CN110220232B - A method for controlling the wind speed gear of a range hood and a range hood - Google Patents

Abstract

The invention provides a method for controlling the wind speed gear of a range hood and a range hood, and relates to the technical field of range hoods, including: detecting the current central smoke inlet smoke concentration Ca and the side smoke inlet smoke concentration Cb; The smoke concentration Ca of the central smoke inlet, the smoke concentration Cb of the side smoke inlets, the first threshold C1 and the second threshold C2 are used to control the wind speed gear of the current range hood. The method for controlling the wind speed gear of the range hood and the range hood according to the present invention are simple in the judgment method, and the wind speed gear of the range hood can be more reasonably controlled by judging the smoke concentration and the preset threshold, so as to improve the suction of the range hood. The independent control ability of the machine can prevent the smoke from overflowing and pollute the indoor environment when the smoke volume is large and the wind speed is small; and the waste of electric energy when the smoke volume is small and the wind speed is large.

Description

A method for controlling the wind speed gear of a range hood and a range hood

technical field

The invention relates to the technical field of range hoods, in particular to a method for controlling the wind speed gear of a range hood and a range hood.

Background technique

With the improvement of people's quality of life, people's requirements for the function of kitchen appliances and the kitchen environment are becoming more and more strict, especially the requirements for range hoods. At present, most of the smoke inlets of the existing range hoods are located in the center of the smoke collecting plate of the range hood or directly above the gas stove. At the same time, the amount of range hood is limited, and the spilled smoke will spread to the surrounding area, affecting the indoor air and environmental quality. .

On the other hand, most of the existing range hoods cannot automatically control the air volume, and it is inconvenient for users to adjust the air range of the range hood when using; result in a waste of electricity.

It can be seen that it is necessary to optimize the design of the existing range hood.

SUMMARY OF THE INVENTION

The problem solved by the invention is that the existing range hood cannot automatically adjust the wind speed position, the smoke volume is large and the wind speed is small, causing the smoke to overflow and pollute the indoor environment;

In order to solve the above problems, the present invention provides a range hood, which includes a central smoke inlet and a side smoke inlet, the central smoke inlet is located in the center of the smoke collecting plate, and the side smoke inlet is located at the smoke collecting plate. side of the board. By arranging the smoke inlets at the center and the side of the smoke collecting plate at the same time, the oil fume can be better absorbed.

Optionally, there are multiple side smoke inlets, and the distances between the plurality of side smoke inlets and the central smoke inlet are equal. It can further suck and remove the side oil fume in multiple directions of the fume collecting plate to prevent the smoke from leaking from the side.

Optionally, it also includes a control device, and the control device includes:

a detection unit, the detection unit is used to detect the current central smoke inlet smoke concentration Ca and the side smoke inlet smoke concentration Cb;

A control unit, the control unit is used to determine the wind speed gear of the current range hood according to the smoke concentration Ca of the central smoke inlet, the smoke concentration Cb of the side smoke inlets, the first threshold C1 and the second threshold C2 For control, the control device is simple and easy to implement. Through the judgment of the smoke concentration and the preset threshold, the wind speed gear of the range hood is more reasonably controlled, which improves the independent control ability of the range hood and prevents the smoke volume from being large and the wind speed being small. , causing the smoke to overflow and pollute the indoor environment; and to prevent the waste of electric energy when the amount of smoke is small and the windshield is large.

Optionally, the detection unit includes a smoke detection sensor, there are multiple smoke detection sensors, and a plurality of the smoke detection sensors are respectively disposed at the central smoke inlet (1) and the side smoke inlets. At (2), the lateral concentration Cb is monitored by multiple smoke sensors, and the detection is more accurate.

Optionally, the control unit is further configured to calculate and obtain the maximum side smoke inlet smoke concentration Cbmax among the plurality of side smoke inlet smoke concentrations Cb, and control the windshield of the range hood through the maximum concentration. , more precise.

The present invention also provides a method for controlling the wind speed gear of the range hood, comprising:

Detect the current central smoke inlet smoke concentration Ca and side smoke inlet smoke concentration Cb;

The wind speed gear of the current range hood is controlled according to the smoke concentration Ca of the central smoke inlet, the smoke concentration Cb of the side smoke inlets, the first threshold C1 and the second threshold C2.

The judgment method is simple. Through the judgment of the smoke concentration and the preset threshold, the wind speed gear of the range hood is more reasonably controlled, and the independent control ability of the range hood is improved to prevent the smoke from overflowing due to the large amount of smoke and the small wind speed. Pollute the indoor environment; and prevent the waste of electric energy when the amount of smoke is small and the windshield is large.

Optionally, there are multiple side smoke inlet smoke concentrations Cb, and the maximum side smoke inlet smoke concentration Cbmax among the multiple side smoke inlet smoke concentrations Cb is calculated and obtained, according to the central inlet smoke concentration Cbmax. The smoke concentration Ca of the smoke outlet, the smoke concentration of the maximum side smoke inlet Cbmax, the first threshold value C1 and the second threshold value C2 are used to control the wind speed gear of the current range hood, and the detection of smoke is more accurate, The self-control process is more reasonable and precise.

Optionally, after the central smoke inlet smoke concentration Ca and the maximum side smoke inlet smoke concentration Cbmax are detected and calculated, a first judgment is performed, and the first judgment includes:

Determine whether the smoke concentration Cbmax of the maximum side smoke inlet is greater than the first threshold value C1, and if so, control the wind speed gear of the range hood to be high, and perform the first judgment again after running for a first time period t1; If not, execute the second judgment, control the wind speed gear of the range hood according to the result of the second judgment, first judge whether the smoke volume of the side air inlet is too high, if it is too high, it indicates that the smoke volume is large , the fan turns on the highest wind gear to increase the amount of oil smoke.

Optionally, the second judgment includes: judging whether the maximum side smoke inlet smoke concentration Cbmax is greater than the second threshold C2; After the time period t2, the first judgment is executed again; if not, the third judgment is executed, and the wind speed gear of the range hood is controlled according to the result of the third judgment, and the smoke from the side smoke inlet is combined with the second judgment. The threshold C2 value is used for evaluation. When the smoke volume of the side smoke inlet has a certain concentration but is not too large, the fan operates according to the mid-wind gear and performs reasonable control.

Optionally, the third judgment includes: judging whether the smoke concentration Ca of the central smoke inlet is greater than the second threshold value C2, and if so, controlling the wind speed gear of the range hood to be a low gear, and running for a third duration t3. Then perform the first judgment again; if not, control the wind speed gear of the range hood to a low gear, and turn off the fan of the range hood after running for a fourth period of time t4, and then pass the concentration of the central air inlet and the second threshold C2 Comparison and judgment, when the smoke concentration at the central air inlet is low, ensure that the overall smoke volume is low, turn off the range hood, and save electricity.

Optionally, the first threshold value C1 is greater than the second threshold value C2, so that in the judgment process, when the side smoke inlet is compared with the two values of C1, the wind speed of the fan can be divided into low wind speed, medium wind speed and high wind speed. three gears for control.

Optionally, before the detection of the smoke concentration Cb of the side smoke inlet, the current central smoke inlet smoke concentration Ca is detected, and a fourth judgment is performed, and the fourth judgment includes:

Determine whether the smoke concentration Ca of the central smoke inlet is greater than the second threshold value C2, if so, detect the smoke concentration Cb of the side smoke inlet, according to the smoke concentration Ca of the central smoke inlet, the side smoke inlet The smoke concentration Cb, the first threshold C1 and the second threshold C2 control the current wind speed gear of the range hood; if not, wait for the fifth time period t5, and then detect the current central smoke inlet smoke concentration again Ca, and re-enter the fourth judgment.

The automatic control of the opening of the range hood is realized, and the range hood can judge whether it is turned on or not according to the amount of smoke, which is more intelligent.

Description of drawings

1 is a schematic diagram of a range hood according to an embodiment of the present invention;

FIG. 2 is a flowchart 1 of a control method according to an embodiment of the present invention;

3 is a second flowchart of a control method according to an embodiment of the present invention;

FIG. 4 is a third flowchart of the control method according to the embodiment of the present invention.

Description of reference numbers:

1-central smoke inlet, 2-side smoke inlet, 21-first smoke inlet, 22-second smoke inlet, 23-third smoke inlet, 24-fourth smoke inlet.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "first", "second" and the like in various embodiments are only used for description purposes, and should not be construed as indicating or implying relative importance or implying indicated the number of technical characteristics. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature.

The present invention provides a range hood, as shown in FIG. 1 , including a range hood body, a central smoke inlet 1 and a side smoke inlet 2 are arranged on the range hood body, and the central smoke inlet 1 is arranged on the range hood body set. In the middle position of the smoke plate, the side smoke inlet 2 is arranged on the side of the smoke collecting plate of the range hood body. Well, there are four side smoke inlets 2, including a first smoke inlet 21, a second smoke inlet 22, a third smoke inlet 23 and a fourth smoke inlet 24. The four side smoke inlets are They are located at the four corners of the smoking board, which can absorb the smoke that falls to the four corners and the four sides, preventing the smoke from spreading from the sides and polluting the surrounding environment.

Optionally, the positions of the four side smoke inlets 2 can be adjusted according to specific conditions, for example, they can be arranged at the central positions of the four sides of the smoke collecting plate.

Preferably, the distances between the plurality of side smoke inlets 2 and the central smoke inlet 1 are equal, and the plurality of side smoke inlets 2 are distributed in a circular shape with the central smoke inlet 1 as the center of the circle, which is more beautiful in appearance and can be The smoke diffused around the central smoke inlet 1 is better suctioned and removed, and the suction efficiency of the smoke is improved.

In the present invention, a plurality of smoke inlets are arranged, and a central smoke inlet and a side smoke inlet are arranged at the same time, and the concentrated area of smoke is sucked through the central smoke inlet, and the smoke diffused to the surrounding is eliminated through the side smoke inlet. By suction and removal, the smoke treatment capacity doubles in the same time, avoiding the overflow of smoke caused by insufficient smoke treatment capacity, and improving the working efficiency and environmental quality of the range hood.

In order to better reasonably control the oil absorption of the range hood and realize the automatic control of the range hood according to the amount of smoke, this embodiment also provides a control device for the range hood, the control device includes: a detection unit and a control device unit, the detection unit is used to detect the current smoke concentration Ca of the central smoke inlet 1, and to detect the smoke concentration Cb of the side smoke inlet 2, and transmit the smoke concentration Ca and the smoke concentration Cb to the control unit; the control unit uses After receiving the smoke concentration Ca and the smoke concentration Cb, and according to the smoke concentration Ca, the smoke concentration Cb, the first threshold C1 and the second threshold C2, the wind speed gear of the current range hood is controlled. Specifically, the first threshold C1 and the The second threshold C2 is a preset value set in the control unit, wherein the first threshold C1 is greater than the second threshold C2.

The detection unit includes smoke detection sensors, there are five smoke detection sensors, and the five smoke detection sensors are respectively arranged at the central smoke inlet 1 and the other four side smoke inlets 2. It should be noted that when the side smoke When the number of smoke inlets 2 changes, a smoke detection sensor is set according to the side smoke inlets 2 to ensure that each central smoke inlet 1 and side smoke inlets 2 are provided with smoke detection sensors.

The control unit specifically includes an analog-to-digital signal conversion module, a data processing module and a fan drive control module. Specifically, the analog signal conversion module converts the smoke concentration analog signal received by the control unit into a digital signal, and converts the conversion through the data processing module. The resulting digital signal is processed, and through the comparison with the threshold value, the fan gear of the range hood is regulated and controlled by the fan drive control module to control the wind speed of the fan.

Specifically, in the present invention, the smoke detection sensor and the control unit communicate by wired connection, the signal transmission is stable, and the price is low; It takes up less space, does not need wiring, and the internal design is more beautiful. The smoke detection sensor is powered by a button battery, which has the advantages of small size and low power consumption. The wireless communication connection can also avoid the situation that the line is damaged and affects the communication.

On the basis of the above control device, this embodiment also provides a method for controlling the wind speed gear of a range hood, which is shown in FIG. 2 , including detecting the current central smoke inlet smoke concentration Ca and the side smoke inlet According to the central smoke inlet smoke concentration Ca, the side smoke inlet smoke concentration Cb, the first threshold C1 and the second threshold C2, the wind speed gear of the current range hood is controlled.

It should be noted that, with reference to Fig. 3, when the number of side smoke inlets 2 is multiple, it is also necessary to detect the smoke concentrations Cb of multiple side smoke inlets, and calculate a plurality of smoke concentrations Cb through the data processing module. The maximum side inlet smoke concentration Cbmax in the side smoke inlet smoke concentrations Cb is based on the central smoke inlet smoke concentration Ca, the maximum side smoke inlet smoke concentration Cbmax, the first threshold C1 and all The second threshold C2 is used to control the current wind speed gear of the range hood, and the first threshold C1 is greater than the second threshold C2.

As shown in Figure 4, the specific method includes:

Step S1, detecting the current central smoke inlet smoke concentration Ca and multiple side smoke inlet smoke concentrations Cb;

Step S2, calculating and obtaining the maximum side smoke inlet smoke concentration Cbmax among the multiple side smoke inlet smoke concentrations Cb;

Step S3, firstly execute the first judgment, the first judgment is to judge whether the current maximum smoke concentration Cbmax of the side smoke inlet is greater than the first threshold value C1, if so, control the wind speed gear of the range hood to be high, and run for the first time period After t1, execute the first judgment again; if not, execute the second judgment;

The second judgment is to judge whether the smoke concentration Cbmax of the maximum side smoke inlet is greater than the second threshold value C2, and if so, control the wind speed gear of the range hood to be in the middle gear, and run the second time period t2 to execute the first step again. Judgment to prevent the amount of smoke from increasing during operation, while the range hood still operates in the mid-wind gear, and the smoke cannot be effectively sucked out; if not, execute the third judgment;

The third judgment is to judge whether the smoke concentration Ca of the central smoke inlet is greater than the second threshold value C2, if so, control the wind speed gear of the range hood to a low gear, and execute the first judgment again after running for a third time period t3, If not, control the fan speed gear of the range hood to a low gear, and turn off the fan after running for a fourth time period t4.

It should be noted that the first threshold C1 is greater than the second threshold C2, and Ca>Cbmax, the first duration t1 is in the range of 1-3 minutes, the second duration t2 is in the range of 1-3 minutes, and the third duration t3 is in the range of 1-3 minutes Within the range, the fourth time period t4 is within the range of 3 to 7 minutes.

Specifically, the first threshold value C1 and the second threshold value C2 are determined experimentally according to different models of range hoods. Before the range hood leaves the factory, conduct tests according to the model of the range hood, and determine the minimum value of the smoke concentration that needs to open the central smoke inlet as the second threshold C2. The value is determined as the first threshold value C1.

Preferably, after the fan is turned off and before detecting the smoke concentration Cb of the side smoke inlet, the current central smoke inlet smoke concentration Ca is detected, and a fourth judgment is performed, and the fourth judgment includes:

Determine whether the smoke concentration Ca of the central smoke inlet is greater than the second threshold value C2, if so, detect the smoke concentration Cb of the side smoke inlet, according to the smoke concentration Ca of the central smoke inlet, the side smoke inlet The smoke concentration Cb, the first threshold C1 and the second threshold C2 control the current wind speed gear of the range hood; if not, wait for the fifth time period t5, and then detect the current central smoke inlet smoke concentration again Ca, and re-enter the fourth judgment.

The automatic control of the opening of the range hood is realized, and the range hood can judge whether it is turned on or not according to the amount of smoke, which is more intelligent.

The method for controlling the wind speed gear of the range hood of the present invention, according to the detected smoke concentration data at different positions, through the controller, the wind speed of the fan is automatically adjusted in real time, and the reasonable wind speed is selected according to different smoke concentrations, which increases the The user's comfort level can also effectively prevent the fan speed from being too large when the amount of smoke is small, resulting in power loss, and improve the service life of the fan. of removal.

Specifically, during the operation of the method for controlling the fan speed gear of the range hood, when the user-operated command to turn off the range hood is received, the control method is exited and the fan is turned off, so as to prevent the range hood from still running when the user turns off the range hood, The user mistakenly believes that the hood is damaged.

Preferably, during the operation of the method for controlling the wind speed gear of the range hood, when the user-operated range hood closing command is received for the first time, it is detected whether the smoke concentration Ca of the central smoke inlet is zero, If yes, exit the control method and turn off the fan; if not, continue the control method and send an alarm signal to control the range hood to display an alarm to remind the user that there is still a certain amount of smoke, and turning off the fan will cause the smoke to overflow until it is closed again. instruction.

Preferably, an automatic control button is set on the control panel of the range hood, and an automatic control program is built into the control unit. When the user selects the automatic control program, the detection unit detects the smoke concentration Ca of the central smoke inlet in real time, and reports the smoke concentration Ca in the central smoke inlet in real time. When the smoke concentration Ca is greater than zero, enter the control method of the fan speed gear of the range hood, and turn off the range hood when the user actively turns off the range hood, or when it is detected that the smoke concentration Ca of the central smoke inlet is zero. When the user exits the automatic control program when the range hood enters the control method, it is better not to exit the control method, and wait for the user to actively turn off the range hood, or turn off the range hood when the smoke concentration Ca of the central smoke inlet is detected to be zero. Then carry out the automatic control program to prevent the withdrawal of the automatic control program from closing the oil suction process.

Preferably, in the automatic control program, the running time of the automatic control program or the fifth duration t5 of the time for detecting the smoke concentration Ca of the central smoke inlet can be selected according to the cooking time of the user, such as when the user usually cooks at 6:00. ～9:00, 11:00～13:00, 16:00～18:00, the automatic control program can be run, or the fifth time t5 for detecting the smoke concentration Ca of the central smoke inlet is shorter, preventing During the non-cooking time period, the range hood runs by itself, which affects the user's experience and comfort; optionally, the frequent cooking time can be set by the user, and during the process of starting the automatic control program, the user manually turns on the fan and automatically controls The program does not exit, and will still enter the control method of the fan speed gear of the range hood.

In the present invention, preferably, according to the control method of the temperature of the gas stove head below the range hood, whether it is necessary to enter the wind speed gear of the range hood, a temperature sensor is set to detect the stove head temperature Ta, and it is judged whether the stove head temperature Ta is greater than The preset temperature T1, if it is, then when the range hood detects that the smoke concentration Ca of the central smoke inlet is greater than zero or the user turns on the range hood, the fan is turned on, and the control method of the fan speed gear of the range hood is entered; if not, the range hood is not controlled. Turn on the fan. Generally speaking, when the stove is not ignited, no smoke will be produced, and when the stove is turned off, smoke will also be produced, but the temperature of the stove will not drop below the preset temperature T1, so this method can easily Reasonable coverage of all time periods during which smoke is generated can effectively prevent the misjudgment of the range hood from causing the range hood to be turned on, so that users mistakenly believe that the range hood is faulty.

Better yet, it can also be controlled according to the temperature of the gas stove head below, whether the range hood needs to be turned off. During the operation of the range hood, it is judged whether the currently detected temperature Ta of the stove head is greater than the preset temperature T1, and if so, keep the range hood running. Do not turn off the fan; if not, turn off the range hood and exit the control method of the fan speed gear of the range hood. The judgment process of this method is accurate. When the stove head is lowered below the preset temperature T1, no more smoke will be generated, that is, the operation of the range hood is no longer required, the automatic control is more accurate, and it can effectively prevent the user from forgetting to turn off the oil fume after cooking. machine, resulting in waste of electricity, saving electricity.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (9)

1. A method for controlling the wind speed gear of a range hood, wherein the range hood comprises a central smoke inlet (1) and a side smoke inlet (2), and the central smoke inlet (1) is located in the center of the smoke collecting plate, and the side smoke inlet (2) is located at the side of the smoke collecting plate; The control method includes: detecting the current central smoke inlet smoke concentration Ca and the side smoke inlet smoke concentration Cb; According to the smoke concentration Ca of the central smoke inlet, the smoke concentration Cb of the side smoke inlet, the first threshold C1 and the second threshold C2, the wind speed gear of the current range hood is controlled; the side smoke intake There are multiple mouth smoke concentrations Cb, and the maximum side smoke concentration Cbmax among the multiple side smoke inlet smoke concentrations Cb is calculated. The smoke concentration Cbmax of the hood, the first threshold C1 and the second threshold C2 are used to control the wind speed gear of the current range hood; After detecting and calculating the central smoke inlet smoke concentration Ca and the maximum side smoke inlet smoke concentration Cbmax, a first judgment is performed, and the first judgment includes: Determine whether the smoke concentration Cbmax of the maximum side smoke inlet is greater than the first threshold value C1, and if so, control the wind speed gear of the range hood to be high, and perform the first judgment again after running for a first time period t1; If not, the second judgment is performed, and the wind speed gear of the range hood is controlled according to the result of the second judgment. 2 . The method for controlling the wind speed gear of a range hood according to claim 1 , wherein there are multiple side smoke inlets ( 2 ), and the distance between the plurality of side smoke inlets ( 2 ) is 2. 3 . The distances between the central smoke inlets (1) are equal. 3. The method for controlling the wind speed gear of a range hood according to claim 2, wherein the range hood further comprises a control device, and the control device comprises: a detection unit, the detection unit is used to detect the current central smoke inlet smoke concentration Ca and the side smoke inlet smoke concentration Cb; A control unit, the control unit is used to determine the wind speed gear of the current range hood according to the smoke concentration Ca of the central smoke inlet, the smoke concentration Cb of the side smoke inlets, the first threshold C1 and the second threshold C2 Take control. 4 . The method for controlling the wind speed gear of a range hood according to claim 3 , wherein the detection unit comprises a smoke detection sensor, there are multiple smoke detection sensors, and the plurality of smoke detection sensors are respectively provided. 5 . At the central smoke inlet (1) and the side smoke inlets (2). 5 . The method for controlling the wind speed gear of a range hood according to claim 3 , wherein the control unit is further configured to calculate and obtain the maximum side smoke concentration Cb of a plurality of the side smoke inlets. 6 . Intake smoke concentration Cbmax. 6 . The method for controlling the wind speed gear of a range hood according to claim 1 , wherein the second judgment comprises: judging whether the maximum side smoke inlet smoke concentration Cbmax is greater than the second threshold C2 . 7 . , if yes, control the wind speed gear of the range hood to be in the mid-range, and execute the first judgment again after running for a second time period t2; The fan speed gear of the machine is controlled. 7. The method for controlling the wind speed gear of a range hood according to claim 6, wherein the third judgment comprises: judging whether the smoke concentration Ca of the central smoke inlet is greater than the second threshold C2, and if so , then the wind speed gear of the range hood is controlled to be low, and the first judgment is performed again after running for a third time period t3; Turn off the fan of the range hood. 8 . The method for controlling the wind speed gear of a range hood according to claim 1 , wherein, before the detection of the smoke concentration Cb of the side smoke inlet, the current central smoke inlet smoke concentration Ca is detected, and the first Four judgments, the fourth judgment includes: Determine whether the smoke concentration Ca of the central smoke inlet is greater than the second threshold value C2, if so, detect the smoke concentration Cb of the side smoke inlet, according to the smoke concentration Ca of the central smoke inlet, the side smoke inlet The smoke concentration Cb, the first threshold C1 and the second threshold C2 control the current wind speed gear of the range hood; if not, wait for the fifth time period t5, and then detect the current central smoke inlet smoke concentration again Ca, and re-execute the fourth judgment. 9 . The method for controlling the wind speed gear of a range hood according to claim 1 , wherein the first threshold C1 is greater than the second threshold C2 . 10 .

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