Fresh air module for air conditioner, air conditioner and control method

Abstract

The invention relates to the technical field of air purification, and provides a fresh air module for an air conditioner, the air conditioner and a control method.The fresh air module comprises a fresh air fan, a catalysis module, a shell and an ozone generation module, and the fresh air fan is provided with an exhaust inlet and an air outlet; the catalysis module is arranged at the exhaust inlet; the shell is connected to the fresh air fan, an air inlet cavity communicating with the air suction opening is defined between the shell and the fresh air fan, and the shell is provided with an air inlet; the ozone generation module is arranged at the air inlet. Indoor polluted air enters from the air inlet and enters the catalysis module together with ozone generated by the ozone generation module, and the ozone is decomposed to generate reactive oxygen free radicals in the process of passing through the catalysis module, so that volatile organic compounds and harmful inorganic gases in the indoor polluted air can be decomposed into green and harmless CO2 and H2O; the air is conveyed into a room through the air outlet, so that the indoor air is purified; catalytic materials do not need to be replaced, and the operation cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and in particular to a fresh air module for an air conditioner, an air conditioner and a control method. Background Art

[0002] With the development of society and the improvement of people's living standards, indoor air quality has become a focus of attention. Especially in hot or cold seasons, air conditioning systems are almost indispensable equipment for indoor air conditioning. However, using air conditioners with doors and windows closed for a long time will lead to poor indoor air circulation and increase the risk of indoor air pollution, thus posing a threat to the health of residents. Therefore, the development of effective indoor air purification technology is of great significance to improving the performance of air conditioning systems and improving indoor air quality.

[0003] In the prior art, indoor air purification technology mainly involves installing a filter at the air inlet. The filter uses adsorption technology, which fixes harmful substances in the air on the surface of a specific material through physical or chemical methods to achieve the purpose of purifying the air. However, the filter is a consumable. As the use time increases, its adsorption capacity will gradually decrease. It needs to be replaced regularly to ensure the purification effect. Frequent replacement of the filter increases the user's maintenance cost. After the adsorption is saturated, the filter may release the adsorbed pollutants into the air again, becoming a potential source of pollutant release, further deteriorating the indoor air quality. Summary of the invention

[0004] The present invention provides a fresh air module for an air conditioner, an air conditioner and a control method, which are used to solve the defects of the prior art that the adsorption technology is used to purify indoor air, which increases the cost and even deteriorates the indoor air quality.

[0005] The present invention provides a fresh air module for an air conditioner, comprising: A fresh air fan, wherein the fresh air fan has an air intake and an air outlet; A catalytic module, arranged at the air inlet; A housing connected to the fresh air fan, wherein an air inlet cavity connected to the air inlet is formed between the housing and the fresh air fan, and the housing is provided with an air inlet; The ozone generating module is arranged at the air inlet.

[0006] According to a fresh air module for an air conditioner provided by the present invention, the catalytic module is located in the air inlet cavity.

[0007] According to a fresh air module for an air conditioner provided by the present invention, the shell and the fresh air blower are detachably connected.

[0008] According to a fresh air module for an air conditioner provided by the present invention, the air outlet is provided with an ozone measuring element.

[0009] According to a fresh air module for an air conditioner provided by the present invention, the ratio of the air volume of the fresh air fan to the cross-sectional area of ​​the catalytic module is a first ratio, and the first ratio is less than or equal to a first preset value.

[0010] According to a fresh air module for an air conditioner provided by the present invention, the ratio of the thickness of the catalytic module to the first ratio is a second ratio, and the second ratio is greater than a second preset value.

[0011] According to a fresh air module for an air conditioner provided by the present invention, the ozone generating module includes an ozone generator.

[0012] According to a fresh air module for an air conditioner provided by the present invention, the catalytic module includes a catalytic filter.

[0013] The present invention also provides an air conditioner, comprising a shell and a fresh air module for the air conditioner as described in any one of the above items arranged in the shell, the shell being provided with a first air outlet connected to the air inlet and a second air outlet connected to the air outlet.

[0014] The present invention also provides a control method for a fresh air module of an air conditioner as described in any one of the above, the method comprising: receiving purification instructions; Based on the purification instruction, the fresh air module is controlled to enter the purification mode; in the purification mode, the fresh air fan and the ozone generating module are turned on to allow the indoor polluted air to mix with the ozone generated by the ozone generating module through the air inlet, and the purified air after oxidation and decomposition by the catalytic module is discharged from the air outlet.

[0015] According to a control method for a fresh air module of an air conditioner provided by the present invention, after turning on the fresh air blower and the ozone generating module based on the purification instruction, the method further comprises: Obtaining the amount of ozone at the air outlet; When the amount of ozone is greater than the ozone threshold, the amount of ozone generated by the ozone generating module is reduced and / or the rotation speed of the fresh air fan is reduced.

[0016] The fresh air module for the air conditioner provided by the present invention is provided with a catalytic module through the air inlet of the fresh air fan, and an ozone generating module is provided at the air inlet. Indoor polluted air enters from the air inlet and enters the catalytic module together with ozone generated by the ozone generating module. The ozone is decomposed to generate active oxygen free radicals during the process of passing through the catalytic module, and the volatile organic matter and harmful inorganic gas in the indoor polluted air can be decomposed into green and harmless CO2 and H2O, and the CO2 and H2O are transported to the room through the air outlet to purify the indoor air. There is no need to replace the catalytic material, and the operation cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of the fresh air module for the air conditioner provided by the present invention.

[0019] Figure 2 This is the second structural schematic diagram of the fresh air module for the air conditioner provided by the present invention.

[0020] Figure 3 This is the third structural schematic diagram of the fresh air module for the air conditioner provided by the present invention.

[0021] Figure 4 yes Figure 3 AA section view of the structure.

[0022] Figure 5 It is a partial structural schematic diagram of a fresh air module for an air conditioner provided by the present invention.

[0023] Figure 6 It is a schematic diagram of the principle structure of the air conditioner indoor unit provided by the present invention.

[0024] Figure 7 This is one of the flow charts of the control method for the fresh air module of the air conditioner provided by the present invention.

[0025] Figure 8 This is the second flow chart of the control method for the fresh air module of the air conditioner provided by the present invention.

[0026] Fig. 9 This is the third flow chart of the control method for the fresh air module of the air conditioner provided by the present invention.

[0027] Fig.10 It is a structural schematic diagram of a control device for a fresh air module of an air conditioner provided by the present invention.

[0028] Fig.11 It is a structural schematic diagram of the electronic device provided by the present invention.

[0029] Reference numerals: 10. Fresh air module; 11. Fresh air fan; 12. Catalytic module; 13. Shell; 14. Ozone generating module; 15. Air inlet; 16. Air outlet; 17. Air inlet; 18. Air inlet chamber; 19. Control unit; 20. Casing; 21. First air outlet; 22. Second air outlet. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Combine the following Figure 1-Figure 6 The fresh air module for an air conditioner and the air conditioner of the present invention are described.

[0036] The embodiment of the first aspect of the present invention provides a fresh air module for an air conditioner, such as Figures 1 to 5 As shown, the fresh air module includes a fresh air fan 11, a catalytic module 12, a shell 13 and an ozone generating module 14.

[0037] Among them, the fresh air fan 11 has an air intake 15 and an air outlet 16; the catalytic module 12 is arranged at the air intake 15; the shell 13 is connected to the fresh air fan 11, and the shell 13 and the fresh air fan 11 form an air inlet cavity 18 connected to the air intake 15, and the shell 13 is provided with an air inlet 17; the ozone generating module 14 is arranged at the air inlet 17.

[0038] It is understandable that when the fresh air blower 11 is turned on, the indoor polluted air enters from the air inlet 17, and the ozone generated by the ozone generating module 14 drives the indoor polluted air to pass through the catalytic module 12. The ozone is decomposed in the process of passing through the catalytic module 12 to generate active oxygen free radicals. The active oxygen free radicals have strong oxidizing properties and can decompose the volatile organic compounds and harmful inorganic gases in the indoor polluted air into green and harmless CO2 and H2O on the surface of the catalytic module 12; wherein, the volatile organic compounds can be formaldehyde, benzene, toluene, etc., and the harmful inorganic gases can be ammonia, hydrogen sulfide, etc. It should be noted here that the strong oxidizing active substances generated by the decomposition of ozone by the catalytic module 12 can also kill bacteria and viruses in the gas.

[0039] It should be noted that the fresh air component of the existing air conditioner includes a fresh air fan 11 and a housing 13, and the air inlet 17 of the housing 13 is connected to the outdoor fresh air duct; when the fresh air component purifies the indoor air, the outdoor air enters through the fresh air duct, and the purified air is output from the air outlet 16 after adsorption. However, this embodiment can use the fresh air component of the existing air conditioner, remove the fresh air duct connected to the outside, install the ozone generating module 14 at the air inlet 17, and install the catalytic module 12 on the air inlet side of the fresh air fan 11; in this way, the fresh air module of this embodiment can use the existing fresh air component structure, without the need for remodeling and manufacturing, reducing the cost and time investment; and the fresh air module of this embodiment can be directly adapted to the existing air conditioner structure, avoiding complex transformation projects and reducing installation costs.

[0040] The fresh air module for the air conditioner provided in the embodiment of the present invention is provided with a catalytic module 12 through the air inlet 15 of the fresh air fan 11, and an ozone generating module 14 is provided at the air inlet 17. Indoor polluted air enters from the air inlet 17 and enters the catalytic module 12 together with the ozone generated by the ozone generating module 14. The ozone is decomposed to produce active oxygen free radicals during the process of passing through the catalytic module 12, which can decompose the volatile organic matter and harmful inorganic gases in the indoor polluted air into green and harmless CO2 and H2O, and transport them to the room through the air outlet 16 to purify the indoor air. There is no need to replace the catalytic material, and the operating cost is low.

[0041] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the shell 13 is arranged on the air intake side of the fresh air fan 11 , and the catalytic module 12 is located in the air inlet cavity 18 and is arranged at the air intake 15 of the fresh air fan 11 .

[0042] It can be understood that, along the air flow direction, the catalytic module 12 is located on the rear side of the ozone generating module 14, and the fresh air fan is located on the rear side of the catalytic module 12, so that the indoor polluted air passes through the air inlet 17 and the ozone generating module 14, and then enters the fresh air fan 11 after being completely decomposed on the surface of the catalytic module 12, so as to enhance the air purification effect.

[0043] It should be noted that the indoor polluted air first passes through the ozone generating module 14 so that the indoor polluted air is evenly mixed with the ozone, and in the process of passing through the catalytic module 12, the ozone decomposes to produce active oxygen free radicals that can evenly decompose the indoor polluted air; in this way, using ozone synergistic catalytic technology, the volatile organic compounds and harmful inorganic gases in the polluted air can be completely decomposed and sterilized, the reaction efficiency is fast, and the user experience can be improved.

[0044] Furthermore, the catalytic module 12 is disposed on the outer wall of the fresh air fan 11 and is located at the air inlet 15 , and the shell 13 is detachably connected to the air inlet 15 of the fresh air fan 11 .

[0045] It can be understood that the catalyst of the ozone catalytic oxidation catalytic module 12 produced by the ozone generating module 14 will not be consumed during the reaction process, and there is no need to replace materials, the operating cost is low, and the long-term effect is stable; even if the catalytic module 12 needs to be replaced or maintained, the shell 13 and the fresh air fan 11 can be detachably connected, and the shell 13 is easy to disassemble, which facilitates the replacement and maintenance of the catalytic module 12.

[0046] In some embodiments of the present invention, ozone (O3) can be used for disinfection, deodorization and air purification at a certain concentration, but when the content is too high, it will cause multiple negative effects on human health, the environment and materials. Therefore, this embodiment provides an ozone measuring element at the air outlet 16 to monitor the ozone content of the air at the air outlet 16.

[0047] Among them, the ozone measuring element can use an electrochemical sensor to detect ozone through chemical reactions on electrodes; when ozone molecules come into contact with the electrodes, an oxidation-reduction reaction occurs to generate current, and the ozone concentration is determined by measuring the change in current; of course, the ozone measuring element can also use other measuring instruments such as ultraviolet absorption spectrometers and metal oxide semiconductor sensors.

[0048] Specifically, the ozone measuring element measures the amount of ozone at the air outlet 16. When the amount of ozone is greater than the ozone threshold, the amount of ozone generated by the ozone generating module 14 can be reduced, and the rotation speed of the fresh air fan 11 can also be reduced to achieve the optimal catalytic removal of VOC (volatile organic compounds) effect and ensure that the amount of ozone in the air output from the air outlet 16 does not exceed the standard.

[0049] In some embodiments of the present invention, the ratio of the air volume of the fresh air fan 11 to the cross-sectional area of ​​the catalytic module 12 is a first ratio, and the first ratio is less than or equal to a first preset value.

[0050] For example, the catalytic module is a cube, the length, width and thickness of the catalytic module are respectively recorded as L, W and H, the air volume of the fresh air fan is Q, and the ratio of the air volume of the fresh air fan to the cross-sectional area of ​​the catalytic module is recorded as the first ratio K1, then , represents the current reaction flow rate; where, , K1 is less than or equal to the first preset value, the first preset value is the flow rate threshold, and the flow rate threshold is the gas flow rate of the airflow when the ozone amount at the air outlet is equal to the ozone threshold. It should be noted here that Represents the cross-sectional area of ​​the catalytic module, which is calculated according to the structural shape. For example, when the catalytic module is a cylinder, S=πr 2 , r represents the radius of the catalytic module.

[0051] It can be understood that the smaller K1 is, the slower the airflow passes through the catalytic module, and the longer the reaction time between ozone and the catalyst in the catalytic module is, which helps to achieve the optimal catalytic removal of VOCs and ensure that the output ozone amount does not exceed the standard.

[0052] Furthermore, the ratio of the catalyst module thickness to the first ratio is recorded as the second ratio K2. , Represents the residence time of ozone in the catalytic module, then K2 is greater than or equal to a second preset value, the second preset value is a time threshold, and the time threshold is the time for the airflow to pass through the catalytic module when the ozone amount at the air outlet is equal to the ozone threshold.

[0053] It can be understood that the larger the K2 is, the longer the airflow passes through the catalytic module, and the longer the reaction time between ozone and the catalyst in the catalytic module is, which helps to achieve the optimal catalytic removal of VOCs and ensure that the output ozone amount does not exceed the standard.

[0054] In a specific embodiment of the present invention, the flow rate threshold is 1-3 m / s, and the time threshold is 0.01-0.05 s; preferably, the flow rate threshold is 2 m / s, and the time threshold is 0.02 s.

[0055] For example, the air volume of the fresh air fan is 70m 3 / h, air volume unit is m 3 / s or m 3 / h,m 3 / h to m 3 The conversion formula for / s is: ,in, Indicates air volume, unit is m 3 / s; Indicates air volume, unit is m 3 / h; the size of the catalytic module is 12*16cm, and the thickness of the catalytic module is 4cm.

[0056] m / s, then the current reaction flow rate is about 1m / s; Obviously, a reaction velocity of ≤2 m / s and a residence time of ≥0.02 s can help to achieve the best catalytic VOC removal effect and ensure that ozone leakage does not exceed the standard.

[0057] The ozone generator produces 30mg / h of ozone, and the ozone volume at the air outlet is less than 0.10mg / m 3 , the accumulated ozone concentration in the space is less than 0.16mg / m 3 ; Among them, 0.10mg / m 3 The ozone threshold is the cumulative ozone concentration in the space < 0.16 mg / m 3, ensure that the ozone concentration in indoor air is within a safe range and avoid the health effects caused by long-term exposure to high concentration ozone environment.

[0058] In some embodiments of the present invention, the ozone generating module 14 is used to generate ozone for sterilization, disinfection and odor removal; the ozone generating module 14 includes an ozone generator, which can be a corona discharge ozone generator, an ultraviolet ozone generator, an electrolytic ozone generator, etc.

[0059] In some embodiments of the present invention, the catalytic module 12 includes a catalytic filter, which is the core part of the catalytic module 12 and is responsible for the occurrence of the catalytic reaction. The catalytic filter includes a substrate and a catalyst. The substrate is usually made of porous materials, such as honeycomb ceramics, foam metal, glass fiber, etc. These materials have a high specific surface area and can provide more catalytic active sites; the catalyst is an active substance coated on the surface of the substrate, and the catalyst can be a metal oxide, such as manganese, cobalt, nickel or iron.

[0060] It can be understood that at room temperature, the ozone produced by the ozone generator is mixed evenly with the intake air and then passes through the catalytic filter. The ozone is decomposed by the catalyst to produce active oxygen free radicals. The active oxygen free radicals have strong oxidizing properties and can decompose volatile organic matter and harmful inorganic gases on the catalyst surface into green and harmless CO2 and H2O, and kill bacteria and viruses.

[0061] It should be noted that the housing 13 is detachably connected to the fresh air blower 11, which is convenient for loading the catalytic material, which is a porous material with low wind resistance. The pollutant molecules and ozone in the intake air are oxidized and removed by the catalytic material, and the purified air is discharged to the indoor environment through the air outlet 16.

[0062] In a preferred embodiment of the present invention, Figure 4 As shown, the fresh air module also includes a control component 19 arranged at the air inlet 17, and the control component 19 is located on the side of the ozone generating module 14 away from the air inlet cavity, and the control component 19 is suitable for switching between a first state and a second state. In the first state, the air inlet 17 is open; in the second state, the air inlet 17 is closed.

[0063] It is understandable that the ozone synergistic catalytic technology combining the catalytic module 12 and the ozone generating module 14 can completely decompose volatile organic compounds and harmful inorganic gases and sterilize and disinfect, and the reaction efficiency is fast. However, after long-term use of the catalytic module 12, the active sites on the surface are easily covered by moisture in the air, volatile organic compounds that are difficult to degrade, and intermediate products, resulting in reduced catalyst activity, and the catalyst that has lost some of its activity needs to be activated and regenerated. Therefore, in this embodiment, a control member 19 is provided at the air inlet 17, and the control member 19 has a first state and a second state; when the control member 19 is in the first state, the air inlet 17 is open; when the control member 19 is in the second state, the air inlet 17 is closed, and the regeneration of the catalytic module 12 is achieved by switching between the first state and the second state by the control member 19, and in combination with the fresh air blower 11 and the ozone generating module 14.

[0064] Specifically, when the catalytic module 12 needs to be regenerated, the control component 19 is in the second state to close the air inlet 17, turn on the ozone generating module 14, and turn off the fresh air fan 11; and after running for a certain period of time, the accumulated amount of ozone in the air inlet chamber 18 can fully react with the substances accumulated on the surface of the catalytic module 12, and the fresh air fan 11 is turned on, so that high-concentration ozone reacts in the catalytic module 12, and a large number of active oxygen free radicals are generated on the surface of the catalytic module 12, which oxidatively decompose various substances on the surface of the catalyst, thereby ensuring that the active sites on the surface of the catalytic module 12 are not covered and the activity is improved.

[0065] It should be noted that commonly used catalyst regeneration methods include high temperature activation, hydrogen peroxide cleaning, etc. These methods require the catalyst module 12 to be taken out and placed in a specific device for activation, and in situ regeneration cannot be achieved, resulting in a cumbersome regeneration process and the user cannot complete it at home. However, in this embodiment, the catalyst module 12 does not need to be taken out, and the catalyst module 12 can be regenerated by controlling the control component 19, the fresh air fan 11, and the ozone generating module 14. The user can operate it at home, and the operation process is simple.

[0066] Optionally, the control component 19 is a wind valve disposed at the air inlet 17 , and a driving motor connected to the wind valve is disposed on the shell 13 , and the wind valve is driven by the driving motor to realize the opening and closing of the air inlet 17 .

[0067] The embodiment of the second aspect of the present invention provides an air conditioner, such as Figure 6 As shown, the air conditioner includes a shell 20 and a fresh air module 10 provided in any of the above embodiments. The fresh air module 10 is arranged in the shell 20. The shell 20 is provided with a first air outlet 21 connected to the air inlet 17 and a second air outlet 22 connected to the air outlet 16.

[0068] It can be understood that the indoor polluted air enters the fresh air module 10 through the first air outlet 21, and is discharged from the second air outlet 22 to the indoor environment after being purified by the fresh air module 10, so as to purify the indoor air.

[0069] It should be noted that the air conditioner includes an indoor unit and an outdoor unit. The indoor unit has a fan installation position. The fresh air module is arranged at the fan installation position of the indoor unit. The fresh air module can be directly adapted to the existing air conditioning structure, avoiding complicated renovation projects and reducing costs.

[0070] Optionally, a heat exchanger (not shown) is provided in the housing 20, and the heat exchanger is connected to the air outlet 16 and the second air outlet 22 respectively. The purified air discharged from the air outlet 16 is discharged from the second air outlet 22 to the indoor environment after heat exchange by the heat exchanger.

[0071] Based on the fresh air module provided in any of the above embodiments, an embodiment of the present invention further provides a control method for the fresh air module, such as Figure 7 As shown, the control method includes the following steps: Step 100: Receive a purification instruction.

[0072] It can be understood that the purification instruction sent by the control module is received; for example, when the control module detects that the concentration of polluted gas in the indoor air is greater than the concentration threshold, the purification instruction is sent to the fresh air module; of course, the user can also input a purification signal to the control module through the air conditioner remote control or the button on the touch screen, and the control module sends a purification instruction to the fresh air module according to the purification signal. It should be noted that the air conditioner indoor unit includes a fresh air module and a control module.

[0073] Step 200: Based on the purification instruction, control the fresh air module to enter the purification mode; in the purification mode, turn on the fresh air fan and the ozone generating module.

[0074] It can be understood that when it is detected that the concentration of polluted gas in the indoor air is greater than the concentration threshold, the fresh air module receives the purification instruction and is in the purification mode corresponding to the purification instruction. In the purification mode, the fresh air module turns on the fresh air fan and the ozone generation module, and the indoor polluted air enters from the air inlet. The ozone generated by the ozone generation module drives the indoor polluted air to pass through the catalytic module. The ozone is decomposed in the process of passing through the catalytic module to produce active oxygen free radicals. The active oxygen free radicals have strong oxidizing properties and can decompose volatile organic compounds and harmful inorganic gases in the indoor polluted air into green and harmless CO2 and H2O on the surface of the catalytic module, and transport them to the room through the air outlet to achieve indoor air purification.

[0075] Furthermore, in the purification mode, the time that the airflow passes through the catalytic module is greater than or equal to the time threshold. The longer the airflow passes through the catalytic module, the longer the reaction time between ozone and the catalyst in the catalytic module, which helps to achieve the optimal catalytic removal of VOCs and ensure that the output ozone amount does not exceed the standard.

[0076] Optionally, when a control component is provided at the air inlet, the fresh air module is in the purification mode and the control component is in the first state, then step 200 specifically includes: based on the purification instruction, controlling the fresh air module to enter the purification mode; in the purification mode, turning on the fresh air fan and the ozone generating module, and putting the control component in the first state.

[0077] In one embodiment of the present invention, Figure 8 As shown, after executing step 200, the control method further includes the following steps: Step 300: When the purification mode runs continuously for a first preset time and the concentration of the polluted gas is greater than the concentration threshold and / or the catalytic activity of the catalytic module is less than the activity threshold, control the fresh air module to enter the ozone accumulation mode; in the ozone accumulation mode, turn on the ozone generating module, turn off the fresh air fan, and put the control component in the second state.

[0078] Step 400: When the ozone accumulation mode continues to run for a second preset time, the fresh air module is controlled to enter the catalyst regeneration mode; in the catalyst regeneration mode, the fresh air fan is turned on.

[0079] It is understandable that the catalytic module can completely decompose volatile organic compounds, but there are still some long-chain gases and difficult-to-degrade organic compounds in the air. After the fresh air module has been running for a certain period of time, these organic compounds will be deposited on the surface of the catalyst, covering the active sites on its surface, resulting in reduced catalyst activity, thereby affecting the air purification effect. Based on this, this embodiment detects the concentration of polluted gases in the indoor air after the purification mode has been running for a first preset time. When the concentration of polluted gases is greater than the concentration threshold, it indicates that the catalyst activity is reduced and the catalytic module needs to be regenerated; it can also be that the catalytic activity of the catalytic module is detected. When the catalytic activity of the catalytic module is less than the activity threshold, it indicates that the catalyst activity is reduced and the catalytic module needs to be regenerated. Thereby, the fresh air module is controlled to enter the ozone accumulation mode first. In the ozone accumulation mode, the ozone generating module is turned on, the fresh air fan is turned off, and the control component is put into the second state. After running for a certain period of time, a large amount of ozone is accumulated in the air inlet chamber, and the fresh air module enters the catalyst regeneration mode again. In the catalyst regeneration mode, the fresh air fan is turned on, and the accumulated amount of ozone in the air inlet chamber can fully react with the substances accumulated on the surface of the catalytic module, so that high-concentration ozone reacts in the catalytic module and generates a large amount of active oxygen free radicals on the surface of the catalytic module, which oxidatively decompose various substances on the surface of the catalyst, thereby ensuring that the active sites on the surface of the catalytic module are not covered and the activity is improved.

[0080] In a specific embodiment of the present invention, the control method comprises the following steps: Step 100: Receive a purification instruction.

[0081] Among them, the concentration of polluted gases in indoor air is detected by VOCs detector, and the concentration threshold is 0.6mg / m 3 When the VOCs detector detects that the concentration of polluted gas in indoor air is greater than 0.6mg / m 3 When the air is cleaned, the control module sends a purification instruction to the fresh air module.

[0082] Step 200: Based on the purification instruction, control the fresh air module to enter the purification mode; in the purification mode, turn on the fresh air fan and the ozone generating module.

[0083] It is understandable that based on the purification instruction, the fresh air module turns on the purification mode.

[0084] Step 300: When the purification mode continues to run for a first preset time and the concentration of the polluted gas is greater than the concentration threshold, control the fresh air module to enter the ozone accumulation mode; in the ozone accumulation mode, turn on the ozone generating module, turn off the fresh air fan, and put the control component in the second state.

[0085] When the purification module is turned on and continues to run for the first preset time, the VOCs detector detects that the concentration of polluted gases in the indoor air is still greater than 0.6 mg / m 3 When the fresh air module is controlled to start the regeneration mode, the regeneration module includes the ozone accumulation mode and the catalyst regeneration mode.

[0086] For example, the purification mode is continuously operated for 20 minutes and the VOCs detector detects that the concentration of polluted gases in the indoor air is still greater than 0.6 mg / m 3 In this case, the fresh air module is controlled to enter the ozone accumulation mode first, the ozone generator is turned on and lasts for 5 minutes, and the accumulated ozone inside the air inlet cavity is tested. This accumulated amount can fully react with the substances accumulated on the surface of the catalytic module. It should be noted here that the amount of ozone generated by the ozone generator is determined according to the indoor VOCs concentration, and it should be ensured that the accumulated amount of ozone in the air inlet cavity can fully react with the substances accumulated on the surface of the catalytic module. According to the approximate stoichiometric ratio of the reaction of ozone and volatile organic compounds, and the spatial size of the catalytic module, when the indoor VOCs concentration is detected to be x mg / m 3 When , the ozone generator produces y mg / h, and the running time of the ozone generator should be (x*5*60) / y minutes.

[0087] Step 400: When the ozone accumulation mode continues to run for a second preset time, the fresh air module is controlled to enter the catalyst regeneration mode; in the catalyst regeneration mode, the fresh air fan is turned on.

[0088] It can be understood that after the ozone accumulation mode has been running continuously for 5 minutes, the fresh air module is controlled to enter the catalyst regeneration mode, and the fresh air fan is turned on, so that the high concentration of ozone reacts in the catalytic module and generates a large number of active oxygen free radicals on the surface of the catalytic module, which oxidize and decompose various substances on the surface of the catalyst, thereby re-exposing the active sites on the catalyst surface of the catalytic module, restoring the activity of the catalytic module and improving the activity of the catalytic module.

[0089] For example, after the catalyst regeneration mode runs for a period of time, such as 25 minutes, it is ensured that the generated ozone is completely reacted and removed inside the catalytic module, and then the control component is switched from the second state to the first state, and the fresh air blower is controlled to enter the purification mode again, that is, return to step 200, thereby realizing the cycle of indoor air purification and catalytic regeneration of the catalytic module.

[0090] Furthermore, when the fresh air module is in the purification mode, the speed of the fresh air fan is a first speed, and when the fresh air module is in the catalyst regeneration mode, the speed of the fresh air fan is a second speed, which is lower than the first speed; the second speed can be the lowest speed of the fresh air fan to reduce the speed of ozone passing through the catalytic module, thereby improving the decomposition effect of various substances on the surface of the catalytic module.

[0091] Optionally, when the fresh air module is in ozone accumulation mode, after the ozone generator runs at maximum power for a certain period of time, the fresh air fan is turned on and runs at minimum speed, so that high-concentration ozone reacts in the catalytic module and generates a large number of active oxygen free radicals on the surface of the catalytic module, which oxidatively decompose various substances on the surface of the catalyst, thereby ensuring that the active sites on the catalyst surface are not covered and the activity is improved.

[0092] In one embodiment of the present invention, Fig. 9 As shown, after executing step 200, the control method further includes the following steps: Step 500: Obtain the amount of ozone at the air outlet.

[0093] Step 600: When the amount of ozone is greater than the ozone threshold, reduce the amount of ozone generated by the ozone generating module and / or reduce the rotation speed of the fresh air fan.

[0094] It can be understood that the ozone measuring element measures the amount of ozone at the air outlet. When the ozone amount is greater than the ozone threshold, the ozone production of the ozone generating module can be reduced, and the speed of the fresh air fan can also be reduced to achieve the best catalytic removal of VOC (volatile organic compounds) effect and ensure that the ozone amount in the air output from the outlet does not exceed the standard.

[0095] The control device of the fresh air module provided by the present invention is described below. The control device of the fresh air module described below and the control method of the fresh air module described above can correspond to each other.

[0096] An embodiment of the present invention provides a control device for a fresh air module, such as Fig.10 As shown, the control device includes a receiving module 1001 and a first control module 1002; wherein: The receiving module 1001 is used to receive a purification instruction.

[0097] The first control module 1002 is used to control the fresh air module to enter the purification mode based on the purification instruction; in the purification mode, the fresh air blower and the ozone generating module are turned on.

[0098] Furthermore, when a control component is provided at the air inlet, the first control module is used to control the fresh air module to enter a purification mode based on a purification instruction; in the purification mode, the fresh air fan and the ozone generating module are turned on, and the control component is placed in a first state.

[0099] In one embodiment of the present invention, the control device further includes a second control module and a third control module; wherein: The second control module is used to control the fresh air module to enter the ozone accumulation mode when the purification mode continues to run for a first preset time and the concentration of the polluted gas is greater than the concentration threshold; in the ozone accumulation mode, the ozone generating module is turned on, the fresh air fan is turned off, and the control component is in the second state.

[0100] The third control module is used to control the fresh air module to enter the catalyst regeneration mode when the ozone accumulation mode continues to run for a second preset time; in the catalyst regeneration mode, the fresh air fan is turned on.

[0101] In one embodiment of the present invention, the control device further includes an acquisition module and a reduction module; wherein: An acquisition module, used to obtain the amount of ozone at the air outlet; The reduction module is used to reduce the amount of ozone generated by the ozone generating module and / or reduce the rotation speed of the fresh air fan when the amount of ozone is greater than the ozone threshold.

[0102] Fig.11 An example of a physical structure diagram of an electronic device is shown in FIG. Fig.11As shown, the electronic device may include: a processor 1110, a communication interface 1120, a memory 1130 and a communication bus 1140, wherein the processor 1110, the communication interface 1120 and the memory 1130 communicate with each other through the communication bus 1140. The processor 1110 may call the logic instructions in the memory 1130 to execute the control method of the fresh air module, the method comprising: receiving a purification instruction; based on the purification instruction, controlling the fresh air module to enter a purification mode; in the purification mode, turning on the fresh air fan and the ozone generating module.

[0103] In addition, the logic instructions in the above-mentioned memory 1130 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0104] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the fresh air module provided by the above methods, and the method includes: receiving a purification instruction; based on the purification instruction, controlling the fresh air module to enter a purification mode; in the purification mode, turning on the fresh air fan and the ozone generating module.

[0105] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the control method of the fresh air module provided by the above-mentioned methods, and the method includes: receiving a purification instruction; based on the purification instruction, controlling the fresh air module to enter a purification mode; in the purification mode, turning on the fresh air fan and the ozone generating module.

[0106] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0107] Through the description of the above implementation modes, those skilled in the art can clearly understand that each implementation mode can be implemented by means of software plus a necessary general hardware platform, or of course by hardware. Based on such an understanding, the above technical solution can essentially or in other words be embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fresh air module for an air conditioner, characterized in that: include: A fresh air fan, wherein the fresh air fan has an air intake and an air outlet; A catalytic module, arranged at the air intake port; A housing connected to the fresh air fan, wherein an air inlet cavity connected to the air inlet is formed between the housing and the fresh air fan, and the housing is provided with an air inlet; The ozone generating module is arranged at the air inlet.

2. The fresh air module for an air conditioner according to claim 1, characterized in that: The catalytic module is located in the air inlet cavity.

3. The fresh air module for an air conditioner according to claim 1, characterized in that: The shell and the fresh air blower are detachably connected.

4. The fresh air module for an air conditioner according to claim 1, characterized in that: The air outlet is provided with an ozone measuring element.

5. The fresh air module for an air conditioner according to any one of claims 1 to 4, characterized in that: A ratio of the air volume of the fresh air fan to the cross-sectional area of ​​the catalytic module is a first ratio, and the first ratio is less than or equal to a first preset value.

6. The fresh air module for an air conditioner according to claim 5, characterized in that: A ratio of the catalytic module thickness to the first ratio is a second ratio, and the second ratio is greater than a second preset value.

7. The fresh air module for an air conditioner according to any one of claims 1 to 4, characterized in that: The ozone generating module comprises an ozone generator, and / or, The catalytic module includes a catalytic filter.

8. An air conditioner, characterized in that: It comprises a shell and a fresh air module for an air conditioner as described in any one of claims 1 to 7 arranged in the shell, and the shell is provided with a first air outlet connected to the air inlet and a second air outlet connected to the air outlet.

9. A control method for a fresh air module of an air conditioner according to any one of claims 1 to 7, characterized in that: include: receiving purification instructions; Based on the purification instruction, the fresh air module is controlled to enter the purification mode; in the purification mode, the fresh air fan and the ozone generating module are turned on to allow the indoor polluted air to mix with the ozone generated by the ozone generating module through the air inlet, and the purified air after oxidation and decomposition by the catalytic module is discharged from the air outlet.

10. The control method for the fresh air module of the air conditioner according to claim 9, characterized in that: After starting the fresh air blower and the ozone generating module based on the purification instruction, the method further includes: Obtaining the amount of ozone at the air outlet; When the amount of ozone is greater than the ozone threshold, the amount of ozone generated by the ozone generating module is reduced and / or the rotation speed of the fresh air fan is reduced.

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