JPS58142144A - Combustion equipment for room heating - Google Patents

Abstract

PURPOSE:To prevent the temperature nonuniformity of hot air and the like from producing by a structure wherein a space to circulate with room air is provided surrounding a combustion cylinder and further a space, in which combustion gas flows, is provided outside said space and the exhaust gas and the room air is heat-exchanged with each other through a combustion cylinder wall and an exhaust gas chamber wall. CONSTITUTION:A burner 11 is provided at the lower end of a combustion cylinder 10, the upper end of which is communicated through a pluraity of radially arranged passages 12 to an exhaust gas chamber 13 concentrically encircling the combustion cylinder 10. An exhaust tube 14, which is open outside a room, is communicated to the exhaust gas chamber 13, at the upper part of which an end plate 16 equipped with a suction tube 15 at its center is mounted so as to form a space 17 in the upper part of the combustion cylinder 10. A fan 19, which is driven by a motor 18 in order to suck room air from the suction tube 15, is arranged within the space 17. At the same time, a fan 21 to exhaust the combustion cylinder 10 of gas is mounted to the lower end of the driving shaft 20 of the fan 19. Furthermore, an air feeding chamber 22 is provided in such a manner as to cover the lower part of the combustion cylinder 10 and yet the spacd 25 formed between the combustion cylinder 10 and the exhaust gas chamber 13 is communicated to the room through an opening 26.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heating combustion device that performs heating by burning gas, oil, or the like.

[Technical background of the invention]

Currently, the mainstream of heating devices is the FF type, which takes in combustion air from outside and releases exhaust gas outside to keep indoor air clean.

A typical example is shown in FIG.

That is, a burner 2 is provided at the bottom of the combustion tube 1,
- A heat exchanger 4 is connected to the upper part, into which the combustion exhaust gas generated in the combustion chamber 3 in the combustion tube 1 is introduced. Combustion air is supplied to the burner 2 by an intake/exhaust fan 6 through an intake pipe 5 that opens outdoors, and the exhaust gas that has passed through the heat exchanger 4 is supplied through an exhaust pipe 7 that is concentrically surrounded by the intake pipe 5. In other words, the intake pipe 5, fan 6, combustion pipe 1, heat exchanger 4, and exhaust pipe 7 form one closed circuit, and combustion occurs indoors. This is done without using any air at all, and the exhaust gas is not released into the room.Indoor air is circulated through the heat exchanger 4 by an indoor air circulation fan 8, and the indoor air is heated, i.e. Heating is provided. In the figure, 9 indicates the fuel supply pipe.

[Problems with background technology]

1) With the above-mentioned conventional heating system, it is not possible to effectively blow indoor air over the entire high-temperature wall surface such as the combustion cylinder wall surface or the heat exchanger wall surface, and especially during weak combustion, there is There was a drawback that heat exchange was insufficient, resulting in temperature unevenness in the warm air flow after passing through the heat exchanger. The presence of such temperature unevenness is undesirable as it gives discomfort to the occupants. Also, for intake and exhaust,
Since each fan for indoor air circulation is provided independently, it tends to be expensive and consumes a large amount of electricity.

Furthermore, a heat exchanger is provided independently of the combustion tube, i? )
This makes it large and difficult to install in a small room.

[Purpose of the invention]

The present invention is based on the above-mentioned circumstances and provides a heating combustion device that does not cause temperature unevenness in the obtained hot air flow, consumes only a small amount of electric power, and can be made inexpensive and compact. The purpose is 1. Te(・ru,.

[Summary of the invention]

According to the present invention, the indoor air surrounding the combustion tube is
1. A circulating space is provided, and a space is provided outside the space for the combustion exhaust gas to flow, and a fan driven by a single motor generates a flow in each of the spaces. has been achieved.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 2, a burner 11 is provided at the lower end of the combustion tube 10, and one end of the burner 11 connects the combustion tube 10 concentrically through a plurality of radially arranged passages, only two of which are shown as 12 in the figure. It communicates with an exhaust chamber 13 having an annular cross section surrounding the combustion tube L and extending from the combustion tube L side to near its lower end. An exhaust pipe 14 that opens to the outside is passed through the exhaust chamber 13 for one vehicle.

At the top of the exhaust chamber 13, there is an end plate 1 having a suction cylinder 15 in the center.
6 is removed, and a space 17 with a circular cross section is formed above the combustion tube 10. Inside this space 17 is a motor I8.
A fan 19 is arranged to be driven by a fan 19 to suck indoor air from the suction cylinder 15. Further, the drive shaft 20 of the fan 19 passes through the upper wall of the combustion tube 10, and a fan 21 for exhausting the inside of the combustion tube 10 is attached to the shaft end. Furthermore, an air supply chamber 22 is provided covering the lower part of the combustion tube 10, and an air supply pipe 23 opening to the outside is communicated with the air supply chamber 22. An air supply port 24 is provided.Furthermore, the combustion tube 1
The annular space 25 between the exhaust chamber 13 and the exhaust chamber 13 communicates with the interior of the room through an opening 26 at its lower part. 27 in the diagram
Reference numeral 28 indicates a fuel supply pipe, and 28 indicates a baffle provided at the top of the combustion cylinder.

- In the device of the present invention having the configuration shown in F, exhaust is exhausted by the L/F7 fan 21 in the combustion tube 1o, and the outside air sucked in from the air supply pipe 23 is involved in combustion in the combustion tube 10, and the high-temperature combustion exhaust gas The gas is then discharged to the outside through the exhaust pipe 14 via the passage 12 and the inside of the exhaust chamber 13. On the other hand, indoor air is sucked from the suction tube 15 by the fan 19 and while descending through the annular space 25, the air is drawn into the wall surface of the combustion tube 10 and
Heat exchanges with the high temperature combustion exhaust gas through the wall of 3.
The hot air is released into the room from the opening 26.

As is clear from the above, the high-temperature flue gas generated by combustion and the indoor air exchange heat through the combustion cylinder wall and the exhaust chamber wall, and there is no direct contact and mixing between the two. Therefore, indoor air will not be polluted. Furthermore, since heat is exchanged between the indoor air and the high-temperature combustion exhaust gas through the entire walls of the combustion tube and the exhaust chamber, heat exchange is performed with high efficiency and no temperature unevenness occurs in the hot air.

In addition, as is clear from the above, the space for heat exchange is not separated from the combustion tube as in the past, but is provided as an integral part surrounding the combustion tube, which reduces the size of the entire heating device. be able to. Furthermore, since the fan that exhausts the inside of the combustion cylinder and the fan that circulates indoor air are driven by the same motor, power consumption can be reduced.

Although the fan drive shaft 20 passes through the upper wall of the combustion chamber, the pressure inside the space 17 is slightly higher than atmospheric pressure because it is on the discharge side of the fan 19, and the upper part of the combustion cylinder is on the suction side by the fan 21. Therefore, since the pressure is slightly lower than atmospheric pressure, there is no risk of exhaust gas flowing out into the space 17 from the penetrating portion, and therefore, the indoor air will not be contaminated by it.

The present invention is not limited to the above embodiments. For example, the second
As shown in FIG. 3, in which the same parts as in the figure are given the same reference numerals, instead of the radial passage 12 that communicates the exhaust chamber 13 and the inside of the combustion tube 10 in FIG. 2, a circular space and a space 25 with an annular cross section
Pipe lines 29 communicating with each other may be distributed on the circumference so that the inside of the combustion cylinder 0 and the exhaust chamber 13 are communicated through the spaces between the pipe lines 29.

〔Effect of the invention〕

According to the present invention having the above configuration, it is possible to obtain a compact and highly efficient heating device, and it is possible to obtain a heating device suitable for installation in a small room.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a conventional device, FIG. 2 is a schematic diagram of an embodiment of the present invention, and FIG. 3 is a schematic diagram of a modification thereof. 10 Combustion tube, 11 Burner, 12 Passage, ]3 Exhaust chamber, 14 Exhaust tube,
15. Suction tube, □: 16. Upper end plate, 17. Space, 18...
Motor, 19.2 fan, 20... fan drive shaft, 22... air supply chamber, 23 supply cylinder,
24・Air supply port, 25・Space, 2
6...Opening, 27...Fuel supply pipe application agent Patent attorney Gobe Kikuchi

Claims (1)

[Claims] A combustion tube that has a burner at its lower end and is surrounded by an air supply chamber whose outer periphery of the lower end is connected to the outside air is connected to the combustion tube through a passage placed in the upper part of the combustion tube, and an annular space is created between the outer periphery of the combustion tube and the combustion tube. an exhaust chamber that remains and has an annular cross section that surrounds the combustion tube and communicates with the outside air; a fan that circulates indoor air within the annular space; and a fan that is provided in the same 11 as this fan and exhausts the inside of the combustion tube. A heating combustion device characterized by having: