JPH07127856A - Warm air room heater - Google Patents

Abstract

PURPOSE:To reduce discharging of unburnt gas into a room and prevent the generation of bad small upon extinguishing the fire by a method wherein the amount of oil sent for a vaporizer for a predetermined period of time until a nozzle is closed upon fire extinguishing operation is reduced to extremely small amount of oil to supply oil while the temperature of the vaporizer, which is detected by a carburetter thermistor, is controlled so as to be higher than the temperature in a strong combustion. CONSTITUTION:Remaining kerosene and kerosene of extremely small combustion, which are sent to a carbureter 1 immediately before extinction of a burner, are heated by a high vaporization temperature and, accordingly, the kerosene is evaporated quickly whereby the internal pressure of the vaporizer 1 is increased and the kerosene is injected into a burner 3 from a nozzle 2 as high- temperature evaporated gas. Accordingly, the speed of combustion is quickened and remaining kerosene is burnt off without arriving at the limit of flame failure upon shutting the burning off whereby the discharging of unburnt gas into a room can be reduced remarkably. As a result, a warm air room heater, in which the generation of bad smell at time of extinction is reduced, can be provided.

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 in which odor generation during fire extinguishing is reduced.

[0002]

2. Description of the Related Art In recent years, hot air heaters such as oil fan heaters have been improved so that odors during fire extinguishing are reduced.

Conventionally, when a fire extinguishing operation is performed during combustion, whether the combustion before the fire extinguishing operation is strong combustion or slight combustion,
Temporarily reduces the amount of oil to an amount smaller than that of slight combustion, and at the same time, adjusts the temperature of the carburetor, which was controlled to be high combustion with high combustion and low with fine combustion, at the time of extinction with the temperature of slight combustion. It is usual to control the power supply to the carburetor heater so that the carburetor is cooled by releasing the power supply control to the carburetor heater when the pump is stopped. As described above, conventionally, the amount of kerosene ejected from the carburetor at the time of extinguishing was reduced, combustion was continued in that state to some extent, and the unburned gas inside the carburetor and the burner was controlled to be swept ( For example, JP-A-63-129220).

[0004]

The combustion with a smaller amount of oil than the above-mentioned slight combustion oil amount will be referred to as ultrafine combustion. Due to the relationship between the amount of residual kerosene in the carburetor during fire extinguishing, the carburetor temperature, and the pressure inside the carburetor, the carburetor temperature is controlled at a relatively low temperature during ultra-fine combustion during fire extinguishing as well as during fine combustion. Therefore, the pressure inside the carburetor remains low as in the case of slight combustion in normal combustion. Therefore, if the amount of oil burned immediately before extinguishing is greater than the amount of oil slightly burning, a large amount of kerosene remains in the carburetor. And the combustion speed slowed down, and the good combustion reaction could not be continued and was blown off, and there was a problem that unburned gas was released into the room as it was and the foul odor spread.

[0005]

The present invention has been made to solve the above-mentioned problems, and includes a burner for burning vaporized gas, and a vaporizer provided with a nozzle corresponding to the burner.
A carburetor heater and a carburetor thermistor mounted on this carburetor, a pump that variably supplies the amount of oil to the carburetor, a blower that variably supplies the amount of combustion air, and until the nozzle is closed during fire extinguishing operation. The oil amount of the pump sent to the carburetor for a predetermined time is reduced to an extremely small amount of combustion oil that is smaller than the minimum combustion oil amount during normal combustion, and the carburetor temperature detected by the carburetor thermistor is strongly burned. A hot air heater is configured with a control circuit that controls the temperature to be higher than the time.

The fire extinguishing control circuit controls the energization rate to the carburetor heater to be higher than that during strong combustion.

[0007]

The hot air heater according to the present invention reduces the amount of oil of the pump sent to the carburetor for a predetermined time until the nozzle is closed at the time of fire extinguishing operation to reduce the amount of combustion oil to a very small amount, and detects it by the carburetor thermistor. Because the temperature of the vaporizer to be controlled is controlled to a temperature higher than that during strong combustion, the residual kerosene that was sent to the vaporizer immediately before extinguishing and the kerosene that is sent for micro combustion are:
Since it is heated at a high vaporizer temperature, it evaporates quickly, the internal pressure of the vaporizer rises, and a high-temperature vaporized gas is ejected from the nozzle, which increases the combustion speed and does not extinguish when extinguishing a fire. Since the residual kerosene is burnt out, the release of unburned gas into the room is significantly reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

In the figure, reference numeral 1 is a vaporizer for vaporizing liquid fuel such as kerosene, to which a vaporization heater is attached, and a nozzle 2 for ejecting vaporized gas is provided at the tip thereof. Reference numeral 3 denotes a Bunsen burner for burning vaporized gas, which includes a throat portion 3a, a mixing tube 3b, and a flame port 3c, and the throat portion 3a is located at a corresponding portion of the nozzle 2. Four
Is a refueling tank for storing kerosene, and is provided with a refueling valve 4a. An oil pan 5 is detachably attached to an upper part of the oil tank 4 via an oil supply valve 4a, and a constant amount of oil is constantly stored therein. Reference numeral 6 denotes a pump having a variable oil supply amount, which is installed in the oil receiving tray 5 and supplies kerosene in the oil receiving tray 5 to the carburetor 1. A vaporizer heater 7 is attached to the vaporizer 1. A vaporizer thermistor 8 detects the temperature of the vaporizer 1. A solenoid 9 drives the opening / closing of the nozzle 2 of the carburetor 1. The nozzle 2 is closed by the ON operation of the solenoid 9 and is similarly opened by the OFF operation. 10 is a frame rod for detecting flame current,
The burner 3 is installed so as to face the flame formed at the flame port 3c of the burner 3. Reference numeral 11 is a blower that variably supplies the blowing air amount of combustion air, and 12 is a control circuit including a microcomputer, which reads the signals of the frame rod 10 and the carburetor thermistor 8, and the pump 6, the carburetor heater 7, and the solenoid 9 are provided.
Also, the combustion control is performed by outputting a signal to the blower 11 or the like, and the control content will be described below.

The operation of one embodiment of the present invention will be described.

As shown in FIG. 3, for example, from the time when a cut button (not shown) is pressed during operation with strong combustion, the nozzle 2
Until the temperature is closed, the control circuit 11 controls the energization rate of the carburetor heater 7 from that during the strong combustion so that the temperature of the carburetor 1 is adjusted at a temperature Tkk higher than the temperature Tk during the strong combustion. It is controlled to be higher than that, and the amount of oil in the pump 6 is switched to the amount of oil for minute combustion for 5 seconds after the cut button is pressed, and then stopped. Then, the combustion power decreases from the time when the cut button is pressed (fire extinguishing mode).
When the flame current detected by the frame rod 10 drops to 1.9 μA, the control circuit 11 turns on the solenoid 9 at that time.
The nozzle 2 is closed by performing N operation, and after 2 minutes and 30 seconds, the ON operation of the solenoid 9 is released and the nozzle 2 is opened. The blower 11 operates with a slight air volume of slight combustion for 5 seconds from the time when the cut button is pressed, and then for 4 seconds, the burner 3 naturally rotates without energization so as to obtain an appropriate air-fuel ratio. After the solenoid has been turned off, that is, after the flame current has dropped to 1.9 μA, the half-wave brake is applied for 2 seconds to stop. Then, after the blades of the blower 11 are stopped for 4 seconds, the vaporizer 1 and the burner 3 are strongly rotated for 40 seconds to cool.

Due to the operation sequence of the warm air heater according to the present invention as described above, the residual kerosene and the extremely burned kerosene which have been sent to the vaporizer 1 immediately before extinguishing are heated at the high vaporizer temperature Tkk. It evaporates quickly, the internal pressure of the vaporizer 1 becomes high, and a high-temperature vaporized gas from the nozzle 2 is ejected to the burner 3. Therefore, the combustion speed becomes faster, and it remains without reaching the extinguishing limit during extinguishing. Since kerosene is burned out, the release of unburned gas into the room is significantly reduced.

[0013]

As described above, according to the present invention, the residual kerosene and the extremely burning kerosene which have been sent to the vaporizer immediately before extinguishing the fire are:
Since it is heated at a high vaporizer temperature, it evaporates quickly, the internal pressure of the vaporizer rises, and as it becomes hot vaporized gas from the nozzle and is ejected to the burner, the combustion speed increases,
Since the residual kerosene is burned out without reaching the blowout limit when extinguishing the fire, it is possible to significantly reduce the release of unburned gas into the room.

Therefore, it is possible to provide a warm air heater in which a bad odor is not generated when extinguishing a fire.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a warm air heater showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an oil amount and a carburetor temperature with respect to a combustion mode of a warm air heater showing an embodiment of the present invention.

FIG. 3 is a timing chart of the warm air heater according to the embodiment of the present invention.

[Explanation of symbols]

 1 vaporizer 2 nozzle 3 burner 6 pump 7 vaporizer heater 8 vaporizer thermistor 11 blower 12 control circuit

Claims (2)

[Claims] 1. A burner (3) for burning vaporized gas,
A vaporizer (1) provided with a nozzle (2) corresponding to the burner (3), a vaporizer heater (7) and a vaporizer thermistor (8) mounted on the vaporizer (1), and the vaporizer. A pump (6) that variably supplies the amount of oil to (1), a blower (11) that variably supplies the amount of combustion air, and the vaporization for a predetermined time until the nozzle (2) is closed during a fire extinguishing operation. The amount of oil of the pump (6) sent to the device (1) is reduced to a very small amount of combustion oil smaller than the minimum amount of combustion oil during normal combustion to supply oil, and the vaporizer thermistor (8) detects the amount. A warm air heater comprising a control circuit (12) for controlling the temperature of the vaporizer (1) to a temperature higher than that during strong combustion. 2. The warm-air heater according to claim 1, wherein the control circuit (12) controls the energization rate to the carburetor heater (7) to be higher during fire extinguishing than during strong combustion.