A method of sterilizing a range hood

Abstract

The application discloses a sterilization method of a smoke machine, which comprises the following steps: S1, calculating accumulated oil fume production N; when N reaches a set threshold N max , entering step S2: starting a sterilization program: S21, closing a wind collecting cavity; S22, starting an ozone generating unit; S23, starting a fan at a low speed; S24, detecting the ozone concentration in the wind collecting cavity in real time; S25, closing the ozone generating unit; S26, closing the fan; S3, ending the sterilization work; compared with the prior art, the sterilization method of the smoke machine can maintain the ozone concentration at different concentrations in different stages during the whole sterilization process, and the ozone concentration maintained in a previous sterilization stage is greater than that in a subsequent sterilization stage; when the oil fume concentration in the wind collecting cavity is relatively large, high-concentration ozone is used for rapid sterilization and killing; when the oil fume concentration in the wind collecting cavity becomes small, the ozone concentration is reduced, and the overall ozone demand is reduced while the sterilization effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular, to a sterilization method of range hood. BACKGROUND

[0002] After long-term use, the oil-water mixture will accumulate in the range hood. The existing range hood can clean the oil-water mixture in the range hood, but it cannot be completely cleaned. The long-term accumulation of oil-water mixture will breed a large number of harmful bacteria, which will harm human health. The existing range hood uses ultraviolet rays for sterilization and disinfection, but the ultraviolet sterilization and disinfection has the following problems: 1. The ultraviolet sterilization and disinfection is easy to have sterilization dead angle, which leads to incomplete sterilization; 2. The ultraviolet lamp installed in the range hood is easy to be polluted and adsorbed by oil fume, which affects the light emitting effect of the ultraviolet lamp and thus affects the sterilization and disinfection effect; 3. When using ultraviolet sterilization, the power of the ultraviolet lamp is relatively high, and the ultraviolet sterilization and disinfection requires a long action time, which leads to high energy consumption of the ultraviolet sterilization and disinfection; 4. The humidity in the range hood is generally high, which directly reduces the effect of ultraviolet sterilization and disinfection in a high humidity environment. SUMMARY

[0003] The present application aims to provide a sterilization method of range hood, which is used to solve the above technical problems.

[0004] A sterilization method of range hood, the range hood comprising a range hood body, a fan and an ozone generating unit, the range hood body having a wind collecting cavity, the wind collecting cavity having an open state and a closed state, the fan being arranged in the wind collecting cavity, the ozone generating unit being arranged in the range hood body, the ozone generating unit being selectively communicated with or isolated from the wind collecting cavity, the sterilization method further comprising a control module, the control module being used to control the state of the wind collecting cavity and the working state of the ozone generating unit, the sterilization method comprising the following steps:

[0005] S1: calculating the accumulated oil fume production N;

[0006] When N reaches a set threshold N max , step S2 of starting the sterilization program is entered:

[0007] S21: closing the wind collecting cavity;

[0008] S22: starting the ozone generating unit, the ozone generating unit being communicated with the wind collecting cavity and delivering ozone into the wind collecting cavity;

[0009] S23: starting the fan at low speed, the fan being operated at low speed and stirring the ozone entering the wind collecting cavity evenly;

[0010] S24: detecting the ozone concentration in the wind collecting cavity in real time, A being divided into m time periods within the sterilization time A, each time period being recorded as A1, A2...A n ...Am In A1, A3...A n-1 ...A n+1 ...A m Inside, the ozone generating unit is controlled to raise the ozone concentration in the air collection chamber to C1 during the initial A1 time period, maintain the ozone concentration at C1 during the A2 time period, and then decrease the ozone concentration from C1 to C2 during the A3 time period, and so on. n-1 During the period, the ozone concentration remained at C （n-1） / 2 In A n During the time period, the ozone concentration decreased from C （n-1） / 2 Reduce to C （n+1） / 2 In A n+1 During the period, the ozone concentration remained at C （n+1） / 2 ,30min≤A≤120min,30mg / m 3 ≥C1≥C2≥...C n ...≥C m / 2 ≥5mg / m 3 , 2 < n < m, m > 3, and n is odd and m is even;

[0011] S25: Turn off the ozone generator unit and isolate the ozone generator unit from the air collection chamber;

[0012] S26: Turn off the fan;

[0013] S3: End the disinfection process.

[0014] According to one embodiment of the present invention, the volume of the air collection chamber is L, the target ozone concentration C, and the ozone half-life t at a specific temperature and humidity are stored in the control module; the method for controlling the ozone generating unit is as follows:

[0015] Detect the temperature T and humidity H inside the air collection chamber;

[0016] The control module queries the ozone half-life t based on temperature T and humidity H;

[0017] Based on the ozone half-life t and the ozone generating unit operating time T i The amount of ozone produced inside S i Calculation time T i Internal ozone gas attenuation λ i :

[0018] λ i = ;

[0019] Then in A n+1 During the period, the ozone concentration remained at C （n+1） / 2 The amount of ozone that the ozone generating unit needs to produce is S:

[0020] S = λ1 + λ2 +... λ a +... λ i = T1 + T2 +... T a +... + T i = A n+1 .

[0021] According to an embodiment of the present application, the air collecting cavity has an air inlet and an air outlet; in step S21, closing the air collecting cavity comprises the following steps:

[0022] S211: closing the air inlet and detecting the state of the air inlet;

[0023] S212: closing the air outlet and detecting the state of the air outlet;

[0024] When the air inlet is in the closed state and the air outlet is in the closed state, the control module judges that the air collecting cavity is in the closed state, and enters step S22.

[0025] According to an embodiment of the present application, if step S211 detects that the air inlet is in the open state or / and step S212 detects that the air outlet is in the open state, it returns to step S211 or / and step S212, waits for a time T1, and then returns to step S211 or / and step S212 again. If step S211 detects that the air inlet is still in the open state or / and step S212 detects that the air outlet is still in the open state, it issues a warning, reminds the user, and enters step S3.

[0026] According to an embodiment of the present application, if in step S24, after the time period A1 ends, the ozone concentration cannot be raised to C1 all the time, a warning is issued, the user is reminded, and step S25 is entered.

[0027] According to an embodiment of the present application, before entering step S2, it further comprises step S0: self-cleaning of the range hood:

[0028] S01: opening the air collecting cavity;

[0029] S02: starting the fan at the maximum air volume gear; the fan runs at the maximum air volume gear for a time T2.

[0030] According to an embodiment of the present application, the air collecting cavity has an air inlet and an air outlet; in step S01, opening the air collecting cavity comprises the following steps:

[0031] S011: opening the air inlet and detecting the state of the air inlet;

[0032] S012: opening the air outlet and detecting the state of the air outlet;

[0033] With both the air inlet and outlet open, the control module determines that the air collection chamber is open and proceeds to step S02.

[0034] According to one embodiment of the present invention, if step S011 detects that the air inlet is closed or / and step S012 detects that the air outlet is closed, the process returns to step S011 or / and step S012, waits for a time T1, and then returns to step S011 or / and step S012 again. If step S011 detects that the air inlet is still closed or / and step S012 detects that the air outlet is still closed, an early warning is issued to remind the user, and the process proceeds to step S3.

[0035] According to one embodiment of the present invention, in step S1, calculating the cumulative amount of oil fume generated N includes the following steps:

[0036] S11: Record the cooking time D for each user's cooking session, and divide D into... △ D1、 △ D2... △ D f A time period;

[0037] S12: Detection and △ D1、 △ D2... △ D f The corresponding oil fume concentrations B1, B2...B for the time periods f ;

[0038] S13: Records and △ D1、 △ D2... △ D f The corresponding exhaust air volume of the range hood for each time period is Q1, Q2...Q f ;

[0039] S14: The amount of oil fumes N1 generated during each cooking process can be calculated.

[0040] N1 = Q1 B1 △ D1+ Q2 B2 △ D2+ ...Q f B f △ D f = ;

[0041] S15: Accumulate the amount of oil fumes N1 generated during each cooking session and calculate the total actual amount of oil fumes N generated.

[0042] According to an embodiment of the present application, between step S25 and step S26, there is further included step S27: opening the air collecting cavity, and when the ozone concentration C in the air collecting cavity is reduced to 0.1 ppm, entering step S26; or, after step S26, there is further included step S28: keeping the air collecting cavity in a closed state until the ozone concentration C in the air collecting cavity is reduced to 0.1 ppm, and then entering step S3.

[0043] Compared with the prior art, the sterilization method of the range hood of the present application has the following advantages:

[0044] 1. In the sterilization method of the range hood of the present application, when the air collecting cavity of the range hood is sterilized, the air inlet is closed, the air collecting cavity forms a relatively closed space, the ozone generator control unit controls the ozone generator to generate ozone gas, the fan runs at a low speed to disturb the air, the ozone is uniformly distributed in the air collecting cavity, the ozone sensor detection unit detects the ozone concentration in the air collecting cavity in real time, the ozone concentration in the air collecting cavity is maintained within a certain range, and a certain time is maintained, so as to achieve the effect of ozone sterilization and disinfection.

[0045] 2. In the sterilization method of the range hood of the present application, a certain amount of ozone gas is generated in the closed air collecting cavity, the ozone is fully diffused in the air collecting cavity, the oxidation property of the ozone gas is used to kill bacteria, viruses and other microorganisms, and quickly decompose odor and other odor organic or inorganic substances, so as to achieve the effect of deodorization, without odor, without dead angle and comprehensive sterilization, which overcomes the problem of sterilization dead angle existing in ultraviolet sterilization and disinfection.

[0046] 3. In the sterilization method of the range hood of the present application, after the ozone in the air collecting cavity sterilizes the air collecting cavity, the ozone is automatically decomposed into oxygen after sterilization, without harmful residues, and without secondary pollution. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 FIG. 1 is a structural schematic diagram of a range hood adopting the sterilization method of the range hood of the present application;

[0048] Figure 2 FIG. 2 is a sectional view of the range hood adopting the sterilization method of the range hood of the present application;

[0049] Figure 3 FIG. 3 is a local enlarged view of the communication hole on the main body of the range hood when the communication hole is in a closed state (the shell of the ozone generator unit is hidden);

[0050] Figure 4 FIG. 4 is an enlarged view of A in FIG. 3; Figure 3

[0051] Figure 5 ​A partial enlarged view of a communication hole on a smoke machine body of the smoke machine in an open state when the sterilization method of the smoke machine according to the present application is adopted (a shell of an ozone generation unit is hidden);

[0052] Figure 6 For Figure 5 An enlarged view of B;

[0053] In the figure: 1. Smoke machine body, 11. Front panel, 111. Air inlet, 12. Movable panel, 13. Electric check valve, 2. Fan, 3. Ozone generation unit, 31. Ozone generator, 32. Switch valve assembly, 321. Drive motor, 322. Drive plate, 323. Switch valve plate, 33. Shell.

[0054] The implementation of the functions and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0055] The embodiments of the present application will be described herein below with reference to the drawings. Numerous specific details will be set forth in the following description in order to provide a thorough understanding of the application. However, it will be appreciated by those of ordinary skill in the art that the application can be practiced without these details. In other instances, well-known structures and components are not described in detail in order to avoid obscuring the application. Also, the drawings are in simplified form and not to precise scale for reasons of legibility and understanding.

[0056] It should be noted that all directional references (e.g., upper, lower, left, right, front, rear, etc.) are in relation to the exemplary embodiment of the present application, as illustrated in the drawings, and are made only by way of examples of possible orientations with respect to the application and not limitations thereof.

[0057] In addition, the descriptions such as "first", "second", etc. in the present application are only for the purpose of description, and are not particularly intended to indicate the order or sequence, nor to limit the present application. They are merely used to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0058] In order to further understand the content, characteristics and effects of the present application, the following embodiments are exemplified and described in detail as follows with reference to the accompanying drawings:

[0059] The application discloses a sterilization method of a range hood, and refers to Figures 1 to 4 The range hood comprises a range hood body 1, a fan 2 and an ozone generating unit 3. The range hood body 1 is provided with a wind collecting cavity, the wind collecting cavity has an open state and a closed state, the fan 2 is arranged in the wind collecting cavity, the ozone generating unit 3 is arranged in the range hood body 1, the ozone generating unit 3 is selectively communicated with or isolated from the wind collecting cavity, and the range hood further comprises a control module. The control module is used for controlling the state of the wind collecting cavity and the working state of the ozone generating unit 3. The sterilization method comprises the following steps:

[0060] S1: calculating a cumulative oil fume production N;

[0061] When the N reaches a set threshold N max , the sterilization program is started in step S2:

[0062] S21: closing the wind collecting cavity;

[0063] S22: starting the ozone generating unit 3, the ozone generating unit 3 is communicated with the wind collecting cavity and transports ozone into the wind collecting cavity;

[0064] S23: starting the fan 2 at a low speed, the fan 2 is operated at a low speed and stirs the ozone entering the wind collecting cavity uniformly;

[0065] S24: detecting the ozone concentration in the wind collecting cavity in real time, A is divided into m time periods within a sterilization time A, each time period is recorded as A1, A2...A n ...A m , A3...A n-1 ...A n+1 ...A m , the ozone generating unit 3 is controlled, the ozone concentration in the wind collecting cavity is increased to C1 in the A1 time period when the ozone generating unit 3 starts to work, the ozone concentration is maintained at C1 in the A2 time period, the ozone concentration is decreased from C1 to C2 in the A3 time period, and the like. In the A n-1 time period, the ozone concentration is maintained at C （n-1） / 2 , in the A n time period, the ozone concentration is decreased from C （n-1） / 2 to C （n+1） / 2 , in the A n+1 time period, the ozone concentration is maintained at C （n+1） / 2 , 30min≤A≤120min, 30mg / m 3 ≥C1≥C2≥...C n ...≥C m / 2 ≥5mg / m 3 , 2<n<m, m>3, and n is an odd number and m is an even number;

[0066] S25: Turn off the ozone generating unit 3, and the ozone generating unit 3 is isolated from the air collecting cavity;

[0067] S26: Turn off the fan 2;

[0068] S3: End the sterilization work.

[0069] The sterilization method of the smoke machine according to the present application starts the sterilization program according to the oil fume generation amount, and when the smoke machine works for a period of time, the cumulative oil fume generation amount N of the smoke machine reaches the set threshold N max , the smoke machine reaches the sterilization condition, the state of the air collecting cavity is checked, if the air collecting cavity is in the closed state, the ozone generating unit 3 is communicated with the air collecting cavity and transports ozone into the air collecting cavity, because the density of ozone is greater than that of air, the fan 2 of the smoke machine runs at low speed and stirs the ozone entering the air collecting cavity uniformly, avoiding the ozone generated by the ozone generating unit 3 from easily depositing at the bottom of the air collecting cavity, and the sterilization process of ozone is divided into m stages, in the first stage A1, the ozone generating unit 3 rapidly increases the concentration of ozone in the air collecting cavity to C1, then in the second time period A2, the ozone generating unit 3 continues to release ozone and maintains the ozone concentration at C1, because ozone has a half-life period, in the second time period A2, the ozone generating unit 3 releases ozone to supplement the attenuation of ozone, so that the concentration of ozone in the second time period A2 is maintained at C1, the sterilization stage is started, the oil fume concentration in the air collecting cavity is relatively high, and high-concentration ozone is needed for sterilization, with the extension of the sterilization time, the oil fume concentration in the air collecting cavity gradually decreases, so the ozone concentration is the largest in the second time period A2, after the end of the A2 time period, the ozone generating unit 3 stops generating ozone, in the A3 time period, the ozone attenuates and the concentration begins to decrease, in this process, the ozone continues to sterilize the inside of the air collecting cavity, after the end of the A3 time period, the ozone concentration decreases to C1, in the A4 time period, the ozone generating unit 3 is started, the ozone generating unit 3 releases ozone to supplement the attenuation of ozone, so that the concentration of ozone in the fourth time period A4 is maintained at C2; in this way, in the A n-1 time period, the ozone generating unit 3 is started and releases ozone to supplement the attenuation of ozone, so that the ozone concentration is maintained at C （n-1） / 2 , in the A n time period, the ozone generating unit 3 stops generating ozone, the ozone attenuates, and the concentration decreases from C （n-1） / 2 to C （n+1） / 2 , in the A n+1 time period, the ozone generating unit 3 is started and releases ozone to supplement the attenuation of ozone, so that the ozone concentration is maintained at C （n+1） / 2 , in the A mAfter the time period, the ozone generating unit 3 is closed, and the ozone generating unit 3 is isolated from the air collecting cavity; then the fan 2 is closed, since the ozone generating unit 3 does not release ozone, the ozone in the air collecting cavity will be completely attenuated as time goes on, and the next time the user starts the range hood, the ozone in the air collecting cavity has been completely decomposed, and there is no ozone leakage to the kitchen space.

[0070] The disinfection method of the range hood of the application maintains the ozone concentration at different concentrations in different stages during the whole disinfection process, and the ozone concentration maintained in the previous disinfection stage is greater than that in the subsequent disinfection stage, high-concentration ozone is used to quickly kill when the oil smoke concentration in the air collecting cavity is relatively large, and the ozone concentration is reduced when the oil smoke concentration in the air collecting cavity is small, thereby reducing the overall ozone demand while ensuring the disinfection effect.

[0071] The ozone disinfection method of the application is A n When n is a single time period, the length of A n is determined by the ozone concentration difference between A n-1 and A n+1 , that is, the ozone concentration is reduced from C n to C （n-1） / 2 in A （n+1） / 2 time period, and the falling speed is determined by the decay rate of ozone, and the concentration difference between the two is the decay amount required by ozone in A n time period, and the length of A n is determined by the amount of ozone decay required.

[0072] The disinfection method of the range hood of the application, the ozone generating unit 3 is selectively communicated or isolated with the air collecting cavity, when the range hood is in the smoke extraction mode, the air collecting cavity of the range hood main body 1 is in the open state, the fan 2 is running, the oil smoke generated during cooking enters the air collecting cavity and is discharged by the exhaust fan, in the process of the oil smoke entering the air collecting cavity, the ozone generating unit 3 is in the state of being isolated from the air collecting cavity, the oil smoke in the air collecting cavity will not pollute the ozone generating unit 3, and will not affect the ozone release amount of the ozone generating unit 3; when the air collecting cavity needs to be disinfected, the ozone generating unit 3 is communicated with the air collecting cavity and transports ozone gas into the air collecting cavity, the fan 2 runs at low speed, disturbs the air, and makes the ozone uniformly distributed in the air collecting cavity, the ozone generating unit 3 maintains the ozone concentration in the air collecting cavity within a certain range and for a certain time, thereby achieving the effect of ozone disinfection and sterilization.

[0073] The disinfection method of the range hood of the present application, in order to realize the selective communication or isolation of the ozone generating unit 3 with the air collecting cavity, the ozone generating unit 3 comprises an ozone generator 31, a switch valve assembly 32 and a shell 33, the top of the range hood body 1 is provided with a communication hole in communication with the air collecting cavity, the switch valve assembly 32 is used for opening or closing the communication hole, the shell 33 is arranged on the top of the range hood body 1 and covers the ozone generator 31 and the switch valve assembly 32, when the switch valve assembly 32 opens the communication hole, the inside of the shell 33 is in communication with the air collecting cavity. When the range hood is in the smoke extraction mode, the switch valve assembly 32 closes the communication hole at the top of the range hood body 1, so that the inside of the shell 33 is isolated from the air collecting cavity, when the fan 2 operates and the oil fume passes through the air collecting cavity, the oil fume cannot enter the shell 33 through the communication hole, and the ozone generator 31 will not be polluted by the oil fume; when it is needed to disinfect the air collecting cavity, the switch valve assembly 32 opens the communication hole at the top of the range hood body 1, the inside of the shell 33 is in communication with the air collecting cavity, the ozone generator 31 is started and generates ozone, the ozone enters the air collecting cavity through the communication hole and is uniformly distributed in the air collecting cavity under the action of the fan 2, after the ozone in the air collecting cavity reaches a certain concentration and maintains for a period of time, the ozone generator 31 stops generating ozone, and the switch valve assembly 32 closes the communication hole again.

[0074] The disinfection method of the range hood of the present application, when the switch valve assembly 32 opens the communication hole, the projection of the emitting end of the ozone generator 31 falls in the communication hole, and the extension line of the extension direction of the emitting end of the ozone generator 31 passes through the communication hole. Since the density of ozone is greater than the density of air, when the ozone is emitted from the emitting end of the ozone generator 31, the ozone begins to sink. By making the projection of the emitting end of the ozone generator 31 fall in the communication hole and making the extension line of the extension direction of the emitting end of the ozone generator 31 pass through the communication hole, when the ozone is emitted from the emitting end of the ozone generator 31, more ozone can directly enter the air collecting cavity through the communication hole, and the ozone concentration in the air collecting cavity can quickly reach the required concentration.

[0075] The disinfection method of the range hood of the present application, the switch valve assembly 32 comprises a driving motor 321, a driving plate 322 and a switch valve plate 323, the driving plate 322 has a first connection site connected with the output end of the driving motor 321 and a second connection site connected with the switch valve plate 323, the driving motor 321 drives the driving plate 322 to rotate, so that the driving plate 322 drives the switch valve plate 323 to rotate and opens the communication hole. When the range hood enters the disinfection mode, the air collecting cavity is closed, the driving motor 321 is started, the output shaft of the driving motor 321 drives the driving plate 322 to rotate, the driving plate 322 rotates and drives the switch valve plate 323 to rotate, the switch valve plate 323 opens the communication hole, and the ozone generated by the ozone generator 31 can enter the air collecting cavity through the communication hole.

[0076] The switch valve plate 323 is located on the top of the smoke machine body 1 and in the shell 33. When the smoke machine is in the running mode, both ends of the switch valve plate 323 are located at the lowest position, and the switch valve plate 323 is close to the top of the smoke machine body 1 and seals the communication hole. When the driving motor 321 drives the driving plate 322 to drive the switch valve plate 323 to rotate, the switch valve plate 323 starts to rotate upwards, and at the same time, the switch valve plate 323 rises relative to the top of the smoke machine body 1, so that the communication hole is opened, and the ozone generated by the ozone generator 31 can enter the air collecting cavity through the communication hole.

[0077] In the disinfection method of the smoke machine, the length of the line connecting the midpoint of the edge of one end of the switch valve plate close to the second connecting position and the midpoint of the first connecting position is L1, the length of the line connecting the midpoint of the edge of one end of the switch valve plate away from the second connecting position and the midpoint of the first connecting position is L2, L1 < L2, and the communication hole is in the closed state. When the driving motor 321 drives the driving plate 322 to rotate, the one end of the switch valve plate close to the second connecting position rotates with L1 as the radius, and the one end of the switch valve plate away from the second connecting position rotates with L2 as the radius. In this way, when the driving motor 321 drives the driving plate 322 to drive the switch valve plate 323 to rotate, the one end of the switch valve plate close to the second connecting position moves upwards by a distance smaller than the one end of the switch valve plate away from the second connecting position. At the same time, the switch valve plate 323 changes from horizontal to inclined, and the one end of the switch valve plate 323 close to the second connecting position is located below. At the same time of opening the communication hole, the switch valve plate 323 does not interfere with the top plate of the smoke machine body 1.

[0078] Please refer to Figures 3 to 6 In the disinfection method of the smoke machine, the ozone generator 31 is arranged on the upper surface of the switch valve plate 323, and the emission end of the ozone generator 31 extends to the edge of one end of the switch valve plate close to the second connecting position. When the driving motor 321 drives the driving plate 322 to drive the switch valve plate 323 to rotate, the one end of the switch valve plate close to the second connecting position moves upwards by a distance smaller than the one end of the switch valve plate away from the second connecting position. At the same time, the switch valve plate 323 changes from horizontal to inclined, and the one end of the switch valve plate 323 close to the second connecting position is located below. When the ozone generated by the ozone generator 31 sinks, it directly enters the air collecting cavity through the communication hole.

[0079] In the disinfection method of the smoke machine, the volume of the air collecting cavity, the target concentration C of ozone, and the half-life period t of ozone under a specific temperature and humidity are stored in the control module. The method for controlling the ozone generating unit 3 is:

[0080] Detecting the temperature T and humidity H in the air collecting cavity;

[0081] The control module queries the ozone half-life t based on temperature T and humidity H;

[0082] Based on the ozone half-life t and the operating time T of ozone generating unit 3 i The amount of ozone produced inside S i Calculation time T i Internal ozone gas attenuation λ i :

[0083] λ i = ;

[0084] Then in A n+1 During the period, the ozone concentration remained at C （n+1） / 2 The amount of ozone that ozone generating unit 3 needs to produce is S:

[0085] S = λ1 + λ2 + ... + λ a +...λ i = T1+T2+...T a +...+T i =A n+1 .

[0086] Because the rate of ozone decay is not uniform, the amount of ozone decay varies at different times. Therefore, for each time period A that maintains a stable ozone concentration... n+1 Within this time period, divide the time period into i time periods, each of which is T1, T2...T a ...T i T1+T2+...T a +...+T i =A n+1 At temperature T and humidity H, the control module queries the ozone half-life t, and calculates the ozone amount S1 generated within the operating time T1 of ozone generating unit 3 based on the ozone half-life t and the ozone amount S1 generated within the operating time T1 of ozone generating unit 3.

[0087] Ozone gas decay amount λ1 within time T1, λ1= ;

[0088] Ozone gas decay amount λ2 within time T2, λ2= ; ...

[0089] Time T a Internal ozone gas attenuation λ a , λ a = ; ...

[0090] Time T iOzone gas decay amount λ i , λ i = ;

[0091] In the A n+1 time period, the ozone concentration is maintained at C n The required amount of ozone is L C n ;

[0092] The total amount of ozone decay is: λ1+λ2+...λ a +...λ i ;

[0093] Therefore, in the A n+1 time period, the ozone concentration is maintained at C （n+1） / 2 , and the ozone generation unit 3 needs to generate an ozone amount S: S=λ1+λ2+...λ a +...λ i = ,T1+T2+...T a +...+T i =A n+1 .

[0094] The disinfection method of the smoke machine of the application, the air collecting cavity has an air inlet and an air outlet; in step S21, closing the air collecting cavity includes the following steps:

[0095] S211: Close the air inlet and detect the state of the air inlet;

[0096] S212: Close the air outlet and detect the state of the air outlet;

[0097] When the air inlet is in a closed state and the air outlet is in a closed state, the control module judges that the air collecting cavity is in a closed state, and enters step S22.

[0098] Before performing the disinfection program, the air collecting cavity needs to be closed, so that the ozone generation unit 3 releases ozone in a closed space. When the air collecting cavity is closed, the movable panel 12 moves relative to the front panel 11 and closes the air inlet 111, the electric check valve 13 closes the air outlet, the air collecting cavity is in a closed state, the ozone generation unit 3 is in a state of communication with the air collecting cavity and starts to transport ozone into the air collecting cavity, and the fan 2 runs at a low speed. The fan 2 runs at a low speed, disturbs the air, so that the ozone is uniformly distributed in the air collecting cavity, the ozone generation unit 3 maintains the ozone concentration in the air collecting cavity within a certain range and for a certain time, so as to achieve the effect of ozone disinfection and sterilization.

[0099] Please refer to Figure 2In the illustrated embodiment, the user side of the range hood body 1 has a front panel 11 and a movable panel 12. The front panel 11 is provided with an air inlet 111 that connects to the air collection chamber. The movable panel 12 can move relative to the front panel 11 to open or close the air inlet 111. The top of the range hood body 1 is provided with an air outlet, and an electric check valve 13 is provided at the air outlet. The electric check valve 13 is used to open or close the air outlet. When the range hood needs to perform self-cleaning, the movable panel 12 moves relative to the front panel 11 and opens the air inlet 111. The electric check valve 13 opens the air outlet, and the air collection chamber is connected to the external airflow through the air inlet 11 and the air outlet. The fan 2 runs, and the external air enters the air collection chamber through the air inlet 111 and is then discharged through the air outlet. Before performing self-cleaning, the status of the air inlet 111 and the air outlet is checked to ensure that the airflow in the air collection chamber is connected, so that the fan 2 can start at the maximum airflow level and throw off the oil stains on the volute and impeller.

[0100] The movable panel 12 can move up and down relative to the front panel 11. When the range hood enters the operating mode, the movable panel 12 slides down along the front panel 11 and closes the air inlet 111. When the range hood enters the disinfection mode, the movable panel 12 slides up along the front panel 11 and closes the air inlet 111. When the range hood is in the normal off state, the movable panel 12 is also in the state of closing the air inlet 111, which can prevent backflow of oil fumes.

[0101] The movable panel 11 can rotate relative to the front panel 12. When the range hood is in the normal off state, the movable panel 11 and the front panel 12 are on the same plane and the air inlet 111 is closed. When it is necessary to open the air inlet 111, the movable panel 12 rotates relative to the front panel 11, and the gap formed between the movable panel 12 and the front panel 11 forms the air inlet 111.

[0102] exist Figure 2 In the illustrated embodiment, the lower end of the movable panel 12 is rotatably connected to the lower end of the range hood body 1. When the air inlet 111 needs to be opened, the movable panel 12 is subjected to an inward rotational force, and the upper end of the movable panel 12 flips towards the inside of the range hood body 1. The movable panel 12 enters the air collection chamber through the air inlet 111 on the front panel 11, thus opening the air inlet 111. When the air inlet 111 needs to be closed, the movable panel 12 is subjected to an outward rotational force, and the upper end of the movable panel 12 flips towards the outside of the range hood body 1. The movable panel 12 moves out of the air collection chamber through the air inlet 111 on the front panel 11. Finally, the movable panel 12 and the front panel 11 are located in the same plane, thus closing the air inlet 111.

[0103] The technology used to switch the air outlet of the electric check valve 13 adopts existing technology, which will not be elaborated here for the sake of brevity.

[0104] The disinfection method of the range hood of the application, if the step S211 detects that the air inlet is in the open state or / and the step S212 detects that the air outlet is in the open state, returns to the step S211 or / and the step S212, after waiting for the time T1, returns to the step S211 or / and the step S212 again, if the step S211 detects that the air inlet is still in the open state or / and the step S212 detects that the air outlet is still in the open state, issues a pre-warning, reminds the user, and enters the step S3. Since the ozone has stimulation to the respiratory mucosa of the human body, when the ozone concentration in the air reaches 0.15ppm, it can be smelled; according to the international standard, when it reaches 0.5-1ppm, it can cause dry mouth and other discomforts; when it reaches 1-4ppm, it can cause cough; when it reaches 4-10ppm, it can cause strong cough. Therefore, when the range hood performs ozone disinfection, the air collecting cavity needs to be sealed, and either the air inlet or the air outlet is in the open state, and the range hood will not perform disinfection work, and the main control system of the range hood will start the program of closing the air inlet 111 and the air outlet again, so that the movable panel 12 moves relative to the front panel 11 and closes the air inlet 111, and the electric check valve 13 closes the air outlet. After waiting for the time T1, the step S211 or / and the step S212 is returned again, if the step S211 detects that the air inlet is still in the open state or / and the step S212 detects that the air outlet is still in the open state, a pre-warning is issued, the user is reminded, and the step S3 is entered, and the disinfection work is ended. If the step S211 or / and the step S212 is returned, and the step S211 detects that the air inlet is in the closed state, and the step S212 detects that the air outlet is in the closed state, the step S22 is entered: the ozone generating unit 3 is started, the ozone generating unit 3 is communicated with the air collecting cavity and transports ozone into the air collecting cavity.

[0105] The disinfection method of the range hood of the application, if in the step S24, after the time period A1 ends, the ozone concentration cannot be increased to C1 all the time, a pre-warning is issued, the user is reminded, and the step S25 is entered. If the ozone concentration cannot be increased to C1 all the time, the ozone generating unit 3 may exist, and the range hood issues a pre-warning, reminds the user to overhaul the ozone generating unit 3 and closes the ozone generating unit 3.

[0106] The disinfection method of the range hood of the application, before entering the step S2, further includes the step S0: self-cleaning of the range hood:

[0107] S01: opening the air collecting cavity;

[0108] S02: starting the fan 2 in the maximum air volume gear; the fan 2 runs in the maximum air volume gear for the time T2.

[0109] When the range hood starts the disinfection program, the cumulative oil fume production N reaches the set threshold N max, The oil dirt is accumulated in the range hood, the volute and the wind wheel of the fan 2 are the most adhered places of the oil dirt, and the fan 2 is difficult to be cleaned when the range hood is cleaned by the user, the fan 2 is started at the maximum air volume gear before disinfection, the wind wheel of the fan 2 runs fast, centrifugal force and large air volume are utilized to quickly shake off the oil on the wind wheel and the volute, and the inside of the air collecting cavity can be preliminarily dry cleaned; when subsequent ozone disinfection is performed, the total demand of ozone can be reduced, the ozone disinfection time can be shortened, and the use of the user is avoided.

[0110] The disinfection method of the range hood of the application, the air collecting cavity has an air inlet and an air outlet; in step S01, the air collecting cavity is opened, including the following steps:

[0111] S011: opening the air inlet and detecting the state of the air inlet;

[0112] S012: opening the air outlet and detecting the state of the air outlet;

[0113] When the air inlet is in the open state and the air outlet is in the open state, the control module judges that the air collecting cavity is in the open state, and step S02 is entered.

[0114] When the range hood needs to be self-cleaned, the movable panel 12 moves relative to the front panel 11 and opens the air inlet 111, the electric check valve 13 opens the air outlet, the air collecting cavity is in communication with external airflow through the air inlet 11 and the air outlet, the fan 2 runs, external air enters the air collecting cavity through the air inlet 111, and then is discharged from the air outlet; the state of the air inlet 111 and the air outlet is checked before self-cleaning, the air flow communication of the air collecting cavity is ensured, the fan 2 can be started at the maximum air volume gear and the oil dirt on the volute and the wind wheel can be shaken off.

[0115] In the disinfection method of the range hood of the application, if step S011 detects that the air inlet is in the closed state or / and step S012 detects that the air outlet is in the closed state, step S011 or / and step S012 is returned, after waiting for a time T1, step S011 or / and step S012 is returned again, if step S011 detects that the air inlet is still in the closed state or / and step S012 detects that the air outlet is still in the closed state, a pre-warning is issued to remind the user, and step S3 is entered.

[0116] Before the hood enters the sterilization program, the hood needs to be self-cleaned. The fan 2 starts at the maximum air volume position to throw off the oil stains on the volute and the fan wheel. When the fan 2 starts at the maximum air volume position, the air collecting cavity needs to be in an open state. At this time, the air inlet 111 and the air outlet of the hood main body 1 need to be both in an open state. If any one of the air inlet 111 and the air outlet is in a closed state, the air pressure in the air collecting cavity cannot be balanced when the fan 2 is running. If the air inlet 111 is in a closed state and the fan 2 starts, the airflow in the exhaust duct will flow back into the air collecting cavity. Therefore, if step S011 detects that the air inlet is in a closed state or / and step S012 detects that the air outlet is in a closed state, the hood will not be self-cleaned and will wait for a time T1. During the waiting process, the main control system will start the program to open the air inlet 111 and the air outlet again, so that the movable panel 12 moves relative to the front panel 11 and opens the air inlet 111, and the electric check valve 13 opens the air outlet. After waiting for a time T1, return to step S011 or / and step S012. If it is detected in step S011 that the air inlet is still in a closed state or / and it is detected in step S012 that the air outlet is still in a closed state, a warning is issued to remind the user, and step S3 is entered to end the sterilization work. If it is returned to step S011 or / and step S012, and it is detected in step S011 that the air inlet is in an open state and it is detected in step S012 that the air outlet is in an open state, then step S02 is entered: the fan 2 starts at the maximum air volume position; the fan 2 runs at the maximum air volume position for a time T2.

[0117] The sterilization method of the hood of the present application, in step S1, calculating the cumulative oil fume generation amount N includes the following steps:

[0118] S11: record the time D of each cooking of the user, and divide D into △ D1, △ D2... △ D f time periods;

[0119] S12: detect the oil fume concentration B1, B2...B f corresponding to △ D1, △ D2... △ D f time periods;

[0120] S13: record the hood exhaust air volume Q1, Q2...Q f corresponding to △ D1, △ D2... △ D f time periods;

[0121] S14: the oil fume amount N1 in each cooking process can be calculated:

[0122] N1= Q1 B1 △ D1+ Q2 B2 △ D2+...Q f B f △ D f = ;

[0123] S15: Accumulate the amount of oil fume generated each time cooking, and calculate the total actual oil fume amount N.

[0124] In the cooking process, the amount of oil fume generated is different in different cooking stages, and the operating power of the range hood is different, because the exhaust air volume of the range hood is also different. The time D of each cooking is divided into △ D1、 △ D2... △ D f time periods according to the different operating powers of the range hood. The oil fume concentration B1, B2...Bf corresponding to the time is obtained by detection, and the oil fume generation amount N i , N i =Q i B i △ D i , then:

[0125] In the △ D1 time period, the oil fume generation amount N11=Q1 B1 △ D1;

[0126] In the △ D2 time period, the oil fume generation amount N12=Q2 B2 △ D2; ...

[0127] In the △ D f time period, the oil fume generation amount N1 F =Q f B f △ D f ;

[0128] In the cooking process, the total amount of oil fume generated is N1=N11+N12+...N1 f =Q1 B1 △ D1+Q2 B2 △ D2+...+Q f B f △ D f = .

[0129] The sterilization method of the smoke machine of the present application further comprises step S27: opening the wind collecting cavity, and entering step S26 when the ozone concentration C in the wind collecting cavity is reduced to 0.1 ppm between step S25 and step S26. That is, the ozone concentration is maintained at C m for a period of time A m / 2 , C m / 2 ≥ 5 mg / m 3 , and the ozone concentration in the wind collecting cavity is still C m after the period of time A m / 2 ends. After the ozone generating unit 3 is closed in step S25 and the ozone generating unit 3 is isolated from the wind collecting cavity, the smoke machine enters step S27: opening the wind collecting cavity. At this time, the fan 2 still maintains the running state, the fan 2 sucks air through the air inlet and discharges air through the air outlet, discharges the remaining ozone in the wind collecting cavity out of the wind collecting cavity, and the air outlet of the ozone wind collecting cavity enters the smoke exhaust pipeline. When flowing along the smoke exhaust pipeline, the oil stains in the smoke exhaust pipeline are sterilized. In step S27, the ozone concentration in the wind collecting cavity is gradually reduced. When the ozone concentration in the wind collecting cavity is reduced to 0.1 ppm, the smoke machine enters step S26, and the fan 2 is closed. At this time, even if the air inlet of the wind collecting cavity is in the open state, the ozone concentration in the wind collecting cavity is lower than 0.1 ppm, and the ozone flowing out of the cooking environment through the air inlet does not affect the human body.

[0130] In another embodiment of the sterilization method of the smoke machine, step S28: keeping the wind collecting cavity in a closed state is further included after step S26, and enters step S3 when the ozone concentration C in the wind collecting cavity is reduced to 0.1 ppm. That is, the ozone concentration is maintained at C m for a period of time A m / 2 , C m / 2 ≥ 5 mg / m 3 , and the ozone concentration in the wind collecting cavity is still C m after the period of time A m / 2, the ozone generator unit 3 is closed, the ozone generator unit 3 is isolated from the air collecting cavity, and the air collecting cavity is kept in a closed state. At this time, the ozone generator unit 3 no longer transports ozone into the air collecting cavity. With the passage of time, the ozone decays, and the ozone concentration in the air collecting cavity gradually decreases. When the ozone concentration in the air collecting cavity decreases to 0.1 ppm, step S3 is entered, and the disinfection work is ended.

[0131] The above only is the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement or improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of sterilizing a range hood, the method comprising: The smoke machine comprises a smoke machine body (1), a fan (2) and an ozone generating unit (3), the smoke machine body (1) has a wind collecting cavity, the wind collecting cavity has an open state and a closed state, the fan (2) is arranged in the wind collecting cavity, the ozone generating unit (3) is arranged in the smoke machine body (1), the ozone generating unit (3) is selectively communicated with or isolated from the wind collecting cavity, and the smoke machine further comprises a control module, the control module is used for controlling the state of the wind collecting cavity and the working state of the ozone generating unit (3), and the disinfection method comprises the following steps: S1: calculating the accumulated oil smoke production N; When N reaches a set threshold N max a disinfection program is started: S21: closing the wind collecting cavity; S22: starting the ozone generating unit (3), the ozone generating unit (3) is communicated with the wind collecting cavity and transports ozone into the wind collecting cavity; S23: starting the fan (2) at a low speed, the fan (2) runs at a low speed and stirs the ozone entering the wind collecting cavity uniformly; S24: Real-time detection of ozone concentration in the air collection chamber; within the disinfection time A, A is divided into m time periods, each time period being denoted as A1, A2...A... n ...A m In A1, A3...A n-1 ...A n+1 ...A m Inside, the ozone generating unit (3) is controlled to raise the ozone concentration in the air collection chamber to C1 during the A1 time period when it starts working, and maintain the ozone concentration at C1 during the A2 time period. During the A3 time period, the ozone concentration decreases from C1 to C2, and so on. n-1 During the period, the ozone concentration remained at C （n-1） / 2 In A n During the time period, the ozone concentration decreased from C （n-1） / 2 Reduced to C （n+1） / 2 In A n+1 During the period, the ozone concentration remained at C （n+1） / 2 ,30min≤A≤120min,30mg / m 3 ≥C1≥C2≥...C n ...≥C m / 2 ≥5mg / m 3 , 2 < n < m, m > 3, and n is odd and m is even; S25: closing the ozone generating unit (3), the ozone generating unit (3) is isolated from the wind collecting cavity; S26: closing the fan (2); S3: ending the disinfection work.

2. The sterilization method of a range hood according to claim 1, wherein The volume of the wind collecting cavity, the target concentration C of ozone and the half-life period t of ozone under a specific temperature and humidity are stored in the control module; the method for controlling the ozone generating unit (3) is as follows: detecting the temperature T and the humidity H in the wind collecting cavity; the control module queries the half-life period t of ozone according to the temperature T and the humidity H; According to the half-life period t of the ozone, the ozone generation unit (3) operation time T i The amount of ozone generated inside S i , the calculation time T i The amount of ozone gas decay inside λ i : λ i = ; then in A n+1 for a time period, the ozone concentration is maintained at C （n+1） / 2 The amount of ozone that the ozone generation unit (3) needs to generate is S: S = λ1+ λ2+... λ a +... λ i = , T1+ T2+... T a +... + T i = A n+1 .

3. The sterilizing method of a range hood according to claim 1, wherein the wind collecting cavity has an air inlet and an air outlet; in step S21, closing the wind collecting cavity comprises the following steps: S211: closing the air inlet and detecting the state of the air inlet; S212: closing the air outlet and detecting the state of the air outlet; when the air inlet is in the closed state and the air outlet is in the closed state, the control module judges that the wind collecting cavity is in the closed state and enters step S22.

4. The sterilizing method of a range hood according to claim 3, wherein if the air inlet is detected to be in the open state in step S211 or / and the air outlet is detected to be in the open state in step S212, step S211 or / and step S212 is returned, after waiting for a time T1, step S211 or / and step S212 is returned again, if the air inlet is still detected to be in the open state in step S211 or / and the air outlet is still detected to be in the open state in step S212, a pre-warning is issued, the user is reminded, and step S3 is entered.

5. The sterilizing method of a range hood according to claim 1, wherein if in step S24, the ozone concentration cannot be increased to C1 all the time after the time period A1 ends, a pre-warning is issued, the user is reminded, and step S25 is entered.

6. The sterilizing method of a range hood according to claim 1, wherein before entering step S2, step S0: self-cleaning of the smoke machine is further included: S01: opening the wind collecting cavity; S02: starting the fan (2) at a maximum air volume gear; the fan (2) runs at the maximum air volume gear for T2 time.

7. The sterilization method of a range hood according to claim 6, wherein the wind collecting cavity has an air inlet and an air outlet; in step S01, opening the wind collecting cavity comprises the following steps: S011: opening the air inlet and detecting the state of the air inlet; S012: opening the air outlet and detecting the state of the air outlet; When the air inlet is in the open state and the air outlet is in the open state, the control module judges that the air collecting cavity is in the open state, and the process goes to step S02.

8. The sterilization method of a range hood according to claim 7, wherein If it is detected in step S011 that the air inlet is in the closed state or / and it is detected in step S012 that the air outlet is in the closed state, the process returns to step S011 or / and step S012, and after waiting for a time T1, the process returns to step S011 or / and step S012 again. If it is detected in step S011 that the air inlet is still in the closed state or / and it is detected in step S012 that the air outlet is still in the closed state, a pre-warning is sent out to remind the user, and the process goes to step S3.

9. The sterilizing method of a range hood according to claim 1, wherein In step S1, calculating the accumulated oil fume production amount N includes the following steps: S11: record the time D of each cooking of the user, and divide D into △ D1, △ D2... △ D f time periods; S12: detecting the time period corresponding to the oil fume concentration B1, B2...B △ D1, △ D2... △ D f time period corresponding to the oil fume concentration B1, B2...B f ; S13: record with △ D1, △ D2... △ D f The time period corresponds to the smoke exhaust fan Q1, Q2... Q f ; S14: The amount of oil fume produced in each cooking process N1 can be calculated: N1= Q1 B1 △ D1+ Q2 B2 △ D2+...Q f B f △ D f = ; S15: The amount of oil fume produced in each cooking process N1 is accumulated, and the total actual oil fume production amount N is calculated.

10. The sterilizing method of a range hood according to claim 1, wherein Between step S25 and step S26, there is also step S27: the air collecting cavity is opened, and when the ozone concentration C in the air collecting cavity is reduced to 0.1 ppm, the process goes to step S26. Or, after step S26, there is also step S28: the air collecting cavity is kept in the closed state until the ozone concentration C in the air collecting cavity is reduced to 0.1 ppm, and then the process goes to step S3.

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