CN211739188U - Intelligent gas cooking bench dry burning prevention device - Google Patents

Intelligent gas cooking bench dry burning prevention device Download PDF

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Publication number
CN211739188U
CN211739188U CN202020303194.3U CN202020303194U CN211739188U CN 211739188 U CN211739188 U CN 211739188U CN 202020303194 U CN202020303194 U CN 202020303194U CN 211739188 U CN211739188 U CN 211739188U
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gas
controller
knob
alarm
signal
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王鼎
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王鼎
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Abstract

The utility model discloses an intelligence gas cooking bench prevents dry combustion method device, the device include radar detecter, controller, knob aperture detector, output circuit, solenoid valve and alarm, radar detecter, knob aperture detector, output circuit, alarm are equallyd divide and do not are connected with the controller, the solenoid valve is connected with output circuit, and the solenoid valve concatenates in the gas circuit for the break-make of control gas, radar detecter is used for surveying the object of activity to send the detection signal for the controller, knob aperture detector is used for detecting the gas openness size of gas-cooker to signal transmission with detecting gives the controller, the alarm is used for reporting to the police and reminds the user to notice. The utility model discloses a radar is surveyed near gas-cooker and whether has personnel to remove in order to confirm whether to be in someone state of watching to carry out relevant control to the gas-cooker through the judgement and handle, with the safety in utilization that improves the gas-cooker.

Description

Intelligent gas cooking bench dry burning prevention device
Technical Field
The utility model relates to an intelligence gas top of a kitchen range prevents dry combustion method device belongs to intelligent control and safety field.
Background
China initially enters an information-based intelligent era, the living standard of people is continuously improved, the gas cooking bench has high occupancy rate and convenient use, and a large number of users are in China. Although the existing gas stove has flameout protection, the gas leakage is avoided, and the risk of explosion or fire is basically eliminated. However, the natural gas cooktops still have the disadvantage that the fire cannot be automatically turned off. This creates a safety hazard caused by unattended or forgetting to shut down the fire. With the aging of Chinese population, empty nests are more and more, and people who suffer from Alzheimer disease are more and more, and the old people may forget to boil on a gas stove which is on fire, so dry burning is caused to be light, a pot tool is damaged, and fire disasters and even casualties are caused seriously.
In recent years, some natural gas dry-burning prevention products appear on the market, but the structure is complex, the judgment accuracy is low, the user experience is poor, the use is complex, the installation is inconvenient, and the self-diagnosis capability is not available.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dry combustion method device is prevented to intelligence gas cooking bench can follow one aspect or the aspect of a plurality of solve above-mentioned problem, guarantees the safe in utilization of gas-cooker.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an intelligence gas cooking bench prevents dry combustion method device, a serial communication port, includes radar detection ware, controller, knob aperture detector, output circuit, solenoid valve and alarm, radar detection ware, knob aperture detector, output circuit, alarm are equallyd divide and are connected with the controller respectively, the solenoid valve is connected with output circuit, and the solenoid valve concatenates in the gas circuit for the break-make of control gas, radar detection ware is used for surveying the object of activity to send the detection signal for the controller, knob aperture detector is used for detecting the gas openness size of gas-cooker to signal transmission who detects gives the controller, the alarm is used for reporting to the police and reminds the user to notice.
Further, the radar detector adopts a microwave human body induction RCWL0516 sensor, the sensor detects active personnel by sending and receiving radio waves, if the personnel activity near the natural gas cooking bench is detected, an effective level is output to the controller, and the effective level signal is a high level or a low level.
Furthermore, the controller adopts any one of a single chip microcomputer, an embedded controller and a programmable logic device, and the controller at least has one path of analog input signals and at least two paths of switching value output signals.
Furthermore, the controller is a TI low-power consumption single-chip microcomputer MSP430I 2020.
Further, the knob opening detector is an angle detection sensor and is used for converting an angle signal of a gas stove knob into an electric analog signal and outputting the electric analog signal to the controller, and the knob opening detector adopts any one of a potentiometer, a Hall angle sensor, a rotary transformer and an angle sensor based on a capacitance principle.
Further, the knob opening detector is connected with the gas stove knob through a coaxial device or a transmission mechanism, and when the gas stove knob rotates, the knob opening detector is driven to rotate together.
Furthermore, the output circuit adopts a relay or a reed switch or an electronic switch with a normally closed contact, and the electromagnetic valve is a normally open switch valve and can open or close the gas circuit under the control signal.
Furthermore, the output loop adopts a macro-transmitting HFD31 relay, the normally closed contacts of the two groups of outputs are connected in parallel for use, one IO port of the controller is amplified by an NPN triode and then connected with a coil of the relay, and the relay is controlled through the IO port.
The utility model has the advantages as follows:
the utility model discloses a whether near radar detection gas-cooker has personnel to remove in order to confirm whether be in someone state of guard, if be in unmanned state of guard, then according to gas-cooker aperture size determination alarm time, if in certain time after the warning, still do not detect personnel and remove then close the gas-cooker to avoid dangerous the emergence. If a long time fire is required, a special gesture can be used to turn the device off.
The utility model discloses a radar detects the benefit be afraid of the filth, be afraid of the oil smoke, other detection methods receive flame and heat source interference easily like infrared detection, and receiver or transmitter are covered by oil smoke or filth easily and do not play the detection effect. The ultrasonic detection method has the advantage that an ultrasonic receiver or an ultrasonic transmitter is easily covered by oil smoke or dirt and cannot detect the oil smoke or the dirt.
The utility model discloses can combine current gas-cooker flame-out protection, can improve the safety in utilization of gas-cooker.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
FIG. 2 is a control circuit connection diagram of the utility model, the triode adopts SOT-23 encapsulation in this circuit, resistance adopts 0805 encapsulation, except that electrolytic capacitor outer capacitor adopts 0805 encapsulation, the connector adopts 2.54 apart from the connector, NPN triode S8050, the PMOS pipe is AO3401, 6.3V 10uF electric capacity adopts 1206 encapsulation, 6.3V 1000uF adopts plug-in components electric capacity, P1 is relay output, P2 is thermocouple input, P4' S1, 3 pins are power input, pin 2 is ignition board power input, P6 is knob aperture detector input, pin 2 is the center terminal of potentiometre
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, an intelligence gas cooking bench prevents dry combustion method device, it includes radar detecter, controller, knob aperture detector, output circuit, solenoid valve and alarm, radar detecter, knob aperture detector, output circuit, alarm are equallyd divide and are connected with the controller respectively, the solenoid valve is connected with output circuit, and the solenoid valve concatenates in the gas circuit for the break-make of control gas.
In this embodiment, the radar detector transmits and receives radio waves to detect whether or not a person is moving. And if the fact that personnel move nearby the natural gas cooking bench is detected, outputting an effective level to the controller. And if the person does not move, not outputting the effective level to the controller. The controller software detects the level, if rapid change is found, the gesture change of the user is judged, and the hand waving action is judged, so that the walking or moving of the user is distinguished. In one implementation of this patent, a change with a period of less than 1s is defined as a rapid change. The special gesture to turn off the device is to wave the hand 3 back and forth in front of the cooktop continuously. After the controller detects that the user has done the gesture, the device will sound an alarm to notify the user that the device is turned off until the next ignition is completed.
Wherein preferred, for reduce cost, reduce the consumption, millimeter wave radar is not selected for use to the radar detedtor, selects for use finished product microwave human response RCWL0516 sensor for reducing the implementation degree of difficulty simultaneously, is that a section adopts Doppler radar technique, detects the microwave response module that the object removed specially. The module has the characteristics of high sensitivity, long sensing distance, strong reliability, large sensing angle, wide power supply range and the like, is directly used, has the over-long sensing distance, needs to be added with a resistor according to the specification, reduces the sensing distance, is arranged outside a metal shell of a gas stove, has the sensing direction which is the direction of the operator, and has the mounting angle obtained according to the practical application experiment.
In this embodiment, the controller may be a single chip, an embedded controller, or a programmable logic device. The controller should have at least one analog input signal and at least two switching output signals. The output port of the controller is connected with an output loop, the output loop is connected with a control coil of an electromagnetic valve, and the electromagnetic valve is connected in series in the fuel gas loop to control the on-off of fuel gas. The output loop drives a relay with a normally closed contact, a reed switch or an electronic switch through a driving circuit, the output of the output loop is connected with a coil loop of an electromagnetic valve, and the electromagnetic valve is a normally open switch valve and can open or close a fuel gas loop under a control signal.
Preferably, the controller is a TI low-power-consumption single-chip microcomputer MSP430I2020 which is packaged by TSSOP28, is 16KB FLASH and is 1KB RAM, and is low in power consumption and capable of meeting the working requirement of battery power supply. The single chip microcomputer is provided with 2 paths of analog quantity input and 8 IO ports, and the requirements of the patent can be met.
Preferably, the flameout preventing device of the gas stove is connected with the other 1 analog quantity input of the controller, the selected gas stove is of a thermocouple type flameout preventing type, and when the gas stove is ignited to work, the thermocouple output voltage is about 20mV and is used as the work indication of the gas stove. If the voltage is more than 10mV and the time lasts for 1 second, the gas stove flame is indicated to be in combustion operation, and is less than 3mV and the time lasts for 3 seconds, the gas stove flame is indicated to be extinguished, and the signal is a flame signal and indicates that the flame is combusted or extinguished.
Preferably, the control output is a normally closed contact signal relay, a macro HFD31 relay, the coil voltage is 3v, the minimum switching load of the contact is 10mV/10uA, and the maximum switching current can reach 2A, so that the requirement can be met. The normally closed contacts of the two groups of outputs are connected in parallel for use to improve the reliability. An IO port of the controller is amplified through an NPN triode S8050 and then is connected with the signal relay coil, the signal relay is controlled through the IO port, the electromagnetic valve is the original gas stove electromagnetic valve, the original control loop is disconnected and then is connected with the normally closed contact of the relay, and therefore software can control the on-off of the gas loop through controlling the IO port.
In this embodiment, the knob opening detector is an angle detection sensor, and converts an angle signal of the gas stove knob into an electrical analog signal to output to the controller. The knob opening detector can be a potentiometer, a Hall angle sensor, a rotary transformer and an angle sensor based on a capacitance principle. The installation of switch opening sensor need reform transform current knob, is on the basis of current knob, increases a coaxial device, and when the knob was rotatory, drive switch opening sensor and rotate together, perhaps drive mechanism realized when the knob is rotatory, drive switch opening sensor and rotate together. The knob is in the ignition position, the output of the knob opening detector is defined as 0, the knob is in the middle maximum position, the output of the knob opening detector is 100%, the knob rotates to the bottom, and the output of the opening detector is 10%.
In the above, the knob opening detector selects a potentiometer, the gas size adjusting knob is modified, and the transmission mechanism is added, so that the potentiometer can be driven to rotate to detect the opening of the gas stove. The middle tap of the potentiometer is connected with the input of the analog quantity AD of the controller, the closed position of the gas stove is defined as the opening degree 0, the knob of the gas stove is rotated to the middle position to be 100 percent, the rotation to the bottom is defined as 10 percent, other opening degrees are calculated according to the flow under different knob angles, the maximum value of the flow is 100 percent, and the percentage under other angles is defined as the maximum value of the flow/the flow.
In this embodiment, the alarm may be an audible alarm or an audible and visual alarm. When the controller outputs a signal, a sound alarm or an acousto-optic alarm can be sent out according to the signal to remind a user of paying attention. Specifically, the alarm of optional finished product piezoceramics can directly send out the alarm sound after the circular telegram, and an IO of controller drives piezoceramics alarm after the triode amplifies. The system sounds an alarm for different on-off times to distinguish between different faults. Wherein:
the continuous 3-second alarm sound is confirmed by closing the dry burning prevention alarm function;
2 seconds of connection and 2 seconds of disconnection are the dry burning time to the alarm sound;
after the gas is dried, the gas valve is cut off for 1 second and 1 second;
and switching on for 1 second and switching off for 5 seconds is used for flameout alarm of the gas stove or fault alarm of a gas stove system.
In conclusion, the flame signal and the gas stove opening detection signal are mutually verified, so that the safety of the system is improved. If the flame signal is detected, the gas stove opening is not 0, the system does not give an alarm, or the flame signal is not detected, the gas stove opening is 0, the system does not give an alarm, the controller gives an alarm to remind personnel of paying attention under other conditions, and the personnel detect whether flameout protection or gas stove failure occurs.
When the gas stove is specifically applied, an existing gas stove is improved, an ignition system of the existing gas stove is reserved, the size of gas is adjusted, a flameout preventing function of the gas is reserved, an original flameout preventing circuit, an original shutoff valve and the like are reserved, a control panel is additionally arranged, a microwave human body induction RCWL0516 sensor and a knob opening detector are arranged, and a battery of an existing igniter is used as a working power supply. The user presses the knob of the gas stove to ignite and simultaneously switches on the power supply of the device, and the device starts to supply power for the user from the power supply circuit.
The control method of the intelligent gas cooking bench dry burning prevention device comprises the following steps: the method is implemented by a program which is arranged in a controller and used for judging whether fire is required to be turned off, and the working principle of the program is as follows: the program in the controller contains three functions, namely a timing setting function, a timing function and a main function. The switch opening degree is detected in the timing setting function, and the control returns to the setting time T0. In one embodiment of the present disclosure, a small fire is defined as an opening of less than 20%, a medium fire is defined as an opening of not less than 20% and less than 60%, and a large fire is defined as an opening of not less than 60%; if the fire is detected to be small, setting the input value of the timing function to be 30 minutes; if the fire is detected as the middle fire, setting the input value of the timing function as 10 minutes; if a fire is detected, the input value to the timing function is set to 5 minutes.
Timers T1, T2, T1 are set for human activity detection, T2 is set for gesture detection, and a gesture counter C is set to have an initial value of 0.
If the radar detector does not detect that a person moves nearby, a T1 timer starts to time, and when the time reaches the set time T0, an alarm starts; after the timing time is more than the set time for 2 minutes, the fire is turned off, and the power supply of the device is turned off after 5 seconds of delay. If the radar detector detects that a person is nearby, the timer T1 is cleared.
If the radar detector detects that a person moves to the change of unmanned activities in the vicinity or the change of unmanned activities to the change of manned activities, the timer T2 starts timing, meanwhile, the gesture counter C is added with 1, if the change occurs within the time of 1s > T2>0.2s, the actions are repeated, otherwise, the gesture counter C is cleared by 0; and meanwhile, a gesture counter is detected, if the gesture counter is larger than 3, an alarm is controlled to give an alarm, a user is informed of closing the device, and the power supply of the device is closed after 5 seconds of delay.
If the device detects that the gas knob is opened to the ignition position, the power supply of the device is turned off after 3 seconds of delay, so that the battery consumption is reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution modes and the like fall within the scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

Claims (8)

1. The utility model provides an intelligence gas cooking bench prevents dry combustion method device, a serial communication port, includes radar detection ware, controller, knob aperture detector, output circuit, solenoid valve and alarm, radar detection ware, knob aperture detector, output circuit, alarm are equallyd divide and are connected with the controller respectively, the solenoid valve is connected with output circuit, and the solenoid valve concatenates in the gas circuit for the break-make of control gas, radar detection ware is used for surveying the object of activity to send the detection signal for the controller, knob aperture detector is used for detecting the gas openness size of gas-cooker to signal transmission who detects gives the controller, the alarm is used for reporting to the police and reminds the user to notice.
2. The intelligent gas cooktop dry burning prevention device of claim 1, wherein the radar detector employs a microwave human body induction RCWL0516 sensor, which detects active personnel by transmitting and receiving radio waves, and if it is detected that there is activity of personnel near the natural gas cooktop, outputs an active level signal to the controller, the active level signal being high level or low level.
3. The intelligent gas cooking bench dry burning prevention device of claim 1, wherein the controller is any one of a single chip microcomputer, an embedded controller and a programmable logic device, and the controller has at least one path of analog input signal and at least two paths of switching value output signals.
4. The dry combustion preventing device for the intelligent gas cooking bench according to claim 1 or 3, wherein the controller is TI low power consumption single chip microcomputer MSP430I 2020.
5. The intelligent gas cooktop dry burning prevention device of claim 1, wherein the knob opening detector is an angle detection sensor for converting an angle signal of a gas cooker knob into an electrical analog signal and outputting the electrical analog signal to the controller, and the knob opening detector is any one of a potentiometer, a hall angle sensor, a rotary transformer, and an angle sensor based on a capacitance principle.
6. The intelligent gas cooktop dry burning prevention device of claim 1, wherein the knob opening detector is connected to the gas cooker knob through a coaxial device or a transmission mechanism, and when the gas cooker knob is rotated, the knob opening detector is driven to rotate together.
7. The intelligent gas cooking bench dry burning prevention device of claim 1, wherein the output circuit adopts a relay or a reed switch or an electronic switch with a normally closed contact, and the electromagnetic valve is a normally open switch valve capable of opening or closing the gas circuit under a control signal.
8. The intelligent gas cooking bench dry burning prevention device of claim 1 or 7, wherein the output loop is a macro HFD31 relay, two sets of normally closed contacts of the output loop are connected in parallel for use, and one IO port of the controller is amplified by an NPN triode and then connected with a coil of the relay, and the relay is controlled through the IO port.
CN202020303194.3U 2020-03-12 2020-03-12 Intelligent gas cooking bench dry burning prevention device Active CN211739188U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111197770A (en) * 2020-03-12 2020-05-26 王鼎 Intelligent gas cooking bench dry-burning prevention device and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111197770A (en) * 2020-03-12 2020-05-26 王鼎 Intelligent gas cooking bench dry-burning prevention device and control method thereof

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