JPH0445723B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a pulse combustion device that can be used as a heat source for a heater such as a hot-air heater.

[Technical background of the invention and its problems]

FIG. 4 shows a schematic configuration of a pulse combustion device used as a heat source for a water heater. 1 is a hot water storage tank of the water heater, and 2 is a combustion chamber of the pulse combustion device disposed within the hot water storage tank 1. A mixing chamber 3 disposed outside the hot water storage tank 1 is connected to the upstream side of the combustion chamber 2, and a tail pipe 4 disposed inside the hot water storage tank 1 is connected to the downstream side of the combustion chamber 2. are connected. Further, in the mixing chamber 3, an air supply path 7 in which various components such as an air flapper valve 5 and a combustion fan 6 were interposed, and various components such as a fuel flapper valve 8 and a gas cushion tank 9 were interposed. The fuel supply paths 10 are connected to each other. Further, on the downstream side of the tail pipe 4, a decoupler 11, for example a parallel pipe type multi-tube heat exchanger 12, an exhaust passage 13, etc. are successively connected. In this case, Dekatsupura 1
1 and the multi-tube heat exchanger 12 are arranged in the hot water storage tank 1 together with the combustion chamber 2 and the tail pipe 4, and are used as a heating section for the water contained in the hot water storage tank 1.

By the way, in the case of the conventional configuration, each component of the combustion gas flow passage used as the heating part of the main body of the pulse combustion apparatus, namely the combustion chamber 2, tail pipe 4, decoupler 11, multi-tube heat exchanger 12, etc. Since these components were manufactured separately and connected by means such as welding during assembly, the manufacturing of each component and the work of connecting each component were troublesome. This resulted in the problem of high costs.

Therefore, as shown in FIGS. 5 and 6, there is a combustion chamber configuring space 21 inside, and a plurality of tail pipe configuring spaces 2 connected to this combustion chamber configuring space 21.
2... and a space 23 for forming an exhaust pipe are integrally molded by casting, and this heater unit 24 is disposed in a hot water storage tank 25 of a water heater, and this heater unit 24 for configuring the tail pipe 22 and one end side opening surface of the space 23 for configuring the exhaust pipe are connected via the header part 27 in the header cover 26, and for configuring the combustion chamber of the heater unit 24. Space part 21
A mixing chamber 28 and an exhaust chamber 29 are connected to the opening surface of the other end of the exhaust pipe forming space 23 to form a combustion chamber, a plurality of tail pipes, and an exhaust pipe inside the heater unit 24, respectively. What has been done is considered.

However, in this case the heater unit 2
4 was integrally molded by casting, so when manufacturing the heater unit 24, the same space as the combustion chamber configuring space 21, the plurality of tail pipe configuring spaces 22... and the exhaust pipe configuring space 23 was used. It is necessary to place a shaped core inside a mold for forming the heater unit, pour high-temperature molten metal into the mold, and remove the core from the casting after the casting is formed. Therefore, the combustion chamber, multiple tail pipes, and exhaust pipes inside the heater unit 24 must be formed into a relatively simple shape, such as a right cylindrical shape.
It is difficult to maintain a uniform surface temperature of the entire heater unit 24 during pulse combustion, making it difficult to improve heating efficiency, and the mold for the heater unit 24 is relatively expensive, leading to high costs. There was also a problem.

[Purpose of the invention]

This invention not only simplifies the production of each component of the combustion gas flow passage used as the heating section of the pulse combustion apparatus main body, but also makes the surface temperature of the entire heating section unit uniform during pulse combustion, thereby improving heating efficiency. It is an object of the present invention to provide a pulse combustion device that can improve the performance of the combustion engine and also reduce the cost.

[Summary of the invention]

This invention provides both a first and a second divided body made of casting and having a recessed part for forming a combustion gas flow passage of the main body of a pulse combustion device on the joint surface, and
The heating unit is characterized by having a heating section unit in which a combustion gas flow passage forming space is formed by the recessed portion by joining the joint surfaces of the second two divided bodies.

[Embodiments of the invention]

FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 shows a schematic configuration of the main parts of a pulse combustion apparatus that can be used as a heat source for a heater such as a hot-air heater, and 41 is a heating unit. Inside this heating unit 41, there is a combustion chamber 4 that forms a combustion gas flow passage forming space.
2, a tail pipe section 43, a large coupler section 44, and a heat exchanger section 45 are provided, respectively. In this case, the combustion chamber section 42 is formed at the center of one end of the heating section unit 41, and the large coupler section 44 is formed at the end section on the other end side of the heating section unit 41. The section 45 is the heating section unit 4
They are formed on both sides of the center line O of 1, respectively.
Furthermore, the tail pipe portion 43 has one end (combustion gas inflow end).
A first linear passage 46 whose side is connected to the combustion chamber part 42 and whose other end extends toward the large coupler part 44, and which is formed approximately parallel to this first linear passage 46 and whose one end is semicircular. A second linear passage 48 connected to the other end of the first linear passage 46 via an arcuate curved passage 47 is formed approximately parallel to the first and second linear passages 46, 48. At the same time, one end (combustion gas outflow end) is connected to the large coupler part 44, and the other end is connected to the other end of the second linear passage 48 via a semicircular curved passage 49. It is formed by a straight passage 50. Further, the heat exchanger section 45 is arranged on the outer side of the tail pipe section 43. Furthermore, this heat exchanger section 45
The one end (combustion gas inflow end) side is connected to the big coupler part 4.
4 and whose other end extends toward the combustion chamber 42 side, the first linear passage 51 is formed approximately parallel to this first linear passage 51 and has one end formed in a semicircular curved shape. A second linear passage 5 connected to the other end of the first linear passage 51 via a passage 52
3. It is formed substantially parallel to the first and second linear passages 51 and 53, and one end (outflow end of combustion gas) is connected to the outflow port 54 of the heating section unit 41, and the other end is formed in a semicircular arc shape. A third channel connected to the other end of the second linear channel 53 via the curved channel 55
It is formed by a straight passage 56. The heating unit 41 is formed so that both sides are symmetrical about the center line O.

On the other hand, the heating unit 41 is made up of first and second divided bodies 58, 59 each having a substantially flat plate shape and separately cast.
It is made by joining and integrating. Further, as shown in FIG. 2, a recessed portion for forming a combustion gas flow passage of the pulse combustion apparatus main body, that is, a combustion chamber portion is formed in the joint surface 60 of the first divided body 58 with the second divided body 59 side. A recessed portion 61 for forming a tail pipe portion, a recessed portion 62 for forming a tail pipe portion, a recessed portion 63 for forming a large coupling portion, and a recessed portion for forming a heat exchanger portion 64 are formed, respectively. Furthermore, the first divided body 5 is also attached to the joint surface 60′ of the second divided body 59 with the first divided body 58 side.
A combustion chamber forming recess 61' having approximately the same shape as the 8 side;
A concave part 62' for forming a tail pipe part, a concave part 63' for forming a large coupling part, and a concave part 64' for forming a heat exchanger part are formed, respectively. In addition, the first divided body 58
And the second divided body 59 has joint surfaces 60, 60'.
Attachment flanges 65..., 66... are formed on the outer surface of the vicinity, respectively. The first and second divided bodies 58 each having a substantially flat plate shape are separately cast.
59 are joined and integrated, the first and second divided bodies 58, 59 have combustion chamber forming recesses 61, 61', tail pipe forming recesses 62, 62',
The combustion chamber part 42, tail pipe part 43,
A large coupler part 44 and a heat exchanger part 45 are formed respectively. Note that there is a mixing chamber 28 (shown in FIG. 5) upstream of the combustion chamber 42 of the heating section unit 41, and an exhaust chamber 29 (shown in FIG. 5) downstream of the outlet 54 of the heat exchanger section 45. ) are linked together.

Therefore, in the case of the above-mentioned structure, the heating section has a combustion chamber section 42, a tail pipe section 43, a large coupler section 44, and a heat exchanger section 45, each of which forms a combustion gas flow passage forming space therein. unit 41
Therefore, each component of the combustion gas flow path, such as the combustion chamber, tail pipe, decouple, multi-tube heat exchanger, etc. used as the heating part of the pulse combustion equipment main body, was manufactured separately, and during assembly. The heating section of the pulse combustion apparatus main body can be manufactured more easily than in the case where these components are connected.

In addition, the first divided body 58 of the heating section unit 41
A recessed portion 61 for forming a combustion chamber portion, a recessed portion 62 for forming a tail pipe portion, a recessed portion 63 for forming a large pulley portion, and a recessed portion for forming a heat exchanger portion 64 are formed on the side joint surface 60, and the second division is performed. Also on the joint surface 60' on the side of the body 59, there are a recessed part 61' for forming a combustion chamber part, a recessed part 62' for forming a tail pipe part, and a recessed part 63 for forming a large coupling part, which have substantially the same shape as those on the side of the first divided body 58. ', a substantially flat plate-shaped first and second divided body 5 formed with a concave part 64' for forming a heat exchanger part and separately cast.
8, 59 are joined and integrated, the first and second divided bodies 58, 59 have combustion chamber forming recesses 61, 61' and tail pipe forming recesses 62, 6.
2', the recessed parts 63 and 63' for forming the large plastic part, and the recessed parts 64 and 64' for forming the heat exchanger part to form the combustion chamber part 42 and the tail pipe part 4 inside the heating part unit 41.
3. Since the large coupler part 44 and the heat exchanger part 45 are each formed, the first divided body 58
Further, when manufacturing the second divided body 59 by casting, a core can be made unnecessary. Therefore, compared to the case where the heater unit 24 shown in FIGS. 5 and 6 is integrally molded by casting, manufacturing of the heating part of the pulse combustion apparatus main body can be made easier, and costs can be reduced. can.

Furthermore, since the first divided body 58 and the second divided body 59 can be cast using a mold consisting of an upper mold and a lower mold, they can be cast as in the heater unit 24 of FIGS. 5 and 6. It is not necessary to form the combustion chamber, the plurality of tail pipes, and the exhaust pipe inside the heater unit 24 into a relatively simple shape such as a right cylindrical shape.
Therefore, the combustion chamber section 42 of the heating section unit 41,
Tail pipe section 43, large coupler section 44, heat exchanger section 45
The shape of the heating unit 41 can be designed to be relatively complicated, and the heating section unit 41 as a whole can be downsized.

In addition, since the shape of the combustion gas flow passage forming space inside the heating section unit 41 can be freely designed, pulse combustion The surface temperature of the entire heating section unit 41 inside can be made uniform, and heating efficiency can be improved.

Note that this invention is not limited to the above embodiments. For example, as shown in FIG. 3, resonance type mufflers 71, 71 of appropriate capacity are connected to the intermediate portion of the heat exchanger section 45 forming the combustion gas flow passage forming space inside the heating section unit 41. You may also do so. Furthermore, the shapes of the combustion chamber section 42, tail pipe section 43, decoupler section 44, and heat exchanger section 45 are not particularly limited, and may be, for example, circular, rectangular, spiral, or the like. Furthermore, it goes without saying that various other modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

According to the present invention, both the first and second divided bodies made of casting are provided, each of which has a concave portion formed in the joint surface for forming a combustion gas flow passage of the pulse combustion device main body, and both of these first and second divided bodies are provided. By joining the joint surfaces of the divided bodies, a heating section unit is provided in which a space for forming a combustion gas flow passage is formed by the recessed portion. In addition to making it easier to manufacture the components, it is possible to equalize the surface temperature of the entire heating section unit during pulse combustion, improving heating efficiency, and in addition, reducing costs. .

[Brief explanation of drawings]

1 and 2 show one embodiment of the present invention, FIG. 1 is a perspective view showing the heating section unit, FIG. 2 is a perspective view showing the first divided body, and FIG. 3 is a separate perspective view. A perspective view showing the first divided body of the embodiment, the fourth
The figure is a vertical cross-sectional view showing the schematic configuration of a conventional pulse combustion device, FIGS. 5 and 6 show a conventional example different from that in FIG. 4, and FIG. 5 is a schematic diagram of the main parts of the pulse combustion device. FIG. 6 is a longitudinal cross-sectional view showing the structure, and FIG. 6 is a perspective view showing the heater unit integrally formed by casting. 41... Heating section unit, 42... Combustion chamber part (combustion gas flow passage forming space, 43... Tail pipe part (combustion gas flow passage forming space), 44... Big coupler part,
45... Heat exchanger section, 58... First divided body, 5
9...Second divided body, 60, 60'...Joint surface,
61, 61'... recessed part for forming a combustion chamber part, 62,
62'... Recessed part for forming tail tube part, 63, 63'...
Recessed portions for forming a large plastic portion, 64, 64'... Recessed portions for forming a heat exchanger portion.

Claims (1)

[Claims] 1. A first and second divided body made of cast material having a recessed part for forming a combustion gas flow passage of the pulse combustion device main body is formed on the joint surface, and the first and second divided bodies are joined. 1. A pulse combustion device comprising a heating section unit whose surfaces are joined to form a combustion gas flow passage forming space by the recessed portion.