TWI667047B - Device with the function of automatic adjusting ozone emission and operation method thereof - Google Patents

Abstract

A device capable of automatically adjusting ozone emission concentration and an operation method thereof. The device includes an ozone sensor, a photo-generated ozone module, a air supply module, and a control circuit. The ozone sensor senses the concentration of ozone in the air. The photo-ozone module generates ozone in the wind flow path of the device by photolysis reaction. The air supply module creates a wind flow in the wind flow path. The control circuit controls the photo-generated ozone module according to the ozone concentration to adjust the ozone yield, or controls the air supply module according to the ozone concentration to adjust the air volume of the wind flow, or according to the ozone concentration Correspondingly controlling the photo-generated ozone module and the air supply module to adjust the ozone yield and the air volume.

Description

Device capable of automatically adjusting ozone emission concentration and operation method thereof

The present invention relates to an ozone device, and more particularly to an apparatus for automatically adjusting an ozone emission concentration and a method of operating the same.

The methods for generating ozone can be broadly classified into three types: high pressure discharge, ultraviolet photolysis, and electrolysis. Because electrolysis requires the use of liquids, there are more restrictions on the application of environmental purification. The high-pressure discharge method is the mainstream technology used in the ozone machine. However, if air is used as the raw material, or the purity of oxygen is not high, nitrogen oxides will be generated during high-voltage discharge. These nitrogen oxides not only do not contribute to air purification, but also air pollutants that affect human health. Ultraviolet photolysis uses ultraviolet light with a wavelength below 200 nm to illuminate the air, because such short-wavelength ultraviolet light has a high energy, which can dissociate oxygen and water in the air to form ozone and other active substances. (active agents, hereinafter referred to as purification factors); but the energy of this band is not enough to dissociate nitrogen, so it does not produce nitrogen oxides. In the application of environmental purification, the method of ultraviolet photolysis is relatively advantageous.

Short-wavelength (under 200 nm) UV energy can ionize water and oxygen in the air, which produces ozone (O ₃ ), negative oxygen ions (O ₂ ^- ), hydroxyl radicals (OH ^‧ ) and hydrogen peroxide. An oxidation-active purification factor such as (H ₂ O ₂ ). These produced purification factors can react with pollutants in the air (such as formaldehyde, toluene, ammonia...) or surface pollutants (such as bacteria, mold, three-handed smoke...) to remove contaminants and achieve purification efficiency.

There are many ways to generate ultraviolet light with a wavelength below 200 nm, which can be hot cathode lamps, cold cathode lamps, excimer lamps, light-emitting diodes or other ultraviolet light sources. Lamps of such wavelengths must be of high purity. Quartz tube to avoid the absorption of ultraviolet light or deterioration of the glass, which affects the transmittance of ultraviolet light.

Regardless of the way in which ozone is produced, in the application of environmental purification, it is necessary to face the problem of indoor ozone concentration control. Especially when people are indoors, the ozone concentration must be lower than the requirements of the regulations. However, most of the ozone purification devices in the workshop do not have such design and control mechanisms. High concentrations of ozone may pose a potential threat to the health of users.

In order to solve the problem of excessive ozone concentration, various solutions have been proposed in many patent documents, such as Chinese Patent Publication No. CN107543284A, CN107051150A, CN107015578A, and the like. Although these existing patents use ozone sensors to measure the ozone concentration and serve as the basis for controlling the ozone generating device, the control methods are only used to turn on or off. Such control methods are likely to cause drastic changes in ozone concentration. Not only is it impossible to effectively control the ozone concentration, but it is also likely to detract from the life of the equipment due to frequent switching.

Although some patents also set up an ozone sensor, it is installed at the air outlet, focusing on controlling the ozone concentration of the air outlet, such as Chinese Patent Publication No. CN205386402U. However, even if the ozone concentration of the air outlet reaches the standard, if the space used is too small, the indoor ozone concentration may be too high, which does not mean that the indoor ozone concentration is within a safe and effective range.

The present invention provides an apparatus for automatically adjusting an ozone emission concentration and an operation method thereof, which can maintain an ozone concentration in the air in an effective and safe range.

An embodiment of the present invention provides an apparatus for automatically adjusting an ozone emission concentration. The device includes an ozone sensor, a photo-generated ozone module, a air supply module, and a control circuit. An ozone sensor is used to sense the concentration of ozone in the air. The photo-ozone module generates ozone in the wind flow path of the device by ultraviolet photolysis. A blower module is used to create a wind flow in the wind flow path. The control circuit is coupled to the ozone sensor, the photo-ozone module, and the air supply module. The control circuit is configured to control the photo-generated ozone module according to the ozone concentration to adjust the ozone yield, or control the air supply module according to the ozone concentration to adjust the airflow of the wind flow, or according to the The ozone concentration corresponds to controlling the photo-generated ozone module and the air supply module to adjust the ozone yield and the air volume.

An embodiment of the present invention provides an operation method of an apparatus that can automatically adjust an ozone emission concentration. The operating method includes: sensing an ozone concentration in the air by an ozone sensor; generating ozone in a wind flow path of the device by ultraviolet photolysis of the photo-generated ozone module; and the air flow is performed by the air supply module And generating a wind flow in the path; and controlling, by the control circuit, the photo-generated ozone module according to the ozone concentration to adjust the ozone yield, or controlling the air supply module according to the ozone concentration to adjust the air flow of the wind flow, Or controlling the photo-generated ozone module and the air supply module according to the ozone concentration to adjust the ozone yield and the air volume.

Based on the above, the apparatus for automatically adjusting the ozone emission concentration and the method of operating the same according to the embodiments of the present invention, which utilize an ozone sensor to sense the concentration of ozone in the air. Based on the sensed ozone concentration, the control circuit can control one or more of the photo-ozone module and the air supply module to maintain the ozone concentration in the air within an effective and safe range.

The above described features and advantages of the invention will be apparent from the following description.

The term "coupled (or connected)" as used throughout the specification (including the scope of the claims) may be used in any direct or indirect connection. For example, if the first device is described as being coupled (or connected) to the second device, it should be construed that the first device can be directly connected to the second device, or the first device can be A connection means is indirectly connected to the second device. In addition, wherever possible, the elements and/ Elements/components/steps that use the same reference numbers or use the same terms in different embodiments may refer to the related description.

The following examples will illustrate an apparatus for automatically adjusting the ozone emission concentration. By sensing the concentration of ozone in the air, the device can correspondingly control one or more of the photo-ozone module and the air supply module to maintain the ozone concentration in the air within an effective and safe range. The following examples will use photolysis as an application example of a photo-generated ozone module, and assume that the light generated by the photo-generated ozone module is ultraviolet light.

The photo-generated ozone module generates ozone by means of ultraviolet photolysis, which can avoid the side effects of nitrogen oxides generated by high-voltage discharge. The photolysis reaction produced by the photo-generated ozone module is in a high-humidity environment, because the water vapor is easily dissociated by the ultraviolet light into a purification factor, so that the purification efficiency can be improved. Other adsorption purifiers quickly reduce efficiency due to moisture occupying the adsorbed pores. The conventional ozone device cannot adjust the output power in time according to the change of the indoor ozone concentration, or adjust the ozone emission concentration only by the on/off method, that is, the ozone yield is limited or the ozone concentration is likely to fluctuate greatly. If the indoor space is too small or too large, the indoor ozone concentration is likely to be too high or too low. Current regulations and national standards have strict regulations on the indoor ozone concentration and the outlet ozone concentration of the purification unit. In Taiwan, for example, the indoor ozone concentration is lower than 0.06 ppm, while the indoor ozone concentration requirement in mainland China must be less than 0.16 mg/m ³ (GB/T 18883-2002, about 0.08 ppm). In addition, the ozone concentration at the outlet of the purification unit must be less than 0.10 mg/m ³ (GB 21551.3-2010, approximately 0.05 ppm). If the purification device cannot effectively control the ozone concentration accumulated in the indoor environment and the ozone concentration at the outlet of the device, it cannot be sold in the market.

FIG. 1 is a schematic diagram of a circuit block of an apparatus 100 for automatically adjusting an ozone emission concentration according to an embodiment of the invention. Depending on the design requirements, device 100 can be an environmental purifier, an air cleaner, an air conditioner, a new fan, or other product that purifies the air. The apparatus 100 for automatically adjusting the ozone emission concentration includes a photo-generated ozone module 110, a control circuit 120, an ozone sensor 130, and a blower module 140. The control circuit 120 is coupled to the photo-ozone module 110, the ozone sensor 130, and the air supply module 140.

For example, but not limited to, the control circuit 120 can be a controller, a microcontroller, a microprocessor, an application-specific integrated circuit (ASIC), or a digital signal processor. DSP), Field Programmable Gate Array (FPGA) and/or various logic blocks, modules, and circuits in other processing units. In some embodiments, control circuit 120 can be a control module that includes a microprocessor. The ozone sensor 130 can be coupled to the analog signal input port of the control circuit 120 to provide an ozone sensing signal. The air supply module 140 can be coupled to the air volume control signal output port of the control circuit 120 to receive the air volume control signal. The photo-ozone module 110 can be coupled to the power control signal output port of the control circuit 120 to receive the power control signal.

2 is a flow chart showing an operation method of an apparatus for automatically adjusting an ozone emission concentration according to an embodiment of the invention. Please refer to FIG. 1 and FIG. 2 . In step S210, the air supply module 140 can create a wind flow in the airflow path of the device 100, and the photo-ozone module 110 can generate ozone in a manner of ultraviolet light photolysis in the air flow path of the device 100. This embodiment does not limit the implementation of the photo-generated ozone module 110. For example, the photo-generated ozone module 110 may be an ultraviolet light source (for example, an ultraviolet hot cathode lamp, a cold cathode lamp, an excimer lamp, a light-emitting diode, or another ultraviolet light source capable of photolysis). Photogenic ozone module. This embodiment does not limit the implementation of the air supply module 140. For example, the air supply module 140 can include a conventional fan and circuit module or other electromechanical device that can create a wind flow.

In step S220, the ozone sensor 130 may sense the concentration of ozone in the air (this is the concentration of ozone accumulated in the environment). This embodiment does not limit the implementation of the ozone sensor 130. For example, ozone sensor 130 can be a conventional sensor or other sensor that can sense ozone. The device 100 of the present embodiment can be combined with various types of ozone sensors, such as a semiconductor ozone sensor, an electrochemical ozone sensor, an ultraviolet light absorption ozone sensor, or other reproducible sensors. The concentration signal measured by the ozone sensor 130 can be transmitted to the control circuit 120 by wire (or wireless). In accordance with design requirements, in some embodiments, the ozone sensor 130 can be configured in an air intake section of the wind flow path within the apparatus 100. For example, the ozone sensor 130 can be disposed adjacent the air inlet of the device 100 to sense the concentration of ozone in the air in the field in which the device 100 is located. In other embodiments, the ozone sensor 130 can be configured external to the device 100 to sense the concentration of ozone in the air in the field (eg, the room) in which the device 100 is located. For example, both ozone sensor 130 and device 100 are disposed in the same field, but the location of ozone sensor 130 can be different than the location of device 100.

In step S230, the control circuit 120 can correspondingly control the photo-ozone module 110 according to the ozone concentration to adjust the ozone yield. For example, after the control circuit 120 determines, the control circuit 120 can adjust the output power of the ultraviolet light source in the photo-generated ozone module 110 to change the amount of ozone released by the photo-generated ozone module 110. When the concentration of ozone in the air is too low, the control circuit 120 can increase the output power of the ultraviolet light source to increase the ozone yield. When the concentration of ozone in the air is too high, the control circuit 120 can reduce the output power of the ultraviolet light source to reduce the ozone yield. Thus, device 100 ensures that the concentration of ozone in the air is within safe limits and maintains optimal and safe environmental purification performance.

FIG. 3 is a schematic flow chart of an operation method of an apparatus for automatically adjusting an ozone emission concentration according to another embodiment of the present invention. Steps S210 and S220 shown in FIG. 3 can refer to the related descriptions of step S210 and step S220 shown in FIG. 2, and therefore will not be described again. Please refer to FIG. 1 and FIG. 3. In step S330, the control circuit 120 can correspondingly control the air supply module 140 according to the ozone concentration in the air to adjust the air volume of the wind flow. For example, after the control circuit 120 determines, the control circuit 120 can adjust the rotational speed of the blade in the air supply module 140 to change the ozone concentration in the wind flow path. When the ozone concentration is too low, the control circuit 120 can reduce the rotational speed of the blade to increase the concentration of ozone in the wind flow path. When the ozone concentration is too high, the control circuit 120 can increase the rotational speed of the blade to reduce the concentration of ozone in the wind flow path. Thus, the device 100 ensures that the emitted ozone concentration is within safe limits and maintains an optimal and safe environmental purification performance.

4 is a flow chart showing an operation method of an apparatus for automatically adjusting an ozone emission concentration according to still another embodiment of the present invention. Steps S210 and S220 shown in FIG. 4 can refer to the related descriptions of step S210 and step S220 shown in FIG. 2, and therefore will not be described again. Please refer to FIG. 1 and FIG. 4. In step S430, the control circuit 120 can correspondingly control the photo-ozone module 110 and the air supply module 140 according to the ozone concentration in the air to adjust the ozone yield and the air volume of the wind flow. Thus, device 100 ensures that the concentration of ozone in the air is within safe limits and maintains optimal and safe environmental purification performance.

The device 100 described in the above embodiments uses the ozone sensor 130 to measure the concentration of ozone in the wind or the environment, and immediately transmits the concentration signal to the controller in a wired or wireless manner. The processing unit built in the controller can be based on the concentration. High and low, timely adjustment of the output power of adjustable light source drivers (such as adjustable ballast) (such as adjusting voltage, current and / or frequency) to change the output power of the ultraviolet light source in the photo-generated ozone module, avoiding the accumulation of ozone concentration in the environment Excessive problems or low concentrations cause poor efficiency.

FIG. 5 is a schematic diagram showing the arrangement positions of the photo-generated ozone module 110, the ozone sensor 130, and the air supply module 140 of FIG. 1 according to an embodiment of the invention. In the embodiment shown in FIG. 5, the ozone sensor 130 is disposed in the incoming section of the wind flow path within the apparatus 100. For example, the ozone sensor 130 can be disposed near the air inlet of the device 100. The ozone sensor 130 can sense the concentration of ozone in the air of the wind flow path. The concentration signal measured by the ozone sensor 130 can be transmitted to the control circuit 120 by wire (or wireless). When the device 100 is applied to a place having a higher concentration of suspended particles, or is applied to a place having a higher concentration of other volatile organic pollutants, the device 100 can adopt a high-efficiency filter according to design requirements (High-Efficiency). A Particulate Air filter (ie, a HEPA filter) and/or an activated carbon filter is disposed at the air inlet of the device 100. Where the device 100 is configured with a screen, the ozone sensor 130 can be located behind the HEPA filter.

The photo-ozone module 110 is disposed in the middle of the wind flow path within the device 100. The photo-generated ozone module 110 can generate ozone in the wind flow path of the device 100 in accordance with the ozone yield control of the control circuit 120. The air supply module 140 is disposed in an air outlet section of the air flow path in the device 100. In accordance with the air volume control of the control circuit 120, the air supply module 140 can create a wind flow in the wind flow path of the device 100. In this embodiment, the ozone sensor 130 and the photo-generated ozone module 110 are both installed before the air supply module 140.

FIG. 6 is a schematic diagram showing the arrangement positions of the photo-generated ozone module 110, the ozone sensor 130, and the air supply module 140 of FIG. 1 according to another embodiment of the present invention. In the embodiment shown in FIG. 6, ozone sensor 130 is disposed adjacent the air inlet of the wind flow path within device 100 to sense the ozone concentration of the air in the wind flow path. The concentration signal measured by the ozone sensor 130 can be transmitted to the control circuit 120 by wire (or wireless). Where the device 100 is configured with a screen, the ozone sensor 130 can be located behind the screen. The air supply module 140 is disposed in the middle of the air flow path within the device 100. In accordance with the air volume control of the control circuit 120, the air supply module 140 can create a wind flow in the wind flow path of the device 100. The photo-ozone module 110 is disposed in an air outlet section of the airflow path within the apparatus 100. The photo-generated ozone module 110 can generate ozone in the wind flow path of the device 100 in accordance with the ozone yield control of the control circuit 120. In this embodiment, the photo-generated ozone module 110 is installed behind the air supply module 140. Therefore, the purification factor (for example, ozone) generated by the photo-ozone module 110 can be directly discharged without passing through the air supply module 140. Therefore, the purification factor entering the environment can maintain a higher concentration.

FIG. 7 is a schematic diagram showing the arrangement positions of the photo-generated ozone module 110, the ozone sensor 130, and the air supply module 140 of FIG. 1 according to still another embodiment of the present invention. In the embodiment shown in FIG. 7, ozone sensor 130 is disposed external to device 100. For example, both ozone sensor 130 and device 100 are disposed in the same field (eg, a room), but the location of ozone sensor 130 may be different than the location of device 100. In another application scenario, ozone sensor 130 can be attached to the outer surface of device 100. The ozone sensor 130 can sense the concentration of ozone in the air of the room. The ozone sensor 130 can transmit the ozone concentration related detection result back to the control circuit 120 via a wireless communication channel (or a wire channel). The air supply module 140 is disposed in the middle of the air flow path within the device 100. In accordance with the air volume control of the control circuit 120, the air supply module 140 can create a wind flow in the wind flow path of the device 100. The photo-ozone module 110 is disposed in an air outlet section of the airflow path within the apparatus 100. The photo-generated ozone module 110 can generate ozone in the wind flow path of the device 100 in accordance with the ozone yield control of the control circuit 120.

FIG. 8 is a block diagram showing the circuit of the photo-generated ozone module 110 of FIG. 1 when the hot cathode lamp 112 is used as an ultraviolet light source according to an embodiment of the invention. The power source 10 shown in FIG. 8 can be powered to the photo-ozone module 110. Power source 10 can be any power circuit/component. For example, power source 10 can be a conventional power supply circuit or other power supply circuit/component. By way of further example, power source 10 can be a power adapter that provides a small DC voltage (less than 50 volts), a mains rectifier, a vehicle DC power supply, or other DC power circuit.

In the embodiment shown in FIG. 8, the photo-generated ozone module 110 includes an adjustable light source driver 111 (eg, an adjustable ballast) and a hot cathode lamp tube 112 (ultraviolet light source). The power source 10 can be powered to the adjustable light source driver 111. The adjustable light source driver 111 is coupled to the hot cathode lamp tube 112. The adjustable light source driver 111 can provide electrical energy EE to drive the hot cathode fluorescent tube 112 to generate light energy EL.

The hot cathode lamp tube 112 is disposed in a wind flow path within the device 100. The hot cathode lamp 112 can generate light energy EL to generate ozone in the wind flow path. According to design requirements, the hot cathode lamp 112 may include an ultraviolet lamp or other type of lamp. In addition to being used for sterilization, the short-wavelength ultraviolet light source can also be used for the improvement of indoor environmental quality. According to design requirements, in some applications, the wavelength of light radiated by the ultraviolet light source is mainly concentrated in the UVC range (wavelength is 100-280 nm). When the output power can be changed according to operating conditions or application scenarios, the scope of use can be expanded, and the operating cost can be effectively reduced.

When the wavelength of light radiated by the ultraviolet light source is less than 200 nm, it not only has the effect of sterilization, but also drives the photolysis reaction. Photolysis reactions can be divided into two parts: direct photolysis and indirect photolysis. The direct photolysis reaction directly destroys the molecular bonds of contaminants by the energy of ultraviolet light of a short wavelength (wavelength less than 200 nm). The indirect photolysis reaction is to ionize the water vapor and oxygen in the air through the energy of the short-wavelength ultraviolet light to generate redox capable of reducing pollutants such as ozone, hydrogen peroxide, hydroxyl radicals, superoxide ions, and the like. The purification factor is then reacted by such purification factors and pollutants to purify the air and surface pollutants.

The direct photolysis reaction is driven by ultraviolet light having a wavelength of less than 200 nm. According to the relationship between the Planck-Einstein equation (Formula (1)) and the wavelength and frequency of light (Equation (2)), the formula (3) can be obtained. In equations (1), (2), and (3), E is the energy of light ( eV or k J/mol ), and h is the Planck constant. For the frequency of light ( s ^-1 ), C is the speed of light, It is the wavelength of light (nm). The Planck constant is 4.1357 * 10 ^-15 ( eV × s ) or 6.63 * 10 ^-34 ( J × s ), where 1 eV = 1.6 * 10 ^-19 J . The speed of light is 3 x 10 ⁸ m/s . The ultraviolet light of 185 nm wavelength calculated from equation (3) has an energy of 6.7 eV (equivalent to 646 k J / mol ).

………………………….…………………. Formula 1)

.................................................... (2)

............................................ Equation (3)

When the bond energy between molecules is less than the energy emitted by ultraviolet light (646 k J / mol ), the molecular bond may be destroyed and disintegrated. Conversely, when the molecular bond energy is greater than the energy of the ultraviolet light, the molecular bond is not easily destroyed. Accordingly, it is inferred that the molecular bonds of Table 1 below may be destroyed by photolysis. Table 1 covers most of the indoor pollutants or odors.

Table 1: Molecular and Bond Energy   Molecular bond energy (kJ/mol) Molecular bond energy (kJ/mol) HO 459 CS 272 HC 411 C=S 573 HH 432 OO 142 HN 386 O=O 494 HS 363 OF 190 CC 346 O=S 522 C= C 602 S=S 425 CO 358 SS 226 CF 485 NO 201 C-Cl 327 N=O 607

Nitrogen in the air has a bond energy of up to 940 kJ/mol due to N≡N, and ultraviolet light at this wavelength (185 nm) is insufficient to decompose nitrogen to produce nitrogen oxides. Nitrogen oxides are generally produced at high temperatures (combustion) or high electric fields (such as corona discharge from ozone generators).

The indirect photolysis reaction is also driven by ultraviolet light having a wavelength of less than 200 nm. Referring to the reaction formulas of the following formulas (4) to (10), the powerful energy of ultraviolet light can ionize oxygen and water in the air to generate ozone, hydronium ions, hydroxyl radicals, peroxidation. Purification factors such as hydrogen and superoxide ions (or negative oxygen ions, O ₂ ^- ). These purification factors have strong oxidation/reduction ability, especially hydroxyl radicals, and their strong oxidizing power will quickly react with pollutants in the air. Since the life of such a purification factor is less than 1 ms, it is equivalent to a reaction in the reaction chamber that is exhausted or reduced to water, so the chance of causing harm to the human body is extremely low.

............ Equation (4)

.............................. (5)

........................................... (6)

............................................. (7)

................................................... (8)

.................................................... (9)

........................................ (10)

The above-mentioned purification factor can play a good sterilization and deodorizing effect on the odor in the environment and the bacteria, viruses, molds and three-handed smoke adhering to the surface, so as to achieve the purpose of environmental purification. In theory, the higher the concentration of the purification factor, the better the sterilization and deodorization effect. However, in practical applications, the safety of people living in the environment must be considered. Too high a concentration of purification factors may cause health risks. The amount of these purification factors is closely related to the output power of the photo-ozone module. By regulating the output power of the photo-ozone module, the amount of purification factor can be regulated.

The adjustable light source driver 111 can adjust the output power of the hot cathode lamp 112 so that the ozone concentration of the outlet can be controlled within a safe range. Ozone with a concentration within a safe range not only has the environmental purification effect of sterilization and deodorization, but also does not endanger human health. Since the hot cathode lamp 112 is characterized by a negative resistance, its starting current (voltage) is much different from the operating current (voltage). When the operating power is to be adjusted, the operating current and frequency of the hot cathode lamp 112 need to be adjusted within an allowable range. The adjustable light source driver 111 of the present embodiment uses a programmable controller (such as a microprocessor, etc.) and a built-in pulse width modulation function to detect the characteristics of the hot cathode lamp 112 and adjust the hot cathode lamp accordingly. The operating current and frequency of the tube 112. Therefore, the adjustable light source driver 111 shown in this embodiment can illuminate the lamp tube and adjust the output power within a certain control range.

Referring to FIG. 8, when the hot cathode lamp 112 is activated, the adjustable light source driver 111 first raises the tube voltage to turn on the electrodes at both ends of the hot cathode tube 112, thereby exciting the gas discharge to generate light energy (for example, ultraviolet light) EL. . When the hot cathode lamp 112 is turned on, the adjustable light source driver 111 is stepped down to avoid burning the lamp, and the adjustable light source driver 111 drives the hot cathode lamp 112 in a high frequency resonance manner to maintain stable light energy EL.

The control circuit 120 is coupled to the adjustable light source driver 111. The control circuit 120 can obtain feedback information related to the light energy EL from the hot cathode lamp 112. The control circuit 120 controls the adjustable light source driver 111 according to the feedback information to adjust the frequency and current of the electric energy EE output by the adjustable light source driver 111. That is, the control circuit 120 can dynamically adjust the frequency and current of the driving electric energy EE of the hot cathode lamp tube 112 in response to the light energy EL of the hot cathode lamp tube 112. Therefore, the adjustable light source driver 111 can feedback the output power of the hot cathode lamp 112.

The adjustable light source driver 111 shown in FIG. 8 includes a resonance circuit 111a and an inverter circuit 111b. This embodiment does not limit the embodiment of the resonant circuit 111a. For example, the resonant circuit 111a can be a conventional resonant circuit or other resonant circuit/component. In some embodiments, the resonant circuit 111a can be a Series resonant series-parallel load (SRSPL) circuit. The inverter circuit 111b is coupled to the resonance circuit 111a. The inverter circuit 111b can provide electrical energy EE to drive the hot cathode lamp tube 112. For example, the inverter circuit 111b is responsible for boosting the voltage to provide an operating voltage to the hot cathode lamp tube 112.

The feedback circuit 121 is responsible for detecting and returning the power consumption of the load (the hot cathode lamp 112) to the control circuit 120. In detail, the feedback circuit 121 is coupled to the hot cathode lamp 112 to obtain feedback information FB related to the light energy EL. For example, the feedback information FB can include the current power consumption of the load (hot cathode lamp 112). The feedback circuit 121 outputs the feedback information FB to the control circuit 120. In the embodiment shown in FIG. 8, the ozone sensor 130 provides an ozone sensing signal to the control circuit 120.

The control circuit 120 calculates the current value and the frequency value required for the target power according to the feedback information FB and the ozone sensing signal, and controls the resonant circuit 111a and/or the inverter circuit 111b of the adjustable light source driver 111 according to the operation result. Adjust the frequency and current of the electrical energy EE. For example, the control circuit 120 adjusts one or more of the at least one inductance value and the at least one capacitance value inside the resonant circuit 111a according to the feedback information FB and the ozone sensing signal to adjust the frequency and current of the electrical energy EE. In other embodiments, the control circuit 120 adjusts the air volume of the air supply module 140 according to the feedback information FB and the ozone sensing signal. In other embodiments, the control circuit 120 adjusts the air volume of the air supply module 140 according to the feedback information FB and the ozone sensing signal, and simultaneously controls the resonant circuit 111a to adjust the frequency and current of the electrical energy EE.

In other words, the control circuit 120 instantly knows the current power consumption of the hot cathode lamp 112 in a dynamic sensing manner. The control circuit 120 can dynamically adjust the frequency and current of the drive power EE of the hot cathode lamp 112 in response to the current power consumption (or light energy EL) of the hot cathode lamp 112. Therefore, the control circuit 120 and the photo-generated ozone module 110 can feedback the output power of the hot cathode lamp 112.

In some embodiments, the control circuit 120 can also receive a power adjustment command (ozone concentration adjustment command) from a user interface circuit (not shown). Control circuit 120 can dynamically adjust the frequency and current of drive power EE of hot cathode lamp 112 in response to the power adjustment command to adjust the output power of hot cathode lamp 112. For example, when receiving the power adjustment command, the control circuit 120 can calculate the frequency of the required adjustment power, and then adjust the frequency of the resonance circuit 111a and/or the output current of the inverter circuit 111b to change the hot cathode lamp. The output power of the tube 112. The control circuit 120 can also control the adjustable light source driver 111 according to the ozone sensing signal (ozone concentration) of the ozone sensor 130 to dynamically adjust the frequency and current of the driving power EE of the hot cathode lamp 112, thereby adjusting the hot cathode lamp. The output power of the tube 112. For example, the control circuit 120 can also control the frequency of the resonant circuit 111a and/or the output current of the inverter circuit 111b according to the ozone sensing signal of the ozone sensor 130, thereby adjusting the output power of the hot cathode lamp 112. .

In some embodiments, the control circuit 120 can also control the rotational speed of the air supply module 140 according to the air volume command of the user interface circuit (not shown). The control circuit 120 can also correspondingly control the adjustable light source driver 111 according to the rotational speed of the air supply module 140 to adjust the output power (eg, frequency and current) of the electrical energy EE. When the rotational speed of the air supply module 140 increases (ie, the air volume increases), the control circuit 120 can adjust the output power (eg, frequency and current) of the electrical energy EE to increase the output power of the hot cathode fluorescent tube 112. When the rotational speed of the air supply module 140 is reduced (ie, the air volume is reduced), the control circuit 120 can adjust the output power (eg, frequency and current) of the electrical energy EE to reduce the output power of the hot cathode fluorescent tube 112. Therefore, in some application examples, the control circuit 120 can instantly adjust the ozone yield of the ultraviolet lamp (ultraviolet light source 112), maintain the ozone concentration of the device outlet in an effective and safe range, and do not cause the ozone of the air outlet due to the change of the air volume. The concentration is too high or too low.

In summary, the apparatus 100 for automatically adjusting the ozone emission concentration and the method of operating the same according to the embodiments of the present invention utilize the ozone sensor 130 to sense the ozone concentration in the air. Based on the sensed ozone concentration, the control circuit 120 can control one or more of the photo-ozone module 110 and the air supply module 140 to maintain the ozone concentration in the air within an effective and safe range.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Power supply

100‧‧‧A device that automatically adjusts the ozone emission concentration

110‧‧‧Photogenic ozone module

111‧‧‧Adjustable light source driver

111a‧‧‧Resonance circuit

111b‧‧‧Inverter circuit

112‧‧‧Hot cathode lamp

120‧‧‧Control circuit

121‧‧‧Feedback circuit

130‧‧‧Ozone sensor

140‧‧‧Air supply module

EE‧‧‧electric energy

EL‧‧‧Light energy

FB‧‧‧Feedback information

S210～S230, S330, S430‧‧‧ steps

FIG. 1 is a schematic diagram of a circuit block of an apparatus for automatically adjusting an ozone emission concentration according to an embodiment of the invention. 2 is a flow chart showing an operation method of an apparatus for automatically adjusting an ozone emission concentration according to an embodiment of the invention. 3 is a flow chart showing an operation method of an apparatus for automatically adjusting an ozone emission concentration according to another embodiment of the present invention. 4 is a flow chart showing an operation method of an apparatus for automatically adjusting an ozone emission concentration according to still another embodiment of the present invention. FIG. 5 is a schematic diagram showing the arrangement positions of the photo-generated ozone module, the ozone sensor, and the air supply module shown in FIG. 1 according to an embodiment of the invention. FIG. 6 is a schematic view showing the arrangement position of the photo-generated ozone module, the ozone sensor, and the air supply module shown in FIG. 1 according to another embodiment of the present invention. FIG. 7 is a schematic view showing the arrangement position of the photo-generated ozone module, the ozone sensor, and the air supply module shown in FIG. 1 according to still another embodiment of the present invention. FIG. 8 is a block diagram showing the circuit of the photo-generated ozone module shown in FIG. 1 according to an embodiment of the invention.

Claims (19)

A device capable of automatically adjusting an ozone emission concentration, comprising: an ozone sensor for sensing an ozone concentration in the air; and a photo-generated ozone module for photo-decomposing ultraviolet light in the device Ozone is generated in the airflow path, the photovoltaic ozone module includes an ultraviolet light source and an adjustable light source driver; a air supply module for manufacturing a wind flow in the air flow path; and a control circuit coupled to the An ozone sensor, the photo-generated ozone module, and the air supply module, wherein the control circuit obtains a feedback information related to a light energy generated by the ultraviolet light source from the ultraviolet light source, according to the ozone The concentration and the feedback information correspondingly control the adjustable light source driver to adjust an ozone yield, or control the air supply module according to the ozone concentration to adjust an air volume of the wind flow, or according to the ozone The concentration and the feedback information correspondingly control the adjustable light source driver and the air supply module to adjust the ozone yield and the air volume. The device of claim 1, wherein the ozone sensor is disposed in the wind flow path. The device of claim 2, wherein the ozone sensor is disposed in an air inlet section of the wind flow path. The device of claim 1, wherein the device is configured in a field, the ozone sensor being disposed in the field and outside the device. The device of claim 4, wherein the ozone sensor transmits a detection result related to the ozone concentration to the control circuit via a wire channel or a wireless communication channel. The apparatus of claim 1, wherein the ultraviolet light source is disposed in the wind flow path to generate the light energy, generate ozone in the wind flow path, and the adjustable light source driver The light source is coupled to the ultraviolet light source for providing an electrical energy to drive the ultraviolet light source to generate the light energy. The device of claim 6, wherein the ultraviolet light source comprises a hot cathode lamp, a cold cathode lamp, a quasi-molecular lamp or a light emitting diode, or the hot cathode lamp, a combination of a part or all of the cold cathode lamp, the excimer lamp, and the light emitting diode. The device of claim 6, wherein the control circuit controls the adjustable light source driver according to the ozone concentration to adjust an output power of the ultraviolet light source, thereby changing an outlet ozone of the device. concentration. The device of claim 6, wherein the control circuit controls the adjustable light source driver to adjust an output power of the electrical energy according to the air volume of the wind flow of the air supply module. The device of claim 9, wherein the control circuit adjusts the output power of the electrical energy to increase an output power of the ultraviolet light source when the air volume of the air supply module increases And when the air volume of the air supply module is reduced, the control circuit adjusts the output power of the electrical energy to reduce the output power of the ultraviolet light source. An operation method of a device capable of automatically adjusting an ozone emission concentration, comprising: sensing an ozone concentration in the air by an ozone sensor; and a wind flow in the device by ultraviolet photolysis of a photo-generated ozone module Generating ozone in the path, wherein the photo-generated ozone module comprises an ultraviolet light source and an adjustable light source driver; a wind flow module creates a wind flow in the wind flow path; and a control circuit obtains correlation from the ultraviolet light source And a feedback information of a light energy generated by the ultraviolet light source, and correspondingly controlling the adjustable light source driver according to the ozone concentration and the feedback information to adjust an ozone yield, or according to the ozone concentration corresponding control The air supply module adjusts an air volume of the wind flow, or controls the adjustable light source driver and the air supply module to adjust the ozone yield according to the ozone concentration and the feedback information. Air volume. The method of operation of claim 11, wherein the ozone sensor is disposed in the wind flow path. The method of operation of claim 11, wherein the ozone sensor is disposed in an air inlet section of the wind flow path. The method of operation of claim 11, wherein the apparatus is configured in a field, the ozone sensor being disposed in the field and outside the apparatus. The operating method of claim 14, wherein the ozone sensor transmits a detection result related to the ozone concentration to the control circuit via a wire channel or a wireless communication channel. The method of claim 11, wherein the step of generating ozone comprises: configuring the ultraviolet light source in the wind flow path; and providing an electric energy by the adjustable light source driver to drive the ultraviolet light source Producing the light energy by the ultraviolet light source to generate ozone in the wind flow path. The method of claim 16, wherein the step of generating ozone further comprises: controlling, by the control circuit, the adjustable light source driver according to the ozone concentration and the feedback information to adjust the An output power of electrical energy. The operation method of claim 17, wherein the step of generating ozone further comprises: controlling, by the control circuit, the adjustable light source driver according to the air volume of the wind flow of the air supply module To adjust the output power of the electrical energy. The operation method of claim 18, wherein the step of controlling the adjustable light source driver according to the air volume of the wind flow of the air supply module comprises: when the air volume of the air supply module When increasing, the control circuit adjusts the output power of the electrical energy to increase an output power of the ultraviolet light source; The control circuit adjusts the output power of the electrical energy to reduce the output power of the ultraviolet light source when the air volume of the air supply module is reduced.