JP3031403B2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater capable of discharging combustion heat into a room together with warm air and stopping the convection blower for combustion.

[0002]

2. Description of the Related Art Conventionally, a hot air heater of a type that discharges combustion exhaust gas into a room is carried around the room and used on a floor surface. A combustion chamber is provided in a frame, and a burner in the combustion chamber is used. Combustion, hot air and exhaust air from the combustion chamber are sent to the ventilation passage by a convection blower, and hot air is released from the hot air outlet into the room. It has become

[0003] Such a warm air heater reduces the fuel flow rate and the amount of air blown from the combustion blower when the indoor temperature rises, to maintain the indoor temperature at a constant temperature, or when the temperature further rises, the combustion is stopped. The method of stopping was adopted.

[0004]

A recent building structure has a high air-tightness and therefore has a high heating efficiency, and the room temperature rises relatively quickly. Therefore, unless a heating device suitable for the size of the room is used, The rise in room temperature may continue. Even with a heater in such a room, there are voices saying that it is uncomfortable if warm air hits the body once the room temperature has risen, and this has been regarded as a problem.

If the convection blower is stopped while the burner continues to burn to eliminate this discomfort, heat is trapped in the frame and the temperature of various parts inside the frame rises abnormally, which is dangerous. However, if the surface temperature of the frame body is too high, there is a risk of burns if carelessly touched.

[0006]

According to the present invention, a burner 2 is provided in a frame 1 and a combustion chamber 3 is provided above the burner 2 in order to solve the above-mentioned problems. A combustion blower that is mounted in the provided ventilation passage 4, has a convection blower 5 on the inlet side of the ventilation passage 4, and a blower outlet 6 on the outlet side, and sends combustion air to the burner 2 near the burner 2. 7 and a pump 8 for feeding fuel to the burner 2, a hot air heater for diverting low-temperature air sent from the combustion fan 7 to supply the combustion gas when the convection fan 5 is stopped, An air chamber 9 is provided close to the front surface of the frame 1 above the outlet 6,
A slit 10 communicating with the air chamber 9 is provided, a pipe 11 for supplying low-temperature air diverted from the combustion blower 7 is connected to the air chamber 9, and a part of the air of the combustion blower 7 is blown from the slit 10. It is something to put out.

Further, the upper plate 3a of the combustion chamber 3 makes the outlet 6 side of the frame body 1 incline high, and the upper plate 4a of the ventilation passage 4 also extends along the upper plate 3a of the combustion chamber 3. The heat shield plate 12 is mounted in the gap between the upper plates 3a and 4a, and the end of the heat shield plate 12 is positioned near the upper edge of the air outlet 6. The heat shielded air in the gap with the upper plate 4 a flows out to the upper edge of the outlet 6.

[0008]

The hot air heater sends oil fuel to the burner 2 in the frame 1 and operates a combustion blower 7 to send combustion air to the burner 2 to perform combustion in the burner 2 and the combustion chamber 3 to perform convection. The air blower 5 mixes the room air with the combustion gas and blows out from the outlet 6.

It is uncomfortable if the warm air of the convection blower 5 hits the body once the temperature has risen. Therefore, there is a demand to stop the convection blower 5, and if the convection blower 5 is stopped, the combustion gas is blown. A problem occurs in which the inside of the passage 4 is filled and the device is brought to an abnormally high temperature. Therefore, there is a concept of supplying low-temperature air diverted from the combustion blower 7 to the combustion gas in order to discharge the combustion gas from the inside of the ventilation passage 4.

At this time, in order to discharge the combustion gas with the low-temperature air, a large amount of air is required according to experiments. Therefore, if the size of the combustion fan 7 is large, the amount of the hot air is increased, and the convection fan is used. There is no point in stopping 5. According to the present invention, an air chamber 9 is provided near the upper part of the air outlet 6 on the front surface of the frame 1 by using a conventional combustion blower 7 as it is, and a pipe 11 for sending low-temperature air diverted from the combustion blower 7 is provided. It is connected to an air chamber 9 having a slit 10. For this reason, the low-temperature air flows through the pipe 11 and passes through the air chamber 9.
Is blown out from the slit 10 communicating with the air chamber 9 while forming a low-temperature thin air layer on the front surface of the front plate of the frame 1 above the slit 10 to block high-temperature combustion gas, The temperature of the upper part of the front plate is prevented from rising.

On the other hand, since the abnormally high temperature due to the combustion gas is concentrated on the upper portion of the front plate of the frame 1, the upper plate 3a of the combustion chamber 3 is inclined in the frame 1 so that the side of the blowout port 6 is inclined at a high level. The gas can be discharged immediately. Further, a heat shield plate 12 is mounted in a gap between the upper plate 3a of the combustion chamber 3 and the upper plate 4a of the ventilation passage 4, and the tip of the heat shield plate 12 is located near the upper edge of the outlet 6. , Air is natural convection and heat shield plate 12
Flows out to the vicinity of the upper edge of the outlet 6 along the gap between the upper plate 4a. This air has a low temperature due to the heat shield plate 12 and flows between the high-temperature combustion gas and a small amount of low-temperature air blown out from the slit 10, so that the temperature of the low-temperature air blown out from the slit 10 rises. And the temperature rise of the front plate of the frame 1 can be kept low.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a structure of a hot-air heater, 2 is a burner provided in a frame 1, 3 is a combustion chamber provided above a burner 2, Reference numeral 8 denotes a pump provided near the burner 2, and reference numeral 13 denotes a fuel pipe connected to the burner 2. The pump 8 sucks fuel from an oil tank (not shown) and supplies the fuel to the burner 2 via the fuel pipe 13. Reference numeral 7 denotes a combustion blower provided near the burner 2,
The combustion blower 7 sends combustion air to the burner 2 and performs combustion in the burner 2 and the combustion chamber 3.

Reference numeral 4 denotes a ventilation passage through which the combustion gas discharged from the combustion chamber 3 is sent, 5 denotes a convection blower provided on the inlet side of the ventilation passage 4, and 6 denotes an air outlet provided on the outlet side of the ventilation passage 4. The convection blower 5 sends room air from the back of the frame 1 into the air passage 4, mixes it with the combustion gas discharged from the combustion chamber 3, and blows out the room from the outlet 6 on the front of the frame 1 to warm the room. .

9 is an air chamber provided above the front plate of the frame 1;
Reference numeral 10 denotes a slit communicating with the air chamber 9.
Is provided in the upper part of the outlet 6, and the slit 10 has a narrow gap in the entire upper part of the outlet 6. 11
Is a pipe for sending low-temperature air diverted from the combustion fan 7 to the air chamber 9. Air diverted from the combustion fan 7 during operation of the combustion fan 7 flows into the pipe 11 to flow into the air chamber 9.
The low temperature air is uniformly blown into the room using the entire slit 10 while applying pressure to the air chamber 9. Also, when the convection blower 5 is stopped, the slit 10
Blows out low-temperature air to form a layer of air on the front surface of the front plate of the frame 1 to block high-temperature combustion gas and avoid an increase in the temperature of the upper portion of the front plate of the frame 1.

Reference numeral 3a denotes an upper plate of the combustion chamber 3 provided in the ventilation passage 4. Since the upper plate 3a has the outlet 6 side inclined higher, the combustion gas discharged from the combustion chamber 3 has an inclined upper plate. 3a
Flows forward along, and is smoothly discharged out of the frame 1,
The combustion gas is less likely to stay in the ventilation passage 4.

Reference numeral 14 denotes a front plate of the combustion chamber 3 on the side of the outlet 6;
Is a combustion gas retention chamber formed by extending the front edge 3b of the upper plate 3a of the combustion chamber 3 downward, and 14a is an upper edge of the front plate 14 of the combustion chamber 4 viewed from the retention chamber 15. A downward exhaust port 16 between the plate 14 and the front edge 3b of the upper plate 3a of the combustion chamber 3;
Is formed. For this reason, the combustion gas flowing along the upper plate 3a of the combustion chamber 3 changes its direction downward along the front edge 3b, flows to the outlet 6, and eventually changes to an upward flow, so that the combustion gas reaches far, The temperature rise in the upper part of the front plate of the body 1 is reduced.

Reference numeral 4a denotes an upper plate of the air passage 4 having a high inclination on the side of the outlet 6 along the upper plate 3a of the combustion chamber 3, and 12 denotes an upper plate 3a of the combustion chamber 3 and an upper plate 4a of the air passage 4. The tip of the heat shield plate 12 is located near the upper edge of the outlet 6, and when the convection blower 5 is operated, the indoor air is blown along the heat shield plate 12. The low-temperature air flows through the passage 4 and blows vigorously into the room to avoid an increase in the temperature of the upper part of the front plate of the frame 1. Further, even if the convection blower 5 is stopped, the temperature rise of the air in the gap between the upper plate 4a and the upper plate 4a is small due to the heat shield plate 12, and the air flows along the heat shield plate 12 by natural convection, and the combustion gas and Since the air is blown out between the air blown out from the slit 10 and the upper part of the front plate of the frame 1, the temperature rise is prevented.

6a is a louver provided at the lower part of the outlet 6,
6b is a perforated guard provided above the louver 6a, 17 is a radiator plate provided opposite the perforated guard 6b in the frame 1, and the radiator plate 17 receives heat rising from the combustion chamber 3 and has a high temperature. Then, the heat rays radiated from the heat radiating plate 17 reach the front via the porous guard 6b, and the user in front can take heat with the heat rays. When a far-infrared radiator or far-infrared paint is applied to the front edge 3b and the front plate 14 of the upper plate 3a, radiation efficiency is improved. Also, the louver 6a and the perforated guard 6b
If heat-insulating fiber is planted on the front surface, there is less risk of burns even if touched.

[0019]

According to the present invention, the structure and operation as described above are shown, and the air diverted from the combustion blower 7 is supplied to the pipe 11.
By sending the air to the air chamber 9 provided with the slit 10 from above, the amount of air blown out from the slit 10 can suppress at least the temperature rise of the upper part of the front plate of the frame 1, and the conventional blower 7 is used as it is. Now available.

Further, the upper plate 3a of the combustion chamber 3 and the upper plate 4a of the ventilation passage 4 are tilted so that the side of the outlet 6 is high, so that the upper plates 3a
Since the heat shield plate 12 whose tip is located near the upper edge of the outlet 6 is attached to the gap a, even if the convection blower 5 is stopped,
The air in the gap between the heat shield plate 12 and the upper plate 4a flows along the heat shield plate 12 by natural convection, and the combustion gas and the slit 10
Since low-temperature air is blown out from the air blown out from the slit, even if the air blown out from the slit 10 is a small amount, the temperature of the upper part of the front plate of the frame 1 is prevented from rising, and the hand touches the frame 1 It is safe without burns.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a warm air heater according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame body 2 Burner 3 Combustion chamber 3a Upper plate 4 Ventilation passage 4a Upper plate 5 Convection blower 6 Outlet 7 Combustion blower 8 Pump 9 Air chamber 10 Slit 11 Pipe 12 Heat shield plate

Claims (2)

(57) [Claims] A burner (2) is provided in a frame (1), and a combustion chamber (3) is provided above the burner (2). The combustion chamber (3) is mounted in a ventilation passage (4) provided in the frame (1). A convection blower 5 on the inlet side, and a blower outlet 6 on the outlet side, and a combustion blower 7 for sending combustion air to the burner 2 near the burner 2;
A pump 8 for feeding fuel to the burner 2; and a hot air heater for diverting low-temperature air sent from the combustion fan 7 for supplying the combustion gas when the convection fan 5 is stopped. An air chamber 9 is provided close to the front surface of the upper frame 1, a slit 10 communicating with the air chamber 9 is provided, and a pipe 11 for supplying low-temperature air diverted from the combustion blower 7 and the air chamber 9 are formed. A hot air heater, which is connected and blows a part of air of a combustion blower 7 through a slit 10. 2. An upper plate 3a of the combustion chamber 3 is provided with an air outlet 6 of the frame 1.
And the upper plate 4a of the ventilation passage 4 is also inclined higher along the upper plate 3a of the combustion chamber 3 and the heat shield plate is provided in the gap between the upper plates 3a. 2. The hot air heater according to claim 1, wherein the heat shield plate is mounted to allow the tip of the heat shield plate to flow out to the upper edge of the outlet.