Stove flame detection structure

Abstract

The utility model discloses a stove flame detection structure, which comprises a burner, a flame detector and a flame detector, the control assembly comprises a control valve, a detection probe and a conductive probe, the control valve is used for controlling opening or closing of the combustor, and the control valve is provided with a grounding end; the detection probe and the conductive probe are arranged at the side part of the combustor and are spaced to form a detection interval; the detection probe is electrically connected with the control valve; the conductive probe is electrically connected with the grounding end of the control valve; the detection probe, the control valve and the conductive probe are used for being in a conducting state when flames exist in the detection interval; the detection probe, the control valve and the conductive probe are used for being in a non-conducting state when no flame exists in the detection interval; and the control valve controls the burner to be closed in a non-conducting state. According to the stove flame detection structure, the conductive probe can be directly grounded during flame detection, and interference in the detection process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to a flame detection structure of a stove. Background Art

[0002] The flame detection of the stove is the core data of the flameout protection function. The traditional knob gas stove uses a thermocouple to directly energize the solenoid valve on the gas path for linkage. The advantage of this solution is that it saves battery power when used on traditional knob stoves, and the control logic is simple;

[0003] When the stove becomes intelligent, all valves need to be controlled by a controller. For the flameout protection function, the controller needs to have an accurate and quantitative data (or range) input to determine whether the flame is out; that is, the unidirectional conductivity of the flame is used to detect the hydroxyl ions produced by the flame combustion for judgment; this technology has been widely used in closed combustion scenarios such as gas water heaters, gas heating furnaces, and gas boilers.

[0004] Cookers are open combustion and the burner structure may be assembled from a variety of metal materials (cast iron, die-cast aluminum, cast aluminum, brass), and the burner's gas distributor may be sprayed with high-temperature paint to ensure the appearance, which creates many interference factors for the ground loop of flame detection. Compared with closed combustion flame detection, the application of ion induction detection on cookers has problems such as unstable signals and poor consistency.

[0005] (1) Traditional gas water heaters are in a closed space, and there is no harsh environment of a gas stove (such as soup, vegetable leaves, etc.) that would cause interference, so the probe of the gas water heater can be grounded through the shell to form a large loop; (2) The surface of the gas distributor of the gas stove is sprayed with high-temperature paint for heat insulation; the presence of high-temperature paint makes direct grounding of the distributor unreliable. Utility Model Content

[0006] In order to overcome at least one of the defects of the prior art described above, the utility model provides a stove flame detection structure, which can directly ground a conductive probe during flame detection to reduce interference during the detection process.

[0007] The technical solution adopted by the utility model to solve the problem is:

[0008] A stove flame detection structure, comprising:

[0009] Burner;

[0010] A control assembly, the control assembly comprising a control valve, a detection probe and a conductive probe, the control valve is used to control the opening or closing of the burner, the control valve has a grounding terminal; the detection probe and the conductive probe are arranged on the side of the burner and are spaced to form a detection interval; the detection probe is electrically connected to the control valve; the conductive probe is electrically connected to the grounding terminal of the control valve;

[0011] The detection probe, the control valve and the conductive probe are used to be in a conductive state when there is a flame in the detection interval; the detection probe, the control valve and the conductive probe are used to be in a non-conductive state when there is no flame in the detection interval; the control valve controls the burner to be closed in the non-conductive state.

[0012] Furthermore, the control component includes a mounting bracket, the mounting bracket includes a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are arranged at intervals; the detection probe is inserted into the first mounting hole, and the conductive probe is inserted into the second mounting hole.

[0013] Furthermore, a probe of the detection probe extends out from a top end of the first mounting hole.

[0014] Furthermore, two ends of the conductive probe extend out from the top and bottom of the first mounting hole respectively.

[0015] Furthermore, the mounting bracket is provided with a first mounting column and a second mounting column which are spaced apart from each other, the first mounting hole passes through the first mounting column; and the second mounting hole passes through the second mounting column.

[0016] Furthermore, a connecting block is provided between the first mounting column and the second mounting column.

[0017] Furthermore, the burner includes a combustion seat and a fire cover assembly, the combustion seat is provided with a drainage pipe, and the drainage pipe is used to introduce the fuel gas to the fire cover assembly; the detection probe and the conductive probe are arranged on the side of the fire cover assembly.

[0018] Furthermore, the fire cover assembly includes an outer fire cover ring and an inner fire cover ring, the drainage pipe is used to guide the introduced fuel gas to the outer fire cover ring and the inner fire cover ring, the outer fire cover ring and the inner fire cover ring are sealed on the combustion seat; the outer fire cover ring is arranged around the outer periphery of the inner fire cover ring; the detection probe and the conductive probe are arranged between the outer fire cover ring and the inner fire cover ring.

[0019] In summary, the utility model has the following technical effects:

[0020] In this way, the grounding end of the control valve can form a large loop with the conductive probe instead of connecting to the ground of the burner or the shell of the gas stove, so it will not be affected by other structures. Therefore, when there is a flame, the conduction state is stable and the formed detection circuit is also stable. There is no flame in the detection interval between the detection probe and the conductive probe, so the detection probe and the conductive probe are no longer conductive. The detection probe, the control valve and the conductive probe are in a non-conductive state, and the detection circuit is disconnected, so a control signal can be generated. The control valve can be closed to the burner under the action of the control signal to prevent gas leakage, which is safer to use.

[0021] In addition, the detection circuit uses flames to form conductive particles to achieve a conductive state, so it can be disconnected immediately when there is no flame, so that the detection result is more accurate and the precision is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a partial structural schematic diagram of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the control component of the utility model.

[0025] Among them, the meanings of the figure numbers are as follows: 10, burner; 11, combustion seat; 111, gas guide groove; 12, outer fire cover ring; 13, inner fire cover ring; 14, drainage tube; 21, detection probe; 22, conductive probe; 23, first mounting column; 231, first mounting hole; 24, second mounting column; 241, second mounting hole; 25, connecting block; 26, mounting bracket. DETAILED DESCRIPTION

[0026] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] See also Figure 1 , Figure 2 as well as Figure 3 The utility model discloses a stove flame detection structure, including a burner 10 and a control component. The control component includes a control valve, a detection probe 21 and a conductive probe 22. The control valve is used to control the opening or closing of the burner 10. Of course, the control valve can be used to control the opening and closing of the gas pipeline to realize the opening or closing of the burner 10.

[0030] The control valve has a grounding terminal, and a detection probe 21 and a conductive probe 22 are disposed on the side of the burner 10, and a detection interval can be formed between the detection probe 21 and the conductive probe. The detection probe 21 is electrically connected to the control valve, and the conductive probe 22 is electrically connected to the grounding terminal of the control valve.

[0031] Specifically, when there is a flame in the detection interval, the detection probe 21, the control valve and the conductive probe 22 are in a conducting state to form a detection circuit. When there is no flame in the detection interval, the detection probe 21, the control valve and the conductive probe 22 are in a non-conducting state, and the detection circuit is disconnected. The control valve controls the burner 10 to be closed in the non-conducting state.

[0032] On the basis of the above structure, when the stove flame detection structure of the utility model is used, the burner 10 can be opened through the control valve during use, and the burner 10 will generate a flame when it burns, and the detection probe 21 and the conductive probe 22 are arranged on the side of the burner 10, specifically on the inside or outside of the burner 10, so that the flame generated will be located in the detection interval between the detection probe 21 and the conductive probe 22, so that the high temperature in the flame can ionize the gas molecules to form charged ions and electrons, and these charged particles can move and form current, thereby making the detection probe 21 and the conductive probe 22 conductive. At this time, the detection probe 21 is connected to the circuit of the control valve, the ground end of the control valve is connected to the conductive probe 22, and the conductive probe 22 and the detection probe 21 are connected with the charged particles in the high temperature environment generated by the flame, so as to form a complete detection circuit.

[0033] In this way, the grounding end of the control valve can form a large loop with the conductive probe 22 instead of being connected to the grounding of the burner 10 or the shell of the gas stove, so it will not be affected by other structures. Therefore, when the flame exists, the conduction state is stable and the formed detection circuit is also stable.

[0034] During the operation of the burner 10, if the flame is extinguished due to soup spillage or other circumstances, there is no flame in the detection interval between the detection probe 21 and the conductive probe 22, and the detection probe 21 and the conductive probe 22 are no longer conductive. The detection probe 21, the control valve and the conductive probe 22 are in a non-conductive state, and the detection circuit is disconnected. Therefore, a control signal can be generated, and the control valve can be closed by the control signal to prevent gas leakage, which is safer to use.

[0035] Furthermore, the control assembly includes a mounting bracket 26. The mounting bracket 26 in this embodiment includes a first mounting hole 231 and a second mounting hole 241. The first mounting hole 231 and the second mounting hole 241 are arranged at intervals, and the detection probe 21 is inserted into the first mounting hole 231, and the conductive probe 22 is inserted into the second mounting hole 241. In this way, since the first mounting hole 231 and the second mounting hole 241 are arranged at intervals, the detection probe 21 and the conductive probe are spaced apart after being assembled to the corresponding hole positions, so that the assembly is more convenient, and the formed interval is relatively fixed.

[0036] It should be noted that in order to ensure that the detection probe 21 and the conductive probe 22 have a stable conduction state when the burner 10 is burning, the detection interval between the detection probe 21 and the conductive probe 22 should not be too large. However, if conductive materials such as soup or water are spilled during the combustion of the burner 10, if the detection interval is too small, the flame will be extinguished, and the spilled soup or water will also be conductive and cause interference. Therefore, a certain creepage distance needs to be reserved between the detection intervals so as not to be affected by other factors during the use of the burner 10.

[0037] Furthermore, the probe of the detection probe 21 extends out from the top of the first mounting hole 231 , and the mounting portion of the detection probe 21 is positioned by the first mounting hole 231 , so the assembly structure is stable.

[0038] Similarly, the two ends of the conductive probe 22 extend from the top and bottom of the first mounting hole 231 respectively, so that the top of the conductive probe 22 can correspond to the probe of the detection probe 21 to form a detection interval, and the bottom of the conductive probe 22 can extend to the ground for easy wiring.

[0039] Furthermore, a first mounting column 23 and a second mounting column 24 may be spaced apart on the mounting bracket 26, and the first mounting hole 231 passes through the first mounting column 23; the second mounting hole 241 passes through the second mounting column 24, so that the detection probe 21 can be connected to the first mounting hole 231 of the first mounting column 23, and the conductive probe 22 can be connected to the second mounting column 24. In this way, the mounting section of the detection probe 21 can be covered by the first mounting column 23, and the mounting section of the conductive probe 22 can be covered by the second mounting column 24, so as to prevent the probes from bending due to impact by external forces.

[0040] A connecting block 25 may be further provided between the first mounting column 23 and the second mounting column 24, so that the connecting block 25 can strengthen the connection strength between the first mounting column 23 and the second mounting column 24, making the installation structure of the detection probe 21 and the conductive probe 22 more stable and having better installation strength.

[0041] Furthermore, the burner 10 in this embodiment includes a combustion seat 11 and a fire cover assembly, and a drainage pipe 14 is provided in the combustion seat 11, and the drainage pipe 14 is used to introduce gas to the fire cover assembly. The detection probe 21 and the conductive probe 22 are arranged on the side of the fire cover assembly, so that when the burner 10 is in operation, the drainage pipe 14 can be connected to the gas pipe, and the control valve is used to control the connection or closing of the drainage pipe 14 and the gas pipe to allow the gas to be introduced or stopped, thereby realizing the opening or closing of the burner 10. After the gas is introduced, it enters the gas guide groove 111 of the combustion seat 11, and the fire cover assembly is sealed to the gas guide groove 111 of the combustion seat 11 to perform the combustion action.

[0042] Of course, the above-mentioned mounting bracket can be fixedly mounted on the combustion seat by means of screws or bolts, etc., so that it is easy to disassemble and assemble.

[0043] Furthermore, the fire cover assembly includes an outer fire cover ring 12 and an inner fire cover ring 13. The drainage pipe 14 can guide the gas to the gas guide groove 111 of the combustion seat 11, and then guide the introduced gas to the outer fire cover ring 12 and the inner fire cover ring 13. The outer fire cover ring 12 and the inner fire cover ring 13 are sealed on the combustion seat 11; the outer fire cover ring 12 is arranged around the outer periphery of the inner fire cover ring 13; the detection probe 21 and the conductive probe 22 are arranged between the outer fire cover ring 12 and the inner fire cover ring 13. In this way, even when it is adjusted to a low fire, only the inner fire cover ring 13 is burning, and there is flame in the detection interval, which can also form a normal conduction state and the detection circuit is stable.

[0044] It should be noted that the detection probe 21 and the conductive probe 22 can be arranged on the side close to the inner fire cover ring 13, so that when the burner 10 is burning, the inner fire cover ring 13 can be in a conductive state while keeping the fire.

[0045] Of course, the above-mentioned fire cover assembly can also be implemented by using the structure of an inner fire cover ring 13, a middle fire cover ring and an outer fire cover ring 12, or only one fire cover ring structure can be set. The specific selection can be made according to actual needs. The structure and working principle of the above-mentioned combustion seat 11 and the fire cover assembly are all existing technologies and will not be described in detail here.

[0046] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A stove flame detection structure, characterized in that: include, Burner; A control assembly, the control assembly comprising a control valve, a detection probe and a conductive probe, the control valve is used to control the opening or closing of the burner, the control valve has a grounding terminal; the detection probe and the conductive probe are arranged on the side of the burner and are spaced to form a detection interval; the detection probe is electrically connected to the control valve; the conductive probe is electrically connected to the grounding terminal of the control valve; The detection probe, the control valve and the conductive probe are used to be in a conductive state when there is a flame in the detection interval; the detection probe, the control valve and the conductive probe are used to be in a non-conductive state when there is no flame in the detection interval; the control valve controls the burner to be closed in the non-conductive state.

2. The stove flame detection structure according to claim 1, characterized in that: The control component includes a mounting bracket, the mounting bracket includes a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are arranged at intervals; the detection probe is inserted into the first mounting hole, and the conductive probe is inserted into the second mounting hole.

3. The stove flame detection structure according to claim 2, characterized in that: The probe head of the detection probe extends out from the top end of the first mounting hole.

4. The stove flame detection structure according to claim 2, characterized in that: Two ends of the conductive probe extend out from the top end and the bottom end of the first mounting hole respectively.

5. The stove flame detection structure according to claim 2, characterized in that: The mounting bracket is provided with a first mounting column and a second mounting column which are spaced apart from each other. The first mounting hole passes through the first mounting column; and the second mounting hole passes through the second mounting column.

6. The stove flame detection structure according to claim 5, characterized in that: A connecting block is provided between the first mounting column and the second mounting column.

7. The stove flame detection structure according to any one of claims 1 to 6, characterized in that: The burner comprises a combustion seat and a fire cover assembly. A drainage pipe is arranged in the combustion seat, and the drainage pipe is used to introduce the fuel gas into the fire cover assembly. The detection probe and the conductive probe are arranged on the side of the fire cover assembly.

8. The stove flame detection structure according to claim 7, characterized in that: The fire cover assembly includes an outer fire cover ring and an inner fire cover ring, the drainage pipe is used to guide the introduced fuel gas to the outer fire cover ring and the inner fire cover ring, the outer fire cover ring and the inner fire cover ring are sealed on the combustion seat; the outer fire cover ring is arranged around the outer periphery of the inner fire cover ring; the detection probe and the conductive probe are arranged between the outer fire cover ring and the inner fire cover ring.

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