JPH01285709A - Hot air heater - Google Patents

Abstract

PURPOSE:To reduce the odor at the time of ignition and extinguishment in a hot air heater by stopping fuel supply after combining the operation of a convective air blower with reverse and steady rotary directions in an ignition mode, using adsorbent and reversely rotating the convective air blower in an extinguishment mode. CONSTITUTION:Air for burning is sent in a vaporizing cylinder 10 from an air blower 8 and purge is started. After the air blower 1 is operated in the reverse direction to the steady operation rotary direction, combustible gas is purged in a burning cylinder 5 and odor component is adsorbed by adsorbent 11 from the rear of a hot air heater, hot air is released in a room. After purge, a lighter 4 and an electromagnetic pump 3 are actuated and burning is started on a burner 2. At the time of extinguishment mode, the convective air blower 1 is reversely rotated and operated. After little odor component of burning exhaust gas is further absorbed by the adsorbent 11, it is released in the room from the rear face of the hot air heater. At this time the operation of the electromagnetic pump 3 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a technique for reducing odors during ignition and extinguishing in hot air heating equipment.

Conventional technology Typical conventional hot air heating systems with odor reduction measures include:
It has the configuration shown in FIG. 1 and is operated according to the sequence shown in FIG. 3. The ignition and extinguishing modes will be explained based on FIG. 3 above.

(1) Ignition mode 2 Igniter 4 operates and burner 2
Sparks are continuously released on the flame hole surface. One second later, fuel is supplied from the fuel supply section 3 to the burner 2. and,
The air-fuel mixture forms a flame on the flame hole surface of the burner 2 due to the spark. Until the convection blower 1 starts,
The combustion exhaust gas rises in the combustion tube 5, passes through the oxidation catalyst 6, and is then released into the room through a gap on the back side of the hot air heating device. Approximately 5 seconds (T, time) after the igniter is activated, the convection blower 1 is activated, and the combustion exhaust gas that has passed through the oxidation catalyst 6 is mixed with indoor air and then discharged into the room from the Suita outlet 9.

(Ill Fire extinguishing mode: Fire extinguishing is achieved by stopping the supply of fuel from the fuel supply section 3. The convection blower
It will stop after 20 seconds (T2 time). During this time, the combustion exhaust gas passes through the oxidation catalyst 6, mixes with indoor air induced by the convection blower 1, and is discharged into the room from the Suita outlet 9.

Problems to be Solved by the Invention However, the sequence shown in FIG. 3 cannot be expected to sufficiently reduce odor in the ignition and extinguishing modes for the following reasons.

(1) Ignition mode: At the time of ignition, the oxidation catalyst 6 is not fully heated, so the odor components (aldehydes, hydrocarbons, etc.) in the combustion exhaust gas cannot be oxidized, and moreover, the oxidation catalyst 6 cannot oxidize the odorous components (aldehydes, hydrocarbons, etc.) before reaching stable combustion. , the convection blower 1 is started. For this reason, the odor at the time of ignition is generated from the Suita outlet a since a portion of it escapes from the back side of the hot air heating device, and furthermore, the effect of the oxidation catalyst 6 cannot be expected.

(1) Extinguishing mode: During extinguishing, the oxidation catalyst 6 is sufficiently heated, so that the odor components in the combustion exhaust gas can be oxidized to some extent. However, the logarithmic law (Weber-Fechne
r's law) holds true, even if the odor concentration is reduced to 1/10, the odor intensity will be approximately 1/2
This is only a slight reduction. Therefore, when extinguishing a fire, in order to reduce the odor at the outlet 9 even if the oxidation catalyst 6 is active, the volume velocity should be made sufficiently low to reduce the purification rate of the odor components in the combustion exhaust gas. It needs to be extremely high.

Means for Solving the Problems In order to solve the above problems, the hot air heating device of the present invention includes:
The problem was solved by focusing on the sequence in ignition and extinguishing modes and devising this.

That is, in the ignition mode, the convection blower is operated in the direction opposite to the rotation direction of steady operation, then the igniter and fuel supply section are activated, and after a certain period of time, the convection blower is operated in the rotation direction of steady operation again. It is something to return. In the fire extinguishing mode, the convection blower is rotated in a direction opposite to that during steady operation, and then the operation of the fuel supply section is stopped.

Effects According to the present invention, with the above-described structure, odor can be significantly reduced during the ignition and extinguishing modes due to the following effects. Regarding its effects, we will discuss ignition and extinguishing.

(1) Ignition mode: By operating the convection blower in reverse rotation, it is possible to purge the flammable gas in the combustion cylinder, and also to direct these gases to the adsorbent from the back of the hot air heating device instead of from the outlet. After adsorbing odor components,
Can be opened indoors. When the igniter and electromagnetic pump are activated and combustion begins, the combustion exhaust gas is raised inside the combustion cylinder by a counter-rotating convection blower, and the gas temperature is lowered by exchanging heat with a heat shield plate. Thereafter, the combustion exhaust gas passes through the back side of the hot air heating device, and after absorbing odor components by an adsorbent, it is released into the room.

During this time, combustion takes place stably on the flame hole surface, and the oxidation catalyst is heated and becomes active. Thereafter, the convection blower returns to its normal rotational direction, and the combustion exhaust gas with significantly reduced odor components can be released into the room from the outlet.

(Ill Fire extinguishing mode: The convection blower rotates in the opposite direction, and after the odor components of the combustion exhaust gas are absorbed by the adsorbent, they are released into the room from the back of the hot air heating device. At this point, the fuel When the supply section is stopped,
After the odor components of the combustion exhaust gas are absorbed by the adsorbent, they are released into the room. During this time, all of the combustion exhaust gas is released into the room from the back of the hot air heating device after its odor components have been treated. After the combustion exhaust gas is exhausted, the convection blower rotates in the direction of normal operation, and while removing residual heat from the warm air heating device, hot air without combustion exhaust gas is supplied into the room from the outlet.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIG. 1, a convection blower 1 is installed on the back of the hot air heating device, an electromagnetic pump 3 also supplies kerosene into a vaporizing cylinder 10 pressed into contact with the lower part of the burner 2, and an igniter facing the burner 2. 4, a combustion tube 5 surrounding the burner 2, and an oxidation catalyst 6 provided at the top of the combustion tube 5, the combustion section is configured. The control circuit section 7 controls the convection blower 1, the electromagnetic pump 3, the igniter 4, and the like. The combustion blower 8 supplies combustion air into the vaporizing cylinder 10, and hot air is blown out from the outlet 9 provided at the front of the hot air heating device. An adsorbent 11 made of activated carbon fibers is provided at the air supply port of the convection blower 1. Further, a heat shield plate 12 is attached above the oxidation catalyst 6. In the above configuration, combustion air is sent from the combustion blower 8 into the vaporization cylinder 10, and the ignition purge is started. Thereafter, by operating the convection blower 1 in the opposite direction to the rotational direction during steady operation, the flammable gas in the combustion tube 5 can be purged, and the flammable gas is not discharged from the outlet 9 but instead is used for hot air heating. After allowing the adsorbent 11 to adsorb odor components from the back of the device, it can be opened into the room. After purging, the igniter 4 and the electromagnetic pump 3 are activated and combustion starts on the burner 2. The combustion exhaust gas is moved up inside the combustion tube 5 by the convection blower 1 which rotates in the opposite direction, and is then passed through the oxidation catalyst 6, The gas temperature is lowered by exchanging heat with the heat shield plate 12 and the like. After that, the odor component is absorbed by the agent 11, and then it is released into the room. During this time, combustion is carried out stably on the flame hole surface, and the oxidation catalyst 6 is heated by the combustion exhaust gas and becomes active. Thereafter, the convection blower 1 returns to its normal rotational direction, and the combustion exhaust gas with significantly reduced odor components can be released into the room from the outlet 9.

On the other hand, the fire extinguishing mode is started by the convection blower 1 operating in reverse rotation. After the combustion exhaust gas has a small amount of odor components absorbed by the adsorbent 11, it is released into the room from the back of the hot air heating device. At this point, when the operation of the electromagnetic pump 3 is stopped, the odor components in the combustion exhaust gas are absorbed by the adsorbent 11 and then released into the room. During this time, all of the combustion exhaust gas is released into the room from the back of the hot air heating device after its odor components have been treated. After the combustion exhaust gas is exhausted, the convection blower 1 rotates in the direction of normal operation, and hot air without combustion exhaust gas is supplied into the room from the outlet 9 while removing residual heat from the hot air heating device. I can do it.

Effects of the Invention As described above, the heating device of the present invention provides the following effects.

(1) Set the ignition mode to l and operate the convection blower.
By combining reverse rotation and steady rotation directions and using an adsorbent, odor components at the time of ignition can be significantly reduced.
Moreover, near the 1" blowout, it can be made almost odorless.

(2) In the fire extinguishing mode, by rotating the convection blower in reverse and then stopping the fuel supply, the odor generated when the fuel supply is stopped is removed from the back of the hot air heating device.
After being absorbed by the adsorbent, it can be released into the room, and when the combustion exhaust gas is gone, the convection blower rotates in the same direction as in normal operation, so it is possible to blow odor-free warm air from the outlet. .

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a warm air heating device according to an embodiment of the present invention, FIG. 2 is a sequence diagram of the same device, and FIG. 3 is a sequence diagram of a conventional hot air heating device. 1... Convection blower, 2... Burner, 3...
... fuel supply section, 4 ... igniter, 5 ... combustion tube, 6 ... oxidation catalyst, 7 ... control circuit section, 11.
...Adsorbent. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
1 Itto 1 (Yozakio Sacrifice 6 ---Improvement plot 2nd figure (ti, K ><J conversion No.
3 Diagram (7 Nobleman <Digestion>

Claims (1)

[Claims] a convection blower, a burner, a fuel supply unit that supplies fuel to the burner, an igniter facing the burner, a combustion tube surrounding the burner, and an air intake provided in the convection blower. It consists of an adsorbent made of activated carbon fiber or the like, and a control circuit section that controls the convection blower, a fuel supply section, an igniter, etc., and the control circuit section controls the convection blower in steady-state rotation in the ignition mode. Then, the igniter and fuel supply section are operated, and after a certain period of time, the convection blower is returned to the rotational direction of steady operation, and the convection blower is operated in steady operation in the extinguishing mode. A hot air heating device having a sequence of stopping the operation of a fuel supply unit after the rotation direction is reversed to that of the current rotation direction.