JPH0233522A - Steam type burner - Google Patents

Abstract

PURPOSE: To reduce a repair cost and an exchange cost, by a method wherein a support member is removably coupled to a support body for an absorbing body of which a part of the wall of an ignition chamber consists and an ignition device is arranged at the support member. CONSTITUTION: In a vaporizing type burner 1, a support body 4 for an absorbing body 5 is formed in the shape of a pot and provided with a bottom 6. A part of an ignition chamber 9 consists of an outer peripheral part 8 of a support body 4, and the opposite side to the bottom 6 of the support body 4 is closed by a support member 10 for an ignition device 11, and the support member 10 is removably coupled to the support body 4 and a burner chamber 3. A rodform glow plug 12 and a flame monitoring device 16 is mounted as the ignition device 11 on the support member 10. A seal 17 prevents liquid fuel from outflow to the outside through a gap between the burner chamber 3 and the support body 4. This constitution relieves a problem on a seal and exchanges the ignition device and the flame monitoring device regardless of the support body and irrelevantly exchanges the absorbing body and the support body, and reduces repair and maintenance costs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is characterized in that a support for an absorber capable of supplying liquid fuel via a fuel supply pipe reaches into a combustion chamber, and the absorber is connected to the front surface of the support, In other words, a heating device using liquid fuel, especially a vehicle, which is provided on the side facing the combustion chamber, has an ignition chamber adjacent to the back of the support, and has an ignition device located in front of the back of the support in this ignition chamber. This invention relates to an evaporative burner for an auxiliary heating system for (vehicles).

[Conventional technology and its problems]

West German Patent Application No. 3713460, which is the applicant's earlier application
．． No. 4 describes an evaporative burner of the above type. In this case, an ignition device in the form of a rod-shaped glow plug is provided, which extends into an ignition chamber provided in front of the back side of the absorber support. The support for the absorber extends in the axial direction towards the combustion chamber, and the ignition device, in which a combustion air inlet is provided in this area, passes through the surrounding case and is screwed to reach the ignition chamber. The outer wall of the fixed 0 ignition chamber surrounds the ignition device,
Between the outer wall and the ignition device an intermediate chamber is formed.The ignition device passes through the case, which not only has to be provided with a screw tag, which leads to a relatively high cost, but also has a large impact on the exhaust range. Additional and costly measures must be taken to reliably seal the combustion air area, in this case ensuring that the exhaust gas does not leak into the atmosphere through the gaps in the ignition device, which acts as a starting device. Furthermore, the ignition and combustion processes are very complicated in evaporative burners of this type, since it is unavoidable that undesired air enters through the gaps. Since the support for the absorber forms a unit together with the ignition chamber adjoining in front of it and possibly other devices such as a flame monitoring device etc., the absorber is preferably formed by fleece. When replacing the unit, the entire unit must be disassembled and replaced with a new one.
Replacement parts and repair costs are high.

[Problem of invention]

The present invention eliminates the above-mentioned problems, allows reliable sealing between the combustion air chamber and combustion parts, and between the combustion air chamber and the atmosphere with a simple structure, and further reduces repair costs. It is an object of the present invention to provide an evaporative burner of the type mentioned at the outset, which makes it possible to significantly reduce the cost of replacement parts.

[Means for Solving the Problems and Effects of the Invention] In the present invention, the support reaches into the combustion chamber, and an absorber capable of supplying liquid fuel through a fuel supply pipe is provided on the front surface of the support on the combustion chamber side. , an evaporative type heating system using liquid fuel, in particular for an auxiliary heating system for vehicles, in which an ignition chamber is adjacent to the back of the support, and an ignition device is arranged in this ignition chamber in front of the back of the support. The burner is characterized in that the ignition device is provided on a support member, which is connected to the absorber support and forms an ignition chamber.

The support member is preferably removably connected to the absorbent support.

In the inventive construction of the evaporative burner, the ignition device, such as a rod-shaped glow plug, is not guided to the outside through the housing part surrounding the burner, but is arranged in its own support element. This supporting element at the same time forms a part of the wall of the ignition chamber, so that in the case of the evaporative burner according to the invention, the conventional All sealing problems are eliminated.Therefore, in such constructions:
There is no need to provide sealing means for the seal between the part guiding the combustion air and the combustion parts and between the part guiding the combustion air and the atmosphere, since the combustion chamber and the ignition chamber This is because the exhaust gas does not leak into the surrounding area. Furthermore,
Evaporative burners are easy to maintain. This is because when the ignition device fails to operate, the ignition device itself can be replaced without throwing away the absorber support.

The same applies when the absorber has to be replaced.This structural separation of the support for the igniter and the support for the absorber combines all the previously mentioned advantages. can get.

In order to ensure that the ignition device is placed in the same position on the support member, the support member is provided with a holder for the ignition device, for example formed in the form of a recess.

This recess can be shaped to match the external contour of the ignition device, so that when installing the evaporative burner, the ignition device remains securely in place09 In the case of the evaporative burner according to the invention: Since a screw joint for the ignition device and a holder for the ignition device are not required, costly additional machining steps are omitted.

In a preferred embodiment, the absorber support is formed in the form of a forest, the ignition device support is inserted into the forest-formed absorber support, and at least part of the wall of the ignition chamber is is formed. As a result, the ignition device support member and the absorber support member are formed to fit into each other. This construction makes it possible to design the evaporative burner in a particularly space-saving manner viewed in the axial direction. Furthermore, since the igniter does not penetrate the housing surrounding the burner head, the evaporative burner itself can be shaped independently of the shape of the housing and adapted to the respective intended use. Particularly in the case of heating installations, the length of the burner head range can be shortened, and the ignition system can be adapted to the respective requirements independently of the axial geometry. .

In another preferred embodiment of the invention, the ignition device support and the absorber support are removably and fixedly connected to the combustion chamber. Thereby, in order to further shorten the length of the evaporative burner, the structure consisting of the support for the igniter and the support for the absorber is arranged in relation to the combustion chamber and axially fitted into one another. There is.

The fuel supply pipe is preferably guided through the igniter support and is fixed to the absorber support. By guiding the fuel supply pipe through in this way, it is possible during assembly to orient the parts of the evaporative burner that are arranged to fit together in a predetermined direction in a simple manner.

In the case of the structure of the evaporative burner according to the present invention, the parts fit together, so there is a possibility that fuel may leak from between the combustion chamber and the absorber support. A seal is provided to prevent leakage, but
Since the combustion chamber and the parts of the evaporative burner connected to it are designed as rotationally symmetrical parts, which do not require any other provision, the seal can be formed in a simple manner, for example by means of a sealing ring. be. This seal ring is used during assembly and when connecting the evaporative burner and combustion chamber.
It is pressed against the outer circumferential surface of the combustion chamber, ensuring a reliable seal.

In a preferred embodiment of the present invention, the igniter support member includes:
A flame monitoring device extending into the combustion chamber is additionally provided. This eliminates the need for guidance through the flame monitoring device.
and no sealing problems arise due to the passage guidance.Of course, the absorber support is provided with suitable passage openings for the flame monitoring device, so that this flame monitoring device cannot reach into the combustion chamber. The flame monitoring function can be reliably demonstrated.

To simplify the electrical wiring of the electrical connection conductor for the ignition device and/or the flame monitoring device, the connection conductor extends from the rear side of the ignition device support member opposite the ignition chamber;
It is guided to the appropriate control device. Such an arrangement of the electrical connection conductors is possible with the construction of the evaporative burner according to the invention. This is because the ignition device support member is provided in a relatively low temperature range of the burner head of the heating device.

In order to reduce production costs, it is preferable to permanently mount the ignition device on burner parts, such as support members, which are particularly easily replaceable, in which case the ignition device can be welded, brazed, etc. It can be fixed to the part concerned by. In this case, a screwed through guide or the like for fixing the ignition device to the heating device is omitted.

A further embodiment of the evaporative burner, which partially has the features of the previously described embodiments, is characterized in that the ignition device support is provided with an ignition device receptacle.

This receptacle is preferably designed as a bayonet receptacle and is inclined with respect to the axial direction of the support element.

This design of the evaporative burner is particularly simple to manufacture. This is because the ignition device, which is designed, for example, as a rod-shaped glow plug, can be arranged on the support element by means of the receptacle. In this case, the ignition device can be arranged replaceably on the support member during the plug-in connection, so that only the ignition device has to be replaced during repairs. Furthermore,
Easy to assemble. This is because this support member simultaneously
This is because it functions as a closing lid in an evaporative burner.

In a variant of this embodiment of the evaporative burner, the support member is
A spacer is provided on that surface on the side of the absorbent support.

This spacer is preferably designed as a projection. In this case, the spacer holds the back side of the absorbent support at a distance from the facing side of the support element, so that an air tension is created between the support element and the absorbent support for thermal insulation reasons. be done.

The support member preferably serves at the same time as a holder and a fixing member for the combustion tube surrounding the combustion chamber. Thereby, additional connection means between the support members;
Additional connection means with the combustion tube surrounding the combustion chamber can be omitted.

In particular, it has been found to be advantageous to form the support element as a die-cast part, in particular made of aluminum. In the case of this structure, the weight of the support member becomes lighter. This support member can be formed to be dimensionally stable and to minimize manufacturing tolerances.

This is particularly advantageous in mass production.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, the evaporative burner is indicated entirely by 1. This burner extends into the combustion chamber 3 of the heating device, which is of tubular design. The heating system uses liquid fuel and is an evaporative burner (other than the burner is not shown in detail).
includes a support 4 for an absorbent body 5. This absorbent body is formed, for example, by a disc-shaped fleece. The support body 4 for the absorbent body 5 is formed in a forest shape and includes a bottom surface (back surface) 6. An absorber 5 is provided on the support front surface 7 on the combustion chamber 3 side. A forest-like outer circumferential portion 8 connected to the bottom surface 6 extends from the front surface 7 to the side opposite to the combustion chamber 3 . The outer peripheral portion 8 and the bottom surface 6 of the support 4 for the absorbent body 5 form a part of an ignition chamber 9 provided in front of the support member 4 for the absorbent body 5.

The ignition chamber 9 is closed on the side opposite to the bottom surface 6 of the support 4 for the absorber 5 by a support member 10 for the ignition device 11. This ignition device is formed, for example, by a rod-shaped glow plug 12. The support member IO is provided with a recess 3. This recess preferably has a shape corresponding to the outer contour of the ignition device 11, and the rod-shaped glow plug 12, which acts as an ignition device 11 serving to orient and hold the ignition device rIt11 in the ignition chamber 9, is threaded. It is mounted in this recess 13 without using an attached protrusion. The electrical connection conductor 14 for the ignition device 211 extends from the rear side 15 of the lid-shaped support element 10 for the ignition device 11, for example.

Similarly, as can be seen from FIG. 1, a flame monitoring device 16 is further attached to the support member 10 for the ignition device 11.

This flame monitoring device reaches into the combustion chamber 3 and serves to monitor the flame in the usual manner.
so that the bottom surface supporting the ignition device 11 reaches into the ignition chamber 9 formed in cooperation with the bowl-shaped support 4 for the absorber 5;
It is formed. In this case, in order to shorten the length of the evaporative burner 1 in the axial direction, the evaporative burners 1 have a structure in which they fit together in the axial direction (a structure in which they are built into each other).

The support member 10 for the igniter 11 is preferably removably connected to the support 4 for the absorber 5 and to the burner chamber 3 . For this purpose, tongue pieces are preferably provided that protrude beyond the outer periphery of the burner chamber 3, the outer periphery of the support 4 for the absorbent body 5, and the outer periphery of the support member 10. This tongue piece is provided with a through hole.

This through hole allows for the connection of the parts, which are arranged in a straight line and fitted together, for example by means of bolts.

In the case of the above-described construction of the evaporative burner l, it is only necessary to provide one seal 17 for sealing, which seal ensures that the liquid fuel is connected to the combustion chamber 3 and the support 4 for the absorber 5.
Prevent leakage to the outside from between. This seal 17 is preferably formed as a seal ring provided on the outer circumferential surface of the circumferential portion 8 of the support 4 for the absorbent body 5 . The circumferential portion of the support preferably has an outwardly projecting circumferential edge in order to fix the position of the sealing ring 18. When the support 4 for the absorber 5 and the support member IO for the ignition device 11 are fixedly connected to the combustion chamber 3 using, for example, screws,
Since the seal ring 18 is compressed, the outer periphery between the combustion chamber 3 of the evaporative burner 1 and the corresponding parts is reliably sealed.

As can also be seen from the figure, the electrical connection conductor 19 for the flame monitoring device 16 likewise extends from the back side 15 of the support element 10 for the ignition device 11 so that it can be connected to the associated control device and power supply device. be. In order to supply liquid fuel to the absorber 5, the fuel supply pipe 20 passes through the support member 10 for the ignition device 11 and is fixed to the support member 4 for the absorber 5. In order to prevent the absorber 5 from sliding in the axial direction on the front side 7 of the support 4, a plurality of protrusions 21 distributed around the periphery and reaching into the combustion chamber 3 may be provided. When the parts of the burner l are fixedly connected to the combustion chamber 3, they act as a support member for the absorber 5.

In the case of an evaporative burner l constructed as described above, sealing problems are significantly reduced, as shown in the above embodiments. Because, to prevent liquid fuel leakage,
This is because only one seal 17 needs to be provided. No seals are required between the part of the evaporative burner l that guides the combustion air and the combustion components, and also no seals between the chamber that guides the combustion air and the atmosphere. This is because the exhaust gas does not leak from the gap between the ignition device 11. The evaporative burner l has its own support element 10 for the ignition device 11,
A flame monitoring device 16 is optionally attached to this support member, so that the ignition device 11 and, if necessary, the flame monitoring device i16 can be replaced independently of the support 4 for the absorber 5 and, if necessary, On the contrary, the absorber or support can be exchanged independently. This reduces repair and maintenance costs. Furthermore, the combustion chamber 3, the support body 4 for the absorber 5, and the support member IO for the ignition device 11
By fitting into each other, the length of the evaporative burner l is shortened.

An ignition device 11 such as a rod-shaped glow plug is attached to a support member 1
0 (not shown), this can be done, for example, by brazing, welding, etc. The support member 10 to which the ignition device 11 is fixed is easily removable in order to allow the ignition device 11 to be replaced if necessary.

FIG. 3 shows a modified embodiment of the evaporative burner l'. The same parts as in the above-described first embodiment shown in FIGS. 1 and 2 are given the same reference numerals and also
An I (dash) is added.

This second embodiment of the evaporative burner 1' differs from the first embodiment substantially in the following respects. That is, the difference is that the support member 10' for the ignition device 11', which also accommodates and holds the flame monitoring device 16', is formed as a die-cast part made of aluminum (in the case of the first embodiment, it is substantially Furthermore, in the case of an evaporative burner 1', the support member 10' is
0' is provided with a housing part 22 formed integrally with the main body, into which a rod-shaped glow plug 12' as an ignition device can be advantageously inserted.

Thereby, the rod-shaped glow plug 12' is attached to the support member 10.
' and can be replaced in some cases, for example for repair.

As shown in FIG. 3, unlike in the first embodiment, the accommodating portion 22 is not disposed perpendicularly to the central axis of the support member 10', but is disposed at an angle. . The free end of the ignition device 11' extends into the ignition chamber 9'. This ignition chamber is formed as a hollow space within a part of the support member 10'.

Further, the support member 10' is formed to simultaneously act as a closing lid and to accommodate and hold a combustion tube 26 surrounding the combustion chamber 3'. Since the seal 17, such as the seal ring 18 in the illustrated embodiment, can be omitted, the problems associated with such a seal do not arise, and at the same time the support member 10'
The production is simplified. Further, the support member 10' is provided with a plurality of spacers 24 on the surface 23 on the absorber 5' side.

The spacers are distributed on the surface 23 and are preferably formed as projections 25 . By means of the spacer 24, the support 4' for the absorbent body 5' is spaced apart from the support member 10', thereby insulating the support and the support member from mutual heat transfer. Absorber 5
As can be seen from the lower half of FIG. 3, an intermediate chamber is formed between the rear surface 15' of the support 4' and the facing surface 23 of the support member 10'. This intermediate chamber serves as a heat insulating air passage.

Compared to the first embodiment described with reference to FIGS. 1 and 2, the evaporative burner 1' according to the embodiment of FIG. 3 is technically simpler to manufacture. Thereby, production costs can be reduced, especially in mass production. Furthermore, the evaporative burner 1' requires a small installation space in its head space, the shape of the support 4' for the absorber 5' is simplified, and the support can be made as a separate component, for example from a sheet metal. .

The support 4' for the absorbent body 5' is placed in the correct position relative to the support member 10' by the spacer 24, and the mfi
It can also be placed in a regular position relative to the tube 26.

It should be noted that the present invention is not limited to the preferred embodiments shown in the drawings or the matters described above, and many modifications and variations can be made as necessary by those skilled in the art without departing from the spirit of the invention. In the case of the evaporative burner 1,1' according to the invention, a specific support element 1 is provided for the ignition device 111.11'.
0 is provided and this support member 10 is simultaneously connected to the ignition chamber 9.
It is important to partially surround 9'. Thereby, the support member 10.1 for the ignition bag W, 11.11'
Many functions are integrated in 0', and this function is supported by support 4.4.
', the evaporative burner 1.1' has a very space-saving design. In this case, the sealing problems that have conventionally occurred are also satisfactorily solved.

Reliable operation of an evaporative burner 1.1' of this type is therefore possible.

(Effects of the Invention) As explained above, according to the evaporative burner according to the present invention, the support member is removably connected to the absorber support forming at least a part of the wall of the ignition chamber, and Since the ignition device is placed in the support member, the threaded hole and seal that were provided in connection with the penetration guide of the ignition device are no longer required.
Furthermore, since the absorbent body support and the support member can be separated, repair costs and replacement parts costs can be significantly reduced.

In addition, a seal ring is provided around the outer periphery of the support body to seal the space between the support body and the combustion chamber, thereby sealing the space between the combustion chamber and the combustion components and between the combustion chamber and the atmosphere with a simple structure. can do.

[Brief explanation of the drawing]

Figure 1 is a schematic axial sectional view of the evaporative burner installed in the combustion chamber, Figure 2 is a schematic exploded view of the parts of the evaporative burner, and Figure 3 is another embodiment of the evaporative burner. FIG. 2 is a schematic axial cross-sectional view similar to FIG. 1, showing a state in which the engine is installed in a combustion chamber. 1.1'...Evaporative burner, 3.3'...Combustion chamber 4.4...Support, 5.5'...Absorber, 6.
... Back, 7.7'... Front, 9.9'... Ignition chamber l0110... Support member, 11.11' Ignition device, 20.20... Fuel supply pipe.

Claims (1)

[Claims] 1. The support reaches into the combustion chamber, and an absorber capable of supplying liquid fuel via a fuel supply pipe is provided on the front surface of the support on the combustion chamber side, an ignition chamber is adjacent to the back of the support, and the support is placed in the ignition chamber. In an evaporative burner for a heating system using liquid fuel, in particular for an auxiliary heating system for vehicles, in which the ignition device is arranged in front of the back of the support member (10; 10 ′)
An evaporative type characterized in that the support member is connected to a support (4; 4') for the absorber (5; 5') and forms an ignition chamber (9; 9'). Burna. 2. 2. Evaporative burner according to claim 1, characterized in that the support member (10) is provided with a recess (13) for holding and orienting the ignition device (11). 3. 3. Evaporative burner according to claim 2, characterized in that the recess (13) is shaped to match the outer contour of the ignition device (11). 4. The support member (10; 10') is the absorber (5; 5')
4. Evaporative burner according to claim 1, characterized in that it is removably connected to a support (4; 4'). 5. The support body (4; 4') for the absorber (5; 5') is formed in the shape of a bowl, and the support member (10) for the igniter (11) is inserted into the support body (4) formed in the shape of a bowl. , ignition chamber (9)
The evaporative burner according to any one of claims 1 to 4, characterized in that the burner forms at least a part of a wall of the evaporative burner. 6. The ignition device (11; 11') is a rod-shaped glow plug (
12; 12'). The evaporative burner according to any one of claims 1 to 5. 7. Support member (10; 1) for igniter (11; 11')
0') and the support (4; 4') for the absorber (5; 5'),
7. Evaporative burner according to claim 1, characterized in that it is removably and fixedly connected to the combustion chamber (3; 3'). 8. The fuel supply pipe (20:20') is connected to the ignition device (11;
11') and is fixed to the support (4; 4') for the absorbent body (5; 5'). 8. The evaporative burner according to claim 7. 9. Combustion chamber (3) to prevent leakage of liquid fuel
and the support (4) for the absorber (5), a seal (17)
The evaporative burner according to any one of claims 1 to 8, characterized in that it is provided with a. 10. Evaporator according to claim 9, characterized in that the seal (17) is formed as a sealing ring (18), which sealing ring is attached to the outer surface of the bowl-shaped support (4) for the absorber (5). Type burner. 11. Support member (10; for igniter (11; 11'))
10') is additionally provided with a flame monitoring device (16; 16') extending into the combustion chamber (3; 3'). One of the mentioned evaporative burners. 12. Electrical connection conductor (14) for igniter (11; 11') and/or flame monitoring device (16; 16')
, 19; 14', 19') is the ignition device (11; 11')
) support member (10; 10'), ignition chamber (9; 9')
12. Evaporative burner according to claim 1, characterized in that the burner extends from the rear side (15; 15') opposite to the evaporative burner. 13. 13. Evaporative burner according to claim 1, characterized in that the ignition device is removably attached to the burner part (10). 14. 14. Evaporative burner according to claim 13, characterized in that the ignition device is attached to the support member (10). 15. Claim 13 or Claim 1, characterized in that the igniter is welded or brazed to the burner part.
4. The evaporative burner described in 4. 16. Claims 1, 4 to 8, 11 and 11, characterized in that the support member (10') for the ignition device (11') has a receptacle (22) for the ignition device (11'). 12. The evaporative burner according to any one of 12. 17. 17. Evaporative burner according to claim 16, characterized in that the receptacle (22) is designed as a bayonet receptacle. 18. 18. Evaporative burner according to claim 16 or 17, characterized in that the housing part (22) is arranged obliquely with respect to the axial direction of the support member (10'). 19. The support member (10') has a spacer (24) for the support (4') of the absorbent body (5') on its surface (23) on the side of the support (4') for the absorbent body (5'). The evaporative burner according to any one of claims 16 to 18, characterized in that it comprises: 20. 20. Evaporative burner according to claim 19, characterized in that the spacer (24) is designed as a projection (25). 21. A combustion tube surrounds the combustion chamber, and a support member (
10') simultaneously surrounds the combustion chamber (3').
26) Evaporative burner according to any one of claims 16 to 20, characterized in that it serves as a holding and fixing member for 26). 22. 22. Evaporative burner according to claim 16, characterized in that the support element (10') is designed as a die-cast part, in particular made of aluminum.