JPH0623875Y2 - Open hot air heater - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a countermeasure against odor when extinguishing fire in an open-type warm air heater that discharges combustion exhaust gas into a room for heating.

<Prior Art> Conventionally, this kind of odor countermeasure has been described in, for example, SAIkai 59-923.
As disclosed in Japanese Patent Laid-Open No. 57-57, the fuel supply means for extinguishing the fire and the convection fan are stopped at the same time, and only the convection fan is driven again after a certain period of time to prevent the diffusion of odor due to the driving of the convection fan immediately after extinguishing the fire. At the same time, the combustion part after extinguishing was cooled by a convection fan so that it could be re-combusted in a short time.

<Problems to be solved by the device> However, in this conventional device, the fuel supply means and the convection fan are stopped at the same time when the fire is extinguished, but the convection fan actually rotates for several seconds by inertia even after the driving is stopped. However, the odor was diffused by this, and it was not possible to reliably prevent the odor during fire extinguishing.

<Means for Solving Problems> In order to solve the above-mentioned drawbacks by paying attention to this point, the present invention has a configuration in which a catalyst body 7 for removing an odor is provided above the combustion section 1 to remove the odor. When the fire is extinguished, the convection fan 9 is stopped, and the fuel supply means 2 is turned off after a while,
Further, the convection fan 9 is re-driven after a certain period of time, and is re-driven.
It is designed to stop after cooling.

<Operation> By the fire extinguishing operation, the convection fan 9 is first stopped, and after a while, the fuel supply means 2 is turned off to stop the combustion, and the convection fan 9 is driven again after a lapse of a certain time from the stop of the combustion, and then the predetermined operation is performed. After a lapse of time, the entire operation is stopped and the fire extinguishing operation is completed, and the combustion supply means 2 is turned off a little later than the convection fan 9 so that the combustion continues for several seconds. The temperature rises and becomes a temperature suitable for catalytic action, and odors due to unburned gas are removed. Moreover, combustion is stopped after rotation due to inertia of the convection fan 9 is completed and combustion is stopped, and odor diffusion is reliably prevented. It is possible, and convection fan 9
The combustion part 1 can be cooled in the same manner as in the prior art by restarting.

<Embodiment> Next, an open type hot air heater according to the present invention will be described with reference to a preferred embodiment shown in the drawings.

1 is heated by a heating means (not shown) to vaporize the fuel oil supplied through a fuel supply means 2 such as an electromagnetic valve, and premix this vaporized gas with the combustion air supplied by a combustion fan 3. This is a combustion part for performing post-vaporization combustion, and is provided with the upper part protruding above the partition plate 5 in the main body frame 4.

Reference numeral 6 denotes a combustion cylinder which is open upward and covers the outer periphery of the combustion portion 1 on the partition plate 5, and a catalyst body 7 for removing odor is provided at the upper end so as to close the upper portion.

Reference numeral 8 denotes a heat shield cylinder provided on the outer periphery of the combustion cylinder 6 so as to cover the combustion cylinder 6. The heat shield cylinder 8 is open at the upper side and has an appropriate distance from the combustion cylinder 6.

Reference numeral 9 denotes a convection fan provided on the rear surface of the main body frame 4 behind the heat shield cylinder 8, which is an outlet provided on the lower front surface of the main body frame 4 together with room air for heat exhaust generated by combustion in the combustion section 1 and passing through the catalyst body 7. 1
The air is discharged from 0 as warm air to heat the room.

Reference numeral 11 denotes an operation command circuit including a switch element and the like, which controls the start and stop of combustion.

Reference numeral 12 is a control circuit composed of a microcomputer or the like that receives a signal from the operation command circuit 11 and outputs an operation signal to the fuel supply means 2, the combustion fan 3, the convection fan 9 and the like. It controls elements in a timed manner.

Next, the operation of this embodiment of the invention will be described.

If the fire extinguishing operation is performed to extinguish the heater that is currently burning, a stop signal is input from the operation command circuit 11 to the control circuit 12, the control circuit 12 stops the convection fan 9, and the fuel is delayed by 5 seconds after the stop. The supply means 2 is turned off to stop the combustion, the convection fan 9 is driven again 15 seconds after the stop, and the combustion fan 3 and the convection fan 9 are completely stopped 2 minutes after the extinguishing operation, Fire extinguishing operation is completed.

That is, the fuel supply means 2 is turned off and combustion is stopped after a delay of 5 seconds from the stop of the convection fan 9, so that the inertial rotation of the convection fan 9 is completely stopped in this 5 seconds, and then the combustion is stopped for the first time. , Convection fan 9 as before
And the combustion stop at the same time so that the convection fan 9
The odor immediately after extinguishing is not diffused into the room due to the rotation due to the inertia of, and the diffusion of odor is surely prevented.

Further, the convection fan 9 is driven again 15 seconds after the stop, and the combustion part 1 is cooled together with the combustion fan 3 which is continuously driven, so that reburning can be performed in a short time as in the conventional case. And is no different from the conventional one.

Further, the convection fan 9 is stopped and combustion continues for 5 seconds after the extinguishing operation, so that the temperature of the catalyst body 7 in the upper part of the combustion cylinder 6 rises and becomes the optimum temperature for the catalytic action, and the catalytic effect is also improved. The generation of odor can be suppressed as much as possible.

<Effect of the Invention> In short, the present invention is a warm air heater for forcibly discharging the heat exhausted from the combustion section 1 by the convection fan 9 into the room for heating, and for removing odor above the combustion section 1. Catalyst body 7
When the combustion part 1 is extinguished, the convection fan 9 is stopped, the fuel supply means 2 is turned off with a slight delay, and the convection fan 9 is restarted after a certain period of time to cool the combustion part 1 and then stop. Therefore, the temperature of the catalyst body is suitable for the catalytic action, and the odor due to the end-burning gas etc. is removed and the double deodorization measures can be taken by the diffusion of the odor immediately after extinguishing by the convection fan. As well as being able to reliably prevent odors, it is also possible to re-combust after extinguishing fire in a short time as before.

[Brief description of drawings]

FIG. 1 is a sectional view of an open type hot air heater showing an embodiment of the present invention, FIG. 2 is a block diagram of the electric circuit, and FIG. 3 is a flow chart for explaining the operation. 1 ... Combustion part, 2 ... Fuel supply means, 9 ... Convection fan.

Claims (1)

[Scope of utility model registration request] 1. A warm air heater for forcibly discharging the heat exhausted from the combustion section 1 by a convection fan 9 into a room for heating, and a catalyst body 7 for removing odor is provided above the combustion section 1. When the combustion section 1 is extinguished, the convection fan 9 is stopped, the fuel supply means 2 is turned off with a slight delay, and the convection fan 9 is restarted after a certain period of time to cool the combustion section 1 and then stop. An open-type warm air heater characterized by this.