A control method of a smoke machine with adjustable air suction port

Abstract

The application discloses a control method of a smoke machine with adjustable air suction port. When the smoke machine is normally started, the normally-opened air suction port of the smoke machine is opened, and an air suction port adjusting module adjusts the operation power of the smoke exhaust fan according to the PM2.5 concentration C in the air, so that the smoke exhaust fan can quickly exhaust the oil fume, and the smoke exhaust effect of the smoke machine is ensured. When the PM2.5 concentration C in the air is less than or equal to C1 and the maintaining time exceeds time T1, the air suction port adjusting module opens part or all of the normally-closed air suction ports, so that the area of the effective air suction port is increased, the PM2.5 content in the air does not exceed the standard, the wind resistance of the oil fume at the air suction port is reduced, and the noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of range hood technology, in particular, to a control method of a range hood with adjustable air inlet. BACKGROUND

[0002] The range hood comprises a housing, the housing encloses a range hood air inlet and a smoke exhaust duct, a smoke exhaust fan is arranged in the smoke exhaust duct, when the range hood is working, the smoke exhaust fan is started and a negative pressure area is formed at the range hood air inlet, the oil fume generated by the user during cooking flows to the negative pressure area, and then enters the smoke exhaust duct from the range hood air inlet under the action of the smoke exhaust fan, and finally is exhausted. When the power of the range hood is constant, the cross-sectional area of the range hood air inlet has a certain influence on the negative pressure formed at the range hood air inlet by the smoke exhaust fan and the wind speed of the oil fume passing through the range hood air inlet. Generally, the smaller the cross-sectional area of the range hood air inlet, the greater the negative pressure formed at the range hood air inlet by the smoke exhaust fan, the greater the flow rate of the oil fume passing through the range hood air inlet, the greater the wind resistance generated by the range hood air inlet when the oil fume passes through, and the greater the noise of the oil fume entering through the range hood air inlet. The larger the cross-sectional area of the range hood air inlet, the relatively smaller the negative pressure formed at the range hood air inlet by the smoke exhaust fan, the relatively smaller the wind resistance of the oil fume passing through the range hood air inlet, and the smaller the noise of the oil fume entering through the range hood air inlet. When the user is cooking, if the speed of the oil fume generated by the user during cooking is relatively fast and the oil fume quantity is relatively large, at this time the user should increase the power of the smoke exhaust fan to form a larger negative pressure at the range hood air inlet, so that the range hood can timely and quickly exhaust the oil fume generated during cooking. When the user is cooking, if the speed of the oil fume generated by the user during cooking is relatively slow and the oil fume quantity is relatively small, at this time the user usually reduces the power of the smoke exhaust fan to form a smaller negative pressure at the range hood air inlet to deal with the oil fume. When the power of the smoke exhaust fan is the same, the smaller the cross-sectional area of the range hood air inlet, the greater the noise of the airflow passing through the range hood air inlet, and the larger the cross-sectional area of the range hood air inlet, the smaller the noise of the airflow passing through the range hood air inlet. If the cross-sectional area of the range hood air inlet is adjustable, when the oil fume concentration is relatively large, a smaller range hood air inlet can be used to quickly exhaust the oil fume, and when the oil fume is relatively small, the cross-sectional area of the range hood air inlet can be increased to reduce the noise at the range hood air inlet. SUMMARY

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

[0004] A control method of a smoke machine with adjustable air suction port, the smoke machine comprising a smoke machine body, a main control module, a PM2.5 detection module and a timing module, the smoke machine body having an air suction panel, a movable panel, an air suction port adjusting module and a wind collecting box, the wind collecting box being provided with an exhaust fan, the air suction panel being provided with an air suction port in communication with the wind collecting box, the air suction port comprising a normally open air suction port and a normally closed air suction port, the normally closed air suction port being located below the normally open air suction port, the area of the part where the normally open air suction port and the normally closed air suction port are jointly opened being the area of the effective air suction port, the air suction port adjusting module being used to drive the movable panel to move and open the normally open air suction port, or continue to drive the movable panel to move after the normally open air suction port is opened, and open part or all of the normally closed air suction port, so as to adjust the size of the effective air suction port, the PM2.5 detection module, the timing module, the air suction port adjusting module and the exhaust fan being electrically connected to the main control module;

[0005] The control method comprises the following steps:

[0006] S1: starting the smoke machine;

[0007] S2: opening the normally open air suction port: the air suction port adjusting module is started and drives the movable panel to open the normally open air suction port;

[0008] S3: the smoke machine performs oil fume extraction work:

[0009] S31: the exhaust fan operates at a power Pmin;

[0010] S32: the PM2.5 detection module is started and detects the concentration C of PM2.5 in the air in real time:

[0011] If C1

[0012] If C>C2, the main control module controls to increase the operating power of the exhaust fan until the concentration C of PM2.5 in the air detected by the PM2.5 detection module satisfies C≤C2;

[0013] If C≤C1, the timing module is started and begins to time, and if the concentration of PM2.5 in the air detected by the PM2.5 detection module always satisfies C≤C1 within a time T1, step S33 is entered:

[0014] S33: increasing the area of the effective air suction port: the air suction port adjusting module is started and drives the movable panel to open part of the normally closed air suction port:

[0015] If the concentration C of PM2.5 in the air detected by the PM2.5 detection module satisfies C1

[0016] If the concentration C of PM2.5 in the air detected by the PM2.5 detection module still satisfies C≤C1 and maintains for a time T2, step S34 is entered;

[0017] If the PM2.5 concentration C detected by the PM2.5 detection module is greater than C2, go to step S35;

[0018] S34: Continue to increase the area of the effective air inlet: the air inlet adjustment module is started and drives the movable panel to open all the normally closed air inlets;

[0019] If the PM2.5 concentration C detected by the PM2.5 detection module satisfies C≤C2 and maintains for a time T3, keep the current effective air inlet area;

[0020] If the PM2.5 concentration C detected by the PM2.5 detection module is greater than C2, go to step S35;

[0021] S35: Reduce the area of the effective air inlet: the air inlet adjustment module is started and drives the movable panel to adjust the area of the effective air inlet back to the size before the last increase;

[0022] S4: The cooking is finished, and the range hood is turned off;

[0023] S41: The exhaust fan, the timing module, and the PM2.5 detection module are turned off;

[0024] S42: The air inlet is turned off: the air inlet adjustment module is started and drives the movable panel to turn off the air inlet.

[0025] According to an embodiment of the present application, the movable panel has a first height H1, a second height H2, a third height H3, and a fourth height H4, the normally closed air inlet has a first opening height L1 and a second opening height L2, when the movable panel closes the air inlet, the movable panel is located at the first height H1; in step S2, the air inlet adjustment module drives the movable panel to move to the second height H2, and the movable panel opens the normally open air inlet; in step S33, the air inlet adjustment module drives the movable panel to move to the third height H3, and the normally closed air inlet is opened to the first opening height L1; in step S34, the air inlet adjustment module drives the movable panel to move to the fourth height H4, and the normally closed air inlet is opened to the second opening height L2; in step S35, the air inlet adjustment module drives the movable panel to return to the third height H3 or the second height H2.

[0026] According to an embodiment of the present application, the air inlet adjusting module comprises a driving motor, a driving gear and a driving rack, the driving motor is a motor with a Hall sensor, the output end of the driving motor is connected to the driving gear, the driving gear is engaged with the driving rack, the driving rack is slidingly connected to the air inlet panel, the movable panel is connected to the driving rack, the main control module stores the distance that the movable panel needs to move when opening the normally open air inlet, the distance that the movable panel needs to move when opening the normally closed air inlet to the corresponding height, and the transmission ratio of the driving gear and the driving motor.

[0027] According to an embodiment of the present application, the rear side wall surface of the air inlet panel is provided with a guide assembly, the guide assembly comprises a sliding seat and a sliding block, the sliding block is arranged on the rear side wall surface of the air inlet panel, the sliding block is slidingly connected to the sliding seat, the driving rack is connected to the sliding block, and the guide assembly further comprises a first connecting piece and a second connecting piece, the first connecting piece is connected to the sliding block, the second connecting piece is arranged on the movable panel, the air inlet panel is provided with a guide groove, and the connecting part of the second connecting piece is connected to the connecting part of the first connecting piece through the guide groove.

[0028] According to an embodiment of the present application, in step S2, the main control module calculates the arc length that the driving gear needs to rotate according to the height (H2-H1), then calculates the number of revolutions that the driving motor needs to rotate through the transmission ratio, and sends a control signal to the driving motor, in the process of starting the driving motor, the Hall sensor detects the number of revolutions of the output shaft of the driving motor and sends a signal to the main control module, and then monitors whether the normally open air inlet is opened to the position in step S2.

[0029] According to an embodiment of the present application, in steps S33, S34, S35 and S42, the main control module determines the state that the normally closed air inlet needs to adjust according to the PM2.5 concentration value, and then controls the air inlet adjusting module to drive the movable panel to switch between the two positions, according to the height that the movable panel needs to move when switching between the two positions, the driving gear rotates the corresponding arc length, then calculates the number of revolutions that the driving motor needs to rotate through the transmission ratio, and sends a control signal to the driving motor, in the process of starting the driving motor, the Hall sensor detects the number of revolutions of the output shaft of the driving motor and sends a signal to the main control module, and then monitors whether the effective air inlet is adjusted to the appropriate size in steps S33, S34, S35 and S42.

[0030] According to an embodiment of the present application, the air quality has a first pollution concentration C1, a second pollution concentration C2 and a third pollution concentration C3, C1C2C3, in step S32, if the PM2.5 concentration C1C2 in the air detected by the PM2.5 detection module, the exhaust fan operates at Pmin; if the PM2.5 concentration C2C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=P1, if the PM2.5 concentration C>C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=Pmax, PminP1Pmax.

[0031] According to an embodiment of the present application, the air quality has a first pollution concentration C1, a second pollution concentration C2 and a third pollution concentration C3, C1C2C3, in step S32, if the PM2.5 concentration C1C2 in the air detected by the PM2.5 detection module, the exhaust fan operates at Pmin; if the PM2.5 concentration C2C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=P1, if the PM2.5 concentration C>C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=Pmax, PminP1Pmax.

[0032] According to an embodiment of the present application, the air quality has a first pollution concentration C1, a second pollution concentration C2 and a third pollution concentration C3, C1C2C3, in step S32, if the PM2.5 concentration C1C2 in the air detected by the PM2.5 detection module, the exhaust fan operates at Pmin; if the PM2.5 concentration C2C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=P1, if the PM2.5 concentration C>C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=Pmax, PminP1Pmax.

[0033] According to an embodiment of the present application, the air quality has a first pollution concentration C1, a second pollution concentration C2 and a third pollution concentration C3, C1C2C3, in step S32, if the PM2.5 concentration C1C2 in the air detected by the PM2.5 detection module, the exhaust fan operates at Pmin; if the PM2.5 concentration C2C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=P1, if the PM2.5 concentration C>C3 in the air detected by the PM2.5 detection module, the exhaust fan operates at P=Pmax, PminP1Pmax.

[0034] Compared with the prior art, the control method of the air inlet adjustable range hood of the present application has the following advantages:

[0035] The control method of the smoke machine with adjustable air suction port of the application, when the smoke machine is normally started, the normally open air suction port of the smoke machine is opened, the air suction port adjusting module first adjusts the operation power of the smoke exhaust fan according to the PM2.5 concentration C in the air, so that the smoke exhaust fan can quickly exhaust the oil fume, to ensure the smoke exhaust effect of the smoke machine, after the PM2.5 concentration C in the air is less than or equal to C1 and the maintaining time exceeds time T1, the air suction port adjusting module opens part or all of the normally closed air suction port, so that the area of the effective air suction port is increased, which can not only make the PM2.5 content in the air exceed the standard, but also reduce the wind resistance of the oil fume at the air suction port and reduce the noise. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the smoke machine with adjustable air suction port of the application;

[0037] Figure 2 It is a structural schematic diagram of another embodiment of the smoke machine with adjustable air suction port of the application;

[0038] Figure 3 It is a structural schematic diagram of the smoke machine with adjustable air suction port of the application after removing the movable panel;

[0039] Figure 4 It is an exploded view of the smoke machine with adjustable air suction port of the application;

[0040] Figure 5 It is a sectional view of the smoke machine with adjustable air suction port of the application;

[0041] Figure 6 It is a structural schematic diagram of the movable panel in the application;

[0042] Figure 7 It is a structural schematic diagram of the air suction port adjusting module in the application;

[0043] Figure 8 It is Figure 7 It is an enlarged view of part A in the application;

[0044] Figure 9 It is a flow schematic diagram of the control method of the smoke machine with adjustable air suction port of the application;

[0045] Figure 10 It is a module schematic diagram of the smoke machine with adjustable air suction port of the application.

[0046] In the figure: 1. Suction panel; 11. Suction port; 2. Movable panel; 3. Suction port adjusting module; 4. Air collecting box; 5. Exhaust fan; 31. Driving motor; 32. Driving gear; 33. Driving rack; 12. Guide assembly; 121. Slide base; 122. Slide block; 13. First connecting piece; 21. Second connecting piece; 14. Guide groove; 6. Movable baffle; 15. Concave groove; 7. Elastic support; 22. Linkage; 61. Avoidance groove; 211. Force applying part.

[0047] The implementation and advantages of the present application will be further described in conjunction with the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0048] The present application will now be described in detail with reference to a few embodiments thereof as illustrated in the accompanying drawings. The following together with the accompanying drawings is better to understand the nature and advantages of the present application.

[0049] It should be noted that all directional directions (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional directions will also change accordingly.

[0050] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and is not particularly intended to indicate the order or sequence, nor is it intended to limit the present application. It is merely 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 implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment 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, nor is it within the scope of protection required by the present application.

[0051] In order to further understand the content, characteristics and effects of the present application, the following embodiments are exemplified, and are described in detail as follows in conjunction with the accompanying drawings:

[0052] The present application discloses a control method of a smoke machine with adjustable suction port, please refer to Figures 1 to 4The range hood comprises a range hood body, a main control module, a PM2.5 detection module and a timing module. The range hood body has a suction panel 1, a movable panel 2, a suction port adjusting module 3 and a wind collecting box 4. The wind collecting box 4 is provided with a range hood fan 5. The suction panel 1 is provided with a suction port 11 communicating with the wind collecting box 4. The suction port 11 comprises a normally open suction port and a normally closed suction port. The normally closed suction port is located below the normally open suction port. The area of the part where the normally open suction port and the normally closed suction port are jointly opened is the area of the effective suction port. The suction port adjusting module 3 is used to drive the movable panel 2 to move and open the normally open suction port, or to continue driving the movable panel 2 to move after the normally open suction port is opened, and open part or all of the normally closed suction port, so as to adjust the size of the effective suction port. The PM2.5 detection module, the timing module, the suction port adjusting module 3 and the range hood fan 5 are electrically connected to the main control module.

[0053] Please refer to Figure 9 The control method comprises the following steps:

[0054] S1: starting the range hood;

[0055] S2: opening the normally open suction port: the suction port adjusting module 3 is started and drives the movable panel 2 to open the normally open suction port;

[0056] S3: the range hood performs the oil fume extraction work:

[0057] S31: the range hood fan 5 operates at the power Pmin;

[0058] S32: the PM2.5 detection module is started and detects the concentration C of PM2.5 in the air in real time:

[0059] If C1

[0060] If C>C2, the main control module controls to increase the operating power of the range hood fan 5 until the concentration C of PM2.5 in the air detected by the PM2.5 detection module satisfies C≤C2;

[0061] If C≤C1, the timing module is started and begins to time. If the concentration of PM2.5 in the air detected by the PM2.5 detection module always satisfies C≤C1 within the time T1, step S33 is entered:

[0062] S33: increasing the area of the effective suction port: the suction port adjusting module 3 is started and drives the movable panel 2 to open part of the normally closed suction port:

[0063] If the concentration C of PM2.5 in the air detected by the PM2.5 detection module satisfies C1

[0064] If the PM2.5 concentration C detected by the PM2.5 detection module still satisfies C≤C1 and maintains for a time T2, then go to step S34;

[0065] If the PM2.5 concentration C detected by the PM2.5 detection module satisfies C>C2, then go to step S35;

[0066] S34: Continue to increase the area of the effective air suction port: the air suction port adjustment module 3 is started and drives the movable panel 2 to open all the normally closed air suction ports;

[0067] If the PM2.5 concentration C detected by the PM2.5 detection module satisfies C≤C2 and maintains for a time T3, then keep the current area of the effective air suction port;

[0068] If the PM2.5 concentration C detected by the PM2.5 detection module satisfies C>C2, then go to step S35;

[0069] S35: Reduce the area of the effective air suction port: the air suction port adjustment module 3 is started and drives the movable panel 2 to adjust the area of the effective air suction port back to the size before the last increase;

[0070] S4: Cooking is finished, the range hood is turned off:

[0071] S41: The exhaust fan 5, the timing module and the PM2.5 detection module are turned off;

[0072] S42: The air suction port 11 is turned off: the air suction port adjustment module 3 is started and drives the movable panel 2 to turn off the air suction port 11.

[0073] The PM2.5 detection module can detect the PM2.5 concentration C in the air, which can reflect the oil fume concentration, that is, the greater the oil fume concentration, the greater the PM2.5 concentration C in the air, C1 is a very low PM2.5 concentration value, which can be set in the system, C2 is an industry standard value, when the PM2.5 concentration in the air is lower than C2, the air quality of the cooking environment is up to standard, when the PM2.5 concentration in the air is lower than C2 and the normally closed air suction port is not opened, the power of the exhaust fan 5 needs to be adjusted to increase the suction capacity of the oil fume, so that the air is up to standard, when the normally closed air suction port is partially or completely opened, the area of the effective air suction port needs to be reduced to increase the negative pressure at the air suction port, so as to improve the suction capacity of the oil fume.

[0074] The control method of the smoke machine with adjustable air suction port of the application, when the smoke machine starts, the air suction port adjusting module 3 starts and drives the movable panel 2 to open the normally open air suction port, at this time the effective air suction port area is the area of the normally open air suction port, which is also the minimum air suction area of the smoke machine when it starts, after the smoke machine starts, the exhaust fan 5 runs at the default power Pmin, at the same time the PM2.5 detection module starts to detect the PM2.5 concentration in the air, and adjusts the running power of the exhaust fan 5 according to the PM2.5 concentration, when the PM2.5 detection module detects that the PM2.5 concentration in the air is C1

[0075] After the air suction port adjusting module 3 opens part of the effective air suction port, if the PM2.5 detection module detects that the PM2.5 concentration in the air is C1

[0076] After the air suction port adjusting module 3 opens part of the normally closed air suction port, if the PM2.5 detection module detects that the PM2.5 concentration in the air is C

[0077] After the air inlet adjusting module 3 opens part of the normally closed air inlets, the PM2.5 detection module detects that the PM2.5 concentration C in the air is less than or equal to C1 for a time T2, which indicates that the PM2.5 content in the air is still very low after the effective air inlet area is increased. At this time, the normally closed air inlets can be further opened to further increase the effective air inlet area and continuously reduce the noise of the range hood when it is running to improve the comfort of the user.

[0078] After the effective air inlet area is increased twice, if the PM2.5 detection module detects that the PM2.5 concentration C1 < C ≤ C2 in the air, which indicates that the air quality of the cooking environment meets the standard at this time. The effective air inlet area remains in the state after the second adjustment until the PM2.5 content in the air changes or the cooking is completed.

[0079] After the effective air inlet area is increased twice, if the PM2.5 detection module detects that the PM2.5 concentration C > C2 in the air, which indicates that the negative pressure at the air inlet 11 is small after the effective air inlet area is increased again, the oil fume cannot be discharged in time, and the air quality of the cooking environment is poor. At this time, the main control module should control the air inlet adjusting module 3 to close the normally closed air inlets that are opened twice to restore the effective air inlet area to the size before the second adjustment until the PM2.5 content in the air changes or the cooking is completed.

[0080] After the effective air inlet area is increased twice, if the PM2.5 detection module detects that the PM2.5 concentration C ≤ C1 in the air for a time T2, which indicates that the PM2.5 content in the air is still very low after the effective air inlet area is increased. At this time, if the normally closed air inlets have been completely opened, the air inlet 11 remains in the current state. If the normally closed air inlets have not been completely opened, the normally closed air inlets can be further opened.

[0081] The control method of the air inlet adjustable range hood of the present application can open the normally open air inlets of the range hood when the range hood is normally started. The air inlet adjusting module adjusts the operating power of the exhaust fan 5 according to the PM2.5 concentration C in the air to enable the exhaust fan 5 to quickly discharge the oil fume to ensure the exhaust effect of the range hood. After the PM2.5 concentration C in the air is less than or equal to C1 for a time T1, the air inlet adjusting module opens part or all of the normally closed air inlets to increase the effective air inlet area, which does not make the PM2.5 content in the air exceed the standard and reduces the wind resistance of the oil fume at the air inlet 11 to reduce the noise.

[0082] According to an embodiment of the present application, please refer to Figures 1 to 4, the movable panel 2 has a first height H1, a second height H2, a third height H3 and a fourth height H4, the first opening height L1 and the second opening height L2, when the movable panel 2 closes the air inlet 11, the movable panel 2 is at the first height H1; in step S2, the air inlet adjusting module 3 drives the movable panel 2 to move to the second height H2, and the movable panel 2 opens the always-open air inlet; in step S33, the air inlet adjusting module 3 drives the movable panel 2 to move to the third height H3, and the always-closed air inlet is opened to the first opening height L1; in step S34, the air inlet adjusting module 3 drives the movable panel 2 to move to the fourth height H4, and the always-closed air inlet is opened to the second opening height L2; in step S35, the air inlet adjusting module 3 drives the movable panel 2 to return to the third height H3 or the second height H2.

[0083] For the convenience of description, the following definitions are made: when the always-open air inlet is opened, the effective air inlet area is Smin; when the always-closed air inlet is opened for the first time, the effective air inlet area is Smid; when the always-closed air inlet is opened for the second time, the effective air inlet area is Smax, and Smax is the area of the always-closed air inlet when it is fully opened.

[0084] The size relationship of the first height H1, the second height H2, the third height H3 and the fourth height H4 is H1>H2>H3>H4. The size relationship of the first opening height L1 and the second opening height L2 is L1>L2. When the movable panel 2 closes the air inlet 11, it is at the highest first height H1. When the opening area of the effective air inlet is Smin, the movable panel 2 is at the second height H2. When the area of the effective air inlet is increased for the first time to Smid, the movable panel 2 is at the third height H3, and the always-closed air inlet is opened to the first opening height L1. When the area of the effective air inlet is increased for the second time to Smax, the movable panel 2 is at the lowest fourth height H4, and the always-closed air inlet is opened to the second opening height L2. By adjusting the height of the movable panel 2 and the always-closed air inlet to control the area of the effective air inlet, the adjustment mode of the effective air inlet can be simplified, and the effective air inlet can be adjusted to the position faster each time, thereby improving the adjustment efficiency.

[0085] According to an embodiment of the present application, please refer to Figure 7 and Figure 8, the air suction adjusting module 3 comprises a driving motor 31, a driving gear 32 and a driving rack 33, the driving motor 31 is a motor with a Hall sensor, the output end of the driving motor 31 is connected with the driving gear 32, the driving gear 32 is engaged with the driving rack 33, the driving rack 33 is slidingly connected with the air suction panel 1, the movable panel 2 is connected with the driving rack 33, the main control module stores the distance that the movable panel 2 needs to move when the normally open air suction port needs to be opened, the distance that the movable panel 2 needs to move when the normally closed air suction port is opened to the corresponding height and the transmission ratio of the driving gear 32 and the driving motor 31.

[0086] The transmission structure composed of the driving gear 32 and the driving rack 33 can convert the rotation of the output end of the driving motor 31 into the linear motion of the movable panel 2. The Hall sensor can detect the rotation number of the output shaft of the driving motor 31. When the normally open air suction port needs to be opened or the area of the effective air suction port needs to be adjusted, the main control module calculates the number of rotations that the driving motor 31 needs to rotate according to the distance that the movable panel 2 needs to move and the transmission ratio of the driving gear 32 and the driving motor 31. When the driving motor 31 is started, the Hall sensor detects the number of rotations of the output shaft of the driving motor 31 in real time when the driving motor 31 drives the movable panel 2 to move, and sends the information to the main control module, so as to ensure that the position of the movable panel 2 driven by the driving motor 31 to move is consistent with the position information stored in the main control module. When the number of rotations of the output end of the driving motor 31 reaches the preset number of rotations, the main control module controls the driving motor 31 to stop rotating, so that the movable panel 2 stays at the preset position.

[0087] According to an embodiment of the present application, please refer to Figure 7 and Figure 8 The rear side wall surface of the air suction panel 1 is provided with a guide assembly 12, the guide assembly 12 comprises a sliding seat 121 and a sliding block 122, the sliding block 122 is arranged on the rear side wall surface of the air suction panel 1, the sliding block 122 is slidingly connected with the sliding seat 121, the driving rack 33 is connected with the sliding block 122, the air suction adjustable range hood further comprises a first connecting piece 13 and a second connecting piece 21, the first connecting piece 13 is connected with the sliding block 122, the second connecting piece 21 is arranged on the movable panel 2, the air suction panel 1 is provided with a guide groove 14, and the connecting part of the second connecting piece 21 is connected with the connecting part of the first connecting piece 13 through the guide groove 14.

[0088] The sliding block 122 and the movable panel 2 are connected through the first connecting piece 13 and the second connecting piece 21, and the driving rack 33 can drive the movable panel 2 to move through the sliding block 122. The sliding seat 121 can guide the sliding block 122, and the guide groove 14 can guide the second connecting piece 21. In this way, through double guiding, it can be ensured that the movable panel 2 can move in the preset sliding track, and the movement stability of the movable panel 2 can be improved.

[0089] According to an embodiment of the present application, in step S2, the main control module calculates the arc length that the driving gear 32 needs to rotate according to the height (H2-H1), and then calculates the number of revolutions that the driving motor 31 needs to rotate through the transmission ratio, and sends a control signal to the driving motor 31. During the starting process of the driving motor 31, the Hall sensor detects the number of revolutions of the output shaft of the driving motor 31, and sends a signal to the main control module, thereby monitoring whether the always-open air inlet is opened to the right position in step S2.

[0090] If the number of revolutions of the output shaft of the driving motor 31 reaches the preset number of revolutions, it means that the driving gear 32 has rotated a preset arc length, and the movable panel 2 has also moved a preset stroke, thereby indicating that the always-open air inlet has been opened to the right position in step S2. By monitoring the number of revolutions of the output shaft of the driving motor 31 to monitor whether the always-open air inlet is opened to the right position, the monitoring method of the opening state of the always-open air inlet can be simplified, and the effective utilization rate of the Hall sensor can be improved.

[0091] According to an embodiment of the present application, in steps S33, S34, S35 and S42, the main control module determines the state that the always-closed air inlet needs to adjust according to the PM2.5 concentration value, and then controls the air inlet adjusting module 3 to drive the movable panel 2 to switch between the two positions, according to the height that the movable panel 2 needs to move when switching between the two positions, so that the driving gear 32 rotates a corresponding arc length, and then calculates the number of revolutions that the driving motor 31 needs to rotate through the transmission ratio, and sends a control signal to the driving motor 31. During the starting process of the driving motor 31, the Hall sensor detects the number of revolutions of the output shaft of the driving motor 31, and sends a signal to the main control module, thereby monitoring whether the effective air inlet is adjusted to the appropriate size in steps S33, S34, S35 and S42.

[0092] Taking step S33 as an example, if the concentration of PM2.5 in the air detected by the PM2.5 detection module always satisfies C≤C1 within time T1, the main control module needs to control the movable panel 2 to increase the area of the effective air inlet from Smin to Smid, at this time the movable panel 2 needs to move a stroke (H3-H2), the main control module calculates the corresponding arc length that the driving gear 32 needs to rotate according to the stroke (H3-H2) that the movable panel 2 needs to move, and then calculates the preset number of revolutions that the driving motor 31 needs to rotate through the transmission ratio between the driving gear 32 and the output shaft of the driving motor 31. After the main control module calculates the preset number of revolutions, it sends a control signal to the driving motor 31, and the driving motor 31 rotates according to the control signal. If the number of revolutions of the output shaft of the driving motor 31 reaches the preset number of revolutions, it means that the driving gear 32 has rotated a preset arc length, and the movable panel 2 has also moved a preset stroke (H3-H2), thereby indicating that the always-closed air inlet has been opened to a preset area in step S33, so that the area of the effective air inlet is effectively increased to Smid.

[0093] In steps S34, S35 and S42, the adjustment and monitoring logic of the air inlet adjusting module 3 to the air inlet 11 can refer to the above step S33, and will not be repeated here.

[0094] According to an embodiment of the present application, the air quality has a first pollution concentration C1, a second pollution concentration C2 and a third pollution concentration C3, C1<C2<C3, in step S32, if the PM2.5 concentration C1<C≤C2 in the air detected by the PM2.5 detection module, the exhaust fan 5 runs at Pmin; if the PM2.5 concentration C2<C≤C3 in the air detected by the PM2.5 detection module, the exhaust fan 5 runs at power P=P1, if the PM2.5 concentration C>C3 in the air detected by the PM2.5 detection module, the exhaust fan 5 runs at power P=Pmax, Pmin<P1<Pmax.

[0095] In step S2, the power of the exhaust fan 5 just started is the initial power, and the air pollution concentration at this time can be regarded as the initial pollution concentration. The pollution concentration of the air with PM2.5 concentration greater than C2 is divided into C2<C≤C3 and C>C3, and the exhaust fan 5 is controlled to start running at the corresponding initial power according to the different initial pollution concentration. The greater the initial pollution concentration, the greater the initial power of the exhaust fan 5, so that the exhaust fan can quickly exhaust the current cooking environment fume with reasonable energy consumption when it just starts to work, so as to improve the exhaust effect of the exhaust fan.

[0096] According to an embodiment of the present application, please refer to Figures 1 to 5 , the movable baffle 6 is provided between the air inlet panel 1 and the movable panel 2, the movable baffle 6 is in sliding connection with the air inlet panel 1, the movable baffle 6 shields part of the air inlet 11 and forms a normally closed air inlet, and the air inlet 11 always forms a normally open air inlet in the part not shielded by the movable baffle 6. In step S2, the air inlet adjusting module 3 drives the movable panel 2 to move alone, and in steps S33 and S34, the air inlet adjusting module 3 drives the movable panel 2 and the movable baffle 6 to move at the same time.

[0097] The movable baffle 6 is used to open or close the normally closed air suction port. When the range hood is started, the movable panel 2 moves downward and opens the normally open air suction port. At this time, the movable baffle 6 is located at the rear side of the movable panel 2, and the normally closed air suction port is blocked by the movable panel 2. When it is required to increase the area of the effective air suction port, the air suction port adjusting module 3 simultaneously drives the movable panel 2 and the movable baffle 6 to move. The movable panel 2 and the movable baffle 6 synchronously move downward. The movable baffle 6 moves downward to open part or all of the normally closed air suction port. The movable panel 2 synchronously moves downward to expose the opened normally closed air suction port from the rear side of the movable panel 2. The single-layer movable panel 2 can directly open the normally closed air suction port to control the size of the effective air suction port. However, since the movable panel 2 slides relative to the air suction panel 1, there is a gap between the movable panel 2 and the air suction panel 1. When the normally open air suction port is opened alone, the air flow in the gap between the movable panel 2 and the air suction panel 1 enters through the normally closed air suction port, which affects the negative pressure at the normally open air suction port. Therefore, the range hood adopting the control method of the air suction port adjustable range hood of the application is provided with the movable baffle 6 between the air suction panel 1 and the movable panel 2. When the movable panel 2 opens the normally open air suction port alone, the movable baffle 6 closes the normally closed air suction port to ensure the negative pressure at the normally open air suction port.

[0098] According to an embodiment of the application, referring to Figure 4 , the air suction panel 1 is provided with a groove 15, the air suction port 11 is arranged in the groove 15, and the movable baffle 6 is slidingly connected in the groove 15. The bottom of the groove 15 is provided with an elastic supporting piece 7, which supports the movable baffle 6 from the lower end of the movable baffle 6. In steps S33 and S34, the air suction port adjusting module 3 simultaneously drives the movable panel 2 and the movable baffle 6 to move. The movable baffle 6 moves and compresses the elastic supporting piece 7. In steps S35 and S42, the elastic supporting piece 7 resets and drives the movable baffle 6 to move upward.

[0099] The elastic supporting piece 7 can be elastically deformed when the movable baffle 6 approaches the bottom of the groove 15 to play a buffering role, preventing the movable baffle 6 from directly impacting the bottom of the groove 15 to generate noise or cause damage. If the driving force driving the movable baffle 6 to move downward is removed, the elastic supporting piece 7 can restore the deformation and drive the movable baffle 6 to reset upward by the elastic force, so that it is not necessary to additionally apply a reset driving force to the movable baffle 6, thereby reducing the energy consumption required for the movable baffle 6 to reset upward.

[0100] The smoke machine further comprises a fixed baffle arranged in the groove 15 and above the air inlet 11. When the movable baffle 6 closes the normally closed air inlet, the movable baffle 6 is in abutment with the fixed baffle, and the gaps between the movable baffle 6 and the fixed baffle and the part of the air inlet 11 in alignment with the gaps form the normally open air inlet. The upper edges of the two ends of the movable baffle 6 are provided with lower abutment portions, and the lower edges of the two ends of the fixed baffle are provided with upper abutment portions. When the movable baffle 6 closes the normally closed air inlet, the lower abutment portions are in abutment with the upper abutment portions, so that the gaps between the two upper abutment portions and the gaps between the two lower abutment portions together form the normally open air inlet. In this way, the minimum air inlet area of the normally open air inlet can be ensured, and the movable baffle 6 can be prevented from affecting the minimum air inlet volume of the normally open air inlet.

[0101] According to an embodiment of the present application, referring to Figure 5 and Figure 6 , the inner side of the movable panel 2 is provided with a linkage 22, and the movable baffle 6 is provided with an avoiding groove 61. The linkage 22 extends to the rear side of the air inlet panel 1 through the avoiding groove 61. In step S2, the linkage 22 moves along the avoiding groove 61, and the force applying portion 211 thereon reaches the lower edge of the avoiding groove 61. In steps S33 and S34, when the air inlet adjusting module 3 drives the movable panel 2 to move, the force applying portion 211 drives the movable baffle 6 to move synchronously. In steps S35 and S42, the force applying portion 211 moves upward with the linkage 22, the elastic support 7 is reset and drives the movable baffle 6 to move upward.

[0102] When the area of the effective air inlet needs to be increased from Smin or continue to be increased from Smid, the air inlet adjusting module 3 drives the movable panel 2 to continue to move downward, and the force applying portion 211 of the linkage 22 pushes the movable baffle 6 to move, so that the air inlet adjusting module 3 only needs to directly drive the movable panel 2, and the movable baffle 6 is driven by the movable panel 2, so as to simplify the driving mode of the movable baffle 6. When the movable panel 2 needs to adjust the area of the effective air inlet, the air inlet adjusting module 3 drives the movable panel 2 to move upward. At this time, the pushing force acting on the movable baffle 6 is removed, the elastic support 7 is reset and drives the movable baffle 6 to move upward.

[0103] The linkage 22 comprises a connecting section and an oil guiding section. The connecting section is connected with the inner side wall surface of the movable panel 2, and the front edge of the oil guiding section is connected with the lower edge of the connecting section. The oil guiding section extends to the rear side of the movable baffle 6 through the avoiding groove 61, and the part of the oil guiding section in alignment with the lower edge of the avoiding groove 61 is provided with the force applying portion 211. The oil liquid formed on the inner side wall surface of the movable panel 2 in the process of the oil fume entering the air collecting box 4 through the air inlet 11 flows along the oil guiding section and is guided into the inside of the smoke machine body after being received by the oil guiding section.

[0104] The lower surface of the force applying part 211 is horizontally arranged, the number of the force applying part 211 is multiple, and the multiple force applying parts 211 are uniformly distributed on the oil guiding section along the left-right direction. The lower surface of the force applying part 211 is horizontally arranged, which can increase the abutting area between the force applying part 211 and the lower edge of the avoiding groove 61, thereby improving the pushing stability of the force applying part 211 to the movable baffle 6. The number of the force applying part 211 is multiple, which can increase the pushing abutting position of the linkage 22 to the movable baffle 6, thereby dispersing the pushing force of the movable baffle 6 to each position on the upper edge of the avoiding groove 61 more evenly, preventing the movable baffle 6 from being stressed at a single position, thereby improving the movement stability and structural stability of the movable baffle 6.

[0105] When the always-open air inlet is opened, if the always-open air inlet is opened to the position, the force applying part 211 acts on the lower edge of the avoiding groove 61, the force applying part 211 applies force to the movable baffle 6, the movable panel 2 is subjected to the force in the upward direction, the load of the driving motor 31 is increased, and the main control module can monitor that the current of the driving motor 31 is suddenly increased. By monitoring the current of the driving motor 31 and cooperating with the stroke detected by the Hall sensor, it can be ensured that the always-open air inlet is opened to the position.

[0106] The above is only the preferred embodiment of the present application, and is not used to 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 control method of a smoke machine with adjustable suction port, the smoke machine comprising a smoke machine body, a main control module, a PM2.5 detection module and a timing module, the smoke machine body having a suction panel (1), a movable panel (2), a suction port adjusting module (3) and a wind collecting box (4), the wind collecting box (4) being provided with an exhaust fan (5) therein, the suction panel (1) being provided with a suction port (11) in communication with the wind collecting box (4), the suction port (11) comprising a normally open suction port and a normally closed suction port, the normally closed suction port being located below the normally open suction port, the area of the part of the normally open suction port and the normally closed suction port being opened together being the area of the effective suction port, the suction port adjusting module (3) being used to drive the movable panel (2) to move and open the normally open suction port, or to continue to drive the movable panel (2) to move after the normally open suction port is opened, and to open part or all of the normally closed suction port, so as to adjust the size of the effective suction port, the PM2.5 detection module, the timing module, the suction port adjusting module (3) and the exhaust fan (5) being electrically connected to the main control module, characterized in that, The control method comprises the following steps: S1: starting the range hood; S2: opening the always-open air inlet: the air inlet adjustment module (3) starts and drives the movable panel (2) to open the always-open air inlet; S3: the range hood performs the oil fume extraction work: S31: the exhaust fan (5) operates at a power Pmin; S32: the PM2.5 detection module starts and detects the concentration C of PM2.5 in the air in real time: If C1 < C ≤ C2, the exhaust fan (5) keeps operating at the power Pmin; If C > C2, the main control module controls to increase the operating power of the exhaust fan (5) until the concentration C of PM2.5 in the air detected by the PM2.5 detection module is less than or equal to C2; If C ≤ C1, the timing module starts and begins timing, and if the concentration of PM2.5 in the air detected by the PM2.5 detection module always satisfies C ≤ C1 within the time T1, step S33 is entered: S33: increasing the area of the effective air inlet: the air inlet adjustment module (3) starts and drives the movable panel (2) to open part of the normally-closed air inlets: If the concentration C of PM2.5 in the air detected by the PM2.5 detection module satisfies C1 < C ≤ C2, the current effective air inlet area is kept; If the concentration C of PM2.5 in the air detected by the PM2.5 detection module still satisfies C ≤ C1 and maintains for the time T2, step S34 is entered; If the concentration C of PM2.5 in the air detected by the PM2.5 detection module is greater than C2, step S35 is entered; S34: continuously increasing the area of the effective air inlet: the air inlet adjustment module (3) starts and drives the movable panel (2) to open all the normally-closed air inlets; If the concentration C of PM2.5 in the air detected by the PM2.5 detection module satisfies C ≤ C2 and maintains for the time T3, the current effective air inlet area is kept; If the concentration C of PM2.5 in the air detected by the PM2.5 detection module is greater than C2, step S35 is entered; S35: reducing the area of the effective air inlet: the air inlet adjustment module (3) starts and drives the movable panel (2) to adjust the area of the effective air inlet back to the size before the last increase; S4: the cooking is finished, and the range hood is turned off: S41: the exhaust fan (5), the timing module and the PM2.5 detection module are turned off; S42: the air inlet is closed: the air inlet adjustment module (3) starts and drives the movable panel (2) to close the air inlet (11); Wherein, C1 and C2 are set values, C2 is an industry standard value, and C1 is less than C2.

2. The control method of the range hood with an adjustable air suction port according to claim 1, wherein The movable panel (2) has a first height H1, a second height H2, a third height H3 and a fourth height H4, and the normally closed air inlet has a first opening height L1 and a second opening height L2. When the movable panel (2) closes the air inlet (11), the movable panel (2) is at the first height H1. In step S2, the air inlet adjusting module (3) drives the movable panel (2) to move to the second height H2, and the movable panel (2) opens the normally open air inlet. In step S33, the air inlet adjusting module (3) drives the movable panel (2) to move to the third height H3, and the normally closed air inlet is opened to the first opening height L1. In step S34, the air inlet adjusting module (3) drives the movable panel (2) to move to the fourth height H4, and the normally closed air inlet is opened to the second opening height L2. In step S35, the air inlet adjusting module (3) drives the movable panel (2) to return to the third height H3 or the second height H2.

3. The control method of the range hood with an adjustable air suction port according to claim 2, characterized in that, The air inlet adjusting module (3) includes a drive motor (31), a drive gear (32) and a drive rack (33). The drive motor (31) is a motor with a Hall sensor. The output end of the drive motor (31) is connected to the drive gear (32). The drive gear (32) is engaged with the drive rack (33). The drive rack (33) is slidingly connected to the air inlet panel (1). The movable panel (2) is connected to the drive rack (33). The main control module stores the distance the movable panel (2) needs to move to open the normally open air inlet, the distance the movable panel (2) needs to move to open the normally closed air inlet to the corresponding height, and the transmission ratio of the drive gear (32) and the drive motor (31).

4. The control method of the range hood with an adjustable air suction port according to claim 3, characterized in that, The rear side wall surface of the air inlet panel (1) is provided with a guide assembly (12). The guide assembly (12) includes a sliding seat (121) and a sliding block (122). The sliding block (122) is provided on the rear side wall surface of the air inlet panel (1) and is slidingly connected to the sliding seat (121). The drive rack (33) is connected to the sliding block (122). The first connecting piece (13) is connected to the sliding block (122), and the second connecting piece (21) is provided on the movable panel (2). The air inlet panel (1) is provided with a guide groove (14), and the connecting part of the second connecting piece (21) passes through the guide groove (14) and is connected to the connecting part of the first connecting piece (13).

5. The control method of the range hood with an adjustable air suction port according to claim 3, wherein In step S2, the main control module calculates the arc length that the drive gear (32) needs to rotate according to the height (H2-H1), and then calculates the number of revolutions that the drive motor (31) needs to rotate through the transmission ratio, and sends a control signal to the drive motor (31). During the startup of the drive motor (31), the Hall sensor detects the number of revolutions of the output shaft of the drive motor (31) and sends a signal to the main control module, thereby monitoring whether the always-open air suction port is opened to the right position in step S2.

6. The control method of the range hood with an adjustable air suction port according to claim 3, wherein In steps S33, S34, S35, and S42, the main control module determines the state that the always-closed air suction port needs to adjust according to the PM2.5 concentration value, and then controls the air suction port adjusting module (3) to drive the movable panel (2) to switch between the two positions. According to the height that the movable panel (2) needs to move when switching between the two positions, the drive gear (32) is rotated by a corresponding arc length, and then the number of revolutions that the drive motor (31) needs to rotate is calculated through the transmission ratio, and a control signal is sent to the drive motor (31). During the startup of the drive motor (31), the Hall sensor detects the number of revolutions of the output shaft of the drive motor (31) and sends a signal to the main control module, thereby monitoring whether the effective air suction port is adjusted to the appropriate size in steps S33, S34, S35, and S42.

7. The control method of the range hood with an adjustable air suction port according to claim 1, wherein The air quality has a first pollution concentration C1, a second pollution concentration C2, and a third pollution concentration C3, C1 8. The control method of the range hood with an adjustable air suction port according to claim 3, wherein The air suction panel (1) and the movable panel (2) are provided with a movable baffle (6), the movable baffle (6) is in sliding connection with the air suction panel (1), the movable baffle (6) shields part of the air suction port (11) and forms an always-closed air suction port, and the part of the air suction port (11) that is not shielded by the movable baffle (6) always forms an always-open air suction port. In step S2, the air suction port adjusting module (3) drives the movable panel (2) to move alone, and in steps S33 and S34, the air suction port adjusting module (3) drives the movable panel (2) and the movable baffle (6) to move simultaneously.

9. The control method of the range hood with an adjustable air suction port according to claim 8, wherein The air suction panel (1) is provided with a groove (15), the air suction port (11) is arranged in the groove (15), the movable baffle (6) is slidingly connected in the groove (15), the bottom of the groove (15) is provided with an elastic supporting piece (7), the elastic supporting piece (7) supports the movable baffle (6) from the lower end of the movable baffle (6), in steps S33 and S34, the air suction port adjusting module (3) drives the movable panel (2) and the movable baffle (6) to move simultaneously, the movable baffle (6) moves and compresses the elastic supporting piece (7), in steps S35 and S42, the elastic supporting piece (7) resets and drives the movable baffle (6) to move upwards.

10. The control method of the range hood with an adjustable air suction port according to claim 9, wherein The inner side of the movable panel (2) is provided with a linkage (22), the movable baffle (6) is provided with an avoiding groove (61), the linkage (22) extends to the rear side of the air suction panel (1) through the avoiding groove (61), in step S2, the linkage (22) moves along the avoiding groove (61), and the force applying part (211) thereon reaches the lower edge of the avoiding groove (61), in steps S33 and S34, when the air suction port adjusting module (3) drives the movable panel (2) to move, the force applying part (211) drives the movable baffle (6) to move synchronously, in steps S35 and S42, the force applying part (211) moves upwards with the linkage (22), the elastic supporting piece (7) resets and drives the movable baffle (6) to move upwards.

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