CN113280383A - Range hood gear adjusting method and range hood - Google Patents

Abstract

The invention discloses a method for adjusting gears of a range hood and the range hood, wherein the method for adjusting the gears of the range hood comprises the following steps of obtaining the concentration of oil smoke; acquiring the variation of the temperature of the stove; and correspondingly adjusting the gear of the fan according to the relation between the variation of the oil smoke concentration and the temperature of the stove and the gear of the fan. The invention integrates two parameter factors of oil smoke concentration and variation of kitchen range temperature, correspondingly controls and adjusts the gear of the fan, utilizes the variation of the kitchen range temperature to replace the kitchen range temperature as a reference factor for adjusting the gear of the fan, can prevent the error of oil smoke quantity judgment caused by the pollution of a temperature detection device by oil stains and the like or the inaccurate detection value caused by different kitchen range states, and can improve the accuracy of oil smoke judgment by combining the oil smoke concentration, thereby improving the matching degree of the actual oil smoke quantity and the gear output by the fan.

Description

Range hood gear adjusting method and range hood

Technical Field

The invention belongs to the field of kitchen household appliances, and particularly relates to a method for adjusting gears of a range hood and the range hood.

Background

Currently, there are two devices used for detecting the size of oil smoke in a kitchen: the utility model provides a be according to oil smoke to infrared light's refraction principle direct detection smog concentration size's infrared photoelectric sensor, when the oil smoke was through infrared light detection area, the infrared light that infrared photoelectric sensor transmitting terminal sent can be refracted to the infrared light receiving terminal, the receiving terminal circuit turns into voltage numerical value output to received infrared light again, it is big more when the oil smoke, the infrared ray of following the transmitting terminal output is refracted and is gone into the receiving terminal just more, thereby the output numerical value of receiving terminal just is big more, quantify the oil smoke into specific numerical value size. The other type is an infrared temperature sensor for detecting the temperature of the kitchen range, the infrared ray sent by the detected kitchen range is converted into a voltage signal numerical value by using a temperature sensor circuit to be output, when the temperature of the kitchen range is reduced, the weaker the infrared ray sent by the kitchen range is, the smaller the output voltage signal numerical value is, when the temperature of the kitchen range is increased, the stronger the infrared ray sent by the kitchen range is, the larger the output voltage signal numerical value is, and then the oil smoke quantity is judged according to the rule that the higher the temperature of the kitchen range is, the larger the oil smoke quantity is.

However, when an infrared photoelectric sensor is used, when dust or other objects appear in an infrared detection area or under the condition that oil stains are stained on an infrared probe, the oil stains can be judged as oil smoke by mistake, and the condition of misidentification appears; when the infrared temperature sensor is used, the temperature value detected by the cooker when the cooker is covered with the cover is greatly different from that when the cooker is not covered with the cover, so that the infrared temperature sensor is easy to influence the detection of the temperature of the cooker by object isolation, and has great influence on the accurate detection of the actual temperature of the cooker.

The Chinese patent with the application number of CN201810198198.7 discloses an intelligent control system and method for a range hood based on multiple sensors, wherein the intelligent control system for the range hood comprises a controller, a smoke sensor, a humidity sensor, a temperature sensor, a human body detection device, a fan gear regulation and control device, a filter screen detection device, a timing device, an alarm device and a human-computer interaction device which are respectively in communication connection with the controller. Whether the condition of user exists in the temperature data and the kitchen of acquireing oil smoke concentration data, humidity data, pan in the kitchen environment that the lampblack absorber is located can adjust the fan output gear at each moment in real time for the fan gear that the lampblack absorber was exported adapts to the oil smoke condition at corresponding moment all the time, satisfies the intelligent adjustment to lampblack absorber fan output gear in the kitchen environment from this.

Although above-mentioned scheme has combined the detected value that smoke transducer and temperature sensor acquireed to adjust the fan gear, but one of them foundation is the size of the pan temperature that temperature sensor detected, can appear temperature sensor and be polluted by the greasy dirt or by the condition that the spot adheres to the interference test result, and then cause the detected value to take place the deviation, can't accurately judge whether real oil smoke produces.

The present invention has been made in view of the above technical drawbacks.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for adjusting the gear of a range hood, which integrates two factors of oil smoke concentration and range temperature variation, adjusts the gear of a fan and further improves the matching degree of the gear of the fan and the oil smoke amount in a kitchen.

In order to solve the technical problems, the invention adopts the technical scheme that:

a method for adjusting gears of a range hood comprises the following steps,

acquiring the concentration of oil smoke;

acquiring the variation of the temperature of the stove;

and correspondingly adjusting the gear of the fan according to the relation between the variation of the oil smoke concentration and the temperature of the stove and the gear of the fan.

By adopting the above scheme, synthesize two kinds of parameter factors of the change of oil smoke concentration and cooking utensils temperature, correspond the gear of control regulation fan, the change of utilizing cooking utensils temperature replaces cooking utensils temperature as the reference factor of adjustment fan gear, can prevent because temperature-detecting device is polluted by greasy dirt etc. or the different detected value that causes of cooking utensils state is inaccurate and lead to the error of oil smoke volume judgement, the oil smoke concentration that reunion, can improve the degree of accuracy of judging the oil smoke, and then improve the degree of matching of the gear of actual oil smoke volume and fan output.

Further, the step of correspondingly adjusting the gear of the fan according to the relationship between the variation of the oil smoke concentration and the temperature of the kitchen range and the gear of the fan comprises the steps of,

acquiring a first temporary gear of the fan according to the oil smoke concentration;

acquiring a second temporary gear of the fan according to the variation of the temperature of the stove;

and judging whether the two acquired temporary gears are the same, if so, controlling the fan to output the gear, and otherwise, controlling the fan to output a first set gear.

By adopting the scheme, when the two acquired temporary gears are the same, the oil smoke amount judged according to the two acquired values is considered to be close, and then the two acquired values are considered to be accurate, so that the corresponding fan gears can be output; when the two temporary gears are different, the oil smoke amount judged by the two acquisition values is considered to have a certain difference, and then one of the two acquisition values is considered to be inaccurate, and under the condition that which acquisition value is accurate cannot be judged, the preset gear in selection can be output, so that the degree of mismatch between the oil smoke amount and the gear of the fan is reduced.

Further, the variation of the stove temperature comprises the variation magnitude and the variation trend of the stove temperature.

By adopting the scheme, the variation of the temperature of the kitchen range comprises two parameters of variation size and variation trend, so that the two parameter factors of the comprehensive oil smoke concentration and the variation of the temperature of the kitchen range are extended into three reference factors, the accuracy of oil smoke judgment can be further improved, and the matching degree of the actual oil smoke quantity and the gear output by the fan is further improved.

Further, the mode of acquiring the second temporary gear of the fan according to the variation of the temperature of the cooker comprises the following steps,

dividing the variation of the temperature of the stove into a plurality of variation intervals, and correspondingly setting a third temporary gear in each variation interval;

judging a change interval in which the change size of the temperature of the stove is positioned, and acquiring a third temporary gear corresponding to the change interval;

judging the variation trend of the temperature of the cooker, and if the temperature is in an ascending trend, selecting the third temporary gear as a second temporary gear; if the temperature is in a descending trend, a second set gear is added on the basis of the third temporary gear to serve as a second temporary gear;

preferably, the second set gear is one gear.

By adopting the scheme, the variation trend and the variation parameter factor of the temperature of the cooker are integrated, the second temporary gear is correspondingly selected, the accuracy of oil smoke judgment according to the temperature of the cooker can be improved, and the matching degree of the second temporary gear and the oil smoke amount is further improved.

Furthermore, the mode of acquiring the first temporary gear of the fan according to the oil smoke concentration comprises the following steps,

dividing the oil smoke concentration into a plurality of intervals, and setting a temporary gear for each concentration interval;

and judging the concentration section in which the oil smoke concentration is positioned, and controlling and selecting a temporary gear corresponding to the concentration section.

By adopting the above scheme, because the obtained oil smoke concentration and the variation of the kitchen range temperature are almost two values that change all the time, if every obtained value corresponds to a temporary gear, on one hand, the range hood is required to have a huge database, the difficulty of production and manufacturing is increased, on the other hand, the range hood can be caused to be in a state that the gear is changed all the time, the waste of resources is caused, and the service life of the range hood is shortened. The range hood divides the variation of the oil smoke concentration and the temperature of the range into a plurality of variation intervals and variation intervals, can reduce the workload of technicians to a certain extent, can prevent the range hood from changing the gear of the fan all the time, and saves energy consumption.

Further, the acquired variation of the stove temperature refers to variation of the stove temperature in a first set time range and a second set time range before the second temporary gear of the fan is acquired.

By adopting the above scheme, the variation of the temperature of the cooking utensils within two time ranges is utilized to replace the variation of the temperature of the cooking utensils between two time points, so that the error can be reduced, the precision of the acquired variation is improved, and the matching precision of the acquired second temporary gear and the oil smoke amount is further improved.

Further, the manner of acquiring the variation of the temperature of the cooker comprises,

respectively controlling and calculating the average value of the temperature of the kitchen range within a first set time range and the average value of the temperature of the kitchen range within a second set time range;

and controlling and calculating the difference value of the average values of the temperatures of the two cookers to obtain the variation of the temperatures of the cookers.

Furthermore, the value taking modes in the two set time ranges comprise that a temperature value is taken at preset time intervals;

preferably, the preset time set corresponding to the two set time ranges is the same.

By adopting the scheme, the data acquisition amount can be reduced on the premise of ensuring the accuracy of the acquired variable quantity, and the energy consumption is reduced.

The invention also provides a range hood, which is used for implementing the range hood gear adjusting method.

Further, the device comprises a fan, a smoke detection device, a temperature detection device and a central control unit;

the central control unit comprises a central control unit which comprises,

the first signal receiving module is used for receiving the parameter information of the oil smoke concentration;

the second signal receiving module is used for receiving the parameter information of the temperature of the cooker;

the calculation module can calculate the average value and the difference value of the temperatures of the cooking utensils at two set times and the absolute value of the difference value according to the received parameter information of the temperatures of the cooking utensils at the two set times, so as to obtain the change magnitude of the temperatures of the cooking utensils;

the first judgment module is used for judging a concentration interval in which the oil smoke concentration is positioned and a change interval in which the change of the temperature of the stove is positioned according to the oil smoke concentration and the parameter information of the change of the temperature of the stove;

the second judgment module is used for judging the change trend of the temperature of the stove according to the positive and negative of the difference value;

the first selection module correspondingly selects a first temporary gear and a second temporary gear according to a concentration range in which the oil smoke concentration is located, a change range in which the change magnitude of the temperature of the stove is located and the change trend of the temperature of the stove;

the third judgment module is used for judging whether the selected first temporary gear and the second temporary gear are the same or not;

the second selection module is used for selecting the gear to be output by the fan according to the result of judging whether the first temporary gear and the second temporary gear are the same or not;

and the signal sending module is at least used for sending the gear information to be output by the selected fan to the fan.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. Synthesize two kinds of parameter factors of the change volume of oil smoke concentration and cooking utensils temperature, correspond the gear of control regulation fan, the change volume that utilizes cooking utensils temperature replaces cooking utensils temperature as the reference factor of adjustment fan gear, can prevent because the temperature-detecting device is polluted by greasy dirt etc. or the inaccurate detected value that causes of the different detected value that lead to of cooking utensils state is inaccurate and lead to the error of oil smoke volume judgement, the oil smoke concentration of reunion, can improve the degree of accuracy of judging the oil smoke, and then improve the degree of matching of the gear of actual oil smoke volume and fan output.

2. Determining the gear to be output by the fan according to whether the first temporary gear and the second temporary gear are the same, and when the two acquired temporary gears are the same, considering that the oil smoke amount judged according to the two acquired values is close, further considering that the two acquired values are accurate, and outputting the corresponding gear of the fan; when the two temporary gears are different, the oil smoke amount judged by the two acquisition values is considered to have a certain difference, and then one of the two acquisition values is considered to be inaccurate, and under the condition that which acquisition value is accurate cannot be judged, the preset gear in selection can be output, so that the degree of mismatch between the oil smoke amount and the gear of the fan is reduced.

3. The variation of the temperature of the kitchen range comprises two parameters of variation size and variation trend, the two parameter factors are integrated, the second temporary gear is correspondingly selected, the accuracy of oil smoke judgment according to the temperature of the kitchen range can be improved, and further the matching degree of the second temporary gear and the oil smoke quantity is improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic flow chart of a method for adjusting gears of a range hood according to the present invention;

fig. 2 is a schematic flow chart of a method for adjusting a gear of a range hood according to an embodiment of the present invention;

fig. 3 is a simplified schematic diagram of the range hood of the present invention.

In the figure: 1. a central control unit; 11. a first signal receiving module; 12. a second signal receiving module; 13. a first judgment module; 14. a first selection module; 15. a calculation module; 16. a signal transmitting module; 17. a second judgment module; 18. a second selection module; 19. a third judgment module; 2. a fan; 3. a smoke detection device; 4. a temperature detection device.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and fig. 2, the method for adjusting a gear of a range hood of the present invention includes the following steps,

s1, acquiring the oil smoke concentration;

s2, obtaining the variation of the temperature of the stove;

and S3, correspondingly adjusting the gear of the fan according to the relation between the variation of the oil smoke concentration and the temperature of the stove and the gear of the fan.

The step S1 of acquiring the oil smoke concentration and the step S2 of acquiring the variation of the temperature of the cooker are performed simultaneously or sequentially, that is, the oil smoke concentration is acquired first and then the variation of the temperature of the cooker is acquired, or the variation of the temperature of the cooker is acquired first and then the oil smoke concentration is acquired.

In the process of detecting the amount of oil smoke, when dust or other objects in the air cover the surface of the temperature detection device, the condition of inaccurate temperature identification can be caused; or under the condition that the pan covers the lid and does not cover, the cooking utensils temperature difference that detects is very big, can not be accurate judge the oil smoke volume through the size of temperature for the testing result deviation is great, and then causes the oil smoke volume big, and the fan gear is less, and perhaps, the oil smoke volume is less, and the great oil smoke volume of waiting of fan gear is unmatched with the situation of fan gear.

Generally, when the cooker is not used, even if the temperature sensing device is covered by dirt or the upper cover of the cooker is opened or covered, the temperature is stable, and the change in the set time is small; during the use of the cooker, the following conditions can be experienced: firstly, a detection area is in a high-temperature interval, and the detection area is rapidly cooled at the moment when food to be cooked is put into a pot, so that large oil smoke can be generated due to large temperature difference; secondly, the detection area is in a medium-temperature or low-temperature interval, and at the moment when food to be cooked is put into the pot, the detection area is cooled, the temperature difference is small, and small oil smoke is generated; the detection area is in a high-temperature range, when a pot cover is opened to check the cooking state of food or taste the food, the temperature of the detection area rises rapidly, the temperature difference is large, and large smoke is generated; and fourthly, the detection area is in a medium temperature or low temperature range, when the pot cover is opened to check the cooking state of the food or taste the food, the temperature of the detection area rises but the temperature difference is small, and the generated smoke is small. Therefore, the change size and the change trend of the temperature of the cooker can be used as the standard for judging the oil smoke concentration or the oil smoke amount.

The invention integrates two parameter factors of oil smoke concentration and variation of kitchen range temperature, correspondingly controls and adjusts the gear of the fan, utilizes the variation of the kitchen range temperature to replace the kitchen range temperature as a reference factor for adjusting the gear of the fan, can prevent the error of oil smoke quantity judgment caused by the pollution of a temperature detection device by oil stains and the like or the inaccurate detection value caused by different kitchen range states, and can improve the accuracy of oil smoke judgment by combining the oil smoke concentration, thereby improving the matching degree of the actual oil smoke quantity and the gear output by the fan.

Further, as shown in fig. 2, the step S3 of correspondingly adjusting the gear of the fan according to the relationship between the variation of the oil smoke concentration and the temperature of the kitchen range and the gear of the fan includes the steps of,

s31, acquiring a first temporary gear of the fan according to the oil smoke concentration;

s32, acquiring a second temporary gear of the fan according to the variation of the temperature of the stove;

and S33, judging whether the two acquired temporary gears are the same, if so, controlling the fan to output the gear, otherwise, controlling the fan to output a first set gear.

Step S31 and step S32 may be performed simultaneously, or may be performed sequentially, that is, the first temporary gear of the fan is obtained first, and then the second temporary gear of the fan is obtained, or the second temporary gear of the fan is obtained first, and then the first temporary gear of the fan is obtained.

According to the invention, two temporary gears are correspondingly obtained according to the variation of the smoke concentration and the temperature of the stove, when the two obtained temporary gears are the same, the smoke volume judged according to the two obtained values is considered to be close, and then the two obtained values are considered to be accurate, and the corresponding fan gear can be output; when the two temporary gears are different, the oil smoke amount judged by the two acquisition values is considered to have a certain difference, and then one of the two acquisition values is considered to be inaccurate, and under the condition that which acquisition value is accurate cannot be judged, the preset gear in selection can be output, so that the degree of mismatch between the oil smoke amount and the gear of the fan is reduced.

The variation of the temperature of the cooker comprises the variation magnitude and the variation trend of the temperature of the cooker.

The step S2 of obtaining the variation of the stove temperature comprises the following steps,

s21, acquiring the stove temperature T1 at the first set time;

s22, acquiring the stove temperature T2 at a second set time;

s23, controlling and calculating the difference value delta T between the stove temperature T2 of the second set time and the stove temperature T1 of the first set time;

s24, controlling and calculating the absolute value of the difference value, and determining the change size of the temperature of the stove;

and S25, judging whether the difference value is positive or negative, and determining the variation trend of the temperature of the cooker.

The steps S24 and S25 may be performed simultaneously or sequentially, that is, the absolute value of the difference is calculated and then the positive or negative of the difference is determined, or the positive or negative of the difference is determined and then the absolute value of the difference is calculated.

Further, the mode of acquiring the second temporary gear of the fan according to the variation of the temperature of the cooker comprises the following steps,

the change of the temperature of the cooker is divided into a plurality of change intervals, and a third temporary gear is correspondingly set in each change interval.

Step S241 of judging a change interval in which the change size of the temperature of the stove is positioned after the step S24, and acquiring a third temporary gear corresponding to the change interval;

step S242 is also performed after the step S241, the change trend of the temperature of the cooker is judged, and if the temperature is in the rising trend, the third temporary gear is selected as a second temporary gear; and if the temperature is in a descending trend, increasing a second set gear as a second temporary gear on the basis of the third temporary gear.

As an embodiment, the variation interval includes [ [ 0 ], | Δ T1 | ], (| Δ T1 |, | Δ T2 |), | Δ T2 |, | Δ T3 |), | Δ T3 |, + ∞. The values of Δ T1, Δ T2, and Δ T3 may be set according to actual needs.

As an embodiment, the third temporary gear includes a small gear, a medium gear and a large gear; the second set gear is one gear. The second temporary gear comprises a small gear, a medium gear, a large gear and a high-speed gear. That is, if Δ Tn (n is 1, 2, or 3) is negative in addition to the third temporary gear, that is, if it is determined that the temperature is in the downward trend, the third temporary gear is added by one gear, for example, if the third temporary gear selects a low gear, the second temporary gear selected is a medium gear; otherwise, the third temporary gear is selected as a second temporary gear.

By adopting the scheme, the variation trend and the variation parameter factor of the temperature of the cooker are integrated, the second temporary gear is correspondingly selected, the accuracy of oil smoke judgment according to the temperature of the cooker can be improved, and the matching degree of the second temporary gear and the oil smoke amount is further improved.

Similar to the manner of acquiring the second temporary gear of the fan, the manner of acquiring the first temporary gear of the fan according to the oil smoke concentration comprises the steps of dividing the oil smoke concentration into a plurality of intervals, and correspondingly setting a temporary gear in each concentration interval; and judging the concentration section in which the oil smoke concentration is positioned, and controlling and selecting a temporary gear corresponding to the concentration section.

Specifically, the concentration range includes [ 0, N1 ], (N1, N2), [ N2, N3 ], [ N3, N4 ], [ N4, + ∞). The values of N1, N2, N3 and N4 can be set according to actual needs.

As an embodiment, the first temporary gear includes a small gear, a medium gear, a large gear, and a high gear.

As a preferable scheme, when the acquired first temporary gear and the second temporary gear are different, the fan is controlled to output a wind gear.

Further, the first temporary gear, the second temporary gear and the third temporary gear further comprise a zero gear, namely a gear in which the fan is not started.

As an implementation scheme, the invention discloses a method for adjusting gears of a range hood, which comprises the following steps:

when the oil smoke concentration is more than or equal to 0 and less than or equal to N1, the range hood is not required to be started, and the zero wind gear of the selected fan is selected;

when the oil smoke concentration N2 is more than N and more than N1, the first temporary gear of the selected fan is a small wind gear;

when the oil smoke concentration N3 is more than or equal to N2, the first temporary gear of the selected fan is a medium wind gear;

when the oil smoke concentration N4 is more than or equal to N3, the first temporary gear of the selected fan is a large wind gear;

when the oil smoke concentration N is larger than or equal to N4, the first temporary gear of the selected fan is a top-speed gear;

when the temperature change is more than or equal to 0 and less than or equal to |. T1 |, the range hood does not need to be started, and the third temporary gear of the selected fan is a zero wind gear;

when the temperature change size | Δ T2 | > | Δ T1 |, the third temporary gear of the fan is a small wind gear;

when the temperature change size | Δ T3 | > | Δ T2 |, the third temporary gear of the fan is the neutral gear;

when the temperature change size |. DeltaT |. DeltaT 3 |, the third temporary gear of the fan is selected to be a large wind gear;

and the second temporary gear is selected to be maintained on the basis of the third temporary gear according to the rising or falling trend of the positive and negative judgment temperature of the variable quantity or to be increased by one gear on the basis of the third temporary gear.

If the first temporary gear and the second temporary gear both select a zero wind gear, the fan outputs the zero wind gear, namely the fan is not started;

if only one temporary gear of the first temporary gear and the second temporary gear selects a zero wind gear, the fan outputs the lowest gear, namely a starting gear, and the starting gear is smaller than the small wind gear;

if the first temporary gear and the second temporary gear do not select the zero wind gear and the two temporary gears are the same, the fan outputs the gear, otherwise, the medium wind gear is output.

That is, step S3 is performed before the gear of the fan is adjusted according to the relationship between the variation of the oil smoke concentration and the temperature of the kitchen range and the gear of the fan, step S30 is performed, and when the variation of the obtained oil smoke concentration and/or the temperature of the kitchen range is larger than respective preset values, the fan is controlled to be started. When only one of the oil smoke concentration and the temperature change of the kitchen range is larger than a preset value, controlling a fan to start and operate according to a set lowest gear, and when the oil smoke concentration and the temperature change of the kitchen range are both larger than the respective preset values, executing the next step; the lowest gear is a starting gear of the fan.

Further, when only the temperature reaches the set value in the detection, and the detection temperature rise duration is longer than the set time, the fan is controlled to be started. This is because the oil smoke will only appear when the temperature of the cooker rises to a certain value.

According to the method for adjusting the gear of the range hood, disclosed by the invention, as the middle gear basically belongs to the selected middle gear, when the selected first temporary gear and the selected second temporary gear are different, the middle gear is output, so that the requirements of oil smoke on wind power can be basically met, and excessive waste of resources can be prevented.

In addition, because the obtained variation of the oil smoke concentration and the kitchen range temperature is almost two values which change at two moments, if each obtained value corresponds to a temporary gear, on one hand, the range hood needs to have a huge database, which increases the difficulty of production and manufacturing, and on the other hand, the range hood can be in a state of changing gears at one moment, which causes resource waste and reduces the service life of the range hood. The range hood divides the change of the oil smoke concentration and the temperature of the range into a plurality of change intervals and change intervals, can reduce the workload of technicians to a certain extent, can prevent the range hood from changing the gear of the fan all the time, and saves energy consumption.

The first setting time and the second setting time can be set according to actual needs.

Further, the first set time and the second set time are time points respectively, and the difference value of the temperatures of the cookers at the two time points is controlled and calculated.

In one embodiment, the first set time is a current time point, the second set time is a next second time point, the variation of the cooker temperature is a difference value obtained by subtracting the temperature at the current time point from the temperature at the next second, the positive and negative of the difference value represent the variation trend of the temperature, and the absolute value of the difference value represents the variation magnitude of the temperature.

Or, the first set time and the second set time are time intervals respectively, and the obtained variation of the temperature of the cooking stove refers to variation of the temperature of the cooking stove in a first set time range and a second set time range before the second temporary gear of the fan is obtained.

The mode of acquiring the variation of the temperature of the cooker comprises the steps of respectively controlling and calculating the average value of the temperature of the cooker in a first set time range and a second set time range; and controlling and calculating the difference value of the average values of the temperatures of the two cookers to obtain the variation of the temperatures of the cookers.

As an embodiment, the first set time is a time interval formed by the current time t and the last three seconds time t +3, namely (t, t + 3); the second set time is a time interval formed by the last three seconds t +3 of the current time and six seconds after the current time, namely (t +3, t + 6); the variation of the stove temperature is the difference obtained by subtracting the average value of the stove temperature at the first set time from the average value of the stove temperature at the second set time, the positive and negative of the difference represent the variation trend of the temperature, and the absolute value of the difference represents the variation magnitude of the temperature.

Furthermore, the value taking modes in the two set time ranges comprise that a temperature value is taken at preset time intervals; preferably, the preset time set corresponding to the two set time ranges is the same.

As an embodiment, the values in the first set time and the second set time are both obtained by taking one temperature value every 1 second.

According to the method for adjusting the gear of the range hood, two set times can be selected according to actual needs, namely a time point or a time interval, so that the acquisition mode of the variation of the temperature of the range is increased, and the acquisition range of the variation of the temperature of the range is expanded.

As shown in fig. 3, another object of the present invention is to provide a range hood, which is used for implementing the above range hood gear adjusting method.

The range hood comprises a fan 2, a smoke detection device 3, a temperature detection device 4 and a central control unit 1; the central control unit 1 comprises a first signal receiving module 11 for receiving the parameter information of the oil smoke concentration; the second signal receiving module 12 is used for receiving parameter information of the temperature of the stove; the calculation module 15 is used for calculating the average value and the difference value of the temperatures of the cookers at the two set times and the absolute value of the difference value according to the received parameter information of the temperatures of the cookers at the two set times to obtain the change magnitude of the temperature of the cookers; the first judging module 13 is configured to judge a concentration range in which the oil smoke concentration is located and a change range in which the change of the temperature of the cooking appliance is located according to the oil smoke concentration and the change parameter information of the temperature of the cooking appliance; the second judging module 17 is used for judging the change trend of the temperature of the stove according to the positive and negative of the difference value; the first selection module 14 correspondingly selects a first temporary gear and a second temporary gear according to a concentration range in which the oil smoke concentration is located, a change range in which the change magnitude of the temperature of the stove is located, and a change trend of the temperature of the stove; a third judging module 19, configured to judge whether the selected first temporary gear and the second temporary gear are the same; the second selection module 18 selects a gear to be output by the fan 2 according to the result of judging whether the first temporary gear and the second temporary gear are the same; and the signal sending module 16 is at least used for sending the gear information which is to be output by the selected fan 2 to the fan 2.

The working principle is as follows: as shown in fig. 3, the smoke detecting device 3 detects the concentration of oil smoke in the kitchen and sends the oil smoke to the first signal receiving module 11; the temperature detection device 4 detects the temperature of the kitchen range in the kitchen and sends the temperature to the second signal receiving module 12; the second signal receiving module 12 sends the parameter information of the stove temperature to the calculating module 15, and the calculating module 15 calculates the average value, the difference value and the absolute value of the stove temperature at two set times according to the received parameter information of the stove temperature at two set times, or directly calculates the difference value and the absolute value; then the first signal receiving module 11 and the calculating module 15 respectively send the parameter information of the oil smoke concentration and the change magnitude of the temperature of the kitchen range to the first judging module 13, the calculating module 15 sends the positive and negative information of the calculated difference value to the second judging module 17, the first judging module 13 judges whether the oil smoke concentration and the change magnitude of the temperature of the kitchen range meet the starting standard of the fan 2, if so, the concentration interval in which the oil smoke concentration is located and the change interval in which the change magnitude of the temperature of the kitchen range is located are judged, and then the judgment result is sent to the first selecting module 14; the second judging module 17 judges the variation trend of the temperature of the cooker according to the positive and negative information of the difference value, and then sends the judgment result to the first selecting module 14; the first selection module 14 correspondingly selects a first temporary gear according to a concentration interval in which the oil smoke concentration is located, corresponds to a third temporary gear according to the change magnitude of the temperature of the stove, then determines a selected second temporary gear on the basis of the third temporary gear according to the change trend of the temperature of the stove, and sends a selection result to the third judgment module 19; when the third judging module 19 judges that the first temporary gear and the second temporary gear are the same, the third judging module sends the judgment result to the second selecting module 18, and the second selecting module 18 selects the gear; when the second judging module 17 judges that the first temporary gear and the second temporary gear are different, the judgment result is sent to the second selecting module 18, and the second selecting module 18 selects a set gear; and then the second selection module 18 sends the selection result to the signal sending module 16, the signal sending module 16 sends the selection result to the fan 2, and the fan 2 outputs the gear to realize control and adjustment of the range hood gear.

Although the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A method for adjusting the gear of a range hood is characterized by comprising the following steps,

acquiring the concentration of oil smoke;

acquiring the variation of the temperature of the stove;

and correspondingly adjusting the gear of the fan according to the relation between the variation of the oil smoke concentration and the temperature of the stove and the gear of the fan.

2. The method for adjusting the gear of the range hood according to claim 1, wherein the step of correspondingly adjusting the gear of the fan according to the relationship between the variation of the oil smoke concentration and the temperature of the kitchen range and the gear of the fan comprises the steps of,

acquiring a first temporary gear of the fan according to the oil smoke concentration;

acquiring a second temporary gear of the fan according to the variation of the temperature of the stove;

and judging whether the two acquired temporary gears are the same, if so, controlling the fan to output the gear, and otherwise, controlling the fan to output a first set gear.

3. The method for adjusting the gear of the range hood according to claim 1 or 2, wherein the variation of the range temperature comprises variation magnitude and variation trend of the range temperature.

4. The method for adjusting the gear of the range hood according to claim 3, wherein the manner of obtaining the second temporary gear of the fan according to the variation of the temperature of the range includes,

dividing the change size of the temperature of the stove into a plurality of change intervals, and correspondingly setting a third temporary gear in each change interval;

judging a change interval in which the change size of the temperature of the stove is positioned, and acquiring a third temporary gear corresponding to the change interval;

judging the variation trend of the temperature of the cooker, and if the temperature is in an ascending trend, selecting the third temporary gear as a second temporary gear; if the temperature is in a descending trend, a second set gear is added on the basis of the third temporary gear to serve as a second temporary gear;

preferably, the second set gear is one gear.

5. The method for adjusting the gear of the range hood according to claim 2, wherein the manner of obtaining the first temporary gear of the fan according to the concentration of the oil smoke comprises,

dividing the oil smoke concentration into a plurality of intervals, and setting a temporary gear for each concentration interval;

and judging the concentration section in which the oil smoke concentration is positioned, and controlling and selecting a temporary gear corresponding to the concentration section.

6. The range hood gear adjusting method according to any one of claims 2 to 5, wherein the obtained variation of the range temperature refers to variation of the range temperature in a first set time range and a second set time range before a second temporary gear of the fan is obtained.

7. The method for adjusting the gear of the range hood according to claim 6, wherein the manner of obtaining the variation of the temperature of the range includes,

respectively controlling and calculating the average value of the temperature of the kitchen range within a first set time range and the average value of the temperature of the kitchen range within a second set time range;

and controlling and calculating the difference value of the average values of the temperatures of the two cookers to obtain the variation of the temperatures of the cookers.

8. The method for adjusting the gear of the range hood according to claim 6 or 7, wherein the value taking modes in the two set time ranges comprise that a temperature value is taken at preset time intervals;

preferably, the preset time set corresponding to the two set time ranges is the same.

9. A range hood, characterized by being used for implementing a method for adjusting a gear of the range hood as claimed in any one of claims 1 to 8.

10. The range hood of claim 9, comprising a fan, a smoke detection device, a temperature detection device and a central control unit;

the central control unit comprises a central control unit which comprises,

the first signal receiving module is used for receiving the parameter information of the oil smoke concentration;

the second signal receiving module is used for receiving the parameter information of the temperature of the cooker;

the calculation module can calculate the average value and the difference value of the temperatures of the cooking utensils at two set times and the absolute value of the difference value according to the received parameter information of the temperatures of the cooking utensils at the two set times, so as to obtain the change magnitude of the temperatures of the cooking utensils;

the first judgment module is used for judging a concentration interval in which the oil smoke concentration is positioned and a change interval in which the change of the temperature of the stove is positioned according to the oil smoke concentration and the parameter information of the change of the temperature of the stove;

the second judgment module is used for judging the change trend of the temperature of the stove according to the positive and negative of the difference value;

the first selection module correspondingly selects a first temporary gear and a second temporary gear according to a concentration range in which the oil smoke concentration is located, a change range in which the change magnitude of the temperature of the stove is located and the change trend of the temperature of the stove;

the third judgment module is used for judging whether the selected first temporary gear and the second temporary gear are the same or not;

the second selection module is used for selecting the gear to be output by the fan according to the result of judging whether the first temporary gear and the second temporary gear are the same or not;

and the signal sending module is at least used for sending the gear information to be output by the selected fan to the fan.

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