CN2608858Y - Automatic fire-closed gas range according to setting time - Google Patents

Abstract

The utility model discloses a gas stove that can automatically turn off the fire according to the set time, which includes a gas stove shell, a gas valve knob shaft, and is characterized in that it is also equipped with a power switch, a timing switch, a micro-motor, a cam and a limit switch. The timer switch, the limit switch and the cam together constitute the start-stop control part of the micro-motor. When the valve knob shaft is in the position of opening the gas valve, the contact of the cam and the limit switch is separated, so that the limit switch is connected to the micro-motor. The connected circuit, the micro motor still does not work at this time, only when the timer switch automatically connects the micro motor power supply circuit after the set time is completed, the micro motor rotates in the set direction, and drives the air valve knob shaft to rotate through mechanical transmission , close the air valve, and the cam fixed on the air valve knob shaft just presses down the contact of the limit switch to disconnect the micro-motor circuit. This novel gas stove eliminates the unsafe trap that may be produced when the user fails to turn off the fire on time, making it safer to use.

Description

The gas stove can be automatically turned off according to the set time

Technical field

The utility model relates to a gas stove, specifically a gas stove which can automatically turn off the fire according to the set time.

technical background

The gas stoves currently seen do not have the function of automatically turning off the fire according to the set time. When the gas stoves that rely on manual turning off the fire are used for a long time such as boiling water or steaming or cooking food, most users leave the fire. When being distracted by forgetfulness or other things, the phenomenon of not being able to turn off the fire on time often occurs. The light ones cause overcooking, and the severe ones burn the cooking utensils, or even major accidents such as fires, resulting in waste of property and energy.

Contents of the invention

The technical scheme adopted by the utility model to solve the technical problems is: it includes a gas stove shell, a gas valve knob shaft, and its characteristic is that it is also provided with a power switch, a timing switch, a micro-motor, a cam and a limit switch. The body is provided with a power switch, a timing switch and a micro-motor, and the time setting parts of the power switch button and the timing switch are located outside the housing; The housing cavity is mechanically connected with the gas valve knob shaft, and the cam is fixed on the gas valve knob shaft, and is in contact with the limit switch contact installed in the gas stove cavity for pressing and breaking away.

When using automatic fire-off; the gas valve knob shaft is in the position of opening the gas valve. At this time, the contact of the cam and the limit switch is separated, so that the micro-motor is connected to the circuit, but at this time the micro-motor still does not work. Only when the timing switch When the micro-motor power supply circuit is automatically connected after the set time is completed, the micro-motor rotates in the set direction, and drives the air valve knob shaft to rotate through mechanical transmission to close the air valve. At this time, the cam fixed on the air valve knob shaft Depress the limit switch contact just enough to disconnect the micromotor phone.

The above-mentioned micro-motor shaft and the air valve knob shaft are coaxial, thereby realizing the mechanical transmission between the two.

A belt pulley is respectively installed on the above-mentioned micro-motor shaft and the air valve knob shaft, and a transmission belt is arranged between the two pulleys, thereby realizing the mechanical transmission between the micro-motor shaft and the air valve knob shaft.

The above-mentioned limit switch is composed of a two-position switch, one of which is turned on and the other is turned off, and controls the on-off of the audio alarm device and the power supply of the micro-motor respectively.

A fuse is also provided in the above circuit.

The beneficial effects of the utility model are: fundamentally eliminate the unsafe hidden danger that the user forgets to turn off the fire when the user leaves the scene when using the fire for a long time, and plays the roles of safety, saving cooking utensils, energy and convenience. At the same time, the gas cooker can complete the cooking function with time requirement on time.

Description of drawings

Fig. 1 is the schematic circuit diagram of the utility model

Figure 2 is a schematic diagram of the setting method of the timing switch panel

Fig. 3 is a schematic diagram of a structure of the utility model

Figure 4 is a side view of Figure 3

Fig. 5 is a schematic diagram of a structure of the utility model

Below in conjunction with accompanying drawing and embodiment the utility model is further described

In the figure: 1. Power switch 2. Fuse 3. Timing switch 4. Limit switch 5. Cam 6. Audio alarm device 7. Micro motor 8. Timing switch panel 9. Setting button 10. Time button 11. Start button 12. Decimal point 13. Digital display 14. Gas stove shell 15. Rotor shaft 16. Oil bearing 17. Gas stove valve 18. Compression spring 19. Screws and nuts 20. Support sleeve 21. Set screw 22. Gas valve Twist shaft 23, pulley 24, belt 25, small pulley

specific implementation plan

Visible by Fig. 1, the utility model is mainly made up of power switch 1, fuse 2, timing switch 3, limit switch 4, cam 5, warning device 6, micro-motor 7 etc.

The utility model concrete structure type is shown in Fig. 2 to Fig. 5 respectively, now divides and describes as follows:

FIG. 2 shows a schematic diagram of a structural form of the time setting part of the timer switch. It is suitable for a key-type electronic timing switch, and the time range can be set: 0.1-99.9 minutes, and the time displayed on the digital display 13 is in minutes. The decimal point 12 requires the same brightness as the displayed number. When setting the time, press the setting key 9 first to make the timing switch enter the setting state. The setting of the time is completed by three time buttons 10. The three time buttons are respectively 10 minutes key, 1 minute key, and 0.1 subkey. Press the corresponding number on the time key digital display screen 13 to add 1 (i.e. change from 0-9) after the time is set, press the start key 11, and the timing switch enters the automatic timing state. Decrease from 0.1 minutes as time goes by, until all the numbers are zero, the circuit is automatically connected. The installation of electronic timing should consider easy operation and heat isolation. The board of the timer should protrude from the plane where it is installed, and cover the board of the timer with a transparent plastic buckle cover to prevent water and bump damage. There are many kinds of timing switches, for example, it also can adopt the knob-type mechanical type timing switch, because this type of technology is not difficult to imagine for those of ordinary skill in the art, so it is no longer repeated.

Fig. 3, Fig. 4 provide a kind of construction mode between each parts of the utility model except fuse, power switch, timer switch. The micro-motor 7 is installed on the gas cooker housing 14 by screws, nuts 19 and support sleeves 20 . The air valve knob shaft is replaced by the micro-motor rotor shaft 15, that is, the two are altogether one shaft. The limit switch is installed on the housing of the micro-motor, and the cam 5 assembled on the rotor shaft 15 is an eccentric wheel, and the rotor shaft should be in the position of closing the air valve 17 during assembly. Adjust the high point of cam 5 to make it reliably depress the contact of limit switch 4 by the direction of rotation of micromotor closing gas valve, then tighten with set screw 21. When the micro-motor shaft is in the position of opening the air valve, the contacts of the cam 5 and the limit switch 4 are disengaged, and the limit switch is connected to the circuit connected to the micro-motor. At this time, the micro-motor still does not work. After the set time, the timing switch automatically connects the micro-motor power supply circuit, and the micro-motor rotates by the set direction, and closes the gas stove valve 17. It disconnects the micromotor circuit.

In order to meet the ignition requirements of the gas cooker, the rotor shaft 15 of the micro-motor can be moved axially, and the moving distance should meet the ignition stroke requirements, and the reset of the rotor shaft is realized by the compression spring 18. The oil-impregnated bearing 16 can rotate flexibly and reduce the manufacturing cost of the micro-motor.

Fig. 5 provides another structure among the components of the utility model except the fuse, the power switch and the timer switch. Compared with the previous construction method, the main difference lies in the change of the mechanical transmission mode between the micro-motor shaft and the air valve knob shaft. The mechanical transmission mode is: a small pulley 25 and The pulley 23, the transmission between them is realized by the belt 24, the size of the torque can be adjusted by changing the diameter of the two pulleys, if the wrap angle of the belt is too small to reach the required friction torque, a toothed belt structure can also be used , the installation of the micro-motor should consider the requirement of adjusting the tightness of the belt, the cam 5 is fixed on the valve knob shaft 22, and the assembly method of the cam 5 is consistent with the corresponding requirements of the previous specific embodiment.

It should be noted that the specific transmission modes of the present invention given above are not exhaustive, such as gear transmission. Since these specific transmission modes are not difficult for those skilled in the art to imagine, they will not be repeated here.

In order to enable the utility model to inform the user that the gas stove has been automatically turned off when the fire is automatically turned off, an audio alarm device 6 is provided in Fig. 1. Composed of two bits, respectively control the power on and off of the micro-motor and the audio alarm device. However, the present invention can also be used without an alarm device in practical applications. In this case, the limit switch 4 can be composed of a one-position switch.

In order to protect the used electrical device of the utility model, a fuse 2 is also provided in the circuit of Fig. 1, and it is also possible not to arrange a fuse certainly.

When the operating voltage of the electrical device used in the utility model is not 220V, a power transformer can be added in the circuit to meet the electricity requirements.

Claims (5)

1. can close fire gas combustion range automatically by setting-up time, it comprises gas-cooker housing, air valve knob axle, it is characterized in that it also is provided with power switch, time switch, micro machine, cam and limit switch, on the gas-cooker housing, be provided with power switch, time switch and micro machine, and make time of power switch button and time switch that parts are set to be positioned at hull outside; This time switch and limit switch have been formed the micro machine control circuit jointly, micro machine is connected with the air valve knob shaft mechanical in the gas combustion stove casing body cavity, cam is fixed on the air valve knob axle, and be installed in limit switch contact in the gas-cooker chamber depressing and getting in touch of breaking away from arranged.

2. according to claim 1ly can close fire gas combustion range automatically, it is characterized in that described micro machine and air valve knob axle are one altogether, realize described machine driving between the two thus by setting-up time.

3. according to claim 1ly can close fire gas combustion range automatically by setting-up time, it is characterized in that respectively installing on described micro-motor, the air valve knob axle belt pulley, between two belt pulleys, driving-belt is set, realizes the described machine driving between micro-motor and the air valve knob axle thus.

4. describedly can close fire gas combustion range automatically according to claim 1,2 and 3, it is characterized in that described limit switch is made of the two-position switch of a tunnel connecting, another road disconnects, and controls audio alerting unit and described micro-motor power supply break-make respectively by setting-up time.

5. according to claim 4ly can close fire gas combustion range automatically, it is characterized in that also being provided with in the described circuit fuse by setting-up time.

Images