Ignition rod and ignition device

Abstract

The utility model relates to an ignition rod and an ignition device, belonging to the technical field of electric heating devices. The ignition rod using the utility model includes an insulating shell, a silicon nitride heating element and two leads. Inside the insulating shell, the lead is connected to one end of the silicon nitride heating element; the other end of the silicon nitride heating element extends from the head end of the insulating shell to the outside of the insulating shell, and the two leads extend outward from the tail end of the insulating shell, and the leads and the tail end of the insulating shell are fixed to each other at the position of the chamfered platform. The ignition rod can complete the initial start-up ignition in 1 to 2 minutes, which takes a short time, ignites quickly, and does not generate a lot of smoke during the ignition process. It can be used indoors and is more suitable for scenarios that require long-term ignition, such as barbecue stove smoking mode.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating devices, in particular to the technical field of ignition rods, and specifically refers to an ignition rod and an ignition device. Background Art

[0002] The existing ceramic electric heating element has the characteristic of high heating temperature and is widely used as an ignition device in equipment such as barbecue stoves.

[0003] However, barbecue ovens using ceramic electric heating elements have a long ignition time problem. Usually, it takes 3 to 5 minutes to ignite the barbecue oven, and a large amount of smoke is generated during this period, making it impossible to use indoors.

[0004] Therefore, how to overcome the above-mentioned defects and provide a new type of ignition device with a short ignition time has become a problem to be solved urgently in the field. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide an ignition rod and an ignition device which can ignite quickly, does not generate a large amount of smoke during the ignition process, and can be used indoors.

[0006] In order to achieve the above-mentioned purpose, the ignition rod of the utility model has the following structure:

[0007] The ignition rod includes an insulating shell, a silicon nitride heating element and two lead wires. Inside the insulating shell, the two lead wires are connected to one end of the silicon nitride heating element; the other end of the silicon nitride heating element extends from the head end of the insulating shell to the outside of the insulating shell, and the two lead wires extend outward from the tail end of the insulating shell. The insulating shell is cylindrical, and a chamfered platform is provided at the tail end of the cylindrical insulating shell. The lead wires and the tail end of the insulating shell are fixed to each other at the position of the chamfered platform.

[0008] In the ignition rod, the insulating shell is a ceramic shell, and the firing temperature of the ceramic shell is 1500°C to 1650°C.

[0009] In the ignition rod, the two leads are both welded to the silicon nitride heating element, and the welding point is located inside the insulating shell.

[0010] The ignition rod also includes a sleeve, which is arranged on the inner side of the tail end of the insulating shell, and the two lead wires pass through the sleeve.

[0011] In the ignition rod, the cross section of the sleeve is in the shape of an "8", and includes two independent through holes, and the two lead wires pass through the two through holes respectively.

[0012] The ignition rod also includes a flange arranged on the outer side of the tail end of the insulating shell, and the two lead wires pass through and are fixed to the flange.

[0013] The utility model also provides an ignition device, including any one of the above-mentioned ignition rods, and also including a combustion chamber, the combustion chamber including a chamber wall, the chamber wall having an ignition hole, the ignition rod is arranged in the ignition hole, the silicon nitride heating element extends from the head end of the insulating shell to one end outside the insulating shell and is located on the inner side of the chamber wall, and the two leads extending outward from the tail end of the insulating shell are located on the outer side of the chamber wall.

[0014] In the ignition device, a combustible material placement hole is also opened on the chamber wall, and the combustible material is placed into the inner side of the chamber wall through the combustible material placement hole and is located above the silicon nitride heating element.

[0015] In the ignition device, the combustion chamber further comprises a bottom connected to the chamber wall, and a plurality of vents are provided on the chamber wall and / or the bottom.

[0016] The ignition rod using the utility model includes an insulating shell, a silicon nitride heating element and two leads. The two leads are connected to one end of the silicon nitride heating element in the insulating shell; the other end of the silicon nitride heating element extends from the head end of the insulating shell to the outside of the insulating shell, and the two leads extend outward from the tail end of the insulating shell, and the leads and the tail end of the insulating shell are fixed to each other at the position of the chamfered platform. The ignition rod can complete the initial start-up ignition in 1 to 2 minutes, which takes a short time, ignites quickly, and does not produce a lot of smoke during the ignition process. It can be used indoors and is more suitable for use scenarios that require long-term ignition, such as barbecue stove smoking mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the ignition rod of the utility model;

[0018] Figure 2 for Figure 1 A side view of the ignition rod in FIG.

[0019] Figure 3 The ignition rod of the utility model Figure 2 Cross-section of middle HH;

[0020] Figure 4 It is a structural schematic diagram of another embodiment of the ignition rod of the utility model;

[0021] Figure 5 It is a structural schematic diagram of a first embodiment of the ignition device of the utility model;

[0022] Figure 6This is a schematic structural diagram of a second embodiment of the ignition device of the utility model;

[0023] Figure 7 This is a schematic structural diagram of a third embodiment of the ignition device of the present utility model;

[0024] Figure 8 This is a schematic structural diagram of a fourth embodiment of the ignition device of the present utility model;

[0025] Fig. 9 This is a structural schematic diagram of a fifth embodiment of the ignition device of the utility model;

[0026] Fig.10 for Figure 5 Schematic diagram of the method of fixing the tail end of the insulating housing;

[0027] Fig.11 for Figure 6 Schematic diagram of the method of fixing the tail end of the insulating housing;

[0028] Fig.12 for Figure 7 Schematic diagram of the method of fixing the tail end of the insulating housing;

[0029] Fig.13 for Figure 8 Schematic diagram of the method of fixing the tail end of the insulating housing;

[0030] Fig.14 This is a schematic structural diagram of an ignition rod without a chamfered platform according to the utility model;

[0031] Fig.15 A schematic structural diagram of an ignition rod with an inner limiter according to the utility model;

[0032] Fig.16 A schematic diagram of the structure of an ignition rod using a thinner silicon nitride heating element according to the present invention;

[0033] Fig.17 for Fig.16 Schematic diagram of the structure of the silicon nitride heating element.

[0034] Reference numerals:

[0035] Insulating shell 1, silicon nitride heating element 2, lead 3, inner sleeve 4, combustion chamber 5, ignition hole 6, combustible material placement hole 7, vent 8, hexagonal nut 9, flange edge 10, 90° fixing plate 11, screw 12, sleeve 13, chamfered platform 14, inner limit 15. DETAILED DESCRIPTION

[0036] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0037] See also Figure 1 Shown is a schematic structural diagram of the ignition rod of the utility model.

[0038] In one embodiment, the ignition rod, such as Figures 1 to 4 As shown, it includes an insulating shell 1, a silicon nitride heating element 2 and two lead wires 3. Inside the insulating shell 1, the two lead wires 3 are connected to one end of the silicon nitride heating element 2; the other end of the silicon nitride heating element 2 extends from the head end of the insulating shell 1 to the outside of the insulating shell 1, and the two lead wires 3 extend outward from the tail end of the insulating shell 1. The insulating shell 1 can be cylindrical, and a chamfered platform 14 is provided at the tail end of the cylindrical insulating shell 1. The lead wires 3 and the tail end of the insulating shell 1 are fixed to each other at the position of the chamfered platform 14 by screws. In an alternative embodiment, as Fig.14 As shown, the chamfered platform 14 may not be provided at the tail end of the cylindrical insulating housing 1, and the lead wire 3 and the tail end of the insulating housing 1 may also be fixed to each other by screws.

[0039] The two leads 3 are made of high-temperature wires and are welded to the silicon nitride heating element 2, and the welding point is located inside the insulating shell 1. The firing temperature of the silicon nitride heating element 2 is between 1700°C and 2000°C, preferably at 1800°C. The silicon nitride heating element 2 is resistant to high temperatures of 1500°C. The insulating shell 1 is an alumina ceramic shell, and its firing temperature is between 1500°C and 1650°C, preferably at 1550°C, and is resistant to high temperatures of 1250°C. The ceramic shell has better insulation and can maintain good insulation in a long-term high-temperature environment, thereby ensuring the safety of the ignition rod.

[0040] like Figure 3 and Figure 4 As shown, the ignition rod further comprises an inner sleeve 4, which is arranged inside the tail end of the insulating shell 1, and the two lead wires 3 pass through the inner sleeve 4. The cross section of the inner sleeve 4 can be circular,

[0041] The inner sleeve 4 is oval or "8" shaped, and the "8" shaped cross section includes two independent through holes. Figure 1 In the case of the oval or circular shape shown, the two leads 3 can be easily passed through the inner sleeve 4 during production; Figure 4 In the case of the "8"-shaped cross section shown, the two leads 3 pass through two through holes respectively. At the same time, when the "8"-shaped cross section is adopted, the wall thickness of the inner sleeve 4 is increased, thereby improving the stability when the inner sleeve 4 is fixedly connected to the insulating shell 1, especially preventing damage to the insulating shell 1 when screws are used.

[0042] In a further preferred embodiment, the ignition rod further comprises a flange disposed outside the rear end of the insulating housing 1, and the two lead wires 3 pass through and are fixed to the flange. The positional relationship between the lead wires 3 and the silicon nitride heating element 2 and the insulating housing 1 can be fixed by screws or by flanges.

[0043] The utility model also provides an ignition device. In one embodiment, Figure 5 and Fig.10 As shown, it includes the above-mentioned ignition rod and a combustion chamber 5, the combustion chamber 5 includes a chamber wall, the chamber wall has an ignition hole 6, the ignition rod outer sleeve is provided with a sleeve 13 and is arranged in the ignition hole 6, the silicon nitride heating element 2 extends from the head end of the insulating shell 1 to the end outside the insulating shell 1 and is located on the inner side of the chamber wall, that is, located in the combustion chamber 5, and the two lead wires 3 extend outward from the tail end of the insulating shell 1 and are located on the outer side of the chamber wall, that is, located outside the combustion chamber 5. The two lead wires 3 are fixed to the tail end of the insulating shell 1 by a hexagonal nut 9.

[0044] The chamber wall is also provided with a combustible material placement hole 7, through which the combustible material is placed into the inner side of the chamber wall and is located above the silicon nitride heating element 2.

[0045] The combustion chamber 5 further comprises a bottom connected to the chamber wall, and a plurality of vents 8 are provided on the chamber wall and / or the bottom.

[0046] In other embodiments, the lead wire 3 and the tail end of the insulating housing 1 may be fixed by other means. Figure 6 and Fig.11 As shown, the ignition rod outer shell is provided with a sleeve 13, and the sleeve 13 is fixed to the rear end of the insulating shell 1 by abutting screws 12. Figure 7 and Fig.12 In the structure shown, a 90° fixing piece 11 is provided at the rear end of the insulating housing 1, and the 90° fixing piece 11 is fixed to the rear end of the insulating housing 1 by screws 12.

[0047] like Figure 8 and Fig.13 In another embodiment of the ignition device shown, a flange 10 is provided at the rear end of the insulating housing 1, and the lead 3 is fixed to the rear end of the insulating housing 1 through the flange 10. The flange 10 and the insulating housing 1 are abutted and fixed by screws 12, and the sleeve 13 is located between the flange 10 and the rear end of the insulating housing 1.

[0048] In such Fig. 9In another embodiment of the ignition device shown, it only includes a sleeve 13 , and the ignition rod is arranged in the sleeve 13 and passes through the ignition hole 6 on the wall of the combustion chamber 5 .

[0049] In the above embodiments, various fixing methods of the lead wire 3 and the tail end of the insulating housing 1 are introduced. Fig.15 As shown, the insulating shell 1 is provided with an inner limit 15 at the periphery of the head end extending outward from the silicon nitride heating element 2, and the position of the ignition rod can be fixed from the inside of the combustion chamber 5 through the inner limit 15, making the position more stable.

[0050] In other alternative embodiments, Fig.16 and Fig.17 As shown, a thinner silicon nitride heating element 2 can be used compared to the previous embodiment. The thinner silicon nitride heating element 2 heats faster and can complete the ignition process faster. On the other hand, the thicker silicon nitride heating element 2 has higher strength and longer service life. It can be applied to different specific ignition devices as needed.

[0051] In the application of the utility model, taking the ignition device with the ignition rod of the utility model as an example, the tail ends of the two leads can be connected to a variety of external power supplies as needed to form a loop, and the power supply can be designed as DC 12V, 20V, 24V, 36V, 110V~120V or 200V~250V. And a variety of powers can be used according to the application scenario. The combustible particles are placed in the combustion chamber through the combustible insertion hole, and then the power is turned on. The silicon nitride heating element heats up after being powered on. The initial start-up ignition can be completed in about 6 to 12 seconds. The speed is fast, and the ignition process does not produce a lot of smoke. The ignition device is suitable for most existing barbecue stoves, carbon stoves, gas stoves, etc., and can also be used for the ignition of various gas household appliances such as hydrogen energy combustion batteries, gas air conditioner ignition, gas stoves, gas water heaters, gas ovens, gas dryers, etc., to replace the traditional pulse ignition method. Compared with pulse ignition, the ignition rod and ignition device of the utility model do not have electromagnetic interference and are safer to use.

[0052] When the ignition device of the utility model is applied to most existing barbecue grills, the barbecue grills can be made more suitable for indoor use. On the other hand, the ignition rod has good temperature stability and fast compensation temperature response speed, and is particularly suitable for modes such as smoking mode. At the same time, the ignition rod is safer, high temperature resistant, no leakage, better insulation performance, and longer service life. The combustion chamber has a simple structure, making the barbecue grill easier to clean and more hygienic.

[0053] The ignition rod using the utility model includes an insulating shell, a silicon nitride heating element and two leads. The two leads are connected to one end of the silicon nitride heating element in the insulating shell; the other end of the silicon nitride heating element extends from the head end of the insulating shell to the outside of the insulating shell, and the two leads extend outward from the tail end of the insulating shell, and the leads and the tail end of the insulating shell are fixed to each other at the position of the chamfered platform. The ignition rod can complete the initial start-up ignition in 1 to 2 minutes, which takes a short time, ignites quickly, and does not produce a lot of smoke during the ignition process. It can be used indoors and is more suitable for use scenarios that require long-term ignition, such as barbecue stove smoking mode.

[0054] In this specification, the utility model has been described with reference to its specific embodiments. However, it is obvious that various modifications and changes can be made without departing from the spirit and scope of the utility model. Therefore, the description and drawings should be regarded as illustrative rather than restrictive.

Claims

1. An ignition rod, characterized in that: It includes an insulating shell, a silicon nitride heating element and two leads. Inside the insulating shell, the two leads are connected to one end of the silicon nitride heating element; the other end of the silicon nitride heating element extends from the head end of the insulating shell to the outside of the insulating shell, and the two leads extend outward from the tail end of the insulating shell. The insulating shell is cylindrical, and a chamfered platform is provided at the tail end of the cylindrical insulating shell. The leads and the tail end of the insulating shell are fixed to each other at the position of the chamfered platform.

2. The ignition rod according to claim 1, characterized in that: The insulating shell is a ceramic shell, and the firing temperature of the ceramic shell is 1500°C to 1650°C.

3. The ignition rod according to claim 1, characterized in that: The two leads are both welded to the silicon nitride heating element, and the welding points are located inside the insulating shell.

4. The ignition rod according to claim 1, characterized in that: It also includes a sleeve, which is arranged on the inner side of the tail end of the insulating shell, and the two lead wires pass through the sleeve.

5. The ignition rod according to claim 4, characterized in that: The cross section of the sleeve is in the shape of an "8", and includes two independent through holes, and the two lead wires pass through the two through holes respectively.

6. The ignition rod according to claim 4, characterized in that: It also includes a flange arranged on the outside of the tail end of the insulating shell, and the two lead wires pass through and are fixed to the flange.

7. An ignition device, characterized in that: The ignition rod comprises the ignition rod as described in any one of claims 1 to 6, and also comprises a combustion chamber, the combustion chamber comprises a chamber wall, the chamber wall has an ignition hole, the ignition rod is arranged in the ignition hole, the silicon nitride heating element extends from the head end of the insulating shell to one end outside the insulating shell and is located on the inner side of the chamber wall, and the two leads extend outward from the tail end of the insulating shell and are located on the outer side of the chamber wall.

8. The ignition device according to claim 7, characterized in that: The chamber wall is also provided with a combustible material placement hole, through which the combustible material is placed into the inner side of the chamber wall and is located above the silicon nitride heating element.

9. The ignition device according to claim 8, characterized in that: The combustion chamber further comprises a bottom connected to the chamber wall, and a plurality of vents are provided on the chamber wall and / or the bottom.

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