air disinfection technology that has emerged in recent years. The generation principle is that the water in the air is condensed on the surface of the needle electrode, and then a series of chain reactions are induced on the needle tip through the action of a high-voltage electrostatic field, and nanoscale water mist particles wrapped in active substances such as hydroxyl radicals and superoxide radicals are released. Oxygen-containing radicals have strong oxidizing properties and can rapidly oxidize microorganisms in the air, thereby achieving efficient disinfection. The entire process of generation and annihilation only produces water, which is green, environmentally friendly and non-polluting. It can continuously and actively disinfect the air in a human-machine coexistence environment. Compared with traditional disinfection methods, it has good application prospects.

[0003] In the process of generating active composite particles, water plays a crucial role and is an important factor in controlling harmful by-products (such as ozone) and extending the life of disinfecting factors. The existing technology uses a method of condensing water from the air, and the condensation effect is greatly affected by the environmental temperature and humidity. In low-temperature and low-humidity environments, it may not be able to condense water, while in high-humidity environments, it may condense too much water and cause water accumulation. This limits the optimal temperature and humidity range for the generation of active composite particles, and ozone may be produced in low-humidity conditions, posing a threat to human health. SUMMARY

[0004] To solve the above technical problems, the present application proposes a dynamic dew point self-following control system and method, which includes an active composite particle generation assembly, a control assembly, a temperature and humidity regulation assembly, and an environmental parameter sensing and feedback assembly. The system can dynamically adjust the temperature and humidity in the small area around the discharge assembly according to the external environmental parameters, so that the system can maintain good working conditions in different environments, continuously and efficiently release high-concentration active composite particles, and greatly improve the environmental adaptability of the system, thereby ensuring good air disinfection effect. The system uses a dew point self-following control algorithm to adjust the electrode refrigeration capacity in real time, and the temperature and humidity regulation assembly dynamically adjusts the temperature and humidity in the active composite particle generation area, so that the water condensation amount on the electrode surface is just right, thereby maintaining the good working condition of the system in different temperature and humidity domains, and reducing the influence of external environmental changes on the release efficiency of active composite particles.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] A dynamic dew point self-following control system comprises an active composite particle generating assembly, a control assembly, a temperature and humidity regulating assembly, and an environmental parameter sensing feedback assembly; the active composite particle generating assembly is a part where sterilization factors are generated and released, and comprises a discharge unit and a refrigeration unit; the discharge unit is a single needle discharge electrode or an arrayed discharge electrode; the refrigeration unit generates temperature drop for the electrode to make the moisture in the air condense on the surface of the electrode; the control assembly is used for analyzing the feedback environmental parameters, and then coordinating the working states of the refrigeration unit and the temperature and humidity regulating assembly according to the indication of a control algorithm; the temperature and humidity regulating assembly comprises a humidifying unit and a temperature raising unit, which are used for atomizing and humidifying and temperature adjusting of the generating area respectively; the environmental parameter sensing feedback assembly is used for collecting the temperature and humidity in the micro area and the electrode temperature, and feeding the data to the control assembly; the active composite particle generating assembly, the temperature and humidity regulating assembly, and the environmental parameter sensing feedback assembly are located inside a shell, the internal space wrapped by the shell forms a micro area, and the control assembly is located outside the shell and connected with the assemblies inside the shell.

[0007] Further, the environmental parameter sensing feedback assembly collects the electrode temperature and the environmental temperature and humidity, and feeds the data to the control assembly; the control assembly calls a dew point self-following control algorithm, calculates the target electrode temperature and the environmental temperature and humidity range, and then controls the refrigeration unit in the active composite particle generating assembly and the temperature and humidity regulating assembly to gradually adjust the electrode temperature and the environmental temperature and humidity to the target state.

[0008] The application further provides a control method of the dynamic dew point self-following control system, which adopts an open loop control and a closed loop control to control the temperature drop; the open loop control utilizes the sensing ability of the thermistor to the environmental temperature to reduce the refrigeration current, i.e., reduce the refrigeration amount, when the external temperature is low, and to increase the refrigeration current, i.e., increase the refrigeration amount, when the external temperature is high, to realize rough condensation control.

[0009] The closed loop control utilizes the sensor to collect the environmental temperature, humidity and electrode temperature data and input them to the control assembly; through the control algorithm, on one hand, the environmental temperature and humidity of the discharge area are adjusted, and on the other hand, the refrigeration current is accurately adjusted to change the surface temperature of the electrode, to realize the dew point self-following in the micro area, so that the ideal gas-liquid two-phase heat balance is achieved under various environments.

[0010] The control divides the environmental temperature and humidity range into different areas, and forms different control strategies for different areas, which are divided into the following four temperature and humidity areas:

[0011] The low temperature and low humidity area: the area with temperature ≤ 15℃ and humidity ≤ 50%; the refrigeration current is reduced to a low value to make the discharge assembly enter a non-working state, and the temperature and humidity regulating assembly is started to warm and humidify the internal area of the discharge device;

[0012] Low temperature and high humidity area: the area where the temperature is less than or equal to 15℃ and the humidity is greater than 50%; the temperature and humidity control component is started to warm the internal area of the discharge device, and intermittent refrigeration is used to avoid excessive condensation;

[0013] High temperature and low humidity area: the area where the temperature is greater than 15℃ and the humidity is less than or equal to 50%; the refrigeration capacity is increased, and the temperature and humidity control component is started to humidify the internal area of the discharge device;

[0014] High temperature and high humidity area: the area where the temperature is greater than 15℃ and the humidity is greater than 50%; according to the calculated dew point, the electrode temperature is controlled below the dew point, and intermittent refrigeration is used to avoid excessive condensation.

[0015] Further, the environmental temperature, the environmental humidity and the electrode temperature are collected at fixed interval time, and the dew point temperature is calculated according to the environmental temperature and the environmental humidity; then the temperature and humidity area is judged, and different control strategies are taken: if in the high temperature and high humidity area, the intermittent power supply mode is entered to avoid excessive condensation, and the electrode temperature is controlled below the dew point with a small decrease; if in the low temperature and high humidity area, the intermittent power supply mode is entered, the electrode temperature is decreased moderately compared with the dew point, and the heating function is started; if in the high temperature and low humidity area, the refrigeration capacity is increased, the electrode temperature is decreased greatly compared with the dew point, and the humidification function is started; if in the low temperature and low humidity area, the refrigeration unit stops working, the system is in a non-working state, and the heating and humidification functions are started.

[0016] Advantages:

[0017] Compared with the prior art, the temperature and humidity control component and the environmental parameter sensing feedback component are added on the basis of the existing active composite particle generating device, different processing strategies are taken for different temperature and humidity environmental areas through the dew point self-following control algorithm, the environmental adaptation range of the device is effectively improved, the generation of harmful substances (such as ozone) is avoided, the efficient release of active composite particles in different environments is realized, and good air disinfection effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the active composite particle generating device of the present application;

[0019] Figure 2 It is a composition principle diagram of the dynamic dew point self-following control system of the present application;

[0020] Figure 3 It is a control method principle diagram;

[0021] Figure 4 It is a control method flowchart;

[0022] In the figure: 1 - shell, 2 - active composite particle generating assembly, 3 - active composite particle release hole, 4 - humidification unit humidity supplement inlet, 5 - temperature raising unit, 6 - control assembly, 7 - environmental parameter sensing feedback assembly. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0024] The dynamic dew point self-following control system of the present application comprises an active composite particle generating device and has a corresponding control method.

[0025] As shown in Figure 1 , the active composite particle generating device comprises a shell 1, an active composite particle generating assembly 2, a control assembly 6, a temperature and humidity regulating assembly, an environmental parameter sensing feedback assembly 7 and other component units. The shell 1 can be made of glass, plastic or other materials, and the internal space wrapped by the shell forms a small area, which wraps the active composite particle generating assembly 2, the temperature and humidity regulating assembly and the environmental parameter sensing feedback assembly 7 inside the shell, and the control assembly 6 is located outside the shell 1 but connected with the remaining components inside the shell 1; the upper surface of the shell 1 is provided with an active composite particle release hole 3 opposite to the active composite particle generating assembly 2, which is a circular hole for the release of active composite particles, and the side surface is provided with a humidification unit humidity supplement inlet 4, which is a small opening as the humidity supplement inlet of the humidification unit. The active composite particle generating assembly 2 is the site of sterilization factor generation and release, and its main components are a discharge unit and a refrigeration unit. The former can be a single needle discharge electrode or an arrayed discharge electrode, and the latter produces a temperature drop on the electrode to condense the moisture in the air on the electrode surface. The control assembly 6 analyzes the feedback environmental parameters and then coordinates the working state of the refrigeration unit and the temperature and humidity regulating assembly according to the instructions of the algorithm. The temperature and humidity regulating assembly comprises a humidification unit and a temperature raising unit 5. The humidification unit is outside the shell and atomizes and humidifies the generating area through the humidification unit humidity supplement inlet 4, and the temperature raising unit is inside the shell to realize the temperature regulation function. The environmental parameter sensing feedback assembly 7 is used for collecting the temperature and humidity in the small area and sensing the electrode temperature, and feeding back the data to the control assembly 6.

[0026] As shown in Figure 2As shown, the working process of the active composite particle generating device is as follows: the environmental parameter sensing feedback assembly 7 collects the electrode temperature and the environmental temperature and humidity, transmits the data to the control assembly 6, the control assembly 6 calls the dew point self-following control algorithm, calculates the target electrode temperature and the environmental temperature and humidity range, and then controls the refrigeration unit in the active composite particle generating assembly 2 and the temperature and humidity regulating assembly, so as to gradually adjust the electrode temperature and the environmental temperature and humidity to the target state.

[0027] As shown in the figure, the control method adopts the combination of open-loop control and closed-loop control, which can more accurately control the temperature drop and realize more stable condensation effect. Figure 3

[0028] The open-loop control utilizes the sensing ability of the thermistor to the environmental temperature, reduces the refrigeration current when the external temperature is low, that is, reduces the refrigeration amount, increases the refrigeration current when the external temperature is high, that is, increases the refrigeration amount, and realizes rough condensation control.

[0029] The closed-loop control utilizes the sensors to realize real-time monitoring of the micro-area environmental temperature and humidity and real-time monitoring of the discharge electrode temperature, the sensors transmit the real-time collected data to the control assembly, through the dew point self-following control algorithm, on one hand, the environmental temperature and humidity of the discharge area are adjusted, on the other hand, the constant current source of the refrigeration unit is controlled, the refrigeration current size is accurately adjusted, so as to realize the surface temperature adjustment of the discharge electrode; at the same time, the real-time collected data of the sensors are constantly fed back to the dew point self-following control algorithm, so as to realize real-time calculation and adjustment strategy of the algorithm, form a self-adaptive and fast feedback closed-loop system, realize the dew point self-following in the micro-area, and thus realize the ideal gas-liquid two-phase heat balance in various environments.

[0030] The core of the control method is to divide the environmental temperature and humidity range into different regions, form different control strategies for different regions, and divide the regions into the following four regions:

[0031] Low temperature and low humidity area: the area with temperature ≤ 15℃ and humidity ≤ 50%. According to the principle of condensation water and dew point value calculation, it is difficult to condense water in this area, especially at zero or near zero temperature, the discharge assembly will not work normally. At this time, the refrigeration current needs to be reduced to 0A or a lower value, so that the refrigeration unit cannot work normally, the discharge assembly enters the non-working state, and the temperature and humidity regulating assembly is started to warm and humidify the internal area of the discharge device.

[0032] Low temperature and high humidity area: the area with temperature ≤ 15℃ and humidity > 50%. The characteristics of this area are that it is relatively easy to condense water, and the discharge consumes water slowly. At this time, the temperature and humidity regulating assembly is started to warm the internal area of the discharge device, and the intermittent refrigeration is adopted to avoid excessive condensation.

[0033] ​High temperature and low humidity area: the area where temperature > 15℃ and humidity ≤ 50%. The feature of this area is that it is not easy to condense water, so the refrigerating capacity needs to be increased, and the temperature and humidity control component is started to humidify the internal area of the discharge device.

[0034] High temperature and high humidity area: the area where temperature > 15℃ and humidity > 50%. The feature of this area is that it is easy to condense water, so the electrode temperature is controlled below the dew point according to the calculated dew point, and intermittent refrigeration is used to avoid excessive condensation.

[0035] As shown in Figure 4 , the algorithm collects the ambient temperature, ambient humidity and electrode temperature at fixed intervals, and calculates the dew point temperature according to the ambient temperature and ambient humidity; then judges the temperature and humidity area and takes different control strategies: if in the high temperature and high humidity area, enter the intermittent power supply mode to avoid excessive condensation, and control the electrode temperature below a certain temperature below the dew point, which is reduced by a smaller amplitude; if in the low temperature and high humidity area, enter the intermittent power supply mode, and the electrode temperature is reduced by a moderate amplitude compared with the dew point, and the heating function is started; if in the high temperature and low humidity area, the refrigerating capacity needs to be increased, the electrode temperature is reduced by a larger amplitude compared with the dew point, and the humidification function is started; if in the low temperature and low humidity area, the refrigerating unit stops working, the system is in a non-working state, and the heating and humidification functions are started.

[0036] Embodiment

[0037] The application proposes a dynamic dew point self-following control system, which is composed of an encapsulated shell 1, an active composite particle generating component 2, a temperature control component, a humidity control component, an environmental parameter sensing feedback component 7, an electrode temperature sensing component and a control component 6. The shell 1 is partially made of electrothermal glass material, which is powered by the control component and can simultaneously have the function of the temperature control component; the active composite particle generating component 2 uses a single needle discharge electrode; the humidity control component is composed of an external atomizing humidification device and its water storage structure.

[0038] The control method runs in the single-chip microcomputer of the control circuit. The algorithm collects the ambient temperature value T, the ambient humidity value H and the needle electrode temperature T0 every 1 minute, and executes a cycle every 1 minute. According to T and H, the dew point temperature LD_T is calculated, and then the temperature and humidity region is judged. In the low-temperature and low-humidity region, the refrigeration unit current is reduced to 0.1A, the system is in a non-working state, and the heating and humidifying functions are started; in the high-temperature and low-humidity region, the refrigeration capacity needs to be increased, the needle T0 is controlled to be below 10℃ below the dew point (controlled to 0℃ when less than 0℃), and the humidifying function is started; in the low-temperature and high-humidity region, in order to avoid excessive condensation, the refrigeration unit enters the intermittent power supply mode, is paused for 5 minutes every 30 minutes of work, the moderate refrigeration capacity is needed, the needle electrode temperature T0 is controlled to be below 8℃ below the dew point (controlled to 0℃ when less than 0℃), and the heating function is started; in the high-temperature and high-humidity region, the refrigeration unit also enters the intermittent power supply mode, is paused for 5 minutes every 10 minutes of work, the small refrigeration capacity is needed, and the needle electrode temperature T0 is controlled to be below 6℃ below the dew point.

[0039] Those skilled in the art will easily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dynamic dew point self-following control system, characterized by, The active composite particle generating assembly, the control assembly, the temperature and humidity control assembly, and the environmental parameter sensing feedback assembly are located inside the shell, and the internal space wrapped by the shell forms a micro area, and the control assembly is located outside the shell and connected with the assemblies inside the shell.

2. A dynamic dew point self-following control system according to claim 1, wherein, The electrode temperature and the environmental temperature and humidity are collected by the environmental parameter sensing feedback assembly and transmitted to the control assembly, the control assembly calls the dew point self-following control algorithm, calculates the target electrode temperature and the environmental temperature and humidity range, and then controls the refrigeration unit in the active composite particle generating assembly and the temperature and humidity control assembly to gradually adjust the electrode temperature and the environmental temperature and humidity to the target state.

3. The control method of a dynamic dew point self-following control system according to claim 1 or 2, characterized in that, The open-loop control and the closed-loop control are combined to control the temperature drop; the open-loop control utilizes the sensing ability of the thermistor to the environmental temperature, reduces the refrigeration current when the external temperature is low, that is, reduces the refrigeration amount, increases the refrigeration current when the external temperature is high, that is, increases the refrigeration amount, and realizes rough water condensation control; The closed-loop control utilizes the sensor to collect the environmental temperature, humidity and electrode temperature data and input them to the control assembly, and through the control algorithm, on the one hand, adjusts the environmental temperature and humidity of the discharge area, and on the other hand, accurately adjusts the refrigeration current to change the surface temperature of the electrode, realizes the dew point self-following in the micro area, and thus realizes the ideal gas-liquid two-phase thermal balance in various environments; The control method divides the environmental temperature and humidity range into different regions, forms different control strategies for different regions, and is divided into the following four temperature and humidity regions: Low temperature and low humidity region: the region with temperature ≤ 15℃ and humidity ≤ 50%; the refrigeration current is reduced to a low value, the discharge assembly enters a non-working state, and the temperature and humidity control assembly is started to warm and humidify the internal region of the discharge device; Low temperature and high humidity region: the region with temperature ≤ 15℃ and humidity > 50%; Start the temperature and humidity control assembly to warm the internal region of the discharge device, and use intermittent refrigeration to avoid excessive condensation; High temperature and low humidity region: the region with temperature > 15℃ and humidity ≤ 50%; increase the refrigeration amount, and start the temperature and humidity control assembly to humidify the internal region of the discharge device; High temperature and high humidity region: the region with temperature > 15℃ and humidity > 50%; according to the calculated dew point, the electrode temperature is controlled below the dew point, and intermittent refrigeration is used to avoid excessive condensation.

4. The control method according to claim 3, characterized by The ambient temperature, ambient humidity and electrode temperature are collected at fixed intervals, and the dew point temperature is calculated according to the ambient temperature and the ambient humidity; then the temperature and humidity area is judged, and different control strategies are taken: if in the high temperature and high humidity area, the intermittent power supply mode is entered to avoid excessive condensation, and the electrode temperature is controlled below the dew point temperature with a smaller decrease; if in the low temperature and high humidity area, the intermittent power supply mode is entered, the electrode temperature decreases moderately compared with the dew point, and the heating function is started; if in the high temperature and low humidity area, the refrigerating capacity is increased, the electrode temperature decreases greatly compared with the dew point, and the humidifying function is started; if in the low temperature and low humidity area, the refrigerating unit stops working, the system is in a non-working state, and the heating and humidifying functions are started.

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