CN201836935U - Gas kitchen range with temper protective device - Google Patents

Abstract

The utility model relates to a gas kitchen range with a temper protective device, which comprises a controller, a combustor, a gas inlet pipe connected with the combustor, and a switch assembly arranged on the gas inlet pipe, wherein the switch assembly comprises an electromagnetic valve and a switch linked with the electromagnetic valve, the electromagnetic valve is connected with the controller, the electromagnetic valve is connected with a thermocouple connected with the combustor, the combustor is provided with a thermistor, and the thermistor is connected with the controller. According to the gas kitchen range with the temper protective device, since the thermistor is connected with the combustor, the gas kitchen range with the temper protective device has a simple structure, is convenient to install, has reliable temper actions, and can automatically cut off a gas source when the kitchen range tempers.

Description

A gas cooker with a backfire protection device

technical field

The utility model relates to a gas cooker, in particular to a gas cooker with a backfire protection device. the

Background technique

During the combustion process of household gas stoves, due to the change of gas composition and gas pressure, tempering phenomenon often occurs. The tempering of the burner will damage the gas stove, resulting in burnt burner, glass panel, ceramic panel burst or stainless steel Accidents such as blackening of the panel, damage to internal wiring, and damage to control devices not only bring property losses but also endanger the safety of users. the

In order to reduce the damage of the device and ensure that the gas cooker is in a closed state when the gas cooker is backfired, the name is "a gas cooker with a backfire protection device", and the Chinese utility model patent with the authorized announcement number CN2833376Y discloses a Gas hobs with flashback protection. It includes a furnace head and an ignition controller. The ignition controller is connected with a tempering protection device composed of a thermostat and a solenoid valve. On the gas pipeline, the ignition controller is connected with the temperature controller and the solenoid valve to form a closed loop. This utility model uses a thermostat to control the solenoid valve, thereby controlling the opening and closing of the gas supply channel of the gas cooker, but the thermostat is installed between the ejector tube and the mixing chamber, and the reaction time of the thermostat is relatively long. It takes a long time for the flashback to occur before the solenoid valve operates, and it cannot effectively detect whether the flashback has occurred in the mixing chamber. The thermostat is bulky and inconvenient to install. The controller is relatively close to the burner and is easily damaged. the

Utility model content:

The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a gas burner with a tempering protection device that has a simple structure, convenient installation, reliable tempering protection action, and can automatically cut off the gas source when the cooker is tempering. stove. the

According to the utility model, a gas cooker with a backfire protection device is proposed, which includes a controller, a burner, an air intake pipe connected to the burner, and a switch assembly installed on the air intake pipe. The switch assembly includes an electromagnetic valve and a switch linked with the solenoid valve, the solenoid valve is connected with the controller, and the solenoid valve is connected with a thermocouple connected with the burner, and the burner is provided with a thermistor , the thermistor is connected to the controller. the

The gas cooker provided with the tempering protection device according to the utility model also has the following additional technical features:

The solenoid valve is a double-coil solenoid valve, including a main coil and an auxiliary coil, the main coil is connected to the thermocouple, and the auxiliary coil is connected to the controller. the

The burner includes a mixing chamber and an injection pipe communicating with the mixing chamber, and the thermistor is installed on the outer wall of the mixing chamber. the

The burner includes a mixing chamber and an injection pipe communicating with the mixing chamber, and the thermistor is installed on the outer wall of the injection pipe. the

The solenoid valve is a self-priming valve. the

The controller is installed on the solenoid valve and is integrally structured with the solenoid valve. the

The thermocouple extends into the burner. the

Compared with the prior art, the gas cooker provided with the tempering protection device according to the utility model has at least the following advantages:

First of all, according to the gas cooker with a tempering protection device provided by the utility model, it is connected with the burner through a thermistor. secondly, adopt the detection circuit of the cooperation of thermocouple and thermistor, make the detection of the whole detection circuit more reliable, improve the sensitivity of detection backfire; The thermocouple is connected and the controller is connected, and the control of the action of the solenoid valve is completed through the way of forward and reverse currents, so that the gas stove is more safe and reliable in use. the

Additional aspects and advantages of the utility model will be partly given in the following description, and part will become more obvious from the following description, or can be understood through the practice of the utility model. the

Description of drawings

The above-mentioned and other aspects and advantages of the present utility model will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural view of a gas cooker with a tempering protection device provided according to the utility model;

Fig. 2 is a schematic structural diagram of the switch assembly provided by the present invention. the

Detailed ways:

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments described below by referring to the accompanying drawings are used to explain the present utility model, and the embodiments are exemplary, but not construed as limitations of the present utility model. the

Referring to Fig. 1 and Fig. 2, a gas cooker with a backfire protection device provided according to the present invention includes a controller 1, a burner 2, an air intake pipe 3 connected to the burner 2, and installed on the The switch assembly 4 on the intake pipe 3, the switch assembly 4 includes a solenoid valve 5 and a switch 6 linked with the solenoid valve 5, the solenoid valve 5 is connected to the controller 1, and the The solenoid valve 5 is connected with a thermocouple 7 connected with the burner 2 , and the burner 2 is provided with a thermistor 8 connected with the controller 1 . For example, the solenoid valve 5 is a double-coil solenoid valve, including a main coil 51 and an auxiliary coil 52 , the main coil 51 is connected to the thermocouple 7 , and the auxiliary coil 52 is connected to the controller 1 . When the burner 2 backfires, the resistance value of the thermistor 8 changes. When the resistance value reaches the threshold value set by the circuit in the controller 1, the controller 1 outputs a feedback to the auxiliary coil 52 of the solenoid valve 5. To counteract the electromagnetic force generated by the forward current of the thermocouple 7 in the main coil 51, automatically close the solenoid valve 5, use the switch action to cut off the gas passage, and realize the protection function. For example, the solenoid valve 5 is a self-priming valve. The thermistor 8 is connected to the burner 2, which has a simple structure, convenient installation, reliable tempering protection action, and can automatically cut off the gas source when the cooker is tempered. In addition, the combined detection circuit of thermocouple 7 and thermistor 8 makes the detection of the entire detection circuit more reliable and improves the sensitivity of detecting tempering. And the solenoid valve 5 is a double-coil solenoid valve, which is connected with the thermocouple 7 and the controller 1 respectively, and completes the control of the action of the solenoid valve 5 by means of forward and reverse currents, so that the gas The stove is safer and more reliable in use. the

Referring to Fig. 1, according to the above-mentioned embodiment of the present utility model, the burner 2 includes a mixing chamber 21 and an injection pipe 22 communicating with the mixing chamber 21, and the thermistor 8 can be installed in the mixing chamber 21 on the outer wall. Or the thermistor 8 can be installed on the outer wall of the injection tube 22 . Installed on the outer wall of the mixing chamber 21 and the outer wall of the injection pipe 22, the thermistor 8 detects the temperature of the burner 2 more sensitively. Once the temperature of the burner 2 rises rapidly due to tempering, the thermistor The resistance value of the resistor 8 changes rapidly, which makes the whole tempering detection system more sensitive. the

Referring to Fig. 1 and Fig. 2, according to the embodiment of the present utility model, the controller 1 is installed on the solenoid valve 5, and is integrally structured with the solenoid valve 5. In this way, the usage of the circuit 9 inside the cooker can be reduced as much as possible, the chance of contacting the circuit 9 with the burner 2 is reduced, and the damage caused by the too close distance between the circuit 9 and the burner 2 is avoided. the

The thermocouple 7 extends into the burner and contacts or approaches the flame of the burner 2 during combustion. The thermocouple 7 absorbs heat to generate a microcurrent, which is connected with the main coil 51 of the solenoid valve 5, so that the solenoid valve is in the In the power supply state, the solenoid valve 5 controls the switch so that the intake pipe 3 is in the open state. When the burner 2 flashes back, it will cause the resistance value of the thermistor 8 to change. When the resistance value reaches the threshold value set by the circuit in the controller 1 At this time, the controller 1 outputs a reverse current to the auxiliary coil 52 of the solenoid valve 5 to offset the electromagnetic force generated by the forward current of the thermocouple 7 in the main coil 51, automatically close the solenoid valve 5, and use the switch action to cut off the gas passage. Realize the protection function. the

Claims (7)

1. gas kitchen ranges with tempering protective device; comprise controller, burner, the air inlet pipe that is connected with described burner, be installed in the switch assembly on the described air inlet pipe; described switch assembly comprises that magnetic valve reaches and the switch of described magnetic valve interlock; it is characterized in that: described magnetic valve is connected with described controller; and described magnetic valve is connected with the thermocouple that is connected with described burner; described burner is provided with thermistor, and described thermistor is connected with described controller.

2. the gas kitchen ranges with tempering protective device according to claim 1; it is characterized in that: described magnetic valve is the dual coil electromagnetic valve; comprise main coil and ancillary coil, described main coil is connected with described thermocouple, and described ancillary coil is connected with described controller.

3. the gas kitchen ranges with tempering protective device according to claim 1 and 2 is characterized in that: described burner comprises hybrid chamber and the induction tunnel that is communicated with described hybrid chamber, and described thermistor is installed on the outer wall of described hybrid chamber.

4. the gas kitchen ranges with tempering protective device according to claim 1 and 2 is characterized in that: described burner comprises hybrid chamber and the induction tunnel that is communicated with described hybrid chamber, and described thermistor is installed on the outer wall of described induction tunnel.

5. the gas kitchen ranges with tempering protective device according to claim 1 and 2 is characterized in that: described magnetic valve is a self-priming valve.

6. the gas kitchen ranges with tempering protective device according to claim 1 and 2 is characterized in that: described controller is installed on the described magnetic valve, is structure as a whole with described magnetic valve.

7. the gas kitchen ranges with tempering protective device according to claim 1 and 2 is characterized in that: described thermocouple stretches in the described burner.

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