CN110307569B - Control method and control device of range hood and range hood - Google Patents
Control method and control device of range hood and range hood Download PDFInfo
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- CN110307569B CN110307569B CN201810258471.0A CN201810258471A CN110307569B CN 110307569 B CN110307569 B CN 110307569B CN 201810258471 A CN201810258471 A CN 201810258471A CN 110307569 B CN110307569 B CN 110307569B
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- weight coefficient
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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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- 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
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
A control method of a range hood comprises the steps of obtaining a humidity value and a temperature value detected by a sensor; the controller detects whether a cooking event occurs according to a first change rate corresponding to the humidity value and a second change rate corresponding to the temperature value, and controls the fan to be started when the cooking event occurs. Through monitoring temperature and humidity change, can detect in time that the culinary art incident has taken place to the start-up of control fan makes the lampblack absorber handle the oil smoke at the first moment of taking place the culinary art time. In addition, the method can save energy and reduce noise. The invention also relates to a range hood and a control device.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a control method and a control device for a range hood and the range hood.
Background
During the cooking process, the temperature, humidity, air quality, etc. of the kitchen may change. The existing range hood controls the operation of a fan in a mode of detecting the air quality of a kitchen. However, this method usually requires the user to turn on the smoke exhaust function of the range hood before cooking, and then controls the fan according to the air quality and the like; and the change of the air quality of the kitchen can be detected within a period of time after the user starts to cook, and the oil fume condition cannot be timely treated in the mode.
Disclosure of Invention
It is an object of embodiments of the present invention to detect the occurrence and termination of cooking events in a timely manner and to accurately control a range hood fan.
In order to achieve the above object, the present invention provides a control method for a range hood, comprising the steps of: acquiring a humidity value and a temperature value detected by a sensor; the controller detects whether a cooking event occurs according to a first change rate corresponding to the humidity value and a second change rate corresponding to the temperature value, and controls the fan to be started when the cooking event occurs. Therefore, the cooking event can be accurately detected according to the change rate of the temperature and the humidity, and the fan of the range hood is controlled to be started.
In one possible embodiment, the controller obtains the humidity value and the temperature value at the first time and the second time respectively; respectively calculating a first rate of change and a second rate of change of the humidity value and the temperature value at the second moment relative to the first moment; and judging whether a cooking event occurs according to the weight sum of the first change rate and the second change rate.
In one possible embodiment, the controller calculates the weights and f (t) by the following equation:
f(t)＝A*︱H(t)︱+B*︱T(t)︱；
where A and B are preset weighting coefficients, t represents time, and A, B are both positive numbers.
And when the weight sum is greater than or equal to a preset threshold value, judging that a cooking event occurs.
And when the weight sum is reduced to be less than a preset threshold value, judging that the cooking event is ended, and turning off the fan or turning off the fan after a preset time. The preset threshold is greater than or equal to 1 and less than or equal to 5.
In one possible embodiment, the controller comprises a preset corresponding relation table of values of the weight coefficient A and the weight coefficient B and seasons and/or climates; in the control process, the controller determines season information and climate information, and obtains a weight coefficient A and a weight coefficient B according to a corresponding relation table of values of the weight coefficient A and the weight coefficient B and the season and/or the climate.
In one possible embodiment, the controller determines the season information based on the set calendar information, or the controller acquires the current day climate information through the network. The scheme can realize that the value of the weight coefficient is adjusted by considering seasons and climate factors, thereby accurately detecting the cooking event.
In one possible embodiment, the controller includes a preset correspondence table of values of the weight coefficient a and the weight coefficient B and temperature and humidity, and in the control process, the controller obtains the values of the weight coefficient a and the weight coefficient B by reading the correspondence table of the values of the weight coefficient a and the weight coefficient B and the temperature and humidity according to the temperature and humidity measured in real time.
In a possible embodiment, the temperature and the humidity in the correspondence table of the values of the weight coefficient a and the weight coefficient B and the temperature and the humidity may be an interval value, respectively. According to the scheme, the value of the weight coefficient is adjusted by considering real-time detection of the temperature and the humidity, so that the cooking event can be accurately detected.
The time difference between the first time and the second time is 3 seconds.
The embodiment of the invention also discloses a control device for the range hood, which comprises an acquisition module, a detection module and a control module, wherein the acquisition module is used for acquiring the humidity value and the temperature value detected by the sensor; the detection module is used for detecting whether a cooking event occurs according to a first change rate corresponding to the humidity value and/or a second change rate corresponding to the temperature value; the control module is used for controlling the fan to start when a cooking event occurs.
The embodiment of the invention also discloses a range hood comprising the control device.
Compared with the prior art, the technical scheme of the invention has the following advantages:
by adopting the scheme, the cooking event can be detected in time by monitoring the temperature and humidity change, so that the starting of the fan is controlled, and the lampblack is processed by the range hood at the first moment of the cooking time. In addition, the method can save energy and reduce noise.
Drawings
FIG. 1 is a schematic structural diagram of a range hood in an embodiment of the invention;
FIG. 2 is a block diagram of a range hood according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method in an embodiment of the invention;
FIG. 4 is a block diagram of a control apparatus according to an embodiment of the present invention;
FIG. 5 is a block diagram of a detection module according to an embodiment of the present invention;
fig. 6 is a flow chart of the operation of the range hood in the embodiment of the invention.
Detailed Description
As shown in fig. 1, a range hood 10 includes a housing 11 and a smoke collecting hood 12 connected to the housing 11, wherein the housing 11 includes an air inlet, an air outlet and an air duct 13 therebetween. The hood 10 further includes a fan 14 disposed in the duct 13. In one embodiment, the range hood 10 further includes a sensor 16 disposed in the smoke collecting hood 12, which can detect indoor environment such as temperature, humidity, air pressure, smoke, etc. The sensor 16 may be a temperature sensor, a humidity sensor, or the like, or may be a multi-in-one sensor that detects temperature, humidity, air pressure, and oil smoke, respectively. The range hood 10 further includes a controller 15 for controlling the operation of the fan according to a control instruction or detection data. In one embodiment, the controller is disposed on the top of the housing or on the fume hood. Fig. 2 shows a block diagram of the range hood 10.
The range hood can execute the following method, as shown in fig. 3, and the control method of the range hood comprises the following steps:
s100, acquiring a humidity value and a temperature value detected by a sensor by a controller;
s200, the controller detects whether a cooking event occurs according to a first change rate corresponding to the humidity value and a second change rate corresponding to the temperature value, and controls the fan to be started when the cooking event occurs.
In one embodiment, the controller obtains a humidity value and a temperature value at a first time or a second time, respectively; respectively calculating a first rate of change and a second rate of change of the humidity value and the temperature value at the second moment relative to the first moment; and judging whether a cooking event occurs according to the weight sum of the first change rate and the second change rate.
According to experiments, when a cooking event occurs in a kitchen, the temperature and the humidity in the room of the kitchen can be changed, namely, the temperature can be increased, and the humidity can be reduced. When the cooking event is over, the temperature will decrease and the humidity will increase. The variation values of temperature and humidity can more effectively represent the variation of the kitchen cooking event. Thus, in one embodiment, the rate of change of humidity (first rate of change) is represented by h (t), such as:
the rate of change of temperature (second rate of change) is represented by T (t), such as:
Further, the weight sum f (t) is calculated by the following formula:
f(t)＝A*︱H(t)︱+B*︱T(t)︱；
where A and B are preset weighting coefficients, t represents time, and A, B are both positive numbers.
It is found through experiments that normally, in the case where humidity is small at the first time and temperature is high, the variation in humidity and temperature is relatively small when a cooking event occurs, that is, the values of | h (t) and | t (t) are small; in the case where the temperature at the first time is high and the humidity is high, the change in humidity is large relative to the change in temperature when a cooking event occurs. Therefore, it is desirable to adjust the weight of the agents H (t) and T (t) through A and B, and one of the values with relatively small variation may be amplified, thereby more accurately characterizing the relationship between temperature and humidity and the cooking event.
In one embodiment, the controller is preset with the corresponding relation between the values of A and B and reference factors, wherein the reference factors can be seasons, climates, or the temperature and humidity in the kitchen before cooking, and the like.
For example, in a sunny day in summer, the humidity in the kitchen is low, the temperature in the kitchen is high, and the humidity change rate H and the temperature change rate T corresponding to the occurrence of a cooking event are both small, so that a and B may be both set to large values, for example, both 10. In case of rainy winter, the humidity and temperature in the kitchen are high, and the humidity change rate H and the temperature change rate T are both high when a cooking event occurs, so a and B can be set to a large value, for example, both 1.
In addition, the proportional relation between A and B is not fixed, and can change along with the change of the reference factor. For example, in rainy summer days, the temperature and humidity in the kitchen room are high, the corresponding humidity change rate H is high and the temperature change rate T is small when a cooking event occurs, and the value of the coefficient B corresponding to the temperature change rate may be appropriately amplified, for example, a is set to 1 and B is set to 5.
In one embodiment, the difference between the first time and the second time satisfies the condition: the time period enables the sensor to reflect the temperature and humidity changes in time. An alternative embodiment is 3 seconds.
When the weight sum f (t) is greater than or equal to a preset threshold value, judging that a cooking event occurs; when the value falls below the threshold, the cooking event is ended and the fan is turned off or delayed for a period of time. In one embodiment, the preset threshold is greater than or equal to 1 and less than or equal to 5.
Fig. 4 is a control device 15 for a range hood, comprising an acquisition module 151, a detection module 152 and a control module 153, wherein the acquisition module 151 is used for acquiring a humidity value and a temperature value detected by the sensor; the detection module 152 is configured to detect whether a cooking event occurs according to a first change rate corresponding to the humidity value and/or a second change rate corresponding to the temperature value; a control module 153 for controlling the fan to be activated when a cooking event occurs.
In one embodiment, as shown in fig. 5, the detection module 152 further includes: an obtaining unit 1521, configured to obtain a humidity value and a temperature value at a first time and a second time, respectively; a calculating unit 1522, configured to calculate a first rate of change and a second rate of change of the humidity value and the temperature value at the second time with respect to the first time, respectively; a determining unit 1523, configured to determine whether a cooking event occurs according to the weighted sum of the first rate of change and the second rate of change.
The judgment unit 1523 is also used for calculating the weight sum f (t) by the following formula:
f (t) ═ a | h (t) | + B | t (t) |, where h (t) represents a first rate of change, t (t) represents a second rate of change, a and B are preset weight coefficients, t represents time, and both the weight coefficient a and the weight coefficient B are positive numbers.
When the sum of weights is greater than or equal to a preset threshold, the determination unit 1523 determines that a cooking event has occurred; when the sum of the weights is less than the preset threshold, it is judged that the cooking event is finished, so that the control module 153 turns off the fan or turns off the fan after a preset time.
In one embodiment, the control module 153 includes a preset correspondence table between values of the weight coefficient a and the weight coefficient B and the season and/or climate; the control module 153 determines the season information and the climate information, and obtains the weighting factor a and the weighting factor B according to the correspondence table between the values of the weighting factor a and the weighting factor B and the season and/or the climate.
In one embodiment, the control module 153 includes a preset correspondence table between values of the weight coefficient a and the weight coefficient B and the temperature and humidity; the control module 153 obtains the weight coefficient a and the weight coefficient B by reading a preset correspondence table between the values of the weight coefficient a and the weight coefficient B and the temperature and the humidity according to the temperature and the humidity measured in real time.
The workflow thereof is described in detail below.
Referring to fig. 6, after the range hood is turned on, the sensors detect and collect kitchen temperature and humidity data in real time and transmit the data to the controller. The controller calculates a temperature change rate and a humidity change rate between two time points according to the detected values. The value of f (t) is then obtained according to the formula previously described. Wherein, the weighting coefficients A and B can be predefined according to the change of seasons or automatically set by the system.
In one embodiment, a corresponding relation table of values of A and B and seasons and/or climates is predefined in the controller. For example, the controller may determine season information from set calendar information, and/or may acquire current day climate information via a network. For example, when the controller determines that summer and rainy day are present, corresponding a and B may be obtained according to the correspondence table of the values of a and B and the season and/or climate, and corresponding f (t) may be calculated.
In other embodiments, a correspondence table between the values of a and B and the temperature and humidity may be preset, where the temperature and humidity may be an interval value, respectively, so that the values of a and B change too frequently. And the controller obtains the values of A and B by reading a preset corresponding relation table of the values of A and B and the temperature and the humidity according to the temperature and the humidity measured in real time, and then f (t) is calculated.
The controller determines the magnitude of f (t). If f (t) is greater than the system preset value, determining that a cooking event has occurred; the controller controls the fan to start, or reminds a user to start the fan in a buzzing reminding mode and the like. In addition, when the value of f (t) decreases to less than the system preset value, the cooking event is ended, and the fan is turned off or delayed for a period of time. Through monitoring temperature and humidity change, can detect in time that the culinary art incident has taken place to the start-up of control fan makes the lampblack absorber handle the oil smoke at the first moment of taking place the culinary art time. In addition, the method can save energy and reduce noise.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A control method of a range hood, wherein the range hood comprises a fan, a sensor and a controller, and is characterized by comprising the following steps:
the controller acquires a humidity value and a temperature value detected by the sensor; the controller detects whether a cooking event occurs according to a first change rate corresponding to the humidity value and a second change rate corresponding to the temperature value, and controls the fan to be started when the cooking event occurs;
the controller detects whether a cooking event occurs according to a first change rate corresponding to the humidity value and a second change rate corresponding to the temperature value, and the controller respectively acquires the humidity value and the temperature value at a first moment and a second moment; respectively calculating a first rate of change and a second rate of change of the humidity value and the temperature value at the second moment relative to the first moment; judging whether a cooking event occurs according to the weight sum of the first change rate and the second change rate, comprising the following steps: the weight sum f (t) is calculated by the following formula: f (t) ═ a | h (t) | + B | t (t) |, wherein h (t) represents a first rate of change, t (t) represents a second rate of change, a and B are preset weight coefficients, t represents time, and both the weight coefficient a and the weight coefficient B are positive numbers; the weight coefficient A and the weight coefficient B are related to temperature values and humidity values in the kitchen before cooking, the weight coefficient B is increased when a first change rate is larger than a second change rate, and the weight coefficient A is increased when the first change rate is smaller than the second change rate.
2. The method of claim 1, further comprising determining that a cooking event has occurred when the sum of weights is greater than or equal to a preset threshold.
3. The method of claim 2, wherein when the sum of weights falls below a preset threshold, it is determined that the cooking event is over, the fan is turned off or the fan is turned off after a preset time.
4. The method of claim 2, wherein the predetermined threshold is greater than or equal to 1 and less than or equal to 5.
5. The method of claim 1, wherein the controller comprises a preset corresponding relation table of values of the weight coefficient A and the weight coefficient B and seasons and/or climates; in the control process, the controller determines season information and climate information, and obtains a weight coefficient A and a weight coefficient B according to a corresponding relation table of values of the weight coefficient A and the weight coefficient B and the season and/or the climate.
6. The method of claim 5, wherein the controller determines season information according to set calendar information or the controller acquires current day climate information through a network.
7. The method of claim 1, wherein the controller includes a preset correspondence table of values of the weight coefficient a and the weight coefficient B with the temperature and the humidity, and in the control process, the controller obtains the values of the weight coefficient a and the weight coefficient B by reading the correspondence table of the values of the preset weight coefficient a and the weight coefficient B with the temperature and the humidity according to the temperature and the humidity measured in real time.
8. The method of claim 7, wherein: the temperature and the humidity in the corresponding relation table of the values of the weight coefficient A and the weight coefficient B and the temperature and the humidity are respectively an interval value.
9. The method of claim 1, wherein the time difference between the first time and the second time is 3 seconds.
10. A control device (15) for a range hood, characterized by comprising: an acquisition module (151) for acquiring a humidity value and a temperature value detected by the sensor; the detection module (152) is used for detecting whether a cooking event occurs according to a first change rate corresponding to the humidity value and a second change rate corresponding to the temperature value; a control module (153) for controlling the fan to start when a cooking event occurs;
the detection module (152) further comprises: an acquisition unit (1521) for acquiring a humidity value and a temperature value at a first time and a second time, respectively; a calculation unit (1522) for calculating a first rate of change and a second rate of change of the humidity value and the temperature value, respectively, with respect to the first time at the second time; a judging unit (1523) for judging whether a cooking event occurs according to the weight sum of the first rate of change and the second rate of change;
the judging unit (1523) is further configured to calculate a weight sum f (t) by the following formula: f (t) ═ a | h (t) | + B | t (t) |, wherein h (t) represents a first rate of change, t (t) represents a second rate of change, a and B are preset weight coefficients, t represents time, and both the weight coefficient a and the weight coefficient B are positive numbers; the weight coefficient A and the weight coefficient B are related to temperature values and humidity values in the kitchen before cooking, the weight coefficient B is increased when a first change rate is larger than a second change rate, and the weight coefficient A is increased when the first change rate is smaller than the second change rate.
11. The apparatus of claim 10, wherein the determining unit (1523) is further configured to determine that a cooking event has occurred when the sum of weights is greater than or equal to a preset threshold.
12. The apparatus as claimed in claim 10, wherein the judging unit (1523) is further configured to judge that the cooking event is over when the sum of weights decreases to less than a preset threshold, so that the control module turns off the fan or turns off the fan after a preset time.
13. The apparatus according to claim 10, wherein the control module (153) comprises a table of correspondence between preset values of a weighting factor a and a weighting factor B and seasons and/or climates; the control module (153) is also used for determining season information and climate information, and obtaining a weight coefficient A and a weight coefficient B according to a corresponding relation table of values of the weight coefficient A and the weight coefficient B and the season and/or the climate.
14. The apparatus according to claim 10, wherein the control module (153) comprises a preset weighting factor a and weighting factor B value and temperature and humidity correspondence table; the control module (153) is also used for obtaining the weight coefficient A and the weight coefficient B according to the temperature and the humidity measured in real time and by reading a corresponding relation table of the values of the preset weight coefficient A and the preset weight coefficient B and the temperature and the humidity.
15. A range hood (10) comprising a fan (14), a sensor (16) and a control device (15) according to any of claims 10-14.
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| CN111412506B (en) * | 2020-03-31 | 2022-04-15 | 佛山市顺德区美的洗涤电器制造有限公司 | Starting detection method and device of cooking equipment, range hood and storage medium |
| CN114246456B (en) * | 2020-09-25 | 2022-10-04 | 浙江苏泊尔家电制造有限公司 | Control method of cooking appliance and cooking appliance |
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