JP3435468B2 - 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 which discharges combustion heat into a room together with warm air.

[0002]

2. Description of the Related Art Conventionally, a hot-air heater of a type that discharges combustion exhaust into a room is used by carrying the room inside and placing it on the floor surface. Hot air / exhaust air is discharged into the room from the hot air outlet by a convection blower, and it has come to be regarded as important because the temperature difference between the upper and lower sides of the room is small.

In such a warm air heater, when the room temperature rises, the combustion amount and the air flow rate of the convection blower are reduced to maintain the room temperature at the set temperature, or when the room temperature further rises, The method of stopping combustion was adopted.

[0004]

Since the airtightness of the recent building structure is high, the heating efficiency is high, and the room temperature rises relatively quickly. Therefore, a heater with a small heat generation amount is required and is downsized. However, even with such a small heater, there is a voice that it keeps a small amount of combustion even after the room temperature once rises, the temperature of the warm air sent by the convection blower is high, and it is uncomfortable when it hits the body. Is being questioned. Therefore, in order to maintain a constant temperature, the device operation is turned on with the signal from the room temperature sensor.
Although there is a control method to turn it off, the indoor exhaust type hot air heater suffers from the odor generated during ignition and extinguishing.

[0005]

In order to solve the above problems, the present invention provides a ventilation passage 3 of a convection blower 2 provided in a frame body 1.
A combustion chamber 4 is provided therein, the combustion chamber 4 is connected to a burner 6 that burns fuel by receiving the supply of combustion air from a combustion blower 5, and the indoor air sent by the convection blower 2 is In the warm air heater that changes from the heat of the burner 6 and the combustion chamber 4 to warm air and discharges it from the front opening 7 of the air passage 3 of the frame 1, the combustion chamber cover 8 is provided outside the combustion chamber 4 with a gap. The combustion chamber cover 8 is provided with a front opening 9 in front of the combustion chamber 4 on the front opening 7 side of the frame 1 and a rear opening 10 behind the combustion chamber 4 on the convection blower 2 side.
The upper edge of the front opening 9 is located higher than the upper edge of the rear opening 10 to form an air flow path from the rear opening 10 toward the front opening 9, and the convection blower 2 is provided with a manual stop means 11. The convection blower 2 is stopped while the combustion of the burner 6 is continued.

Further, in order to prevent the temperature of the combustion chamber cover 8 from rising abnormally when the convection blower 5 is stopped,
According to the present invention, in the air supply passage 12 from the combustion blower 5 to the burner 6, a second air supply passage 13 is provided to divide the air from the air supply passage 12, and the outlet of the second air supply passage 13 is provided at the combustion chamber cover 8 A part of the air of the blower 5 for combustion is guided into the combustion chamber cover 8 to lower the temperature.

Further, the uncomfortable feeling of the wind of the convection blower 5 is caused by the warm air when the room temperature rises. Therefore, the manual stop means 11 of the convection blower 2 is combined with the fuel supply means 14 of the burner 6. The interlocked and operated manual stop means 11 does not stop the convection blower 2 when the fuel supply means 14 sets a large flow rate, but stops the convection blower 2 when a small flow rate is set. It is possible to prevent an abnormal temperature rise of the frame body 1.

[0008]

The hot air heater sends gas or petroleum fuel to the burner 6, operates the combustion blower 5 to send combustion air to the burner 6, and burns the burner 6 and the combustion chamber 4.
A combustion chamber cover 8 is provided outside the combustion chamber 4, and the upper edge of the front opening 9 of the combustion chamber cover 8 is at the rear opening 10.
Since it is located higher than the upper edge of the frame 1, the hot gas obtained in the burner 6 and the combustion chamber 4 passes from the inside of the combustion chamber cover 8 through the front opening 9 where the upper edge is at a high place, and It is sent to the room through the front opening 7.

At this time, since the upper edge of the front opening 9 of the combustion chamber cover 8 is at a high place, the air in the air passage 3 creates an air flow from the rear opening 10 to the front opening 9 together with the flow of hot gas. Thus, even when the convection blower 2 is stopped by the manual stop means 11, the rear opening 10 to the front opening 9
Since the low-temperature air flow toward the air mixes with the hot gas in the combustion chamber cover 8, the hot gas temperature and the temperature of the combustion chamber cover 8 decrease.

On the other hand, when the convection blower 2 is operating, the rear opening 10 is opened on the side of the convection blower 2, so that the room air is forcibly sent from the rear opening 10 to the combustion chamber cover 8. And the hot gas can be efficiently used in the front opening 9
The air passing through the blower passage 3 is air-cooled from the outside to raise the temperature, and the warm air can reach a position far from the frame 1 of the heater.

Further, since the air supply passage 13 for diverting from the air supply passage 12 of the combustion blower 5 is provided and the outlet of the second air supply passage 13 is looked into the combustion chamber cover 8, the convection blower 2 is provided.
Even when the operation is stopped by the manual stop means 11, the combustion blower 5 can forcibly create an air flow in the combustion chamber cover 8.

Furthermore, according to the present invention, the convection blower 2 is operated by interlocking the manual stop means 11 and the fuel supply means 14 of the convection blower 2 and operating the manual stop means 11 when a large flow rate is set.
However, the convection blower 2 can be stopped only when the small flow rate is set. Therefore, the air flow formed in the combustion chamber cover 8 by the small frame 1 is weak, and even when heat is easily accumulated in the frame 1, the convection blower 2 is used when burning at a large flow rate where an abnormal state is likely to occur. You can keep your safety by driving.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described below with reference to the drawings showing an embodiment. Reference numeral 1 is a frame of a hot air heater for discharging hot air and exhaust gas emitted from a combustion chamber 4 by a convection blower 2 instead of warm air.
Reference numeral 2 denotes a convection blower provided on the back of the frame body 1 or the like, which is arranged so as to face the combustion chamber 4. Reference numeral 3 denotes a ventilation passage through which the air blown from the convection blower 2 passes, and the ventilation passage 3 includes the frame 1
The front panel 7 has a front opening 7 for forming a hot air outlet, and the combustion chamber 4 is located in the blower passage 3, and the indoor air sent by the convection blower 2 is on the front and side of the combustion chamber 4. It is formed so as to flow toward the opening 7.

Reference numeral 6 is a burner connected to the combustion chamber 4, 14 is a fuel supply means formed by an electromagnetic pump, 15 is a fuel pipe connected to the burner 6, and the fuel supply means 14 is sucked from an oil tank (not shown). Fuel is supplied to the burner 6 via the fuel pipe 15. The fuel supply means 14 when a gaseous fuel is used as the fuel may be constituted by a flowable valve or a solenoid valve.

Reference numeral 5 is a combustion blower, and 12 is a combustion blower 5.
From the burner 6 to the burner 6. The blower 5 for combustion supplies the combustion air to the burner 6 through the supply passage 12.
Supply to.

The burner 6 starts ignition combustion by an ignition device (not shown) and completes combustion in the combustion chamber 4, and the heater of the embodiment discharges high-temperature hot air and exhaust gas to the blower passage 3. , The indoor air sent by the convection blower 2 is burner 6
Also, the temperature of the combustion chamber 4 becomes high due to the heat of the combustion chamber 4, and it is further mixed with the combustion exhaust gas to become warm air, which is discharged from the front opening 7 to the outside of the frame 1.

Reference numeral 8 denotes a combustion chamber cover located outside the combustion chamber 4 in the air passage 3 with a gap, and 9 is provided in front of the combustion chamber on the combustion chamber cover 8 on the front opening 7 side of the frame 1. The front opening 10 is a rear opening provided in the combustion chamber cover 8 on the side of the convection blower 2 behind the combustion chamber 4, and the upper edge of the front opening 9 of the combustion chamber cover 8 is above the rear rear opening 10. It is located higher than the edge.

If desired, the combustion chamber cover 8 may be attached with a plurality of gaps in between, and in this case, the upper edges of the front opening 9a and the rear opening 10a of the outer combustion chamber cover 8a are located inside. It is higher than the front opening 9 and the rear opening 10 of the combustion chamber cover 8. Even if hot air and exhaust gas rising from the combustion chamber 4 flow into the combustion chamber cover 8, the upper edge of the front opening 9 is located above the rear opening 10, so that hot air and exhaust gas flow from the rear opening 10. The air in the air passage 3 is sucked into the frame body 1 smoothly and surely and smoothly.

When the convection blower 2 is operated, the indoor air is forced to flow toward the front opening 7, and a part of the air flows from the rear opening 10 to the front opening 9. Is to reach the front of the frame 1.

Reference numeral 11 denotes a manual stop means of the convection blower 2. By operating the manual stop means 11, the convection blower 2 can be turned on and off. The convection blower 2 may be stopped regardless of the amount of heat generated if the frame 1 of the heater has a shape with a margin for the maximum amount of heat generated, but in the case of a small frame 1, heat is trapped inside. The temperature may become abnormally high. In the present invention, the manual stop means 11 and the fuel supply means 14
When a large flow rate is set in which the fuel supply means 14 has an abnormally high temperature, the convection blower 2 continues to rotate even if the convection blower 2 is stopped by operating the operating portion of the manual stop means 11. Therefore, the frame 1 of the heater does not become an abnormally high temperature and the convection blower 2 can be stopped when it is desired to stop the convection blower 2 like when the room temperature is stabilized at the set temperature.

Reference numeral 13 denotes a second air supply passage which is a branch of the air supply passage 12 extending from the combustion blower 5 to the burner 6, and the second air supply passage 13 has an outlet in the combustion chamber cover 8 for combustion. A part of the air is blown. When there are a plurality of combustion chamber covers 8, it is better to let the second air supply passage 13 look into the gap between the outer combustion chamber cover 8a and the inner combustion chamber cover 8 when the outer combustion chamber cover 8a is exposed. It can be expected that the temperature will drop.
Further, in the case of this structure, the convection blower 2 can be stopped even when the heating value of the heater is large.

Reference numeral 16 denotes a heat dissipation plate formed of a transparent body / punching plate provided in a front opening 7 facing the front surface of the combustion chamber cover 8, and the combustion chamber 4 exposed from the front surface of the combustion chamber cover 8 and the front opening 9. When the far-infrared radiator or far-infrared paint 17 is applied to the wall, far-infrared rays are radiated from the front opening 7 to improve radiation efficiency. Further, when the heat dissipation plate 16 is formed of a punching plate, if a heat treatment is applied to the surface side of the heat dissipation plate 16, it is possible to eliminate the risk of burns even if the heat dissipation plate 16 is touched by a hand.

[0023]

[Effects] The present invention has the above-described configuration and operation. Since the operator can operate the manual stop means 11 to continue the combustion of the heater while the convection blower 2 is stopped, The hot gas generated in the burner 6 and the combustion chamber 4 is the frame 1
The natural convection ascends to the upper part of the room without blowing out to the front, and the warm hot air does not hit the body and cause discomfort.

Further, the warm air heater is for efficiently heating the room air by forcibly convection the indoor air with the convection blower 2. However, the discomfort that the hot air hits the body is eliminated rather than the efficiency of the indoor temperature rise is increased. When expected, the second air supply passage 12 is provided in the combustion chamber cover 8 so that the convection blower 2 can be stopped at any time according to the preference of the operator.

On the other hand, the discomfort caused by the warm air of many people is caused by the fact that only the warm air hits the body at a high temperature even though the room temperature is the desired temperature, and in the present invention, the convection blower 2 is used. When the manual stop means 11 is operated, the manual stop means 11 that works in conjunction with the combustion supply means 14 stops the convection blower 2 and creates a comfortable state when the room temperature approaches the set temperature. At this time, the hot gas generated in the burner 6 and the combustion chamber 4 does not reach the operator and flows toward the ceiling by natural convection. The temperature did not rise and the comfortable temperature could be maintained.

[Brief description of drawings]

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

[Explanation of symbols]

1 frame 2 Convection blower 3 air passage 4 Combustion chamber 5 Combustion blower 6 burners 7 Front opening of the frame 8 Combustion chamber cover 9 Front opening of combustion chamber cover 10 Combustion chamber cover rear opening 11 Automatic stop means 12 Air supply passage 13 Second air supply passage 14 Fuel supply means

─────────────────────────────────────────────────── ─── Continuation of front page (56) Bibliography Sho 56-58045 (JP, U) Rikai Flat 3-128245 (JP, U) Rikai 63-134251 (JP, U) Rikai 59- 92357 (JP, U) Actual Kaihei 4-8042 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24H 3/04

Claims (3)

(57) [Claims] 1. A combustion chamber 4 is provided in a blower passage 3 of a convection blower 2 provided in a frame 1, and the combustion chamber 4 is a combustion blower 5.
The indoor air that is connected to the burner 6 that receives the supply of combustion air from the burner 6 and burns the fuel and that is sent by the convection blower 2 is replaced by warm air by the heat of the burner 6 and the combustion chamber 4, In the warm air heater that discharges from the front opening 7 of the blower passage 3 of No. 1, a combustion chamber cover 8 is provided outside the combustion chamber 4 with a gap therebetween.
Front opening 9 on the front opening 7 side of the frame 1 in front of
A rear opening 10 is provided behind the combustion chamber 4 on the side of the convection blower 2, and the upper edge of the front opening 9 is positioned higher than the upper edge of the rear opening 10 so that the air flows from the rear opening 10 toward the front opening 9. The convection blower 2 forms the flow path, and the convection blower 2 is manually stopped by the stop means 1.
The hot air heater is provided with 1 and stops the convection blower 2 while continuing the combustion of the burner 6. 2. A second air supply passage 13 that branches off from the air supply passage 12 is provided in the air supply passage 12 from the combustion blower 5 to the burner 6, and the outlet of the second air supply passage 13 is provided with a combustion chamber cover. The hot air heater according to claim 1, wherein the hot air heater is directed into the combustion chamber cover 8 and a part of the air of the combustion blower 5 is guided into the combustion chamber cover 8. 3. The manual stop means 11 of the convection blower 2 is interlocked with the fuel supply means 14 of the burner 6, and the operated manual stop means 11 stops the convection blower 2 when the fuel supply means 14 sets a large flow rate. The hot air heater according to claim 1, wherein the convection blower 2 is stopped when the small flow rate is set.