Wall-hanging stove ignition feedback needle assembly

Abstract

The utility model belongs to the technical field of ignition feedback needle assemblies of wall-hanging stoves. The assembly comprises a feedback needle, an ignition needle a, an ignition needle b, a fixing plate, a mounting plate and an insulating ceramic plate. The fixing plate and the mounting plate are fixedly connected to jointly clamp and fix the insulating ceramic plate to prevent the insulating ceramic plate from moving back and forth, and rotation of the insulating ceramic plate is limited through the ceramic fixing groove. The insulating ceramic plate is provided with through holes for the three pins to pass through, and the front and rear ends of the three pins are respectively exposed out of the mounting plate and the fixing plate. The design ensures that the insulating ceramic plate is stably fixed in all directions and does not loosen or move, so that ignition and feedback abnormity are avoided. In addition, the assembly can resist the influence of external force in the processes of installation, transportation and the like, the ignition needle and the feedback needle are prevented from moving, and normal operation of the ignition feedback needle assembly is further ensured.

Description

Technical Field

[0001] This utility model belongs to the field of wall-hung boiler technology, specifically relating to the ignition feedback needle assembly of a wall-hung boiler. Background Technology

[0002] A wall-hung boiler is short for gas-fired wall-hung boiler, also known as a "gas-fired wall-mounted heating boiler." It is a type of water heater that uses natural gas as its energy source and features multiple safety protection measures, including anti-freeze protection, anti-dry-burning protection, accidental flameout protection, overheat protection, and water pump anti-seize protection. Wall-hung boilers can be connected to external indoor thermostats to achieve personalized temperature adjustment and energy saving. Functionally, most wall-hung boilers provide both heating and hot water, but some only offer heating, primarily used in colder northern regions. The working principle of a wall-hung boiler is as follows: When the ignition switch is activated, the fan starts first, creating a negative pressure difference in the combustion chamber. The air pressure switch sends a command to the water pump, which then starts. The water flow switch sends a command to the high-voltage igniter, which in turn sends a command to the gas proportional valve, initiating its operation. The gas proportional valve, air pressure switch, and flue gas sensor switch are interlocked. The combustion chamber has a certain negative pressure for the gas to work. When the flue gas sensor switch does not detect any exhaust gas for 5 seconds, it cuts off the gas proportional valve to stop the gas supply, thus ensuring safe use of gas.

[0003] In the ignition system of a wall-hung boiler, the ignition feedback needle assembly plays a crucial role. For example, Chinese patent CN207006358U discloses an ignition device for a wall-hung boiler with flame detection function. However, the existing ignition feedback needle assembly structure presents problems with the stability and safety of the boiler. Specifically, in the prior art, the ceramic part of the ignition feedback needle is directly welded to the metal fixing component. While this welding method seems simple, the welding process is difficult due to the different materials of ceramic and metal, easily leading to poor welding conditions such as incomplete welds. Once welding problems occur, the ceramic part may loosen, affecting the normal operation of the ignition feedback needle. Furthermore, when the ignition feedback needle is subjected to excessive external force, the ceramic part may also loosen. In this case, the ignition feedback needle will be unable to be fixed and may be pulled out vertically or rotated 360° horizontally. Such displacement and rotation can cause abnormal ignition and feedback signals, thus affecting the normal combustion of the boiler. Even more seriously, in the prior art, two ignition needles and one feedback needle are typically encased in three ceramic pieces and welded to the metal fixing component. With this design, if the ceramic part of even one of the needles becomes loose, the entire ignition feedback system will malfunction. This not only reduces the reliability of the wall-hung boiler but also causes significant inconvenience to users. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an ignition feedback needle assembly, comprising a feedback needle, an a-ignition needle, a b-ignition needle, a fixing plate, a mounting plate, and an insulating ceramic plate. The fixing plate and the mounting plate are fixedly connected, clamping and fixing the insulating ceramic plate, and restricting its forward and backward movement. A ceramic fixing groove is formed between the fixing plate and the mounting plate, used to fix and install the insulating ceramic plate and to limit its rotation. A through hole is provided on the insulating ceramic plate, through which the feedback needle, the a-ignition needle, and the b-ignition needle pass. The front and rear ends of the feedback needle, the a-ignition needle, and the b-ignition needle are exposed relative to the mounting plate and the fixing plate, respectively.

[0005] The ignition feedback needle assembly includes a feedback needle, an a-ignition needle, a b-ignition needle, a fixing plate, a mounting plate, an insulating ceramic plate, mounting positioning holes, fixing connection points, and a ceramic fixing groove. It also includes a feedback end located at the rear end of the feedback needle, an a-ignition needle end located at the rear end of the a-ignition needle, and a b-ignition needle end located at the end of the b-ignition needle. The feedback needle, a-ignition needle, and b-ignition needle provide ignition and feedback signals. The front ends of these three needles protrude from the front side of the mounting plate, and their middle sections are encased in a single-piece insulating ceramic plate, which fixes them to the plate. The fixing plate, mounting plate, and insulating ceramic plate each have corresponding circular through holes for the feedback needle, a-ignition needle, and b-ignition needle to pass through and for securing them. The insulating ceramic plate, from front to back, consists of a front sleeve, a positioning block, and a rear sleeve, all of which are integral structures. The front and rear sleeves are roughly cylindrical, while the positioning block is roughly rectangular. The front ends of the feedback needle, ignition needle A, and ignition needle B protrude forward relative to the front sleeve, while the ends of the feedback end, ignition needle A, and ignition needle B protrude backward relative to the rear sleeve. The positioning block is positioned on the ceramic fixing groove on the mounting plate to prevent the insulating ceramic plate from rotating. Furthermore, the mounting plate and fixing plate clamp the insulating ceramic plate between them, preventing it from moving back and forth. The three cylindrical front sleeves fit perfectly into the three circular through holes of the fixing plate and are welded at high temperature using solder. The positioning block is pressed tightly against one side of the fixing plate, and one end of the positioning block, as well as its left and right ends, are pressed tightly against three sides of the mounting plate. Figure 4 The three sides of the ceramic mounting groove are shown by the markings; the three rear sleeves at the end of the insulating ceramic plate pass through the circular through holes in the mounting plate, and the end structure is connected to the connecting lines that emit ignition signals and recovery feedback signals.

[0006] The weldable fixing plate and the weldable mounting plate are welded or riveted together at fixed connection points, with welding being the preferred method. The positions of the fixed connection points are as follows: Figure 2As shown, the mounting holes on the fixed plate and the mounting plate are correspondingly designed to fix the ignition feedback needle assembly to the wall-mounted boiler. Corresponding mounting holes are also provided on the wall-mounted boiler for easy installation of the ignition feedback needle assembly using screws. The rectangular structure in the middle of the insulating ceramic plate is precisely positioned between the fixed plate and the mounting plate and pressed firmly, preventing the insulating ceramic plate from vertically expanding or rotating 360°, thereby preventing the rotation and movement of the ignition needle a, ignition needle b, and feedback needle, ensuring normal operation of ignition and feedback.

[0007] The fixing plate and mounting plate are made of the same material, which facilitates welding or riveting processes and avoids poor welding or riveting. For example, stainless steel or galvanized steel. The fixing plate and mounting plate do not need to be pre-fixed; the mounting plate can be separately fixed to the fixing plate with screws later.

[0008] Preferably, the insulating ceramic plate is provided with a front sleeve, a positioning block and a rear sleeve in sequence from front to back. The front sleeve, the positioning block and the rear sleeve are an integral structure, and the positioning block is locked in the ceramic fixing groove.

[0009] Preferably, the front and rear sleeves are generally cylindrical, the positioning block is generally cuboid, the front ends of the feedback needle, ignition needle a, and ignition needle b are exposed forward relative to the front sleeve, and the rear ends of the feedback needle, ignition needle a, and ignition needle b are exposed rearward relative to the rear sleeve.

[0010] Preferably, the fixing plate and the mounting plate are welded or riveted together by a fixing connection point located at the edge of the fixing plate and the mounting plate.

[0011] Preferably, the fixing plate and the mounting plate are made of the same material, namely stainless steel or galvanized steel.

[0012] Preferably, the fixing plate is provided with mounting positioning holes, and the mounting plate is also provided with mounting positioning holes corresponding to the mounting positioning holes. The ignition feedback needle assembly is fixed to the wall-mounted boiler by screws passing through the mounting positioning holes.

[0013] Preferably, the front sleeve of the insulating ceramic plate is fitted into the through hole of the fixing plate and is welded at high temperature using solder.

[0014] Preferably, the mounting plate is fixed to the fixing plate with screws.

[0015] Preferably, after the rear sleeve of the insulating ceramic plate passes through the through hole of the mounting plate, the end structure is connected to a connecting line that emits an ignition signal and a recovery feedback signal. The connecting line is used to electrically connect to the control system of the wall-hung boiler. Attached Figure Description

[0016] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0017] Figure 1 This is a structural schematic diagram of the ignition feedback needle assembly provided in the embodiment;

[0018] Figure 2 for Figure 1 A structural diagram from another perspective;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure behind the concealed mounting plate;

[0020] Figure 4 This is a schematic diagram of the structure of the metal mounting plate provided in the embodiment.

[0021] Figure labels: Feedback needle 1, a ignition needle 2, b ignition needle 3, fixing plate 4, mounting plate 5, insulating ceramic plate 6, a ignition needle end 7, b ignition needle end 8, feedback end 9, mounting positioning hole 10, fixing connection point 11, ceramic fixing groove 12. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings.

[0023] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] On one hand, an ignition feedback needle assembly is provided, which includes a feedback needle 1, an a-ignition needle 2, a b-ignition needle 3, a fixing plate 4, a mounting plate 5, and an insulating ceramic plate 6. The fixing plate 4 and the mounting plate 5 are fixedly connected, clamping and fixing the insulating ceramic plate 6, and restricting the forward and backward movement of the insulating ceramic plate 6. A ceramic fixing groove 12 is also formed between the fixing plate 4 and the mounting plate 5. The ceramic fixing groove 12 is used to fix and install the insulating ceramic plate 6 and to limit the rotation of the insulating ceramic plate 6. The insulating ceramic plate 6 is provided with a through hole for the feedback needle 1, the a-ignition needle 2, and the b-ignition needle 3 to pass through. The front end and the rear end of the feedback needle 1, the a-ignition needle 2, and the b-ignition needle 3 are exposed relative to the mounting plate 5 and the fixing plate 4, respectively.

[0026] The ignition feedback needle assembly 1 includes a feedback needle 1, an a-ignition needle 2, a b-ignition needle 3, a fixing plate 4, a mounting plate 5, an insulating ceramic plate 6, a mounting positioning hole 10, a fixing connection point 11, and a ceramic fixing groove 12. It also includes a feedback end 9 located at the rear end of the feedback needle 1, an a-ignition needle end 7 located at the rear end of the a-ignition needle 2, and a b-ignition needle end 8 located at the end of the b-ignition needle 3. The feedback needles 1, a-ignition needle 2, and b-ignition needle 3 can provide ignition and feedback signals. The front ends of these three needles are exposed relative to the front side of the mounting plate 5. They are all encased in a single piece of insulating ceramic plate 6 and fixed to it. The fixing plate 4, mounting plate 5, and insulating ceramic plate 6 each have corresponding circular through holes for the feedback needles 1, a-ignition needle 2, and b-ignition needle 3 to pass through and for securing them. The insulating ceramic plate 6 is arranged from front to back with a front sleeve, a positioning block, and a rear sleeve. The front sleeve, positioning block, and rear sleeve are an integral structure. The front and rear sleeves are roughly cylindrical, while the positioning block is roughly rectangular. The front ends of feedback needle 1, a-ignition needle 2, and b-ignition needle 3 protrude forward relative to the front sleeve, while the feedback ends 9, a-ignition needle ends 7, and b-ignition needle ends 8 protrude backward relative to the rear sleeve. The positioning block is positioned on the ceramic fixing groove 12 on the mounting plate 5 to prevent the insulating ceramic plate 6 from rotating. The mounting plate 5 and the fixing plate 4 clamp the insulating ceramic plate 6 between them, preventing it from moving back and forth. The three cylindrical front sleeves fit perfectly into the three circular through holes of the fixing plate 4 and are welded at high temperature using solder. The positioning block is pressed tightly against one side of the fixing plate 4, with one end and both sides of the positioning block pressed tightly against three sides of the mounting plate 5. Figure 4 The three sides of the ceramic fixing groove 12 are shown by the center line; the three rear sleeves at the end of the insulating ceramic plate 6 pass through the circular through hole of the mounting plate 5, and the end structure is connected to the connecting line that emits the ignition signal and the recovery feedback signal.

[0027] The weldable fixing plate 4 and the weldable mounting plate 5 are welded or riveted together via fixing connection point 11, with welding being the preferred option. The position of fixing connection point 11 is as follows: Figure 2 As shown, the mounting holes 10 on the fixing plate 4 and the mounting plate 5 are correspondingly provided to fix the ignition feedback needle 1 assembly to the wall-mounted boiler. Corresponding mounting holes 10 are also provided on the wall-mounted boiler to facilitate the installation of the ignition feedback needle 1 assembly using screws. The central cuboid structure of the insulating ceramic plate 6 is precisely positioned between the fixing plate 4 and the mounting plate 5 and pressed tightly, preventing the insulating ceramic plate 6 from vertically extending or rotating 360°, thereby preventing the rotation and movement of ignition needle 2 (a), ignition needle 3 (b), and feedback needle 1, ensuring normal operation of ignition and feedback.

[0028] The fixing plate 4 and the mounting plate 5 are made of the same material, which facilitates welding or riveting processes and avoids poor welding or riveting. For example, stainless steel or galvanized steel. The fixing plate 4 and the mounting plate 5 do not need to be pre-fixed; the mounting plate 5 can be separately fixed to the fixing plate 4 with screws later.

[0029] The fixing plate 4 and the mounting plate 5 are tightly connected by a fixed connection point 11 (such as welding or riveting), forming a clamping force on the insulating ceramic plate 6. Simultaneously, the design of the ceramic fixing groove 12 restricts the rotation of the insulating ceramic plate 6, thereby ensuring that the feedback needle 1, ignition needle a 2, and ignition needle b 3 can be stably fixed in their predetermined positions. Through the fixed connection of the fixing plate 4 and the mounting plate 5, and the clamping method of the insulating ceramic plate 6, the stability of the insulating ceramic plate 6 in all directions is ensured, effectively avoiding ignition and feedback abnormalities caused by the loosening of the ceramic parts, and improving the stability and safety of the wall-hung boiler.

[0030] In a preferred embodiment, the insulating ceramic plate 6 is provided with a front sleeve, a positioning block and a rear sleeve in sequence from front to back. The front sleeve, positioning block and rear sleeve are an integral structure, and the positioning block is locked in the ceramic fixing groove 12.

[0031] The cuboid structure of the positioning block can be tightly engaged within the ceramic fixing groove 12, thereby restricting the rotation of the insulating ceramic plate 6. Simultaneously, the design of the front and rear sleeves allows the feedback needle 1, ignition needle a 2, and ignition needle b 3 to pass smoothly through the insulating ceramic plate 6, maintaining their exposed front and rear ends. The integrated structure of the front sleeve, positioning block, and rear sleeve, along with the fixing method of the positioning block within the ceramic fixing groove 12, further enhances the stability of the insulating ceramic plate 6, preventing displacement or rotation during use.

[0032] In a preferred embodiment, the front sleeve and the rear sleeve are generally cylindrical, the positioning block is generally cuboid, the front ends of the feedback needle 1, the a ignition needle 2 and the b ignition needle 3 are exposed forward relative to the front sleeve, and the rear ends of the feedback needle 1, the a ignition needle 2 and the b ignition needle 3 are exposed rearward relative to the rear sleeve.

[0033] The roughly circular tubular design of the front and rear sleeves and the roughly rectangular structure design of the positioning block not only ensures the smooth passage of the feedback needle 1, ignition needle 2 (a) and ignition needle 3 (b), but also enhances the stability of the insulating ceramic plate 6.

[0034] In a preferred embodiment, the fixing plate 4 and the mounting plate 5 are welded or riveted together by a fixing connection point 11, which is located at the edge of the fixing plate 4 and the mounting plate 5.

[0035] The fixing plate 4 and the mounting plate 5 are connected together by welding or riveting, ensuring their robustness and thus improving the stability of the entire ignition feedback needle 1 assembly.

[0036] In a preferred embodiment, the fixing plate 4 and the mounting plate 5 are made of the same material, namely stainless steel or galvanized steel.

[0037] Welding or riveting with the same materials can reduce stress concentration and welding defects caused by material differences, thereby improving the strength and reliability of the weld or riveting. Using the same material for the fixing plate 4 and the mounting plate 5 improves the reliability and service life of the entire ignition feedback needle 1 assembly.

[0038] In a preferred embodiment, the fixing plate 4 is provided with mounting positioning holes 10, and the mounting plate 5 is also provided with mounting positioning holes 10 corresponding to the mounting positioning holes 10. The ignition feedback needle 1 assembly is fixed to the wall-mounted boiler by screws passing through the mounting positioning holes 10.

[0039] The screw fixing method securely fixes the ignition feedback needle 1 assembly to the wall-hung boiler, preventing it from shifting or falling off during use. The mounting positioning holes 10 and screw fixing method allow for easy fixation of the ignition feedback needle 1 assembly to the wall-hung boiler, while ensuring its stability and reliability.

[0040] In a preferred embodiment, the front sleeve of the insulating ceramic plate 6 is fitted into the through hole of the fixing plate 4 and is welded at high temperature using solder.

[0041] By welding the front sleeve of the insulating ceramic plate 6 into the through hole of the fixing plate 4 at high temperature, the stability of the insulating ceramic plate 6 can be further enhanced. This high-temperature welding method further strengthens the stability of the insulating ceramic plate 6 and prevents it from loosening or falling off during use.

[0042] In a preferred embodiment, the mounting plate 5 is fixed to the fixing plate 4 with screws.

[0043] Screws are a common connection method, enabling easy connection and disassembly of two components. Here, fixing the mounting plate 5 to the fixing plate 4 with screws ensures a secure connection and facilitates subsequent maintenance and replacement.

[0044] In a preferred embodiment, after the rear sleeve of the insulating ceramic plate 6 passes through the through hole of the mounting plate 5, the end structure is connected to a connecting line that emits an ignition signal and a recovery feedback signal. The connecting line is used to electrically connect to the control system of the wall-hung boiler.

[0045] The connecting cable connects the ignition feedback needle 1 assembly to the control system of the wall-hung boiler, enabling the generation and feedback of ignition signals. The connecting cable also electrically connects the rear sleeve of the insulating ceramic plate 6 to the control system of the wall-hung boiler, thus ensuring the normal operation of the boiler.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A stove ignition feedback needle assembly comprising: The feedback needle, the a ignition needle, the b ignition needle, the fixed plate, the mounting plate, the insulating ceramic plate, wherein: The fixed plate and the mounting plate are fixedly connected, both clamping and fixing the insulating ceramic plate, limiting the forward and backward movement of the insulating ceramic plate, and a ceramic fixing groove is formed between the fixed plate and the mounting plate, used for fixing the insulating ceramic plate and limiting the rotation of the insulating ceramic plate. The insulating ceramic plate is provided with a through hole for the feedback needle, the a ignition needle and the b ignition needle to pass through, and the front end and the rear end of the feedback needle, the a ignition needle and the b ignition needle are exposed compared with the mounting plate and the fixed plate.

2. The fireplace ignition feedback needle assembly of claim 1, wherein, The insulating ceramic plate is provided with a through hole for the feedback needle, the a ignition needle and the b ignition needle to pass through, and the front end and the rear end of the feedback needle, the a ignition needle and the b ignition needle are exposed compared with the mounting plate and the fixed plate.

3. The fireplace ignition feedback needle assembly of claim 2, wherein, The front sleeve, the positioning block and the rear sleeve are integrally formed, and the positioning block is clamped in the ceramic fixing groove.

4. The fireplace ignition feedback needle assembly of claim 1, wherein, The front sleeve and the rear sleeve are substantially circular tubes, and the positioning block is substantially a cuboid structure, the front end of the feedback needle, the a ignition needle and the b ignition needle is exposed forward compared with the front sleeve, and the rear end of the feedback needle, the a ignition needle and the b ignition needle is exposed backward compared with the rear sleeve.

5. The fireplace ignition feedback needle assembly of claim 4, wherein, The fixed plate and the mounting plate are welded or riveted together through a fixed connection point, which is located at the edge of the fixed plate and the mounting plate.

6. The fireplace ignition feedback needle assembly of claim 1, wherein, The fixed plate and the mounting plate are made of the same metal material, and the material metal is stainless steel or galvanized steel.

7. The fireplace ignition feedback needle assembly of claim 1, wherein, The fixed plate is provided with a mounting positioning hole, and the mounting plate is also provided with a mounting positioning hole corresponding to the mounting positioning hole, and the ignition feedback needle assembly is fixed on the wall-hanging stove through the mounting positioning hole by a screw.

8. The fireplace ignition feedback needle assembly of claim 1, wherein, The front sleeve of the insulating ceramic plate is sleeved in the through hole of the fixed plate, and high-temperature welding is performed by using solder.

9. The fireplace ignition feedback needle assembly of claim 1, wherein, The mounting plate is fixed on the fixed plate by a screw. The rear sleeve of the insulating ceramic plate is connected with a connecting line for emitting ignition signal and recycling feedback signal after passing through the through hole of the mounting plate, and the connecting line is used for electrical connection with the control system of the wall-hanging stove.

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