JP3150599B2 - Open hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a countermeasure against odor at the time of extinguishing a fire in an open-type warm air heater for heating by directly discharging combustion heat into a room.

[0002]

2. Description of the Related Art Conventionally, this kind of odor countermeasure has been taken after a fire extinguishing operation as disclosed in, for example, Japanese Patent Application Laid-Open No. 54-879375 and Japanese Utility Model Application Laid-Open No. 59-92357, which was previously filed by the present applicant. The amount of combustion air to the combustion section is reduced by the air volume adjustment means during the fire extinguishing operation to prevent the fuel oil remaining in the combustion section from becoming too much air and becoming unburned gas and blowing out, resulting in odor. During the fire extinguishing process, the excess air in the fire extinguishing process does not cause the flame to blow out, and the fuel oil still remaining in the vaporized part after the fire extinguishing operation is completely burned to prevent the generation of unburned gas, Was to reduce the odor.

[0003]

By the way, in this prior art, the optimum amount of air for combustion is determined from the start of the combustion operation in proportion to the amount of fuel oil remaining in the vaporization section and gradually decreasing after the fire extinguishing operation. Since it could not be supplied in the entire process until the fire was completely extinguished, even when the flame was extinguished, a lot of vaporized fuel oil that had not yet been burned remained and was blown out as unburned gas, which caused odor to be generated inside the room. There was the disadvantage of spreading.

[0004]

Means for Solving the problems] The present invention focuses on this point, in order to solve the above drawbacks, in particular claim 1 and the configuration
Then, the fuel oil supplied from the electromagnetic pump through the fuel supply pipe and the combustion air supplied by driving the combustion fan are burned in the combustion section, and the combustion heat is forcibly released into the room by driving the convection fan. In the open-type warm air heater for heating, the power supply to the electromagnetic pump is stopped immediately after the fire extinguishing operation, and at the same time, the fuel return control for returning the fuel oil remaining in the fuel supply pipe to the electromagnetic pump is performed. Immediately after operation
Brake control is applied to the combustion fan to quickly brake and burn
A slight amount of fuel oil vaporized in the
The supply of combustion air to the combustion section has been reduced so that
Control means for performing an air supply stop control for stopping the air supply . In claim 2, the structure is particularly described in the claim.
In the item (1), the control means may operate the convection fan immediately after the fire extinguishing operation.
The brake control is applied to the fan to rapidly brake.
In claim 3, the structure is particularly described in claim 2.
The control means, when a predetermined time has elapsed after the fire extinguishing operation,
Driving the stopped combustion fan and convection fan for a certain period of time
Is what you do. In claim 4, particularly, the configuration is the same as the above.
In claim 2, the valve is fully open during normal operation, and is fully opened during operation.
Move the damper section that operates until fully closed between the combustion fan and the combustion section.
And the control means controls the combustion fan after the fire extinguishing operation.
Rake control is performed for rapid braking, and the damper
To reduce the supply of combustion air to the combustion
The air supply stop control for stopping the operation is performed. Claim 5
Then, particularly in the case of the above-mentioned claim 2,
When fully open, the damper that operates from fully open to fully closed when activated
The control means is provided between the combustion fan and the combustion section, and
When the extinguishing of the combustion part is detected after the fire operation, the damper part is fully closed.
Air supply stop system to cut off the supply of combustion air to the combustion section
It is to control.

[0005]

According to the first aspect of the present invention, there is provided an open-type warm air heater.
Immediately after the fire operation, the fuel oil is supplied to the combustion section 1 through the fuel supply pipe 3.
Power supply to the supplied electromagnetic pump 2 is stopped, and
Fuel for returning fuel remaining in fuel supply pipe 3 to magnetic pump 2
By performing the return control, it is left in the fuel supply pipe 3
A part of the fuel oil is returned to the cylinder 17 in the electromagnetic pump 2.
To prevent fuel oil from dripping into the combustion section 1 during fire extinguishing.
After the pump 2 is stopped, the amount of fuel oil vaporized in the combustion section 1 is reduced.
It can be.

Further, the combustion fan 4 is blown immediately after the fire extinguishing operation.
By stopping the rotation by applying sudden braking by key control
And the combustion reduced by performing the fuel return control of the electromagnetic pump 2
For the vaporized fuel oil in part 1
Reduce the amount of combustion air so that the fire does not extinguish due to the extinguishing state
As a result, the amount of fuel vaporized in the combustion section 1 is reduced.
At least a little of the vaporized fuel oil remains as unburned gas.
It can be burned until it is not
It can prevent the generation of odor due to unburned gas of fuel oil.
You.

Further, in the open-type hot air heater according to the second aspect, fire extinguishing is performed.
Immediately after the operation, brake control is applied to the convection fan 12
The main body after the fire extinguishing operation.
The blowout from the outlet 13 is quickly lost and unburned gas
The odor can be more reliably prevented from spreading.

[0008] In the open-type hot air heater according to the third aspect , fire extinguishing.
When a predetermined time has elapsed after the operation, the stopped combustion fan 4
By driving the convection fan 12 for a certain period of time,
After the firing cylinder 7 is cooled down surely and quickly,
Of the combustion cylinder 7 due to the combustion of the fuel oil remaining in the combustion section 1
Can be prevented.

In the open-type hot air heater according to claim 4,
Damper that operates from fully open to fully closed when activated
Section is provided between the combustion fan 4 and the combustion section 1 and the control means is provided.
Step 57 performs brake control on the combustion fan after the fire extinguishing operation.
And the damper unit 50 is actuated.
To reduce the supply of combustion air to the combustion section and stop
By performing the supply stop control, a half-wave is applied to the combustion fan 4.
Just supply for a predetermined time and stop suddenly with rapid braking
The amount of combustion air can be controlled more finely than in the case of
No matter how much air is controlled,
Can be burned to a state where the amount of oil vaporized has decreased, and unburned after extinguishing
The remaining amount of gas is stopped by sudden braking of the combustion fan 4
What can be kept much less than just the case
It is.

[0010] In the open-type warm air heater according to the fifth aspect , the combustion
Normally fully open between fan 4 and combustion section 1
The damper part 50 that operates from the time of
Later, the power supply to the electromagnetic pump 2 is stopped and the fuel return control is performed.
Utotomoni, sudden braking perform the brake control to the combustion fan 4
When the fire extinguishing of the combustion part 1 is detected, the damper
Close the section 50 to shut off the supply of combustion air to the combustion section 1
By performing the air supply stop control, the electromagnetic pump 2
The fuel oil vaporized in the combustion part 1 by the fuel oil return control
And does not burn to a state where it hardly remains
Even if the fire extinguishing of the combustion part 1 is detected,
The supply of combustion air is shut off regardless of the state of
Zero, and even if there is unburned gas in the combustion part 1, it diffuses
Can be prevented.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an open-type warm air heater according to the present invention. An electromagnetic pump 2 is heated by a heating means (not shown) and has a fuel return function.
A fuel unit that vaporizes fuel oil supplied from a fuel supply pipe 3 through a fuel supply pipe 3, pre-mixes the vaporized gas with combustion air supplied by a combustion fan 4, and then vaporizes and burns.
The upper part is provided on the partition plate 6 in the main body frame 5 so as to protrude.

Reference numeral 7 denotes an upwardly open combustion cylinder which covers the outer periphery of the combustion section 1 on the partition plate 6, and is provided at its upper end with a rectifying plate 9 having a plurality of openings 8.

Reference numeral 10 denotes a heat shield plate for closing the upper part of the combustion cylinder 7, and a guide plate 11 is provided between the heat cylinder and the combustion cylinder 7.
A blast from a convection fan 12 provided on the back side, a hot air passage 14 for discharging combustion heat generated in the combustion unit 1 as warm air from a front outlet 13, and a blast for blowing out blast at a temperature lower than the warm air. A path 15 is formed. A guard 16 covers the convection fan 12.

Next, the above-described electromagnetic pump 2 with a fuel return function will be described in detail with reference to the sectional view of FIG. Reference numeral 17 denotes a cylinder, which has a cylindrical shape, and has a flow path 18 in the center at the upper end.
Is fixedly provided, and the cylinder 1
Inside the cylinder 7, a plunger 22 composed of an upper plunger 20 and a lower plunger 21 which reciprocates up and down in the cylinder 17 is provided.

The lower plunger 21 constituting the plunger 22 is located substantially below the inside of the cylinder 17 and has a cylindrical shape whose outer diameter is slightly smaller than the inner diameter of the cylinder 17 and smoothly reciprocates in the cylinder 17. It works. A flow passage 23 is formed in the inside from the upper end to the substantially center, and a suction check valve housing 24 having a larger inner diameter than the flow passage 23 is formed from the substantially center to the lower end. At the lower end of the storage portion 24, a suction check valve seat 26 having a flow path 25 formed at the center is fixedly mounted. The suction check valve seat 26 is provided on the upper surface side of the suction check valve seat 26. A valve 27 is provided.

Further, in the upper space of the suction check valve 27,
A suction check valve spring 28 composed of a coil spring is provided,
The suction check valve 27 is urged downward to the suction check valve seat 26 side. A lower spring 29 composed of a coil spring is disposed in a space in the cylinder 17 between the lower end of the lower plunger 21 and the lower end of the cylinder 17, and urges the lower plunger 21 upward.

The upper plunger 20 constituting the plunger 22 is located substantially at the center of the cylinder 17 and forms a pump chamber 30 between the plunger 22 and a valve seat 19 fixed to the upper end of the cylinder 17. It is a columnar body in which a predetermined number of flow passages 31 having a smaller cross-sectional area than the flow passage 23 of the lower plunger 21 are formed in a circumferential direction in the axial direction. Further, the pump chamber 30
Inside, an upper spring 32 formed of a coil spring is disposed to urge the upper plunger 20 downward.

Further, a skewer-shaped solid push-up member 33 is provided on the upper plunger 20 so as to be able to penetrate through the flow path 18 of the valve seat 19, and a cross-sectional area of the push-up member 33 is upward. The size is such that the fluid can sufficiently pass even in a state where the fluid penetrates the flow path 18.

Reference numeral 34 denotes a discharge joint which is connected above the cylinder 17 and whose center is penetrated from the upper end to the lower end, and the lower part of the penetrating portion is fixed to the upper end of the cylinder 17 and the upper end of the cylinder 17. A seat 35 for accommodating the valve seat 19 is formed.
5, the discharge check valve 36 disposed at the upper end of the valve seat 19 and the discharge check valve 36 disposed thereabove.
A discharge check valve housing 38 is formed in which a discharge check valve spring 37 for urging the valve seat 19 is housed.

Above it, a discharge port 39 formed at the center of the upper end of the discharge joint 34 and a discharge check valve storage 38
And a small-diameter pore portion 40 that communicates with.
The suction check valve spring 28 and the discharge check valve spring 37 are used.
Are weaker springs than the lower spring 29 and the upper spring 32, and the suction check valve 27 and the discharge check valve 36 are respectively positioned below the suction check valve seat 26 and the valve seat 19 side. This causes the suction check valve 27 and the discharge check valve 36 to function as check valves.

A bobbin 41 is wound around an electromagnetic coil 42 so as to be provided substantially at the center of the cylinder 17 in the axial direction. Two bobbins are provided radially from an appropriate position of the upper flange of the bobbin 41. A base having a terminal 43 is extended, and lead wires at both ends of the electromagnetic coil 42 are connected to the terminal 43. A short dimension upper annular magnetic path 44 and a long dimension lower annular magnetic path 45 are provided between the bobbin 41 and the cylinder 17 with a predetermined gap 46 interposed therebetween. 22 is set on the upper side as compared with the equilibrium position.

Reference numeral 47 denotes a yoke which has a U-shaped cross section and bobbin 4 so that the upper annular magnetic path 44 and the lower annular magnetic path 45 are connected.
1 to form a magnetic circuit, which is fixed to the cylinder 17 and is attached at its lower end to a mounting hole formed in the upper surface of the oil receiving tray 4, whereby the electromagnetic circuit is formed. The pump 8 is erected and fixed to the oil pan 4. Reference numeral 48 denotes a suction pipe which is connected to the lower end of the cylinder 17 and has a suction port 49 provided with a filter for removing impurities and the like at its tip.
Are formed.

Reference numeral 50 denotes a damper section, which normally supplies the combustion air supplied by the combustion fan 4 to the combustion section 1 with the blower pipe 51 fully opened, and maximizes the supply of the combustion air to the combustion section 1 during operation. The combustion air which is changed from to and shut off and is not supplied to the combustion section 1 is exhausted to the outside of the heater main body via an exhaust pipe 52 having one end connected to the blower pipe 51.

Numeral 53 denotes a damper driving means. By operating a damper shaft 54, the damper shaft 54 is axially attached to the damper shaft 54, and a connecting portion between the blower tube 51 and the exhaust pipe 52 in the blower tube 51 is connected to the damper drive means 53. Disc-shaped blower damper 55 provided at the position
Then, a disk-shaped exhaust damper 56 pivotally mounted on the damper shaft 54 and provided in the exhaust pipe 52 is rotated.

The blowing damper 55 and the exhaust damper 56
When the blower pipe 51 is fully opened by the blower damper 55, the exhaust pipe 52 is fully closed by the exhaust damper 56, and conversely, the blower pipe 51 When the exhaust pipe 51 is fully closed by the blower damper 55, the exhaust pipe 52 is fully opened by the exhaust damper 56.

Next, the electric circuit will be described. Reference numeral 57 denotes control means comprising a program circuit having functions such as storage, calculation, and comparison provided in the microcomputer 58. The input side is provided with an operation switch 59 for controlling the operation of the heater by ON / OFF. The output side is connected to the gate sides of a first braking means 60 and a second braking means 61 which are bidirectional thyristors for controlling the ON / OFF and driving of the combustion fan 4 and the convection fan 12 in waveform.

The electromagnetic pump 2 is connected to the output side of the control means 57 via a pump drive circuit 62.

Reference numeral 63 denotes a microcomputer 58 similar to the control means 57.
The timer means provided in the controller starts receiving the output signal from the control means 57 and outputs a time-up signal to the control means 57 at the arrival of each preset time.
7, the first and second braking means 60 and 61 and the pump drive circuit 62 are controlled.

Reference numeral 64 denotes a main drive circuit which uses an AC power supply 65 as a power supply, and includes a series circuit of the combustion fan 4 and the driving side of the first braking means 60 and a series circuit of the convection fan 12 and the driving side of the second braking means 61. A circuit and a combustion control circuit 66 for controlling other driving parts such as a heating means are connected to each other.

Next, the pump drive circuit 62 shown in FIG. 4 will be described. A constant voltage circuit 67 is connected to a DC power supply terminal and supplies a constant voltage of 24 V DC to the electromagnetic pump 2.
It is composed of a C chip.

Reference numeral 68 denotes a switching element comprising a transistor connected to the output terminal of the control means 57.
7 controls the pulse wave which is turned ON / OFF by the control signal from 7 and applied to the electromagnetic pump 2, controls the combustion by increasing or decreasing the supply amount of the fuel, and controls the fuel return to return the fuel in the fuel supply pipe 3 at the time of extinguishing. It is what is done.

Next, the operation of the embodiment of the present invention will be described with reference to FIG.
The description will be given according to the Kens diagram. Now, if a fire extinguishing operation in which the operation switch 59 is turned off from the normal operation state is performed, an OFF signal is input to the microcomputer 58 by the operation switch 59, whereby the timer means 63 in the microcomputer 58 starts counting, The control means 57 uses the electromagnetic pump 2
Stop supplying power to

Further, immediately after the control means 57 stops energizing the electromagnetic pump 2, the control means 57 controls the fuel return to the electromagnetic pump 2 so that the fuel oil remaining in the combustion section 1 at the time of fire extinguishing can be reduced. It is possible to suppress the odor due to the unburned gas generated without burning the remaining fuel oil without burning.

That is, when the OFF signal is input to the microcomputer 58, the pump drive circuit 62 receives the control signal of the control means 57 and outputs the electromagnetic wave of the pulse wave at the time of normal driving which changes between about 4 Hz to 25 Hz at 24 V. After stopping the supply to the pump 2 and supplying a high-frequency pulse wave of 300 Hz or more and supplying the pulse wave a predetermined number of times, the on-time of the pulse wave is extended by 4 μsec, and the pulse wave whose pulse width is lengthened is repeated a predetermined number of times. The supply operation is repeated, and the repetition is performed for 1.5 seconds to supply a pulse wave to the electromagnetic pump 2.

Accordingly, the electromagnetic pump 2 is located at a position where the vertical movement of the plunger 22 in the electromagnetic pump 2 cannot follow the repetition rate of the excitation and non-excitation of the electromagnetic coil 42 in the electromagnetic pump 2. By supplying a pulse wave having a frequency of a height that stops, and supplying the pulse wave with the pulse width gradually increased, the plunger 22 in the electromagnetic pump 2 is moved to the uppermost end during normal driving. And moves upward from the top dead center to the upper limit point, and the push-up member 33 protruding from the plunger 22 opens the discharge check valve 36 to remove one of the fuel oil remaining in the fuel supply pipe 3. The part is returned to the cylinder 17 in the electromagnetic pump 2 to prevent fuel oil from dripping into the combustion part 1 at the time of fire extinguishing and to reduce the amount of fuel oil vaporized in the combustion part 1 after the electromagnetic pump 2 stops.

Immediately after the OFF signal is input from the operation switch 59 to the microcomputer 58 by the fire extinguishing operation, the control means 57 controls the combustion fan 4 to perform a half-wave for a predetermined time, for example, 50 minutes in this embodiment, as air supply stop control. Alternatively, a half-wave of a commercial power supply frequency of 60 Hz is supplied for 2 seconds and then the energization is stopped to apply rapid braking to stop the rotation.

[0042] Thus, by performing the fuel return control immediately after stopping electromagnetic pump 2 during fire fighting, to fit to the amount of fuel is decreased to vaporize in the combustion unit 1 after extinguishing operation, the combustion fan 4
After supplying a half-wave to the
In addition, the air supply stop control for stopping the rotation by applying rapid braking is performed to reduce the amount of combustion air sent to the combustion unit 1 after the fire extinguishing operation, and the fuel oil vaporized in the combustion unit 1 after the fire extinguishing operation is blown due to excessive air. Prevents the fire from extinguishing due to the extinguishing state, thereby preventing the generation of unburned fuel gas after the fire extinguishing operation, and suppressing the blowout from the outlet 13 of the main body after the fire extinguishing operation is performed to spread the odor. It is to prevent.

FIG. 6 shows the change over time of the fuel oil amount a and the air amount b after the fire extinguishing operation. When the energization of the combustion fan 4 is stopped after the fire extinguishing operation and the combustion fan 4 is rotated by inertia, vaporization occurs. When the ratio between the fuel oil and the air becomes a1: b1, that is, at point A, the air becomes excessive and the fire is extinguished, and the amount of unburned gas of the fuel oil after the extinguishing becomes I.

Immediately after the fire extinguishing operation in which the operation switch 59 is turned off, a half-wave is supplied to the combustion fan 4 for a predetermined time as air supply stop control.
When the rotation is stopped by sudden braking, the amount of combustion air is smaller than when the combustion fan 4 is rotated by inertia immediately after the fire extinguishing operation. When the ratio of vaporized fuel oil and air becomes a2: b2, that is, when the air becomes excessive at point B and the fire extinguishes, the amount of unburned gas in the fuel oil after the extinguishing is reduced by the combustion fan. 4 is smaller than I when continuously driven.

[0045] Thus, immediately after extinguishing operation, concurrently with providing fuel return control to stop the electromagnetic pump 2, by stopping the rotation over sudden braking combustion fan 4 as an air supply stop control, it occurred after extinguishing operation In addition to suppressing the amount of fuel oil vaporized, the amount of combustion air is also suppressed so that the vaporized fuel oil quickly extinguishes due to excess air and no unburned gas remains. Are to be prevented from remaining.

Further, the operation switch 59 and the microcomputer 58
Immediately after the OFF signal is output and the control means 57 in the microcomputer 58 starts the fire extinguishing operation, the power supply to the convection fan 12 is also stopped, and the convection fan 12 is rotated by inertia to gradually rotate. The number decreases and the air volume decreases,
While weakening the blow-out from the air outlet 13 of the main body after the fire extinguishing operation, the cooling air is sent to the combustion cylinder 7 until the rotation stops even after the fire extinguishing operation is started, and the combustion after the fire extinguishing operation is started This is to prevent overheating of the combustion cylinder 7 due to the combustion of the fuel oil remaining in the section 1.

When the fuel oil vaporized in the combustion part 1 burns after the electromagnetic pump 2 is stopped and the amount of fuel oil to be vaporized becomes very small, the amount of combustion air becomes larger than the amount of fuel oil vaporized, and the flame is blown. The fire goes out and the fire is extinguished. at the time,
The fuel oil vaporized after the electromagnetic pump 2 is stopped is almost completely burned, and unburned gas of the fuel oil is not diffused from the outlet 13 of the main body, thereby suppressing generation of odor. At that time, the rotation of the convection fan 12 due to inertia has already stopped, and there is no blowout from the outlet 13 of the main body after the fire is extinguished, thereby further suppressing generation of odor.

Then, the operation switch 59 is turned off.
Perform a fire extinguishing operation and switch the operation switch 59 to the microcomputer 58.
When the timer means 63 counts 6 seconds after the OFF signal is input and outputs a time-up signal, the convection fan 12 is restarted to surely and quickly cool the combustion section 1 still hot. It drives and stops energization 84 seconds after re-driving. The timer means 63 is also provided with a microcomputer
When a time-up signal is output after counting 10 seconds from the input of the OFF signal to 8, re-driving is performed, and 8 seconds after re-driving.
After 0 seconds, the energization is stopped.

[0049] Furthermore, after the fire extinguishing operation for the operation switch 59 and OFF, to eliminate early balloon from the body outlet 13, in the case of preventing the more diffuse the odor as in Figure 7, the operation An OFF signal is input to the microcomputer 58 by the switch 59, whereby the control means 57 in the microcomputer 58 sends a half-wave to the convection fan 12 for a predetermined time, for example, a half-wave of a commercial power frequency of 50 or 60 Hz in this embodiment. After supplying power for 2 seconds, the power supply is stopped and the convection fan 1
2 is suddenly braked to stop the rotation.

[0050] Thereby, it eliminated quickly balloon is from the main outlet 13 after the fire extinguishing operation to turn OFF the OPERATION switch 59, in which the diffusion of odors can be more reliably prevented.

Next, as another embodiment, immediately after the fire extinguishing operation in which the operation switch 59 is turned off, the control means 57 operates the damper driving means 53 of the damper unit 50 as air supply stop control. The shaft 54 is rotated. As a result, the blower pipe 51 is axially attached to the damper shaft 54 and is changed from the fully opened state to the fully closed state by the blower damper 55 provided in the blower pipe 51, and the exhaust pipe 52 is axially attached to the damper shaft 54 and is connected to the exhaust pipe. The state is changed from the fully closed state to the fully open state by an exhaust damper 56 provided in the inside 52.

Thus, by performing fuel oil return control immediately after the electromagnetic pump 2 is stopped during fire extinguishing, air supply stop control is performed in accordance with the decrease in the amount of fuel vaporized in the combustion unit 1 after the fire extinguishing operation. After the fire extinguishing operation, the amount of combustion air sent to the combustion unit 1 is reduced, and after the fire extinguishing operation, the fuel oil vaporized in the combustion unit 1 is prevented from being extinguished due to the blown-out state due to excess air, and the fuel oil after the fire extinguishing operation is reduced. Prevents generation of unburned gas and blows out the main body from the fire extinguishing operation.
This is to prevent the odor from being diffused by suppressing the blowout from the third.

As the air supply stop control performed by the control means 57, when a half-wave is supplied to the combustion fan 4 for a predetermined time to stop the rotation by sudden braking, the degree of decrease in the number of rotations from rotation to stop is controlled. It is difficult to control the amount of combustion air from rotation to stop.
In the case of 0, since the rotation of the blower damper 55 and the exhaust damper 56 is controlled using a DC motor or the like as the pump driving means 53, the amount of combustion air is controlled more finely than when the combustion fan 4 is suddenly braked. Fire extinguishing due to excess air can be slowed down .

[0054] Further, as shown in FIGS. 9 and 10, the control means
As the air supply stop control performed by the 57 , the half-wave is supplied to the combustion fan 4 for a predetermined time, the energization is stopped, the rotation is stopped by rapid braking, and the damper unit 50 is operated to activate the combustion fan 4. The combustion air amount can be more finely controlled than in the case where only half-wave is supplied for a predetermined time to stop the rotation by sudden braking, so that even if the air amount is controlled, the amount of It is possible to burn to the point C where the amount of vaporization is reduced, and to suppress the residual amount of unburned gas after extinguishing to III which is much smaller than II in the case where only the rotation of the combustion fan 4 is stopped by sudden braking. is there.

[0055] Further, as shown in FIGS. 11 and 12, first luck
Immediately after performing the fire extinguishing operation to turn off the changeover switch 59
Further, the control means 57 performs the combustion fan control as the air supply stop control.
After supplying a half-wave for a predetermined time to
To stop rotation and burn after the fire extinguishing operation
Immediately after Part 1 detects that the extinguished in the state of blow-off flames become air excess, by a blower tube 51 instantly activates the damper unit 50 to the fully closed state, the combustion after extinguishing The unburned gas remaining in the section 1 is prevented from being blown out from the combustion section 1 through the outlet 13 of the main body, so that the diffusion of the odor can be more reliably prevented.

That is, at point B in FIG. 12, when the inside of the combustion section 1 becomes excessive in air and the flame blows out and fire extinguishing is detected, immediately after that, the damper section 50 is operated to completely close the blower pipe 51. At the point D immediately after the fire extinguishing is detected, the state is fully closed.
Thereby, among the unburned gas of the fuel oil remaining in the combustion unit 1 after the fire is extinguished, the unburned gas of IV is not blown out from the combustion unit 1 because the combustion air is not supplied, so that the diffusion of the odor can be surely prevented. Things.

When the damper section 50 is operated, the operation switch 59 is turned off to the microcomputer 58 to prevent the combustion cylinder 7 from being overheated due to the combustion of the fuel remaining in the combustion section 1 after the fire extinguishing operation. Immediately after the signal is output and the control means 57 in the microcomputer 58 starts the fire extinguishing operation, the power supply to the convection fan 12 is stopped and the convection fan 1
2 is rotated by inertia, whereby the number of rotations gradually decreases and the amount of air blows is reduced, and while the blowout from the air outlet 13 of the main body is weakened after the fire extinguishing operation is started, the combustion cylinder is rotated until the rotation stops. It blows air to 7 and cools it.

[0058] Further, conversely, to eliminate early balloon from the body outlet 13, in the case of preventing the more diffuse the odor, OFF signal by the operation switch 59 is the microcomputer 58
To the control means 5 in the microcomputer 58.
Numeral 7 is to stop the rotation of the convection fan 12 by supplying a half-wave for a predetermined time and then stopping the energization to stop the rotation of the convection fan 12 by suddenly braking the convection fan 12.

[0059] As a result, gone early balloon is from the main outlet 13 after the fire fighting operation to OFF luck rolling switch 59, in which the diffusion of odor can be more reliably prevented.

Also in this case, when the timer means 63 counts 6 seconds from the input of the OFF signal to the microcomputer 58 and outputs a time-up signal, the convection fan 12 is driven again, and the power is turned on 84 seconds after the restart. And stop
Timer 63 is turned off by microcomputer 58 for combustion fan 4
When a time-up signal is output after counting 10 seconds from the input of the signal, re-driving is performed, and after 80 seconds from re-driving, energization is stopped, so that the still high-temperature combustion section 1 is reliably and quickly cooled. is there.

[0061]

As described above , the open-type hot air heating of claim 1 is provided.
According to the device, the fuel oil supplied from the electromagnetic pump 2 via the fuel supply pipe 3 and the combustion air supplied by driving the combustion fan 4 are burned in the combustion section 1, and the combustion heat is supplied to the convection fan 12. In an open-type hot-air heater that forcibly discharges air into a room by driving and heats, the power supply to the electromagnetic pump 2 is stopped immediately after the fire extinguishing operation, and
Control to return the fuel remaining in the fuel supply pipe 3 to the fuel supply pipe 3 and brake control to the combustion fan 4 immediately after the fire extinguishing operation.
And abrupt braking is performed.
Combustion so as not to blow out due to excess air against oil
Air supply to reduce and stop the supply of combustion air to part 1
Since the control means 57 for performing the stop control is provided ,
Immediately after the fire extinguishing operation, the power supply to the electromagnetic pump 2 is stopped. Immediately thereafter, the fuel oil return control is performed, and a part of the fuel oil remaining in the fuel supply pipe 3 is returned to the electromagnetic pump 2, and the high-temperature combustion unit 1 The amount of fuel vaporized in the combustion section 1 after the fire extinguishing operation is greatly reduced after the fire extinguishing operation, and the generation of odor due to the unburned gas of the fuel can be suppressed.

At the same time, immediately after the fire extinguishing operation, brake control is performed on the combustion fan 4 as air supply stop control.
By suddenly braking the combustion fan 4 and stopping the rotation, the fuel oil return control is performed and the amount of the fuel oil that evaporates in the combustion unit 1 whose amount has been reduced becomes excessively air and blows out. The amount of combustion air is suppressed to an amount that does not extinguish the fire, whereby the fuel is burned until almost no unburned gas remains, thereby preventing the generation of odor due to the unburned gas of the fuel oil.

Further , according to the open-type hot air heater of claim 2
For example, the combustion fan
4 and the convection fan 12 to perform a brake control to suddenly brake.
The fire extinguishing operation that turns off the operation switch 52
After the crop, blow out from the main body
Thus, the spread of odor can be prevented.

According to the third aspect of the present invention, there is provided an open-type warm air heater.
For example, when a predetermined time elapses after the fire extinguishing operation, the stopped combustion
To drive the fan 4 and the convection fan 12 for a certain time
Cools the combustion cylinder 7 more reliably and quickly, and starts the fire extinguishing operation.
Cylinder due to combustion of fuel oil remaining in the combustion section 1
7 can be prevented from overheating.

According to the fourth aspect of the present invention, there is provided an open-type warm air heater.
For example, between the combustion fan 4 and the combustion unit 1 normally operates at full open
At times, a damper section 50 that operates from fully open to fully closed
Immediately after the fire operation, stop supplying electricity to the electromagnetic pump 2 and return fuel oil.
Control as well as fire suppression operation as air supply stop control.
Later, brake control is performed on the combustion fan 4 and the convection fan 12.
And the damper unit 50 is actuated.
To stop by reducing the supply of combustion air to the combustion unit 1
By performing the air supply stop control, the combustion fan 4
Supply for a predetermined time to stop the rotation by applying sudden braking.
The combustion air volume can be controlled more finely than in the case of
As a result, no matter how much air is controlled, it will not burn
The fuel can be burned to a state where the amount of fuel vaporized has decreased, and
The remaining amount of the combustion gas is stopped by the sudden stop of the combustion fan 4
Can be kept much less than in the case of stopping only
It is.

According to the fifth aspect of the present invention, there is provided an open-type warm air heater.
For example, between the combustion fan 4 and the combustion unit 1 normally operates at full open
At times, a damper section 50 that operates from fully open to fully closed
Immediately after the fire operation, stop supplying electricity to the electromagnetic pump 2 and return fuel oil.
Control, and a combustion fan as air supply stop control.
4 and the convection fan 12 are braked to
When the fire extinguishing of the combustion part 1 is detected,
50 is fully closed to shut off the supply of combustion air to the combustion section 1
Combustion by the fuel return control of the electromagnetic pump 2
The fuel oil that evaporates in part 1 becomes small,
Even if combustion does not take place until
Burns regardless of the state of combustion fan 4 when fire is detected
The supply of air is shut off to zero instantaneously, and
Even if there is a combustion gas, it can prevent it from spreading
is there.

[Brief description of the drawings]

FIG. 1 is a sectional view of an open-type hot-air heater provided with an embodiment of the present invention.

FIG. 2 is a sectional view of the electromagnetic pump.

FIG. 3 is an electric circuit diagram of the main part.

FIG. 4 is a detailed view of the pump drive circuit.

FIG. 5 is a sequence diagram of the main part at the time of fire extinguishing.

FIG. 6 is an explanatory diagram of unburned gas at the time of fire extinguishing.

FIG. 7 is a view of a fire extinguishing when the convection fan is suddenly braked.
Kens diagram.

FIG. 8 is an explanatory diagram of the damper unit.

FIG. 9 is a sequence diagram at the time of extinguishing a fire in an open-type hot-air heater to which another embodiment of the present invention is applied.

FIG. 10 is an explanatory diagram of unburned gas at the time of fire extinguishing.

FIG. 11 is a sequence diagram when the blower pipe is fully closed by a damper part immediately after a misfire during the fire extinguishing.

FIG. 12 is an explanatory diagram of unburned gas at the time of fire extinguishing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion part 2 Electromagnetic pump 3 Fuel supply pipe 4 Combustion fan 12 Convection fan 57 Control means

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masahiro Tamura 7-7 Higashi Shinbo, Sanjo-shi, Niigata Prefecture Corona Co., Ltd. (72) Inventor Takeshi 7-7 Higashi-Shinbo, Sanjo-shi, Niigata Prefecture Corona Co., Ltd. Examiner Toshima Toshima JP-A-6-58531 (JP, A) JP-A-5-215323 (JP, A) JP-A-6-294377 (JP, A) JP-A-3-144211 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 3/04 305 F23N 1/00 105

Claims (5)

(57) [Claims] 1. A combustion unit 1 burns fuel oil supplied from an electromagnetic pump 2 via a fuel supply pipe 3 and combustion air supplied by driving a combustion fan 4, and dissipates this combustion heat to a convection fan 12. In an open-type hot air heater that forcibly discharges air into the room by driving and heats, the power supply to the electromagnetic pump 2 is stopped immediately after the fire extinguishing operation, and at the same time, the electromagnetic pump 2 remains in the fuel supply pipe 3. Performs fuel return control to return fuel and brakes the combustion fan 4 immediately after the fire extinguishing operation.
Control and sudden braking, the slight vaporization in the combustion section 1
Make sure that the fuel
An air supply that stops by reducing the supply of combustion air to the baking section 1
An open-type hot air heater comprising a control unit 57 for performing supply stop control . 2. The control means 57 operates immediately after a fire extinguishing operation.
The open-type hot-air heater according to claim 1, wherein the flow fan (12) is braked to perform rapid braking . 3. The control means 57 operates at a predetermined time after the fire extinguishing operation.
Combustion fan 4 and convection fan stopped
3. The open-type hot air heater according to claim 2, wherein the heater is driven for a predetermined time . 4. Fully open during normal operation, fully open to fully closed during operation
The damper unit 50 that operates until the combustion fan 4 and the combustion unit 1
The control means 57 is provided after the fire extinguishing operation.
In addition to performing brake control on fan 4 for quick braking,
The damper unit 50 is operated to supply combustion air to the combustion unit 1.
It is necessary to perform air supply stop control to stop by reducing the supply.
The open-type warm air heater according to claim 2, characterized in that: 5. Fully open during normal operation, fully open to fully closed during operation
The damper unit 50 that operates until the combustion fan 4 and the combustion unit 1
The control means 57 is provided between the combustion unit 1 after the fire extinguishing operation.
When the fire extinguishing is detected, the damper unit 50 is fully closed and the combustion unit 1 is closed.
The air supply stop control to cut off the supply of combustion air to the
The open-type hot-air heater according to claim 2, characterized in that: