Low-radiation plasma air purification generator and control system thereof

Abstract

The invention relates to the field of air conditioning and purification, in particular to a low-radiation plasma air purification generator and a control system thereof.According to the low-radiation plasma air purification generator and the control system thereof, through the structural design that the intensity of a three-level gradient electric field is gradually enhanced in the gas flowing direction, and in combination with an extended contact path of an S-shaped purification air duct, the air purification efficiency is improved; the reaction time and action intensity of plasma and pollutants are effectively improved, operation information is collected in real time, quantitative analysis is carried out, and operation of the air purification generator is subjected to standardized control, so that operation of the air purification generator can be automatically adjusted; the operation effect of the air purification generator is improved, ionizing radiation and ozone generation are restrained, and the air purification generator is prevented from damaging surrounding electronic equipment and the body health of people.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning and purification, and particularly to a low-radiation plasma air purification generator and its control system. Background Art

[0002] A plasma generator is a device that can generate plasma with high temperature and high energy density. The basic principle is to ionize atoms or molecules in the gas by applying a high voltage or high-frequency electromagnetic field to the gas, forming positively charged and negatively charged particles, that is, the plasma state. In this state, the particles in the gas obtain sufficient energy to carry out efficient chemical reactions or physical processes, and are widely used in fields such as air purification and sterilization; Currently, the plasma generators in traditional technologies mainly rely on dielectric barrier discharge and high-frequency high-voltage power supplies. When the plasma generator works, it will generate strong electromagnetic radiation, which may not only interfere with surrounding electronic devices, but also have an impact on human health; To reduce electromagnetic radiation, advanced electromagnetic shielding materials and technologies are usually adopted, which can effectively reduce the electromagnetic radiation leakage during the operation of the plasma generator. These shielding materials usually have high conductivity and high magnetic permeability, and can effectively absorb and reflect electromagnetic waves. However, in some special working environments with high electromagnetic fields, electromagnetic interference signals still cannot be filtered out. In addition, when the traditional plasma controller works, the dielectric barrier discharge technology will cause oxygen to be ionized, thus generating ozone, which endangers personal safety. Therefore, the research and development of low-radiation plasma generators is a hot direction in the current scientific and technological field. Summary of the Invention

[0003] In the present invention, through the structural design of gradually increasing the electric field intensity in three levels along the gas flow direction, combined with the extended contact path of the S-shaped purification air duct, the reaction time and action intensity between the plasma and pollutants are effectively improved. By collecting the operation information in real time and performing quantitative analysis, the operation of the air purification generator is standardized, so that the operation of the air purification generator can be automatically adjusted to improve the operation effect of the air purification generator; At the same time, the automatic adjustment of the pulsed electric field can suppress the generation of ionization radiation and ozone on the premise of ensuring the purification effect, avoiding damage to surrounding electronic devices and the physical health of personnel caused by the air purification generator, and to solve the problems that the plasma generator in the air purification process has high radiation and excessive ozone production, resulting in the plasma generator having an impact on surrounding electronic devices and even endangering the physical health of personnel, and a low-radiation plasma air purification generator and its control system are proposed.

[0004] The object of the present invention can be achieved by the following technical solutions: A low-radiation plasma air purification generator, including an equipment housing, wherein air inlets and air outlets are respectively provided on both sides of the equipment housing, and a multi-stage filter group and a plasma action box are installed inside the equipment housing; The multi-stage filter group is installed in the direction close to the air inlet, and the plasma action box and the multi-stage filter group are connected through a gas collection channel, and the plasma action box and the air outlet are connected through a buffer exhaust channel; A plasma controller is installed above the plasma action box, an S-shaped purification air duct is provided inside the plasma action box, and two plasma generation chambers are installed inside the plasma action box, and the tops of the two plasma generation chambers are communicated with the plasma controller; The plasma controller generates plasma and releases the plasma into the purification air duct through the plasma generation chamber. External gas enters through the air inlet, is filtered by the multi-stage filter group, and enters the purification air duct through the gas collection channel. The gas in the purification air duct is purified by the plasma released by the plasma generation chamber, and then is discharged through the buffer exhaust channel after the flow rate is reduced through the air outlet.

[0005] As a preferred embodiment of the present invention, the plasma generation chamber builds a three-stage gradient electric field in the purification air duct, and the intensity of the three-stage gradient electric field gradually increases along the gas flow direction.

[0006] The present invention also proposes a control system for a low-radiation plasma air purification generator, including a motor drive module, a purification mode control module, a sensor integration control module, and a plasma control module: The sensor integration control module can be connected to multiple sensors inside the air purification generator, collect the operation information collected by the sensors, and send the operation information to the purification mode control module; The purification mode control module performs quantitative analysis according to the operation information to obtain a control standard result, and generates a corresponding operation mode signal according to the control standard result. The purification mode control module sends the operation mode signal to the motor drive module and the plasma control module; The motor drive module and the plasma control module perform operation control according to the received operation mode signal.

[0007] As a preferred embodiment of the present invention, the operation information collected by the sensor integration control module includes PM2.5 concentration, ozone concentration, and pulse frequency, and the PM2.5 concentration collected by the sensor collection control module is the PM2.5 concentration of the gas at the air inlet position of the air purification generator; The ozone concentration collected by the sensor acquisition control module is the ozone concentration near the outer wall of the plasma generation chamber inside the purification air duct; The pulse frequency collected by the sensor integrated control module is the pulse frequency output by the plasma controller.

[0008] As a preferred embodiment of the present invention, after obtaining the operation information, the purification mode control module compares the PM2.5 concentration in the operation information with a set threshold value, obtains a high pollution concentration and a low pollution concentration according to the comparison result, and correspondingly generates a high-frequency mode signal or a low-frequency mode signal; After obtaining the ozone concentration, the purification mode control module compares the ozone concentration with a set ozone threshold value, generates an ozone increase signal or an ozone qualified signal according to the comparison result, and correspondingly generates an inhibition intervention mode signal or a non-intervention mode signal; After obtaining the pulse frequency, the purification mode control module compares the pulse frequency with a set pulse control range to confirm whether the duty cycle and pulse width of the pulse electric field are within the set pulse control range. If they are within the pulse control range, a pulse normal signal is generated. If they are not within the pulse control range, a pulse compensation signal is generated.

[0009] As a preferred embodiment of the present invention, after obtaining the high-frequency mode signal or the inhibition intervention mode signal, the motor drive module increases the motor operating speed to increase the air intake of the air purification generator. After simultaneously obtaining the low-frequency mode signal and the non-intervention mode signal, the motor drive module reduces the motor operating speed to reduce the air intake of the air purification generator. The motor operating speed has a minimum value, and when the minimum value is reached, the motor operating speed is not reduced; After increasing the motor operating speed, the motor drive module obtains the PM2.5 concentration change and the ozone concentration change amount through the sensor integrated control module, and performs a weighted comparison of the PM2.5 concentration change and the ozone concentration change with the increase in the motor operating speed, and adjusts the increase or decrease amount of the motor operating speed according to the comparison.

[0010] As a preferred embodiment of the present invention, after obtaining the high-frequency mode signal, the plasma control module controls the electric field frequency to switch to high frequency. After obtaining the low-frequency mode signal, the plasma control module controls the electric field frequency to switch to low frequency; After obtaining the inhibition intervention mode signal, the plasma control module adjusts the duty cycle of the electric field pulse to increase the duty cycle of the electric field pulse. After obtaining the non-intervention mode signal, the plasma control module does not respond; After obtaining the pulse compensation signal, the plasma control module quantitatively adjusts the pulse frequency of the pulsed electric field. After the quantitative adjustment, it confirms whether the pulse compensation signal disappears. If the pulse compensation signal disappears, the adjustment ends. If the pulse compensation signal does not disappear, an abnormal warning is issued.

[0011] As a preferred embodiment of the present invention, the purification mode control module can also count the equivalent operation duration of the plasma generation chamber, compare the equivalent operation duration with a set threshold value, generate a reverse pulse signal when the set operation duration is reached, and send the reverse pulse signal to the plasma control module. The plasma control module controls the plasma controller to apply a reverse voltage pulse to the plasma generation chamber.

[0012] As a preferred embodiment of the present invention, the way for the purification mode control module to obtain the equivalent operation duration is as follows: The purification mode control module counts the operation duration of the plasma generation chamber and records it as the basic operation duration t. It counts the frequency of the control electric field and the motor operation speed and records them as the correction parameters F and V. It records the time points for counting the control electric field frequency and the motor operation speed as i, where i = 1, 2, 3…, n; The purification control module records the electric field frequencies obtained at different time points as Fi, and records the motor operation speeds obtained at different time points as Vi. The purification control module generates the equivalent operation duration T through formula analysis. , where △s is the time interval between two time points i, f is the preset conventional electric field frequency, and x is the preset conventional motor operation speed.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, through the structural design of gradually increasing the electric field intensity in three-level gradients along the gas flow direction, combined with the extended contact path of the S-shaped purification air duct, the reaction time and action intensity between the plasma and pollutants are effectively improved. The gradient electric field gradually ionizes and decomposes particulate matter and volatile organic compounds, improving the ionization, decomposition, and purification effects. At the same time, the S-shaped air duct design increases the turbulence intensity when the gas flows through, strengthening the gas-solid mass transfer effect and improving the purification effects of PM2.5 and bacteria.

[0014] In the present invention, through multiple groups of sensors, the operation information is collected in real time. After quantitative analysis of the operation information, the operation of the air purification generator is standardized and controlled. The operation mode of the air purification generator is reasonably selected and regulated, and at the same time, the self-cleaning effect of the plasma generation chamber is achieved, enabling the operation of the air purification generator to be automatically adjusted according to the actual air quality, improving the operation effect of the air purification generator.

[0015] In the present invention, by performing real-time pulse frequency detection on the pulse electric field and strictly controlling the pulse frequency to be within a set range, and automatically adjusting the operating frequency according to the air quality, the generation of ionizing radiation and ozone is effectively suppressed while ensuring the purification effect, thereby preventing the air purification generator from causing damage to surrounding electronic equipment and human health. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a multi-stage filtering group diagram of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the plasma action box of the present invention; Figure 4 It is a system block diagram of the present invention.

[0019] Figure 5 is a system flow chart of the present invention; In the figure: 1. Equipment casing; 2. Air inlet; 3. Plasma controller; 4. Multi-stage filtration group; 5. Plasma action box; 6. Air outlet; 7. Plasma generating chamber; 8. Purification air duct; 9. Air collecting channel; 10. Buffer exhaust channel. DETAILED DESCRIPTION

[0020] The technical scheme of the present invention will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 - Figure 5 As shown, a low-radiation plasma air purification generator includes a device housing 1. The device housing 1 and various structures inside thereof are made of anti-static materials as much as possible to reduce the dust generated by static electricity adsorbed on the device housing 1 and related components. An air inlet 2 and an air outlet 6 are respectively opened on both sides of the device housing 1. A multi-stage filter group 4 and a plasma action box 5 are installed inside the device housing 1. The multi-stage filtration group 4 is installed in the direction close to the air inlet 2. The plasma action box 5 and the multi-stage filtration group 4 are connected through the gas collection channel 9, and the plasma action box 5 and the air outlet 6 are connected through the buffer exhaust channel 10. Among them, the multi-stage filtration group can adopt materials such as HEPA filters. At the same time, the multi-stage filtration group can also be distributed on both sides of the plasma action box 5, and the material is changed to an activated carbon catalytic layer on the outlet side of the plasma action box 5; A plasma controller 3 is installed above the plasma action box 5. An S-shaped purification air duct 8 is provided inside the plasma action box 5. Two plasma generation chambers 7 are installed inside the plasma action box 5. The tops of the two plasma generation chambers 7 are connected to the plasma controller 3. Among them, the two plasma generation chambers 7 are composed of a titanium alloy honeycomb anode and a silicon nitride coating cathode. The honeycomb anode can be set to have a pore diameter of 0.5 mm and an opening rate of ≥85%. A titanium dioxide / graphene composite coating with a thickness of 50 - 80 μm can also be coated to reduce ozone generation. In the plasma controller 3, a pulse modulation circuit PMW, an AMR chip, and a high-frequency inverter circuit are configured; Plasma is generated in the plasma controller 3 and released into the purification air duct 8 through the plasma generation chamber 7. External gas enters through the air inlet 2, is filtered by the multi-stage filtration group 4, and enters the purification air duct 8 through the gas collection channel 9. The gas in the purification air duct 8 is purified by the plasma released from the plasma generation chamber 7 and then discharged through the buffer exhaust channel 10 after the flow rate is reduced through the air outlet 6.

[0022] The plasma generation chamber 7 builds a three-stage gradient electric field in the purification air duct 8, and the intensity of the three-stage gradient electric field gradually increases along the gas flow direction. For example, the electric field gradient can be set to 5 kV / cm, 8 kV / cm, and 12 kV / cm.

[0023] Example 2: Please refer to Figure 1 - Figure 5 As shown, a control system of a low-radiation plasma air purification generator includes a motor drive module, a purification mode control module, a sensor integration control module, and a plasma control module: The sensor integration control module can be connected to multiple sensors inside the air purification generator to collect the operation information collected by the sensors. The operation information collected by the sensor integration control module includes the PM2.5 concentration, ozone concentration, and pulse frequency. The PM2.5 concentration collected by the sensor acquisition control module is the PM2.5 concentration of the gas at the air inlet 2 position of the air purification generator; The ozone concentration collected by the sensor acquisition control module is the ozone concentration near the outer wall of the plasma generation chamber 7 inside the purification air duct 8; The pulse frequency collected by the sensor integrated control module is the pulse frequency output by the plasma controller 3, and the sensor integrated control module sends the statistically processed operation information to the purification mode control module; The purification mode control module conducts quantitative analysis based on the operation information. The specific process is as follows: After obtaining the operation information, the purification mode control module compares the PM2.5 concentration in the operation information with the set threshold. The set threshold can be set to 75 μg / m³. If the PM2.5 concentration is greater than or equal to the set threshold, it is determined as a high pollution concentration. If the PM2.5 concentration is less than the set threshold, it is determined as a low pollution concentration, and a high-frequency mode signal or a low-frequency mode signal is generated accordingly; After obtaining the ozone concentration, the purification mode control module compares the ozone concentration with the set ozone threshold. The ozone threshold can be set to 0.01 ppm. If the ozone concentration is greater than the ozone threshold, an ozone increase signal is generated. If the ozone concentration is less than or equal to the ozone threshold, an ozone qualified signal is generated, and an inhibition intervention mode signal or a non-intervention mode signal is generated accordingly; After obtaining the pulse frequency, the purification mode control module compares the pulse frequency with the set pulse control range. The set pulse control range can be set to a duty cycle of 0.1 - 0.3 and a pulse width of 10 - 50 μs, and it is confirmed whether the duty cycle and pulse width of the pulsed electric field are within the set pulse control range. If it is within the pulse control range, a pulse normal signal is generated. If it is not within the pulse control range, a pulse compensation signal is generated; The purification mode control module records the high-frequency mode signal, low-frequency mode signal, inhibition intervention mode signal, non-intervention mode signal, pulse normal signal, and pulse compensation signal as the control standard results, and generates corresponding operation mode signals according to the control standard results. The purification mode control module sends the operation mode signals to the motor drive module and the plasma control module; After obtaining the high-frequency mode signal or the inhibition intervention mode signal, the motor drive module increases the motor operating speed to increase the air intake of the air purification generator. After simultaneously obtaining the low-frequency mode signal and the non-intervention mode signal, the motor drive module decreases the motor operating speed to reduce the air intake of the air purification generator. The motor operating speed has a minimum value, and when it reaches the minimum value, the motor operating speed is not decreased; After increasing the motor operating speed, the motor drive module obtains the changes in PM2.5 concentration and ozone concentration through the sensor integrated control module, and conducts a weighted comparison of the changes in PM2.5 concentration and ozone concentration with the increase in motor operating speed, and adjusts the increase or decrease amount of the motor operating speed according to the comparison; The specific comparison method is as follows: Record the change amount of PM2.5 as A, record the change amount of ozone concentration as B, record the adjustment amount of the motor driving module to the running speed of the motor as C, assign a weight a to the change amount of PM2.5, assign a weight b to the change amount of ozone concentration, assign a weight c to the adjustment amount of the running speed of the motor, and compare the proportional relationship between a×A, b×B, and c×C to confirm the adjustment effect of the motor running speed on PM2.5 and ozone concentration. Then, according to whether the change amount A of PM2.5 and the change amount B of ozone concentration reach the preset standard, combined with the adjustment effect, perform secondary adjustment on the running speed of the motor.

[0024] After the plasma control module obtains the high-frequency mode signal, it controls the electric field frequency to switch to high frequency, and the high frequency can be set to 3 kHz. After the plasma control module obtains the low-frequency mode signal, it controls the electric field frequency to switch to low frequency, and the low frequency can be set to 1 kHz; After the plasma control module obtains the suppression intervention mode signal, it adjusts the duty cycle of the electric field pulse to increase the duty cycle of the electric field pulse. After the plasma control module obtains the non-intervention mode signal, it does not respond; After the plasma control module obtains the pulse compensation signal, it quantitatively adjusts the pulse frequency of the pulsed electric field. After the quantitative adjustment, it confirms whether the pulse compensation signal disappears. If the pulse compensation signal disappears, the adjustment ends. If the pulse compensation signal does not disappear, an abnormal warning is issued.

[0025] The purification mode control module counts the running duration of the plasma generation chamber 7, records it as the basic running duration t, counts the frequency of the control electric field and the running speed of the motor, records them as the correction parameters F and V, and records the time points for counting the control electric field frequency and the running speed of the motor as i, where i = 1, 2, 3…, n; The purification control module records the electric field frequencies obtained at different time points as Fi, records the running speeds of the motor obtained at different time points as Vi, and the purification control module generates the equivalent running duration T through formula analysis. , where △s is the time interval between two time points i, f is the preset conventional electric field frequency, x is the preset conventional motor running speed, and in the formula, is the result of the micro-integration of the electric field frequency running over a long time, is the result of the micro-integration of the motor running speed running over a long time, and and are the continuous running results of the conventional electric field frequency and the motor running speed. By the ratio of the two, the workload gap between the actual operation and the conventional operation in the laboratory can be obtained, and then the basic running time can be parametrically adjusted to improve the accuracy during reverse pulse cleaning; Among them, f and x are determined through experiments according to the specific specifications of the device, that is, in the laboratory, f and x are used as parameters to control the device to operate with fixed parameters. The time when there is obvious dust blockage in the device and reverse pulse cleaning is required is recorded as the set threshold. The purification control module compares the equivalent operation duration with the set threshold. In actual situations, the set threshold can be set to 2 hours. When the set operation duration is reached, a reverse pulse signal is generated and sent to the plasma control module. The plasma control module controls the plasma controller 3 to apply a reverse voltage pulse of 5 kV to the plasma generation chamber 7.

[0026] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A low-radiation plasma air purification generator, comprising a device housing (1), characterized in that: An air inlet (2) and an air outlet (6) are respectively provided on both sides of the device housing (1), and a multi-stage filter group (4) and a plasma action box (5) are installed inside the device housing (1); The multi-stage filter group (4) is installed in a direction close to the air inlet (2), the plasma action box (5) and the multi-stage filter group (4) are connected via an air collection channel (9), and the plasma action box (5) and the air outlet (6) are connected via a buffer exhaust channel (10); A plasma controller (3) is installed above the plasma action box (5), a purification air duct (8) is provided inside the plasma action box (5), and the purification air duct (8) is S-shaped. Two groups of plasma generating chambers (7) are installed inside the plasma action box (5), and the top ends of the two groups of plasma generating chambers (7) are connected to the plasma controller (3); Plasma is generated in the plasma controller (3), and the plasma is released into the purification air duct (8) through the plasma generation chamber (7); external gas enters through the air inlet (2), is filtered by the multi-stage filter group (4), and enters the purification air duct (8) through the air collection channel (9); the gas in the purification air duct (8) is purified by the plasma released by the plasma generation chamber (7), and is discharged through the air outlet (6) after the flow rate is reduced through the buffer exhaust channel (10); Also included is a control system for a low-radiation plasma air purification generator, including a motor drive module, a purification mode control module, a sensor integrated control module and a plasma control module; The sensor integrated control module can be connected to multiple sensors in the air purification generator, collect the operation information collected by the sensors, and send the operation information to the purification mode control module; The purification mode control module performs quantitative analysis according to the operation information to obtain a control standard result, and generates a corresponding operation mode signal according to the control standard result, and the purification mode control module sends the operation mode signal to the motor drive module and the plasma control module; The motor driving module and the plasma control module perform operation control according to the received operation mode signal.

2. A low-radiation plasma air purification generator according to claim 1, characterized in that: The plasma generation chamber (7) constructs a three-level gradient electric field in the purification air duct (8), wherein the intensity of the three-level gradient electric field gradually increases along the gas flow direction.

3. A low-radiation plasma air purification generator according to claim 1, characterized in that: The operating information collected by the sensor integrated control module includes PM2.5 concentration, ozone concentration and pulse frequency. The PM2.5 concentration collected by the sensor collection control module is the PM2.5 concentration of the gas at the air inlet (2) of the air purification generator; The ozone concentration collected by the sensor collection control module is the ozone concentration inside the purification air duct (8) close to the outer wall of the plasma generation chamber (7); The pulse frequency collected by the sensor integrated control module is the pulse frequency output by the plasma controller (3).

4. A low-radiation plasma air purification generator according to claim 1, characterized in that: After obtaining the operation information, the purification mode control module compares the PM2.5 concentration in the operation information with the set threshold, obtains the high pollution concentration and the low pollution concentration according to the comparison result, and generates a high frequency mode signal or a low frequency mode signal accordingly; After obtaining the ozone concentration, the purification mode control module compares the ozone concentration with the set ozone threshold, generates an ozone increase signal or an ozone qualified signal according to the comparison result, and generates a suppression intervention mode signal or a non-intervention mode signal accordingly; After obtaining the pulse frequency, the purification mode control module compares the pulse frequency with the set pulse control range to confirm whether the duty cycle and pulse width of the pulse electric field are within the set pulse control range. If they are within the pulse control range, a pulse normal signal is generated; if not, a pulse compensation signal is generated.

5. A low-radiation plasma air purification generator according to claim 4, characterized in that: After obtaining the high-frequency mode signal or suppressing the intervention mode signal, the motor driving module increases the motor running speed to increase the air intake of the air purification generator. After simultaneously obtaining the low-frequency mode signal and the non-intervention mode signal, the motor driving module reduces the motor running speed to reduce the air intake of the air purification generator. The motor running speed has a minimum value. When the minimum value is reached, the motor running speed is not reduced. After increasing the motor running speed, the motor drive module obtains the PM2.5 concentration change and the ozone concentration change through the sensor integrated control module, and makes a weighted comparison between the PM2.5 concentration change and the ozone concentration change and the increase in the motor running speed, and adjusts the increase or decrease in the motor running speed according to the comparison.

6. A low-radiation plasma air purification generator according to claim 4, characterized in that: After obtaining the high-frequency mode signal, the plasma control module controls the electric field frequency to switch to high frequency, and after obtaining the low-frequency mode signal, the plasma control module controls the electric field frequency to switch to low frequency; After obtaining the suppression intervention mode signal, the plasma control module adjusts the duty cycle of the electric field pulse to increase the duty cycle of the electric field pulse. After obtaining the non-intervention mode signal, the plasma control module does not respond. After acquiring the pulse compensation signal, the plasma control module quantitatively adjusts the pulse frequency of the pulse electric field, and after the quantitative adjustment, confirms whether the pulse compensation signal disappears. If the pulse compensation signal disappears, the adjustment is terminated; if the pulse compensation signal does not disappear, an abnormal warning is issued.

7. A low-radiation plasma air purification generator according to claim 1, characterized in that: The purification mode control module can also collect statistics on the equivalent operating time of the plasma generating chamber (7), and compare the equivalent operating time with a set threshold value. When the set operating time is reached, a reverse pulse signal is generated, and the reverse pulse signal is sent to the plasma control module. The plasma control module controls the plasma controller (3) to apply a reverse voltage pulse to the plasma generating chamber (7).

8. A low-radiation plasma air purification generator according to claim 7, characterized in that: The purification mode control module obtains the equivalent running time in the following manner: The purification mode control module counts the operation time of the plasma generation chamber (7) and records it as the basic operation time t, counts the frequency of the control electric field and the motor operation speed and records them as correction parameters F and V, and records the time point of the statistical control electric field frequency and the motor operation speed as i, i=1, 2, 3..., n; The purification control module records the electric field frequency obtained at different time points as Fi, and records the motor running speed obtained at different time points as Vi. The purification control module generates an equivalent running time T through formula analysis. , where △s is the time interval between two time points i, f is the preset conventional electric field frequency, and x is the preset conventional motor operating speed.

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