JPH08296838A - Hot air heater - Google Patents

Abstract

PURPOSE: To realize a comfortable heater which enables restricting of the generation of extinguishing smell. CONSTITUTION: Condition is created with ay control circuit 18 to stop oil feeding operation of a solenoid pump 1 in an extinguishing operation process after an extinguishing operation while the amount of feeding air decreases gradually during the natural (idle) rotation of a convection fan 12. Under such a condition, combustion proceeds to an gentle end and subsequently, the feeding of air is stopped instantaneously by applying a half wave braking on the convection fan 3 and during the stoppage, complete combustion is accomplished. Thereafter, the convection fan 3 is rotated again to cool and stop a combustor 2, hence completing an extinguishing mode. Thus the generation of odor during the extinguishing is reduced significantly, thereby realizing a comfortable hot air heater.

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 forcibly discharging heat exhaust into a room, and more particularly to a measure for reducing odors when extinguishing a fire.

[0002]

2. Description of the Related Art As a conventional odor reduction measure in this type of heater, as shown in FIG. 4 (for example, Japanese Utility Model Laid-Open No. 63-134251), the convection fan is stopped when the fire is extinguished, and the fuel is supplied after a while. It was carried out by turning off the means and then operating the convection fan again for a certain period of time to cool the combustion part and then stop it.

[0003]

However, in this conventional device, the fuel supply means is turned off during inertial rotation of the convection fan.
As a result, fire extinguishing times often fluctuated, and a strong odor was sometimes emitted.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and includes an electromagnetic pump for sending fuel, a vaporizer for vaporizing the fuel sent from the electromagnetic pump, and this vaporizer. In a warm air heater in which a burner that burns vaporized gas that is jetted and supplied from the burner and a convection fan that forcibly discharges the heat exhaust generated by this burner into the room are connected to the control circuit, the control circuit extinguishes fire. In the process of extinguishing the fire after the operation is performed, the process of stopping the oil feeding of the electromagnetic pump, the process of gradually reducing the air flow rate by the natural (coastal) rotation of the convection fan, and the convection fan following this process A machine that completes the fire-extinguishing mode by executing the process of instantaneously stopping the air flow by applying a half-wave brake to the fan, and the process of rotating the convection fan and then stopping it. As it provided with a configured hot air heater.

[0005]

When the fire extinguishing operation is performed, the control means stops the oil feeding of the electromagnetic pump and the operation of the convection fan in the course of the fire extinguishing operation, and the air flow rate is increased while the natural (inertial) rotation is performed. An environment is created in which the combustion that had been done in the burner until that time is gradually finished is created, and then the half-wave brake is applied to the convection fan to momentarily stop the blast and the final combustion of the air. The operation is terminated in the stopped space, and then the convection fan is rotated again to discharge the combustion gas after complete combustion and cool the combustion device, and then the operation of the convection fan is stopped to complete the fire extinguishing mode.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the hot air heater according to the present invention will be described below with reference to the drawings.

In the figure, 1 is an electromagnetic pump for sending fuel,
2 is a vaporizer for vaporizing the liquid fuel sent from the electromagnetic pump 1, 3 is a vaporizer heater for heating the vaporizer 2, 4
Is a vaporizer thermistor for detecting the temperature of the vaporizer 2 heated by the vaporizer heater 3. Reference numeral 5 is a nozzle for ejecting vaporized gas generated in the vaporizer 2, 6 is a nozzle cleaning rod for opening and closing the nozzle 5, and 7 is a solenoid for driving the nozzle cleaning rod 6. Reference numeral 8 is a burner for receiving and burning the vaporized gas ejected and supplied from the nozzle 5, and 9 is a flame rod for exposing the combustion flame generated in the burner 8 to detect the presence or absence of the combustion flame, Reference numeral 10 is an ignition plug for igniting the fuel gas ejected from the burner 8, and 11 is an igniter for supplying high-voltage electric energy to the ignition plug 10. Reference numeral 12 is a convection fan for discharging the heat exhaust generated by the burner 8 into the heating chamber, 13 is an operation SW, 14 is a disconnection SW, and 15 is a frame detection means for receiving an input from the frame rod 9 regarding the presence or absence of a frame. Reference numeral 16 is a room temperature setting means for setting a heating target temperature of the heating indoor space, 17 is an indoor temperature detecting means for detecting the heating indoor temperature, and 18 is a carburetor thermistor 4, an operation SW 13, an OFF SW 14, and a frame detecting means 1.
5, carburetor heater 3, solenoid 7, igniter 1 based on inputs from room temperature setting means 16 and room temperature detecting means 17
1. A control circuit for controlling the convection fan 12.

When the extinguishing operation is performed by the OFF switch during combustion, the control circuit 18 changes the amount of oil fed by the electromagnetic pump 1 to the combustion mode at that time (for example, fast warm =, strong =, medium =
If weak = ,, fine =, and strong = in the middle of combustion, the amount of oil sent from strong =) is reduced to the lowest combustion mode (weak =) and the convection fan 12
As for the above, the combustion mode rotation speed at that time is lowered to the minimum, the state is continued for t ₁ hours, then the extinguishing mode (oil supply amount 0) is set, and the convection fan 12 is also stopped for t ₂ hours. (Inertia) rotate, then forcibly stop instantaneously by half-wave brake, and from that time point t ₃ convection fan 12 is kept stopped,
Then, after that, the convection fan 12 is again controlled to rotate for a fixed time t ₄ .

The operation of the embodiment constructed as above will be described below.

As shown in FIG. 3, the operation SW 13 is turned on.
Then, the control circuit 18 starts energizing the carburetor heater 3. After that, when the temperature of the carburetor 2 rises to a constant temperature and a predetermined signal is obtained from the carburetor thermistor 4, the control circuit 18 turns on the solenoid 7 to turn on the nozzle 5 of the carburetor 2.
The hole is closed by the cleaning rod 6. Further, when it is determined that the temperature of the carburetor 2 has risen and has reached the predetermined temperature, the operation of the electromagnetic pump 1 is started 4 seconds before the ignition command, and 4 seconds after that, the solenoid 7 is turned off at the same time as the ignition command, The closing of the nozzle 5 by the cleaning rod 6 is released. Then, vaporized gas is ejected from the nozzle 5 and is sent to the burner 8, so that the control circuit 18 turns on the igniter 13 to cause the spark plug 11 to generate sparks and start combustion.

The convection fan 12 starts rotating after a delay of 5 seconds from the ignition command, and blows air.

The frame detecting means 15 is the frame rod 9
When the flame is detected through the control circuit 18, the control circuit 18 shifts to the steady combustion state.

During operation, the combustion mode changes according to the room temperature detected by the room temperature detecting means 17. Combustion mode is ~
The combustion output decreases in the order of the description as follows: fast heating, high, high, medium, low, and weak.

During the fire extinguishing operation, that is, when the OFF switch 14 is turned OFF, the control circuit 18 sets the heat quantity to the lowest combustion mode and the rotation speed of the convection fan 12 in any combustion mode from combustion output to. Is set to the lowest number of revolutions and it is continued for t ₁ hours (5 seconds in this example). During this period, the amount of vaporized gas generated is minimized, so that the temperature of the burner 8 is lowered even if strong combustion has been performed until then, and preparations for extinguishing the fire are prepared.

When the time t ₁ has elapsed, the control circuit 18 stops the drive of the electromagnetic pump 1 to turn it off, and also stops the drive of the convection fan 12 to reveal a gradually decreasing state of the blown air amount due to natural (inertial) rotation. And make the combustion extinguish in a stream of air that has become gentle. After this state is provided for t ₂ hours (4 seconds in this example), the control circuit 18 momentarily stops the air flow by applying a half-wave brake to the convection fan 12 to forcibly stop the air flow, and Allow the final burn to complete.

The control circuit 18 sets the state in which the convection fan 12 is stopped for t ₃ hours (6 seconds in this example), and after continuing the sufficient extinguishing time, this time, the high temperature exhaust gas after extinguishing is extinguished. For discharging and cooling the burner 8 etc., the convection fan 12 is rotated for t ₄ hours (30 seconds in this example), and then t ₄
After a lapse of time, the heating operation is completely stopped.

As described above, as in this embodiment, the control circuit 18
Is a process of stopping the oil feeding of the electromagnetic pump 1 and a natural convection fan 3 during the operation process from the combustion operation to the complete extinguishing state of the fire after the fire extinguishing operation is performed. The process of gradually reducing the air flow rate by inertial rotation, the process of instantaneously stopping the air flow by applying a half-wave brake to the convection fan 3 following this process of gradually decreasing, and the process of rotating the convection fan 3 again and then stopping it. Since it was made possible to execute, it became possible to extremely effectively suppress the occurrence of fire extinguishing odor.

[0018]

As described above, according to the present invention, it is possible to realize a comfortable warm air heater capable of effectively suppressing the generation of odors when extinguishing a fire.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a schematic view showing an embodiment of the present invention.

FIG. 3 is a flowchart of an embodiment of the present invention.

FIG. 4 is a flowchart of a conventional warm air heater.

[Explanation of symbols]

 1 Electromagnetic Pump 2 Vaporizer 8 Burner 12 Convection Fan 18 Control Means

Claims (1)

[Claims] 1. An electromagnetic pump (1) for sending fuel, a vaporizer (2) for vaporizing the fuel sent from the electromagnetic pump (1), and a vaporized gas jetted and supplied from the vaporizer (2) for combustion. In the warm air heater in which the burner (8) to be driven and the convection fan (12) forcibly discharging the heat exhaust generated in the burner (8) into the room are connected to the control circuit (18), the control is performed. The circuit (18) includes a process of stopping the oil feeding of the electromagnetic pump (1) and a convection fan (1
2) a process of gradually reducing the amount of blown air by natural (inertial) rotation, a process of instantaneously stopping the blower by applying a half-wave brake to the convection fan (12) following this gradually decreasing process, and the convection fan ( A warm air heater having a function of completing a fire extinguishing mode by executing a process of rotating and stopping 12) again.