CN114076330B - Range hood, control method thereof and computer readable storage medium - Google Patents

Range hood, control method thereof and computer readable storage medium Download PDF

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Publication number
CN114076330B
CN114076330B CN202010840332.6A CN202010840332A CN114076330B CN 114076330 B CN114076330 B CN 114076330B CN 202010840332 A CN202010840332 A CN 202010840332A CN 114076330 B CN114076330 B CN 114076330B
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CN
China
Prior art keywords
oil smoke
air
concentration
air inlet
smoke concentration
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CN202010840332.6A
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Chinese (zh)
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CN114076330A (en
Inventor
刘智
梁泽锋
何雄明
魏中科
曲绍鹤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Original Assignee
Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
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Priority to CN202010840332.6A priority Critical patent/CN114076330B/en
Publication of CN114076330A publication Critical patent/CN114076330A/en
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Classifications

    • 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
    • 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
    • F24C15/2035—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a range hood, a control method thereof and a computer readable storage medium, wherein the range hood comprises: the air purifying device comprises a smoke machine main body, an air purifying device, a first oil smoke sensor, a second oil smoke sensor and a controller, wherein the controller is electrically connected with the first oil smoke sensor and the second oil smoke sensor respectively; the controller is used for judging whether the filter element fails according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet. According to the technical scheme, whether the filter element of the air purifying device is invalid or not can be judged according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet, so that a user is reminded of timely replacing or cleaning the filter element when the filter element is invalid, and further the phenomenon that oil smoke pollution and health damage to a human body are caused due to the fact that the oil smoke generated by cooking is diffused in a kitchen space when the air purifying device is difficult to effectively purify the oil smoke can be avoided.

Description

Range hood, control method thereof and computer readable storage medium
Technical Field
The invention relates to the technical field of household appliances, in particular to a range hood, a control method thereof and a computer readable storage medium.
Background
During the cooking process, oil smoke is generated, and the oil smoke not only pollutes the air environment, but also damages the health of human bodies. The traditional range hood can discharge the oil smoke to the outside rapidly, so that the pollution to the air environment in the kitchen and the damage to the health of human bodies are reduced. However, during cooking, there is always oil smoke escaping from the conventional range hood and escaping into the kitchen space. The escaped oil smoke can still cause oil smoke pollution and damage to the health of human bodies.
Disclosure of Invention
In order to further reduce the pollution of the oil smoke to the air environment in the kitchen and the damage to the human health, the range hood is additionally provided with an air purifying device on the basis of the main body of the range hood, so that the oil smoke dissipated into the kitchen space is sucked and then purified through the air purifying device. However, as the use time increases, the purifying and filtering efficiency of the air purifying device for the oil smoke gradually decreases, so when the air purifying device is difficult to effectively purify the oil smoke due to the decrease of the purifying and filtering efficiency, the oil smoke generated by cooking is diffused in the kitchen space, and the oil smoke pollution and the health damage to the human body are caused.
In order to achieve the above object, the present invention provides a range hood comprising:
a tobacco machine main body; and
the air purifying device is provided with a purifying air duct and a filtering piece arranged in the purifying air duct;
the outer surface of the cigarette machine main body is provided with an air inlet communicated with the purification air duct and an air outlet communicated with the purification air duct;
the first oil smoke sensor is used for detecting the oil smoke concentration of the air inlet;
the second oil smoke sensor is used for detecting the oil smoke concentration of the air outlet;
the controller is electrically connected with the first oil smoke sensor and the second oil smoke sensor respectively;
the controller is used for judging whether the filter element fails according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet.
On one hand, the air purifying device and the main body of the smoke machine cooperate to discharge most of the oil smoke outdoors, and the small part of the oil smoke is circularly purified and removed, so that the pollution of the oil smoke to the air environment and the damage to the health of human bodies are further reduced; on the other hand has still add first oil smoke sensor, second oil smoke sensor and controller, can judge whether air purification device's filter element inefficacy according to the oil smoke concentration of air intake and the oil smoke concentration of air outlet to remind the user in time to change or clean the filter element when the filter element inefficacy.
Optionally, when the air purification device is in a stop state, the controller acquires the first air inlet oil smoke concentration of the air inlet;
the controller controls the air purifying device to be started, and obtains the first air outlet oil smoke concentration of the air outlet;
the controller judges whether the filter element fails or not based on the first air outlet oil smoke concentration and the first air inlet oil smoke concentration.
The concentration of the oil smoke before and after purification and filtration is carried out by the air purification device, and whether the filtration piece fails or not is accurately judged.
Optionally, the controller determines a first oil smoke ratio between a first air-out oil smoke concentration and a first air-in oil smoke concentration; and if the first oil smoke proportion is greater than or equal to the preset oil smoke proportion, the controller judges that the filter element fails.
And the air purifying device is used for purifying and filtering the oil smoke proportion corresponding to the oil smoke concentration before and after filtration, so as to accurately judge whether the filtering piece is invalid.
Optionally, if the first oil smoke ratio is greater than or equal to a preset oil smoke ratio and the opening duration of the air purification device reaches a first preset duration, the controller obtains a second air inlet oil smoke concentration of the air inlet and a second air outlet oil smoke concentration of the air outlet;
And if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, the controller judges that the filter element fails.
Whether the filter element fails or not is judged according to the oil smoke proportion after the air purifying device is started for a period of time, and the accuracy of judging the failure of the filter element is improved.
Optionally, if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, the controller determines a third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet in real time within a second preset time period after the current moment;
and if the third oil smoke proportion in the second preset time period does not have the oil smoke proportion smaller than the preset oil smoke proportion, the controller judges that the filter element is invalid.
Judging whether the filter element fails or not according to the oil smoke proportion in a second preset time period after the air purifying device is started for a period of time, and improving the accuracy of judging the failure of the filter element.
Optionally, the main body of the cigarette machine comprises a decoration cover and a smoke collecting cover arranged below the decoration cover;
the first oil smoke sensor is arranged at the air inlet; or alternatively, the process may be performed,
The first oil smoke sensor is arranged on the side face of the fume collecting hood; or alternatively, the process may be performed,
the first oil smoke sensor is arranged at the upper end of the decorative cover.
The first oil smoke sensor is arranged on the side surface of the air inlet and the fume collecting hood or the upper end of the decorative hood, so that the first oil smoke sensor can accurately obtain the oil smoke concentration corresponding to the air inlet.
Optionally, the main body of the cigarette machine comprises a decoration cover and a smoke collecting cover arranged below the decoration cover;
the second oil smoke sensor is arranged at the air outlet; or alternatively, the process may be performed,
the second oil smoke sensor is arranged at a position, close to the air outlet, in the decorative cover; or alternatively, the process may be performed,
the second oil smoke sensor is arranged at a position, close to the air outlet, in the fume collecting hood.
The second oil smoke sensor is arranged at the air outlet, the position in the decoration cover, which is close to the air outlet, or the position in the fume collecting hood, which is close to the air outlet, so that the second oil smoke sensor can accurately obtain the oil smoke concentration corresponding to the air outlet.
The invention also provides a control method of the range hood, which is applied to the range hood and comprises the following steps:
and judging whether the filter element of the air purifying device fails or not according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet.
Judging whether the filter element of the air purifying device fails according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet so as to remind a user to replace or clean the filter element in time when the filter element fails.
Optionally, the step of judging whether the filter element of the air purifying device fails according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet includes:
when the air purification device is in a stop state, acquiring the first air inlet oil smoke concentration of the air inlet;
controlling the air purification device to be started, and obtaining the first outlet air oil smoke concentration of the air outlet; and
and judging whether the filter element is invalid or not based on the first air outlet oil smoke concentration and the first air inlet oil smoke concentration.
The concentration of the oil smoke before and after purification and filtration is carried out by the air purification device, and whether the filtration piece fails or not is accurately judged.
Optionally, the step of judging whether the filter element fails based on the first outlet air oil fume concentration and the first inlet air oil fume concentration includes:
determining a first oil smoke ratio between the first air-out oil smoke concentration and the first air-in oil smoke concentration; and
and if the first oil smoke ratio is greater than or equal to the preset oil smoke ratio, judging that the filter element fails.
And the air purifying device is used for purifying and filtering the oil smoke proportion corresponding to the oil smoke concentration before and after filtration, so as to accurately judge whether the filtering piece is invalid.
Optionally, if the first oil smoke ratio is greater than or equal to a preset oil smoke ratio, the step of determining that the filter element fails includes:
if the first oil smoke proportion is greater than or equal to a preset oil smoke proportion and the opening time of the air purification device reaches a first preset time, acquiring the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet; and
and if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, judging that the filter element fails.
Whether the filter element fails or not is judged according to the oil smoke proportion after the air purifying device is started for a period of time, and the accuracy of judging the failure of the filter element is improved.
Optionally, if the second oil smoke ratio between the second air-out oil smoke concentration and the second air-in oil smoke concentration is greater than or equal to a preset oil smoke ratio, the step of determining that the filter element fails includes:
if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is larger than or equal to the preset oil smoke ratio, determining a third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet in real time within a second preset time period after the current moment; and
And if the oil smoke proportion smaller than the preset oil smoke proportion does not exist in the third oil smoke proportion in the second preset time period, judging that the filter element is invalid.
Judging whether the filter element fails or not according to the oil smoke proportion in a second preset time period after the air purifying device is started for a period of time, and improving the accuracy of judging the failure of the filter element.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with a control program of the range hood, and the control program of the range hood realizes the steps of the control method of the range hood when being executed by a processor.
On the one hand, the range hood of the technical scheme is additionally provided with the air purifying device on the basis of the main body of the range hood, so that most of the oil smoke generated in the cooking process can be discharged outdoors through the oil smoke suction duct when the air purifying device and the main body of the range hood work cooperatively, and a small part of the oil smoke can escape to other spaces in a kitchen, and the small part of the oil smoke can be further removed through the purifying duct, so that the pollution of the oil smoke to the air environment and the damage to the health of a human body are further reduced; on the other hand has still add first oil smoke sensor, second oil smoke sensor and controller, can acquire the oil smoke concentration of air intake and the oil smoke concentration of air outlet through first oil smoke sensor and second oil smoke sensor, and judge whether air purification device's filter is inefficacy according to the oil smoke concentration of air intake and the oil smoke concentration of air outlet, in order to remind the user in time to change or clean filter when filter inefficacy, for example, the prompt message of filter is changed in the output, and then can avoid air purification device to be difficult to carry out effectual purification to the oil smoke when, lead to the produced oil smoke of culinary art to spread in the kitchen space, and cause the phenomenon of oil smoke pollution and harm to human health.
Drawings
Fig. 1 is a schematic view of a view angle of an embodiment of a range hood according to the present invention;
fig. 2 is a schematic view of a range hood according to another embodiment of the present invention;
fig. 3 is a schematic view of the range hood of fig. 1 after removing the decorative cover and the filter;
fig. 4 is an exploded view of the range hood of fig. 1;
FIG. 5 is an enlarged schematic view of FIG. 4 at A;
fig. 6 is a schematic view of a part of a cross-sectional structure of the range hood of fig. 1 from another view angle;
FIG. 7 is an enlarged schematic view at B in FIG. 6;
fig. 8 is a schematic view of a part of a cross-sectional structure of the range hood of fig. 1 from another view angle;
FIG. 9 is an enlarged schematic view of FIG. 8 at C;
fig. 10 is a schematic view of an air circulation path of the range hood of fig. 1;
fig. 11 is a flowchart of a control method of a range hood according to a first embodiment of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present invention, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a range hood.
Referring to fig. 1 to 4, in an embodiment of the present invention, the range hood includes:
a tobacco machine main body 1; and
the air purifying device 2 is provided with a purifying air duct and a filter piece 22 arranged in the purifying air duct;
the outer surface of the smoke machine main body 1 is provided with an air inlet 111 communicated with the purification air duct and an air outlet 112 communicated with the purification air duct;
a first fume sensor 4 for detecting the fume concentration of the air inlet 111;
a second fume sensor 5 for detecting the fume concentration of the air outlet 112;
the controller 3 is electrically connected with the first oil smoke sensor 4 and the second oil smoke sensor 5 respectively;
the controller 3 is configured to determine whether the filter 22 fails according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet.
In this embodiment, the range hood main body 1 is provided with an oil fume suction duct, the purification duct of the air purification device 2 is not communicated with the oil fume suction duct, and a purification fan 23 is arranged in the purification duct. The smoke inlet of the oil smoke suction duct is communicated with the indoor and is generally suspended above a kitchen range so as to suck the oil smoke into the oil smoke suction duct; the smoke outlet of the oil smoke suction air duct is communicated with the outside of the room to discharge the oil smoke to the outside of the room; of course, the fume exhaust duct is internally provided with a fume exhaust fan for enabling air flow to flow from the fume inlet to the fume outlet. It will be appreciated that the range hood body 1 has the function of a conventional range hood.
The purifying fan 23 of the air purifying device 2 is configured to make the air flow from the air inlet 111 to the air outlet 112 via the purifying air duct. The air inlet 111 and the air outlet 112 are both communicated with the room, the air inlet 111 is used for sucking air in the kitchen, the filter 22 of the air purifying device 2 is used for filtering and purifying the sucked air, and the air outlet 112 is used for discharging the filtered and purified air back into the kitchen. When the air purification device 2 and the range hood main body 1 work cooperatively, most of the oil smoke generated in the cooking process is discharged outdoors through the oil smoke suction duct, a small part of the oil smoke can escape to other spaces in a kitchen, and the small part of the oil smoke can be further removed through the purification duct of the air purification device 2, so that the pollution of the oil smoke to the air environment and the damage to the health of a human body are further reduced.
In addition, in this embodiment, the range hood is further provided with a first oil smoke sensor 4, a second oil smoke sensor 5 and a controller 3, the controller 3 can obtain the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet corresponding to the kitchen space through the first oil smoke sensor 4 and the second oil smoke sensor 5, and judge whether the filter element is invalid or not according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet, namely judge whether the filter element 22 can effectively filter and purify the oil smoke; so as to remind the user to change or clean the filter element in time when the filter element fails, for example, the prompt message of changing the filter element is output, so as to avoid the phenomenon that the oil smoke pollution and the health damage to human body are caused when the purifying and filtering efficiency of the oil smoke is gradually reduced by the air purifying device and the oil smoke is difficult to effectively purify the oil smoke, and the oil smoke generated by cooking is diffused in the kitchen space.
Optionally, the range hood body 1 comprises a decoration cover 11 and a fume collecting hood 12 arranged below the decoration cover 11, an oil fume suction duct is arranged in the decoration cover 11, and the oil fume suction duct is not communicated with the purification duct. The air purifying device 2 is provided in the decorative cover 11, and in this embodiment, the air purifying device 2 is hidden in the decorative cover 11 to share an exterior member, thereby simplifying the structure of the range hood.
However, in other embodiments, referring to fig. 4, the air purifying device 2 may be disposed outside the main body 1 of the cigarette machine, for example, but not limited to, being fixed to the front surface of the decorative cover 11. In still other embodiments, the air purifying device 2 may be mounted independently of the cigarette machine body 1, i.e. the air purifying device 2 is movable relative to the cigarette machine body 1, at this time, the air purifying device 2 may be connected to the cigarette machine body 1 through a power supply line to be supplied by the cigarette machine body 1, or the air purifying device 2 may be provided with a plug-in device, and may be supplied by a separate plug-in device.
Optionally, referring to fig. 1, the controller 3 is fixedly arranged on the main body 1 of the smoke machine; it will be appreciated that the range body 1 is generally larger in size than the air cleaning device 2, with more and more convenient locations and space for mounting the controller 3. The controller 3 is usually connected with the lampblack fan of the main body 1 of the cigarette machine and the purifying fan of the air purifying device 2 in a communication way in a wired way so as to send an opening signal and a stopping signal to the main body 1 of the cigarette machine and the air purifying device 2; of course, the controller 3 may also be in communication connection with the smoke ventilator of the main body 1 and the purifying fan of the air purifying device 2 in a wireless manner, and in particular, in a technical solution in which the air purifying device 2 is movable relative to the main body 1, the controller 3 is generally in wireless communication connection with the purifying fan of the air purifying device 2.
Optionally, referring to fig. 2, the first oil smoke sensor 4 is disposed at the air inlet 111 of the air purifying device 2, so that the first oil smoke sensor 4 is used for monitoring the oil smoke concentration before the air purifying device 2 filters, so as to be beneficial to sensing the escape and diffusion of cooking oil smoke through the first oil smoke sensor 4, and timely judging whether the filter element of the air purifying device 2 fails.
In one embodiment, the first smoke sensor 4 is provided to the range body 1. Since the controller 3 is usually provided on the main body 1 of the range hood, the first smoke sensor 4 is also provided on the main body 1 of the range hood, and the electric connection between the first smoke sensor and the controller 3 can be more conveniently realized. In addition, the range hood body 1 is generally larger than the air cleaning device 2, with more and more suitable mounting locations for the first smoke sensor.
However, the present design is not limited thereto, and in other embodiments, the first smoke sensor 4 may be further disposed on the side of the smoke collecting hood 12, so that the concentration of the smoke leaking from the side of the main body 1 of the smoke machine is obtained; particularly, when a kitchen range with a double burner is arranged below the range hood, the oil smoke generated during cooking is easy to escape from the side direction of the range hood main body 1, and the first oil smoke sensor 4 is arranged on the side surface of the fume collecting hood 12, so that the escape and diffusion of the cooking oil smoke can be perceived more quickly, and whether the filter element of the air purifying device 2 fails or not can be judged timely.
In some other embodiments, the first smoke sensor 4 may also be disposed at the upper end of the decorative cover 11. It will be appreciated that due to the thermal plume effect of cooking fumes, the cooking fumes will tend to escape upwards and accumulate in the space above the kitchen; the upper end of the decoration cover 11 is closest to the upper space of the kitchen, and the first oil smoke sensor 4 is arranged at the upper end of the decoration cover 11, so that the oil smoke sensor 4 is beneficial to acquiring the oil smoke concentration of the upper space of the kitchen, the oil smoke concentration can more truly reflect the total air quality of the kitchen, and whether the filter element of the air purifying device 2 fails or not can be judged in time.
In an embodiment, the second oil smoke sensor 5 is disposed at the air outlet 112 of the air purifying device 2, so that the second oil smoke sensor 5 is used for monitoring the oil smoke concentration of the air purifying device 2 after filtering, thereby being beneficial to sensing the cooking oil smoke after filtering by the second oil smoke sensor 5 and timely judging whether the filter element of the air purifying device 2 fails.
In one embodiment, the second smoke sensor 5 is provided to the range body 1. Since the controller 3 is usually provided on the range hood body 1, and the second smoke sensor 5 is also provided on the range hood body 1, it is possible to more conveniently electrically connect the range hood body 1 and the controller 3. In addition, the range hood body 1 is generally larger than the air cleaning device 2, with more and more suitable mounting locations for the second smoke sensor.
However, the present design is not limited thereto, and in other embodiments, the second smoke sensor 5 may be further disposed at a position in the smoke collecting hood 12 near the air outlet 112, for example, the second smoke sensor 5 is disposed at a position in the top of the smoke collecting hood 12 near the air outlet 112, so as to be beneficial to obtaining the smoke concentration after filtering the air purifying device 2, and timely judging whether the filter of the air purifying device 2 is invalid.
In some other embodiments, the second smoke sensor 5 may also be disposed in the decorative cover 11 near the air outlet 112, for example, the second smoke sensor 5 is disposed in the front surface of the decorative cover 11 near the air outlet 112, so as to be beneficial to obtaining the smoke concentration after filtering the air purifying device 2, and timely judging whether the filter of the air purifying device 2 is invalid. Optionally, the second oil smoke sensor 5 is arranged on the front surface of the fume collecting hood 12 of the fume extractor body 1, the control panel of the fume extractor is usually arranged on the front surface of the fume collecting hood 12, and the second oil smoke sensor 5 is integrated on the control panel, so that the assembly process can be reduced.
Optionally, the air inlet 111 is disposed on a side surface of the decorative cover 11, so as to facilitate sucking the oil smoke escaping to the side of the range hood into the purifying air duct, so as to reduce the oil smoke on the side of the range hood; in particular, when a range with a double burner is used below the range hood, the cooking fumes generated during cooking are easy to escape from the side direction of the range hood, and the air inlet 111 provided at the side of the decorative cover 11 is more advantageous for sucking the cooking fumes.
Optionally, the two opposite sides of the decorative cover 11 are respectively provided with the air inlet 111 to reduce the oil smoke on two sides of the range hood. Of course, the air inlet 111 may be provided only on one of the two side surfaces of the decorative cover 11. Optionally, an air inlet grille is disposed on the air inlet 111 to prevent hands and other foreign objects from extending into the decorative cover 11.
Optionally, two filter elements 22 are provided, and each filter element 22 is disposed near one air inlet 111; thus, as soon as the air with the oil smoke enters the purifying air duct, the filtering piece 22 can be used for filtering, and the probability of polluting other devices in the purifying air duct with the oil smoke is reduced. However, the present design is not limited thereto, and in other embodiments, only one filter 22 may be disposed near the air outlet 112, so that the fume in the air can be purified and then discharged.
In this embodiment, the air inlet 111 is disposed on a side surface of the decorative cover 11; however, the present design is not limited thereto, and in other embodiments, the air inlet 111 may be disposed on the front upper portion of the decorative cover 11 or on the top of the main body 1 of the kitchen ventilator, so as to facilitate sucking the oil smoke accumulated in the upper space of the kitchen due to the thermal plume effect, thereby facilitating the air circulation and purification of the whole space of the kitchen. When the air inlet 111 is provided at the top of the main body 1, it is usually provided on a top plate of the main body 1 connected to the decorative cover 11; of course, in some other embodiments, the air inlet 111 may be provided on a wider top flange of the trim cover 11 when the top bend is provided with such a flange.
Alternatively, the hood fan of the hood body 1 and the purifying fan 23 of the air purifying device 2 are connected to the same controller 3, that is, the hood controls the hood body 1 and the air purifying device 2 through the same controller 3. However, the present design is not limited thereto, and in other embodiments, the range hood may be provided with two different controllers 3 to control the range hood fan of the main body 1 and the purifying fan 23 of the air purifying device 2 respectively.
Optionally, the oil smoke fan of the smoke machine main body 1 and the purifying fan 23 of the air purifying device 2 share a control switch, so when the oil smoke fan of the smoke machine main body 1 is opened to work through the control switch, the purifying fan 23 of the air purifying device 2 is automatically opened to work at the same time, that is, the cooperative work of opening the smoke machine main body 1 and the air purifying device 2 by one key can be realized. The control switch is typically electrically connected to the controller 3 to effect control of the on and off. The control switch is typically provided on the hood 12. However, the present design is not limited to this, and in other embodiments, the lampblack fan of the main body 1 and the purifying fan 23 of the air purifying device 2 may also use different control switches, so as to realize the independent on-off control of the main body 1 and the purifying device 2, so that the user can use the lampblack exhausting function and the air purifying function of the lampblack absorber more flexibly.
Referring to fig. 1 to 4, in one embodiment, the air outlet 112 is provided on the front surface of the decorative cover 11; in this way, after the purge fan 23 of the air purge device 2 is turned on, the air outlet 112 is blown forward or at least has a forward air outlet component. During cooking, a user typically stands in front of the range hood, and the space in front of the range hood may be defined as the user's breathing zone. It can be understood that the purified air is conveyed to the user breathing zone by the forward air outlet, so that the air quality of the user breathing zone is improved, the probability of sucking oil smoke by a user can be further reduced, and the damage of the oil smoke to the health of the user is reduced.
Optionally, the air outlet 112 is located at the lower part of the decorative cover 11; it will be appreciated that the lower portion of the decorative cover 11 is closer to the user's breathing zone, more advantageously delivering purified air to the user's breathing zone.
However, the design is not limited thereto, and in other embodiments, the air outlet 112 may be provided at the top of the main body 1 of the kitchen ventilator, so as to facilitate pushing down the oil smoke accumulated in the upper space of the kitchen to be sucked and purified by the air purifying device 2, so that the oil smoke in the upper half of the kitchen space is introduced into the air circulation purification, and the oil smoke in the kitchen is further reduced; similarly, the air outlet 112 is usually provided on the top plate of the main body 1 of the cigarette machine connected to the decorative cover 11, and of course, when the top of the decorative cover 11 is bent to provide a wider top edge, the air inlet 111 may be provided on the top edge.
In other embodiments, the air outlet 112 may be provided on the side of the decorative cover 11 or on the bottom of the main body 1 of the cigarette machine, so that the purified air can be exhausted. When the air outlet 112 is provided at the bottom of the main body 1 of the smoke collecting hood 12, it is usually provided at the bottom of the main body; it will be appreciated that the purge air duct is now also partially disposed within the hood 12. Optionally, the air outlet 112 may have an adjustable air outlet direction; thus, the air outlet direction can be changed to meet more air outlet demands of the user on the air outlet 112, for example, to meet direct blowing or non-direct blowing demands of users with different heights.
Referring to fig. 6 and fig. 7 together, optionally, the air purifying device 2 further includes a wind guiding blade 100, and the wind guiding blade 100 is rotatably disposed at the air outlet 112, so as to adjust the air outlet direction of the air outlet 112 by rotating the wind guiding blade 100, and the air outlet direction of the air outlet 112 is continuously adjustable. However, the present design is not limited thereto, and in other embodiments, an air guiding frame for fixing the air guiding blades 100 may be installed on the air outlet 112, and a plurality of air guiding frames are configured, the inclination angles of the air guiding blades 100 of different air guiding frames are different, and the air outlet direction of the air outlet 112 may be changed by changing different air guiding frames.
When the air outlet 112 is disposed on the front surface of the decorative cover 11, for the rotatable technical scheme of the air guide blade 100, optionally, the air guide blade 100 extends along the transverse direction, and the included angle between the air guide blade 100 and the horizontal plane is in the range of-90 ° to 90 ° during the rotation of the air guide blade 100; it can be understood that when the included angle between the wind guiding blade 100 and the horizontal plane is smaller than zero, the wind guiding blade 100 is inclined towards the lower wind guiding direction, and when the included angle between the wind guiding blade 100 and the horizontal plane is larger than or equal to zero, the wind guiding blade 100 is inclined towards the upper wind guiding direction; in the present embodiment, the air guiding direction of the air guiding blade 100 can be continuously adjustable from nearly vertical downward to nearly vertical upward.
Further alternatively, the included angle between the air guiding blade 100 and the horizontal plane ranges from-45 ° to 45 °, and under the included angle range, the air guiding direction of the air guiding blade 100 can ensure a larger ventilation rate of the air outlet 112 while considering the breathing area of the user and the oil smoke accumulation area at the front upper part of the range hood; it can be appreciated that the wind resistance generated by the wind turbine blade 100 is greater as the angle between the wind turbine blade 100 and the horizontal plane is closer to-90 ° or 90 °.
In addition, in other embodiments, the angle between the wind guiding blade 100 and the horizontal plane may be in the range of 30 ° to 75 °. It will be appreciated that, in this range of rotation, the air guide vanes 100 extend obliquely upward, so that the air blown from the air outlet 112 is mainly conveyed in an obliquely upward direction, so as to have a larger upward air outlet component, and the upward air outlet component can push the oil smoke in the upper half of the kitchen space to flow downward, so as to be sucked and purified by the air inlet 111, thereby incorporating the oil smoke in the upper half of the kitchen space into the air circulation purification (as shown in fig. 10), and further reducing the oil smoke in the kitchen.
In the cooking process, edible oil and food undergo a series of chemical reactions such as oxidation, cracking, polymerization and the like at high temperature, a large amount of organic smoke is evaporated, and part of decomposed substances are dispersed into air in the form of oil mist to form oil smoke. The oil fume includes edible oil and its heated decomposed or cracked product, and includes the products of physical and chemical reaction of protein, polymer and other seasoning in food, and is one kind of matter in gas, liquid and solid state. Generally, the definition is that particulate matter emissions (Particulate Matter Emissions) consisting of liquid and solid in fume emissions are abbreviated as PME, volatile organic compounds (Volatile Organic Compounds Emissions) are emitted, and the particulate matter emissions are abbreviated as VOCs, and fume is composed of the two substances.
In one embodiment, filter 22 includes HEPA filter mesh 221 (high efficiency air filter mesh) and activated carbon filter mesh 222 (see FIG. 4). The HEPA filter screen 221 is mainly used for filtering particulate matters (liquid and solid) in the oil smoke, and the materials of the HEPA filter screen can comprise PP filter paper (polypropylene filter paper), glass fiber, PTFE filter paper (polytetrafluoroethylene filter paper), nanofiber, melt-blown polyester non-woven fabric and the like, and the HEPA filter screen has the characteristics of large dust holding capacity and high filtering precision, can filter the particulate matters of the oil smoke with the filtering efficiency of more than 90 percent, and can be processed into required sizes and shapes according to model requirements. The activated carbon filter screen 222 is mainly used for filtering volatile organic compounds (smell) in the oil smoke, and the material thereof can include activated carbon fiber, activated carbon particles, etc., and the activated carbon material can be coconut shell, fruit shell, coal carbon, etc., which has a larger specific surface area, or the activated carbon material can be molecular sieve material, which has a better adsorption effect. Optionally, the HEPA filter 221 is located upstream of the activated carbon filter 222 in the airflow direction, so that particles in the oil smoke can be prevented from adhering to the activated carbon filter 222, thereby prolonging the service life of the activated carbon filter 222.
Optionally, the filter 22 is located upstream of the purge fan 23 in the direction of the air flow; therefore, the air flow passing through the purifying fan 23 is the purified air flow, the oil smoke is prevented from accumulating on the purifying fan 23, and the service life of the purifying fan 23 is prolonged.
Referring to fig. 1 to 5, 8 and 9, in one embodiment, the decorative cover 11 is provided with a filter mounting port 113, and the filter 22 is detachably provided in the purge duct through the filter mounting port 113; in this manner, removal, cleaning, or replacement of the filter element 22 may be facilitated. It will be appreciated that the filter element 22 typically has a life, for example, the HEPA filter 221 used in the present solution is designed to have a service life of typically more than 1 month, and needs to be replaced after its service life has arrived to ensure that the air cleaning device 2 has good cleaning capability, and in addition, it is removed periodically or aperiodically for cleaning or cleaning, which is beneficial for extending its service life.
Optionally, the filter cover 24 is disposed on the filter mounting port 113; thus, after the filter 22 is installed into the purification air duct from the filter installation opening 113, the filter cover 24 is covered on the filter installation opening 113, so that the filter 22 can be prevented from shaking out, the structural stability of the product is improved, and foreign matters and the like can be prevented from entering the purification air duct from the filter installation opening 113.
Optionally, the air purifying device 2 further includes a purifying housing 21 disposed in the decorative cover 11, and the purifying air duct is at least partially defined by the purifying housing 21, and the purifying housing 21 is provided with an air inlet 211 communicating with the air inlet 111, and an air outlet 212 communicating with the air outlet 112. It can be understood that the independent purifying shell 21 is arranged, so that the purifying air duct can be more accurately limited, the trend of the purifying air flow can be accurately guided, the purifying efficiency is improved, and in addition, the purifying shell 21 can more conveniently attach the filtering piece 22 and the purifying fan 23; however, the present design is not limited thereto, and in other embodiments, a partition member may be simply provided in the decorative cover 11 to isolate the purge air duct. Without loss of generality, the purifying housing 21 is provided with a mounting port 213 corresponding to the filter mounting port 113, and the filter 22 is detachably connected with the purifying housing 21 through the filter mounting port 113 and the mounting port 213.
In the present embodiment, the filter cover 24 provided at the filter mounting port 113 is connected to the purge housing 21. However, the present design is not limited thereto, and in other embodiments, the filter cover 24 may be connected to the decorative cover 11. In addition, in the present embodiment, alternatively, one side of the filter cover 24 is rotatably connected to the purge housing 21, and the other side is detachably connected to the purge housing 21; in this way, after opening the filter cover 24, the filter cover 24 remains attached to the purge housing 21, preventing the filter cover 24 from being lost. Further alternatively, the other side of the filter cover 24 may be connected to the purification housing 21 by, but not limited to, a push-button switch assembly, so that the filter cover 24 may be conveniently opened and closed by being pushed, and the operation is convenient.
Optionally, the filter element 22 is retractably provided to the purge housing 21; it will be appreciated that removal, cleaning or replacement of the filter element 22 can be more conveniently performed by pulling. Optionally, a guide rail 216 extending toward the mounting opening 213 is provided in the purge housing 21, and the filter element 22 is fitted into the purge housing 21 along the guide rail 216; the guide rail 216 has good guiding and installing effects, and can facilitate the realization of the drawable disassembly and assembly of the filter element 22.
Referring to fig. 3 to 7, in an embodiment, the range hood body 1 further includes a fan cover 13 disposed in the decorative cover 11, the fume exhaust duct is at least partially defined by the fan cover 13, and the purification housing 21 is disposed on a front surface of the fan cover 13. In this embodiment, the purifying casing 21 is located on the front surface of the fan cover 13, so that the purifying casing 21 is located closer to the air outlet 112 on the decorative cover 11, thereby shortening the distance between the purifying casing 21 and the air outlet 112, facilitating the communication between the air outlet through-hole 212 on the purifying casing 21 and the air outlet 112, and making the wind speed of the purified air blown out from the air outlet 112 larger and the air supply farther. Optionally, the purifying shell 21 is detachably connected to the front surface of the fan housing 13, that is, the purifying shell 21 is attached to the fan housing 13 for installation, and compared with the technical scheme that the purifying shell 21 is attached to the decorative housing 11 for installation, the technical scheme can reduce the deformation probability of the decorative housing 11, and meanwhile, the detachable installation of the purifying shell 21 can facilitate the replacement of the internal devices thereof.
Optionally, the purifying fan 23 is a centrifugal fan, on one hand, the air volume of the centrifugal fan is larger, and the noise is smaller, so that the far-distance air supply can be realized under the low noise; on the other hand, the centrifugal fan has the function of changing the wind direction (axial air inlet and radial air outlet), and is beneficial to realizing the air inlet at two sides and the air outlet at the front.
Further, a centrifugal volute 214 for installing a centrifugal fan is arranged in the purifying housing 21, an air outlet side of the centrifugal volute 214 is downward and is bent forward, and an air guide section 215 is extended, and the air guide section 215 is extended to a position connected with the air outlet 112. It will be appreciated that the end of the air guiding section 215 remote from the centrifugal volute 214 is provided with the air outlet port 212. In this embodiment, by the arrangement of the air guiding section 215 that is bent and extended, the forward air supply can be realized under the condition that the axial direction of the centrifugal fan is vertical or nearly vertical to the fan cover 13, and at this time, the installation space of the centrifugal fan in the front-rear direction is smaller. It will be appreciated that if the radial direction of the centrifugal fan is perpendicular or nearly perpendicular to the fan housing 13, the installation space in the fore-and-aft direction required for the centrifugal fan is large because the diameter of the centrifugal fan is generally greater than or equal to the axial thickness of the centrifugal fan. Optionally, the centrifugal volute 214 includes a volute body and a volute cover that are spliced together to facilitate loading of the centrifugal fan into the centrifugal volute 214.
Further, when the air purification device 2 is in a stop state, the controller 3 obtains the first air inlet oil smoke concentration of the air inlet 111 so as to obtain the oil smoke concentration in the kitchen before the air purification device 2 is started; the controller 3 controls the air purification device 2 to be started, and obtains the first outlet air oil smoke concentration of the air outlet 112 so as to obtain the oil smoke concentration purified by the air purification device 2 when the air purification device 2 is started; the controller 3 then determines whether the filter 22 is out of order based on the first outlet air soot concentration and the first inlet air soot concentration. The concentration of the oil smoke before and after the purification and filtration of the air purification device 2 is used for accurately judging whether the filter piece 22 is invalid so as to remind a user of timely replacing or cleaning the filter piece when the filter piece 22 is invalid, for example, the prompting information of replacing the filter piece is output, so that the phenomenon that the oil smoke generated by cooking is diffused in a kitchen space to cause oil smoke pollution and health damage to a human body when the air purification device 2 is difficult to effectively purify the oil smoke is avoided.
Optionally, the controller 3 determines a first oil smoke ratio between the first air-out oil smoke concentration and the first air-in oil smoke concentration; if the first oil smoke ratio is greater than or equal to the preset oil smoke ratio, the purification and filtration efficiency of the current air purification device 2 is poor, the oil smoke in the kitchen space cannot be effectively purified through the air purification device 2, the controller 3 judges that the filter element is invalid, and further accurately judges whether the filter element 22 is invalid according to the oil smoke concentration before and after the purification and filtration of the air purification device 2, wherein the preset oil smoke ratio can be reasonably set, for example, the preset oil smoke ratio is 40% and 50%, and the first oil smoke ratio is the first air outlet oil smoke concentration divided by the first air inlet oil smoke concentration.
Optionally, if the first oil smoke ratio is greater than or equal to the preset oil smoke ratio and the opening duration of the air purification device 2 reaches the first preset duration, the controller 3 obtains the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet; if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, the controller 3 judges that the filter element fails.
By accumulating the current opening time of the air purification device 2 when the first oil smoke ratio is greater than or equal to the preset oil smoke ratio, that is, the purification and filtration efficiency of the air purification device 2 is poor, if the opening time reaches the first preset time, the controller 3 acquires the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet again, calculates the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration, and is the second air outlet oil smoke concentration divided by the second air inlet oil smoke concentration, if the second oil smoke ratio is greater than or equal to the preset oil smoke ratio, the purification and filtration of the current air purification device 2 is not improved, and the oil smoke in the kitchen space cannot be effectively purified by the air purification device 2, and the controller 3 determines that the filter element is invalid. In other embodiments, the controller 3 outputs a prompt message for replacing the filter element, so as to remind a user to replace or clean the filter element in time, so as to avoid the phenomenon that when the air purifying device 2 is difficult to effectively purify the oil smoke, the oil smoke generated by cooking is diffused in the kitchen space, and the oil smoke pollution and the damage to the health of a human body are caused. The first preset duration may be set reasonably, for example, the first preset duration is 5 minutes, etc.
Optionally, if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, the controller 3 determines a third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet in real time within a second preset time period after the current moment; if the third oil smoke proportion within the second preset time period does not exist in the oil smoke proportion smaller than the preset oil smoke proportion, the controller 3 judges that the filter element is invalid.
Through being greater than or equal to the oil smoke proportion of predetermineeing in the second oil smoke proportion, namely when the purification filtration efficiency of air purification device 2 is relatively poor and not improving, controller 3 determines in the second in advance in a long period of time that the oil smoke concentration of wind gap and the oil smoke concentration of air intake between the third oil smoke proportion to judge whether there is the oil smoke proportion that is less than the oil smoke proportion of predetermineeing in the third oil smoke proportion, if not, the purification filtration efficiency of air purification device 2 is still relatively poor, and the oil smoke in the kitchen space can not carry out effectual purification through air purification device 2 always, and the filter is inefficacy to controller 3 judgement filtration piece this moment. The second preset duration may be reasonably set, where the second preset duration is less than the first preset duration, for example, the second preset duration is 1 minute, 2 minutes, and so on.
Since the soot is composed of PME and VOCs. Based thereon, the soot concentration may be characterized by a particulate concentration and/or an odor concentration.
In an embodiment, the first smoke sensor 4 and the second smoke sensor 5 are particulate matter sensors, so as to determine the air quality in the kitchen by detecting the concentration of particulate matter in the air. It can be understood that in this embodiment, in the process of judging whether the filter element fails according to the soot concentration, judgment control is performed according to the particulate matter concentration. For example: the ratio of the preset oil smoke is 40%, the first preset duration is 5 minutes, and the second preset duration is 5 minutes; if the first inlet air oil smoke concentration is 150.0ug/m 3 The first air-out oil smoke concentration is 100ug/m 3 Further, the first oil smoke ratio is 66.7% or more and equal to the preset oil smoke ratio, if the air purifying device is started for 5min, the second oil smoke ratio is greater than or equal to the preset oil smoke ratio, and within 5-10 min of the air purifying device is started, the third oil smoke ratio between the oil smoke concentration of the air outlet and the oil smoke concentration of the air inlet is greater than or equal to the preset oil smoke ratio,it means that the air cleaning device 2 cannot effectively clean the air in the kitchen space at this time, and further it is determined that the filter of the air cleaning device 2 is out of order, and the filter needs to be replaced. Of course, if the first air-out oil smoke concentration is 50ug/m 3 And if the first oil smoke ratio is 33.3% less than the preset oil smoke ratio, and if the air purification device is started for 5min, the second oil smoke ratio is less than the preset oil smoke ratio, and the third oil smoke ratio between the oil smoke concentration of the air outlet and the oil smoke concentration of the air inlet is less than the preset oil smoke ratio within 5-10 min after the air purification device is started, the filter is judged to be effective, and the filter is not required to be replaced.
In another embodiment, the first smoke sensor 4 and the second smoke sensor 5 are both smell sensors to determine the air quality in the kitchen by detecting the smell concentration in the air. It can be understood that in this embodiment, in the process of judging whether the filter element is out of operation according to the oil smoke concentration, judgment control is performed according to the odor concentration in the air. For example: the ratio of the preset oil smoke is 40%, the first preset duration is 5 minutes, and the second preset duration is 5 minutes; if the first inlet air oil smoke concentration is 2.0mg/m 3 The first air-out oil smoke concentration is 1.2mg/m 3 And then the first oil smoke proportion is 60% or more and is equal to the preset oil smoke proportion, if the air purification device is started for 5 minutes, the second oil smoke proportion is greater than or equal to the preset oil smoke proportion, and the third oil smoke proportion between the oil smoke concentration of the air outlet and the oil smoke concentration of the air inlet is greater than or equal to the preset oil smoke proportion within 5-10 minutes of the air purification device being started, the air purification device 2 can not effectively purify the air in the kitchen space at the moment, and then the filter element of the air purification device 2 is judged to be invalid, and the filter element needs to be replaced. Of course, if the first outlet air oil smoke concentration is 0.6mg/m 3 And then the first oil smoke proportion is 30% less than the preset oil smoke proportion, if the air purification device is started for 5min, the second oil smoke proportion is less than the preset oil smoke proportion, and within 5-6 min of the air purification device is started, the third oil smoke proportion between the oil smoke concentration of the air outlet and the oil smoke concentration of the air inlet is less than the preset oil smoke proportion, the filter is judged to be effective, and no need of being carried outThe filter element is replaced.
The invention also provides a control method of the range hood. Referring to fig. 11, fig. 11 is a flowchart illustrating a control method of a range hood according to a first embodiment of the present invention.
The control method of the range hood of the present embodiment adopts the range hood of each embodiment. The control method of the range hood comprises the following steps:
and step S101, judging whether a filter element of the air purifying device fails or not according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet.
In this embodiment, the controller obtains the oil smoke concentration of the air inlet corresponding to the kitchen space through the first oil smoke sensor, and obtains the oil smoke concentration of the air outlet corresponding to the kitchen space through the second oil smoke sensor.
According to the control method of the range hood, whether the filter element fails or not is judged according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet, namely whether the filter element can effectively filter and purify the oil smoke is judged; and when the filter element fails, the prompt message of changing the filter element is output to remind the user to timely change or clean the filter element, so as to avoid the phenomenon that the oil smoke pollution and the health damage to human body are caused due to the diffusion of the oil smoke generated by cooking in the kitchen space when the purifying and filtering efficiency of the oil smoke is gradually reduced by the air purifying device and the oil smoke is difficult to effectively purify along with the increase of the service time of the air purifying device.
Based on the first embodiment, a second embodiment of the control method of the range hood of the present invention is proposed, in which step S101 includes:
step S201, when the air purification device is in a stop state, acquiring the first air inlet oil smoke concentration of the air inlet;
step S202, controlling the air purification device to be started, and obtaining the first outlet air oil smoke concentration of the air outlet;
step S203, determining whether the filter element is invalid based on the first outlet air oil smoke concentration and the first inlet air oil smoke concentration.
In the embodiment, when the air purification device is in a stop state, the controller acquires the first air inlet oil smoke concentration of the air inlet so as to acquire the oil smoke concentration in the kitchen before the air purification device is started; then the controller controls the air purifying device to be started, and obtains the first outlet air oil smoke concentration of the air outlet, so as to obtain the oil smoke concentration purified by the air purifying device when the air purifying device is started; then, the controller judges whether the filter element is invalid based on the first air outlet oil smoke concentration and the first air inlet oil smoke concentration, and further, the air purifying device is used for purifying the oil smoke concentration before and after filtration, so that whether the filter element is invalid is accurately judged.
According to the control method of the range hood, when the air purifying device is in a stop state, the first air inlet oil smoke concentration of the air inlet is obtained; then controlling the air purification device to be started, and obtaining the first outlet air oil smoke concentration of the air outlet; and then judging whether the filter piece is invalid based on the first air-out oil smoke concentration and the first air-in oil smoke concentration, and accurately judging whether the filter piece is invalid through the oil smoke concentration before and after the purification and filtration of the air purification device so as to avoid the phenomenon that the oil smoke generated by cooking is diffused in a kitchen space to cause oil smoke pollution and health damage to human bodies when the air purification device is difficult to effectively purify the oil smoke.
Based on the second embodiment, a third embodiment of the control method of the range hood according to the present invention is provided, in which step S203 includes:
step S301, determining a first oil smoke ratio between a first air outlet oil smoke concentration and a first air inlet oil smoke concentration;
step S302, if the first oil smoke ratio is greater than or equal to a preset oil smoke ratio, determining that the filter element fails.
In this embodiment, the controller determines the first oil smoke proportion between first air-out oil smoke concentration and the first air inlet oil smoke concentration, and the first oil smoke proportion is first air-out oil smoke concentration divided by first air inlet oil smoke concentration to judge whether first oil smoke proportion is greater than or equal to preset oil smoke proportion, if first oil smoke proportion is greater than or equal to preset oil smoke proportion, then the purification filtration efficiency of current air purification device is relatively poor, the oil smoke in the kitchen space can not carry out effectual purification through air purification device, and the controller judges that the filter is invalid, and then according to the oil smoke concentration before and after the air purification device purifies the filtration, accurately judges whether the filter is invalid.
The preset oil smoke ratio can be reasonably set, for example, the preset oil smoke ratio is 40%, 50% and the like.
According to the control method of the range hood, the first oil smoke proportion between the first air outlet oil smoke concentration and the first air inlet oil smoke concentration is determined; and then if the first oil smoke proportion is greater than or equal to the preset oil smoke proportion, judging that the filter element fails, and accurately judging whether the filter element fails according to the oil smoke concentration before and after purification and filtration of the air purification device, so that the accuracy of judging the failure of the filter element is improved.
Based on the third embodiment, a fourth embodiment of the control method of the range hood according to the present invention is provided, in which step S302 includes:
step S401, if the first oil smoke ratio is greater than or equal to a preset oil smoke ratio and the opening time of the air purification device reaches a first preset time, acquiring the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet;
step S402, if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, judging that the filter element is invalid.
In this embodiment, when the first oil smoke ratio is greater than or equal to the preset oil smoke ratio, that is, when the purifying and filtering efficiency of the air purifying device is poor, the current opening time of the air purifying device is accumulated, if the opening time reaches the first preset time, the controller acquires the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet again, calculates the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration, and the second oil smoke ratio is the second air outlet oil smoke concentration divided by the second air inlet oil smoke concentration, and if the second oil smoke ratio is greater than or equal to the preset oil smoke ratio, the purifying and filtering of the current air purifying device is not improved, and the oil smoke in the kitchen space cannot be purified effectively by the air purifying device, and the controller determines that the filter element is invalid.
In other embodiments, the controller outputs a prompt message for replacing the filter element to remind a user to replace or clean the filter element in time, so as to avoid the phenomenon that when the air purifying device is difficult to effectively purify the oil smoke, the oil smoke generated by cooking is diffused in the kitchen space, and the oil smoke pollution and the damage to the health of a human body are caused. The first preset duration may be set reasonably, for example, the first preset duration is 5 minutes, etc.
According to the control method of the range hood, if the first oil smoke proportion is greater than or equal to the preset oil smoke proportion and the opening time of the air purification device reaches the first preset time, the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet are obtained; and then if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, judging that the filter element fails, and accurately judging whether the filter element fails according to the oil smoke concentration before and after the air purification device is started and the first preset time period after the air purification device is started, so that the accuracy of judging the failure of the filter element is further improved.
Based on the fourth embodiment, a fifth embodiment of the control method of a range hood according to the present invention is provided, in which step S401 includes:
step S501, if a second oil smoke ratio between a second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to a preset oil smoke ratio, determining a third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet in real time within a second preset time period after the current moment;
Step S502, if the third oil smoke proportion in the second preset time period does not have the oil smoke proportion smaller than the preset oil smoke proportion, judging that the filter element is invalid.
In this embodiment, through when the second oil smoke proportion is greater than or equal to the preset oil smoke proportion, that is, when the purification filtration efficiency of the air purification device is poor and not improved, the controller determines in real time the third oil smoke proportion between the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet in the second preset time period, and judges whether the oil smoke proportion smaller than the preset oil smoke proportion exists in the third oil smoke proportion, if the oil smoke proportion does not exist, that is, the purification filtration efficiency of the air purification device is still poor, the oil smoke in the kitchen space can not be purified effectively all the time through the air purification device, and at the moment, the controller judges that the filter element is invalid.
The second preset duration may be reasonably set, where the second preset duration is less than the first preset duration, for example, the second preset duration is 1 minute, 2 minutes, and so on.
According to the control method of the range hood, if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is larger than or equal to the preset oil smoke ratio, the third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet is determined in real time within a second preset time period after the current moment; and then if the oil smoke ratio smaller than the preset oil smoke ratio does not exist in the third oil smoke ratio in the second preset time period, judging that the filter piece is invalid, and accurately judging whether the filter piece is invalid or not according to the oil smoke concentration before and after the purification filtration in the second preset time period when the air purification device is started and after the first preset time period is started, so that the accuracy of judging the filter piece is further improved.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with a control program of the range hood, and the control program of the range hood realizes the steps of the control method of the range hood when being executed by a processor. Since the computer readable storage medium adopts all the technical solutions of all the embodiments, at least the beneficial effects brought by the technical solutions of the embodiments are provided, and will not be described in detail herein.
It should be noted that the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the embodiments, and when the technical solutions are contradictory or cannot be implemented, those skilled in the art should consider that the technical solutions are not combined, and are not within the scope of protection claimed by the present invention.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A range hood, comprising:
a tobacco machine main body; and
the air purifying device is provided with a purifying air duct and a filtering piece arranged in the purifying air duct;
the outer surface of the cigarette machine main body is provided with an air inlet communicated with the purification air duct and an air outlet communicated with the purification air duct;
the first oil smoke sensor is used for detecting the oil smoke concentration of the air inlet;
the second oil smoke sensor is used for detecting the oil smoke concentration of the air outlet;
the controller is electrically connected with the first oil smoke sensor and the second oil smoke sensor respectively;
the smoke machine main body comprises a decoration cover, the air inlets are arranged on the side surfaces of the decoration cover, one air inlet is respectively arranged on the two opposite side surfaces of the decoration cover, two filtering pieces are arranged, and each filtering piece is arranged close to one air inlet;
the controller is used for judging whether the filter element fails or not according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet;
when the air purification device is in a stop state, the controller acquires the first air inlet oil smoke concentration of the air inlet;
the controller controls the air purifying device to be started, and obtains the first air outlet oil smoke concentration of the air outlet;
The controller determines a first oil smoke ratio between a first air outlet oil smoke concentration and a first air inlet oil smoke concentration;
if the first oil smoke proportion is greater than or equal to a preset oil smoke proportion and the opening time of the air purification device reaches a first preset time, the controller obtains the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet;
and if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, the controller judges that the filter element fails.
2. The range hood of claim 1, wherein,
if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is larger than or equal to the preset oil smoke ratio, the controller determines a third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet in real time within a second preset time period after the current moment;
and if the third oil smoke proportion in the second preset time period does not have the oil smoke proportion smaller than the preset oil smoke proportion, the controller judges that the filter element is invalid.
3. The range hood according to any one of claims 1 or 2, wherein the hood body comprises a decorative cover and a smoke collecting hood disposed below the decorative cover;
The first oil smoke sensor is arranged at the air inlet; or alternatively, the process may be performed,
the first oil smoke sensor is arranged on the side face of the fume collecting hood; or alternatively, the process may be performed,
the first oil smoke sensor is arranged at the upper end of the decorative cover.
4. The range hood according to any one of claims 1 or 2, wherein the hood body comprises a decorative cover and a smoke collecting hood disposed below the decorative cover;
the second oil smoke sensor is arranged at the air outlet; or alternatively, the process may be performed,
the second oil smoke sensor is arranged at a position, close to the air outlet, in the decorative cover; or alternatively, the process may be performed,
the second oil smoke sensor is arranged at a position, close to the air outlet, in the fume collecting hood.
5. A control method of a range hood, which is applied to the range hood according to any one of claims 1 to 4, comprising the steps of:
and judging whether the filter element of the air purifying device fails or not according to the oil smoke concentration of the air inlet and the oil smoke concentration of the air outlet.
6. The method of controlling a range hood according to claim 5, wherein the step of judging whether the filter of the air cleaning device is out of order according to the concentration of the oil smoke at the air inlet and the concentration of the oil smoke at the air outlet comprises:
When the air purification device is in a stop state, acquiring the first air inlet oil smoke concentration of the air inlet;
controlling the air purification device to be started, and obtaining the first outlet air oil smoke concentration of the air outlet; and
and judging whether the filter element is invalid or not based on the first air outlet oil smoke concentration and the first air inlet oil smoke concentration.
7. The method of controlling a range hood according to claim 6, wherein the step of determining whether the filter is failed based on the first outlet air smoke concentration and the first inlet air smoke concentration comprises:
determining a first oil smoke ratio between the first air-out oil smoke concentration and the first air-in oil smoke concentration; and
and if the first oil smoke ratio is greater than or equal to the preset oil smoke ratio, judging that the filter element fails.
8. The method of controlling a range hood according to claim 7, wherein the step of determining that the filter is out of order if the first smoke ratio is greater than or equal to a preset smoke ratio comprises:
if the first oil smoke proportion is greater than or equal to a preset oil smoke proportion and the opening time of the air purification device reaches a first preset time, acquiring the second air inlet oil smoke concentration of the air inlet and the second air outlet oil smoke concentration of the air outlet; and
And if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is greater than or equal to the preset oil smoke ratio, judging that the filter element fails.
9. The method of claim 8, wherein if the second oil smoke ratio between the second air-out oil smoke concentration and the second air-in oil smoke concentration is greater than or equal to a preset oil smoke ratio, the step of determining that the filter is invalid comprises:
if the second oil smoke ratio between the second air outlet oil smoke concentration and the second air inlet oil smoke concentration is larger than or equal to the preset oil smoke ratio, determining a third oil smoke ratio between the oil smoke concentration of the air inlet and the oil smoke concentration of the air inlet in real time within a second preset time period after the current moment; and
and if the oil smoke proportion smaller than the preset oil smoke proportion does not exist in the third oil smoke proportion in the second preset time period, judging that the filter element is invalid.
10. A computer-readable storage medium, wherein a control program of a range hood is stored on the computer-readable storage medium, which when executed by a processor, implements the steps of the control method of a range hood according to any one of claims 5 to 9.
CN202010840332.6A 2020-08-19 2020-08-19 Range hood, control method thereof and computer readable storage medium Active CN114076330B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106225037A (en) * 2016-08-31 2016-12-14 天津大学 A kind of lampblack absorber of band personalization air purifier
CN206001580U (en) * 2016-08-31 2017-03-08 天津大学 A kind of lampblack absorber with personalized air purifier
CN206463606U (en) * 2016-09-06 2017-09-05 重庆及中生智科技有限公司 Filter replacement alarm set
CN109340843A (en) * 2018-08-22 2019-02-15 南京理工大学 A kind of multistage lampblack purifying system of dedicated intelligence of the catering trade with air gate
CN109539341A (en) * 2017-09-21 2019-03-29 宁波方太厨具有限公司 A kind of filter screen of range hood monitoring device and method
CN208722037U (en) * 2018-11-12 2019-04-09 杭州博易环境技术有限公司 A kind of oil smoke on-line monitoring monitor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106225037A (en) * 2016-08-31 2016-12-14 天津大学 A kind of lampblack absorber of band personalization air purifier
CN206001580U (en) * 2016-08-31 2017-03-08 天津大学 A kind of lampblack absorber with personalized air purifier
CN206463606U (en) * 2016-09-06 2017-09-05 重庆及中生智科技有限公司 Filter replacement alarm set
CN109539341A (en) * 2017-09-21 2019-03-29 宁波方太厨具有限公司 A kind of filter screen of range hood monitoring device and method
CN109340843A (en) * 2018-08-22 2019-02-15 南京理工大学 A kind of multistage lampblack purifying system of dedicated intelligence of the catering trade with air gate
CN208722037U (en) * 2018-11-12 2019-04-09 杭州博易环境技术有限公司 A kind of oil smoke on-line monitoring monitor

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