Side pilot for a burner head and gas burner head

Abstract

The utility model relates to a side fire device for furnace head, including ignition head, ignition needle and inductive needle, ignition needle and inductive needle are located two sides of ignition head respectively, the upper portion of ignition head has a cylindrical shower nozzle, the shower nozzle is arranged in a circular pit, the lateral wall of shower nozzle is provided with a plurality of injection holes that are annularly arranged, the top surface of shower nozzle is provided with a pair of combustion holes, the inductive needle has a probe that extends horizontally to the upper side of the combustion hole, and the probe is adapted to contact the flame generated by the combustion hole. The utility model can accurately detect whether the flame is extinguished regardless of the pressure of the combustible gas source, thereby effectively improving the accuracy of the flameout protection and the safety of the gas equipment.

Description

Technical Field

[0001] This utility model relates to the field of gas equipment technology, and in particular to a side ignition device for a burner head and a gas burner head. Background Technology

[0002] The burner head is the most crucial component of a gas appliance, typically determining its power output and gas utilization rate. Existing burners, especially those in commercial gas appliances, usually have a constant-flame device installed beside or inside the burner to provide ignition and flameout protection. The ignition function allows for easy shut-off of the main gas supply, while enabling it to be turned on again when needed. The constant-flame device ignites the main gas, ensuring combustion within the burner without frequent ignition, making operation both safe and quiet. The flameout protection function automatically shuts off the main gas supply when the constant-flame device goes out, preventing gas leakage due to lack of ignition. This avoids potential hazards caused by gas leaks.

[0003] Chinese Patent No. 201920595988.9 discloses a safe ignition system and a gas appliance. The safe ignition system includes an ignition device and a flameout protection control device, wherein, for example... Figure 1 As shown, the ignition device includes an ignition needle 1, a ground wire 2, a sensing needle 3, and a gas guide tube. Both the ignition needle 1 and the sensing needle 3 are electrically connected to the power supply of the gas equipment and are located adjacent to the ground wire 2 and the gas guide tube. One end of the gas guide tube is equipped with a gas outlet nozzle 4, and the other end is connected to the gas source. A flow guide cap 5 is also provided at the upper end of the gas guide tube. The flow guide cap 5 has a flow guide cavity 51 and a flow guide port 52 connecting to the flow guide cavity 51. The gas outlet nozzle 4 is housed within the flow guide cavity 51 and is aligned with the gap between the ignition needle and the sensing needle. The sensing needle 3 has a fixing part, from which a temperature sensing part extends laterally. This temperature sensing part extends into the gap and can just contact the flame generated by the gas outlet nozzle 4, thereby achieving the purpose of determining whether the ignition device has extinguished.

[0004] The structure of the aforementioned prior art has the following defects:

[0005] Currently, the sensing needle 3 used in gas appliances is mainly a plasma sensing needle, whose working principle is based on the physical characteristics of flame ionization. When gas burns, the flame ionizes the surrounding air, generating plasma containing positive ions and electrons. These charged particles form a microcurrent (approximately 1uA) under the influence of an electric field, and the flameout protection device determines the flame state by detecting this current. In the aforementioned prior art, the temperature sensing part of the sensing needle 3 is arranged laterally to detect the flame state of the gas nozzle 4. Because the length of the flame changes significantly when the gas source pressure changes: when the gas source pressure is high, the flame is longer and may detach, if the temperature sensing part of the sensing needle 3 is too close to the gas nozzle 4, the sensing needle 3 will not reach the root of the flame, thus failing to contact the flame. If the temperature sensing part is located slightly further away from the gas nozzle 4, when the gas source pressure is low and the flame is short, the temperature sensing part will also fail to contact the flame. These two situations will cause the sensing needle 3 to be unable to detect the true state of the flame in real time, thus making it impossible to determine whether the flame is extinguished. Consequently, it will be impossible to prevent the gas stove from being shut off due to misjudgment by the flameout protection device, which would affect the normal use of the gas stove. Utility Model Content

[0006] Therefore, it is necessary to provide a side ignition device and a gas burner head to solve the defects in the prior art. By accurately detecting the flame status of the side ignition device, the flameout protection of the gas equipment can be made more accurate, thereby improving the safety of the gas equipment.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution.

[0008] This utility model provides a side ignition device for a stove head, the stove head including a stove body, a combustion chamber disposed within the stove body, and the side ignition device disposed beside the combustion chamber; the side ignition device includes an ignition head, an ignition needle, and a sensing needle, the ignition needle and the sensing needle being located on opposite sides of the ignition head, the upper part of the ignition head having a cylindrical nozzle disposed within a circular recess, and the side wall of the nozzle having a plurality of injection holes arranged in a ring; the lower part of the ignition head having a gas pipe, the ignition head being adapted to eject combustible gas introduced from the gas pipe through the plurality of injection holes and ignited by the ignition needle; the top surface of the cylindrical nozzle having a secondary combustion hole, and the sensing needle having a probe extending laterally above the secondary combustion hole, the flame generated by the secondary combustion hole being adapted to contact the probe.

[0009] Preferably, there is an annular gap between the nozzle and the sidewall of the recess, and the probe extends through the annular gap to the top of the secondary combustion hole.

[0010] Preferably, the annular gap is connected to the combustion chamber through a slit, and the flame ejected from at least one injection hole is adapted to be injected into the combustion chamber through the slit and ignite the combustible gas in the combustion chamber.

[0011] Preferably, the plurality of injection holes includes at least one first injection hole and the rest are second injection holes, wherein the diameter of the first injection hole is larger than that of the second injection holes.

[0012] Preferably, at least one of the first injection holes is aligned with the cut groove.

[0013] Preferably, the bottom of the circular recess is provided with a drainage hole, and the plurality of spray holes are higher than the drainage hole.

[0014] Preferably, the side ignition device further includes a protective cover disposed above the ignition head, ignition needle and sensing needle, the protective cover having an opening facing the interior of the combustion chamber.

[0015] This utility model also provides a gas burner head, including a furnace body and a burner. A cylindrical combustion chamber is provided in the furnace body, the burner is disposed in the combustion chamber, and a side ignition device is disposed on the side of the combustion chamber. The side ignition device is the side ignition device described above.

[0016] This invention features a cylindrical nozzle at the top of the ignition head, with a secondary combustion hole on the top surface of the nozzle. A probe extending laterally above the secondary combustion hole is mounted on the sensing needle. When the secondary combustion hole is burning, the probe is above the flame and can directly contact it. This ensures that the sensing needle can accurately detect whether the flame is extinguished, regardless of the pressure of the combustible gas source. This prevents the flameout protection device from making incorrect judgments, effectively improving the accuracy of flameout protection and the safety of gas equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an ignition device in the prior art;

[0018] Figure 2 This is a schematic diagram of the overall structure of the side ignition device in this embodiment.

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle;

[0020] Figure 4 This is a cross-sectional view of the side ignition device in Embodiment 1.

[0021] Figure 5 This is a schematic diagram of another structure of the side ignition device in this embodiment.

[0022] The purpose of this utility model, as well as its functions and principles, will be further explained in conjunction with the accompanying drawings in specific embodiments. Detailed Implementation

[0023] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details.

[0024] Example 1:

[0025] like Figure 2-4 As shown, this embodiment provides a side ignition device 1 for a stove head 100, including an ignition head 1, an ignition needle 12 and a sensing needle 13. The ignition head 11 is used to generate a flame through combustion, the ignition needle 12 is used to ignite the ignition head 11, and the sensing needle 13 is used to sense whether the ignition head 11 is burning normally and output a sensing signal. The ignition needle 12 and the sensing needle 13 are fixedly disposed on both sides of the ignition head 11. The upper part of the ignition head 11 has a cylindrical nozzle 111, which is disposed in a circular recess 14. The side wall of the nozzle 111 has a plurality of injection holes 112 arranged in a ring, which are all connected to the interior for spraying combustible gas. The lower part of the ignition head 11 has a gas pipe 113, which is connected to a combustible gas source. The ignition head 11 is adapted to spray combustible gas introduced from the gas pipe 113 through the plurality of injection holes 1112, and ignite it by the ignition needle 12. The side wall of the circular recess 14 is adapted to reflect the flames sprayed from the plurality of injection holes 112, so that the flames are focused upward and burn the sensing needle 13. The nozzle 112 has a secondary combustion hole 114 on its top surface, and the sensing needle 13 has a probe 131 that extends laterally above the secondary combustion hole 114. The probe 131 is adapted to detect the flame generated by the secondary combustion hole.

[0026] Because the sensing needle 13 extends above the recess 14 and the secondary combustion hole 114, regardless of the pressure of the combustible gas in the ignition head 11 or the length of the flame it produces, the sensing needle 13 can contact and detect the flame above the recess 14 and / or the secondary combustion hole 114. This effectively increases the sensing area of ​​the sensing needle 13, thus enhancing its reliability. Furthermore, since there is no need to consider the installation angle of the sensing needle 13, the problem of determining its installation position and angle, common in existing technologies, is eliminated.

[0027] Reference Figure 5As shown, in this embodiment, the burner head 100 also includes a furnace body 2. The side ignition device 1 has a mounting platform 15, and the circular recess 14 is a countersunk hole recessed downward from the upper surface of the mounting platform 15. The furnace body 2 has a combustion chamber 21, in which a burner 3 is installed, and combustible gas (referred to herein as "main gas") is introduced through a main pipe. The aforementioned side ignition device 1 is used to ignite the combustible gas in the burner 3. The sensing needle 13 is connected to an external flameout protection device through a wire. The flameout protection device is used to open or close the main gas according to the flame state detected by the sensing needle 13, so as to avoid the danger of gas leakage when the side ignition head device 1 is extinguished because the main gas is not closed and the burner 3 is not ignited.

[0028] In this embodiment, the diameter of the circular recess 14 is larger than the diameter of the nozzle 111, forming an annular gap 16 between the circular recess 14 and the nozzle 111 (e.g., ...). Figure 4 As shown, the annular gap 16 can provide a more stable combustion zone for the flame at the injection hole 112, making the flame more stable. At the same time, the probe 131 of the sensing needle 13 extends above the annular gap 16, and can burn the sensing needle 13 regardless of whether the flame ejected from the ignition head 11 is long or short, thereby effectively detecting the state of the flame at the ignition head 11, so as to provide a reliable current signal for the flameout protection device and improve the reliability of the side ignition device 1.

[0029] Furthermore, this embodiment also provides a slit 17 between the annular gap 16 and the combustion chamber 21 to connect the annular gap 16 and the combustion chamber 21. At least one injection hole 112 ejects a flame that is adapted to pass through this slit 17 into the combustion chamber 21 and ignite the combustible gas within the burner 3. Since the flame can enter the burner 3 along a surface lower than the mounting platform 15, the height of the gas burner head 100 using the side ignition device 1 of this embodiment can be significantly reduced. Compared to traditional similar products, this gas burner head 100 not only saves on manufacturing costs but also has a more aesthetically pleasing appearance and is more likely to be favored by users.

[0030] To propel the flame further, this embodiment provides at least one first injection hole 1121 among the aforementioned plurality of injection holes 112, while the rest are second injection holes 1122 (e.g., ...). Figure 4 As shown in the diagram, the diameter of the first injection hole 1121 is larger than that of the second injection hole 1122, and at least one of the first injection holes 1121 is aligned with the aforementioned groove 17. In this way, more flame can be injected into the combustion chamber from the groove, making the ignition of the burner head smoother and more reliable.

[0031] In this embodiment, the ignition head 11 is made of metal, and the end of the ignition needle 12 extends above the nozzle 111. The nozzle 111 can be directly used as a grounding electrode, and the nozzle 111 can be used to draw an electric arc from the ignition needle 12 to achieve ignition without the need for additional grounding components.

[0032] The side-ignition device 11 in this embodiment also includes a protective cover 18 disposed above the ignition head 11, the ignition needle 12, and the sensing needle 13. The protective cover 18 has an opening 181 facing the burner 3. This protective cover 18 provides a windless combustion environment for the ignition head 11 and also blocks water, oil, and food scraps that fall during cooking, preventing them from clogging the injection hole 112. The opening 181 directs the flame generated by the ignition head 11 to the top of the burner 3, igniting the burner 3 and causing the combustible gas to burn within it.

[0033] To further prevent the spray hole 112 from being blocked by oil or water, this embodiment also provides a drain hole 19 at the bottom of the circular recess 14 (e.g., Figure 3 As shown), the spray hole 112 is made higher than the drain hole 19 so that the oil and water can be discharged in time.

[0034] With the above structure, this embodiment can make the detection results of the sensing needle 13 more realistic and accurate, and will not cause the sensing needle 13 to fail to contact the flame due to changes in the pressure of the gas source, thereby avoiding the situation where the flameout protection device erroneously shuts off the main gas due to the sensing needle 13 failing to detect the flame.

[0035] Example 2:

[0036] This embodiment provides a gas burner head, including a furnace body and a burner. A cylindrical combustion chamber is disposed within the furnace body, and the burner is located within the combustion chamber. A side ignition device is disposed beside the combustion chamber; this side ignition device is the same as the one described in Embodiment 1. This gas burner head also avoids the problem of inaccurate detection by the sensing needle 13 due to changes in gas source pressure, thereby preventing the flameout protection device from erroneously shutting off the main gas supply.

[0037] In summary, this invention sets the upper part of the ignition head as a cylindrical nozzle, with a secondary combustion hole on the top surface of the nozzle. A probe extending laterally above the secondary combustion hole is provided on the sensing needle. When the secondary combustion hole is burning, the probe is above the flame and can directly contact the flame. This allows the sensing needle to accurately detect whether the flame is extinguished, regardless of the pressure of the combustible gas source. This prevents the flameout protection device from making incorrect judgments, effectively improving the accuracy of flameout protection and the safety of gas equipment.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A side-ignition device for a stove head, the stove head comprising a stove body, a combustion chamber disposed within the stove body, the side-ignition device being disposed beside the combustion chamber; the side-ignition device comprising an ignition head, an ignition needle, and a sensing needle, characterized in that: The ignition needle and the sensing needle are located on opposite sides of the ignition head. The upper part of the ignition head has a cylindrical nozzle, which is disposed in a circular recess. The side wall of the nozzle has multiple injection holes arranged in a ring. The lower part of the ignition head has a gas pipe. The ignition head is adapted to eject combustible gas introduced from the gas pipe through the multiple injection holes and ignite it by the ignition needle. The top surface of the nozzle has a secondary combustion hole. The sensing needle has a probe that extends laterally above the secondary combustion hole. The probe is adapted to contact the flame generated by the secondary combustion hole.

2. The side-ignition device as described in claim 1, characterized in that: There is an annular gap between the nozzle and the sidewall of the recess, and the probe extends through the annular gap to the top of the secondary combustion hole.

3. The side-ignition device as described in claim 2, characterized in that: The annular gap is connected to the combustion chamber by a slit, and the flame ejected from at least one injection hole is adapted to be injected into the combustion chamber through the slit and ignite the combustible gas in the combustion chamber.

4. The side-ignition device as described in claim 3, characterized in that: The plurality of injection holes includes at least one first injection hole and the rest are second injection holes, wherein the diameter of the first injection hole is larger than that of the second injection holes.

5. The side-ignition device as described in claim 4, characterized in that: At least one of the first injection holes is aligned with the cut groove.

6. The side-ignition device as described in claim 1, characterized in that: The bottom of the circular recess is provided with a drainage hole, and the spray hole is higher than the drainage hole.

7. The side-ignition device as described in any one of claims 1 to 6, characterized in that: The side ignition device also includes a protective cover disposed above the ignition head, ignition needle and sensing needle, the protective cover having an opening facing the interior of the combustion chamber.

8. A gas-fired burner head, comprising a furnace body and a burner, wherein a cylindrical combustion chamber is disposed within the furnace body, the burner is disposed within the combustion chamber, and a side ignition device is disposed beside the combustion chamber, characterized in that, The side-ignition device is the side-ignition device as described in any one of claims 1-7.

Images