JP2003074978A - Open combustion type warm air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that since a supply air in a mixture space D in a wind tunnel is not sufficiently mixed with a combustion gas, a warm air temperature becomes uneven, a temperature unevenness is large and hence a comfortableness of heating is impaired and a high-temperature air is locally discharged. SOLUTION: An open combustion type warm air heater comprises a fan 12 for a convection disposed in an upper section in a body case 1, the wind channel 5 disposed in a lower section of the fan 12, a burner port of a combustion unit 10 for generating a combustion gas B in the tunnel 5 and combustion cylinder 17 each for covering the burner port, and the mixing spaces D formed at both right and left sides of the cylinder 17 to mix the gas B from the unit 10 with the supply air from the fan 12. The warm air heater further comprises a duct 21 for introducing the gas B discharged from a combustion gas discharge port 17a of the cylinder 17 to the vicinity of a center of the spaces D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open-combustion type hot air heater which is designed to make the temperature of hot air blown from a hot air outlet uniform and reduce the peak temperature.

[0002]

2. Description of the Related Art FIG. 6 is a front sectional view of a conventional open-combustion hot-air heater in which a convection fan is arranged in an upper part of a main body case, and a wind tunnel is arranged in a lower part of the convection fan. FIG. 7 is a side sectional view thereof.

The conventional open-combustion type warm air heater shown in FIGS. 6 and 7 is provided with a convection fan 12 arranged in an upper part of the main body case 1, and a lower part of the convection fan 12. There is a wind tunnel 5 that guides the blown air A from the convection fan 12 to the hot air outlet 6, and in this wind tunnel 5, a combustor 10 for generating a combustion gas B and a combustor 10 that covers the combustor 10 and exhausts the combustion gas are formed. A combustion cylinder 17 having an outlet 17a at the top is arranged. Further, the combustion gas from the combustor 10 (dotted line arrow B in the figure) and the air blown from the convection fan 12 (solid line arrow A in the figure) are mixed on both left and right sides of the combustion cylinder 17. A mixing space D is formed.

In the conventional open-combustion type hot air heater configured as described above, the combustion flame C generated by the combustor 10 generates the combustion gas B in the combustion cylinder 17. This combustion gas B is discharged into the mixing space D in the wind tunnel 5 from the combustion gas discharge port 17a formed in the upper part of the combustion cylinder 17 by the internal pressure in the combustion cylinder 17.

On the other hand, the convection fan 12 sucks indoor air from the outside air inlet 3 of the intake filter 4 mounted on the side surface of the main body case 1 and sends the blown air A into the mixing space D in the wind tunnel 5.

The blown air A sent by the convection fan 12 is mixed with the combustion gas B discharged from the combustion gas discharge port 17a of the combustion cylinder 17 into the mixing space D in the mixing space D to generate hot air (see FIG. The medium-thick line arrow E) is formed, and the air is discharged into the room from the warm air outlet 6 arranged on the front surface of the main body case 1.

[0007]

In the conventional open-combustion type warm air heater, the exhaust gas is discharged from the combustion gas discharge port 17a in the upper part of the combustion cylinder 17 in the mixing space D provided on both left and right sides of the combustion cylinder 17. Combustion gas B is generated by convection fan 12
Is mixed in the mixing space D with the blown air A blown by. However, since the distribution of the flow of the blast air A and the distribution of the combustion gas B in the wind tunnel 5 are not uniform, the blast air A and the combustion gas B are not sufficiently mixed in the mixing space D. For this reason, the temperature of the hot air at the hot air outlet 6 becomes non-uniform, the temperature unevenness is large, and the hot air of high temperature is discharged at a certain portion,
In some parts, low temperature warm air was discharged. In particular, when hot air with a high temperature is discharged, the higher the hot air temperature is, the more its buoyancy increases, so the warm air immediately rises to the upper space of the room during heating, and the comfort of heating is impaired. There is a problem that the hot air outlet 6 needs to have a heat resistance measure because the temperature of the hot air blows out locally.

To solve the above problem, the combustion cylinder 17
It is an effective means to make the mixing space D large not only on the left and right side portions but also on the front and rear side portions, but there is a problem that the main body case 1 cannot be made too large due to a problem such as an installation space.

The present invention solves the above problems, and an object of the present invention is to make the temperature of the hot air uniform and the peak temperature lower without enlarging the mixing space. .

[0010]

In order to achieve the above object, the open combustion type hot air heater of the present invention has a convection fan arranged in an upper part of a main body case, and a lower part of the convection fan. A wind tunnel is arranged in the wind tunnel, a combustor for generating combustion gas in the wind tunnel, and a combustion tube for covering the flame mouth portion of the combustor are arranged, and the combustion gas from the combustor and the In an open combustion type hot air heater, which forms a mixing space for mixing with air blown from a convection fan,
A duct that guides the combustion gas discharged from the combustion gas discharge port of the combustion cylinder to the vicinity of the center of the mixing space is provided.

Further, the duct is integrally provided with an upper surface cover for closing the upper surface of the combustion cylinder.

Further, the combustion gas discharge port of the duct is provided on a surface which does not directly receive the flow of air blown from the convection fan.

Further, the combustion gas discharge port of the duct is provided long in the longitudinal direction of the duct.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a front sectional view of an open combustion type hot air heater showing Embodiment 1 of the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a sectional view taken along line XX of FIG. is there.

1 to 3, 1 is a main body case, 3
Is an outside air inlet provided on both sides of the main body case 1,
Reference numeral 5 is a wind tunnel provided in the main body case 1, 6 is a warm air outlet provided in the front surface of the main body case 1, 10 is a combustor for burning liquid fuel, and its flame mouth portion 5a is located in the wind tunnel 5. Let me arrange. Reference numeral 11 is a cartridge tank containing the liquid fuel, 12 is a convection fan composed of a sirocco fan provided in the upper part of the main body case 1, and the convection fan 12 includes a drive motor 12a, a fan 12b, and a fan casing 12c. The fan casing 12c has a suction port 12d communicating with the outside air suction port 3 and a discharge port 12e communicating with the wind tunnel 5.

Reference numeral 15 denotes a combustion fan, which is composed of a fan cover 15a, a fan 15b, and a driving motor 15c, and is used for combustion from a combustion air intake (not shown) provided at a lower portion of a side surface of the main body case 1. It is configured to take in air. Reference numeral 17 is a combustion cylinder that covers the flame opening 5a of the combustor 10 so as to surround it, and 19 is a combustor cover that covers the lower periphery of the combustor 10, and is provided on the bottom surface of the combustor cover 19. Air required for combustion is supplied from the combustion fan 15 through the combustion air intake hole 19a. 9
Is a partition wall that divides the space inside the body case 1 into two parts,
The convection fan 12, the combustor 10, the combustion fan 15
Are vertically arranged in the front space inside the main body case 1 partitioned by the partition wall 9, and the cartridge tank 11 is arranged in the rear space. Reference numeral 20 is a fuel tray that receives the supply of fuel from the cartridge tank 11.

Reference numeral 16 denotes a partition plate which partitions the lower part of the combustor 10 from the wind tunnel 5. An upper surface cover 18 is provided on the upper surface of the combustion cylinder 17 so that the blown air A of the convection fan 12 does not directly contact the combustor 10. Reference numeral 21 denotes a duct provided so as to be connected to the combustion gas discharge port 17a provided on the upper side surface of the combustion cylinder 17, and is integrally formed with the upper surface cover. A slit-shaped combustion gas discharge port 21a is provided long in the longitudinal direction on the lower surface to which the blown air A does not directly contact. D is a mixing space formed on both right and left sides of the combustion cylinder 17 when viewed from the front side of the main body case 1, and is formed in a relatively large space, and the combustion gas B from the combustor 10 and the air blown from the convection fan 12 are blown. It is a space for mixing with air A.

Next, the operation of the open combustion type hot air heater having the above structure will be described. When a vaporizer (not shown) in the combustor 10 is heated to the vaporization temperature of the liquid fuel,
The fuel in the fuel tray 20 is supplied to the combustor 10 by an electromagnetic pump or the like (not shown). In addition, the combustion air required for combustion is generated by the operation of the combustion fan 15 and the combustor cover 1
9 is sent to the combustor 10 through the combustion air intake hole 19a for combustion. Combustion gas B generated by combustion in the combustor 10
Rises in the combustion cylinder 17 and the combustion gas discharge port 1
7a into the duct 21, and is discharged into the mixing space D from the combustion gas discharge port 21a provided in the duct 21. On the other hand, when the convection fan 12 is operated, indoor air is taken into the main body case 1 from the outside air intake ports 3 provided on both side surfaces of the main body case 1, and an air flow shown by a solid arrow A in the figure is obtained. , Enters into the fan casing 12c of the convection fan 12 through its suction port 12d, and the discharge port 1
After being blown out from 2e, the top cover 18 of the combustion cylinder 17
And the combustion gas B discharged from the combustion gas discharge port 21a of the duct 21 and the mixing space D.
The mixed air becomes hot air E, which is discharged into the room from the hot air outlet 6 on the front surface of the main body case 1 to heat the room.

Here, in the open combustion type hot air heater according to the first embodiment, as is clear from FIGS. 1 and 3, the combustion gas B generated in the combustor 10 is the combustion gas in the combustion cylinder 17. The exhaust gas 17a is not directly discharged into the mixing space D but is guided through the duct 21 to the vicinity of the center of the mixing space D and is dispersed and discharged. Therefore, the combustion gas B is widely dispersed in the mixing space D as well. Can be discharged. Therefore, the blast air A sent to the mixing space D and the combustion gas B are well mixed, and the warm air E with less temperature unevenness is obtained, and the warm air E discharged from the warm air outlet 6 into the room is uniform. Therefore, the peak temperature of warm air can be lowered as a result. Further, the combustion gas discharge port 21a of the duct 21 is formed as a slit-shaped opening and is elongated in the longitudinal direction of the duct 21, so that the dispersion of the combustion gas B in the mixing space D can be further promoted.

Further, the combustion gas exhaust port 21a of the duct 21
Is provided on the lower surface that does not directly receive the flow of the blown air A from the convection fan 12, so that it does not affect the internal pressure of the combustion cylinder 17, and thus stable combustion is possible. The shapes and sizes of the duct 21 and the combustion gas discharge port 21a are
For example, the combustion gas B may be appropriately changed as necessary so that a large amount of the combustion gas B can be discharged to a place where the flow velocity of the blown air A is high or a place where the flow rate is large.

Embodiment 2. 4 is a sectional view of a portion corresponding to FIG. 3 showing the second embodiment of the present invention. In the second embodiment, the combustion gas discharge port 21a of the duct 21 is replaced with a slit-shaped opening and a plurality of holes are provided in the longitudinal direction. With the configuration of the second embodiment, as in the first embodiment, the dispersion of the combustion gas B can be promoted,
The same effect as that of the first embodiment can be obtained.

Embodiment 3. FIG. 5 is a perspective view of a combustion cylinder and a duct portion of an open combustion type warm air heater showing a third embodiment of the present invention. In the third embodiment, the duct 21 is formed as a separate component from the upper surface cover 18 of the combustion cylinder 17, and two ducts 21 are provided on each of the left and right sides to provide a total of four ducts 21. According to the configuration of the third embodiment, as compared with the configurations of the first and second embodiments, the combustion gas B can be further dispersed and discharged into the mixing space D, so that it is blown out from the warm air outlet 6. It is possible to further homogenize the warm air E and reduce the peak temperature.

[0023]

As described above, in the open combustion type hot air heater according to the present invention, the convection fan is arranged in the upper part of the main body case, and the wind tunnel is arranged in the lower part of the convection fan. In the wind tunnel, a flame port of a combustor for generating combustion gas and a combustion tube covering the flame port of the combustor are arranged, and the combustion gas from the combustor and the convection are provided on both left and right sides of the combustion tube. In an open-combustion hot air heater that forms a mixing space for mixing with air blown from a fan, guides combustion gas discharged from a combustion gas discharge port of the combustion cylinder to the vicinity of the center of the mixing space. Since a duct is provided, the combustion gas and the convection fan from the convection fan in the mixing space can be discharged by discharging a large amount of the combustion gas in a place where the flow velocity of the blown air is high or in a place where the flow rate is large. With blast air enough As a result, the temperature of the hot air blown out from the hot air outlet can be made uniform, temperature unevenness can be reduced, and the peak temperature of the hot air can be lowered, making the warm air heater more comfortable. Can be provided.

Further, since the duct is integrally provided with the upper surface cover for closing the upper surface of the combustion cylinder, the duct can be easily attached to the combustion cylinder, the number of parts can be reduced, and the cost can be reduced.

Further, since the combustion gas discharge port of the duct is provided on the surface which is not directly affected by the flow of the blown air from the convection fan, the internal pressure of the combustion cylinder is not affected and stable combustion is possible. Become.

Further, since the combustion gas discharge port of the duct is provided long in the longitudinal direction of the duct, it is possible to further promote the dispersion of the combustion gas.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view of an open combustion type warm air heater showing a first embodiment of the present invention.

FIG. 2 is a side cross-sectional view of the open combustion type hot air heater according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a sectional view of a portion corresponding to FIG. 3 showing a second embodiment of the present invention.

[Fig. 5] Fig. 5 is a perspective view of a combustion cylinder and a duct portion of the open-combustion hot air heater according to the third embodiment of the present invention.

FIG. 6 is a front sectional view of a conventional open-combustion hot air heater.

FIG. 7 is a side sectional view of a conventional open-combustion hot air heater.

[Explanation of symbols]

1 main body case, 3 outside air inlet, 5 wind tunnel, 6 warm air outlet, 10 combustor, 12 convection fan, 17 combustion cylinder, 17a combustion gas outlet, 18 top cover, 2
1 duct, 21a combustion gas exhaust port.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuo Murata             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. F-term (reference) 3L028 AA02 AB05 AC01

Claims (4)

[Claims] 1. A convection fan is arranged in an upper part of a main body case, a wind tunnel is arranged in a lower part of the convection fan, and a flame port of a combustor for generating combustion gas in the wind tunnel and the combustion. Combustion cylinders that cover the flame openings of the combustor are arranged, and mixing spaces for mixing the combustion gas from the combustor with the air blown from the convection fan are formed on the left and right sides of the combustion cylinder. The open-combustion hot air heater is provided with a duct that guides the combustion gas discharged from the combustion gas discharge port of the combustion cylinder to the vicinity of the center of the mixing space. 2. The open-combustion hot air heater according to claim 1, wherein the duct is provided integrally with an upper surface cover that closes an upper surface of the combustion cylinder. 3. The open-combustion hot-air heater according to claim 1, wherein the combustion gas exhaust port of the duct is provided on a surface that does not directly receive the flow of air blown from the convection fan. 4. The combustion gas discharge port of the duct is provided long in the longitudinal direction of the duct.
The open combustion type hot air heater described.