JP2001304558A - Fireplace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a thermal efficiency and safety characteristic of a fireplace. SOLUTION: This fireplace is comprised of a burner part 12 for igniting fuel G at the outer surface of a color rendering member 5 arranged at a combustion space 7 facing against an interior part and a gas discharging passage 15 for use in feeding or guiding out discharged gas E after combustion which is discharged out of the combustion space 7 and to an outdoor area. Further, this fireplace is comprised of an air passage 16 for feeding combustion air A utilized for combustion of the fuel G from outside; a forced aeration fan 17 for use in discharging the discharged gas E from the discharging passage 15 to the outdoor area; and a heat exchanging means 14 for performing a heat exchanging operation between the discharged gas E in the discharging passage 15 and the combustion air A in the air passage 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A burner section for burning fuel on the outer surface of a staging member provided in a combustion space facing an interior of a room, and an exhaust passage for guiding burned exhaust gas discharged from the combustion space to the outside. The present invention relates to a fireplace for viewing the combustion state of the effect member from inside a room.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional fireplace is installed on a floor 21 on the indoor side of a wall 20 that separates a room from the outside. From the combustion space 107 facing the room, a plurality of false woods 105 as effect members provided in the combustion space 107, a burner unit 112 for burning fuel G on the outer surface of the false wood 105, and the combustion space 107. A chimney 115 is provided to guide the exhausted exhaust gas E after combustion to the outside. Further, the burner section 112 is provided below the grate 103 forming the floor of the combustion space 107, and the fuel nozzle 1
The fuel gas G of the natural gas-based city gas 13A supplied from 13 is jetted into the gap of the fake tree 105 above the grate 103, and the fuel G is diffused or partially premixed and burned on the outer surface of the fake tree 105 to shine. An effect is created in which the false wood 105 is seen to be burning from inside the room through the heat-resistant glass 102 by setting it to a flame state. In addition, a fire-resistant heat insulating member 4 is provided above the combustion space 107, on the side surface, and on the wall 20 side. In the space where the burner section 112 is provided, an air port 117 that opens into the room is provided.

In such a fireplace, the combustion space 107
The exhaust gas E discharged from the exhaust port is discharged to the outside through the chimney 115 by its own buoyancy, and the flow of the exhaust gas E
From there, combustion air A flows into the space below the grate 103 and is used for combustion of the fuel G in the combustion space 107.

[0004]

In such a conventional fireplace, the heat obtained from the fireplace indoors is limited to the flame through the heat-resistant glass 102 and the radiation from the fake wood 105 and the wall surface of the combustion space 107. However, even when the radiation from the brick 122 that decorates the chimney penetrating the room upward is applied, the thermal efficiency is as low as at most about 20% to 30%. There is a fireplace body 101 used as a heat transfer surface and convection heat transfer using natural convection of room air is added, but the effect of improving thermal efficiency is small. Also, since the purpose of the fireplace is to produce a beautiful combustion state in the combustion space 107, the combustion method is diffusion combustion or partial premixed combustion mixed with some primary air. Soot is generated. The soot accumulates on the chimney 115 for a long period of time, causing poor exhaust. Further, when the wind is strong outdoors, there is a danger that the exhaust gas will flow back into the room. Furthermore, since the temperature of the exhaust gas discharged is high as can be seen from the low thermal efficiency, it is difficult to forcibly discharge the high-temperature exhaust gas to the outside by a suction fan and prevent the exhaust gas from flowing back indoors. there were.

Accordingly, an object of the present invention is to solve the above-mentioned conventional problems and to realize a fireplace with high thermal efficiency and high safety.

[0006]

According to a first aspect of the present invention, there is provided a fireplace in which an air passage for introducing combustion air used for combustion of the fuel into the combustion space from the outside. A forced-ventilation fan that discharges the exhaust gas from the exhaust path to the outside and sucks the combustion air from the outside into the air path; the exhaust gas in the exhaust path and the combustion air in the air path A heat exchange means for exchanging heat with the heat exchanger.

[Effects] As in the present configuration, combustion air is supplied from outside of a fireplace indoors or outdoors through an air passage by a forced ventilation fan such as a pushing fan provided in an air passage or a suction fan provided in an exhaust passage. While inhaling, the exhaust gas generated from the combustion space is exhausted to the outside via the exhaust path, and there is no possibility that the exhaust gas flows out into the room. Therefore, forced ventilation can be performed in the combustion space in a preferable state. Furthermore, by providing heat exchange means for exchanging heat between the exhaust gas discharged from the combustion space and the combustion air supplied to the combustion space, the temperature of the exhaust gas discharged to the outside is reduced, and the combustion air is reduced. Preheating can improve the thermal efficiency. Therefore, it is possible to realize a fireplace having high thermal efficiency and capable of forcibly discharging exhaust gas to the outside.

[Structure 2] The fireplace according to the present invention is characterized by claim 2
As described in the above, in addition to the configuration of the fireplace of Configuration 1 above,
The combustion space is airtightly partitioned with respect to the room, and a transparent plate member that makes a combustion state in the combustion space visible from the room is provided.The forced ventilation fan is provided in the air passage or the exhaust passage. It is a unique fan.

[Function and Effect] As in the present configuration, while maintaining the visible state of the combustion state in the combustion space from the room,
A heat-resistant glass or the like that separates the combustion space from the room is provided as a transparent plate to make the combustion space airtight to the room, and at least one of a forced fan provided in an air passage or a suction fan provided in an exhaust passage is provided as a forced ventilation fan. Thus, the exhaust gas can be discharged to the outside while sucking the combustion air into the interior, and a fireplace with high thermal efficiency can be configured with a simple configuration. Further, when only the suction fan for the exhaust passage is provided, the pressure of the combustion space is set to a negative pressure state, thereby preventing the exhaust gas from leaking into the room. On the other hand, as a countermeasure against soot generated from the combustion space, it is preferable that the forced ventilation fan be only a forced fan in the air passage.

[Structure 3] A fireplace according to the present invention is characterized by claim 3
As described in above, in addition to the configuration of the fireplace of the above configuration 1 or 2, the burner portion is provided below the combustion space, and the air passage is provided on the back surface side with respect to the room of the combustion space. An air space partitioned from the combustion space by a partition wall, and an air pipe communicating between the air space opening and the outside provided above the air space, and the exhaust path is provided above the combustion space. The heat exchanger is constituted by an exhaust pipe for communicating a combustion space opening provided on the partition wall side with the outside, and the heat exchange means is provided over the air space opening and the combustion space opening, and the heat exchange means is provided from the combustion space. A heat storage type heat exchange means for storing sensible heat of the exhaust gas flowing into the combustion space opening in the heat storage section and preheating combustion air flowing into the air space from the air space opening by the stored heat. The features.

[Effects] As in the present configuration, an air space provided with an air introduction port for introducing air into the combustion space or the burner section is separated from the combustion space by a partition on the back side with respect to the interior of the combustion space. With this arrangement, the partition walls are heated by the combustion in the combustion space, and the combustion air in the air space can be preheated by the radiation. Further, since the combustion space and the air space are provided adjacent to each other, a small rotary heat storage type heat exchanger or the like is provided over the air space opening and the combustion space opening provided above each space. Can be provided as heat exchange means, and the size of the fireplace can be suppressed. The preheat of the combustion air increases the rate at which soot burns in the combustion space.
Chimney soot clogging is also suppressed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fireplace according to the present invention will be described with reference to the drawings. The fireplace shown in FIG. 1 is installed on a floor 21 on the indoor side of a wall 20 that separates indoors and outdoors, and inside a fireplace main body 1, a combustion space 7 facing the room through a heat-resistant glass 2, A plurality of false woods 5 as effect members provided in the combustion space 7 and a burner unit 12 for burning the fuel G on the outer surface of the false wood 5 are provided. The burner section 12 is provided below the grate 3 forming the floor of the combustion space 7, and is provided between the fuel gas of the natural gas-based city gas 13 A supplied from the fuel nozzle 13 and some primary air. The air-fuel mixture is jetted into the gaps between the false woods 5 above the grate 3, and the fuel G is partially premixed and burned on the outer surface of the false woods 5 into a bright flame state. Performs a production that looks like it is burning. Further, a fireproof heat insulating member 4 is provided above and on the side surface of the combustion space 7 and on the wall 20 side of the air space 9 described later. The configuration described so far is the same as the conventional one, but the fireplace of the present invention is characterized by the configuration of the supply and exhaust of the combustion air A and the exhaust gas E, and the configuration will be described below.

That is, a partition wall 6 having an air inlet 11 for introducing combustion air A into the combustion space 7 is provided on the back side of the interior of the combustion space 7, and further on the back side of the partition wall 6. An air space 9 partitioned from the combustion space 7 is formed, and the air space 9 extends below the grate 3 where the burner 2 is provided.

A rotary heat storage unit which is rotated by a motor 14b over a combustion space opening 8 provided on the partition 6 side above the combustion space 7 and an air space opening 10 provided above the air space 9. Rotary heat exchanger 14 with 14a
(An example of heat exchange means) is provided, and the heat of the exhaust gas E flowing from the combustion space 7 into the combustion space opening 8 is
The combustion air A flowing into the air space 9 from the air space opening 10 can be heated by the stored heat.

The air space opening 10 side of the rotary heat exchanger 14 is connected to an air pipe 16 communicating with the outdoors, while the combustion space opening 8 side of the rotary heat exchanger 14 communicates with the outdoors. The suction pipe 17 is connected to the exhaust pipe 15, and a suction fan 17 (an example of a forced ventilation fan) is provided in the exhaust pipe 15.

With the fireplace of the present invention configured as described above, the exhaust gas E generated from the combustion space 7 by the suction fan 17 provided on the exhaust side is used as a rotary heat exchanger formed as an exhaust path. The air pipe 1 is formed as an air passage from outside, while being circulated in order through the combustion space opening 8 side and the exhaust pipe 15 and discharged outside.
6 and the air space 9 of the rotary heat exchanger 14 and the air space 9 sequentially flow, and the combustion air A is sucked into the combustion space 7 and the burner 12.

Further, the temperature of the exhaust gas E discharged outside is reduced by a rotary heat exchanger 14 for exchanging heat between the exhaust gas E discharged from the combustion space 7 and the combustion air A supplied to the combustion space 7. At the same time, the combustion air A can be preheated to improve the thermal efficiency. Also, exhaust pipe 1
By providing the suction fan 17 in 5, the inside of the fireplace, such as the combustion space 7, can be set in a slightly negative pressure state to prevent the exhaust gas E from leaking into the room.

Next, another embodiment of the fireplace of the present invention will be described with reference to the drawings. <1> In the above-described embodiment, the regenerative rotary heat exchanger 14 is used as the heat exchange means, but the heat exchange means for exchanging heat between the exhaust gas E and the combustion air A includes A stationary heat exchanger that performs heat exchange by heat transfer between roads, a heat pipe type heat exchanger that performs heat exchange by a heat pipe, or the like can be used.

<2> In the above embodiment, the suction fan 17 is provided on the exhaust pipe 15 side as a forced ventilation fan. However, a push fan can be separately provided in the air pipe 16. Both may be provided. In this case, there is no need to make the combustion space airtight with respect to the room, so there is no need to provide the heat-resistant glass 2 or the like. Also, in this case, the pressure in the combustion space is reduced to a negative pressure by setting the amount of air blown by the suction fan of the exhaust pipe to be slightly larger than the amount of exhaust gas that can be calculated from the amount of air blown by the push-in fan and the amount of combustion in the combustion space. The exhaust gas can be prevented from leaking into the room.

<3> In the above-described embodiment, the configuration in which the false wood 5 is provided as the effect member in the combustion space 7 is shown. However, it is also possible to perform an effect of only the flame without separately providing the false wood. In addition, it is also possible to provide a fire-resistant effect member other than the false wood, and to effect by a flame formed on the outer surface of the effect member.

<4> In the above embodiment, the combustion air A is introduced into the combustion space 7 from outside by the air pipe 16 communicating with the outside.
The air pipe may be communicated with the room, and the combustion air may be introduced from the room into the combustion space.

[0022]

According to the fireplace of the present invention described above, the thermal efficiency can be increased, so that a heating effect can be expected using the fireplace as a heating device. Further, the flame temperature in the combustion space rises due to the rise in the temperature of the combustion air, resulting in a more intense bright flame state, and the effect can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating the configuration of a fireplace according to the present invention.

FIG. 2 is a schematic configuration diagram illustrating the configuration of a conventional fireplace.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fireplace main body 2 heat-resistant glass 3 grate 4 refractory insulation material 6 partition wall 7 combustion space 8 combustion space opening 9 air space 10 air space opening 12 burner 13 fuel nozzle 14 rotary heat exchanger (heat exchange means) 15 exhaust pipe 16 air Pipe 17 Suction fan (forced ventilation fan) A Combustion air G Fuel gas E Exhaust gas

Claims (3)

[Claims] 1. A burner for burning fuel on an outer surface of an effect member provided in a combustion space facing an interior of a room, and an exhaust passage for guiding exhaust gas after combustion discharged from the combustion space to the outside. An air passage for introducing combustion air used for combustion of the fuel into the combustion space from outside, and discharging the exhaust gas from the exhaust passage to the outside, and the combustion for combustion from the outside. A fireplace comprising: a forced ventilation fan that draws air into the air passage; and a heat exchange unit that exchanges heat between the exhaust gas in the exhaust passage and the combustion air in the air passage. 2. A transparent plate member for airtightly partitioning the combustion space with respect to the room, and for making a combustion state in the combustion space visible from the room, wherein the forced ventilation fan is provided in the air passage or the air passage. The fireplace according to claim 1, wherein the fireplace is one fan provided in the exhaust path. 3. An air space provided below the combustion space with the burner portion, wherein the air passage is separated from the combustion space by a partition wall provided on a back surface side of the room in the combustion space. An air space opening provided above the air space and an air pipe communicating the outside, and the exhaust path is provided between the combustion space opening provided above the combustion space on the partition wall side and the outdoor. The heat exchange means is provided across the air space opening and the combustion space opening, and stores heat of the sensible heat of the exhaust gas flowing from the combustion space into the combustion space opening. 3. The fireplace according to claim 1, wherein the fireplace is a heat storage type heat exchange unit that stores heat in the air space and preheats the combustion air flowing into the air space from the air space opening by the stored heat.