Safety ignition system and gas equipment

Abstract

The present invention discloses a safety ignition system and a gas appliance applying the safety ignition system. The gas appliance includes a main pipeline communicated with premixed gas. The safety ignition system includes: an ignition device, which includes an ignition needle, a ground wire, an induction needle and a gas guide pipe. The ignition needle and the induction needle are both used for being electrically connected to the power supply of the gas appliance and are both disposed adjacent to the ground wire and the gas guide pipe. The gas guide pipe is used for being arranged in parallel with the main pipeline. One end of the gas guide pipe is provided with an air outlet nozzle, and the other end is used for communicating air and a gas source. The ground wire is aligned with the air outlet nozzle; and a flameout protection control device, which is arranged on the main pipeline and is electrically connected to the induction needle for controlling the flow or blocking of the premixed gas in the main pipeline. The technical solution of the present invention can overcome the potential safety hazards existing in the existing ignition system and ensure the safety of the ignition operation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment, and particularly relates to a safety ignition system and a gas equipment applying the safety ignition system. Background Art

[0002] Currently, gas equipment (gas cookers) are generally kitchen utensils that use gas fuels such as liquefied petroleum gas, artificial gas, and natural gas for direct fire heating, and are adopted by most families. Especially for the forced-draft gas setting, with gas as the heat source, a blower conveys the gas into the gas hood. However, during the ignition process, safety accidents are likely to occur. For example, before ignition, excessive gas is introduced, causing deflagration in the combustion chamber, damaging the equipment, and even causing an explosion, resulting in serious casualties and economic losses; or when the gas source pressure is unstable, with large fluctuations, and when gas leaks, the fire cannot be extinguished in time, causing safety accidents, etc. Summary of the Invention

[0003] The main object of the present invention is to provide a safety ignition system and a gas equipment, aiming to overcome the safety hazards existing in the existing ignition system and ensure the safety of the ignition operation.

[0004] To achieve the above object, the safety ignition system proposed by the present invention is applied to a gas equipment. The gas equipment includes a main pipeline connected to premixed gas, a gas hood, and at least one burner disposed on the gas hood. The safety ignition system includes: an ignition device installed on the gas hood and disposed adjacent to the burner; including an ignition needle, a ground wire, an induction needle, and a gas guide pipe. Both the ignition needle and the induction needle are used for electrically connecting to the power supply of the gas equipment and are both disposed adjacent to the ground wire and the gas guide pipe. The gas guide pipe is used for being arranged in parallel with the main pipeline. One end of the gas guide pipe is provided with an air outlet nozzle, and the other end is used for connecting air and a gas source. The ground wire is aligned with the air outlet nozzle; further including a mounting bracket, the mounting bracket is provided with a first mounting through hole, a second mounting through hole, a third mounting through hole, and a mounting hole. The ignition needle is inserted and exposed at both ends of the first mounting through hole, the induction needle is inserted and exposed at both ends of the second mounting through hole, the gas guide pipe is inserted and exposed at both ends of the third mounting through hole, and the ground wire is inserted and exposed at one end of the mounting hole; the air outlet nozzle is disposed adjacent to the exposed end of the ground wire; a flameout protection control device is disposed on the main pipeline and electrically connected to the induction needle, and is used for controlling the flow or blocking of the premixed gas in the main pipeline.

[0005] Optionally, the ignition needle includes a main body portion and an ignition portion. The main body portion is inserted into and exposed at both ends of the first installation through-hole, and is electrically connected to the power supply. The ignition portion is provided at one end of the main body portion and extends bent towards the ground wire; and / or, the induction needle includes a connecting portion and an induction portion. The connecting portion is inserted into and exposed at both ends of the second installation through-hole, and is electrically connected to the power supply and the flameout protection control device. The induction portion is provided at one end of the connecting portion and extends bent towards the ground wire.

[0006] Optionally, the mounting bracket is further provided with a first limiting hole communicating with the first installation through-hole, a second limiting hole communicating with the second installation through-hole, and a third limiting hole communicating with the third installation through-hole; the ignition device further includes a first fastener, a second fastener, and a third fastener; the first fastener is inserted into the first limiting hole and abuts against the ignition needle; the second fastener is inserted into the second limiting hole and abuts against the induction needle; the third fastener is inserted into the third limiting hole and abuts against the gas guide pipe.

[0007] Optionally, the ignition device further includes a protective cover, and the protective cover covers the mounting bracket.

[0008] Optionally, a limiting notch is provided on the outer wall surface of the mounting bracket, and a plugging portion is provided on one side of the protective cover facing the mounting bracket. The plugging portion is inserted into the limiting notch.

[0009] Optionally, a flow guiding cap is further provided at the upper end of the gas guide pipe. The flow guiding cap is provided with a flow guiding cavity and a flow guiding port communicating with the flow guiding cavity. The flow guiding port faces the ground wire, and the air outlet nozzle is accommodated in the flow guiding cavity.

[0010] Optionally, the flameout protection control device includes a controller and a solenoid valve. The solenoid valve is provided on the main pipeline. The controller is electrically connected to the solenoid valve and the induction needle. The controller controls the on-off of the solenoid valve according to the temperature of the induction needle to control the on-off of the main pipeline.

[0011] The technical solution of the present invention, the safety ignition system of the gas equipment includes an ignition device and a flameout protection control device. The ignition device includes an ignition needle, a ground wire, an induction needle and a gas duct. The ignition needle and the induction needle are both used for electrically connecting to a power source and are both arranged adjacent to the ground wire and the gas duct. The gas duct is used for being arranged in parallel with the main pipeline communicating with the premixed gas, and one end of the gas duct is provided with an air outlet nozzle, and the other end is provided for communicating with the air and the gas source, and the ground wire is aligned with the air outlet nozzle. At the same time, the flameout protection control device is arranged on the main pipeline and is electrically connected to the induction needle for controlling the flow or blocking of the premixed gas in the main pipeline. Thus, when an ignition operation is carried out, the power source is turned on and air and gas are introduced into the gas duct. The air and gas are mixed in the gas duct, and the mixed gas is ejected from the air outlet nozzle. The mixed gas is ignited after generating an electric spark between the ignition needle and the ground wire to form an ignition flame. The induction needle senses the temperature of the ignition flame and feeds back the sensed temperature value signal to the flameout protection control device. As the ignition time prolongs, the induction needle is gradually burned red. When the temperature sensed by the induction needle reaches a preset value, the flameout protection control device controls the flow of the premixed gas in the main pipeline. Under the ignition action of the ignition flame, the premixed gas flowing out of the main pipeline burns to heat an object. If the ignition flame goes out, the temperature sensed by the induction needle cannot reach the preset value, then the flameout protection control device controls the blocking of the flow of the premixed gas in the main pipeline, thereby cutting off the gas passage of the main pipeline and playing a role in safety protection. The safety ignition system of the present invention can effectively overcome the potential safety hazards existing in the existing ignition system, thereby ensuring the safety of the ignition operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the safety ignition system of the present invention;

[0014] Figure 2 is Figure 1 a schematic structural diagram of an embodiment of the ignition device in

[0015] Figure 3 a schematic structural diagram of one perspective after the protective cover of the ignition device is removed;

[0016] Figure 4 a schematic structural diagram of another perspective after the protective cover of the ignition device is removed;

[0017] Figure 5Schematic structural diagram of another perspective of the protective cover after the ignition device is removed;

[0018] Figure 6 Schematic structural diagram of one perspective of the mounting bracket in the ignition device;

[0019] Figure 7 Schematic structural diagram of another perspective of the protective cover in the ignition device;

[0020] Figure 8 Partial schematic structural diagram of another perspective of the protective cover after the ignition device is removed.

[0021] Explanation of the reference numerals in the drawings:

[0022]

[0023] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Please refer to Figures 1 to 3 , the present invention provides a safety ignition system 100, which is applied to a forced-draft gas device, such as a forced-draft gas stove. A forced-draft gas device is generally a closed space and needs to introduce a mixed gas of gas and air to burn. The gas device includes a main pipeline connected to the premixed gas. Generally, the other end of the main pipeline is connected to the gas hood 200 of the gas device. The premixed gas flows along the main pipeline and is ejected from the gas hood 200 and then ignited to heat an object.

[0030] Please refer to again Figure 1 and Figure 2 , in an embodiment of the safety ignition system 100 of the present invention, the safety ignition system 100 includes: an ignition device 10, including an ignition needle 12, a ground wire 13, an induction needle 14, and an air duct 15. Both the ignition needle 12 and the induction needle 14 are used for electrical connection to the power supply of the gas device and are both disposed adjacent to the ground wire 13 and the air duct 15. The air duct 15 is used for parallel connection with the main pipeline. One end of the air duct 15 is provided with an air outlet nozzle 151, and the other end is used for connecting to an air and gas source. The ground wire 13 is disposed opposite to the air outlet nozzle 151; and a flameout protection control device 30, which is disposed on the main pipeline and is electrically connected to the induction needle 14, and is used to control the flow or blockage of the premixed gas in the main pipeline.

[0031] Specifically, the ignition needle 12, the ground wire 13, and the induction needle 14 are spaced apart and disposed on the ignition device 10. Both the ignition needle 12 and the induction needle 14 penetrate and are exposed on two opposite surfaces of the ignition device 10, namely the upper and lower surfaces. The ground wire 13 is exposed on one surface of the ignition device 10. The axial directions of the three are parallel to each other and are all parallel to the axis of the gas cooker 200. One end of both the ignition needle 12 and the induction needle 14 is disposed close to the ground wire 13, and the other end of both is electrically connected to the power source through a wire. The gas conduit 15 is also disposed close to the ignition needle 12, the ground wire 13, and the induction needle 14. The gas conduit 15 also penetrates and is exposed on the upper and lower surfaces of the ignition device 10, and its axial direction is parallel to the axial direction of the ignition needle 12. An air outlet nozzle 151 is provided at the upper end of the gas conduit 15. The lower end is respectively communicated with the air and gas sources through pipes. And the ground wire 13 is disposed opposite to the air outlet nozzle 151. Generally, an air inlet 153 and an air intake 155 are provided at the lower end of the gas conduit 15. The air inlet 153 is communicated with the gas source through a pipe, and this pipe is the ignition pipe; the air intake 155 is communicated with the air through a blower. It can be understood that the gas enters the gas conduit 15 from the air inlet 153, and the air enters the gas conduit 15 from the air intake 155. The gas and the air are fully mixed in the gas conduit 15 and then sprayed out from the air outlet nozzle 151. The flameout protection control device 30 is disposed in the main pipe to control the gas flow or block the flow in the main pipe. And the flameout protection control device 30 is electrically connected to the induction needle 14 through a wire. Thus, when the gas equipment needs to perform an ignition operation, the power source is turned on and air and gas are introduced into the gas conduit 15. The air and the gas are mixed in the gas conduit 15, and the mixed gas is sprayed out from the air outlet nozzle. And after an electric spark is generated between the ignition needle 12 and the ground wire 13, it is ignited to form an ignition flame. The induction needle 14 senses the temperature of the ignition flame and feeds back the sensed temperature value signal to the flameout protection control device 30. As the ignition time extends, the induction needle 14 gradually turns red. When the temperature sensed by the induction needle 14 reaches a preset value, the flameout protection control device 30 controls the premixed gas in the main pipe to flow into the gas cooker 200. Under the ignition action of the ignition flame, the premixed gas flowing out of the main pipe burns to heat an object. If the ignition flame goes out, the temperature sensed by the induction needle 14 cannot reach the preset value, then the flameout protection control device 30 controls the premixed gas in the main pipe to block the flow, thereby cutting off the gas passage of the main pipe and playing a role in safety protection. Among them, the preset temperature is the temperature value at which the gas equipment can be ignited.

[0032] Therefore, it can be understood that in the technical solution of the present invention, the safety ignition system 100 of the gas equipment includes an ignition device 10 and a flameout protection control device 30. The ignition device 10 includes an ignition needle 12, a ground wire 13, an induction needle 14, and a gas conduit 15. The ignition needle 12 and the induction needle 14 are both used for electrical connection to a power source and are both arranged adjacent to the ground wire 13 and the gas conduit 15. The gas conduit 15 is used to be arranged in parallel with the main pipeline communicating with the premixed gas. One end of the gas conduit 15 is provided with an air outlet nozzle 151, and the other end is used to communicate with the air and the gas source, and the ground wire 13 is arranged opposite to the air outlet nozzle 151. At the same time, the flameout protection control device 30 is arranged on the main pipeline and is electrically connected to the induction needle 14 to control the flow or blockage of the premixed gas in the main pipeline. Thus, when an ignition operation is performed, the power source is turned on and gas and air are introduced into the gas conduit 15. The air and the gas are mixed in the gas conduit and then ejected from the air outlet nozzle 151. The mixture is ignited by the electric spark generated between the ignition needle 12 and the ground wire to form an ignition flame. The induction needle 14 senses the temperature of the ignition flame and feeds back the sensed temperature value signal to the flameout protection control device 30. As the ignition time prolongs, the induction needle 14 is gradually burned red. When the temperature sensed by the induction needle 14 reaches a preset value, the flameout protection control device 30 controls the flow of the premixed gas in the main pipeline. Under the ignition action of the ignition flame, the premixed gas flowing out of the main pipeline burns to heat an object. If the ignition flame goes out, the temperature sensed by the induction needle 14 cannot reach the preset value, then the flameout protection control device 30 controls the blockage of the flow of the premixed gas in the main pipeline, thereby cutting off the gas passage of the main pipeline and playing a role in safety protection. The safety ignition system 100 of the present invention can effectively overcome the safety hazards existing in the existing ignition system, thereby ensuring the safety of the ignition operation.

[0033] It should be noted that in order to better deliver the gas to the air inlet 153 of the gas conduit 15, a conveying device, such as a conveying pump, is provided in the pipeline connecting the gas source and the air inlet 153. Similarly, the air inlet 155 of the gas conduit 15 is connected to a blower 50 through a pipeline to quickly and effectively deliver the air into the gas conduit 15. In addition, a conveying device is also provided on the main pipe to quickly and effectively convey the premixed gas, and the conveying device can be a pump or a blower 50.

[0034] Please refer to Figures 4 to 6, in an embodiment of the invention, the ignition device 10 further includes a mounting bracket 11. The mounting bracket 11 is provided with a first mounting through hole 111, a second mounting through hole 112, a third mounting through hole 113 and a mounting hole 114. The ignition pin 12 is inserted and exposed at both open ends of the first mounting through hole 111. The induction pin 14 is inserted and exposed at both open ends of the second mounting through hole 112. The gas guide pipe 15 is inserted and exposed at both open ends of the third mounting through hole 113. The ground wire 13 is inserted and exposed at one open end of the mounting hole 114. The gas outlet nozzle 151 is disposed adjacent to the exposed end of the ground wire 13.

[0035] Specifically, the first mounting through hole 111, the second mounting through hole 112 and the third mounting through hole 113 all penetrate through the gas hood 200 along the axial direction of the gas hood 200, and are respectively used for mounting the ignition pin 12, the induction pin 14 and the gas guide pipe 15. The axial direction of the mounting hole 114 is also parallel to the axial direction of the gas hood 200, but does not penetrate through the gas hood 200, and is used for mounting the ground wire 13. It can be understood that both ends of the ignition pin 12, the induction pin 14 and the gas guide pipe 15 are exposed on the upper and lower surfaces of the mounting bracket 11. The ground wire 13 is only exposed on the upper surface of the mounting bracket 11. The upper end of the gas guide pipe 15 is provided with a gas outlet nozzle 151, and the gas outlet nozzle 151 is disposed adjacent to the ground wire 13. The lower end is provided with an air inlet 153 and an air intake 155, which are respectively used for connecting the gas and air. In this way, the gas and air respectively enter the gas guide pipe 15 through the air inlet 153 and the air intake 155, and are fully mixed and then sprayed out by the gas outlet nozzle 151. At this time, the ignition pin 12 ignites to form an ignition flame by burning the ground wire 13.

[0036] Further referring to Figure 1 and Figure 3 , the ignition pin 12 includes a main body portion 121 and an ignition portion 123. The main body portion 121 is inserted and exposed at both open ends of the first mounting through hole 111, and is electrically connected to a power source. The ignition portion 123 is disposed at one end of the main body portion 121 and extends bent towards the ground wire 13.

[0037] Specifically, the main body 121 is roughly columnar, and its outer contour size is adapted to the aperture of the first mounting through hole 111. The main body 121 is inserted into the first mounting through hole 111 and exposed at its upper and lower openings. The lower end of the main body 121 is connected to the power supply through a wire, and the upper end is provided with an ignition part 123, which is bent and extended toward the ground wire 13. In this way, when the ignition needle 12 is energized, the ignition part 123 discharges and generates an electric spark with the ground wire 13, and the gas ejected by the gas outlet nozzle 151 of the gas guide tube 15 encounters the electric spark and ignites to form an ignition flame. Bending and extending the ignition part 123 toward the ground wire 13 can make the ignition operation faster and more effective. The ground wire 13 and the center of the gas guide tube 15 are in the same straight line, and the ignition part 123 is arranged close to the ground wire 13, so that the ground wire 13 is located in front of the gas ejected from the gas outlet nozzle 151, which is more convenient for the ignition operation after the ejected gas generates an electric spark between the ground wire 13 and the ignition needle 12. Preferably, the end of the ignition part 123 away from the main body 121 abuts against the ground wire 13, so as to further make the ignition operation faster and more effective.

[0038] Preferably, the distance between the ground wire 13 and the gas outlet nozzle 151 is 10 mm, and the distance between the ignition part 123 and the ground wire 13 is 3-5 mm.

[0039] Further reading Figure 1 and Figure 4 The sensing needle 14 includes a connecting portion 141 and a sensing portion 143. The connecting portion 141 is plugged into and exposed at both end openings of the second mounting through hole 112 and is electrically connected to the power supply and the flameout protection control device 30. The sensing portion 143 is disposed at one end of the connecting portion 141 and is bent and extended toward the ground wire 13.

[0040] Specifically, the connecting portion 141 is roughly columnar, and its outer contour size is adapted to the aperture of the second mounting through hole 112. The connecting portion 141 is inserted into the second mounting through hole 112 and exposed at its upper and lower openings. The lower end of the connecting portion 141 is electrically connected to the power supply and the flameout protection control device 30 through a wire, and the upper end is connected to the sensing portion 143, which bends and extends toward the ground line 13. It can be understood that the sensing portion 143 is arranged close to the ground line, and is located on both sides of the ground line 13 with the ignition portion 123, so that the gas ejected by the gas outlet nozzle 151 burns to form an ignition flame after generating an electric spark between the ignition needle 12 and the ground line 13. The sensing portion 143 senses the temperature of the ignition flame and feeds back the sensed temperature value signal to the flameout protection control device 30. The sensing portion 143 is arranged close to the ground line 13, so that the temperature value of the ignition flame can be more accurately sensed, so that the flameout protection control device 30 can accurately control the operation and play a role in safe ignition.

[0041] See also Figures 4 to 6, in an embodiment of the present invention, the mounting bracket 11 is further provided with a first limiting hole 115 communicating with the first mounting through hole 111, a second limiting hole 116 communicating with the second mounting through hole 112, and a third limiting hole 117 communicating with the third mounting through hole 113; the ignition device 10 further includes a first fastener, a second fastener, and a third fastener; the first fastener is inserted into the first limiting hole 115 and abuts against the ignition pin 12; the second fastener is inserted into the second limiting hole 116 and abuts against the induction pin 14; the third fastener is inserted into the third limiting hole 117 and abuts against the air duct 15.

[0042] Specifically, the first limiting hole 115, the second limiting hole 116, and the third limiting hole 117 are all opened on the side wall of the mounting bracket 11 and respectively correspond to and communicate with the first mounting through hole 111, the second mounting through hole 112, and the third mounting through hole 113. The first fastener, the second fastener, and the third fastener are respectively inserted into the first limiting hole 115, the second limiting hole 116, and the third limiting hole 117 and respectively abut against the ignition pin 12, the induction pin 14, and the air duct 15 to enhance the installation stability of the ignition pin 12, the induction pin 14, and the air duct 15, thereby ensuring the rapid and effective progress of the ignition operation. It can be understood that the first limiting hole 115, the second limiting hole 116, and the third limiting hole 117 are all threaded holes, and the central directions of their holes are all perpendicular to the central line direction of the mounting through hole; the first fastener, the second fastener, and the third fastener are all screws and are respectively inserted into the first limiting hole 115, the second limiting hole 116, and the third limiting hole 117 to limit and fix the ignition pin 12, the induction pin 14, and the air duct 15, so as to effectively prevent the ignition pin 12, the induction pin 14, and the air duct 15 from shaking during the ignition operation and causing the ignition operation to not proceed smoothly.

[0043] Please refer to again Figure 2 and Figure 3 , in an embodiment of the present invention, the ignition device 10 further includes a protective cover 16, and the protective cover 16 covers the mounting bracket 11. The protective cover 16 is detachably mounted on the mounting bracket 11 and covers the ignition pin 12, the induction pin 14, the ground wire 13, and the air duct 15. Its detachable method is generally snap connection, which is convenient for the installation and removal operations of the protective cover 16. The setting of the protective cover 16 plays a good protective role for the ignition pin 12, the induction pin 14, the ground wire 13, and the air duct 15, thereby ensuring the smooth progress of the ignition operation.

[0044] Optionally, please refer to Figure 6 and Figure 7 , a limiting notch 118 is provided on the outer wall surface of the mounting bracket 11, and a plug-in portion 161 is provided on the side of the protective cover 16 facing the mounting bracket 11, and the plug-in portion 161 is inserted into the limiting notch 118.

[0045] Specifically, the limiting notch 118 is generally rectangular in shape and penetrates through the upper end surface of the installation. The insertion part 161 is also generally strip-shaped, and its size is adapted to the limiting notch 118. When the protective cover 16 is covered on the mounting frame 11, the insertion part 161 is inserted into the limiting notch 118 to ensure the stable installation of the protective cover 16. Of course, the shape of the limiting notch 118 can also be other reasonable shapes.

[0046] To further ensure the stable installation of the protective cover 16, a plurality of limiting notches 118 are provided. The plurality of limiting notches 118 are spaced apart along the circumference of the mounting frame 11. Similarly, a plurality of insertion parts 161 are correspondingly provided on the side of the protective cover 16 facing the mounting frame 11. When the protective cover 16 is covered on the mounting frame 11, one insertion part 161 is inserted into one limiting notch 118.

[0047] Please refer to Figure 5 and Figure 8 In an embodiment of the present invention, a flow guiding cap 157 is further provided at the upper end of the air guide pipe 15. The flow guiding cap 157 is provided with a flow guiding cavity 157a and a flow guiding port 157b communicating with the flow guiding cavity 157a. The flow guiding port 157b faces the ground wire 13, and the air outlet nozzle 151 is accommodated in the flow guiding cavity 157a. The setting of the flow guiding cap 157 can make the mixed gas ejected from the air outlet nozzle 151 flow out along the flow guiding port 157b towards the ground wire 13, thereby ensuring that the ignition operation is carried out more quickly and effectively. At the same time, it also enables the mixed gas ejected from the air outlet nozzle 151 to be used for ignition as much as possible, thereby improving the utilization efficiency of the mixed gas.

[0048] Please refer to again Figure 1 The flameout protection control device 30 includes a controller 31 and a solenoid valve 33. The solenoid valve 33 is arranged on the main pipeline. The controller 31 is electrically connected to the solenoid valve 33 and the induction needle 14. The controller 31 controls the on-off of the solenoid valve 33 according to the temperature of the induction needle 14 to control the on-off of the main pipeline. With such a setting, when an electric spark is generated between the ignition needle 12 and the ground wire 13 and the gas ejected from the air outlet nozzle 151 is ignited to form an ignition flame, the induction needle 14 senses the temperature of the ignition flame and feeds back the temperature value signal to the controller 31. If the sensed temperature value reaches the preset value, the controller 31 controls the solenoid valve 33 to open, so that the premixed gas in the main pipeline flows through and supplies gas to the gas burner 200. The gas burner 200 burns under the ignition of the ignition flame to heat an object. If the sensed temperature value does not reach the preset value, the controller 31 controls the solenoid valve 33 to close, cutting off the gas passage of the main pipeline and playing a safety protection role.

[0049] The present invention also provides a gas device, including a safety ignition system 100. The specific structure of the safety ignition system 100 refers to the above embodiments. Since this gas device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0050] Please refer to again Figure 2 and Figure 3 , the combustion system further includes a gas hood 200 and at least one burner head 300 provided on the gas hood 200. The ignition device 10 is installed on the gas hood 200 and is disposed adjacent to the burner head.

[0051] Specifically, the gas hood 200 is generally in the shape of a truncated cone. The ignition device 10 is fixedly installed on the gas hood 200. The fixed installation method can be an irreversible fixing method such as welding, or a detachable fixing method such as screw fixing or snap fixing. Moreover, the gas hood 200 is a hollow structure, forming a receiving cavity (not shown). The gas hood 200 has a relative air inlet end and an air outlet end. The air inlet end is provided with a gas inlet 210 communicating with the receiving cavity, and the air outlet end is provided with a gas outlet 220 communicating with the receiving cavity. The burner head 300 covers the gas outlet 220. The ignition device 10 is fixedly installed at the edge of the gas hood 200 and is disposed adjacent to the burner head 300. Thus, the premixed gas delivered by the blower 50 enters the receiving cavity through the gas inlet 210, then flows into the burner head 300 through the gas outlet 220, and finally is ejected from the burner head 300 and burns under the ignition of the ignition device 10 to heat an object.

[0052] In an embodiment of the present invention, the combustion system is a multi-head independent combustion system, that is, a plurality of burner heads 300 are provided, a plurality of gas outlets 220 are provided, and a flow dividing plate (not shown) is installed in the gas hood 200. One burner head 300 covers one gas outlet 220. Thus, the premixed gas is delivered by the blower 50 and enters the receiving cavity through the gas inlet 210. Through the flow dividing action of the flow dividing plate, the premixed gas in the receiving cavity is dispersed more evenly. The evenly dispersed premixed gas can respectively flow into the corresponding burner heads 300 through each gas outlet 220. Finally, the premixed gas is ejected from the corresponding burner heads 300 and burns under the ignition of the ignition device 10 to heat an object. When the multi-head independent combustion system burns, its flame is shorter, which can effectively heat an object, and its heat loss is greatly reduced, thereby achieving the purpose of energy saving. At the same time, because its flame is shorter, the impact force on the object to be heated is greatly reduced, and thus the noise generated during its operation is reduced, effectively improving the user experience.

[0053] The present invention also provides an ignition method, which is applied to the gas device as described above. The ignition method includes the following steps:

[0054] Turn on the power supply and introduce air and gas into the air guide pipe 15. After the air and gas are mixed, they are ejected from the air outlet nozzle 151 of the air guide pipe 15. The ejected mixed gas is ignited after an electric spark is generated between the ignition needle 12 and the ground wire 13 to form an ignition flame;

[0055] The induction needle 14 senses the temperature of the ignition flame and feeds back the temperature value signal to the flameout protection control device 30;

[0056] When the sensed temperature value reaches the preset value, the flameout protection control device 30 controls the flow of premixed gas in the main pipeline. The premixed gas is ejected from the gas hood 200 and burns under the ignition of the ignition flame.

[0057] Specifically, when an ignition operation is performed, turn on the power supply and open the air inlet 155 and the gas inlet 153. Air and gas flow into the air guide pipe 15 from the air inlet 155 and the gas inlet 153 respectively. After mixing, they are ejected from the air outlet nozzle 151. At this time, the ignition needle 12 discharges and generates an electric spark with the ground wire 13, and the ejected mixed gas is ignited by this electric spark to form an ignition flame; the induction needle 14 senses the temperature of the ignition flame and feeds back the temperature value signal to the flameout protection control device 30. As the ignition time prolongs, the induction needle 14 gradually turns red. When the temperature sensed by the induction needle 14 reaches the preset value, the flameout protection control device 30 controls the flow of premixed gas in the main pipeline. The premixed gas flows into the gas hood 200 from the gas inlet 210, then flows out from the gas outlet 220 and enters the burner head 300, and finally is ejected from the burner head 300. The premixed gas ejected from the burner head 300 burns under the ignition of the ignition flame to heat an object. If the ignition flame goes out, the temperature sensed by the induction needle 14 cannot reach the preset value, then the flameout protection control device 30 controls the premixed gas in the main pipeline to block the flow, thereby cutting off the gas passage of the main pipeline and playing a role in safety protection. The safety ignition system 100 of the present invention can effectively overcome the safety hazards existing in the existing ignition systems, thereby ensuring the safety of the ignition operation.

[0058] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A safety ignition system is applied to a gas device. The gas device includes a main pipeline communicating with premixed gas, a gas hood, and at least one burner disposed on the gas hood. It is characterized in that, The safety ignition system includes: An ignition device, installed on the gas cooker and disposed adjacent to the burner head; it includes an ignition needle, a ground wire, an induction needle and a gas duct. Both the ignition needle and the induction needle are used to be electrically connected to the power supply of the gas equipment and are both disposed adjacent to the ground wire and the gas duct. The gas duct is used to be arranged in parallel with the main pipeline. One end of the gas duct is provided with an air outlet nozzle, and the other end is used to connect air and the gas source. The ground wire is arranged opposite to the air outlet nozzle; it further includes a mounting bracket, and the mounting bracket is provided with a first mounting through hole, a second mounting through hole, a third mounting through hole and a mounting hole. The ignition needle is inserted and exposed at both open ends of the first mounting through hole, the induction needle is inserted and exposed at both open ends of the second mounting through hole, the gas duct is inserted and exposed at both open ends of the third mounting through hole, and the ground wire is inserted and exposed at one open end of the mounting hole; the air outlet nozzle is disposed adjacent to the exposed end of the ground wire, and A flameout protection control device, disposed on the main pipeline and electrically connected to the induction needle, for controlling the flow or blocking of the premixed gas in the main pipeline.

2. The safety ignition system according to claim 1, characterized in that, The ignition needle includes a main body portion and an ignition portion. The main body portion is inserted and exposed at both open ends of the first mounting through hole and is electrically connected to the power supply. The ignition portion is provided at one end of the main body portion and extends bent towards the ground wire; and / or, The induction needle includes a connecting portion and an induction portion. The connecting portion is inserted and exposed at both open ends of the second mounting through hole and is electrically connected to the power supply and the flameout protection control device. The induction portion is provided at one end of the connecting portion and extends bent towards the ground wire.

3. The safety ignition system according to claim 1, characterized in that, The mounting bracket is further provided with a first limiting hole communicating with the first mounting through hole, a second limiting hole communicating with the second mounting through hole and a third limiting hole communicating with the third mounting through hole; The ignition device further includes a first fastener, a second fastener and a third fastener; The first fastener is inserted into the first limiting hole and abuts against the ignition needle; the second fastener is inserted into the second limiting hole and abuts against the induction needle; the third fastener is inserted into the third limiting hole and abuts against the gas duct.

4. The safety ignition system according to claim 1, characterized in that, The ignition device further includes a protective cover, and the protective cover covers the mounting bracket.

5. The safety ignition system according to claim 4, characterized in that, A limiting notch is provided on the outer wall surface of the mounting bracket, and a plugging portion is provided on the side of the protective cover facing the mounting bracket. The plugging portion is inserted into the limiting notch.

6. The safety ignition system according to any one of claims 1 to 5, characterized in that, A flow guiding cap is further provided at the upper end of the gas duct. The flow guiding cap is provided with a flow guiding cavity and a flow guiding port communicating with the flow guiding cavity. The flow guiding port faces the ground wire, and the air outlet nozzle is accommodated in the flow guiding cavity.

7. The safety ignition system according to any one of claims 1 to 5, characterized in that, The flameout protection control device includes a controller and a solenoid valve. The solenoid valve is disposed on the main pipeline. The controller is electrically connected to the solenoid valve and the induction needle. The controller controls the on-off of the solenoid valve according to the temperature of the induction needle to control the on-off of the main pipeline.

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