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CN-122015143-A - Control method of range hood

CN122015143ACN 122015143 ACN122015143 ACN 122015143ACN-122015143-A

Abstract

The control method of the range hood comprises a shell, wherein a range hood fan is arranged in the shell, the lower part of the shell is arranged at a left air inlet and a right air inlet, a left smoke guide plate is arranged at the left air inlet, a right smoke guide plate is arranged at the right air inlet, and an air quality sensor capable of detecting the concentration of oil smoke is arranged on the left side wall or the right side wall of the shell. According to the range hood, the air quality sensor is arranged on the side wall of the shell, and after flow distribution and gear compensation are carried out according to different cooking position probabilities, the control method can improve the oil smoke locking capacity of the double-range cooker when the double-range cooker is used simultaneously, reduce oil smoke escape, improve the intelligent degree of the range hood, enable the range hood to intelligently judge cooking scenes and improve user cooking experience.

Inventors

  • LIU JIE
  • HE LIBO
  • YE FENG

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260512
Application Date
20260108

Claims (10)

  1. 1. A control method of a range hood comprises a shell (1), wherein a range hood fan (2) is arranged in the shell (1), the lower part of the shell (1) is arranged at a left air inlet and a right air inlet, a left smoke guide plate (3) is arranged at the left air inlet, and a right smoke guide plate (4) is arranged at the right air inlet.
  2. 2. The method for controlling a range hood according to claim 1, wherein the step of calculating the cooking position probability based on the concentration variation gradient is as follows: S11, detecting a concentration change event by an air quality sensor (5); s12, the controller calculates concentration gradient change; s13, judging whether the concentration gradient change is larger than a threshold value; If yes, the event time is recorded, and the step S14 is carried out; If not, continuing to monitor; S14, comparing historical data; s15, calculating the position probabilities of left side cooking and right side cooking of the kitchen range.
  3. 3. The method according to claim 2, wherein in step S15, a position probability model is defined: , wherein, A left cooking location probability; as the weight of the time in question, ; ( ) As a time matching function, if | - I <3min, then Otherwise, 0; Is the current event timestamp; average time of historical event, and k is sequence number of historical event.
  4. 4. The method for controlling a range hood according to claim 1, wherein the step of calculating the cooking position probability based on the sensor response time difference is as follows: s21, acquiring the ignition time t0 of the cooker; S22, detecting response time t1 of the air quality sensor (5); S23, calculating ; S24, judging Whether the threshold value is not more than or equal to the established value; if yes, judging that the main cooking on the left side of the kitchen range is performed; if not, judging that the main cooking is performed on the right side of the kitchen range.
  5. 5. The method of controlling a range hood according to claim 1, wherein the flow distribution of the left air inlet and the right air inlet is achieved by adjusting the opening degrees of the left smoke guide plate (3) and the right smoke guide plate (4), and the opening degree of the left smoke guide plate (3) is expressed as a formula The opening degree of the right smoke-guiding plate (4) is expressed as , wherein, In order to preset the basic opening of the smoke guide plate, As the gain factor of the gain factor, Single-side smoke guide plate the minimum opening is more than or equal to 10 percent.
  6. 6. The method for controlling a range hood according to claim 5, wherein the flow distribution based on the concentration gradient comprises the steps of: S31, starting a system; s32, preheating an air quality sensor (5); s33, outputting pollutant concentration by an air quality sensor (5); s34, calculating a concentration change gradient; S35, judging whether the concentration change gradient is larger than a set threshold value; If yes, recording a time stamp, and typing in a step S36; If not, the opening degree of the left smoke guide plate (3) and the right smoke guide plate (4) is maintained, and the state of the oil smoke suction fan (2) is maintained; s36, inquiring the database and calculating ; S37, calculating the opening degree of the left smoke guide plate (3) and the right smoke guide plate (4); s38, adjusting the opening of the smoke guide plate to adjust the flow; S39, waiting for the next period.
  7. 7. The method for controlling a range hood according to claim 5, wherein the flow distribution based on the sensor response time difference comprises the steps of: s41, igniting the stove; s42, starting timing and acquiring the ignition time t0 of the cooker; S43, judging whether the concentration change gradient is larger than a set threshold value; if yes, recording response time t1 of the air quality sensor (5), and then proceeding to step S44; If not, continuing to monitor; S44, calculating the time difference ; Judging Whether the threshold value is not more than or equal to the established value; if yes, judging that the cooking is left main cooking, and then entering step S45; If yes, the right main cooking is judged, and then the step S46 is carried out; s45, the opening of the left oil guide plate is 50% +x%, and the opening of the right smoke guide plate (4) is 50% -x%; s46, the opening of the right oil guide plate is 50% +x%, and the opening of the left smoke guide plate (3) is 50% -x%; Wherein x is more than or equal to 15 and less than or equal to 25.
  8. 8. The control method of a range hood according to claim 1, wherein the air volume shift compensation includes the steps of: S51, starting a system; s52, preheating an air quality sensor (5); s53, outputting pollutant concentration by the air quality sensor (5); s54, calculating a concentration change gradient; S55, judging whether the concentration change gradient is larger than a set threshold value; If yes, recording a time stamp, and typing in a step S56; if not, the opening degree of the left smoke guide plate (3) and the right smoke guide plate (4) is maintained, and the current gear of the range hood is maintained; s56, inquiring the database, and calculating ; S57, comparing the cooking position probabilities of the left side and the right side, and outputting a main cooking direction; s58, inquiring whether the airflow interference source side is consistent with the main cooking side; if yes, the range hood keeps the current gear, and then step S59 is carried out; if not, the range hood is lifted, and then step S59 is carried out; S59, waiting for the next detection period.
  9. 9. The control method of the range hood according to claim 1, wherein the range hood comprises an upper box body (11) and an air inlet body (12), the range hood fan (2) is arranged in the upper box body (11), a left air inlet and a right air inlet are formed in the air inlet body (12), and the left smoke guide plate (3) and the right smoke guide plate (4) are arranged on the air inlet body (12).
  10. 10. The control method of the range hood according to claim 9, wherein the left outer side wall or the right outer side wall of the air inlet body (12) is provided with an installation cavity (6), the air quality sensor (5) is installed inside the installation cavity (6), and an oil-proof assembly (7) is installed at an opening of the installation cavity (6).

Description

Control method of range hood Technical Field The invention relates to an oil smoke purifying device, in particular to a control method of a range hood. Background With the improvement of the living standard and the enhancement of health consciousness of people, the influence of kitchen air quality on human health is increasingly focused. The range hood is used as a key electrical appliance for exhausting oil smoke in a kitchen, the function of the range hood is not limited to the simple oil smoke exhaust, more and more range hoods begin to integrate an air monitoring function, such as being provided with air households and other systems, so as to monitor TVOC (total volatile organic compounds), PM2.5 and other pollutants and other peculiar smells in the kitchen environment, automatically adjust the running state of the range hood, meet the requirements of users on the healthy environment of the kitchen, and build a healthier and comfortable cooking environment. However, related products in the current market still have a plurality of technical defects to be solved in the aspects of sensor arrangement, oil smoke control effect, intelligent function realization and the like, and the requirements of users on healthy cooking experience and efficient equipment utilization are difficult to meet. First, on a sensor mounting layout for monitoring cooking related parameters, existing manufacturers generally place such sensors near a front panel or an air intake of a cabinet of a range hood. Although the mounting mode is convenient for the sensor to sense the dynamics of the cooking area to a certain extent, a large amount of greasy dirt generated in the cooking process is easily attached to the surface of the sensor due to the fact that the distances between the front panel and the air inlet and the cooking area are too short, so that the sensor is polluted. Through practical test verification, the sensor in this region receives the greasy dirt influence, and life is shorter, not only needs the frequent sensor of changing in order to maintain equipment normal function of user, has increased use cost, still probably leads to the unable accurate response culinary art demand of lampblack absorber because of the sensor inefficacy, influences the oil smoke purifying effect. Secondly, the current mainstream smoke ventilator has major defects in the aspects of smoke control and intelligent adaptation, namely firstly, under the scene that double stoves are used simultaneously, the smoke capturing capacity of the current smoke ventilator is insufficient, and the escape rate of the smoke is more than 30%. A large amount of uncollected oil smoke diffuses into a kitchen space, so that indoor air can be polluted, potential threat to respiratory system health of a user can be caused, meanwhile, difficulty in kitchen cleaning can be increased, a physical baffle arranged for improving oil smoke capturing efficiency cannot be automatically adjusted according to dynamic change of a main cooking area, and a part of manufacturers try to adopt a technical scheme of camera monitoring for realizing the positioning function of the main cooking area, but serious privacy leakage risk exists in the scheme. Disclosure of Invention The invention aims to solve the technical problem of providing a control method of a range hood capable of intelligently identifying a main cooking direction of a user and performing self-adaptive intelligent adjustment on air quantity. The control method is characterized in that an air quality sensor capable of detecting the oil smoke concentration is arranged on the left side wall or the right side wall of the shell, and the control method can obtain the position probability of cooking on the left side and the right side of the kitchen range by calculating the concentration change gradient or the sensor response time difference, so that the flow of the left air inlet and the right air inlet is distributed or the air quantity gear is compensated. As a preferred embodiment, the step of calculating the cooking position probability based on the concentration variation gradient is as follows: S11, detecting a concentration change event by an air quality sensor; s12, the controller calculates concentration gradient change; s13, judging whether the concentration gradient change is larger than a threshold value; If yes, the event time is recorded, and the step S14 is carried out; If not, continuing to monitor; S14, comparing historical data; s15, calculating the position probabilities of left side cooking and right side cooking of the kitchen range. Further preferably, in step S15, a position probability model is defined: , wherein, A left cooking location probability; as the weight of the time in question, ;() As a time matching function, if |-I <3min, thenOtherwise, 0; Is the current event timestamp; average time of historical event, and k is sequence number of historical event. As another preferred scheme, the step of