JPH07104048B2 - Open combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an open combustion device such as an oil fan heater.

(B) Conventional technology Since this type of open combustion device discharges the exhaust gas from the burner into the room as warm air, a strong malodor is discharged from the warm air outlet along with the warm air during the fire extinguishing operation. The cause of the bad odor is that the vaporized gas such as kerosene that does not burn up when extinguishing remains in the vaporizer of the burner and changes into a gas with a strong bad odor by contacting the high temperature heating part such as the burner head. It is due to.

Therefore, conventionally, as disclosed in Japanese Utility Model Publication No. 60-36833, there has been proposed a configuration in which the blowing direction from a convection fan for discharging hot air is reversed during a fire extinguishing operation. This method has an advantage that a bad odor at the time of extinguishing can be prevented from being directly sprayed on the user's face. However, since the bad odor is released from the indoor air intake to the room due to the reversal of the convection fan, an irritating odor remains in the room forever, which is not a drastic solution.

(C) Problems to be Solved by the Invention This invention has been made in view of the above-mentioned facts.
While extinguishing the fire, the unburned gas of the burner comes into contact with the high temperature heating part and is released into the room along with the hot air to prevent a bad odor and to prevent the unburned gas from being discharged into the room. To do.

(D) Means for Solving the Problems The present invention relates to a housing having a combustion air intake, an indoor air intake and a hot air outlet, and a temperature connecting the indoor air intake and the hot air outlet in the housing. A convection fan arranged in the air passage and the open combustion cylinder; a burner with a combustion section facing the lower part of the combustion cylinder; and an air supply passage connecting the burner and the combustion air intake. An open type combustion device comprising an air supply fan arranged in the air supply passage, wherein exhaust gas of a burner is made to flow from a combustion cylinder to the hot air passage and discharged from a hot air outlet, and the air supply passage is provided with An opening communicating with the inside of the housing is provided, and a damper device that alternately opens this opening and the air supply passage on the upstream side of the opening is provided, and the opening is opened by the damper device at the time of fire extinguishing operation, and the convection fan is opened. Continue operation for required time Causes, was configured in such a manner as to stop the air supply fan.

(E) Operation When the fire is extinguished, the damper device acts to open the opening (close the air supply passage on the upstream side of the opening), and to continue operation of the convection fan for the required time and stop the air supply fan The internal pressure of the burner becomes negative with respect to the air pressure in the passage. Therefore, the air in the warm air passage flows into the inside of the burner through the combustion cylinder, and the unburned gas inside the burner is collected in a proper place inside the housing through the air supply passage on the downstream side of the opening and the opening. Therefore, it is possible to prevent the unburned gas from coming into contact with the high-temperature heating portion of the burner and being released into the room together with the hot air, and there is no fear that a bad odor is released into the room. Further, the unburned gas can be collected in a proper place in the housing, and the indoor dirt can be reduced.

(F) Examples Hereinafter, the present invention will be described in detail based on the examples shown in the drawings.

In FIGS. 1 and 2, 1 is a warm air outlet 2 on the front side,
Indoor air intake 3 on the back, combustion air intake 4 on the lower part of one side
An air filter 5 is attached to the combustion air intake port 4. A partition plate 6 divides the inside of the housing 1 into a hot air generating portion 7 and a tank housing portion 8 on the left and right sides. A combustion cylinder 9 having an open upper end, a premixed rotary gasification burner 10 facing the lower part of the combustion cylinder 9, a combustion air intake 4 and a burner
A heat shield plate 13 for partitioning and forming an air supply passage 11 for connecting 10 and a warm air passage 12 for connecting the indoor air intake 3 and the hot air outlet 2
The convection fan 15 driven by the convection motor 14 and the combustion cylinder 9 are provided in the hot air passage 12.
A cartridge tank 16 and an oil sump tank 17 are provided in the tank accommodating portion 8, and an appropriate amount of kerosene is supplied from the cartridge tank 16 to the oil sump tank 17. Also,
An electromagnetic pump 19 for sending kerosene from the oil sump tank 17 to the burner 10 via an oil supply pipe 18 is attached to the upper surface of the oil sump tank 17. The burner 10 is a burner body having a vaporization heater 20.
21, a rotary atomizer 23 housed in the vaporization chamber 22 inside the burner body, and a burner head 24, after kerosene sent from the oil supply pipe 18 is atomized by the rotary atomizer 23, The atomized fuel is vaporized by utilizing the heat of the vaporization heater 20 or the burner head 24, and the vaporized fuel and the combustion air from the air supply passage 11 are mixed and burned by the burner head 24.
An ignition device 25 is attached near the burner head 24. As shown in FIG. 3, the air supply passage 11 is provided with a damper device 26 on the combustion air intake 4 side and an air supply fan 27 on the burner 10 side. The damper device 26 includes an opening 28 provided in the air supply passage 11 and an opening 30 of a partition wall 29 provided in the air supply passage 11 upstream of the opening 28 as a valve body.
A spring body that is alternately opened at 31 and that applies a clockwise rotating force to the valve body 28 so that the valve body 31 closes the opening 28.
32 and an electromagnetic valve 33 that applies a counterclockwise rotational force to the valve body 31 against the spring body 32 so that the valve body 31 closes the opening 30. The air supply fan 27 pressurizes the combustion air in the air supply passage 11 and supplies it to the burner 10, and is attached to the rotary shaft 35 of the combustion motor 34, which is a distribution motor, together with the rotary atomizer 23. ing. Furthermore, the opening 28 communicates with the upper space inside the oil sump tank 17 via a communication pipe 36.

FIG. 4 shows a control device for the above-mentioned open combustion device.

In FIG. 4, 37 is an AC power supply, 38 is a step-down transformer, 39
Is a DC power supply circuit, 40 is a control circuit such as a microcomputer, 41 is an operation switch, and the control circuit 40 is equipped with a vaporization heater 20 and a combustion motor 3 via relay switches 42 to 46.
4, the convection motor 14, the ignition device 25, the electromagnetic pump 19 and the electromagnetic valve 33 are energized and controlled. Reference numeral 47 is a drive circuit for the combustion motor (DC motor) 34, 48 to 50 are diodes, 51 and 52 are resistors, and 53 is a capacitor.

Next, the operation of the apparatus of the above-described embodiment will be described. When the operation switch 41 is turned on, the control circuit 40 first closes the relay switch 42, energizes the vaporization heater 20, and raises the temperature of the burner body 21 of the burner 10. When the burner body temperature reaches or exceeds the predetermined temperature, the relay switch 43 is closed, the air supply fan 27 is rotated by the energization of the combustion motor 34, and the room air passes through the combustion air intake port 4 and the air supply passage 11. Is supplied to the burner 10 and pre-purging is performed. Relay switch
When the specified time has passed after 43 was closed, the relay switch
When 44 is closed and the convection motor 14 is energized, the convection fan 15 rotates and the indoor air is passed through the indoor air inlet 3 to the warm air passage.
Introduce to 12. Further, the relay switch 45 enters a normally open (NO) contact to energize the ignition device 25 and energize the electromagnetic pump 19. Therefore, kerosene is supplied from the oil sump tank 17 to the burner 10, the mixed gas of vaporized gas and combustion air is ignited, and combustion is started. And the hot air passage 12
The indoor air introduced into the combustion chamber 9 hits the combustion tube 9 and is heated, and is mixed with the exhaust gas of the burner 10, and the warm air outlet 2
Is discharged into the room.

During combustion, the relay switch 46 is opened, and the solenoid valve 33 is not energized. Therefore, the valve body 31 of the damper device 26 is closed in the opening 28 and the opening 30 is opened. Further, the relay switch 42 opens when the temperature of the burner body 21 is further increased by heat conduction from the burner head 24 to the burner body 21.

When the operation switch 41 is opened, the control circuit 40 stops combustion as follows. First, the control circuit 40 is a relay switch
45 is switched to a normally closed (NC) contact, and the electric charge of the capacitor 53 is quickly discharged through the resistor 52 to stop the electromagnetic pump 19 and extinguish the fire. Also, the relay switch 43 opens,
Stops the combustion motor 34 and also relay switch
46 is closed and the solenoid valve 33 is energized. Therefore, the valve body 31 of the damper device 26 has an opening 30 as shown by a broken line in FIG.
And the opening 28 is opened. Further, since the air supply fan 27 stops immediately (in 2 to 3 seconds) and the convection fan 15 continues to operate, the air pressure in the warm air passage 12 becomes higher than the pressure inside the burner 10 and the air supply passage 11. . The unburned gas in the vaporization chamber 22 is not supplied to the burner head 24, and the air supply passage 11 and the opening 28
And, it is collected in the air portion of the oil sump tank 17 through the connecting pipe 36, cooled there, and liquefied. When the required time has passed since the operation switch 41 was opened and the recovery of unburned gas is completed,
The relay switches 44 and 46 are opened, the convection motor 14 is stopped, and the solenoid valve 33 is de-energized. in this way,
Since unburned gas inside the burner 10 can be collected in the oil sump tank 17 without being discharged into the room together with the warm air during the fire extinguishing operation, it is possible to prevent a bad odor from being emitted indoors.

(G) Effect of the Invention Since the present invention is configured as described above, it is possible to prevent the unburned gas of the burner from coming into contact with the high temperature heating part during fire extinguishing, and further being released into the room together with warm air. There is no fear that a bad odor will be emitted inside the room due to fire extinguishing, and unburned gas can be collected in a proper place in the housing to keep the room clean.

[Brief description of drawings]

1 to 4 relate to an apparatus according to an embodiment of the present invention. FIG. 1 is a sectional view and FIG. 2 is A- of FIG.
A sectional view of a portion along the line A ′, FIG. 3 is an enlarged sectional view of an essential part,
FIG. 4 is a control device and an electric circuit diagram. 1 ... Housing, 2 ... Warm air outlet, 3 ... Indoor air intake, 4 ... Combustion air intake, 10 ... Burner, 11 ... Air supply passage, 12 ... Warm air passage, 15 ... … Convection fan, 17 …… Oil sump tank, 26 …… Damper device, 27 …… Air supply fan, 28
…… Aperture, 36 …… Communication pipe.

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location F23K 5/14 502 F24H 3/04 305 Z

Claims (2)

[Claims] 1. A convection fan and an upper part arranged in a warm air passage connecting a combustion air intake, an indoor air intake and a hot air outlet, and a room air intake and a hot air outlet in the housing. An open combustion cylinder, a burner with a combustion section facing the lower part of the combustion cylinder, an air supply passage connecting the burner and the combustion chamber air intake, and an air supply arranged in the air supply passage. An open-type combustion apparatus comprising a fan and causing exhaust gas of a burner to flow from a combustion cylinder to a warm air passage and to be discharged from a warm air outlet, wherein the air supply passage has an opening communicating with the inside of the housing. Along with this, a damper device that alternately opens this opening and the air supply passage on the upstream side of the opening is provided, and at the time of fire extinguishing operation, the opening is opened by the damper device, and
While continuing the operation of the convection fan for the required time,
An open type combustion device, characterized in that it is configured so that the air supply fan is stopped. 2. The open combustion apparatus according to claim 1, wherein the opening communicates with a fuel storage tank inside the housing via a connecting pipe.