CN113864842A - Smoke exhaust ventilator - Google Patents
Smoke exhaust ventilator Download PDFInfo
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- CN113864842A CN113864842A CN202111257581.3A CN202111257581A CN113864842A CN 113864842 A CN113864842 A CN 113864842A CN 202111257581 A CN202111257581 A CN 202111257581A CN 113864842 A CN113864842 A CN 113864842A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention provides a range hood, which comprises a lampblack detection module, a control module, a motor driving module and a motor, wherein the lampblack detection module is connected with the control module; the oil smoke detection module is connected with a first input end of the control module and used for detecting the oil smoke concentration and outputting a first detection signal according to the oil smoke concentration to be sent to the first input end of the control module; the control module is used for comparing the first detection signal with a first set threshold value and sending a starting instruction or a closing instruction to the motor driving module according to a comparison result; the motor driving module is used for controlling the motor to be started when receiving a starting instruction and is also used for controlling the motor to be closed when receiving a closing instruction; the oil smoke detection module comprises a transformer, a first resistor and a detection unit, and the detection unit is used for adjusting the size of the first detection signal according to the oil smoke concentration and the operation of a user. The range hood provided by the embodiment of the invention can automatically turn on or off the motor in the range hood according to the concentration of oil smoke in a kitchen.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a range hood.
Background
Along with the rapid development of social economy, the quality requirements of people on social life are higher and higher, the requirements on kitchen environment are higher and higher, and the smoke extractor is favored by users more and plays an important role at the same time.
The range hood is an essential household appliance for users living in a cell. Many users forget to open the smoke exhaust ventilator in the middle of the cooking process because of busy cooking all the time, lead to a lot of oil fumes in the kitchen, just think of and open smoke exhaust ventilator, will lead to a lot of oil fumes of accumulation in the kitchen like this. Some users forget to turn off the range hood in the kitchen after cooking, so that the motor in the range hood always runs, and a large amount of electric energy is wasted. The existing range hood needs to be manually opened or closed, cannot implement automatic control, and is not intelligent enough and convenient enough.
Disclosure of Invention
The range hood provided by the embodiment of the invention can automatically turn on or off the motor in the range hood according to the concentration of oil smoke in a kitchen.
The embodiment of the invention provides a range hood, which comprises a lampblack detection module, a control module, a motor driving module and a motor, wherein the lampblack detection module is connected with the control module;
the oil smoke detection module is connected with a first input end of the control module and used for detecting the concentration of oil smoke and outputting a first detection signal according to the concentration of the oil smoke to be sent to the first input end of the control module;
the first output end of the control module is connected with the motor driving module, and the control module is used for comparing the first detection signal with a first set threshold value and sending a starting instruction or a closing instruction to the motor driving module according to a comparison result;
the motor driving module is used for controlling the motor to be started when receiving the starting instruction and is also used for controlling the motor to be stopped when receiving the closing instruction;
the oil smoke detection module comprises a transformer, a first resistor and a detection unit, wherein the primary side of the transformer is connected with a mains supply, the first end of the secondary side of the transformer is connected with the first end of the first resistor, the second end of the secondary side of the transformer is grounded, the third end of the transformer is connected with the first end of the detection unit, the second end of the detection unit is connected with the second end of the first resistor, the third end of the detection unit is connected with the first input end of the control module, and the fourth end of the detection unit is grounded;
the detection unit is used for adjusting the size of the first detection signal according to the oil smoke concentration and the operation of a user.
Optionally, the oil smoke detection module further includes a power supply unit, and the power supply unit is configured to input a stable power signal to the control module;
the first end of the power supply unit is connected with the third end of the secondary side of the transformer, the second end of the power supply unit is connected with the third end of the detection unit, the third end of the power supply unit is connected with the power input end of the control module, and the fourth end of the power supply unit is grounded.
Optionally, the detection unit includes a gas sensor, a second resistor, a temperature compensator, a precision potentiometer, a second resistor, a third resistor, a fourth resistor, a first diode, and a first capacitor;
the first end of the gas sensor is connected with the third end of the transformer, the second end of the gas sensor is connected with the second end of the first resistor, the third end of the gas sensor is connected with the first end of the second resistor, and the fourth end of the gas sensor is connected with the first end of the temperature compensator;
the second end of the second resistor is connected with the first end of the precision potentiometer;
the second end of the precision potentiometer is connected with the positive end of the first diode, and the third end of the precision potentiometer is connected with the first end of the fourth resistor;
the negative end of the first diode is connected with the first end of the first capacitor, the second end of the power supply unit and the first input end of the control module;
the second end of the temperature compensator is connected with the first end of the third resistor;
the second end of the third resistor is grounded;
a second end of the fourth resistor is grounded;
the second end of the first capacitor is grounded;
the temperature compensator is used for enabling the detection units to detect the same oil smoke concentration at different environmental temperatures with the same accuracy;
the precision potentiometer is used for controlling the size of the first detection signal.
Optionally, the power supply unit includes a second diode, a second capacitor, a fifth resistor, a third diode, a voltage regulator tube, and a third capacitor;
an anode end of the second diode is connected with a third end of the secondary side of the transformer, and a cathode end of the second diode is connected with a first end of the second capacitor and a first end of the fifth resistor;
the second end of the fifth resistor is connected with the cathode end of the third diode, the cathode end of the voltage regulator tube, the first end of the third capacitor and the power supply input end of the control module;
the anode end of the third diode is connected with the third end of the detection unit;
the second end of the second capacitor is grounded;
the anode end of the voltage stabilizing tube is grounded;
and the second end of the third capacitor is grounded.
Optionally, the motor driving module includes a sixth resistor, a triode, and a relay;
the first end of the sixth resistor is connected with the first output end of the control module, and the second end of the sixth resistor is connected with the grid electrode of the triode;
the first pole of the triode is grounded, and the second pole of the triode is connected with the first end of the relay;
the second end of the relay is connected with the first end of the mains supply, the third end of the relay is connected with the first end of the motor, and the fourth end of the relay is grounded;
and the second end of the motor is connected with the second end of the commercial power.
Optionally, the range hood provided by the embodiment of the invention further comprises a liquid level detection module and a liquid level alarm module;
the liquid level detection module is connected with a second input end of the control module and is used for detecting the liquid level of waste oil in the range hood, converting the liquid level of the waste oil into a second detection signal and sending the second detection signal to the control module;
the second output end of the control module is connected with the liquid level alarm module, and the control module is used for judging whether the waste oil liquid level exceeds a second set threshold value according to the second detection signal and sending a high level signal to the liquid level alarm module when the waste oil liquid level exceeds the second set threshold value;
and the liquid level alarm module sends out an alarm prompt when receiving the high level signal.
Optionally, the liquid level alarm module includes a first nand gate, a second nand gate, a third nand gate, a fourth nand gate, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a fourth capacitor, a fifth capacitor, and a buzzer;
a first input end of the first nand gate is connected with a second output end of the control module and a first end of the seventh resistor, a second input end of the first nand gate is connected with a first end of the eighth resistor, and an output end of the first nand gate is connected with a first end of the ninth resistor, a first input end of the second nand gate and a second input end of the second nand gate;
the second end of the seventh resistor is connected with the output end of the second nand gate, the first end of the fourth capacitor and the first input end of the third nand gate;
a second end of the eighth resistor is connected with a second end of the ninth resistor and a second end of the fourth capacitor;
a second input end of the third nand gate is connected with a first end of the tenth resistor, and an output end of the third nand gate is connected with a first end of the eleventh resistor, a first end of the buzzer, a first input end of the fourth nand gate and a second input end of the fourth nand gate;
a second end of the tenth resistor is connected with a second end of the eleventh resistor and a first end of the fifth capacitor;
and the output end of the fourth NAND gate is connected with the second end of the fifth capacitor and the second end of the buzzer.
Optionally, the range hood provided by the embodiment of the invention further comprises a voice control module;
the voice control module is connected with a third input end of the control module;
the voice control module is used for receiving voice information output by a user, outputting a motor starting instruction or a motor closing instruction according to the voice information and sending the motor starting instruction or the motor closing instruction to the control module;
the control module is further used for sending a starting instruction to the motor driving module according to the motor starting instruction or sending a closing instruction to the motor driving module according to the motor closing instruction.
Optionally, the range hood provided by the embodiment of the invention further comprises a display module;
the third output end of the control module is connected with the display module, and the control module is used for outputting the oil smoke concentration value to the display module according to the first detection signal and is also used for outputting the waste oil level value to the display module according to the second detection signal;
the display module is used for displaying the oil smoke concentration value and the waste oil liquid level value.
Optionally, the range hood provided by the embodiment of the invention further comprises an illumination module;
the lighting module includes an LED.
The embodiment of the invention provides a range hood, which is provided with an oil smoke detection module for detecting the concentration of oil smoke in a kitchen and outputting a first detection signal to a control module according to the concentration of the oil smoke, wherein the control module can send a starting instruction to a motor driving module when the first detection signal is greater than a first set threshold value so as to control the starting of a motor and reduce the concentration of the oil smoke in the kitchen, and can also send a closing instruction to the motor driving module so as to control the closing of the motor when the first detection signal is less than the first set threshold value, and close the motor when the concentration of the oil smoke in the kitchen is lower so as to save electric energy. The range hood provided by the embodiment of the invention can automatically turn on or off the motor in the range hood according to the concentration of oil smoke in a kitchen.
Drawings
Fig. 1 is a schematic structural diagram of a range hood provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of another range hood provided by the embodiment of the invention;
fig. 3 is a schematic structural diagram of another range hood provided by the embodiment of the invention;
fig. 4 is a schematic structural diagram of another range hood provided by the embodiment of the invention;
fig. 5 is a schematic structural diagram of another range hood provided by the embodiment of the invention;
fig. 6 is a schematic structural diagram of another range hood provided by the embodiment of the invention;
fig. 7 is a schematic structural diagram of another range hood provided by the embodiment of the invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention, and referring to fig. 1, the range hood according to the embodiment of the present invention includes a smoke detection module 110, a control module 120, a motor drive module 130, and a motor 140; the oil smoke detection module 110 is connected with a first input end of the control module 120, and the oil smoke detection module 110 is used for detecting oil smoke concentration and outputting a first detection signal according to the oil smoke concentration to be sent to the first input end of the control module 120; a first output end of the control module 120 is connected to the motor driving module 130, and the control module 120 is configured to compare the first detection signal with a first set threshold, and send a start instruction or a close instruction to the motor driving module 130 according to a comparison result; the motor driving module 130 is configured to control the motor 140 to start when receiving a start instruction, and is further configured to control the motor 140 to shut down when receiving a shut-down instruction; the lampblack detection module 110 comprises a transformer 111, a first resistor R1 and a detection unit 112, wherein the primary side of the transformer 111 is connected with a mains supply, the first end of the secondary side of the transformer 111 is connected with the first end of the first resistor R1, the second end of the secondary side of the transformer 111 is grounded, the third end of the transformer 111 is connected with the first end of the detection unit 112, the second end of the detection unit 112 is connected with the second end of the first resistor R1, the third end of the detection unit 112 is connected with the first input end of the control module 120, and the fourth end of the detection unit 112 is grounded; the detection unit 112 is configured to adjust the magnitude of the first detection signal according to the soot concentration and the operation of the user.
Specifically, the transformer 111 is used to convert the commercial power into a voltage required by the normal operation of the smoke detection module 110. The resistance of the first resistor R1 may be 5.6 Ω. The first detection signal is related to the oil smoke concentration in the kitchen and the operation of the user, and under the operation of the user, the first detection signal output by the oil smoke detection module 110 under different oil smoke concentrations can be the same in size, and the user can determine under which oil smoke concentration the motor is started according to actual needs. If the first detection signal increases with the increase of the oil smoke concentration, the control module 120 may send a start instruction to the motor driving module 130 when the first detection signal is greater than a first set threshold, or send a close instruction to the motor driving module 130 when the first detection signal is less than the first set threshold, for example, when the oil smoke concentration in the kitchen gradually increases, the first detection signal sent to the control module 120 by the oil smoke detection module 110 will gradually increase, when the control module 120 detects that the first detection signal is greater than the first set threshold, the control module 120 sends a start instruction to the motor driving module 130, the motor driving module 130 controls the motor 140 to start, after the motor 140 starts, the blades in the range hood will rotate, the rotation will generate a suction force to suck out the oil smoke in the kitchen, thereby gradually decreasing the oil smoke concentration in the kitchen, and in the process of gradually decreasing the oil smoke concentration in the kitchen, first detection signal that oil smoke detection module 110 sent to control module 120 will reduce gradually, when control module 120 detects out that first detection signal is less than first settlement threshold, control module 120 sends the instruction of closing to motor drive module 130, motor drive module 130 control motor 140 closes, thereby when avoiding in the kitchen no oil smoke or when dense smoke concentration is less motor 140 still is in operating condition, compare in the smoke ventilator of present needs manual control, the smoke ventilator that this embodiment provided is more intelligent, can in time reduce the oil smoke concentration in the kitchen, also can avoid the user to forget to close the waste that the smoke ventilator caused the electric energy.
The embodiment of the invention provides a range hood, which is provided with an oil smoke detection module for detecting the concentration of oil smoke in a kitchen and outputting a first detection signal to a control module according to the concentration of the oil smoke, wherein the control module can send a starting instruction to a motor driving module when the first detection signal is greater than a first set threshold value so as to control the starting of a motor and reduce the concentration of the oil smoke in the kitchen, and can also send a closing instruction to the motor driving module so as to control the closing of the motor when the first detection signal is less than the first set threshold value, and close the motor when the concentration of the oil smoke in the kitchen is lower so as to save electric energy. The range hood provided by the embodiment of the invention can automatically turn on or off the motor in the range hood according to the concentration of oil smoke in a kitchen.
Optionally, fig. 2 is a schematic structural diagram of another range hood according to an embodiment of the present invention, referring to fig. 2, the oil smoke detection module 110 further includes a power supply unit 113, and the power supply unit 113 is configured to input a stable power signal to the control module 120; the first end of the power supply unit 113 is connected to the third end of the secondary side of the transformer 111, the second end of the power supply unit 113 is connected to the third end of the detection unit 112, the third end of the power supply unit 113 is connected to the power input end of the control module 120, and the fourth end of the power supply unit 113 is grounded.
Specifically, the lampblack detection module 110 can be reused as a power supply of the control module 120, a stable power supply signal is provided for the control module 120, and the control module 120 is not required to be connected to a new power supply module, so that the manufacturing cost of the range hood is reduced.
Optionally, fig. 3 is a schematic structural diagram of another range hood according to an embodiment of the present invention, and referring to fig. 3, the detection unit includes a gas sensor QM, a second resistor R2, a temperature compensator RP, a precision potentiometer RM, a third resistor R3, a fourth resistor R4, a first diode V1, and a first capacitor C1; the first end of the gas sensor QM is connected with the third end of the transformer 111, the second end of the gas sensor QM is connected with the second end of the first resistor R1, the third end of the gas sensor QM is connected with the first end of the second resistor R2, and the fourth end of the gas sensor QM is connected with the first end of the temperature compensator RP; the second end of the second resistor R2 is connected with the first end of the precision potentiometer RM; the second end of the precision potentiometer RM is connected with the positive end of a first diode V1, and the third end of the precision potentiometer RM is connected with the first end of a fourth resistor R4; a negative electrode terminal of the first diode V1 is connected with a first terminal of the first capacitor C1, a second terminal of the power supply unit and a first input terminal of the control module 120; the second end of the temperature compensator RP is connected with the first end of the third resistor R3; the second end of the third resistor R3 is grounded; a second end of the fourth resistor R4 is grounded; the second end of the first capacitor C1 is grounded; the temperature compensator RP is used for enabling the detection units to detect the same oil smoke concentration at different environmental temperatures with the same accuracy; the precision potentiometer RM is used to control the magnitude of the first detection signal.
Specifically, the voltage input to the gas sensor QM from the third terminal of the transformer 111 may be 3V. The first capacitance C1 may be 1 μ F in size. The gas sensor QM is used for detecting the concentration of the oil smoke, and when the concentration of the oil smoke in the kitchen rises, the voltage across the gas sensor QM increases, so that the first detection signal increases. The size of the temperature compensator RP, which may be a variable resistor, varies with temperature. Since the gas sensor QM is susceptible to temperature, when the concentration of the soot in the kitchen is the same, the voltages at the two ends of the same gas sensor QM are different at different temperatures, and therefore, the temperature compensator RP is configured to compensate the fluctuation value of the gas sensor QM caused by the temperature, thereby improving the detection accuracy of the soot detection module 110. The size of the precision potentiometer RM can also be changed, and under the same oil smoke concentration and different sizes of the precision potentiometer RM, the size of the first detection signal will be different, and a user can control the motor 140 to be started under which oil smoke concentration by adjusting the size of the precision potentiometer RM.
Optionally, with continued reference to fig. 3, the power supply unit includes a second diode V2, a second capacitor C2, a fifth resistor R5, a third diode V3, a voltage regulator VZ, and a third capacitor C3; an anode terminal of the second diode V2 is connected to the third terminal of the secondary side of the transformer 111, and a cathode terminal of the second diode V2 is connected to the first terminal of the second capacitor C2 and the first terminal of the fifth resistor R5; a second end of the fifth resistor R5 is connected to a cathode terminal of the third diode V3, a cathode terminal of the regulator VZ, a first end of the third capacitor C3, and a power input terminal of the control module 120; the anode end of the third diode V3 is connected with the third end of the detection unit; the second end of the second capacitor C2 is grounded; the anode end of the voltage stabilizing tube VZ is grounded; the second terminal of the third capacitor C3 is connected to ground.
Specifically, the voltage level inputted from the third terminal of the transformer 111 to the anode terminal of the second diode V2 may be 5V, and the second diode V2, the second capacitor C2 and the fifth resistor R5 are used for rectification and filtering. The resistance of the fifth resistor R5 may be 220 Ω, the size of the second capacitor C2 may be 100 μ F, the size of the third capacitor C3 may be 47 μ F, and the voltage regulator VZ is used for voltage regulation to ensure that the voltage input at the power input terminal of the control module 120 is constant, and for example, the power supply unit may provide 5.6V power for the control module 120.
Optionally, fig. 4 is a schematic structural diagram of another range hood according to an embodiment of the present invention, and referring to fig. 4, the motor driving module 130 includes a sixth resistor R6, a triode T, and a relay 131; a first end of the sixth resistor R6 is connected to the first output end of the control module 120, and a second end of the sixth resistor R6 is connected to the gate of the transistor T; a first pole of the triode T is grounded, and a second pole of the triode T is connected with a first end of the relay 131; the second end of the relay 131 is connected with the first end of the commercial power, the third end of the relay 131 is connected with the first end of the motor 140, and the fourth end of the relay 131 is grounded; a second terminal of the motor 140 is connected to a second terminal of the mains.
Specifically, when the control module 120 detects that the first detection signal is greater than the first set threshold value, the first output end of the control module 120 outputs a high level signal to the motor driving module 130, the triode T is turned on when the motor driving module 130 receives the high level signal, and the coil in the relay 131 is normally opened to attract the relay 131, so that the motor 140 is powered on, the motor 140 is powered on and then drives the blades to rotate, the blades rotate to generate suction, and oil smoke in a kitchen is sucked out. When the control module 120 detects that the first detection signal is smaller than the first set threshold, the first output end of the control module 120 outputs a low level signal to the motor driving module 130, the transistor T is turned off when the motor driving module 130 receives the low level signal, and the motor 140 is powered off and turned off. The transistor T in the motor driving module 130 has a function of protecting the control module 120, and the transistor T can prevent a strong current of 220V from being connected in series to the control module 120 to burn out the control module 120.
Optionally, fig. 5 is a schematic structural diagram of another range hood provided in the embodiment of the present invention, and referring to fig. 5, the range hood provided in the embodiment of the present invention further includes a liquid level detection module 150 and a liquid level alarm module 160; the liquid level detection module 150 is connected with a second input end of the control module 120, and the liquid level detection module 150 is used for detecting the waste oil level in the range hood, converting the waste oil level into a second detection signal and sending the second detection signal to the control module 120; a second output end of the control module 120 is connected to the liquid level alarm module 160, and the control module 120 is configured to determine whether the waste oil liquid level exceeds a second set threshold according to the second detection signal, and send a high level signal to the liquid level alarm module 160 when the waste oil liquid level exceeds the second set threshold; the liquid level alarm module 160 sends an alarm prompt when receiving the high level signal.
Specifically, the waste oil of smoke ventilator the inside is irritated and is used for collecting the oil smoke, if waste oil is full in the waste oil is irritated, the user forgets timely clearance, and waste oil has probably oozed out when cooking, leads to not good user experience. When the second detection signal exceeds the second set threshold value, it is described that the waste oil liquid level in the waste oil tank reaches the maximum value stored in the waste oil tank, the control module 120 sends a high level signal to the liquid level alarm module 160, and the liquid level alarm module 160 sends an alarm prompt when receiving the high level signal, wherein the alarm prompt can be a light flashing prompt or a sound prompt, so as to prompt a user to timely treat the waste oil in the waste oil tank.
Optionally, fig. 6 is a schematic structural diagram of another range hood provided in an embodiment of the present invention, referring to fig. 6, the liquid level alarm module 160 includes a first nand gate U1, a second nand gate U2, a third nand gate U3, a fourth nand gate U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a fourth capacitor C4, a fifth capacitor C5, and a buzzer 161; a first input end of the first nand gate U1 is connected with a second output end of the control module 120 and a first end of the seventh resistor R7, a second input end of the first nand gate U1 is connected with a first end of the eighth resistor R8, and an output end of the first nand gate U1 is connected with a first end of the ninth resistor R9, a first input end of the second nand gate U2 and a second input end of the second nand gate U2; a second end of the seventh resistor R7 is connected to the output end of the second nand gate U2, the first end of the fourth capacitor C4 and the first input end of the third nand gate U3; a second end of the eighth resistor R8 is connected to a second end of the ninth resistor R9 and a second end of the fourth capacitor C4; a second input end of the third nand gate U3 is connected with a first end of the tenth resistor R10, and an output end of the third nand gate U3 is connected with a first end of the eleventh resistor R11, a first end of the buzzer 161, a first input end of the fourth nand gate U4 and a second input end of the fourth nand gate U4; a second terminal of the tenth resistor R10 is connected to a second terminal of the eleventh resistor R11 and a first terminal of the fifth capacitor C5; the output end of the fourth nand gate U4 is connected to the second end of the fifth capacitor C5 and the second end of the buzzer 161.
Specifically, when the first input end of the first nand gate U1 receives a high level signal, the output end of the second nand gate U2 outputs a square wave signal, and when the first input end of the third nand gate U3 receives the high level signal output by the output end of the second nand gate U2, the buzzer 161 will sound, so as to remind a user to process waste oil in the waste oil tank in time. When the first input terminal of the first nand gate U1 receives a low level signal, the buzzer 161 does not operate.
Optionally, fig. 7 is a schematic structural diagram of another range hood provided in the embodiment of the present invention, and referring to fig. 7, the range hood provided in the embodiment of the present invention further includes a voice control module 170; the voice control module 170 is connected with a third input end of the control module 120; the voice control module 170 is configured to receive voice information output by a user, output a motor starting instruction or a motor closing instruction according to the voice information, and send the motor starting instruction or the motor closing instruction to the control module 120; the control module 120 is further configured to send a start instruction to the motor driving module 130 according to the motor start instruction or send a stop instruction to the motor driving module 130 according to the motor stop instruction.
For example, when a user needs the range hood to remove oil smoke in a kitchen, the user may speak "start the range hood" to the range hood, and then the voice control module 170 compares the received voice information with the stored voice command password, and if the voice command password is correct, sends a motor starting instruction to the control module 120, and the control module 120 sends a starting instruction to the motor driving module 130 after receiving the motor starting instruction, thereby controlling the motor 140 to start. The voice control module 170 is provided to control the motor 140 to be turned on or off when the smoke detection module 110 fails, without manual operation of a user.
Optionally, with continued reference to fig. 7, the range hood provided in the embodiment of the present invention further includes a display module 180; a third output end of the control module 120 is connected with the display module 180, and the control module 120 is configured to output the oil smoke concentration value to the display module 180 according to the first detection signal and is further configured to output the waste oil level value to the display module 180 according to the second detection signal; the display module 180 is used for displaying the oil smoke concentration value and the waste oil level value.
Specifically, the control module 120 may output a current oil fume concentration value in the kitchen according to the first detection signal, and may also output a current waste oil level value in the waste oil tank according to the second detection signal, and the user may check the current waste oil level value in the waste oil tank and the current oil fume concentration value in the kitchen in real time through the display module 180. The display module 180 may include a liquid crystal display or an LED display.
Optionally, the range hood provided by the embodiment of the invention further comprises an illumination module; the lighting module includes an LED.
Particularly, the lighting module is used for lighting, so that a user can conveniently provide enough brightness when cooking and cooking at night. The LED has the characteristics of long service life, power saving, low cost and the like, and the lighting module comprises the LED and can reduce the cost of the range hood.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments may be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A range hood is characterized by comprising an oil smoke detection module, a control module, a motor driving module and a motor;
the oil smoke detection module is connected with a first input end of the control module and used for detecting the concentration of oil smoke and outputting a first detection signal according to the concentration of the oil smoke to be sent to the first input end of the control module;
the first output end of the control module is connected with the motor driving module, and the control module is used for comparing the first detection signal with a first set threshold value and sending a starting instruction or a closing instruction to the motor driving module according to a comparison result;
the motor driving module is used for controlling the motor to be started when receiving the starting instruction and is also used for controlling the motor to be stopped when receiving the closing instruction;
the oil smoke detection module comprises a transformer, a first resistor and a detection unit, wherein the primary side of the transformer is connected with a mains supply, the first end of the secondary side of the transformer is connected with the first end of the first resistor, the second end of the secondary side of the transformer is grounded, the third end of the transformer is connected with the first end of the detection unit, the second end of the detection unit is connected with the second end of the first resistor, the third end of the detection unit is connected with the first input end of the control module, and the fourth end of the detection unit is grounded;
the detection unit is used for adjusting the size of the first detection signal according to the oil smoke concentration and the operation of a user.
2. The range hood of claim 1, wherein the smoke detection module further comprises a power supply unit, and the power supply unit is used for inputting a stable power supply signal to the control module;
the first end of the power supply unit is connected with the third end of the secondary side of the transformer, the second end of the power supply unit is connected with the third end of the detection unit, the third end of the power supply unit is connected with the power input end of the control module, and the fourth end of the power supply unit is grounded.
3. The range hood of claim 2, wherein the detection unit comprises a gas sensor, a second resistor, a temperature compensator, a precision potentiometer, a second resistor, a third resistor, a fourth resistor, a first diode and a first capacitor;
the first end of the gas sensor is connected with the third end of the transformer, the second end of the gas sensor is connected with the second end of the first resistor, the third end of the gas sensor is connected with the first end of the second resistor, and the fourth end of the gas sensor is connected with the first end of the temperature compensator;
the second end of the second resistor is connected with the first end of the precision potentiometer;
the second end of the precision potentiometer is connected with the positive end of the first diode, and the third end of the precision potentiometer is connected with the first end of the fourth resistor;
the negative end of the first diode is connected with the first end of the first capacitor, the second end of the power supply unit and the first input end of the control module;
the second end of the temperature compensator is connected with the first end of the third resistor;
the second end of the third resistor is grounded;
a second end of the fourth resistor is grounded;
the second end of the first capacitor is grounded;
the temperature compensator is used for enabling the detection units to detect the same oil smoke concentration at different environmental temperatures with the same accuracy;
the precision potentiometer is used for controlling the size of the first detection signal.
4. The range hood of claim 2, wherein the power supply unit comprises a second diode, a second capacitor, a fifth resistor, a third diode, a voltage regulator tube and a third capacitor;
an anode end of the second diode is connected with a third end of the secondary side of the transformer, and a cathode end of the second diode is connected with a first end of the second capacitor and a first end of the fifth resistor;
the second end of the fifth resistor is connected with the cathode end of the third diode, the cathode end of the voltage regulator tube, the first end of the third capacitor and the power supply input end of the control module;
the anode end of the third diode is connected with the third end of the detection unit;
the second end of the second capacitor is grounded;
the anode end of the voltage stabilizing tube is grounded;
and the second end of the third capacitor is grounded.
5. The range hood of claim 1, wherein the motor drive module comprises a sixth resistor, a triode, and a relay;
the first end of the sixth resistor is connected with the first output end of the control module, and the second end of the sixth resistor is connected with the grid electrode of the triode;
the first pole of the triode is grounded, and the second pole of the triode is connected with the first end of the relay;
the second end of the relay is connected with the first end of the mains supply, the third end of the relay is connected with the first end of the motor, and the fourth end of the relay is grounded;
and the second end of the motor is connected with the second end of the commercial power.
6. The range hood of claim 1, further comprising a liquid level detection module and a liquid level alarm module;
the liquid level detection module is connected with a second input end of the control module and is used for detecting the liquid level of waste oil in the range hood, converting the liquid level of the waste oil into a second detection signal and sending the second detection signal to the control module;
the second output end of the control module is connected with the liquid level alarm module, and the control module is used for judging whether the waste oil liquid level exceeds a second set threshold value according to the second detection signal and sending a high level signal to the liquid level alarm module when the waste oil liquid level exceeds the second set threshold value;
and the liquid level alarm module sends out an alarm prompt when receiving the high level signal.
7. The range hood of claim 6, wherein the liquid level alarm module comprises a first NAND gate, a second NAND gate, a third NAND gate, a fourth NAND gate, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a fourth capacitor, a fifth capacitor and a buzzer;
a first input end of the first nand gate is connected with a second output end of the control module and a first end of the seventh resistor, a second input end of the first nand gate is connected with a first end of the eighth resistor, and an output end of the first nand gate is connected with a first end of the ninth resistor, a first input end of the second nand gate and a second input end of the second nand gate;
the second end of the seventh resistor is connected with the output end of the second nand gate, the first end of the fourth capacitor and the first input end of the third nand gate;
a second end of the eighth resistor is connected with a second end of the ninth resistor and a second end of the fourth capacitor;
a second input end of the third nand gate is connected with a first end of the tenth resistor, and an output end of the third nand gate is connected with a first end of the eleventh resistor, a first end of the buzzer, a first input end of the fourth nand gate and a second input end of the fourth nand gate;
a second end of the tenth resistor is connected with a second end of the eleventh resistor and a first end of the fifth capacitor;
and the output end of the fourth NAND gate is connected with the second end of the fifth capacitor and the second end of the buzzer.
8. The range hood of claim 1, further comprising a voice control module;
the voice control module is connected with a third input end of the control module;
the voice control module is used for receiving voice information output by a user, outputting a motor starting instruction or a motor closing instruction according to the voice information and sending the motor starting instruction or the motor closing instruction to the control module;
the control module is further used for sending a starting instruction to the motor driving module according to the motor starting instruction or sending a closing instruction to the motor driving module according to the motor closing instruction.
9. The range hood of claim 6, further comprising a display module;
the third output end of the control module is connected with the display module, and the control module is used for outputting the oil smoke concentration value to the display module according to the first detection signal and is also used for outputting the waste oil level value to the display module according to the second detection signal;
the display module is used for displaying the oil smoke concentration value and the waste oil liquid level value.
10. The range hood of claim 1, further comprising a lighting module;
the lighting module includes an LED.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111257581.3A CN113864842B (en) | 2021-10-27 | 2021-10-27 | Fume exhaust fan |
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| CN202111257581.3A CN113864842B (en) | 2021-10-27 | 2021-10-27 | Fume exhaust fan |
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| CN113864842B CN113864842B (en) | 2023-05-12 |
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| EP1384952A2 (en) * | 2002-07-26 | 2004-01-28 | Samsung Electronics Co., Ltd. | Smoke guiding apparatus of wall-mounted microwave oven |
| WO2006045250A1 (en) * | 2004-10-28 | 2006-05-04 | Xiuquan Wang | An air conditioning cooker hood with an air collecting shield system |
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| CN113864842B (en) | 2023-05-12 |
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