CN218864223U - Ignition device and gas water heater - Google Patents

Abstract

The application belongs to the technical field of water heaters, and particularly relates to an ignition device and a gas water heater. This application aims at solving the loaded down with trivial details, the low problem of assembly efficiency of current ignition device installation. The ignition device of the gas water heater comprises an insulator and a fixed shell, wherein a first ignition needle and a second ignition needle are mounted on the insulator, the first end of the first ignition needle and the first end of the second ignition needle protrude out of the first end of the insulator to form an ignition end, and the second end of the first ignition needle and the second end of the second ignition needle protrude out of the second end of the insulator to form a connecting end; the fixed part is formed between the first end of the insulator and the second end of the insulator, the fixed shell is provided with the first through hole, the fixed shell is arranged on the outer side of the insulator, the fixed shell is fixedly connected with the fixed part to form the integrated ignition device, the fixed shell is fixed on the outer shell of the combustor during installation, the installation is simple, stable and reliable, all structures of the ignition device do not need to be assembled independently, and the assembly is simple, convenient and efficient.

Description

Ignition device and gas water heater

Technical Field

The application belongs to the technical field of water heaters, and particularly relates to an ignition device and a gas water heater.

Background

The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode to achieve the purpose of preparing hot water.

The gas water heater is provided with a burner, high-temperature flue gas is generated by burning gas in the burner, and the high-temperature flue gas exchanges heat with the heat exchange device, so that the aim of heating water is fulfilled. The burner needs an ignition device to ignite fuel when being started, and the existing ignition device comprises a ceramic body provided with an ignition needle and a fixing plate; during assembly, the ceramic body and the ignition needle need to be placed on the shell of the combustor, then the fixing plate is fixed on the shell of the combustor, and the ceramic body is pressed on the shell of the combustor by the fixing plate. Each part of the ignition device is independent, the installation is complicated, and the position of the ceramic body needs to be adjusted for many times when the fixing plate is installed, so that the assembly efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem among the prior art, be promptly for solving the technical problem that current ignition installs loaded down with trivial details, assembly efficiency is low, this application provides an ignition and gas heater.

The ignition device includes: an insulator and a stationary case; a first ignition needle and a second ignition needle are mounted on the insulator, a first end of the first ignition needle and a first end of the second ignition needle both protrude out of a first end of the insulator to form ignition ends, and a second end of the first ignition needle and a second end of the second ignition needle both protrude out of a second end of the insulator to form a connecting end; a fixing part is formed between the first end of the insulator and the second end of the insulator; the fixed shell is provided with a first through hole, and the fixed shell is sleeved outside the insulator; the fixed shell is fixedly connected with the fixed part; the first end of the insulator and the second end of the insulator are respectively positioned outside the two ends of the first via hole.

In an optional technical scheme of the ignition device, the fixing part is clamped with the fixing shell.

In an optional technical solution of the above ignition device, a fitting boss is formed between the first end of the insulator and the second end of the insulator, a limit buckle is provided between the second end of the insulator and the fitting boss, and the limit buckle, the fitting boss, and a portion of the insulator located between the limit buckle and the fitting boss form the groove-shaped fixing portion together.

In an optional technical scheme of the ignition device, a plurality of limit buckles are arranged at intervals along the circumferential direction of the insulator.

In an optional technical scheme of the ignition device, the limit buckle is a cone arranged on the insulator, one surface of the limit buckle departing from the insulator is an inclined surface, and the cross sectional area of one end of the limit buckle close to the matching boss is larger than that of one end of the limit buckle far away from the matching boss.

In an alternative aspect of the above ignition device, the mating boss is an annular boss extending circumferentially around the insulator; the fixing shell comprises a fixing plate part, a connecting part and a limiting part, the connecting part is opposite to the peripheral side face of the matched boss, one end of the connecting part, which is close to the limiting buckle, is bent and extended towards the insulator to form the limiting part, and one end of the connecting part, which is far away from the limiting buckle, is bent and extended away from the insulator to form the fixing plate part; spacing portion is the annular to enclose and become first via hole, spacing portion is the annular, spacing portion and trough-shaped fixed part joint.

In an optional technical solution of the above ignition device, the ignition device further comprises a pressure plate, and the pressure plate is provided with a second through hole opposite to the first through hole; the pressing plate is fixedly connected with the fixing plate part, and the pressing plate extends towards the insulator to be in contact with the matching boss.

In an optional technical scheme of the ignition device, one surface of the fixing plate portion, which faces the pressure plate, is flush with one surface of the matching boss, which faces the pressure plate, and one surface of the fixing plate portion, which faces the pressure plate, and one surface of the matching boss, which faces the pressure plate, are both bonded with the pressure plate.

In an optional technical solution of the above ignition device, a plurality of first mounting holes are provided at intervals along a circumferential direction of the fixing plate portion, and a plurality of second mounting holes are provided on the pressing plate, the second mounting holes corresponding to the first mounting holes.

The gas water heater includes: the ignition device comprises a combustor inner shell and the ignition device, wherein a combustor outer shell is arranged on the outer side of the combustor inner shell; the fixed shell of the ignition device is arranged on the outer shell of the combustor, and the ignition end of the ignition device is positioned in the inner shell of the combustor.

As can be understood by those skilled in the art, the ignition device of the gas water heater of the present application includes an insulator and a fixed shell, a first ignition needle and a second ignition needle are mounted on the insulator, a first end of the first ignition needle and a first end of the second ignition needle both protrude out of a first end of the insulator to form an ignition end, and a second end of the first ignition needle and a second end of the second ignition needle both protrude out of a second end of the insulator to form a connection end; a fixing part is formed between the first end of the insulator and the second end of the insulator, the fixing shell is provided with a first through hole, the fixing shell is sleeved outside the insulator, and the fixing shell is fixedly connected with the fixing part; the first end of the insulator and the second end of the insulator are respectively positioned outside the two ends of the first via hole. The utility model provides a set casing and insulator are together fixed, form the ignition of integral type, when the installation with the set casing fix the combustor shell can, the installation reliable and stable need not to assemble each structure of ignition alone, assemble simple and conveniently, efficient.

Drawings

An alternative embodiment of the ignition device of the present application is described below with reference to the drawings. The attached drawings are as follows:

FIG. 1 is an exploded view of a gas water heater provided by an embodiment of the present application;

FIG. 2 is an exploded view of a burner provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an ignition device provided in an embodiment of the present application;

FIG. 4 is an exploded view of an ignition device provided by an embodiment of the present application;

FIG. 5 is a right side view of the U-shaped plate and the ignition device provided by the embodiment of the present application;

FIG. 6 isbase:Sub>A partial sectional view taken along line A-A of FIG. 5;

fig. 7 is a partial sectional view in the direction B-B in fig. 5.

In the drawings: 100: an ignition device; 110: an insulator; 111: a first ignition needle; 1111: a first firing end; 1112: a first connection end; 112: a second ignition needle; 1121: a second firing end; 1122: a second connection end; 113: a fixed part; 1131: matching with the boss; 1132: a limit buckle; 1133: an inclined surface; 120: a stationary case; 121: a fixed plate portion; 1211: a first mounting hole; 122: a connecting portion; 123: a limiting part; 1231: a first via hole; 130: pressing a plate; 131: a second via hole; 132: a second mounting hole; 140: a screw; 200: a burner housing; 210: a front side plate; 220: a rear side plate; 230: a U-shaped plate; 231: a projection table; 240: a gasket; 310: fire grate; 320: an inner wall panel; 321: avoiding the opening; 330: a gas distributing rod; 400: a heat exchange device; 500: an outer housing; 510: a first half shell; 520: a second half shell; 600: a fan.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining technical principles of the embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application. And can be adjusted as needed by those skilled in the art to suit particular applications.

Furthermore, it should be noted that in the description of the embodiments of the present application, the terms of direction or positional relationship indicated by the terms "inside" and "outside" and the like are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the embodiments of the present application.

Furthermore, it should be noted that, in the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the examples of the present application can be understood by those skilled in the art as appropriate.

The shell of the gas water heater is internally provided with a burner, gas is combusted in the burner to generate high-temperature flue gas, and the high-temperature flue gas exchanges heat with the heat exchange device to realize the purpose of heating water. The combustor needs ignition device to ignite fuel when starting, and current ignition device is including the ceramic body and the fixed plate that are equipped with the ignition needle, and when the assembly, need place ceramic body and ignition needle on the casing of combustor earlier, then fix the fixed plate on the casing of combustor, utilize the fixed plate to compress tightly the ceramic body on the casing of combustor. Each part of the ignition device is independent, the installation is complicated, and the position of the ceramic body needs to be adjusted for many times when the fixing plate is installed, so that the assembly efficiency is low.

In view of this, the embodiment of the present application provides an ignition device of integral type, which includes an insulator and a fixing shell, a first ignition needle and a second ignition needle are installed on the insulator, a protruding annular boss is provided in the middle of the insulator, a limit buckle is provided between the outer end of the annular boss and the insulator, the fixing shell is sleeved outside the insulator, and the fixing shell is clamped in a groove formed between the limit buckle and the annular boss, so that the insulator and the fixing shell are connected into a whole, only the fixing shell needs to be fixed on a burner shell during installation, the operation is simple and convenient, relative movement between the fixing shell and the insulator is avoided, the installation is stable and reliable, and the assembly efficiency is high.

The following describes an optional technical scheme of the ignition device and the gas water heater of the embodiment of the application with reference to the attached drawings.

FIG. 1 is an exploded view of a gas water heater provided by an embodiment of the present application; fig. 2 is an exploded view of a burner provided in an embodiment of the present application.

With reference to fig. 1 and 2, an embodiment of the present application provides a gas water heater, which includes: an outer casing 500 and a burner. Wherein, shell body 500 provides installation space for structures such as combustor, and the burning gas produces high temperature flue gas in the combustor. The combustor comprises a combustor outer shell 200, a combustor inner shell, a fire grate 310 and the like, wherein the combustor inner shell is positioned in the combustor outer shell 200, and the fire grate 310 burns fuel gas to generate high-temperature flue gas.

The outer case 500 may be a rectangular case, and the outer case 500 includes a first case half 510 and a second case half 520, wherein the first case half 510 is a U-shaped plate case, the first case half 510 includes a front side plate portion, a left side plate portion and a right side plate portion, and the left side plate portion and the right side plate portion are disposed at the left and right sides of the front side plate portion at a relative interval. The first half-shell 510 is a unitary piece that facilitates assembly of the outer shell 500. Half shell 520 includes fixed connection's rear side board portion, top end board portion and bottom board portion, and top end board portion and bottom board portion are fixed respectively at the top and the bottom of rear side board portion, top end board portion and the top fixed connection of first half shell 510, bottom board portion and the bottom fixed connection of first half shell 510, the left and right sides of rear side board portion respectively with left side board portion and right side board portion fixed connection. The plate portions of the outer case 500 may be connected by screws, rivets, or the like, but the embodiment of the present invention is not limited thereto.

The gas water heater of the embodiment of the application further comprises a burner shell 200, a heat exchange device 400 and a fan 600. Wherein, the burner outer shell 200 provides a space for the burner inner shell and the heat exchange device 400 to exchange heat; the fan 600 provides air for burner combustion. The burner housing 200 is mounted inside the outer case 500 by a wall hanger, thereby fixing the burner inside the outer case 500.

In some possible implementations, the burner housing 200 includes a front plate 210, a rear plate 220, and a U-shaped plate 230, the front plate 210 and the rear plate 220 being spaced apart from each other. The rear side edge of the U-shaped plate 230 is riveted with the rear side plate 220, for example, the rear side edge of the U-shaped plate 230 is provided with a U-shaped flange, the edge of the rear side plate 220 is provided with a first folded edge, the first folded edge is accommodated in the U-shaped flange, and the first folded edge is riveted with the U-shaped flange; the front side of the U-shaped plate 230 is screwed to the front plate 210, for example, the front side of the U-shaped plate 230 is provided with a second folded edge, the second folded edge is screwed to the front plate 210, and a sealing gasket 240 is provided between the second side of the U-shaped plate 230 and the front plate 210, so as to seal the burner housing 200.

According to the embodiment of the application, the rear side plate 220 is riveted with the first side edge of the U-shaped plate 230, so that the assembly efficiency can be improved, initial positioning can be provided for threaded connection of the front side plate 210 and the U-shaped plate 230, and screws can be conveniently screwed in; the front plate 210 is screw-coupled to the U-shaped plate 230, which is advantageous for securing structural stability and reliability of the burner housing 200.

The U-shaped plate 230 is substantially U-shaped, and the U-shaped plate 230 of the embodiment of the present application is an integrated piece, and includes a bottom plate portion, a first plate portion, and a second plate portion that are integrally formed. An air inlet is formed in the bottom plate portion and communicated with the fan 600 to provide air for gas combustion. The blower 600 may be fixed to a bottom plate portion of the U-shaped plate 230, and the blower 600 may be further fixed to an inside of the outer case 500 by a fixing bracket.

The top ends of the front side plate 210 and the rear side plate 220 are protruded out of the U-shaped plate 230, and a heat exchange space is formed between the parts of the front side plate 210 and the rear side plate 220 protruded out of the U-shaped plate 230 for installing the heat exchange device 400, so that the heat exchange device 400 exchanges heat. The top end of the front side plate 210 upwards extends to protrude out of the U-shaped plate 230, and the top end of the rear side plate 220 upwards extends to protrude out of the U-shaped plate 230 to serve as a partial cavity wall of a heat exchange cavity of the heat exchange device 400, so that the connecting positions of the heat exchange device 400 and the burner shell 200 can be reduced, the risk of smoke leakage is reduced, and the assembling efficiency of the gas water heater can be improved. The front side plate 210, the rear side plate 220, and the U-shaped plate 230 form an installation space for installing the inner burner housing to burn the fire rows 310 in the inner burner housing. So, preceding curb plate 210 and posterior lateral plate 220 all regard as the lateral wall in combustion space and heat transfer space simultaneously for the high temperature flue gas that the combustor burning produced can unobstructed entering heat transfer space, so that heat transfer device 400 carries out the heat transfer.

The burner inner shell of the embodiment of the application is installed at the bottom end inside the burner outer shell 200, and the heat exchange device 400 is installed at the top end inside the burner outer shell 200, so that high-temperature flue gas generated by combustion of the fire grate 310 in the burner inner shell can upwards flow through the heat exchange device 400 for heat exchange, and the purpose of preparing hot water is achieved.

With continued reference to fig. 2, the burner inner casing according to the embodiment of the present application includes inner wall plates 320, wherein the inner wall plates 320 are provided with a plurality of pieces, for example, the inner wall plates 320 are provided with four pieces, wherein two inner wall plates 320 are disposed at a front-rear interval, and the other two inner wall plates 320 are disposed at a left-right interval. The burner further includes a combustion shelf at the bottom of the inner wall panel 320 for mounting the fire grate 310, the fire grate 310 burning flames inside the burner inner shell. The fire rows 310 are provided in plurality, and the plurality of fire rows 310 are arranged at intervals in the left-right direction (corresponding to the X-axis direction in the drawing). The combustor still includes and divides gas pole 330, divides the one end of gas pole 330 to pass through control valve and gas pipe connection, divides the other end of gas pole 330 to be provided with the nozzle, stretches into in every fire row 310, provides the gas for the fire row burning.

It should be noted that, in the embodiments of the present application, the directional word "front" refers to a side of the gas water heater facing a user, and the directional word "bottom" refers to a side facing the ground. The front-back direction corresponds to the Y axis in the drawing, the left-right direction corresponds to the X axis in the drawing, and the vertical direction corresponds to the Z axis in the drawing.

With continued reference to fig. 1 and 2, the gas water heater of the embodiment of the present application further includes an ignition device 100, and the ignition device 100 is fixed to the burner housing 200. In the present embodiment, the ignition device 100 is fixed to the second plate portion of the U-shaped plate 230; of course, the ignition device 100 may be fixed at other positions of the burner housing 200. Correspondingly, an escape opening 321 is provided in the inner wall 320 of the burner inner casing to escape the ignition device 100, so that the ignition end of the ignition device 100 can extend above the fire grate 310 to ignite the gas.

FIG. 3 is a schematic structural diagram of an ignition device provided in an embodiment of the present application; fig. 4 is an exploded view of an ignition device provided in an embodiment of the present application.

With reference to fig. 3 and 4, the ignition device of the embodiment of the present application includes: the insulator 110 is used for mounting an ignition needle, and the fixing shell 120 is used for fixing the insulator 110 and the ignition needle on the insulator 110 to the burner housing 200.

The insulator 110 of the embodiment of the present application may be an insulating ceramic body, the insulator 110 may be provided with a cylindrical shape, a prismatic shape, or the like, and the cross section of the insulator 110 of the embodiment of the present application is substantially oblong. The insulator 110 is provided with the first ignition needle 111 and the second ignition needle 112, for example, the insulator 110 is provided with a first fixing hole and a second fixing hole, the first ignition needle 111 can be installed in the first fixing hole through an adhesive, the second ignition needle 112 can be installed in the second fixing hole through an adhesive, so that the first ignition needle 111 and the second ignition needle 112 can be fixed, the first fixing hole and the second fixing hole can be sealed, and the phenomenon that water vapor corrodes the ignition needle through a pore to cause external discharge or ignition needle failure and the like is avoided.

The first end of the first ignition pin 111 and the first end of the second ignition pin 112 are protruded from the first end of the insulator 110 to form an ignition end, and the ignition ends are located inside the burner housing 200. For example, the first end of the first ignition needle 111 protrudes out of the first end of the insulator 110 to form a first ignition end 1111, the first end of the second ignition needle 112 protrudes out of the first end of the insulator 110 to form a second ignition end 1121, and both the first ignition end 1111 and the second ignition end 1121 are tapered tips, so that tip discharge is facilitated to ignite fuel gas. The first sparking end 1111 and the second sparking end 1121 both extend through the relief opening 321 and are positioned on the inside of the inner wall panel 320.

The second end of the first ignition needle 111 and the second end of the second ignition needle 112 both protrude from the second end of the insulator 110 to form connection ends, for example, the second end of the first ignition needle 111 protrudes from the second end of the insulator 110 to form a first connection end 1112, and the second end of the second ignition needle 112 protrudes from the second end of the insulator 110 to form a second connection end 1122. The first and second connection ends 1112 and 1122 are used to connect to a thermal power source, such as a battery. When a user turns on the water using device, the ignition power supply supplies current to the first ignition needle 111 and the second ignition needle 112 under the action of the control signal, the first ignition end 1111 and the second ignition end 1121 generate instantaneous high potential, and an ignition arc in space is generated, so that the gas is ignited to generate flame.

In the embodiment of the present application, the first ignition needle 111 is L-shaped, the first ignition needle 111 is bent toward the second ignition needle 112, and the second ignition needle 112 is straight; with this arrangement, not only a gap can be maintained between the first ignition pin 111 and the second ignition pin 112, but also the first ignition end 1111 and the second ignition end 1121 can have a closer tip discharge distance.

In addition, the insulator 110 of the embodiment of the present application may further include an induction pin for inducing a combustion state of the gas.

The first end of the insulator 110 of the embodiment of the present application is located inside the burner housing 200, and the second end of the insulator 110 is located outside the burner housing 200. A fixing portion 113 is formed between the first end of the insulator 110 and the second end of the insulator 110, and the fixing portion 113 is fixedly connected with the fixing shell 120, for example, the fixing portion 113 is adhered to the fixing shell 120; for another example, the fixing portion 113 is screwed with the fixing case 120; for another example, the fixing portion 113 is engaged with the fixing housing 120, so that the assembly is simple and convenient, and the connection is stable and reliable. Exemplarily, the fixing portion 113 is groove-shaped, and the fixing shell 120 is clamped in the groove-shaped fixing portion 113; illustratively, the fixing portion 113 protrudes from the surface of the insulator 110, and the fixing shell 120 is provided with a slot, with which the fixing portion 113 is engaged.

The fixing shell 120 of the embodiment of the present application is provided with a first via hole 1231, the fixing shell 120 is sleeved outside the insulator 110, and the first end of the insulator 110 and the second end of the insulator 110 are respectively located outside two ends of the first via hole 1231. The insulator 110 of a portion between the stationary shell 120 and a first end of the insulator 110 is located inside the burner housing 200, and the insulator 110 of a portion between the stationary shell 120 and a second end of the insulator 110 is located outside the burner housing 200.

The fixing case 120 of the embodiment of the present application is mounted on the burner housing 200, thereby fixing the insulator 110 and the first and second ignition needles 111 and 112 mounted thereon to the burner housing 200.

Therefore, the fixing shell 120 and the insulator 110 of the embodiment of the present application are fixed together to form the integrated ignition device 100, and the fixing shell 120 is fixed to the burner housing 200 during installation, so that each structure of the ignition device 100 does not need to be separately assembled, and the assembly is simple and convenient, and has high efficiency.

FIG. 5 is a right side view of the U-shaped plate and the ignition device provided by the embodiment of the present application;

FIG. 6 isbase:Sub>A partial cross-sectional view taken in the direction A-A of FIG. 5; fig. 7 is a partial sectional view in the direction B-B in fig. 5.

Referring to fig. 5 to 7, in the embodiment of the present application, a fitting boss 1131 is formed between the first end of the insulator 110 and the second end of the insulator 110, and the fitting boss 1131 protrudes from the surface of the insulator 110; a limit buckle 1132 is arranged between the second end of the insulator 110 and the matching boss 1131, the limit buckle 1132, the matching boss 1131 and the part of the insulator 110 between the limit buckle 1132 and the matching boss 1131 form a groove-shaped fixing part 113 together, and the groove-shaped fixing part 113 is clamped with the fixing shell 120. Wherein, the limiting button 1132 is integrally formed with the insulator 110. The embodiment of the application arranges the convex limiting buckle 1132 and the matching boss 1131 on the peripheral side surface of the insulator 110, so that the fixing part 113 clamped with the fixing shell 120 can be formed, the structural strength and stability of the insulator 110 can be improved, and the influence of slotting on the insulator 110 on the strength of the insulator 110 can be avoided.

The position-limiting fastener 1132 may be one, for example, the position-limiting fastener 1132 is an annular fastener extending along the circumferential direction of the insulator 110, and such a configuration may improve the reliability of the clamping connection between the fixing shell 120 and the insulator 110.

The plurality of the limit buckles 1132 may be provided, for example, the plurality of the limit buckles 1132 are provided at intervals in the circumferential direction of the insulator 110, so that the fixing shell 120 can be conveniently clamped into the groove-shaped fixing portion 113 while the reliability of clamping the fixing shell 120 with the insulator 110 is improved. Exemplarily, when the cross section of the insulator 110 is an oblong, the two straight side surfaces of the insulator 110 are respectively provided with the limit buckles 1132, and the two limit buckles 1132 are opposite, so that the fixing shell 120 can be stably limited, the fixing shell 120 can be conveniently clamped into the groove-shaped fixing portion 113, and the limit buckles 1132 extend along the linear direction, thereby being beneficial to improving the processing convenience.

Referring to fig. 3, 4, 6 and 7, in an embodiment of the present invention, the stop button 1132 is a cone disposed on the insulator 110, and a cross-sectional area of an end of the stop button 1132 near the mating boss 1131 is larger than a cross-sectional area of an end of the stop button 1132 far from the mating boss 1131. Wherein, the cross section of the limit button 1132 is the cross section formed by cutting the limit button 1132 through the YZ plane. This arrangement facilitates the engagement of the retaining shell 120 in the groove-like retaining portion 113 in the direction of the second end of the insulator 110 toward the first end of the insulator 110.

The surface of the stopper 1132 facing away from the insulator 110 is an inclined surface 1133, one end of the inclined surface 1133 facing away from the fitting boss 1131 is connected to the peripheral surface of the insulator 110, and one end of the inclined surface 1133 facing towards the fitting boss 1131 is spaced from the peripheral surface of the insulator 110. This application embodiment sets up for fixed shell 120 can slide along inclined plane 1133 towards cooperation boss 1131, thereby between cooperation boss 1131 and the spacing 1132 is gone into to the card, does benefit to the convenience that improves fixed shell 120 and insulator 110 joint, improves the packaging efficiency. Spacing knot 1132 is the plane with the relative one side of cooperation boss 1131, and this plane can set casing 120 butt, improves the stability of set casing 120 and fixed part 113 joint.

The engaging protrusions 1131 of the embodiment of the present application may be segmented, and illustratively, multiple segments of the engaging protrusions 1131 are disposed at intervals along the circumference of the insulator 110, for example, the engaging protrusions 1131 are disposed corresponding to the limit buckle 1132.

In fig. 4, 6 and 7, the fitting boss 1131 is an annular boss extending circumferentially around the insulator 110, and is configured to restrain the stationary shell 120 at various positions circumferentially from the insulator 110.

The fixing shell 120 includes a fixing plate portion 121, a connecting portion 122 and a limiting portion 123, the connecting portion 122 is opposite to the peripheral side surface of the fitting boss 1131, and optionally, the connecting portion 122 abuts against the fitting boss 1131, which is beneficial to improving the stability of the connection between the fixing shell 120 and the insulator 110. One end of the connecting portion 122 close to the position-limiting fastener 1132 bends and extends towards the insulator 110 to form a position-limiting portion 123, one end of the connecting portion 122 away from the position-limiting fastener 1132 bends and extends away from the insulator 110 to form a fixing plate portion 121, so that the position-limiting portion 123 and the fixing plate portion 121 are located at two ends of the connecting portion 122 respectively, the position-limiting portion 123 and the fixing plate portion 121 are located at two sides of the connecting portion 122 respectively, and the radial section of the fixing shell 120 is in a shape of a Z.

Wherein, spacing portion 123 is the annular to enclose into first via hole 1231, spacing portion 123 and the fixed part 113 joint that is the trough-shaped, spacing portion 123 towards the one side and the spacing 1132 butt of spacing knot 1132, spacing portion 123 and the one side and the cooperation boss 1131 butt of cooperation boss 1131 of orientation. By such arrangement, the stability of the clamping connection between the fixing shell 120 and the fixing portion 113 can be ensured, and the fixing shell 120 can be conveniently clamped into the groove-shaped fixing portion 113.

The ignition device 100 of the embodiment of the present application further includes a pressing plate 130, the pressing plate 130 is provided with a second through hole 131 opposite to the first through hole 1231, and the pressing plate 130 is sleeved on the outer side of the insulator 110. The pressing plate 130 is fixedly connected to the fixing plate portion 121, for example, the pressing plate 130 is bonded to the fixing plate portion 121; for another example, the pressing plate 130 is engaged with the fixing plate portion 121. And the pressing plate 130 extends toward the insulator 110 to contact with the fitting boss 1131, so that the fitting boss 1131 is located between the limiting portion 123 and the pressing plate 130 to further limit the insulator 110, so that the insulator 110, the fixing shell 120 and the pressing plate 130 form an integrated structure. The ignition device 100 of the embodiment of the application can play a role of a gasket by arranging the pressing plate 130, so that the installation stability of the ignition device 100 is improved; the pressure plate 130 may also function to restrain the insulator 110.

In the embodiment of the present application, a face of the fixing plate portion 121 facing the platen 130 is flush with a face of the matching boss 1131 facing the platen 130, that is, a face of the fixing plate portion 121 facing the platen 130 is on the same plane as a face of the matching boss 1131 facing the platen 130. The surface of the fixing plate portion 121 facing the platen 130 and the surface of the fitting boss 1131 facing the platen 130 are bonded to the platen 130. Thus, not only is assembly convenient, but also the platen 130 is bonded to the insulator 110 to help maintain the structural integrity of the ignition device 100. The bonding connection mode is adopted, so that the installation tightness of the ignition device 100 is improved, and the smoke leakage is avoided.

In order to mount the ignition device 100 on the U-shaped plate 230 of the burner housing 200, the present embodiment is provided with a plurality of first mounting holes 1211 at intervals in the circumferential direction of the fixing plate portion 121, for example, two first mounting holes 1211 at intervals in the circumferential direction of the fixing plate portion 121; the pressing plate 130 is provided with a plurality of second mounting holes 132, and the second mounting holes 132 are provided to correspond to the first mounting holes 1211. Referring to fig. 7,U, the template 230 has a threaded hole corresponding to the first mounting hole 1211. The ignition device 100 of the embodiment of the present application further includes screws 140, and the screws 140 are threaded into the threaded holes of the U-shaped plate 230 through the first mounting holes 1211 and the second mounting holes 132, so as to fix the ignition device 100 to the U-shaped plate 230.

The inner side of the template 230 is provided with a protruding platform 231 in combination with the template 7,U, and the threaded hole penetrates through the U-shaped template 230 and the protruding platform 231, so that the axial length of the threaded hole in the U-shaped template 230 is prolonged, and the mounting stability of the ignition device 100 is improved.

In summary, the ignition device 100 of the gas water heater according to the embodiment of the present application includes the insulator 110 and the fixing shell 120, the insulator 110 is mounted with the first ignition needle 111 and the second ignition needle 112, the first end of the first ignition needle 111 and the first end of the second ignition needle 112 protrude from the first end of the insulator 110 to form the ignition end, and the second end of the first ignition needle 111 and the second end of the second ignition needle 112 protrude from the second end of the insulator 110 to form the connection end; a fixing portion 113 is formed between the first end of the insulator 110 and the second end of the insulator 110, the fixing portion 113 is fixedly connected with the fixing shell 120, the fixing shell 120 is provided with a first through hole 1231, the fixing shell 120 is sleeved on the outer side of the insulator 110, and the first end of the insulator 110 and the second end of the insulator 110 are respectively located on the outer sides of two ends of the first through hole 1231. The fixed shell 120 and the insulator 110 of the embodiment of the application are fixed together to form the integrated ignition device 100, and the fixed shell 120 is fixed on the combustor shell 200 during installation, so that the installation is stable and reliable, each structure of the ignition device 100 does not need to be assembled independently, and the assembly is simple and convenient and has high efficiency.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims (10)

1. An ignition device, comprising: an insulator and a stationary case;

a first ignition needle and a second ignition needle are mounted on the insulator, a first end of the first ignition needle and a first end of the second ignition needle both protrude out of a first end of the insulator to form ignition ends, and a second end of the first ignition needle and a second end of the second ignition needle both protrude out of a second end of the insulator to form a connecting end; a fixing portion is formed between a first end of the insulator and a second end of the insulator;

the fixed shell is provided with a first through hole, and the fixed shell is sleeved outside the insulator; the fixed shell is fixedly connected with the fixed part; the first end of the insulator and the second end of the insulator are respectively located outside two ends of the first via hole.

2. The ignition device of claim 1, wherein the retainer is snap-fit to the retainer housing.

3. The ignition device of claim 2, wherein a mating boss is formed between the first end of the insulator and the second end of the insulator, a limit buckle is disposed between the second end of the insulator and the mating boss, and the limit buckle, the mating boss, and a portion of the insulator between the limit buckle and the mating boss collectively form the fixing portion in the form of a groove.

4. The ignition device of claim 3, wherein a plurality of said limit clips are provided at intervals along a circumferential direction of said insulator.

5. The ignition device of claim 3, wherein the retaining buckle is a cone disposed on the insulator, a face of the retaining buckle facing away from the insulator is an inclined face, and a cross-sectional area of an end of the retaining buckle near the mating boss is larger than a cross-sectional area of an end of the retaining buckle far from the mating boss.

6. The ignition device of any one of claims 3-5, wherein the mating boss is an annular boss extending circumferentially around the insulator; the fixing shell comprises a fixing plate part, a connecting part and a limiting part, wherein the connecting part is opposite to the peripheral side face of the matched boss, one end of the connecting part, which is close to the limiting buckle, is bent and extended towards the insulator to form the limiting part, and one end of the connecting part, which is far away from the limiting buckle, is bent and extended away from the insulator to form the fixing plate part; the limiting portion is annular and surrounds the first via hole, and the limiting portion is connected with the groove-shaped fixing portion in a clamped mode.

7. The ignition device of claim 6, further comprising a pressure plate provided with a second via hole opposite the first via hole; the pressing plate is fixedly connected with the fixing plate portion, and the pressing plate extends towards the insulator to be in contact with the matching boss.

8. The ignition device of claim 7, wherein a face of the fixing plate portion facing the pressure plate is flush with a face of the mating boss facing the pressure plate, and both the face of the fixing plate portion facing the pressure plate and the face of the mating boss facing the pressure plate are bonded to the pressure plate.

9. The ignition device according to claim 7, wherein a plurality of first mounting holes are provided at intervals in a circumferential direction of the fixing plate portion, and a plurality of second mounting holes are provided in the pressure plate, the second mounting holes being provided corresponding to the first mounting holes.

10. A gas water heater, comprising: a burner inner shell and the ignition device of any one of claims 1 to 9, wherein a burner outer shell is arranged on the outer side of the burner inner shell; the fixed shell of the ignition device is arranged on the outer shell of the combustor, and the ignition end of the ignition device is positioned in the inner shell of the combustor.

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