Flameout protection device of gas stove

Abstract

The utility model relates to the technical field of gas stoves, and discloses a flame-out protection device of a gas stove, which is characterized in that a groove is arranged on the top surface of an outer ring body of a central fire cover, a flame-out protector is arranged in the groove, the flame-out protector is arranged in the central fire cover, the whole flame-out protection process occurs in the groove of the central fire cover, and a protection cover plate is arranged on the groove. The flameout protector cannot be touched or collided and cannot be covered by kitchen waste, and the flameout protector is relatively stable; the flameout protector is composed of a metal pole plate and a metal expansion wire with one end fixed to the metal pole plate, the metal expansion wire is arranged in the groove, the on-off state of a circuit is controlled through heating expansion and cold shrinkage of metal expansion, and then flameout protection is achieved by controlling opening and closing of the electric valve body through the controller. And equivalently, probes are arranged along a circle of the central fire cover, so that when part of the fire holes are blocked, the operation of the whole flameout protection is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of gas stove technology, specifically to a flameout protection device for a gas stove. Background Technology

[0002] There are generally two types of flameout protection for household gas stoves: thermoelectric and ionization. The difference lies in the type of protection: thermoelectric uses a thermocouple probe, while ionization uses an ionization sensor. Both types have probes externally positioned at the burner holes. The probes detect the temperature of the burner holes and transmit the resulting electrical signal to the corresponding valve body for a response. However, after-sales issues for these two types of gas stoves mostly fall into the following categories:

[0003] (1) The probe is externally placed, which causes it to be covered by debris. The heat of the flame is absorbed by the debris and cannot be transferred to the internal probe in time, so it cannot respond to the relevant actions.

[0004] (2) External probes are easily damaged by touch or impact, and cannot sense temperature or transmit signals.

[0005] (3) When part of the flame hole at the probe is blocked, there is no flame to burn the probe and it cannot respond to related actions. Utility Model Content

[0006] The purpose of this invention is to provide a flameout protection device for a gas stove, so as to solve the problem mentioned in the background art where the probe is externally wrapped or damaged by debris and cannot transmit signals.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A flameout protection device for a gas stove, the gas stove comprising: a burner, the burner including a central burner cap, an outer ring body provided on the central burner cap, and flame holes provided on the side of the outer ring body, characterized in that: a groove is provided on the top surface of the outer ring body, and a flameout protector is provided in the groove, the flameout protector comprising a metal electrode plate and a metal expansion wire, the metal electrode plate being fixedly connected in the groove, the metal expansion wire being installed in the groove, one end connected to the metal electrode plate being a fixed end, and the other end being a free end that does not contact the metal electrode plate at room temperature, the metal expansion wire being a metal material with a high coefficient of thermal expansion and good thermal conductivity.

[0009] Furthermore, the gas stove also includes: an ejector tube, a signal transmission system, an electric valve body, a controller, and a power supply. One end of the ejector tube is connected to the bottom of the burner, and the other end is connected to the electric valve body. The controller is connected to the metal electrode plate and the electric valve body through the signal transmission system. The electric valve body controls the opening and closing of the gas stove.

[0010] Furthermore, the free end of the metal expansion wire is provided with a metal contact, which is used to form a passage with the metal electrode plate after thermal expansion.

[0011] Furthermore, the metal electrode plate is embedded in the groove.

[0012] Furthermore, the fixed end of the metal expansion wire is welded to the metal electrode plate.

[0013] Furthermore, the signal transmission system includes a signal transmission line for signal transmission between the metal electrode plate, the controller, and the electric valve body.

[0014] Furthermore, the controller controls the opening and closing of the electric valve body based on the on / off signal of the metal expansion wire fed back from the metal electrode plate.

[0015] Furthermore, the controller is electrically connected to the power supply.

[0016] Furthermore, the metal expansion wire is made of aluminum alloy.

[0017] Furthermore, the central flame cap is coated with high-temperature insulating varnish and has a protective cover plate on it, which houses the flameout protector.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] By providing a groove on the top surface of the outer ring, and placing a flameout protector inside the groove, the entire flameout protection process occurs within the groove of the central flame cap. A protective cover is provided on top of the groove, ensuring that the flameout protector is not covered by kitchen waste or debris, nor is it subject to touch, impact, or collision. This design is relatively stable and solves two problems: the external probe is covered by debris, causing the flame heat to be absorbed by the debris and unable to be transferred to the internal probe in time, thus preventing it from responding to related actions; and the external probe is easily damaged by touch or impact, resulting in the inability to sense temperature or transmit signals.

[0020] The flameout protector consists of a metal electrode plate and a metal expansion wire fixed to it at one end. Since the metal expansion wire is placed in a groove, it controls the circuit opening and closing by expanding when heated and contracting when cooled. In turn, the controller controls the opening and closing of the electric valve body to achieve flameout protection. It is equivalent to having probes around the center burner cap. Therefore, when some burner holes are blocked, it will not affect the operation of the entire flameout protection. This solves the problem that when some burner holes at the probe are blocked, there is no flame to burn the probe and the relevant actions cannot be responded to. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of the gas stove of this utility model;

[0022] Figure 2 This is a schematic diagram of the flameout protection device for the gas stove of this utility model.

[0023] In the diagram: 100-burner, 110-center burner cap, 1100-outer ring body, 1101-burner hole, 1102-groove, 120-flameout protector, 121-metal electrode plate, 122-metal expansion wire, 1221-fixed end, 1222-free end, 200-ejector tube, 300-electric valve body, 400-controller, 500-signal transmission system, 510-signal transmission line. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-2 As shown, a flameout protection device for a gas stove is disclosed. The gas stove includes a burner 100, which includes a central burner cap 110. An outer ring 1100 is provided on the central burner cap 110, and flame holes 1101 are provided on the side of the outer ring 1100. The outer ring 1100 is characterized in that a groove 1102 is provided on the top surface of the outer ring 1100, and a flameout protector 120 is provided in the groove 1102. The flameout protector 120 includes a metal electrode plate 121 and a metal expansion wire 122. The metal electrode plate 121 is fixedly connected in the groove 1102, and the metal expansion wire 122 is installed in the groove 1102. One end connected to the metal electrode plate 121 is a fixed end 1221, and the other end is a free end 1222. At room temperature, the free end 1222 does not contact the metal electrode plate 121. The metal expansion wire 122 is a metal material with a large coefficient of thermal expansion and good thermal conductivity.

[0026] like Figure 1 As shown, the gas stove also includes: a burner, an injector tube 200, a signal transmission system 500, an electric valve body 300, a controller 400, and a power supply (not shown in the figure). One end of the injector tube 200 is connected to the bottom of the burner 100, and the other end is connected to the electric valve body 300. The controller 400 is connected to the metal electrode plate 121 and the electric valve body 300 through the signal transmission system 500. The electric valve body 300 controls the opening and closing of the gas stove.

[0027] In actual implementation, the free end 1222 of the metal expansion wire 122 is provided with a metal contact. After the metal expansion wire 122 thermally expands due to temperature rise, the metal contact contacts the metal electrode plate 121 to form a passage.

[0028] like Figure 2 As shown, the metal electrode plate 121 is embedded in the groove 1102.

[0029] In some embodiments, the fixed end 1221 of the metal expansion wire 122 is welded to the metal electrode plate 121.

[0030] In actual implementation, the signal transmission system 500 includes a signal transmission line 510, which is used for signal transmission between the metal electrode plate 121, the controller 400 and the electric valve body 300.

[0031] In actual implementation, the controller 400 controls the opening and closing of the electric valve body 300 based on the on / off signal of the metal expansion wire 122 fed back from the metal electrode plate 121.

[0032] In actual implementation, the controller 400 is electrically connected to the power supply.

[0033] In some embodiments, the metal expansion wire 122 is made of aluminum alloy.

[0034] In actual implementation, the center flame cover 110 is coated with high-temperature insulating paint and has a protective cover plate on it, which houses the flameout protector.

[0035] The working process of the flameout protection device for the gas stove of this utility model is as follows:

[0036] Step 1: The gas stove is ignited, and the gas at the fire hole 1101 of the central burner cap 110 enters the combustion state. The flame temperature radiates to the metal expansion wire 122 in the groove 1102 of the central burner cap 110.

[0037] Step 2: After receiving heat, the metal expansion wire 122 expands and extends. Since the fixed end 1221 is fixed to the metal electrode plate 121, the metal expansion wire 122 cannot expand and extend to that side. Therefore, the metal expansion wire 122 expands and extends to its free end 1222 and then contacts the metal electrode plate 121. At this time, the circuit is completed.

[0038] Step 3: When the controller 400 receives a signal that the metal expansion wire 122 and the metal electrode plate 121 are connected, it controls the electric valve body 300 to remain in the open state, and the gas stove remains in the on state.

[0039] Step 4: When the flame is accidentally extinguished or turned off, the flame at the fire hole 1101 stops burning, the temperature of the metal expansion wire 122 decreases and its length decreases, the free end 1222 disconnects from the metal electrode plate 121, forming an open circuit, the controller 400 receives the open circuit signal and controls the electric valve body 300 to close the valve, at which time the gas stove is turned off.

[0040] This invention utilizes a metal material with a large coefficient of thermal expansion and good thermal conductivity, such as aluminum alloy, which has a coefficient of thermal expansion of 20×10-6 / ℃. This means that an aluminum alloy material 1m long in any direction will expand by 2mm when its temperature increases by 100℃. This material is made into a metal expansion wire 122 and installed in the groove 1102 of the central flame cap 110. When the flame on the flame hole 1101 of the central flame cap 110 burns, the metal expansion wire 122 expands due to heat and closes with the metal electrode plate 121, and the electric valve body 300 is continuously opened when energized. When the flame goes out, the temperature of the metal expansion wire 122 drops and it separates from the closed metal electrode plate 121, and the electric valve body 300 is automatically de-energized and closed.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flameout protection device for a gas stove, the gas stove comprising: A burner, comprising a central flame cap, an outer ring body on which an outer ring body has flame holes on its side, characterized in that: a groove is provided on the top surface of the outer ring body, and a flameout protector is provided in the groove, the flameout protector comprising a metal electrode plate and a metal expansion wire, the metal electrode plate being fixedly connected in the groove, the metal expansion wire being installed in the groove, one end of the metal expansion wire being a fixed end connected to the metal electrode plate, and the other end being a free end that does not contact the metal electrode plate at room temperature, the metal expansion wire being a metal material with a high coefficient of thermal expansion and good thermal conductivity.

2. The flameout protection device for a gas stove according to claim 1, characterized in that: The gas stove also includes: an ejector tube, a signal transmission system, an electric valve body, a controller, and a power supply. One end of the ejector tube is connected to the bottom of the burner, and the other end is connected to the electric valve body. The controller is connected to the metal electrode plate and the electric valve body through the signal transmission system. The electric valve body controls the opening and closing of the gas stove.

3. The flameout protection device for a gas stove according to claim 1, characterized in that: The free end of the metal expansion wire is provided with a metal contact, which is used to form a passage with the metal electrode plate after thermal expansion.

4. The flameout protection device for a gas stove according to claim 1, characterized in that: The metal electrode plate is embedded in the groove.

5. The flameout protection device for a gas stove according to claim 4, characterized in that: The fixed end of the metal expansion wire is welded to the metal electrode plate.

6. The flameout protection device for a gas stove according to claim 2, characterized in that: The signal transmission system includes a signal transmission line, which is used for signal transmission between the metal electrode plate, the controller, and the electric valve body.

7. The flameout protection device for a gas stove according to claim 6, characterized in that: The controller controls the opening and closing of the electric valve body based on the on / off signal of the metal expansion wire fed back from the metal electrode plate.

8. The flameout protection device for a gas stove according to claim 2, characterized in that: The controller is electrically connected to the power supply.

9. The flameout protection device for a gas stove according to claim 1, characterized in that: The metal expansion wire is made of aluminum alloy.

10. The flameout protection device for a gas stove according to claim 1, characterized in that: The central flame cap is coated with high-temperature insulating varnish and has a protective cover plate on it, which houses the flameout protector.

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