CN201507959U - Safety device for gas stove - Google Patents

Abstract

The utility model discloses a safety device of a gas stove, which mainly comprises a thermocouple and an electromagnetic valve which are connected by a lead; an auxiliary coil is additionally arranged on an iron core which is wound with a conductive coil in the electromagnetic valve, so that the electrical characteristics of the two coils are opposite when the two coils are respectively actuated and excited; the electromagnetic valve is provided with an interface end, and the electromagnetic valve is connected to the thermocouple and electrically connected with the electronic controller through an interface end lead wire, so that the electromagnetic valve is actuated by the electric signals of the thermocouple and the electronic controller. The electromagnetic valve has iron core with conducting coil wound and auxiliary coil to make the two coils have opposite electric characteristics, and the electronic controller connected via the interface of the electromagnetic valve can sense the gas burning condition and transmit electric signal to the conducting coil or the auxiliary coil to help the adsorption of the electromagnetic valve and to make the gas pipeline conducting or to eliminate the adsorption magnetic field damage of the electromagnetic valve to shield the gas pipeline.

Description

Gas stove safety device

technical field

The utility model relates to a safety device for a gas stove, in particular to a safety device for a thermocouple and an electromagnetic valve used in a gas stove.

Background technique

When the user turns on the gas switch by pressing and turning, the gas switch will brake the ignition device to ignite, and at the same time, the thimble device will press the valve stem of the solenoid valve, so that the valve stem will be pushed to the excitation part of the solenoid valve, and the solenoid valve will be opened. The valve, and then open the gas pipeline channel, so that the gas can be transmitted to the burner and ignited and burned; at this time, the thermocouple placed on the burner starts to be heated and converts thermoelectric energy, so an electrical signal can be sent to the Solenoid valve makes the excitation current flow through the conductive coil on the iron core in the solenoid valve to generate magnetic force, and the magnetic force continues to attract the valve stem to maintain the smooth output of gas in the gas pipeline, so that the gas can be supplied to the burner for combustion heating.

When the burner is burning and heating, if the flame is turned off under abnormal conditions, the thermocouple will not be able to generate enough electrical signals to the solenoid valve due to the detected temperature drop, which will cause the iron core in the solenoid valve to fail to generate enough magnetic force for continuous adsorption The valve stem, so the valve stem will drive the valve plug to reset, cover the gas pipeline, and cut off the gas output. This is the basic structure of the gas stove safety device.

However, in the actual operation of the above situation, the following problems are often encountered: when the stove is just turned on and ignited, because the thermocouple does not have enough time to preheat, it cannot sense enough heat energy in time and correspond to enough electrical signals , so the iron core in the solenoid valve cannot be excited to generate enough magnetic force, so that the solenoid valve in the gas switch cannot be magnetically attracted. When the user releases the gas switch, the gas pipeline will be covered again due to insufficient suction of the solenoid valve, blocking Broken gas path and unable to keep stove burning.

Therefore, when the user starts the gas switch, he must keep the pressure-rotating state for several seconds until the thermocouple can sense enough heat energy to generate enough electrical signals, that is, the user needs to help the thermocouple warm up when starting the gas switch. , in order to keep the gas pipeline in a conductive state, so that the thermocouple has enough time to convert heat energy into electrical energy, and the solenoid valve can maintain adsorption; from the above, we can see that there are still some safety devices in the current gas stove. shortcoming.

Utility model content

In view of this, the technical problem to be solved by the utility model is to provide a gas stove safety device with simple structure and excellent function.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is realized as follows: the safety device of the gas stove mainly includes a thermocouple, which is arranged at the gas burning hole of the inner burner of the gas stove. The solenoid valve is connected with the thermocouple by wires and is arranged on the gas switch of the gas stove. There is an electromagnet with a conductive coil wound on the iron core in the solenoid valve. An auxiliary coil is added to the iron core wound with a conductive coil in the electromagnetic valve, so that the electrical characteristics of the two coils are opposite when they are respectively activated and excited; The couple is electrically connected with the electronic controller, so that the solenoid valve is actuated by the electrical signal of the thermocouple and the electronic controller.

The technical effect achieved by the utility model is as follows: when starting the gas switch, before the thermoelectric energy conversion of the thermocouple is reached, the electronic controller sends an electrical signal to the electromagnetic valve for excitation in time, so that when the gas switch is turned on, it is pushed to the electromagnetic valve by the top pressure. The stem of the valve can be kept in an adsorbed state to ensure that the gas pipeline can remain open and continuously supply gas to the burner for combustion. Users no longer need to continuously press and turn the gas switch to help the thermocouple preheat to maintain the fire combustion.

At the same time, the electronic controller is connected through the interface end of the solenoid valve, and the electronic controller transmits the electrical signal sent through the interface end of the solenoid valve to the conductive coil or auxiliary coil in the solenoid valve according to the use of the gas stove. Make the electromagnetic valve generate adsorption or reset action, and then control the conduction or closure of the gas pipeline.

When the control power supply of the conductive coil and the auxiliary coil is common anode grounding, the electrical signal sent by the electronic controller is transmitted to the conductive coil of the solenoid valve, so that the solenoid valve is excited and adsorbed in the direction. When the electronic controller sends the same electrical signal, it is sent to the solenoid valve. When the auxiliary coil of the valve is used, it will reversely destroy the magnetic field in the solenoid valve, so that the solenoid valve will stop maintaining adsorption and recover; similarly, when the control power supply of the conductive coil and the auxiliary coil is common cathode grounding, the electric current sent by the electronic controller When the signal is sent to the auxiliary coil of the solenoid valve, the solenoid valve will be magnetically attracted in the forward direction. When the electronic controller sends the same electrical signal to the conductive coil of the solenoid valve, it will reversely destroy the magnetic field in the solenoid valve, making the solenoid valve The valve stops maintaining adsorption and resets, covering the gas pipeline.

The conductive coil of the solenoid valve is provided with an interface end, and the solenoid valve is electrically connected to the thermocouple and the electronic controller through the interface end, and the wire receives the electrical signal from the thermocouple and the electronic controller to control the action of the solenoid valve; The auxiliary coil of the valve is also provided with an interface terminal, and the electronic controller can send an electrical signal to the conductive coil or auxiliary coil of the solenoid valve in a timely manner according to the use of the gas stove, so that the solenoid valve remains adsorbed and the gas pipeline is turned on, or The solenoid valve is reset to cover the gas pipeline, and other control devices can be used to make the functions of the gas stove more diversified.

The utility model can improve the safety and convenience of using the gas stove by controlling the structure and mode of different power supply polarities.

Description of drawings

Fig. 1 is the structural schematic diagram of the solenoid valve of the first embodiment of the present utility model;

Fig. 2 is the schematic diagram of the first embodiment of the utility model thermocouple and electromagnetic valve;

Fig. 3 is the second embodiment schematic diagram of thermocouple and solenoid valve of the present invention;

Fig. 4 is the schematic diagram of the third embodiment of the utility model thermocouple and electromagnetic valve;

Fig. 5 is a flow chart of the action of the gas stove provided with the utility model.

Explanation of reference signs:

1 thermocouple 200 compression spring

2 solenoid valve 201 valve plug

20 Valve stem 21 Conductive coil

22 core 35d interface end

23 Auxiliary coil 40 A wire

3 interface terminal 41 wires

30a interface end 42c wire

300 first terminal 43 D wire

301 Second terminal 44 Auxiliary wiring

31b interface terminal 44'auxiliary wiring

310 third terminal 5 terminal clip

311 fourth terminal 50 common connector

32a connector 500 first contact

33b connector 501 second contact

34c interface port

A gas stove

B Whether the gas pipeline channel and ignition device are open

C Linkage top pressure solenoid valve plug

D ignition

E Whether to ignite gas

F Thermocouple senses gas combustion heat and converts heat energy into electrical energy

G Whether the solenoid valve is adsorbed, and whether the gas pipeline is open

H burner heating

I Electronic controller

J Ignition detector

K Timing device

L dry burn detector

M Ignition timing adsorption device

Detailed ways

In order to have a more detailed and clear understanding of the purpose, effect and structural features of the present utility model, the following preferred embodiments are listed and explained as follows in conjunction with the accompanying drawings:

Please refer to Fig. 1 and Fig. 2, as shown in the figure, the gas stove safety device described in the utility model includes a thermocouple 1 and a solenoid valve 2, and the solenoid valve 2 is arranged on the gas switch of the gas stove. One end of the electromagnetic valve 2 is provided with a valve stem 20, the valve stem 20 is installed in the compression spring 200, the end of the valve stem 20 is connected with a valve plug 201, the electromagnetic valve 2 is provided with an interface end 3, and the electromagnetic valve 2 is provided with an interface end 3. The valve 2 is connected to the a connector 32 connected to the thermocouple 1 through the interface port 3, and is electrically connected to the b connector 33 connected to the electronic controller, so as to receive the electrical signal from the thermocouple 1 and the electronic controller, and then control The solenoid valve 2 is actuated.

An a-interface end 30 is provided between the thermocouple 1 and the conductive coil of the solenoid valve 2, and a first terminal 300 and a second terminal 301 are arranged on the a-interface end 30, and the solenoid valve 2 is wound with An auxiliary coil 23 is added on the iron core 22 of the conductive coil 21, the conductive coil 21 and the auxiliary coil 23 are in a common ground shape and the winding direction is opposite or the excitation magnetic direction is opposite; the electronic controller and the auxiliary coil 23 of the solenoid valve 2 A b-interface end 31 is disposed therebetween, and a third terminal 310 and a fourth terminal 311 are disposed on the b-interface end 31 .

The first terminal 300 is the common ground terminal of the thermocouple 1 and the solenoid valve 2, and is grounded together with one end of the conductive coil 21 and the auxiliary coil 23 in the solenoid valve 2, and the other end of the conductive coil 21 Respectively connected to the second terminal 301 of the a interface end 30 of the solenoid valve 2 and the third terminal 310 of the b interface end 31, and the other end of the auxiliary coil 23 is connected to the b interface end 31 of the solenoid valve 2 The fourth terminal 311 of the fourth terminal 311; through the above structure, when the conductive coil 21 or the auxiliary coil 23 is excited, the electrical characteristics of the two coils are opposite (for the core 22) when they are respectively excited, so that the Solenoid valve 2 produces the action of adsorption or return.

This embodiment is combined in a clamping manner, the a interface end 30 connecting the thermocouple 1 and the solenoid valve 2 is connected to the a joint 32, and the b interface end 31 connected to the electronic controller is connected to the b joint 33. Wherein, the A wire 40 connected to the first terminal 300 is the ground wire of the thermocouple 1, and is grounded together with the ground ends of the conductive coil 21 and the auxiliary coil 23; the B wire connected to the second terminal 301 41 is the power output line of the thermocouple 1, and the conductive coil 21 of the solenoid valve 2 is connected to the power output line of the thermocouple 1 to communicate the signal; the third terminal 310 is connected to the third wire 42. The output terminal point of the controller, and the conductive coil 21 of the solenoid valve 2 is connected through the b interface end 31 to connect the signal; the small wire 43 connected to the fourth terminal 311 is the output terminal point of the electronic controller, and the described The auxiliary coil 23 of the solenoid valve 2 is connected through the b interface port 31 to communicate with the signal; both the C wire 42 and the D wire 43 are connected to the electronic controller.

Please refer to Figure 3 and Figure 4, and refer to Figure 2 together. In the utility model, a wire can be externally connected to the first wire 40 connected between the thermocouple 1 and the electromagnetic valve 2. At this time, the first wire 40 is connected with the metal sheet, and is connected with the conductive coil 21 and the auxiliary coil. 23 ground terminals are commonly grounded, the c-interface end 34 of the conductive coil 21 and the d-interface end 35 of the auxiliary coil 23 are connected to the common joint 50, and the c-interface end 34 of the solenoid valve 2 is connected to the thermocouple 1 is connected with the first contact 500 and the second wire 41, and the d interface end 35 of the solenoid valve 2 is connected with the electronic controller through the second contact 501 and the D wire 43.

Fig. 3 is the second embodiment schematic diagram of the utility model thermocouple and electromagnetic valve, as shown in Fig. 3, on the random section of second lead wire 41, set up auxiliary connection 44 with connection clip 5, the auxiliary connection 44 Function is equivalent to described third lead wire 42; Fig. 4 is the third embodiment schematic diagram of the utility model thermocouple and electromagnetic valve, as shown in Fig. The function of the wiring 44 ′ is also equivalent to that of the acrylic wire 42 ; therefore, the above-mentioned second embodiment and third embodiment can both achieve the control function achieved by the present invention.

Please refer to Figure 5 and refer to Figure 3. As shown in the figure, when using the gas stove A that is not equipped with the utility model, the user can start the gas switch by pressing and turning to achieve the gas pipe described in step B. The gas circuit and the ignition device are in the open state; when the gas switch is turned on, the thimble device inside the gas stove will be operated in step C at the same time, and the valve stem 20 in the solenoid valve 2 will be pressed against the valve plug 201 to make the solenoid valve 2 is opened, and then the gas pipeline is turned on, so that the gas can be output; at the same time, when the gas switch is pressed and turned, the ignition device of the gas stove is also activated, and the gas transmitted to the burner is ignited as described in step D. Combustion action; when the gas is ignited as described in step E, the thermocouple 1 installed on the burner head starts to be heated, so that the thermocouple 1 is as described in step F, and the thermocouple 1 senses the combustion heat of the gas, converts heat energy into electric energy, and Generate an electrical signal and input it to the conductive coil 21 of the solenoid valve 2 to excite the iron core 22 in the solenoid valve 2, so that the solenoid valve 2 will generate a continuous adsorption state, and maintain the valve position of the solenoid valve 2 from returning to cover the gas pipeline, so that the steps The gas pipeline of G is in a conduction state, and the gas is continuously sent to the burner to carry out the combustion action described in step H until the gas switch is turned off.

However, in actual operation, the following situations often occur: when the stove is first ignited, because the thermocouple 1 does not have enough time to preheat, it cannot sense enough heat energy in time and correspond to enough electrical signals, so it cannot detect the electromagnetic The iron core 22 in the valve 2 is excited to generate enough magnetic force, so that the valve stem 20 pressed against the solenoid valve 2 through the gas switch cannot be attracted by the excitation. Therefore, when the user releases the gas switch, the valve stem 20 is connected The valve plug 201 that moves will reset, and cover the gas pipeline again and block the gas output.

Through the setting of the utility model, the ignition detector J can be used to detect the ignition of the burner in the step D by using induction or micro-motion detection. The ignition detector J is connected with the electronic controller I, When the gas switch is turned on, the ignition detector J will immediately trigger the electronic controller 1 to generate an electrical signal, and the electrical signal is input to point x through the third wire 42, which is the c interface of the conductive coil 21 of the solenoid valve 2 terminal 34, and is connected with thermocouple 1 and electronic controller 1, so that solenoid valve 2 is excited and adsorbed to open the valve of solenoid valve 2, keep the gas pipeline open, and continuously provide gas for combustion and heating; ignition timing adsorption device M Connected to the electronic controller 1, the electrical signal sent by the electronic controller 1 can be automatically cut off after a few seconds to save power, and at this time, the thermocouple 1 has enough heat energy to complete the thermoelectric conversion, so that the solenoid valve 2 remains adsorbed.

The electronic controller I can also be connected to the timing device K, and the timing device K is started at the same time when the gas burner starts to be ignited for use. Once the set time arrives, the electronic controller I will be triggered to make the electronic controller I output Electric signal, through D lead wire 43 to y point, described y point is the d interface end 35 of the auxiliary coil 23 of electromagnetic valve 2, and is connected with electronic controller 1, because conductive coil 21 and auxiliary coil 23 are excited separately When the electrical characteristics are reversed, the magnetic field inside the solenoid valve 2 that was originally in an adsorption state is offset and destroyed, causing the solenoid valve 2 to return to cover the gas pipeline, block the gas supply, and stop the gas stove from burning and heating.

The electronic controller I can also be connected to the dry-burning detector L. When the gas stove is dry-burned due to negligence in operation, the electronic controller I is detected and triggered by the dry-burning detector L, and the electric wire 43 is connected to the gas stove. The electric signal is transmitted to the y point, and then the magnetic field in the electromagnetic valve 2 is offset and destroyed, so that the gas pipeline is blocked and the supply is blocked, so as to stop the continuous heating of the gas stove, thereby achieving the benefit of improving the safety of the gas stove.

The various control functions set by the aforementioned electronic controller 1 can be implemented independently or in combination, and the user can choose by himself according to his use requirements, thereby obtaining a safe and convenient gas stove.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model.

Claims (11)

1. A safety device for a gas stove, mainly comprising: a thermocouple installed at the gas burning hole of the burner inside the gas stove; a solenoid valve connected with the thermocouple by a wire and arranged on the gas switch of the gas stove , there is an electromagnet with a conductive coil wound on the iron core in the solenoid valve, which is characterized in that: An auxiliary coil is added on the iron core wound with a conductive coil in the electromagnetic valve, so that the electrical characteristics of the two coils are opposite when they are respectively excited; and the electromagnetic valve is provided with an interface end, and the electromagnetic valve is connected to the thermocouple and The electronic controller is electrically connected, so that the solenoid valve is actuated by the electrical signal of the thermocouple and the electronic controller. 2 . The safety device for gas stoves according to claim 1 , wherein the winding directions of the conductive coil and the auxiliary coil are opposite. 3. The safety device for gas stoves according to claim 1, characterized in that the excitation magnetism of the conductive coil is opposite to that of the auxiliary coil. 4. The gas stove safety device according to claim 1, wherein the control power supply of the electronic controller is common anode grounding. 5. The gas stove safety device according to claim 1, characterized in that, the control power supply of the electronic controller is common cathode grounding. 6. The gas stove safety device according to claim 1, wherein the conductive coil of the solenoid valve is provided with an interface end, one end of the conductive coil is grounded, and the other end is connected to the interface end of the solenoid valve, and the electronic controller An electrical signal can be output to the conductive coil. 7. The gas stove safety device according to claim 1, wherein the auxiliary coil of the solenoid valve is provided with an interface end, one end of the auxiliary coil is grounded, and the other end is connected to the interface end of the electromagnetic valve, and the electronic controller An electrical signal may be output to the auxiliary coil. 8. The gas stove safety device according to claim 1, wherein the electronic controller can be connected to an ignition detector. 9. The gas stove safety device according to claim 1, characterized in that the electronic controller can be connected to a timing device. 10. The safety device for gas stoves according to claim 1, wherein the electronic controller can be connected to a dry-burning detector. 11. The gas stove safety device according to claim 1, characterized in that the electronic controller can be connected to an ignition timing adsorption device.

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