GB2596140A

GB2596140A - A leak-proof gas stove

Info

Publication number: GB2596140A
Application number: GB2009386.0A
Authority: GB
Inventors: Wu Xianfeng; Li Guiyu
Original assignee: Nanjing Enwell Technology Service Co Ltd
Current assignee: Nanjing Enwell Technology Service Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-12-22
Also published as: GB202009386D0

Abstract

A leak-proof gas hob has a platform 1, a burner arrangement (2 Fig. 1) with cookware support 23 and an associated gas control system that includes a gas supply adjusting knob (5 Fig. 1). The gas control system includes a controller 61 that may include a temperature sensor 62, and the burner arrangement has a low flame burner 21, a high flame burner 22, and a pilot flame outlet 3. A gas supply pipeline (4 Fig. 3), 44, feeds gas to the high and low burner along a main gas supply pipeline 42 via a gas control valve connected to the adjusting knob. The pilot flame outlet passes through the high flame burner and is connected to the gas supply pipeline via a solenoid valve 43 and pilot gas supply pipeline 41. In use, the controller opens the solenoid valve according to the rotation angle of the adjusting knob on the main gas supply pipeline and ignites the gas at the low flame burner to form a flame. Because the pilot gas supply flow is independent of the burner main gas supply flow, the pilot flame remains stable, and should the low flame burner extinguish it can be reignited by the pilot flame and prevent leakage of gas into the environment.

Description

A LEAK-PROOF GAS STOVE

FIELD OF THE INVENTION

[0001] This application relates to the field of smart home technology, and in particular, to a leak-proof gas stove

BACKGROUND OF THE INVENTION

[0002] A household gas stove, which includes a gas combustion device and a flame adjusting knob, can adjust a magnitude of flame on the combustion device through the flame adjusting knob, so as to control a degree of heating during cooking. For example, when an operator turns the flame adjusting knob counterclockwise, an open degree of a valve on a gas pipeline will be increased, namely it is adjusted to be in a higher flame state; when the operator turns the flame adjusting knob clockwise, the open degree of the valve on the gas pipeline will be decreased, namely it is adjusted to be in a lower flame state.

100031 In a process of turning the flame adjusting knob on the gas pipeline clockwise from the higher flame state, the open degree of the valve on the gas pipeline will be gradually decreased until closed. That is, the combustion device will undergo a process of transiting from a higher flame state to a lower flame state until being closed. As the adjusting knob is close to a zero position state, the valve on the gas pipeline is not completely shut off, but there is rather little amount of gas entering the combustion device through the valve. The gas entering the combustion device through the gas pipeline needs to be further distributed to a plurality of flame holes, such that the gas supply amount in each flame hole will be dramatically reduced, which may easily result in the flame extinguishing problem of the combustion device. If the operator cannot be aware of the flame extinguishing problem in time, this will result in gas leakage from the gas pipeline.

[0004] In order to prevent flame extinguishing of the combustion device from occurring when the flame is adjusted to be in a lower flame state, the number of flame holes on the combustion device can be reduced, such that the gas of a low concentration in the gas pipeline can uniformly enter the flame holes. However, such manner that the gas within the pipeline is uniformly distributed to respective flame holes as the gas amount involving in combustion is not changed, may result in the fact that, after a flame on one flame hole goes out, other flames on other flame holes would also go out easily Further, once some of the flame holes are blocked after being used for a long time, and a plurality of combustion holes cannot be ignited by each other, flame extinguishing may occur more easily, thereby resulting in the problem of gas leakage.

SUMMARY OF THE INVENTION

100051 This application provides a leak-proof gas stove to solve the problem of gas leakage caused by flame extinguishing easily occurring on a traditional gas stove when it is adjusted to be in a lower flame state.

100061 This application provides a leak-proof gas stove, including: a platform, a combustion device, a combustion-assisting needle, a gas pipeline and a control system, wherein the platform is provided thereon with a combustion hole, through which the combustion device is received, and the gas pipeline and the control system are disposed below the platform. The combustion device further includes a lower flame combusting section, a higher flame combusting section and a cooker supporting section, wherein the higher flame combusting section is disposed within the combustion hole at a periphery of the lower flame combusting section. Where the combustion device is in a higher flame state, gas is fed to the lower flame combusting section and the higher flame combusting section simultaneously to form a flame for heating cookers placed on the cooker supporting section; and where the combustion device is in a lower flame state, gas is only fed to the lower flame combusting section, through which cookers placed on the cooker supporting section are heated. Therefore, the cooker supporting section may be disposed on the platform at a periphery of the higher flame combusting section.

100071 In order to prevent the flame on the combustion device from extinguishing when the flame is adjusted to be lower, the combustion-assisting needle may be disposed above the lower flame combusting section, such that when the flame is adjusted to be lower, the combustion-assisting needle is used to maintain the flame, and simultaneously ignite the gas released from the lower flame combusting section. In this case, the combustion-assisting needle has a tubular structure disposed above the lower flame combusting section. The gas pipeline includes a combustion-assisting pipeline and a gas supply pipeline, wherein the combustion-assisting needle passes through the higher flame combusting section and is in communication with the combustion-assisting pipeline, that is, gas is supplied to the combustion-assisting needle through the combustion-assisting pipeline. The lower flame combusting section and the higher flame combusting section are both in communication with the gas supply pipeline to implement a normal operation of the combustion device 100081 The control system includes a controller for controlling whether to open the combustion-assisting pipeline according to a current combustion state of the combustion device. Correspondingly, the gas supply pipeline is provided thereon with an adjusting knob, which is configured to adjust a gas flow in the gas supply pipeline by rotation of the same. The combustion-assisting pipeline is provided with a combustion-assisting solenoid valve thereon to control opening and closing of the combustion-assisting pipeline through the combustion-assisting solenoid valve. In this case, the controller is connected to the adjusting knob and the combustion-assisting solenoid valve to control opening and closing of the combustion-assisting solenoid valve according to a rotation angle of the adjusting knob.

100091 In the leak-proof gas stove as provided in this application, the gas supply pipeline and the combustion-assisting pipeline in the gas pipeline feed gas to the combustion device and the combustion-assisting needle respectively, such that the combustion device and the combustion-assisting needle can respectively form a flame. The controller can determine whether to open the combustion-assisting solenoid valve on the combustion-assisting pipeline according to the rotation angle of the adjusting knob on the gas supply pipeline. Where the rotation angle of the adjusting knob is less than a preset safety value, the controller controls an opening of the combustion-assisting solenoid valve to release the gas to the above of the lower flame combusting section through the combustion-assisting needle, and ignite the gas by the flame on the lower flame combusting section to form an independently burning flame. Because a magnitude of the flame formed on the combustion-assisting needle is free of a control from the adjusting knob, the flame on the combustion-assisting needle can still be maintained to be stable even though the rotation angle of the adjusting knob is too small, so that it is advantageous for maintain the flame on the lower flame combusting section. Furthermore, when the flame on the lower flame combusting section goes out, the released gas can be reignited by the flame on the combustion-assisting needle, so as to prevent any leaking gas from escaping to the space, thereby solving the problem of gas leakage caused by flame extinguishing easily occurring on a traditional gas stove when it is adjusted to be in a lower flame state.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG 1 is a schematic diagram of a stereo structure of a leak-proof gas stove as provided in this application, 100111 FIG 2 is a structural schematic diagram of top view of a leak-proof gas stove as provided in this application; [0012] FIG. 3 is a structural schematic diagram of a gas pipeline of a leak-proof gas stove as provided in this application; [0013] FIG 4 is a structural schematic diagram of a combustion device as provided in this application; 100141 FIG 5 is a schematic diagram of a connection structure of a control system as provided in this application; 100151 FIG 6 is a schematic diagram of another connection structure of a control system as provided in this application; [0016] FIG 7 is a schematic diagram of a connection structure between an adjusting knob and a control system as provided in this application.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Referring to FIG. 1, it is a structural schematic diagram of a leak-proof gas stove as provided in this application. The leak-proof gas stove as provided in this application, includes: a platform 1, a combustion device 2 and a gas pipeline 4. Herein, the platform 1 is used for mounting and fixing other parts in the gas stove, such that a separation between an operating plane of the gas stove and its interior parts is accomplished. That is, in an practical application, a clear platform surface is maintained above the platform 1, provided with at least one combustion hole 11 for mounting and receiving the combustion device 2, that is, the combustion device 2 is disposed within the combustion hole 11. Depending on different shapes and combustion manners of the combustion device 2, the combustion hole 11 also correspondingly has different shapes. Exemplarily, the combustion device 2 is cylindrical shaped, then the combustion hole 11 may have a circular through-hole structure set on the platform 1.

100181 As shown in FIG 2, the combustion device 2 is a direct heat source during cooking, that is, to provide a combustion space for gas. In practical application, the combustion device 2 may release gas that will contact oxygen in air to form a stable flame once ignited. As per requirements for different degrees of heating, a height of the flame on combustion device 2 can be further adjusted. In this case, the combustion device 2 includes a lower flame combusting section 21, a higher flame combusting section 22 and a cooker supporting section 23. The lower flame combusting section 21 can meet the requirement for lower degree of heating in cooking, while the higher flame combusting section 22 can meet the requirement for higher degree of heating in cooking. The cooker supporting section 23 supports cookers that need to be heated through a bracket having a triangular, trapezoidal, T-shaped or L-shaped structure or the like, so as to rest the cookers above the combustion device 2.

100191 In practical application, where the combustion device 2 is in a higher flame state, gas is fed to the lower flame combusting section 21 and the higher flame combusting section 22 simultaneously to form a flame for heating cookers placed on the cooker supporting section 23; and where the combustion device 2 is in a lower flame state, gas is only fed to the lower flame combusting section 21, through which cookers placed on the cooker supporting section 23 are heated. In this case, the higher flame combusting section 22 is disposed within the combustion hole 11 at a periphery of the lower flame combusting section 21, and the cooker supporting section 23 is disposed on the platform 1 at a periphery of the higher flame combusting section 22. As an illustration, the lower flame combusting section 21 has a cylindrical-shaped structure, and the higher flame combusting section 22 has a cylinder structure coaxial with the lower flame combusting section 21.

[0020] In order to prevent flame on the lower flame combusting section 21 from extinguishing in the lower flame state, the leak-proof gas stove provided in this application further includes a combustion-assisting needle 3 connected to the gas pipeline 4 and a control system 6. Herein, the combustion-assisting needle 3 is used for generating a continuous flame in the lower flame state to prevent flame on the lower flame combusting section 21 from extinguishing. The control system 6 can detect by a sensor whether the current combustion device is in the lower flame state, and initiate the combustion-assisting needle 3 provided that the combustion device is in the lower flame state.

100211 In this case, to be specific, the combustion-assisting needle 3 has a tubular structure disposed above the lower flame combusting section 2L In practical application, the combustion-assisting needle 3 has a tubular structure that can be fed with gas into its interior, and the fed gas can be further introduced to a tip position of the combustion-assisting needle 3 and finally released therefrom. Exemplarily, the combustion-assisting needle 3 is fixed on an inner sidewall of the higher flame combusting section 22. In practical application, the interior of the combustion-assisting needle 3 needs to be fed with a sufficient amount of gas, while it only needs to maintain a flame on combustion-assisting needle 3, in this case the combustion-assisting needle 3 can be selected to have a tubular structure with a smaller inner diameter. Exemplarily, a value of the inner diameter of the combustion-assisting needle 3 is ranged from 2 mm to 10 mm. In order to obtain a continuous gas flow at the tip position of the combustion-assisting needle 3, the combustion-assisting needle 3 can also have a tapered pipe structure which is gradually narrowed to gradually congregate gas pressures in the pipeline, so as to obtain a more stable flame upon a low consumption of gas.

[0022] As shown in FIGS. 3 and 4, the gas pipeline 4 includes a combustion-assisting pipeline 41 and a gas supply pipeline 42. The combustion-assisting needle 3 passes through the higher flame combusting section 22 to be in communication with the combustion-assisting pipeline 41, that is, the combustion-assisting pipeline 41 feeds gas to the combustion-assisting needle 3. The lower flame combusting section 21 and the higher flame combusting section 22 are both in communication with the gas supply pipeline 42, that is, the gas supply pipeline 42 feeds gas to the combustion device 2. Furthermore, the gas supply pipeline 42 is provided thereon with an adjusting knob 5, through which a height of flame on the combustion device 2 is adjusted. In practical application, the gas supply pipeline 42 may be the same as a gas supply pipeline of a traditional gas stove, and the combustion-assisting pipeline 41 can serve as a branch of the gas supply pipeline 42, thereby accomplishing independent gas supply to the combustion-assisting needle 3.

100231 That is, in part of embodiments of this application, the combustion-assisting pipeline 41 is in communication with the gas supply pipeline 42 in a connection position of them disposed before a position where the adjusting knob 5 is mounted, such that a gas pressure inside the combustion-assisting pipeline 41 is greater than a gas pressure, adjusted by the adjusting knob 5, inside the gas supply pipeline 42. In this embodiment, if a direction of the gas flow in the gas supply pipeline 42 is defined to be from front to rear, the connection position on the gas supply pipeline 42, where the combustion-assisting pipeline 41 is interconnected therewith, is disposed before the position where the adjusting knob 5 is mounted. This may be represented as that: the gas supply pipeline 42 is first branched by the combustion-assisting pipeline 41, and then mounted with the adjusting knob 5, such that a part of the gas in the gas supply pipeline 42 firstly enters the combustion-assisting pipeline 41, and then the other part of the gas enters the combustion device 2 after being pressure-adjusted by the adjusting knob 5.

100241 Obviously, the structure in this embodiment can allow the gas pressure in the combustion-assisting pipeline 41 to be free of the affect of the adjusting knob 5. That is, in practical application, if the operator adjusts the flame on the combustion device 2 to be lower through the adjusting knob 5, the pressure of the gas entering the combustion-assisting pipeline 41 can be held unchanged, such that the flame on the combustion-assisting needle 3 can be maintained stable without going out even if the flame on the combustion device 2 easily goes out due to too little amount of gas fed thereto.

100251 Further, in another embodiment of this application, the gas pipeline 4 further includes a main pipeline 44 connected to a municipal gas supply pipe, and the combustion-assisting pipeline 41 and the gas supply pipeline 42 are respectively in communication with the gas pipeline 4 to respectively obtain gas supply through the main pipeline 44. In this embodiment, one gas stove can include a plurality of combustion devices 2, and as shown in F1G1, the gas stove can be provided with two combustion devices 2 thereon. The main pipeline 44 can be connected to the municipal gas supply pipe, that is, a municipal gas is communicated with and introduced into the main pipeline 44, and then shunted through the main pipeline 44 to provide shunts to the plurality of combustion device 2. Obviously, a number of the combustion devices 2 included by the gas stove should be the same as a number of the shunts through the main pipeline 44. The gas supply pipeline 42 corresponding to one combustion device 2 may be connected to the main pipeline 44 through the adjusting knob 5, and meanwhile, the combustion-assisting pipeline 41 is also connected to the main pipeline 44.

[0026] It can be seen that, this embodiment can satisfy the gas supply requirement for a plurality of combustion devices 2. As the combustion-assisting pipeline 41 and the gas supply pipeline 42 are connected to the main pipeline 44 in parallel, the adjusting knob 5 disposed on the gas supply pipeline 42 will also not affect the gas supply pressure in the combustion-assisting pipeline 41 during adjustment.

[0027] As can be seen from the above solution, the operating object of the combustion-assisting pipeline 41 and the combustion-assisting needle 3 in the solution of this application is to hold a burning flame within a region corresponding to the combustion device 2.

Hence, for the combustion-assisting pipeline 41 and the combustion-assisting needle 3, the requirement for a gas supply state is to hold a stable and continuous gas supply flow, without need of a great amount of gas supply. In order to arrive at such gas supply state, in a part of embodiments of this application, the combustion-assisting pipeline 41 has an inner diameter less than an inner diameter of the gas supply pipeline 42, such that a gas pressure inside the combustion-assisting pipeline 41 is greater than a gas pressure inside the gas supply pipeline 42 during the operation.

[0028] Where the inner diameter of the combustion-assisting pipeline 41 is less than that of the gas supply pipeline 42, it may not only provide a relatively small amount of gas entering the combustion-assisting pipeline 41 to save gas, but also increase a gas pressure at a tip position of the combustion-assisting needle 3 due to the narrowed inner diameter during feeding gas from the gas supply pipeline 42 or the main pipeline 44 to the combustion-assisting pipeline 41, so as to facilitate a successful gas releasing to maintain a stable gas flow.

100291 In the technical solution as provided in this application, as shown in FIG 5, the control system 6 is used to detect whether the operator adjusts the combustion device 2 to a lower flame state through the adjusting knob 5 The control system 6 may include a controller 61 that refers to a chip having data-processing capacity and generating control instructions, such as a MCU, a microprocessor, a single-chip machine, a PLC, etc. The combustion-assisting pipeline 41 is provided thereon with a combustion-assisting solenoid valve 43 that can control opening and closing of the combustion-assisting pipeline 41. The combustion-assisting solenoid valve 43 can implement a control on the combustion-assisting pipeline 41 under the control of the controller 61. The combustion-assisting solenoid valve 43 may only be set in two states: opening and closing states, and may also be set in various or continuous states corresponding to different open degrees of the valve. The controller 61 is connected to the adjusting knob 5 and the combustion-assisting solenoid valve 43 to control opening and closing of the combustion-assisting solenoid valve 43 according to a rotation angle of the adjusting knob 5.

100301 In practical application, because the adjusting knob 5 at different rotation angles corresponds to different gas flows in the gas supply pipeline 42, the operator may adjust a height of the flame on the combustion device 2 by turning the adjusting knob 5 to obtain different degrees of heating in cooking. Correspondingly, when it is required to adjust to a lower flame from a higher flame, the operator needs to turn the adjusting knob 5 clockwise to a zero position. In this case, the controller 61 can determine whether the current cooking state is adjusted to be in a lower flame state by detecting variation of the rotation angles of the adjusting knob 5.

100311 For example, the rotation angle of the adjusting knob 5 at the zero position is set to be 0 degree. In a higher flame state, the rotation angle of the adjusting knob 5 is 90 degrees (or more than 90 degrees), and when the rotation angle of the adjusting knob 5 is detected to be reduced to 20 degrees from 90 degrees, the controller 61 determines the current cooking state is adjusted to be in a lower flame state. Where a threshold value of the rotation angle is set to be 15 degrees, when the adjusting knob 5 reduces the rotation angle to 15 degrees, the controller 61 will generate and send an opening instruction to the combustion-assisting solenoid valve 43. After receiving the opening instruction, the combustion-assisting solenoid valve 43 will be automatically opened under electromagnetic action to feed gas to the combustion-assisting pipeline 41.

[0032] The gas entering the combustion-assisting pipeline 41 can be introduced to the combustion-assisting needle 3 through the combustion-assisting pipeline 41 and released at the tip position of the combustion-assisting needle 3. Because at this time there still exists a flame on the lower flame combusting section 21, this part of flame can be ignited by the gas released from the combustion-assisting needle 3 to form a continuous flame on the combustion-assisting needle 3. At this time, even if the rotation angle of the adjusting knob 5 is further adjusted to fall in an angle range that may easily trigger flame extinguishing, such as a range of 0 degree to 10 degree, the flame on the combustion-assisting needle 3 will be further continuously burning without easily going out.

100331 Apparently, in the embodiment of this application, where the adjusting knob 5 returns to the zero position, it represents that the operator intends to directly turn off, in this case the combustion-assisting solenoid valve 43 can be directly controlled to be closed to implement turn off In order to prevent misoperation and avoid the combustion-assisting needle 3 of affecting a normal cooking procedure, the controller 61 of this application may be internally provided with other auxiliary control programs. For example, the controller 61 may not make determination of a lower flame adjusting state when the rotation angle of the adjusting knob 5 is adjusted counterclockwise. For another example, because the operator may generally operate sooner when he intends to directly turn off the gas stove, the controller 61 may make further determination upon a variation speed of the rotation angle of the adjusting knob 5, and may not make determination of the lower flame adjusting state when the variation speed of the rotation angle is faster.

[0034] In order to allow the flame on the combustion-assisting needle 3 to more effectively influence the gas released from the lower flame combusting section 21, in a part of embodiments of this application, a number of the combustion-assisting needles 3 is plural, and a plurality of the combustion-assisting needles 3 are circumstantially uniformly distributed on the inner sidewall of the higher flame combusting section 22, centered by a center axis of the lower flame combusting section 21. Correspondingly, the combustion-assisting pipeline 41 may be disposed below the higher flame combusting section 22. The plurality of the combustion-assisting needles 3 pass through the higher flame combusting section 22 to be in communication with the combustion-assisting pipeline 41. In this embodiment, the plurality of the combustion-assisting needles 3 may ignite at multiple positions the gas escaped from the lower flame combusting section 21 to maintain stability of the lower flame state.

[0035] In order to more accurately determine whether it is to be a lower flame adjusting state, in a part of embodiments of this application, the control system 6 further includes a temperature sensor 62 disposed on the combustion device 2. The temperature sensor 62 in this embodiment may be a contact temperature sensor disposed on the combustion device 2 or the platform 1, such as a thermal resistor; and may also be a contactless temperature sensor disposed within a region around the combustion device 2, such as an infrared temperature detector. The temperature sensor 62 is connected to the controller 61 to send a detected temperature signal thereto, such that the controller 61 then determines whether to open the combustion-assisting solenoid valve 43 according to a temperature within a combustion region and the rotation angle of the adjusting knob 5.

100361 For example, the temperature signal detected by the temperature sensor 62 is represented as that, a state substantially higher than a room temperature is maintained for a long time, and the rotation angle of the adjusting knob 5 is not at the zero position, which indicates that the current gas stove is in cooking. Where the rotation angle of the adjusting knob 5 in such state is detected to become smaller, it can be determined that the current state is the lower flame adjusting state 100371 As can be seen from the above solution, in the technical solutions as provided in this application, a determination of whether the current gas stove is in the lower flame adjusting state mainly depends on a detection on the rotation angle of the adjusting knob 5. However, as for most of the existing adjusting knobs 5, they cannot output their rotation angles outward by themselves, even cannot be connected to the controller 61. Hence, in a part of embodiments of this application, the adjusting knob 5 may be provided thereon with an angle sensor 63 that may be a grating angle sensor, a slide-resistance angle sensor, etc. The angle sensor 63 is connected to a rotating shaft of the adjusting knob 5 to detect the rotation angle of the adjusting knob 5. The angle sensor 63 is further connected to the controller 61 to send detected data of the rotation angle to the controller 61.

100381 As for the technical solution as provided in this application, where the rotation angle of the adjusting knob 5 is within a range of rotation angles that may easily trigger flame extinguishing, the flame on the lower flame combusting section 21 will often go out. Once the flame goes out, the lower flame combusting section 21 will leak gas outward. As for the leaked gas, if its flow is relatively higher, it will be ignited again by the flame of the combustion-assisting needles 3 to form a continuous flame; and if its flow is relatively lower, it will involve in a combustion process nearby the combustion-assisting needle 3 without escaping to the ambient indoor. However, where the adjusting knob 5 stays in such state for a long time, this may result in waste of gas and also a confused combustion direction of the flame, which is unfavorable to the cooking procedure.

100391 In order to avoid the above problem, in a part of embodiments of this application, as shown in FIG 6, the control system 6 further includes an alarm 64. The alarm 64 may be a part disposed below the platform 1, and can generate a sound signal or an optical signal to inform of the operator that the flame on the lower flame combusting section 21 has been extinguished. Further, the combustion-assisting pipeline 41 and the gas supply pipeline 42 are each provided thereon with a flow meter 45 that can detect gas flows in the gas supply pipeline 42 and the combustion-assisting pipeline 41. The controller 61 is connected with the flow meter 45 to control the alarm 64 to generate an alarm signal according to a gas flow in the combustion-assisting pipeline 41 and an starting time thereof.

100401 Further, as shown in FIG 7, the control system 6 further includes a reset electric motor 65 connected to the adjusting knob 5. The reset electric motor 65 may be a servo motor or a stepping motor or the like that can be controlled by the controller 61 to rotate by a preset angle. A center axis of the adjusting knob 5 is connected to an output shaft of the reset electric motor 65 to alter the rotation angle of the adjusting knob 5 through the reset electric motor 65. The controller 61 is connected to the reset electric motor 65 to turn the adjusting knob 5 to the zero position when the gas flow in the gas supply pipeline 42 is excessively lower.

100411 As can be seen from the above technical solution, in the leak-proof gas stove as provided in this application, the gas supply pipeline 42 and the combustion-assisting pipeline 41 in the gas pipeline 4 respectively feed gas to the combustion device 2 and the combustion-assisting needle 3, such that the combustion device 2 and the combustion-assisting needle 3 can respectively form a flame. The controller 61 can determine whether to open the combustion-assisting solenoid valve 43 on the combustion-assisting pipeline 41 according to the rotation angle of the adjusting knob 5 on the gas supply pipeline 42. Where the rotation angle of the adjusting knob 5 is less than a preset safety value, the controller 61 controls an opening of the combustion-assisting solenoid valve 43 to release the gas through the combustion-assisting needle 3 to the above of the lower flame combusting section 21, and ignite the gas by the flame on the lower flame combusting section 21 to form an independently combustion flame.

100421 Because a height of the flame formed on the combustion-assisting needle 3 is free of control of the adjusting knob 5, the flame on the combustion-assisting needle 3 can still be maintained to be stable when the rotation angle of the adjusting knob 5 is excessively small, such that it is advantageous to maintain the flame on the lower flame combusting section 21. Furthermore, when the flame on the lower flame combusting section 21 goes out, the released gas can be reignited by the flame on the combustion-assisting needle 3, so as to prevent any leaked gas from escaping to the indoor space, thereby solving the problem of gas leakage caused by flame extinguishing easily occurring on a traditional gas stove in a lower flame adjusting state.

Claims

WHAT IS CLAIMED IS: 1. A leak-proof gas stove, comprising: a platform (1) provided with a combustion hole (11) thereon; a combustion device (2) disposed within the combustion hole (11) and comprising a lower flame combusting section (21), a higher flame combusting section (22) and a cooker supporting section (23); and a gas pipeline (4), wherein the higher flame combusting section (22) is disposed within the combustion hole (11) at a periphery of the lower flame combusting section (21), and the cooker supporting section (23) is provided on the platform (1) at a periphery of the higher flame combusting section (22); characterized in that, the leak-proof gas stove further comprises a combustion-assisting needle (3) connected to the gas pipeline (4), and a control system (6), wherein, the combustion-assisting needle (3) has a tubular structure disposed above the lower flame combusting section (21), and the gas pipeline (4) comprises a combustion-assisting pipeline (41) and a gas supply pipeline (42), wherein the combustion-assisting needle (3) passes through the higher flame combusting section (22) and is in communication with the combustion-assisting pipeline (41), and the lower flame combusting section (21) and the higher flame combusting section (22) are both in communication with the gas supply pipeline (42), and the control system (6) comprises a controller (61), the gas supply pipeline (42) is provided thereon with an adjusting knob (5), and the combustion-assisting pipeline (41) is provided thereon with a combustion-assisting solenoid valve (43), wherein the controller (61) is connected with the adjusting knob (5) and the combustion-assisting solenoid valve (43) to control opening and closing of the combustion-assisting solenoid valve (43) according to a rotation angle of the adjusting knob (5).
2. The leak-proof gas stove according to claim 1, characterized in that, the gas pipeline (4) further comprises a main pipeline (44) connected to a municipal gas supply pipe, and the combustion-assisting pipeline (41) and the gas supply pipeline (42) are respectively in communication with the gas pipeline (4) to respectively obtain gas supply through the main pipeline (44).
3. The leak-proof gas stove according to claim 1 or claim 2, characterized in that, the combustion-assisting pipeline (41) is in communication with the gas supply pipeline (42), wherein the connection position of them is disposed before a position where the adjusting knob (5) is mounted, such that a gas pressure of the combustion-assisting pipeline (41) is greater than that of the gas supply pipeline (42), which is adjusted by the adjusting knob (5).
4. The leak-proof gas stove according to any preceding claim, characterized in that, the control system (6) further comprises a temperature sensor (62) disposed on the combustion device (2), wherein the temperature sensor (62) is connected to the controller (61), such that the controller (61) determines whether to open the combustion-assisting solenoid valve (43) according to a temperature within a combustion region and the rotation angle of the adjusting knob (5)
5. The leak-proof gas stove according to any preceding claim, characterized in that, the combustion-assisting pipeline (41) has an inner diameter less than that of the gas supply pipeline (42), such that a gas pressure of the combustion-assisting pipeline (41) is greater than a gas pressure of the gas supply pipeline (42) during operation.
6. The leak-proof gas stove according to any preceding claim, characterized in that, the adjusting knob (5) is provided thereon with an angle sensor (63), wherein the angle sensor (63) is connected with a rotating shaft of the adjusting knob (5) to detect the rotation angle of the adjusting knob (5), and is further connected with the controller (61) to send detected data of the rotation angle to the controller (61).
7. The leak-proof gas stove according to any preceding claim, characterized in that, the control system (6) further comprises an alarm (64), and the combustion-assisting pipeline (41) and the gas supply pipeline (42) are each provided thereon with a flow meter (45), wherein the controller (61) is connected to the flow meter (45) to control the alarm (64) to generate an alarm signal according to a gas flow in the combustion-assisting pipeline (41) and an opening time thereof
8. The leak-proof gas stove according to claim 7, characterized in that, the control system (6) further comprises a reset electric motor (65) connected to the adjusting knob (5), wherein the controller (61) is connected to the reset electric motor (65) to turn the adjusting knob (5) to a zero position when the gas flow in the gas supply pipeline (42) is excessively low.
9. The leak-proof gas stove according to any preceding claim, characterized in that, the lower flame combusting section (21) has a cylindrical-shaped structure, and the higher flame combusting section (22) has a cylinder structure coaxial with the lower flame combusting section (21), wherein the combustion-assisting needle (3) is fixed on an inner sidewall of the higher flame combusting section (22).The leak-proof gas stove according to claim 9, characterized in that, number of the combustion-assisting needles (3) is plural, and a plurality of the combustion-assisting needles (3) are circumstantially uniformly distributed on the inner sidewall of the higher flame combusting section (22), and centered by a centre axis of the lower flame combusting section (21); and the combustion-assisting pipeline (41) is disposed below the higher flame combusting section (22), wherein the plurality of the combustion-assisting needles (3) pass through the higher flame combusting section (22) and are in communication with the combustion-assisting pipeline (41).