Purification device, air conditioning system and control method

Abstract

The present application relates to air purification, and specifically provides a purification device, aiming at solving the problem that the existing purification device is difficult to efficiently deal with the scene with complex and changeable environmental factors. To this end, the purification device of the present application comprises a photocatalyst and a first generator set, the first generator set can irradiate the photocatalyst to excite the photocatalyst, the first generator set comprises: a first ultraviolet generator and a second ultraviolet generator, the first ultraviolet generator can emit long-wave ultraviolet light with a wavelength of a first wave band, and the second ultraviolet generator can emit long-wave ultraviolet light with a wavelength of a second wave band. In the case of good air quality, the first ultraviolet generator is turned on, and the excited photocatalyst produces a small amount of strong oxidizing substances, mainly for killing bacteria; in the case of poor air quality, the second ultraviolet generator is turned on, and the excited photocatalyst produces more strong oxidizing substances, mainly for killing bacteria and purifying odor molecules and VOC.

Description

Technical Field

[0001] This invention relates to the technical field of air purification, specifically providing a purification device, an air conditioning system, and a control method. Background Technology

[0002] With the improvement of living standards, home air conditioners have become an indispensable household appliance.

[0003] Some air conditioning systems are equipped with air purification devices that can purify the air and sterilize it. Currently, the purification devices used in air conditioning systems include ultraviolet (UV) generators and photocatalysts. The UV light emitted by the UV generator can kill bacteria. Simultaneously, the UV light can stimulate the photocatalyst, generating hydrocarbon free radicals. These free radicals react with organic matter in the air to produce non-toxic inorganic substances, thereby decomposing formaldehyde, eliminating odors, and killing bacteria. For highly polluted environments, the photocatalyst needs to be at a strong activation level so that the hydrocarbon free radicals generated can fully contact the pollutants, increasing the purification speed. For less polluted environments, the photocatalyst needs to be at a weak activation level; otherwise, excessive hydrocarbon free radicals generated by the photocatalyst can harm the human body. However, the environment in which the purification device operates is not entirely static, especially in the home environment. With seasonal changes, weather variations, and human interference, the level of air pollution can change. The purification device cannot specifically adjust the activation level of the photocatalyst, therefore it is insufficient to effectively cope with the complex and ever-changing environmental conditions.

[0004] Therefore, there is an urgent need for a purification device, air conditioning system, and control method to address the difficulty of existing purification devices in efficiently handling purification scenarios with complex and ever-changing environmental factors. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that existing purification devices are unable to efficiently cope with purification scenarios with complex and ever-changing environmental factors.

[0006] In a first aspect, the present invention provides a purification device, including a photocatalyst and a first generator group, the first generator group being capable of irradiating the photocatalyst to excite the photocatalyst, the first generator group comprising: a first ultraviolet generator capable of emitting long-wave ultraviolet light with a wavelength of a first band; and a second ultraviolet generator capable of emitting long-wave ultraviolet light with a wavelength of a second band; the wavelength of the first band being less than the wavelength of the second band.

[0007] In a specific embodiment of the above-mentioned purification device, the first generator group further includes a third ultraviolet generator, which is capable of emitting long-wave ultraviolet light with a wavelength of the third band, wherein the wavelength of the second band is smaller than the wavelength of the third band.

[0008] In a specific embodiment of the above-mentioned purification device, there are multiple first ultraviolet generators, and the number of first ultraviolet generators that are lit is controllable; and / or, there are multiple second ultraviolet generators, and the number of second ultraviolet generators that are lit is controllable; and / or, there are multiple third ultraviolet generators, and the number of third ultraviolet generators that are lit is controllable.

[0009] In a specific embodiment of the above-mentioned purification device, the wavelength of the first band is 320nm to 340nm, the wavelength of the second band is 350nm to 370nm, and the wavelength of the third band is 380nm to 400nm.

[0010] In a specific embodiment of the above-mentioned purification device, the purification device further includes: a housing, in which the first generator group and the photocatalyst are disposed; and a second generator group, disposed outside the housing, which irradiates short-wave ultraviolet light onto the outside of the housing.

[0011] In a second aspect, the present invention provides an air conditioning system, wherein the air conditioning system is provided with the purification device as described above.

[0012] In a third aspect, the present invention provides a control method for an air conditioning system, comprising: acquiring an air quality index; and controlling a first generator group according to the air quality index.

[0013] In a specific implementation of the control method for the above-mentioned air conditioning system, "controlling the first generator group according to air quality" includes: if the air quality index is less than a first preset value, controlling the first ultraviolet generator to turn on; and / or, if the air quality index is not less than the first preset value and is less than a second preset value, controlling the second ultraviolet generator to turn on; and / or, if the air quality index is not less than the second preset value, controlling the third ultraviolet generator to turn on.

[0014] In a specific implementation of the control method for the above-mentioned air conditioning system, the control method further includes: acquiring the number of people indoors; and determining the number of ultraviolet generators lit in the first generator group based on the number of people indoors.

[0015] In a specific implementation of the control method for the aforementioned air conditioning system, "determining the number of ultraviolet generators lit in the first generator group based on the number of people indoors" includes: if the number of people indoors is not greater than a first preset number, then the number of ultraviolet generators lit in the first generator group is at a first level; and / or, if the number of people indoors is not greater than a second preset number but greater than the first preset number, then the number of ultraviolet generators lit in the first generator group is at a second level; and / or, if the number of people indoors is greater than the second preset number, then the number of ultraviolet generators lit in the first generator group is at a third level; the second preset number is greater than the first preset number, and the number of ultraviolet generators lit in the first level, the second level, and the third level increases sequentially.

[0016] In a specific implementation of the control method for the above-mentioned air conditioning system, the control method further includes: obtaining whether there are elderly people or children in the room; and determining the number of ultraviolet generators lit in the first generator group based on whether there are elderly people or children in the room.

[0017] In a specific implementation of the control method for the aforementioned air conditioning system, "determining the number of ultraviolet generators lit in the first generator group based on whether there are elderly people or children in the room" includes: if there are no elderly people or children in the room, the number of ultraviolet generators lit in the first generator group remains unchanged; and / or, if there are elderly people or children in the room, the number of ultraviolet generators lit in the first generator group is increased by one level.

[0018] In a specific implementation of the control method for the above-mentioned air conditioning system, the control method further includes: acquiring the indoor bacterial content; and determining the number of ultraviolet generators that are lit in the first generator group based on the bacterial content.

[0019] In a specific implementation of the control method for the aforementioned air conditioning system, "determining the number of ultraviolet generators lit in the first generator group based on the bacterial content" includes: if the bacterial content is not greater than a first preset content, the number of ultraviolet generators lit in the first generator group is at a first level; and / or, if the bacterial content is not greater than a second preset content but greater than the first preset content, the number of ultraviolet generators lit in the first generator group is at a second level; and / or, if the bacterial content is greater than the second preset content, the number of ultraviolet generators lit in the first generator group is at a third level; the second preset content is greater than the first preset content, and the first level, the second level, and the third level increase sequentially.

[0020] In a specific embodiment of the control method for the above-mentioned air conditioning system, the control method further includes: acquiring the indoor carbon dioxide concentration; and determining the number of ultraviolet generators that are lit in the first generator group based on the carbon dioxide concentration.

[0021] In a specific implementation of the control method for the aforementioned air conditioning system, "determining the number of ultraviolet generators lit in the first generator group based on the concentration of carbon dioxide" includes: if the concentration of carbon dioxide is not greater than a first preset concentration, the number of ultraviolet generators lit in the first generator group is at a first level; and / or, if the concentration of carbon dioxide is not greater than a second preset concentration but greater than the first preset concentration, the number of ultraviolet generators lit in the first generator group is at a second level; and / or, if the concentration of carbon dioxide is greater than the second preset concentration, the number of ultraviolet generators lit in the first generator group is at a third level; the first preset concentration and the second preset concentration increase sequentially, and the first level, the second level, and the third level increase sequentially.

[0022] In a specific embodiment of the control method for the air conditioning system described above, the air conditioning system includes a second generator group, which is capable of emitting short-wave ultraviolet light. The control method further includes: acquiring the operating status of the air conditioning system; and controlling the second generator group according to the operating status of the air conditioning system.

[0023] In a specific implementation of the control method for the air conditioning system described above, "controlling the second generator group according to the operating state of the air conditioning system" includes: if the operating state of the air conditioning system is standby, then controlling the second generator group to run for a first preset time after the air conditioning system is turned off; and / or, if the operating state of the air conditioning system is on, then keeping the second generator group in the operating state.

[0024] In a specific implementation of the control method for the above-mentioned air conditioning system, the control method further includes: acquiring current day and night information; and determining the number of ultraviolet generators in the second generator group that are lit based on the current day and night information.

[0025] In a specific implementation of the control method for the above-mentioned air conditioning system, "determining the number of ultraviolet generators lit in the second generator group based on the current day-night information" includes: if the current day-night information is daytime, then the number of ultraviolet generators lit in the second generator group is a first preset amount; and / or, if the current day-night information is nighttime, then the number of ultraviolet generators lit in the second generator group is a second preset amount.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The purification device provided by this invention includes a photocatalyst and a first generator group. The first generator group can irradiate the photocatalyst to activate it. The first generator group includes a first ultraviolet generator and a second ultraviolet generator. The first ultraviolet generator emits long-wave ultraviolet light with a first wavelength, and the second ultraviolet generator emits long-wave ultraviolet light with a second wavelength. The wavelength of the first wavelength is shorter than that of the second wavelength. When air quality is good, the levels of bacteria, odor molecules, and VOCs in the air are low. The first ultraviolet generator is activated, irradiating the photocatalyst with shorter wavelength ultraviolet light. The activated photocatalyst produces a small amount of strong oxidizing substances, primarily to kill bacteria, ensuring air purification efficiency without harming the human body. When air quality is poor, the levels of bacteria, odor molecules, and VOCs in the air may be higher. The second ultraviolet generator is activated, irradiating the photocatalyst with longer wavelength ultraviolet light. The activated photocatalyst produces more strong oxidizing substances to kill bacteria and purify odor molecules and VOCs, ensuring air purification efficiency without harming the human body. Attached Figure Description

[0028] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0029] Figure 1 This is a schematic diagram of the overall structure of the purification device provided by the present invention;

[0030] Figure 2 This is an exploded structural diagram of the purification device provided by the present invention;

[0031] Figure 3 This is a flowchart of the main steps of the air conditioning system control method provided in Embodiment 1 of the present invention;

[0032] Figure 4 This is a flowchart of the control method for an air conditioning system provided in Embodiment 1 of the present invention;

[0033] Figure 5 This is a flowchart of the control method for the air conditioning system provided in Embodiment 3 of the present invention;

[0034] Figure 6 This is a flowchart of the control method for an air conditioning system provided in Embodiment 4 of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Shell; 11. First cover; 12. Second cover; 13. Light-transmitting hole; 2. First plate; 21. First generator group; 3. Second plate; 31. Second generator group; 4. Carrier plate. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Example 1

[0041] To address the challenge that existing purification devices struggle to efficiently handle complex and ever-changing environmental conditions, this invention provides an air conditioning system that includes a purification device.

[0042] like Figure 1 and Figure 2As shown, the purification device includes a housing 1, a first plate 2, a second plate 3, and a carrier plate 4, all of which are disposed within the housing 1. The carrier plate 4 is coated with a photocatalyst. The first plate 2 is equipped with a first generator assembly 21, which generates long-wave ultraviolet light, also known as UVA (ultraviolet radiation A), with a wavelength between 320nm and 400nm. The first generator assembly 21 irradiates the carrier plate 4 with ultraviolet light to activate the photocatalyst, performing sterilization, deodorization, or formaldehyde removal, etc. The second plate 3 is equipped with a second generator assembly 31, which generates short-wave ultraviolet light. Short-wave ultraviolet light, also known as UVC (ultraviolet radiation C), has a wavelength between 100nm and 280nm and possesses excellent bactericidal capabilities. The second generator assembly 31 irradiates ultraviolet light onto the outside of the housing 1 to kill bacteria in the air passing outside the housing 1. The housing 1 is hollowed out. When the air flows through the purification device, some air enters the housing 1 and flows through the carrier plate 4. At this time, the first generator group 21 activates the photocatalyst to produce strong oxidizing substances, which kill bacteria flowing through the carrier plate 4 and decompose odor molecules and formaldehyde molecules flowing through the carrier plate 4, thereby purifying the air. The other part of the air flows through the outside of the housing 1 and is irradiated by short-wave ultraviolet light emitted by the second generator group 31, thereby killing bacteria in the air and purifying the air.

[0043] The carrier plate 4 includes a substrate, which is a porous material such as aluminum or honeycomb ceramic, and the surface of the substrate is coated with a photocatalyst. Under light irradiation, the photocatalyst can generate strong oxidizing substances (such as hydroxyl radicals, oxygen, etc.), which can be used to decompose organic compounds, some inorganic compounds, bacteria and viruses, etc. It can effectively degrade toxic and harmful gases in the air (such as formaldehyde), efficiently purify the air, effectively kill a variety of bacteria, and decompose and render harmless the toxins released by bacteria or fungi.

[0044] The surface of a photocatalyst possesses a strong electron-withdrawing capacity, which can oxidize hydroxide ions and water molecules adsorbed on the photocatalyst surface into hydroxyl radicals. Relying on the extremely strong oxidizing power of hydroxyl radicals, they can effectively decompose various organic compounds with unstable chemical bonds and some inorganic substances, ultimately degrading them into harmless small molecules such as water and carbon dioxide. Furthermore, hydroxyl radicals can destroy bacterial cell membranes and coagulate viral protein carriers, thus playing a bactericidal role. Therefore, during the photocatalytic sterilization and air purification process, the photocatalyst itself is not consumed, eliminating the need to replace the carrier plate 4. The purification device also has a long lifespan and can operate continuously, effectively reducing the maintenance costs of the purification device.

[0045] The photocatalyst is TiO2, which has high chemical stability and is harmless to the human body. After the TiO2 stock solution is coated on the surface of the substrate, it dries quickly and becomes a water-insoluble substance. The dried TiO2 has high hardness, and under conditions of mild environmental pollution, it will not change or be lost as long as it is not worn or peeled off. Furthermore, because TiO2 can decompose organic and some inorganic substances when exposed to light, it can decompose some of the contaminants adhering to the surface of the substrate, requiring only water washing to clean the substrate. Of course, in other embodiments, the photocatalyst can be ZrO2, ZnO, CdS, WO3, Fe2O3, PbS, SnO2, ZnS, SrTiO3, SiO2, etc.

[0046] The first generator group 21 includes a first ultraviolet generator and a second ultraviolet generator. The first ultraviolet generator is capable of emitting ultraviolet light with a wavelength in a first band. The second ultraviolet generator is capable of emitting ultraviolet light with a wavelength in a second band, wherein the wavelength of the first band is shorter than the wavelength of the second band. Specifically, the wavelength of the first band is 320nm to 340nm, and the wavelength of the second band is 350nm to 370nm.

[0047] The first and second ultraviolet generators can be arranged randomly or in a row on the first plate 2. Arranging them in a row makes it easier to individually control the activation and deactivation of the first and second ultraviolet generators.

[0048] The photocatalyst coated on the surface of carrier plate 4 has a certain coating thickness, and the light that excites the photocatalyst needs to have a certain intensity. Therefore, commonly used ultraviolet light is selected as the excitation light source. Experimental studies have shown that in long-wave ultraviolet light, the longer the wavelength of ultraviolet light, the stronger its penetrating ability. When the photocatalyst is irradiated, the amount of strong oxidizing substances produced by the photocatalyst is greater, resulting in higher sterilization efficiency and higher efficiency in removing odors and formaldehyde.

[0049] The first and second ultraviolet generators are generally not lit at the same time; that is, when the first ultraviolet generator is lit, the second ultraviolet generator is off, and when the second ultraviolet generator is lit, the first ultraviolet generator is off.

[0050] Furthermore, multiple first and second ultraviolet generators are provided, and the number of each generator illuminated is controllable. The number of illuminated first and second ultraviolet generators is generally divided into multiple levels. Specifically, in this embodiment, the number of both first and second ultraviolet generators in the generator group 21 is five, and the number of illuminated generators is divided into three levels: one, three, and five. The more first or second ultraviolet generators are illuminated, the more strong oxidizing substances are generated by the photocatalyst. Of course, in other embodiments, the number of illuminated first and second ultraviolet generators can also be divided into other levels, all of which should be included within the scope of protection of this invention.

[0051] The strong oxidizing substances produced when photocatalysts are activated can kill bacteria and decompose odor molecules and VOCs (volatile organic compounds) such as formaldehyde. In environments with high levels of bacteria, odor molecules, and VOCs, insufficient production of strong oxidizing substances from the photocatalyst will prolong air purification time and reduce efficiency. Conversely, in environments with low levels of bacteria, odor molecules, and VOCs, excessive production of strong oxidizing substances that cannot be consumed promptly may pose a health risk. Therefore, it is crucial to activate photocatalysts appropriately in suitable environments to ensure air purification efficiency without causing harm to human health.

[0052] Specifically, when air quality is good, the levels of bacteria, odor molecules, and VOCs in the air are low. The first ultraviolet generator is turned on, using short-wavelength ultraviolet light to irradiate the photocatalyst. The excited photocatalyst produces a small amount of strong oxidizing substances, primarily to kill bacteria, ensuring air purification efficiency without harming the human body. When air quality is poor, the levels of bacteria, odor molecules, and VOCs in the air may be higher. The second ultraviolet generator is turned on, using longer-wavelength ultraviolet light to irradiate the photocatalyst. The excited photocatalyst produces more strong oxidizing substances to kill bacteria and purify odor molecules and VOCs, ensuring air purification efficiency without harming the human body.

[0053] The housing 1 includes a first cover 11 and a second cover 12, which can be joined and closed. The first cover 11 and the second cover 12 can be fixed by welding, snap-fit, or other connection methods. The bottom plate of the first cover 11 and the bottom plate of the second cover 12 are provided with ventilation holes to ensure that after air flows through the housing 1, some air can flow from the inside of the housing 1 through the carrier plate 4, thereby releasing the strong oxidizing substances generated by the photocatalyst.

[0054] The first cover 11 or the second cover 12 has a mounting position on its side, and a light-transmitting hole 13 is opened on the side of the first cover 11 or the second cover 12. The second plate 3 is installed at the mounting position, and the ultraviolet generator in the second generator group 31 can be aligned with the light-transmitting hole 13 to ensure that the ultraviolet generator in the second generator group 31 can irradiate short-wave ultraviolet light onto the outside of the housing 1 to kill bacteria in the air passing around the outer periphery of the housing 1. The number of ultraviolet generators in the second generator group 31 is specifically two, but in other embodiments, other numbers can be set.

[0055] Regarding the purification device, it should be noted that although the purification device is installed in the air conditioning system in this embodiment, this is not a specific limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art can also apply the purification device to air purifiers, commercial air conditioners, or fresh air systems in other embodiments, and all of these should be included within the protection scope of the present invention.

[0056] like Figure 3 As shown, this embodiment provides a control method for an air conditioning system, which mainly includes the following steps:

[0057] S1. Obtaining the Air Quality Index (AQI). The AQI is a simplified conceptual index value that simplifies the concentrations of several commonly monitored air pollutants into a single value, based on ambient air quality standards and the impact of various pollutants on human health, ecology, and the environment. The AQI can be provided by weather stations, acquired via communication methods, and uploaded to the air conditioning system so that the system can access it. Alternatively, the AQI can be obtained through detection and calculation by a detection module installed within the air conditioning system. Both methods should be included within the scope of protection of this invention.

[0058] S2. Control the first generator group according to the air quality index, specifically including: if the air quality index is less than the first preset value, it indicates that the content of odor molecules and VOCs in the air is low, so control the first ultraviolet generator to turn on, using ultraviolet light with a shorter wavelength to irradiate the photocatalyst. The excited photocatalyst produces a small amount of strong oxidizing substances, mainly to kill bacteria; if the air quality index is not less than the first preset value and less than the second preset value, it indicates that the content of odor molecules and VOCs in the air is high, so control the second ultraviolet generator to turn on, using ultraviolet light with a longer wavelength to irradiate the photocatalyst. The excited photocatalyst produces more strong oxidizing substances, to kill bacteria and purify odor molecules and VOCs. The first preset value is less than the second preset value; specifically, the first preset value is 100 and the second preset value is 200.

[0059] like Figure 4 As shown, in some embodiments, the control method for the air conditioning system further includes:

[0060] S3. Obtain the number of people indoors. This can be done by manual input from the user. In some examples, the air conditioning system can also connect to an indoor camera to analyze the data and obtain the number of people indoors, then upload the information to the air conditioning system.

[0061] S4. Determine the number of ultraviolet generators to be lit in the first generator group based on the number of people indoors. Specifically, the process includes the following: If the number of people indoors is no greater than the first preset number, it indicates that the amount of waste gas and bacteria carried by human activity is relatively low, and the room's purification needs are low. The number of UV generators lit in the first generator group is at the first level, the amount of photocatalyst excited is relatively low, and the strong oxidizing substances produced can match the amount of bacteria and waste gas in the room, thus reducing energy consumption. If the number of people indoors is no greater than the second preset number but greater than the first preset number, it indicates that the amount of waste gas and bacteria carried by human activity is at a medium level, and the room's purification needs are at a medium level. The number of UV generators lit in the first generator group is at the second level, the amount of photocatalyst excited is at a medium level, and the strong oxidizing substances produced can match the amount of bacteria and waste gas in the room, thus reducing energy consumption. If the number of people indoors is greater than the second preset number, it indicates that the amount of waste gas and bacteria carried by human activity is at a high level, and the room's purification needs are high. The number of UV generators lit in the first generator group is at the third level, the amount of photocatalyst excited is relatively high, and the strong oxidizing substances produced can match the amount of bacteria and waste gas in the room.

[0062] The second preset number of participants is greater than the first preset number, and the number of UV generators lit in the first, second, and third levels increases sequentially. Specifically, the first preset number of participants is one person, and the second preset number is four people. The first level has one UV generator lit, the second level has three, and the third level has five.

[0063] S5. Determine if there are elderly people or children indoors. This can be done by manual input from the user. In some examples, the air conditioning system can also connect to an indoor camera to analyze the footage and determine if there are elderly people or children inside, then upload the information to the air conditioning system.

[0064] S6. Determine the number of UV generators activated in the first generator group based on whether there are elderly people or children indoors. Specifically: If there are no elderly people or children indoors, the normal level of air purification capacity is sufficient to meet the purification needs, and the number of UV generators activated in the first generator group remains unchanged; if there are elderly people or children indoors, because the elderly and children have lower immunity and a higher demand for air purification capacity, the number of UV generators activated in the first generator group is increased by one level. Increasing the number of activated UV generators by one level specifically means: if it was previously at level one, it is increased to level two; if it was previously at level two, it is increased to level three; if it was previously at level three, it remains unchanged.

[0065] S7. Obtain the operating status of the air conditioning system. The operating status of the air conditioning system includes standby and on.

[0066] S8. Controlling the second generator group according to the operating status of the air conditioning system specifically includes: if the air conditioning system is in standby mode, controlling the second generator group to run for a first preset time after the air conditioning system is turned off, so that the ultraviolet generator in the second generator group can sterilize the interior of the air conditioning system, reduce the residual amount of bacteria in the air conditioning system, and thus reduce the reproduction of bacteria in the air conditioning system; if the air conditioning system is in on mode, keeping the second generator group in operation to continuously sterilize and purify the air flowing outside the casing. The first preset time is specifically 30 minutes. Of course, in other embodiments, the first preset time can be set to other values.

[0067] S9. Obtain current day / night information. The current day / night information can be determined by the time period of a clock, for example, setting 6 PM to 6 AM as night and the rest of the time as day. In other embodiments, a light sensor can be installed in the air conditioning system to determine the day / night information.

[0068] S10. Determine the number of ultraviolet generators in the second generator group to be lit based on the current day / night information. Specifically, if the current day / night information is daytime, the number of ultraviolet generators in the second generator group to be lit is a first preset amount to ensure sufficient and efficient sterilization. If the current day / night information is nighttime, the number of ultraviolet generators in the second generator group to be lit is a second preset amount, which is less than the first preset amount, to prevent the brightness generated by the second generator group from being too high and scattering out of the air conditioning system, thus affecting the user's sleep. Specifically, the number of ultraviolet generators in the second generator group is two, the first preset amount is two, and the second preset amount is one.

[0069] Example 2

[0070] This embodiment provides an air conditioning system, which includes a purification device. The structure of the purification device is basically the same as that of the purification device provided in Embodiment 1, except that the first generator group 21 further includes a third ultraviolet generator. The third ultraviolet generator can emit ultraviolet light with a wavelength of the third band, which is longer than the wavelength of the second band. Specifically, the wavelength of the third band is 380nm to 400nm.

[0071] During the operation of the first generator group 21, one of the first ultraviolet generator, the second ultraviolet generator, and the third ultraviolet generator may be turned on.

[0072] The control method for the air conditioning system provided in this embodiment is basically the same as the control method for the air conditioning system provided in Embodiment 1, except that step S2 is different. In the control method for the air conditioning system provided in this embodiment, step S2 is as follows:

[0073] S2. Control the first generator group according to the air quality index, specifically including: If the air quality index is less than the first preset value, it indicates that the content of odor molecules and VOCs in the air is low. Control the first ultraviolet generator to turn on, using ultraviolet light with a shorter wavelength to irradiate the photocatalyst. The excited photocatalyst produces a small amount of strong oxidizing substances, mainly to kill bacteria; If the air quality index is not less than the first preset value and less than the second preset value, it indicates that the content of odor molecules and VOCs in the air is high. Control the second ultraviolet generator to turn on, using ultraviolet light with a longer wavelength to irradiate the photocatalyst. The excited photocatalyst produces more strong oxidizing substances, to kill bacteria and purify odor molecules and VOCs; If the air quality index is greater than the second preset value, it indicates that the content of bacteria, odor molecules and VOCs in the air is very high. Control the third ultraviolet generator to turn on, using ultraviolet light with the longest wavelength to irradiate the photocatalyst. The excited photocatalyst produces a large amount of strong oxidizing substances, to kill bacteria and purify odor molecules and VOCs, especially suitable for indoor environments with excessive formaldehyde content. The first preset value is less than the second preset value. Specifically, the first preset value is 100 and the second preset value is 200.

[0074] Example 3

[0075] This invention provides a control method for an air conditioning system, which is largely the same as the control method for an air conditioning system provided in Embodiment 2, except that steps S3 and S4 are different.

[0076] Specifically, such as Figure 5 As shown, steps S3 and S4 of the control method for the air conditioning system provided in this embodiment are as follows:

[0077] S3. Obtain the indoor carbon dioxide concentration. A carbon dioxide detection module can be installed in the air conditioning system to obtain the indoor carbon dioxide concentration.

[0078] S4. Determine the number of UV generators activated in the first generator group based on the indoor carbon dioxide concentration. Specifically: If the carbon dioxide concentration is not greater than the first preset concentration, it indicates that there are few people indoors, the amount of exhaust gas and bacteria carried by human activities is low, and the room's purification needs are low. In this case, the number of UV generators activated in the first generator group is at the first level, the amount of photocatalyst excited is low, and the generated strong oxidizing substances can match the amount of bacteria and exhaust gas in the room. If the carbon dioxide concentration is not greater than the second preset concentration but greater than the first preset concentration, it indicates that the number of people indoors is at a moderate level, the amount of exhaust gas and bacteria carried by human activities is at a moderate level, and the room's purification needs are low. If the concentration of carbon dioxide is greater than the second preset concentration, it indicates that there are many people active indoors, and the amount of waste gas and bacteria generated by human activity is at a high level, requiring higher purification in the room. In this case, the number of ultraviolet generators lit in the first generator group is at the third level, and the amount of photocatalyst excited is relatively large, producing strong oxidizing substances that match the amount of bacteria and waste gas in the room.

[0079] The first and second preset concentrations increase sequentially, as do the first, second, and third levels. Specifically, the first preset concentration is 1500 ppm (i.e., 1500 parts per million of gas volume), and the second preset concentration is 2000 ppm (i.e., 2000 parts per million of gas volume). The first level involves lighting one light, the second level involves lighting three lights, and the third level involves lighting five lights.

[0080] Example 4

[0081] This invention provides a control method for an air conditioning system, which is largely the same as the control method for an air conditioning system provided in Embodiment 2, except that steps S3 and S4 are different.

[0082] Specifically, such as Figure 6 As shown, steps S3 and S4 of the control method for the air conditioning system provided in this embodiment are as follows:

[0083] S3. Obtain indoor bacterial levels. A bacterial detection module can be installed in the air conditioning system to obtain the indoor carbon dioxide concentration.

[0084] S4. Determine the number of UV generators to be lit in the first generator group based on the indoor bacterial content. Specifically: if the bacterial content is not greater than a first preset content, the room's purification needs are low, the number of UV generators lit in the first generator group is at level one, the amount of photocatalyst excited is small, and the generated strong oxidizing substances can match the amount of bacteria and exhaust gas in the room; if the bacterial content is not greater than a second preset content but greater than a first preset content, the room's purification needs are at an intermediate level, the number of UV generators lit in the first generator group is at level two, the amount of photocatalyst excited is moderate, and the generated strong oxidizing substances can match the amount of bacteria and exhaust gas in the room; if the bacterial content is greater than a second preset content, the room's purification needs are high, the number of UV generators lit in the first generator group is at level three, the amount of photocatalyst excited is large, and the generated strong oxidizing substances can match the amount of bacteria and exhaust gas in the room.

[0085] The second preset content is greater than the first preset content, and the first, second, and third levels increase sequentially. Specifically, the first preset content is 500 cfu / cm³, and the second preset content is 700 cfu / cm³. The first level lights up one chip, the second level lights up three chips, and the third level lights up five chips.

[0086] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An air conditioning system, comprising a purification device, the purification device comprising a photocatalyst and a first generator group (21), the first generator group (21) being capable of irradiating the photocatalyst to excite the photocatalyst, characterized in that, The first generator group (21) includes: The first ultraviolet generator is capable of emitting long-wave ultraviolet light with a wavelength in the first band; The second ultraviolet generator is capable of emitting long-wave ultraviolet light in the second wavelength band; The wavelength of the first band is shorter than that of the second band; The first ultraviolet generator is provided in multiple forms, and the number of the first ultraviolet generators that are lit is controllable; Multiple second ultraviolet generators are provided, and the number of second ultraviolet generators that are lit is controllable; The purification device also includes: The housing (1) is provided inside the first generator group (21) and the photocatalyst; The second generator group (31) is disposed outside the housing (1) and irradiates short-wave ultraviolet light onto the outside of the housing (1); If the air conditioning system is in standby mode, the second generator group is controlled to run for a first preset time after the air conditioning system is turned off; If the air conditioning system is in the "on" state, then the second generator group remains in the "on" state.

2. The air conditioning system according to claim 1, characterized in that, The first generator group (21) also includes a third ultraviolet generator, which is capable of emitting long-wave ultraviolet light with a wavelength of the third band, wherein the wavelength of the second band is smaller than the wavelength of the third band.

3. The air conditioning system according to claim 2, characterized in that, The third ultraviolet generator is provided in multiple forms, and the number of the third ultraviolet generators that are lit is controllable.

4. The air conditioning system according to claim 2, characterized in that, The wavelength of the first band is 320nm to 340nm, the wavelength of the second band is 350nm to 370nm, and the wavelength of the third band is 380nm to 400nm.

5. A control method for an air conditioning system as described in any one of claims 2-4, characterized in that, include: Get the air quality index; The first generator group is controlled according to the air quality index.

6. The control method for an air conditioning system according to claim 5, characterized in that, "According to the first air quality control generator group" includes: If the air quality index is less than a first preset value, control the first ultraviolet generator to turn on; and / or, If the air quality index is not less than a first preset value and is less than a second preset value, control the second ultraviolet generator to turn on; and / or, If the air quality index is not less than the second preset value, control the third ultraviolet generator to turn on.

7. The control method for an air conditioning system according to claim 5, characterized in that, The control method further includes: Get the number of people indoors; The number of ultraviolet generators that are lit in the first generator group is determined based on the number of people in the room.

8. The control method for an air conditioning system according to claim 7, characterized in that, "Determining the number of lit ultraviolet generators in the first generator group based on the number of people indoors" includes: If the number of people indoors is not greater than a first preset number, then the number of ultraviolet generators lit in the first generator group is at the first level; and / or, If the number of people indoors is not greater than the second preset number and is greater than the first preset number, then the number of ultraviolet generators lit in the first generator group is at the second level; and / or, If the number of people indoors is greater than the second pre-number, then the number of ultraviolet generators lit in the first generator group is the third level; The second preset number of people is greater than the first preset number of people, and the number of ultraviolet generators lit in the first level, the second level and the third level increases sequentially.

9. The control method for an air conditioning system according to claim 7, characterized in that, The control method further includes: Find out if there are elderly people or children indoors; The number of ultraviolet generators lit in the first generator group is determined based on whether there are elderly people or children in the room.

10. The control method for an air conditioning system according to claim 9, characterized in that, "Determining the number of lit ultraviolet generators in the first generator group based on whether there are elderly people or children indoors" includes: If there are no elderly people or children indoors, the number of UV generators lit in the first generator group remains unchanged; and / or, If there are elderly people or children in the room, the number of UV generators lit in the first generator group is increased by one level.

11. The control method for an air conditioning system according to claim 6, characterized in that, The control method further includes: To obtain the indoor bacterial count; The number of ultraviolet generators that are lit in the first generator group is determined based on the bacterial content.

12. The control method for an air conditioning system according to claim 11, characterized in that, "Determining the number of illuminated ultraviolet generators in the first generator group based on the bacterial content" includes: If the bacterial content is not greater than a first preset content, then the number of ultraviolet generators lit in the first generator group is at the first level; and / or, If the bacterial content is not greater than a second preset content and is greater than a first preset content, then the number of ultraviolet generators lit in the first generator group is at the second level; and / or, If the bacterial content is greater than the second preset content, then the number of ultraviolet generators lit in the first generator group is the third level. The second preset content is greater than the first preset content, and the first level, the second level and the third level increase sequentially.

13. The control method for an air conditioning system according to claim 6, characterized in that, The control method further includes: To obtain the indoor carbon dioxide concentration; The number of ultraviolet generators that are lit in the first generator group is determined based on the concentration of carbon dioxide.

14. The control method for an air conditioning system according to claim 13, characterized in that, "Determining the number of ultraviolet generators lit in the first generator group based on the concentration of carbon dioxide" includes: If the concentration of carbon dioxide is not greater than a first preset concentration, then the number of ultraviolet generators lit in the first generator group is at the first level; and / or, If the concentration of carbon dioxide is not greater than a second preset concentration but greater than a first preset concentration, then the number of ultraviolet generators lit in the first generator group is at the second level; and / or, If the concentration of carbon dioxide is greater than the second preset concentration, then the number of ultraviolet generators lit in the first generator group is the third level. The first preset concentration and the second preset concentration increase sequentially, and the first level, the second level and the third level increase sequentially.

15. The control method for an air conditioning system according to any one of claims 5-14, characterized in that, The control method further includes: Obtain current day / night information; The number of ultraviolet generators lit in the second generator group is determined based on the current day / night information.

16. The control method for an air conditioning system according to claim 15, characterized in that, "Determining the number of ultraviolet generators lit in the second generator group based on current day / night information" includes: If the current day / night information is daytime, then the number of ultraviolet generators lit in the second generator group is the first preset amount; and / or, If the current day / night information is night, then the number of ultraviolet generators lit in the second generator group is the second preset amount.

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