CN210532465U - Intelligent automatic gas ignition and extinguishing protection system for cooking machine - Google Patents
Intelligent automatic gas ignition and extinguishing protection system for cooking machine Download PDFInfo
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- CN210532465U CN210532465U CN201921567695.6U CN201921567695U CN210532465U CN 210532465 U CN210532465 U CN 210532465U CN 201921567695 U CN201921567695 U CN 201921567695U CN 210532465 U CN210532465 U CN 210532465U
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Abstract
The utility model discloses an automatic gas ignition and extinguishing protection system of an intelligent cooker, a gas pipeline is communicated with a cooker to provide gas, and an ignition valve for controlling the size of a passage of the gas pipeline is arranged on the gas pipeline to adjust the amount of supplied gas; an ignition needle for ignition is arranged on the stove, an electric control system realizes ignition through the ignition needle and an ignition valve, the ignition valve supplies air to the stove, and opens the ignition needle to ignite the fuel gas discharged from the stove; set up the thermistor that is used for monitoring the stove fire temperature on the stove, the stove fire temperature difference can make thermistor produce different electromotive force signals, and electrical system receives thermistor's electromotive force signal to judge whether flame-out, control the ignition valve and close when flame-out, stop supplying gas to the stove, avoid the gas to leak when flame-out, guarantee safe in utilization.
Description
Technical Field
The utility model relates to a kitchen utensil technical field further relates to an intelligence machine gas autoignition of cooking puts out system of protecting.
Background
Most people select the gas stove when cooking and frying, the gas stove needs to be controlled to manually adjust the gas supply amount, the firepower adjustment needs to be manually operated and monitored at any time in the frying process, otherwise, the pot is easily burnt or the firepower is insufficient, and the appearance and the taste of the finished dishes are influenced; the flame is extinguished due to the possible sudden state in the cooking process, the flame is blocked by the frying pan and cannot be found in time, the fuel gas is continuously supplied and discharged when the flame is extinguished accidentally, the fuel gas supply cannot be cut off when the fuel gas is extinguished accidentally, and danger is easily caused.
For those skilled in the art, how to automatically turn off the gas supply when the flame is extinguished is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides an intelligence machine of cooking gas automatic ignition puts out system of protecting, control the ignition valve and close when putting out fire, stop to the stove gas supply, concrete scheme is as follows:
an intelligent automatic fuel gas ignition and extinguishing protection system of a cooker comprises a fuel gas pipeline, wherein the fuel gas pipeline is communicated with a gas source and a cooker to provide fuel gas;
an ignition valve for controlling the size of the gas path and an electromagnetic valve for controlling the on-off of the gas path are arranged on the gas path;
an ignition needle for ignition and a thermistor for monitoring the temperature of the furnace fire are arranged on the furnace;
the electric control system controls the ignition needle, the ignition valve and the electromagnetic valve to realize ignition; and the electric control system receives the electromotive force signal of the thermistor, judges whether to extinguish, and controls the ignition valve and the electromagnetic valve to be closed when extinguishing.
Optionally, the device further comprises a proximity switch and a metal trigger rod, wherein the trigger rod can be close to or far away from the proximity switch;
the movement of the metal trigger rod is synchronous with the movement of the ignition valve, and when the metal trigger rod is closest to the proximity switch, the ignition valve is at a zero point.
Optionally, the trigger lever is rotated by a rotary driver; the length direction of the trigger bar is vertical to the rotating shaft of the rotary driver;
the rotary actuator rotationally controls the size of the passage of the ignition valve.
Optionally, the gas pipeline is connected with the stove through two pipelines to supply gas to the inner flame ring and the outer flame ring respectively.
Optionally, the ignition valve is connected to the bottom of the cooking plate by a groove-shaped fixing frame bent in a U shape.
Optionally, an I/O port of the electronic control system is connected to a photocoupler, and an ignition circuit is connected to the photocoupler.
Optionally, the ignition circuit comprises a resistor R and an N-channel MOS transistor connected to the photocoupler, the N-channel MOS transistor is connected to the dc relay, and a gate voltage is generated by a gate of the N-channel fet Q to control a normally open contact K of the dc relay to close.
Optionally, the thermistor is connected to an AD conversion interface of the electronic control system through a non-inverting amplifier.
The utility model provides an automatic gas ignition and extinguishing protection system of an intelligent cooker, a gas pipeline is communicated with a cooker to provide gas, and an ignition valve for controlling the size of a passage of the gas pipeline is arranged on the gas pipeline to adjust the amount of supplied gas; an ignition needle for ignition is arranged on the stove, an electric control system realizes ignition through the ignition needle and an ignition valve, the ignition valve supplies air to the stove, and opens the ignition needle to ignite the fuel gas discharged from the stove; set up the thermistor that is used for monitoring the stove fire temperature on the stove, the stove fire temperature difference can make thermistor produce different electromotive force signals, and electrical system receives thermistor's electromotive force signal to judge whether flame-out, control the ignition valve and close when flame-out, stop supplying gas to the stove, avoid the gas to leak when flame-out, guarantee safe in utilization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1A and 1B are schematic diagrams of an upper view and a lower view of an intelligent cooker gas automatic ignition extinguishing and protecting system, respectively;
FIG. 2 is a schematic view of the internal structure of the intelligent cooker without the housing of the gas auto-ignition extinguishing system;
FIG. 3A is a schematic view of the trigger lever closest to the proximity switch;
FIG. 3B is a schematic diagram of the trigger lever being out of the proximity switch;
fig. 4 is the circuit structure diagram of the gas automatic ignition and extinguishing system of the intelligent cooker.
The figure includes:
the gas stove comprises a gas pipeline 1, a stove 2, an ignition needle 21, a thermistor 22, an ignition valve 3, a proximity switch 4, a trigger lever 5, a rotary driver 51, a fixed frame 6 and a stove plate 7.
Detailed Description
The core of the utility model is to provide an intelligence machine of cooking gas autoignition puts out system of protecting, controls the ignition valve to close when putting out fire, stops to supply the gas to the stove.
In order to make those skilled in the art better understand the technical solution of the present invention, the following will explain the detailed description of the gas auto-ignition fire extinguishing and protection system of the intelligent cooker in combination with the accompanying drawings and the specific embodiments.
The utility model provides an automatic gas ignition and extinguishing system of an intelligent cooker, and a schematic diagram of an upper visual angle and a lower visual angle of the automatic gas ignition and extinguishing system of the intelligent cooker is respectively shown in a figure 1A and a figure 1B; FIG. 2 is a schematic view of the internal structure of the intelligent cooker without the housing of the gas auto-ignition extinguishing system; this system includes gas pipeline 1, and gas pipeline 1 is hollow pipeline, and gas pipeline 1 intercommunication air supply and stove 2 are in order to provide the gas, and the one end of gas pipeline 1 is connected in the air supply, and the other end is connected in stove 2, carries the gas of air supply to stove 2 departments, realizes the burning in stove 2 departments.
An ignition valve 3 for controlling the size of the gas path and an electromagnetic valve for controlling the on-off of the gas path are arranged on the gas pipeline 1; the electromagnetic valve can be opened completely to open the gas circuit, and the electromagnetic valve can be closed completely to close the gas circuit, and the electromagnetic valve is not marked in the figure, and the opening and closing of the electromagnetic valve is controlled by the electric control system. The ignition valve 3 is used for controlling the opening degree of the gas pipeline 1 and controlling the gas flow in the gas pipeline 1, so that the flame size is changed, the flame is large when the opening degree of the ignition valve 3 is large, and the flame is correspondingly small when the opening degree is small.
An ignition needle 21 for ignition and a thermistor 22 for monitoring the temperature of the furnace fire are arranged on the furnace 2; the ignition needle 21 and the thermistor 22 are both positioned beside a gas outlet, the ignition needle 21 is controlled by an electric control system, and electric sparks can be generated to ignite gas when the ignition needle is electrified to work; the thermistor 22 is close to the flame and used for sensing the temperature of the flame, the resistance value of the thermistor is different when the temperature is different, the electromotive force of the thermistor is influenced by the difference of the resistance values, and the temperature is detected by utilizing the change of the resistance values.
The electric control system controls the ignition needle 21, the ignition valve 3 and the electromagnetic valve to realize ignition; when in ignition, the electromagnetic valve is controlled to be opened, so that the gas in the gas source enters the gas pipeline 1, the ignition valve 3 is correspondingly opened, and the ignition valve 3 is kept at the maximum opening degree in the ignition stage under the normal condition, so that the flame is maximized, and the gas is convenient to ignite; the ignition needle 21 works while the gas is discharged, and electric sparks are generated to ignite the gas to generate flame, so that the ignition operation is completed; the whole ignition operation is completed by an electric control instruction controlled by an electric control system, the ignition valve does not need to be manually rotated in the traditional structure for ignition, and the automation degree is higher.
The electronic control system can receive the electromotive force signal of the thermistor 22, judge whether to extinguish, and control the ignition valve 3 and the electromagnetic valve to close when extinguishing. When the gas stove is normally combusted, the thermistor 22 is kept at a high electromotive force, when flame of the gas stove is accidently extinguished due to some reason, the electromotive force of the thermistor 22 is rapidly reduced, and when the CPU judges that the thermocouple rapidly reduces and does not receive a command of shutting off the gas, the CPU judges that the gas is accidently extinguished, controls the ignition valve 3 and the electromagnetic valve to be shut off, and finishes the operation of shutting off and protecting; the whole extinguishing and protecting operation is completed by electric control operation without human intervention, thereby ensuring the safety of gas use.
On the basis of the above scheme, the utility model discloses an intelligence fried dish machine gas automatic ignition puts out system of protecting still includes proximity switch 4 and metal trigger bar 5, and proximity switch 4 can be close to or kept away from to trigger bar 5, and when metal trigger bar 5 apart from proximity switch 4 distance when nearest, ignition valve 3 is at zero point, and its aperture is minimum when ignition valve 3's zero point, and the solenoid valve keeps closing simultaneously. The movement of the metal trigger rod 5 is synchronous with the movement of the ignition valve 3, when the metal trigger rod 5 is close to the proximity switch 4, the proximity switch 4 can be triggered to indicate that the ignition valve 3 is at a zero point position, the state of the ignition valve 3 is judged through whether the proximity switch 4 is triggered, when flameout occurs, if the proximity switch 4 is not triggered, the ignition valve 3 is not at the zero point position, and the electronic control system controls the ignition valve 3 to return to the zero point.
Preferably, the present invention provides a control structure of the trigger lever 5 and the ignition valve 3, wherein the rotary actuator 51 controls the passage size of the ignition valve 3; the rotary driver 51 can adopt the forms of a stepping motor and the like, the trigger rod 5 is driven by the rotary driver 51 to rotate, and the length direction of the trigger rod 5 is vertical to the rotating shaft of the rotary driver 51; the trigger rod 5 is connected to an output shaft of the rotary driver 51 through a connecting sleeve, and the rotary driver 51 can drive the trigger rod 5 to rotate, as shown in fig. 3A, which shows a schematic diagram of a state that the trigger rod 5 is closest to the position of the proximity switch 4, and at this time, the ignition valve 3 is in a zero point position; as shown in fig. 3B, a schematic diagram showing a state in which the trigger lever 5 is displaced from the proximity switch 4, in which the ignition valve 3 is not in the zero point position; the trigger lever 5 and the proximity switch 4 are controlled in a rotating mode, so that the structure is simple and the realization is convenient.
Of course, besides, the triggering rod 5 can also move linearly to approach and depart from the proximity switch 4, and these specific arrangement forms should be included in the protection scope of the present invention.
As shown in fig. 3A and 3B, the gas pipeline 1 is connected to the burner 2 through two pipelines, the gas pipeline 1 is connected to the gas source through a single pipeline and connected to the burner 2 through two independent pipelines, and the two pipelines supply gas to the inner flame ring and the outer flame ring respectively.
The ignition valve 3 is connected to the bottom of a stove plate 7 through a groove-shaped fixing frame 6 which is bent in a U shape; the proximity switch 4 is fixed on the side wall of the fixing frame 6, and the trigger rod 5 is positioned in the groove structure of the fixing frame 6, so that the proximity switch is convenient to integrate and install.
As shown in fig. 4, it is a circuit structure diagram of the gas automatic ignition and extinguishing system of the intelligent cooker; on the basis of any one of the above technical scheme and the intercombination thereof, the utility model discloses well electrical system's IO mouth connects optoelectronic coupler, and ignition circuit connects in optoelectronic coupler. The photoelectric coupler plays an isolation role and prevents the electric arc generated by the frequent action contact of the direct current relay from reversely impacting the CPU chip of the electric control system to damage the CPU chip.
The ignition circuit comprises a resistor R connected with the photoelectric coupler and an N-channel MOS tube, the N-channel MOS tube is connected with the direct current relay, and grid voltage is generated through a grid electrode of the N-channel field effect tube Q to control the normally open contact K of the direct current relay to be closed.
The thermistor 22 is connected to an AD conversion interface of the electronic control system through the non-inverting amplifier, and the digital ground GND of the non-inverting amplifier is isolated from the +24V driver ground 24VGND of the N-channel MOS transistor, so as to prevent an impact current from entering the digital ground, interfering with weak signal transmission of the thermocouple temperature sensor and even damaging a CPU chip of the electronic control system.
The ignition principle is as follows: the CPU chip of the electric control system enables the photoelectric coupler to generate input current by pulling down the level of the I/O port, current can be generated at the output end through the photoelectric effect, the grid electrode of the N-channel field effect transistor Q generates grid voltage through the resistor R, when the grid voltage meets the condition that the Q is conducted, the J coil of the direct current relay has current to pass through, and the normally open contact K of the J is closed. When the two ends of the wiring of the knob switch of the gas stove are connected to the two ends K, the knob switch is closed, and the ignition needle generates pulsating high-voltage sparks. When the CPU chip of the electric control system rotates the switch by rotating the stepping motor, the gas passes through the ignition needle, and the gas is ignited at the moment.
The automatic extinguishing and protecting principle of the fuel gas is as follows: the principle of the thermistor is that two homogeneous conductors with different components form a loop, when temperature difference exists at two ends, current can be generated in the loop, electromotive force can be generated at the two ends, the electromotive force generated by the principle of the thermistor is passive electromotive force, and the magnitude of the electromotive force is only related to the material of the thermocouple conductor and the temperature difference at the two ends. When the gas stove is not ignited, the temperature difference between two ends of the thermocouple is zero, and the electromotive force between the two ends is zero. When the stove works normally, the two ends of the thermocouple can generate electromotive force up to dozens of millivolts, and the electromotive force is amplified by the signal amplifier and enters an AD conversion interface of a CPU chip of the electric control system to form a temperature calibration value during normal work.
When the flame of the gas range is accidentally extinguished for some reason, the electromotive force of the thermocouple is rapidly reduced. Therefore, when the CPU of the electric control system judges that the thermocouple rapidly descends and does not receive a command of closing the gas, the gas is judged to be accidentally extinguished, and at the moment, the CPU of the electric control system immediately reversely drives the stepping motor to close the ignition valve and the electromagnetic valve, so that the protection effect of accidental gas extinguishment is achieved. The CPU of the electric control system continuously collects thermocouple temperature data at a speed of more than 10 times/second, and once the temperature of the thermocouple is monitored to rapidly decrease within unit time (less than 2 seconds), and a command of closing gas is not received, the CPU immediately drives the shutdown system to open and close the gas valve.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. An intelligent automatic fuel gas ignition and extinguishing protection system of a cooking machine is characterized by comprising a fuel gas pipeline (1), wherein the fuel gas pipeline (1) is communicated with a gas source and a stove (2) to provide fuel gas;
an ignition valve (3) for controlling the size of the gas path and an electromagnetic valve for controlling the on-off of the gas path are arranged on the gas pipeline (1);
an ignition needle (21) for ignition and a thermistor (22) for monitoring the temperature of the furnace fire are arranged on the furnace (2);
the electronic control system controls the ignition needle (21), the ignition valve (3) and the electromagnetic valve to realize ignition; and the electronic control system receives the electromotive force signal of the thermistor (22), judges whether to extinguish or not, and controls the ignition valve (3) and the electromagnetic valve to be closed when extinguishing.
2. The intelligent cooker gas automatic ignition and extinguishing system as claimed in claim 1, further comprising a proximity switch (4) and a metal trigger lever (5), wherein the trigger lever (5) can be close to or far away from the proximity switch (4);
the movement of the metal trigger rod (5) is synchronous with the movement of the ignition valve (3), and when the metal trigger rod (5) is closest to the proximity switch (4), the ignition valve (3) is at a zero point.
3. The automatic gas ignition and extinguishing system for the intelligent cooker as claimed in claim 2, wherein the trigger lever (5) is rotated by a rotary driver (51); the length direction of the trigger rod (5) is vertical to the rotating shaft of the rotating driver (51);
the rotary actuator (51) controls the size of the passage of the ignition valve (3) in a rotary manner.
4. The automatic gas ignition and protection system for the intelligent cooker as claimed in claim 3, wherein the gas pipeline (1) is connected with the cooker (2) through two pipelines to supply gas to the inner flame ring and the outer flame ring respectively.
5. The automatic gas ignition and extinguishing system for the intelligent cooking machine as claimed in claim 4, wherein the ignition valve (3) is connected to the bottom of the cooking stove plate (7) through a groove-shaped fixing frame (6) which is bent in a U shape.
6. The automatic gas ignition and extinguishing system for the intelligent cooking machine as claimed in any one of claims 1 to 5, wherein an I/O port of the electronic control system is connected with a photoelectric coupler, and an ignition circuit is connected with the photoelectric coupler.
7. The gas automatic ignition and extinguishing protection system of the intelligent cooker as claimed in claim 6, wherein the ignition circuit comprises a resistor R and an N-channel MOS tube connected to the photoelectric coupler, the N-channel MOS tube is connected to a DC relay, and a grid voltage generated by a grid of the N-channel FET Q controls a normally open contact K of the DC relay to be closed.
8. The automatic gas ignition and shutdown protection system for the intelligent cooker as claimed in claim 7, wherein the thermistor (22) is connected to an AD conversion interface of the electronic control system through a non-inverting amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921567695.6U CN210532465U (en) | 2019-09-19 | 2019-09-19 | Intelligent automatic gas ignition and extinguishing protection system for cooking machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921567695.6U CN210532465U (en) | 2019-09-19 | 2019-09-19 | Intelligent automatic gas ignition and extinguishing protection system for cooking machine |
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| CN210532465U true CN210532465U (en) | 2020-05-15 |
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| CN201921567695.6U Active CN210532465U (en) | 2019-09-19 | 2019-09-19 | Intelligent automatic gas ignition and extinguishing protection system for cooking machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750384A (en) * | 2020-07-16 | 2020-10-09 | 深圳市名剑日用品有限公司 | Gas stove capable of switching gas and preventing extinguishing |
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2019
- 2019-09-19 CN CN201921567695.6U patent/CN210532465U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750384A (en) * | 2020-07-16 | 2020-10-09 | 深圳市名剑日用品有限公司 | Gas stove capable of switching gas and preventing extinguishing |
| CN111750384B (en) * | 2020-07-16 | 2021-05-25 | 浙江省永康市金宇有限公司 | Gas stove capable of preventing extinguishing and switching gas |
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Effective date of registration: 20210223 Address after: Room 323, 3rd floor, 3333 Silicon Valley Street, Changchun hi tech Industrial Development Zone, Jilin Province Patentee after: CHANGCHUN TONGXING INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: Room 4025, 4th floor, Changchun Science and technology market, 3333 Silicon Valley Street, Changchun hi tech Industrial Development Zone, Jilin Province, 130000 Patentee before: Jilin Dongrun Intelligent Kitchen Equipment Co.,Ltd. |