JPH0623619B2 - Hot air heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hot air heater.

2. Description of the Related Art As shown in FIG. 3, a conventional warm air heater has a warm air outlet 14
The burner 16 is provided in the main body 15 having
A combustion cylinder 17 is provided so as to surround 6 and a warm air supply fan 18 is attached to the back surface of the main body 15 to mix the wind from the fan 18 with the combustion gas from the combustion cylinder 17 to discharge the warm air. It is designed to blow out from 14. In order to improve the combustion characteristics of the burner 16, a large number of air supply through holes 19 are formed in the lower part of the combustion cylinder 16, and a duct 21 is provided on the outer periphery of the lower part of the combustion cylinder so as to surround the through holes 19. A part of the wind from the fan 18 is taken in through the opening 22 of the fan 18, and the amount of air blown by the fan 18 is switched to high, medium, and low together with the combustion amount of the burner 16, and the air is blown from the through hole 19 through the duct 21. The amount of secondary air taken in was variable.

Problems to be Solved by the Invention However, in the above configuration, the amount of air taken in from the through holes 19 at the time of weak combustion becomes large even if the amount of air blown by the fan 18 is weak, and the amount of NO2 generated is small. There was an increasing problem. Further, since the amount of air blown by the fan 18 is weak, the force of the warm air blown out from the warm air outlet 14 is weak, so that the warm air rises near the warm air outlet and the warm air reach distance is short. .

The present invention solves such problems all at once, and has as its object the reduction of NO2 and the improvement of the warm air reach during weak combustion.

Means for Solving the Problems In order to achieve the above object, the present invention provides a cool air outlet on a hot air outlet, and provides a cool air wind tunnel for directly guiding the air from the fan to the cold air outlet and from the fan. The hot-air wind tunnel, the cold-air wind tunnel, and the secondary-air intake duct are provided with an air amount adjusting plate that changes the ratio of the amount of air blown to the hot-air wind tunnel, the cold-air wind tunnel, and the duct inlet. The air amount adjusting plate is provided in the section, and is operated in conjunction with switching of the burner combustion amount.

Operation According to the present invention, when the burner burns strongly, the air amount adjusting plate is adjusted so that the inlet of the cold air wind tunnel is closed and the inlet of the hot air wind tunnel and the duct are fully opened, and the burner is switched to the weak combustion. The air amount adjusting plate moves in conjunction with each other, the inlet portion of the cold air wind tunnel opens, and the area of the inlet portion of the hot air wind tunnel and the duct decreases. Therefore, the secondary air supplied to the burner is
The generation of NO2 is reduced by the reduction of the area of the duct inlet, and the air from the fan is supplied to the wind tunnel for cold air, and the air emitted from the cold air outlet is emitted from the hot air outlet at the bottom. And increase the warm air reach.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
In FIG. 2 and FIG. 2, a warm air outlet 2 is provided on the front surface of the main body 1, and a cold air outlet 3 is provided on the warm air outlet 2. Reference numeral 4 denotes a fan provided on the back surface of the main body 1 for blowing air. Reference numeral 5 is a burner provided inside the main body 1, 6 is a combustion cylinder provided so as to surround the burner 5, 7 is a through hole provided all around the lower portion of the combustion cylinder 6, and 8 is a part of the air blown by the fan 4. Through hole 7
It is a duct provided to guide to. Reference numeral 9 is a wind tunnel for warm air that mixes the air blown from the fan 4 and combustion gas and guides it to the hot air outlet 2, and 10 is a wind tunnel for cold air that directly guides only the wind from the fan 4 to the cold air outlet 3. 11a is an air amount adjusting board,
The wind blown from the fan 4 is a wind tunnel 9 for warm air, a wind tunnel 10 for cold air,
An inlet portion for leading to the duct 8 is formed. 11b is an air amount adjusting plate that changes the opening area of each inlet,
Adjust the amount of air flowing to each. 12 is an air amount adjusting plate 11
Plunger for moving b up and down.
Reference numeral 12 operates in conjunction with the combustion amount controller 13 switching the combustion amount of the burner 5 and the air blowing amount of the fan 4.

In the above configuration, during strong combustion, the air amount adjusting plate 11b is on the upper side as shown in FIG. 1, the inlet of the cold air wind tunnel 10 is closed, and the air blown from the fan 4 is the hot air wind tunnel 9 and the duct. 8 are supplied. The blown air supplied to the duct 8 passes through the through hole 7 and is sent to the burner 5 as secondary air to improve the combustion characteristics. The wind supplied to the hot-air wind tunnel 9 mixes with the combustion gas on the way and becomes hot air from the hot air outlet 2 and is discharged.
In this state, the amount of air blown by the fan 4 is strong, the warm air velocity at the warm air outlet 2 is fast, and the warm air reaching distance is sufficient.

Next, when the combustion amount of the burner 5 is switched to weak, the blowing amount of the fan 4 is also switched to weak, and in conjunction with this, the plunger 12 operates and the air amount adjusting plate 11b goes down. Second
As shown in the figure, the inlet of the cold air wind tunnel 10 opens, and the inlet areas of the hot air wind tunnel 9 and the duct 8 decrease. Therefore, the wind from the fan 4 is sent to the cold air wind tunnel 10, the hot air wind tunnel 9, and the duct 8. The wind supplied to the duct 8 is sent as secondary air to the burner 5 through the through hole 7 as in the strong combustion, but the air amount at this time is adjusted to the optimum one by the air amount adjusting plate 11b. The generation of NO2 due to excess air volume is prevented. On the other hand, the wind supplied to the warm air wind tunnel 9 is mixed with the combustion gas in the same manner as described above, is guided to the warm air wind tunnel, and is discharged as warm air. However, since the amount of air blown by the fan 4 at this time is weak, the warm air velocity at the warm air outlet 2 is slow, and the discharged warm air tries to rise near the warm air outlet 2. However, at this time, a part of the wind from the fan 4 directly flows into the cold wind wind tunnel 1
Since it is supplied to 0 and is discharged as it is from the cold air outlet 3 located above the hot air outlet 2, this air prevents the temperature from rising and extends the warm air reaching distance.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, according to the present invention, it is possible to suppress the generation of NO2 during weak combustion and at the same time prevent the rise of warm air during weak combustion and extend the warm air reaching distance. You can
Safe and comfortable hot air heating is possible.

[Brief description of drawings]

1 and 2 are sectional views of a warm air heater according to an embodiment of the present invention. FIG. 1 shows a state during strong combustion, and FIG. 2 shows a state during weak combustion. FIG. 3 is a sectional view showing a conventional hot air heater. 1 ... Main body, 2 ... Warm air outlet, 3 ... Cold air outlet, 4
...... Fan, 5 ...... Burner, 6 ...... Combustion cylinder, 7 ...... Perforation, 8 ...... Duct, 9 ...... Hot air wind tunnel, 10 ...... Cold air wind tunnel, 11 b ...... Air volume adjustment plate, 12 ... Plunger, 13 ... Combustion control unit.

Claims (1)

[Claims] 1. A warm air outlet provided on the front surface of the main body case, a cold air outlet provided on the hot air outlet, a fan for blowing air provided on the rear surface of the main body, a burner provided in the main body, and a burner. A combustion control unit that controls the combustion amount of
A combustion cylinder provided so as to surround the burner, a through hole provided in the lower portion of the combustion cylinder, a duct provided for guiding the air from the fan to the through hole, a combustion gas and the air from the fan are mixed to heat the air. A wind tunnel for warm air that leads to the air outlet, a wind tunnel for cold air that directly guides the air from the fan to the cold air outlet, and a duct to change the proportion of air sent from the fan to the duct, the hot air tunnel, and the wind tunnel for cold air. , A hot-air wind tunnel, and an air amount adjusting plate provided at the inlet of the cold air wind tunnel, and this air amount adjusting plate is made to operate in conjunction with the switching of the combustion amount and the blown air amount by the combustion control unit. Hot air heater.