CN111895459A - Gas stove forget-to-close reminder - Google Patents
Gas stove forget-to-close reminder Download PDFInfo
- Publication number
- CN111895459A CN111895459A CN202010784022.7A CN202010784022A CN111895459A CN 111895459 A CN111895459 A CN 111895459A CN 202010784022 A CN202010784022 A CN 202010784022A CN 111895459 A CN111895459 A CN 111895459A
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- reminder
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- 239000003990 capacitor Substances 0.000 claims description 11
- 230000005236 sound signal Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 55
- 235000013305 food Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention relates to a reminder for forgetting to turn off a gas stove, which comprises: the magnet is arranged on the knob switch of the gas stove; the warning unit includes: a magnetic switch disposed opposite to the magnet; the buzzer sounding module is connected with the magnetic switch and used for sounding an alarm prompt tone; the rectangular wave generating module is respectively connected with the magnetic switch and the buzzer sounding module and is used for generating rectangular waves with high and low levels and controlling the sounding time length and the sounding time interval of the buzzer sounding module; and the positive electrode of the power supply module is connected with the magnetic switch, and the negative electrode of the power supply module is respectively connected with the buzzer sounding module and the rectangular wave generating module to form a loop. The invention indirectly converts the visual flame into the sound signal, thereby relieving the manpower, realizing the burning of the fire when people move nearby, playing the role of reminding the gas stove to be forgotten, and reducing the occurrence of dangerous accidents.
Description
Technical Field
The invention belongs to the technical field of electronics, relates to a gas stove monitoring technology, and particularly relates to a gas stove forgetting-closing reminder.
Background
The gas stove is a necessary kitchen appliance in each family, and the family can cook three meals a day without opening the gas stove. However, the gas range requires input of natural gas or gas while power is supplied to provide a lighting power source or to implement some intelligent additional functions, and operating the gas range irregularly may cause a significant safety accident. For example, during cooking food for an extended period of time, people often wait for the food to cook well while doing other things. In such a situation, the gas stove is easy to forget to turn off, which can cause food scorching and even fire accidents.
In addition, there is a more dangerous situation in the use of gas cookers. That is, the switch knob of the gas stove is not reset to zero, and gas flows out from the stove mouth, but the ignition is not successful at the moment, and the gas is always in a leakage state. This situation can lead to a gradual rise in the gas concentration in the room, which is dangerous. Through market research, most gas stoves in the market cannot give a warning or automatically cut off gas when the above-mentioned situation occurs. Therefore, measures are required to reduce the probability of the above-described occurrence of accidents.
Disclosure of Invention
The gas stove forgetting-to-close reminder provided by the invention can remind a user that a gas stove is working and the gas stove is not forgotten to be closed, so that accidents are avoided.
In order to achieve the above object, the present invention provides a reminder for forgetting to turn off a gas stove, comprising: the magnet is arranged on the knob switch of the gas stove;
the warning unit includes:
a magnetic switch disposed opposite to the magnet;
the buzzer sounding module is connected with the magnetic switch and used for sounding an alarm prompt tone;
the rectangular wave generating module is respectively connected with the magnetic switch and the buzzer sounding module and used for generating rectangular waves with high and low levels and controlling the sounding time of the buzzer sounding module
Short and sounding intervals;
and the positive electrode of the power supply module is connected with the magnetic switch, and the negative electrode of the power supply module is respectively connected with the buzzer sounding module and the rectangular wave generating module to form a loop.
Furthermore, the reminder comprises a transparent shell, and the reminder unit is arranged inside the transparent shell.
Further, the reminding unit further comprises an indicator light module used for indicating the working state, the indicator light module comprises an indicator light, and the indicator light is connected between the magnetic switch and the negative electrode of the power supply module.
Furthermore, the indicator light module further comprises a current limiting resistor, and the current limiting resistor is connected between the indicator light and the negative electrode of the power supply module.
Furthermore, the reminding unit further comprises a toggle switch, one end of the toggle switch is connected with the anode of the power module, and the other end of the toggle switch is connected with the magnetic switch.
Preferably, the magnetic switch is a passive normally-closed magnetic switch, and is closed when the magnet is far away from the magnetic switch, and is opened when the magnet is nearest to the magnetic switch.
Preferably, the magnet is a magnet and is fixedly mounted on the gas stove knob switch through an annular elastic piece.
Preferably, the rectangular wave generating module comprises a 555 timer chip and a series circuit formed by serially connecting an adjustable resistor R1, an adjustable resistor R2 and a capacitor C1, a pin 1 of the 555 timer chip is grounded, a pin 2 TR and a pin 6 TH are connected together and then connected with a node between the adjustable resistor R2 and the capacitor C1, a pin 7 DC of the 555 timer chip is connected with a node between the adjustable resistor R1 and the adjustable resistor R2, a pin 4 VCC and a pin 8 RST of the 555 timer chip and the adjustable resistor R1 are both connected with a magnetic switch, a pin 3 OUT of the 555 timer chip outputs rectangular waves, and a pin 5 CON of the 555 timer chip H1 is grounded through a capacitor C2.
Preferably, the buzzer sound production module comprises a triode Q1 and a buzzer connected with a collector of a triode Q1, a base of the triode Q1 is connected with a No. 3 pin OUT of the 555 timer chip through a resistor R4, an emitting electrode of the triode is connected with a negative electrode of the power supply module, and the buzzer is connected with the magnetic switch.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) according to the gas stove turn-off forgetting reminder, visual flame is indirectly converted into the sound signal, manpower can be liberated, people can realize that fire is still burning when moving nearby, the gas stove turn-off forgetting reminder can be played, and dangerous accidents are reduced.
(2) The gas stove forgetting-to-close reminder provided by the invention adopts the non-physical contact magnetic switch, and the magnet is fixed on the gas stove knob switch through the annular elastic piece, so that the detection of the switch position is realized, the gas stove forgetting-to-close reminder is convenient to install on the existing gas stove product, and is easy to popularize and use.
(3) The reminding unit is vacuum-sealed by the transparent shell, namely the whole circuit part is sealed, and no metal point is exposed. On one hand, the oil smoke is prevented from entering the circuit, the reliability and the service life of the reminder are improved, and the reminder is convenient to clean and more attractive; on the other hand, the appearance of extra open fire is avoided, and danger cannot be caused under the condition that fuel gas is accidentally leaked.
(4) The gas stove forgetting-to-close reminder provided by the invention adopts a passive normally-closed magnetic switch. When the knob switch of the gas stove is reset and closed, the magnet is closest to the normally closed magnetic switch, the normally closed magnetic switch is disconnected, the reminder does not work, zero power consumption standby is realized, and the service time of the battery is greatly prolonged.
(5) According to the gas stove turn-off forgetting reminder provided by the invention, the rectangular wave generation module adopts a common universal 555 timer circuit to control the buzzer sounding module to sound, and the 555 timer chip outputs high level to enable the buzzer sounding module to sound. The high and low level time of the 555 timer chip can be respectively controlled, and a user can adjust the length and the time interval of the prompt tone according to own use experience, so that the user experience is improved. In addition, because a common universal 555 timer chip is adopted to build a circuit to form a rectangular wave generation module, programming is not needed, and the cost is low.
(6) According to the reminder for forgetting to turn off the gas stove, the power supply module is two commonly-used No. 5 batteries, a 220V alternating current power supply does not need to be additionally introduced, the reminder is convenient to install, and the safety and practicability are further improved.
Drawings
Fig. 1 is a schematic circuit diagram of a reminder for forgetting to turn off a gas stove according to an embodiment of the invention;
fig. 2 is an installation schematic diagram of a gas stove forgetting-closing reminder according to an embodiment of the invention.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
Example 1: referring to fig. 1 and 2, the invention provides a reminder for forgetting to turn off a gas stove, comprising:
a first magnet M1 mounted on the first knob switch S1 of the gas range through a first ring-shaped elastic member R1;
a second magnet M2 mounted on the second knob switch S2 of the gas range by a second ring-shaped elastic member R2;
the warning unit includes:
a first magnetic switch K1 disposed opposite to the first magnet M1;
a second magnetic switch K2 arranged opposite to the second magnet M2 and having a first magnetic property
The linear switches K1 are connected in parallel to form a magnetic switch parallel circuit;
the buzzer sounding module A2 is connected with the output end of the magnetic switch parallel circuit and is used for giving out alarm prompt sound;
the rectangular wave generating module A1 is respectively connected with the output end of the magnetic switch parallel circuit and the buzzer sounding module A2 and is used for generating high and low level rectangular waves and controlling the sounding time and the sounding time interval of the buzzer sounding module A2;
and the anode of the power supply module is connected with the input end of the magnetic switch parallel circuit, and the cathode of the power supply module is respectively connected with the buzzer sounding module A2 and the rectangular wave generating module A1 to form a loop.
With continued reference to fig. 2, the reminder device further comprises a transparent casing W1, and the reminder unit is mounted inside the transparent casing W1. On the one hand, seal the circuit of the reminding unit shown in figure 1 through transparent shell for inside preventing the oil smoke from entering the circuit, improve the reliability and the life of the reminder, and be convenient for clean, more pleasing to the eye. On the other hand, the circuit that adopts the shell to remind the unit seals, does not have the exposed metal point, has avoided extra naked light to appear, can not cause danger under the condition that the gas accident was revealed.
With continued reference to fig. 1 and 2, the reminding unit further includes an indicator light module for indicating the working state, the indicator light module includes an indicator light D1, and the indicator light D1 is connected between the output end of the magnetic switch parallel circuit and the negative electrode of the power supply module. The whole reminder is electrified, the indicating lamp is lightened, the reminder works, and if the indicating lamp is not lightened, the reminder does not work.
With continued reference to fig. 1 and 2, the indicator light module further includes a current limiting resistor R3, and the current limiting resistor R3 is connected between the indicator light D1 and the negative electrode of the power module. In this embodiment, the resistance of the current limiting resistor R3 is 2k Ω, which is used to limit the current of the indicator light D1 and prevent the indicator light D1 from being burned out due to excessive current.
With continued reference to fig. 1 and 2, the reminding unit further includes a toggle switch K3, one end of the toggle switch K3 is connected to the positive electrode of the power module, and the other end is connected to the input end of the magnetic switch parallel circuit. The toggle switch K3 is closed by manual shifting, the whole reminder can work as expected, and the function of reminding the gas stove of forgetting to turn off is realized; the manual dialing turns off the toggle switch K3, and the whole reminder does not work all the time. And a user manually controls the on-off of the toggle switch K3 according to actual requirements, so that the function of reminding or not reminding the gas stove of forgetting to turn off is realized.
Specifically, the first magnetic switch K1 and the second magnetic switch K2 both adopt a passive normally-closed magnetic switch, when the first magnet M1 is far away from the first magnetic switch K1, the first magnetic switch K1 is closed, and when the first magnet M1 is nearest to the first magnetic switch K1, the first magnetic switch K1 is opened; likewise, when the second magnet M2 is distant from the second magnetic switch K2, the second magnetic switch K2 is closed, and when the second magnet M2 is nearest to the second magnetic switch K2, the second magnetic switch K2 is opened. In this embodiment, the passive normally-closed magnetic switch is a passive normally-closed magnetic induction dry reed switch.
In this embodiment, the magnet is a magnet and is fixedly mounted on the gas stove knob switch through an annular elastic member. Specifically, the magnet is a rectangular magnet, but is not limited to a rectangular magnet, and may have other shapes such as a circle, an ellipse, and a square. The annular elastic body is an annular rubber member, such as an annular rubber band, and can be an elastic member made of other elastic materials, and is not limited to a rubber member.
In this embodiment, with reference to fig. 1, the rectangular wave generating module includes a 555 timer chip H1 and a series circuit formed by serially connecting an adjustable resistor R1, an adjustable resistor R2 and a capacitor C1, the pin 1 of the 555 timer chip H1 is grounded, the pin 2 TR and the pin 6 TH are connected together and then connected to a node between the adjustable resistor R2 and the capacitor C1, the pin 7 DC of the 555 timer chip H1 is connected to a node between the adjustable resistor R1 and the adjustable resistor R2, the pin 4 VCC and the pin 8 RST of the 555 timer chip H1 and the adjustable resistor RST 1 are both connected to an output end of the magnetic switch parallel circuit, the pin 3 OUT of the 555 timer chip H1 outputs a rectangular wave, and the pin 5 CON of the 555 timer chip H1 is grounded through the capacitor C2.
In this embodiment, with reference to fig. 1, the buzzer sounding module includes a transistor Q1 and a buzzer B1 connected to a collector of a transistor Q1, a base of the transistor Q1 is connected to a pin OUT No. 3 of the 555 timer chip H1 through a resistor R4, an emitter of the transistor is connected to a negative electrode of the power module, and the buzzer B1 is connected to an output end of the magnetic switch parallel circuit. Specifically, the buzzer B1 is used to give an alarm sound to remind the user that the gas range is still working. The Q1 is a 9013NPN type triode and is used for improving the driving power. The resistance of the resistor R4 is 1k omega, and the resistance of the resistor R5 is 10k omega. R4 is used to limit the current input to transistor Q1, preventing excessive current from burning out Q1; r5 adopts a large resistance value of 10k omega, and pulls down the base of Q1 to a determined low level, thereby preventing the unstable level of A1 output from generating false operation.
Specifically, the time th of the high state of the 555 timer chip H1 determines the length of the sounding time of the buzzer B1, and the calculation formula of the time th of the high state is as follows:
th＝0.693(R1+R2)C1 (1)
the time tl of the low level state determines the sounding interval of the buzzer, and the calculation formula of the time tl of the low level state is
tl＝0.693R2C1 (2)
The values of R1, R2, C1 and C2 need to be adjusted according to the sounding time and the time interval of the actual buzzer, and finally the purpose of reminding and not interfering the user is achieved. In this example, a set of reference values is given: the adjustable range of R1 and R2 is 0k omega-15 k omega, the capacitance value of the capacitor C1 is 100 muF, and the capacitance value of the capacitor C2 is 470 pF.
It should be noted that the circuit in the rectangular wave generation block a1 and the circuit in the buzzer sound emission block a2 in the present embodiment are not limited to the above-described structures. When the gas stove forget-to-close reminder is specifically manufactured, other circuits A1 and A2 can be adopted, or existing module products are adopted, and rectangular wave generation and buzzer sounding can be achieved respectively.
When the reminder for forgetting to turn off the gas stove works, when the first knob switch S1 and the second knob switch S2 of the gas stove are at initial positions, the first magnet M1 and the second magnet M2 are closest to the first magnetic switch K1 and the second magnetic switch K2, the first magnetic switch K1 and the second magnetic switch K2 are disconnected, the whole reminder is not powered on, and zero power consumption standby is realized; when the first knob switch S1 and the second knob switch S2 are pressed and rotated to ignite the gas cooker, the first magnet M1 and the second magnet M2 rotate along with the first knob switch S1 and the second knob switch S2, the first magnet M1 and the second magnet M2 are far away from the first magnetic switch K1 and the second magnetic switch K2, and the first magnetic switch K1 and the second magnetic switch K2 are closed. At this time, the whole reminder is powered on, and the indicator light D1 lights up to remind that the reminder is working. The rectangular wave generation module A1 outputs rectangular waves to drive the buzzer sound production module A2 to make a sound, so that a user is reminded that the gas stove works and does not forget to close the gas stove, and accidents are effectively avoided.
This embodiment the reminder is forgotten to close of gas-cooker is applicable to two kitchen ranges gas-cooker, can install it in current split type two kitchen ranges gas-cooker or the two kitchen ranges gas-cooker of integrated form, makes the gas-cooker send the prompt tone after striking sparks, reminds the user not to forget to close the gas-cooker.
Example 2: the embodiment provides a reminder for forgetting to turn off a gas stove, which is different from embodiment 1 in that in the embodiment, one magnet and one magnetic switch are arranged, and the working principle of the reminder is the same as that of embodiment 1, which is not described herein again. The gas stove turn-off forgetting reminder in the embodiment is suitable for a single-cooking-top gas stove, and can be installed in the existing split type single-cooking-top gas stove or integrated type single-cooking-top gas stove, so that the gas stove emits a prompt tone after being ignited, and reminds a user not to forget to turn off the gas stove.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are possible within the spirit and scope of the claims.
Claims (9)
1. The utility model provides a gas-cooker forgets to close reminiscences which characterized in that includes:
the magnet is arranged on the knob switch of the gas stove;
the warning unit includes:
a magnetic switch disposed opposite to the magnet;
the buzzer sounding module is connected with the magnetic switch and used for sounding an alarm prompt tone;
the rectangular wave generating module is respectively connected with the magnetic switch and the buzzer sounding module and is used for generating rectangular waves with high and low levels and controlling the sounding time length and the sounding time interval of the buzzer sounding module;
and the positive electrode of the power supply module is connected with the magnetic switch, and the negative electrode of the power supply module is respectively connected with the buzzer sounding module and the rectangular wave generating module to form a loop.
2. The gas stove closing forgetting reminder according to claim 1, further comprising a transparent outer shell, wherein the reminder unit is installed inside the transparent outer shell.
3. The gas stove forgetting-to-turn-off reminder as claimed in claim 2, wherein the reminding unit further comprises an indicator lamp module for indicating the working state, the indicator lamp module comprises an indicator lamp, and the indicator lamp is connected between the magnetic switch and the negative electrode of the power supply module.
4. The gas stove forgetting-to-turn-off reminder as claimed in claim 3, wherein the indicator light module further comprises a current limiting resistor, and the current limiting resistor is connected between the indicator light and the negative electrode of the power supply module.
5. The gas stove forgetting-to-turn-off reminder as claimed in claim 3 or 4, wherein the reminding unit further comprises a toggle switch, one end of the toggle switch is connected with the anode of the power module, and the other end of the toggle switch is connected with the magnetic switch.
6. The gas stove closing forgetting reminder according to claim 5, wherein the magnetic switch is a passive normally closed magnetic switch, and when the magnet is far away from the magnetic switch, the magnetic switch is closed, and when the magnet is nearest to the magnetic switch, the magnetic switch is opened.
7. The gas stove forgetting to close reminder as claimed in claim 6, wherein the magnet is a magnet and is fixedly mounted on the knob switch of the gas stove through an annular elastic member.
8. The gas stove forgetting-to-turn-off reminder as claimed in claim 7, wherein the rectangular wave generating module comprises a 555 timer chip and a series circuit formed by serially connecting an adjustable resistor R1, an adjustable resistor R2 and a capacitor C1, pin 1 of the 555 timer chip is grounded, pin 2 TR and pin 6 TH are connected together and then connected with a node between the adjustable resistor R2 and the capacitor C1, pin 7 DC of the 555 timer chip is connected with a node between the adjustable resistor R1 and the adjustable resistor R2, pin 4 VCC and pin 8 RST of the 555 timer chip and the adjustable resistor R1 are both connected with a magnetic switch, pin 3 OUT of the 555 timer chip outputs rectangular waves, and pin 5 CON of the 555 timer chip H1 is grounded through a capacitor C2.
9. The gas stove forgetting-to-turn-off reminder as claimed in claim 8, wherein the buzzer sounding module comprises a triode Q1 and a buzzer connected with a collector of a triode Q1, a base of the triode Q1 is connected with a No. 3 pin OUT of the 555 timer chip through a resistor R4, an emitter of the triode is connected with a negative electrode of the power supply module, and the buzzer is connected with the magnetic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010784022.7A CN111895459A (en) | 2020-08-06 | 2020-08-06 | Gas stove forget-to-close reminder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010784022.7A CN111895459A (en) | 2020-08-06 | 2020-08-06 | Gas stove forget-to-close reminder |
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| CN111895459A true CN111895459A (en) | 2020-11-06 |
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| CN202010784022.7A Pending CN111895459A (en) | 2020-08-06 | 2020-08-06 | Gas stove forget-to-close reminder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413657A (en) * | 2020-11-20 | 2021-02-26 | 丁贯哲 | Stove monitoring and protecting device |
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| CN103942930A (en) * | 2014-04-23 | 2014-07-23 | 吴钰瑶 | Reminding device for preventing key from being forgotten to be pulled |
| CN204695487U (en) * | 2015-05-02 | 2015-10-07 | 温州高新技术产业开发区聚智汇科技信息咨询服务中心 | A kind of fire alarm circuit |
| CN208587929U (en) * | 2018-05-16 | 2019-03-08 | 卢念江 | Knob, gear signal detection and emitter and wireless reminding device |
| CN109509328A (en) * | 2018-12-28 | 2019-03-22 | 武汉工程大学 | A kind of combustion gas closing alarm set |
| CN209310050U (en) * | 2018-12-20 | 2019-08-27 | 霍誉文 | A kind of kitchen security alerting system |
| CN110793070A (en) * | 2019-11-15 | 2020-02-14 | 魏超强 | Gas-cooker, integrated gas-cooker magnetic induction hall rotary switch view pilot lamp |
-
2020
- 2020-08-06 CN CN202010784022.7A patent/CN111895459A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942930A (en) * | 2014-04-23 | 2014-07-23 | 吴钰瑶 | Reminding device for preventing key from being forgotten to be pulled |
| CN204695487U (en) * | 2015-05-02 | 2015-10-07 | 温州高新技术产业开发区聚智汇科技信息咨询服务中心 | A kind of fire alarm circuit |
| CN208587929U (en) * | 2018-05-16 | 2019-03-08 | 卢念江 | Knob, gear signal detection and emitter and wireless reminding device |
| CN209310050U (en) * | 2018-12-20 | 2019-08-27 | 霍誉文 | A kind of kitchen security alerting system |
| CN109509328A (en) * | 2018-12-28 | 2019-03-22 | 武汉工程大学 | A kind of combustion gas closing alarm set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112413657A (en) * | 2020-11-20 | 2021-02-26 | 丁贯哲 | Stove monitoring and protecting device |
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Application publication date: 20201106 |
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