CN113237116B - Self-cleaning sensing device of range hood and control method thereof - Google Patents
Self-cleaning sensing device of range hood and control method thereof Download PDFInfo
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- CN113237116B CN113237116B CN202110732022.7A CN202110732022A CN113237116B CN 113237116 B CN113237116 B CN 113237116B CN 202110732022 A CN202110732022 A CN 202110732022A CN 113237116 B CN113237116 B CN 113237116B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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Abstract
The invention discloses a control method of a self-cleaning sensing device of a range hood, which comprises the following steps: s1, testing the inherent frequency and the amplitude of the range hood during initialization, and respectively marking the inherent frequency and the amplitude as f0 and S0; s2, closing the range hood, vibrating the range hood at a specific frequency, detecting the corresponding amplitude of the range hood, recording the specific frequency as f1, and recording the detected amplitude as S1; s3, comparing the modal amplitude data of the S1 and the modal amplitude data of the S0 to obtain the displacement amplitude of the S1; s4, judging whether the displacement amplitude of the S1 meets a preset condition or not; and S5, if yes, cleaning is not needed, and if not, a self-cleaning function is started. The invention provides a self-cleaning control method, which enables a user to find the oil stain condition of a range hood in time and realize automatic cleaning, avoids a series of bad user experiences caused by serious internal oil stain, maintains the good running state of the range hood, and prolongs the service life of the range hood.
Description
Technical Field
The invention relates to the field of range hoods, in particular to a range hood self-cleaning sensing device and a control method thereof.
Background
The range hood is a household appliance frequently used in a kitchen and is responsible for completely sucking kitchen oil smoke and then exhausting the oil smoke into the atmosphere, when the range hood works, a lot of oil smoke can be adhered inside the range hood, too much oil is accumulated on an impeller, an outer wall and the bottom of a fan of the range hood to influence the normal operation of the fan, the motor of the range hood is overloaded, the range hood generates heat, a wire is short-circuited, and a fire disaster is caused by burning the motor.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a self-cleaning sensing device of a range hood and a control method thereof.
The invention is realized by the following technical measures, comprising the following steps: s1, testing the inherent frequency and the amplitude of the range hood during initialization, and respectively marking the inherent frequency and the amplitude as f0 and S0; s2, closing the range hood accumulated with certain oil stains, and starting a detection unit; s3, generating vibration frequency and amplitude detection data with oil stains, and respectively marking the vibration frequency and the amplitude detection data as f1 and S1; s4, comparing the detection data of the S1 with the modal amplitude data of the S0, and judging whether the displacement amplitude of the S1 meets all requirements of the S0; and S5, if the requirements of the step S4 are met, cleaning is not needed, otherwise, a self-cleaning function is started.
As a preferable mode, the natural frequency and the amplitude at least include three-order test values, and the step S1 is specifically: the initialization test for testing the range hood comprises a third-order test value, and the integral data of the natural frequency and the amplitude of the third-order test are respectively marked as f0 and s0.
As a preferable mode, the step S3 is specifically: the range hood with the accumulated oil stains is detected through the detection unit, resonance frequency and amplitude data of the whole range hood are generated after detection, and the three-order frequency and the amplitude data are taken as an array and are respectively marked as f1 and s1.
As a preferable mode, the step S4 is specifically: and (4) comparing the third-order amplitudes of s1 and s0 in stages, and judging that the third-order amplitude of s1 meets all requirements of s0 to be passed.
As a preferable mode, the step S5 is specifically: judging that the oil contamination rate at any stage is greater than or equal to a set threshold value, and then cleaning is not needed; and (3) starting a self-cleaning function when the oil content rate of any stage is less than a set threshold, returning to S2 for verification after cleaning, and judging that cleaning is not needed again after verification.
As a preferred mode, the range hood comprises a range hood body, wherein a detection device, a self-cleaning device and a control panel are arranged in the range hood body, and the control panel is electrically connected with the detection device and the self-cleaning device.
As a preferable mode, the detection device is arranged on a volute of the range hood body and comprises a vibration generator and a vibration displacement sensor.
Preferably, the vibration generator and the vibration displacement sensor are arranged diagonally.
The self-cleaning sensing device of the range hood and the control mode thereof can find the oil stain condition of the range hood in time and realize automatic cleaning, have high intelligent degree and reduce the line burden of the range hood; secondly, the multi-stage resonance frequency is taken, the order change curve is taken, the accuracy of result judgment is improved, and the judgment error is reduced.
Drawings
Fig. 1 is a schematic diagram of three-order natural modes during initialization of a range hood according to an embodiment of the present invention;
FIG. 2 is a schematic operational flow chart of an embodiment of the present invention;
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings.
A self-cleaning sensing device of a range hood and a control method thereof, referring to fig. 1 to 2, comprising the following steps: s1, testing the inherent frequency and the amplitude of the range hood during initialization, and respectively marking the inherent frequency and the amplitude as f0 and S0; s2, closing the range hood, vibrating the range hood at a specific frequency, detecting the corresponding amplitude of the range hood, recording the specific frequency as f1, and recording the detected amplitude as S1; s3, comparing the modal amplitude data of the S1 and the modal amplitude data of the S0 to obtain the displacement amplitude of the S1; s4, judging whether the displacement amplitude of the S1 meets a preset condition or not; s5, if yes, cleaning is not needed, if not, a self-cleaning function is started, when oil stains in the range hood are accumulated more, namely a layer of oil stain layer is added on the surface of the range hood, the thickness of a sheet metal part of the range hood is increased in a phase change manner, and when the thickness of a material is changed, the vibration amplitude of the material can be changed, so that the inherent mode of the range hood is changed, the vibration of the structure is weakened under the original inherent frequency, and the vibration amplitude is reduced; starting the whole machine vibration test of the range hood, applying an external force with a specific frequency and a specific amplitude at the vibration generator, enabling the whole machine of the range hood to vibrate violently at the moment, and monitoring the amplitude at the vibration displacement sensor to obtain the resonant frequency of the first three orders, namely the natural frequency f0 and the amplitude s0. And the multi-stage resonance frequency is adopted during detection, and the order change curve is adjusted, so that the accuracy of result judgment is improved. In an embodiment, referring to fig. 1 and fig. 2, the natural frequency and the amplitude at least include third-order test values, and the step S1 specifically includes: the initialization test for testing the range hood comprises three-order test values, and the integral data of the natural frequency and the amplitude of the three-order test are respectively marked as f0 and s0. Because the range hoods have different structures, weights, sizes, thicknesses and the like, the natural frequencies and the amplitudes of the range hoods of different types are different, and the range hoods have unique natural frequencies F0 and amplitudes S0, wherein the amplitude S0 is generally 0.1mm to 20mm, and the frequency of the F0 can range from dozens of Hz to thousands of Hz according to the difference of the range hoods; in this embodiment, according to the overall structure of the range hood, the natural frequency f0 and the amplitude s0 of the first three orders of the range hood are obtained after the test by the detection unit, and as shown in fig. 1, the data values are stored in the program of the range hood and become fixed reference values.
In an embodiment, referring to fig. 1 and fig. 2, the step S3 specifically includes: the step S2 specifically comprises the following steps: the range hood with the accumulated oil stains is detected through the detection unit, resonance frequency and amplitude data of the whole range hood are generated after detection, and the three-order frequency and the amplitude data are taken as an array and are respectively marked as f1 and s1. After the range hood is used for a certain number of times or oil stains are accumulated to a certain value, the range hood is closed, the detection function is started, the mode of three-order frequency and amplitude is obtained after the detection unit tests, and the numerical values of three groups of frequency and amplitude are used as a group of numerical values to be recorded as f1 and s1.
In an embodiment, referring to fig. 1 and fig. 2, the step S4 specifically includes: and (4) comparing the three-order amplitude steps of s1 and s0, and judging that the three-order amplitude of s1 meets all requirements of s0 to be passed. Step S1 to step S3 are integrated, and the three-order intrinsic modes intercepted from the initial values are compared with the values obtained in step S3 one by one, and in this embodiment, as shown in fig. 2, it is determined whether the thresholds of the three groups S1 are all greater than the intrinsic amplitude value S0, and whether the amplitude value satisfies eighty percent of the original threshold ratio.
In an embodiment, referring to fig. 2, the step S5 specifically includes: judging that the oil content of any step is greater than or equal to a set threshold value, and then cleaning is not needed; and if the oil content rate of any step is less than the set threshold value, starting a self-cleaning function, returning to S2 for verification after cleaning, and judging that the oil is not required to be cleaned again after verification. If the three groups of numerical values are all larger than the inherent amplitude value S0 and meet eighty percent of the original threshold ratio, the detection unit is closed, otherwise, the self-cleaning device is started to clean the range hood, the step S2 is skipped after the cleaning is finished, the detection is carried out again, the cleaned effect is verified, and the accuracy of result judgment is improved.
A self-cleaning sensing device of a range hood comprises a range hood body, wherein a detection device, a self-cleaning device and a control panel are arranged in the range hood body, and the control panel is electrically connected with the detection device and the self-cleaning device. Control panel control detection device examines the greasy dirt volume of range hood, and when detecting out the greasy dirt volume great, its feedback is to the control panel, and the control panel starts from the belt cleaning device work, washs the back that finishes, and the control panel starts detection device once more, until the sanitization.
The detection device is arranged on a volute of the range hood body and comprises a vibration generator and a vibration displacement sensor; the vibration generator and the vibration displacement sensor are arranged in a diagonal line. In this embodiment, a vibration generator is arranged at the left upper side of the volute of the range hood, and can excite vibration with a specific amplitude and a specific frequency according to requirements, the vibration generator further comprises a rotating motor, an eccentric shaft is arranged on the rotating motor, the rotating motor can drive an eccentric shell structure to rotate according to a required rotating speed, and the rotating shell structure is an eccentric structure, so that eccentric vibration can be caused when the rotating eccentric shaft is driven by a direct current brushless motor fixed on the volute to rotate;
the vibration displacement sensor is arranged at the right lower part of the volute of the range hood, so that the vibration amplitude displacement of the range hood can be detected in real time.
The self-cleaning sensing device of range hood and the control method thereof are described above for the understanding of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any changes, modifications, substitutions, combinations and simplifications which do not depart from the principle of the present invention should be replaced by equivalent manners, and all such changes, modifications, substitutions, combinations and simplifications are included in the protection scope of the present invention.
Claims (2)
1. A self-cleaning control method of a range hood is characterized by comprising the following steps:
s1, testing the inherent frequency and the amplitude of the range hood during initialization, and respectively marking the inherent frequency and the amplitude as f0 and S0;
s2, closing the range hood, vibrating the range hood at a specific frequency, detecting the corresponding amplitude of the range hood, recording the specific frequency as f1, and recording the detected amplitude as S1;
s3, comparing the modal amplitude data of the S1 and the modal amplitude data of the S0 to obtain the displacement amplitude of the S1;
s4, judging whether the displacement amplitude of the S1 meets a preset condition or not;
s5, if yes, cleaning is not needed, and if not, a self-cleaning function is started;
the natural frequency and the amplitude at least include three-order test values, and the step S1 specifically includes: the initialization test of the range hood test comprises three-order test values, and the integral data of the inherent frequency and the amplitude of the three-order test are respectively marked as f0 and s0;
the step S2 specifically comprises the following steps: detecting the range hood accumulated with oil stains through a detection unit, generating resonance frequency and amplitude data of the whole range hood after detection, and taking the three-order frequency and amplitude data as an array to be respectively marked as f1 and s1;
the step S4 specifically includes: comparing the three-order amplitudes of s1 and s0 in a step-by-step manner, and judging that the three-order amplitudes of s1 meet all requirements of s0 and then pass the detection;
the step S5 specifically comprises the following steps: judging that the oil content of any step is greater than or equal to a set threshold value, and then cleaning is not needed; and if the oil content rate of any step is less than a set threshold value, starting a self-cleaning function, returning to S2 for verification after cleaning, and judging that cleaning is not needed again after verification.
2. The range hood self-cleaning sensing device adopting the range hood self-cleaning control method according to claim 1, characterized by comprising a range hood body, wherein a detection device, a self-cleaning device and a control panel are arranged in the range hood body, and the control panel is electrically connected with the detection device and the self-cleaning device; the detection device is arranged on a volute of the range hood body and comprises a vibration generator and a vibration displacement sensor; the vibration generator and the vibration displacement sensor are arranged in a diagonal line.
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| CN202110732022.7A CN113237116B (en) | 2021-06-30 | 2021-06-30 | Self-cleaning sensing device of range hood and control method thereof |
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| CN202110732022.7A CN113237116B (en) | 2021-06-30 | 2021-06-30 | Self-cleaning sensing device of range hood and control method thereof |
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| CN113237116B true CN113237116B (en) | 2022-10-14 |
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| CN112361417A (en) * | 2020-12-10 | 2021-02-12 | 珠海格力电器股份有限公司 | Ultrasonic cleaning control method and device for range hood and range hood |
| CN112393306A (en) * | 2020-12-10 | 2021-02-23 | 珠海格力电器股份有限公司 | Oil cup cleaning method and device for range hood and range hood |
| CN112926576A (en) * | 2021-01-26 | 2021-06-08 | 宁波方太厨具有限公司 | Oil smoke concentration detection method and system, electronic equipment and storage medium |
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2021
- 2021-06-30 CN CN202110732022.7A patent/CN113237116B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864432A (en) * | 2015-05-21 | 2015-08-26 | 广东美的厨房电器制造有限公司 | Exhaust hood and cleaning control method thereof |
| CN207555676U (en) * | 2017-09-18 | 2018-06-29 | 宁波方太厨具有限公司 | A kind of automatically cleaning range hood |
| CN209431495U (en) * | 2018-11-27 | 2019-09-24 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator of band self-regulation diameter noise interference device |
| CN111219759A (en) * | 2018-11-27 | 2020-06-02 | 宁波方太厨具有限公司 | Implementation method for cleaning reminding of range hood |
| CN112361417A (en) * | 2020-12-10 | 2021-02-12 | 珠海格力电器股份有限公司 | Ultrasonic cleaning control method and device for range hood and range hood |
| CN112393306A (en) * | 2020-12-10 | 2021-02-23 | 珠海格力电器股份有限公司 | Oil cup cleaning method and device for range hood and range hood |
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