Temperature control protection gas stove

Abstract

The utility model discloses a temperature control protection gas stove which comprises a gas valve body, a burner, a flame induction needle, a stove shell and a normally closed temperature control switch, an electromagnetic valve for controlling on-off of gas is arranged in front of the gas valve body, a wire of the flame induction needle is connected with the electromagnetic valve, and the temperature control switch is connected with the wire of the flame induction needle in series. The temperature sensing head of the temperature control switch senses the temperature change of the stove shell below the combustor or the head of the combustor, when the sensed temperature is close to the set temperature, the normally-closed temperature control switch is automatically switched off, and the overtemperature protection functions of dry burning prevention, combustor fire leakage prevention and the like are simply achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stoves, in particular to a gas stove with over-temperature protection. Background Art

[0002] Currently, all domestic gas stoves are equipped with an accidental flameout protection device, a safety feature that automatically shuts off the gas supply if the flame is accidentally extinguished by external factors (such as wind or hot water), preventing gas leaks and potential fires. Some stoves also feature a burn-dry protection feature, implemented through a series of temperature sensors and control systems. This prevents overheating and potential fires caused by evaporation of water from the pot. These devices often use a temperature sensor in contact with the pot bottom, which is complex and expensive. Temperature measurement accuracy is affected by the flame and operating environment. They require a central hole for the burner installation, preventing the use of traditional flame caps. This affects the overall appearance of the burner and stove, making it difficult to clean the stove panel or serving tray. Furthermore, they cannot detect burner placement, and improperly placed flame caps can lead to leaks and abnormal combustion, resulting in burner failure. Summary of the Invention

[0003] The purpose of the utility model is to solve the deficiencies in the prior art and provide a temperature-controlled gas stove that not only has an accidental flameout protection function, but also can simply implement over-temperature protection functions such as dry burning prevention and burner leakage prevention.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a temperature-controlled gas stove, including a gas valve body, a burner, a flame sensing needle, and a stove shell. A solenoid valve for controlling the on and off of gas is provided in front of the gas valve body. The wire of the flame sensing needle is connected to the solenoid valve. It also includes a normally closed temperature control switch, which is connected in series with the wire of the flame sensing needle. The temperature sensing head of the temperature control switch senses the temperature changes of the stove shell or the burner head below the burner. When the sensed temperature approaches the set temperature, the normally closed temperature control switch automatically disconnects and closes the solenoid valve, thereby automatically cutting off the gas supply and turning off the gas stove.

[0005] Furthermore, the flame sensing needle is a thermocouple sensing needle.

[0006] Furthermore, the flame sensing needle is an ion sensing needle, and further includes a controller, the controller is connected to the wire of the ion sensing needle and the solenoid valve, and the temperature control switch is connected in series before or after the controller.

[0007] Furthermore, the temperature sensing head of the temperature control switch is upwardly in close contact with the panel of the stove housing or the bottom of the liquid tray.

[0008] Furthermore, the temperature sensing head of the temperature control switch extends upward from the panel or liquid receiving tray of the stove housing.

[0009] Furthermore, the temperature sensing head of the temperature control switch is closely attached to the burner head upward or extends upward from the bottom of the burner head.

[0010] The utility model has a simple structure. A temperature control switch is connected in series on the basis of the existing stove flameout protection device. The temperature control switch has a lower cost than the temperature touch sensor of the existing anti-dry burning system. The temperature sensing head of the temperature control switch is located below the burner and has more functions than the traditional temperature sensor for measuring the bottom temperature of the pot, such as auxiliary prevention of dry burning, prevention of burner leakage and even prevention of backfire. It is easy to install, is not picky about burners, does not increase the difficulty of cleaning the stove, and the temperature measurement accuracy is less affected by the flame and the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 2 is a schematic diagram of embodiment 1 of a temperature control protection gas stove.

[0012] Figure 2 2 is a schematic diagram of a temperature control protection gas stove embodiment 2.

[0013] Figure 3 2 is a schematic diagram of embodiment 3 of a temperature control protection gas stove. DETAILED DESCRIPTION

[0014] The present invention will be described in further detail below with reference to the accompanying drawings.

[0015] The temperature control protection gas stove includes a gas valve body 2, a burner 3, a stove shell, and a flame sensor needle 5. The gas valve body 2 is a plug valve, and the fire is turned on and off and the fire power is adjusted by turning the knob in normal use. The stove housing is a relatively enclosed space formed by the stove panel 4 and the stove bottom shell. The burner 3 is mounted above or as a whole above the stove panel 4, with a liquid pan 41 positioned below it. A solenoid valve 1 is located in front of the gas valve body 2 to control the on / off flow of the gas. The gas valve body 2 supplies gas to the burner 3 via a pipeline. The burner 3 typically includes a main burner located on the outer ring and a low-fire burner located in the center. A flame sensor 5 is located near the low-fire burner, close to the fire hole. A wire 51 from the flame sensor 5 connects to the solenoid valve 1. A normally closed temperature control switch 6 is also included. The temperature control switch 6 is connected in series to the wire 51 of the flame sensor 5. The temperature sensor of the temperature control switch 6 senses temperature changes in the stove housing or burner head in the area below the burner 3. When the sensed temperature approaches the set operating temperature, the normally closed temperature control switch 6 automatically opens, closing the solenoid valve 1, thereby automatically cutting off the gas supply and shutting down the gas stove. When the temperature sensed by the temperature sensor drops, the temperature control switch 6 automatically closes, allowing the gas stove to continue to operate normally.

[0016] Example 1, temperature control protection gas stove, such as Figure 1As shown, the flame sensor needle 5 is a thermocouple sensor, a temperature differential sensor. The temperature sensor head of the normally closed temperature control switch 6 is in close contact with the lower bottom of the cooktop panel 4, located below the burner 3, to sense changes in the cooktop temperature. The two connecting terminals of the temperature control switch 6 are connected to the thermocouple sensor wire 51, and the ground wire 52 is connected to the thermocouple sensor housing and the gas valve 2, respectively. The temperature control switch 6 is set to an over-temperature operating temperature of 140°C with a temperature accuracy of ±5°C. During normal cooking, the temperature measurement area normally does not exceed 130°C. When an abnormal operating condition such as dry burning, burner leakage, or flashback occurs, the temperature of the temperature measurement area continues to rise, approaching or exceeding the set over-temperature operating temperature of the temperature control switch 6. The bimetallic strip built into the temperature control switch 6 deforms with the temperature rise, causing the contacts to open. The potential generated by the heat on the thermocouple sensor needle cannot communicate with the solenoid valve 1, which closes, cutting off the gas flow to the gas valve body 2, and the cooktop burner 3 is turned off, thus achieving auxiliary dry burning, leaking, or flashback protection. Since the temperature and temperature rise distribution of the cooker panel 4 are different, the set working temperature of the temperature control switch 6 is selected according to the different installation positions of the temperature sensing head.

[0017] Example 2, temperature control protection gas stove, such as Figure 2 As shown, the difference from Example 1 is that a liquid pan 41 is provided on the cooktop, located below the burner 3, and the temperature sensing head of the temperature control switch 6 extends upward from the liquid pan 41. Over long-term use, the temperature sensing head of the temperature control switch 6 may be covered by cooking liquid, debris, etc., affecting temperature sensing accuracy. Therefore, a solution in which the temperature sensing head of the temperature control switch 6 is facing upward and closely against the cooktop panel or the bottom of the liquid pan is preferred.

[0018] Example 3, temperature control protection gas stove, such as Figure 3 As shown, the difference compared to Example 1 is that the flame sensing needle 5 is an ion sensing needle. By utilizing the photoelectric properties of the flame, the temperature sensing head of the temperature control switch 6 is tightly attached to the bottom end of the burner head. It also includes a controller 7 for driving the solenoid valve 1. The controller 7 connects the wire 51 of the ion sensing needle and the solenoid valve 1. The temperature control switch 6 is connected in series before or after the controller 7. As shown in the figure, the temperature control switch 6 is connected in series before the controller 7.

Claims

1. A temperature-controlled gas stove, comprising a gas valve body, a burner, a flame sensor needle, and a stove housing. A solenoid valve for controlling the on-off of the gas is provided in front of the gas valve body. The wire of the flame sensor needle is connected to the solenoid valve. It also includes a normally closed temperature control switch, which is connected in series to the wire of the flame sensing needle. The temperature sensing head of the temperature control switch senses the temperature changes of the stove shell or the burner head below the burner. When the sensed temperature approaches the set temperature, the normally closed temperature control switch automatically disconnects.

2. The temperature control protection gas stove according to claim 1, characterized in that The flame sensing needle is a thermocouple sensing needle.

3. The temperature control protection gas stove according to claim 1, characterized in that The flame sensing needle is an ion sensing needle and further comprises a controller, wherein the controller is connected to the wire of the ion sensing needle and the electromagnetic valve, and the temperature control switch is connected in series before or after the controller.

4. The temperature-controlled gas stove according to claim 1, characterized in that The temperature sensing head of the temperature control switch is upwardly pressed against the panel of the stove shell or the bottom of the liquid tray.

5. The temperature-controlled gas stove according to claim 1, characterized in that The temperature sensing head of the temperature control switch extends upwardly from the panel or liquid receiving tray of the stove housing.

6. The temperature-controlled gas stove according to claim 1, characterized in that The temperature sensing head of the temperature control switch is closely attached to the burner head or extends upward from the bottom of the burner head.

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