JPH04110340U - Open hot air heater - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the odor when extinguishing an open hot air heater that heats the room by emitting combustion heat directly. [Structure] When a fire extinguishing operation is performed by opening the operation switch 13, a fire extinguishing signal is input to the control means 11, and the fuel supply means 2
The combustion blower 3 and the convection blower 9 are each stopped to extinguish the fire.On the other hand, the combustion blower is activated by a time-up signal after a predetermined time from the timer means 18 which starts counting in response to the input of the extinguishing signal. 3 and the convection blower 9 are driven again to cool the combustion section 1, which eliminates the odor that was generated when both blowers 3 and 9 were driven continuously to cool the combustion section 1 immediately after the fire was extinguished. It is possible to reliably prevent this and obtain good heating without worrying about odor.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is used when extinguishing an open hot air heater that heats the room by directly emitting combustion heat. This is related to odor countermeasures.

0002

[Conventional technology]

Conventionally, this type of odor countermeasure has been disclosed, for example, in Japanese Utility Model Application Publication No. 134251/1983. As described above, when a fire is extinguished, the convection blower is stopped and then the fuel supply means is turned on a little later. Then, after a certain period of time, the convection blower is started again to cool the combustion section. The system was designed to stop after the fire was extinguished, thereby reducing the odor generated when the fire was extinguished.

0003

[Problem that the idea aims to solve]

By the way, with this conventional type, the combustion blower continues to operate even after the fire extinguishing operation to prevent combustion. Since the engine was designed to stop after the fuel supply had cooled down, the combustion supply continued even after the fuel supply means was turned off. Since the wind fan is being driven, the unburned gas remaining in the combustion section is blown by the combustion fan. Therefore, it is released outside the equipment and floats inside the room, so only the convection blower should be If you just stop the odor, it will prevent the odor from spreading to some extent, but it will completely prevent the odor from occurring. Therefore, reliable odor prevention could not be expected.

0004

[Means to solve the problem]

This invention focused on this point and in order to solve the above drawbacks, the structure was specifically designed to improve the fuel supply. the fuel supplied by the means and the combustion air supplied by the drive of the combustion blower. is combusted in the combustion section, and this combustion heat is forced into the room by a convection blower. In a hot-air heater that discharges heat and heats air, the fuel supply means and combustion The wind fan and convection fan will be stopped, and the combustion fan and convection fan will be turned off after a specified period of time. The diversion blower is driven again to cool the combustion section and then stopped. Ru.

[0005]

[Effect]

When the fire extinguishing operation is performed, the fuel supply means 2 is first turned off one second after this operation, and then the fuel supply means 2 is turned off. Then, a half wave is applied to the convection blower 9 at the same time as the extinguishing operation, preventing sudden braking. After 2 seconds, the combustion blower 3 is stopped and the combustion blower 3 is stopped by the fuel supply means 2. After turning off, a half wave is applied, and 2 seconds after this application, that is, 1 second after the convection blower 9 is stopped. Then, the convection blower 9 and the combustion blower 3 are both stopped at a predetermined time. After 3 seconds, the drive starts again to cool the combustion section 1 and extinguish the fire as a whole. 1 minute and 30 seconds after the operation, the convection blower 9 and combustion blower 3 are restarted for cooling. The fire will stop moving and the fire will be completely extinguished.

[0006] Therefore, since the convection blower 9 and the combustion blower 3 are temporarily stopped after combustion has stopped, It is possible to reliably prevent unburned gas from being released outside the appliance immediately after extinguishing the fire, and After the predetermined time has passed, the convection blower 9 and the combustion blower 3 are activated again to start the combustion process. This cools the combustion zone 1 and enables re-combustion in a short time.

[0007]

【Example】

Next, the open hot air heater according to this invention will be explained using a preferred embodiment shown in the drawings. do. 1 is heated by a heating means (not shown) and is supplied via a fuel supply means 2 such as a solenoid valve. At the same time, this vaporized gas and the combustion blower 3 are used to vaporize the fuel supplied. A combustion section that premixes the supplied combustion air and then vaporizes and burns it. It is provided on the cutting plate 5 with the upper part protruding.

[0008] Reference numeral 6 denotes an upwardly open combustion tube that covers the outer periphery of the combustion section 1 on the partition plate 5. A catalyst body 7 for odor removal is provided so as to be closed. Reference numeral 8 denotes a heat shield tube provided on the outer periphery of the combustion tube 6 to cover the combustion tube 6, and the upper part is open. At the same time, there is an appropriate distance between the combustion tube 6 and the combustion tube 6.

[0009] 9 is a convection blower installed on the back of the main body frame 4 behind the heat shield plate 8; Combustion heat generated during combustion and passed through the catalyst body 7 is stored in the lower front of the main body frame 4 together with the indoor air. The hot air is discharged from the air outlet 10 to heat the room. Reference numeral 11 indicates various functions such as storage, calculation, and comparison provided in the microcomputer 12. A control means consisting of a program circuit with The output side is equipped with an operation switch 13 for controlling the operation of the operation switch 1. Light-emitting elements 14 and 15 whose light-emitting period can be varied by turning OFF, that is, extinguishing operation in step 3, and conduction control First and second relays 16 and 17 are respectively provided.

0010 18 is a timer provided in the microcomputer 12 like the control means 11. - the means receives the output signal from the control means 11, starts timekeeping, and starts timing at each preset time; Upon arrival, a time-up signal is output to the control means 11, and the above-mentioned It controls the light emitting elements 14 and 15 and the first and second relays 16 and 17.

[0011] 19 is a drive circuit powered by an AC power source 20, which connects the combustion blower 3 and the light receiving element 21. in series with a first damping means 22 consisting of a bidirectional thyristor waveform controlled by A bidirectional circuit whose waveform is controlled by the circuit and the convection blower 9 and the light receiving element 23. A series circuit with the second braking means 24 consisting of a lister and a normally open type of the first relay 16. Through the first relay contact 16a, the fuel supply means 2 and other drives such as heating means, etc. A combustion control circuit 25 that controls the components is connected to each of them.

0012 Also, a normally open second relay of the second relay 17 is located closest to the power supply 20 of this drive circuit 19. - The contact 17a is connected to control the energization of the drive circuit 19. Furthermore, the first and second braking means 22 and 24 are paired with each light emitting means 14 and 15. Due to the switching action of the light receiving elements 21 and 23 that receive the corresponding light, the combustion The frequency applied to the baking blower 3 and the convection blower 9 is controlled to full wave or half wave. When applied with AC voltage by half wave, it is driven normally, and when DC voltage is applied by half wave - The stator inside the rotor is magnetized to apply braking force to stop rotation instantly.

[0013] Next, the operation of this embodiment will be explained according to the sequence diagram of FIG. If you now perform a fire extinguishing operation by turning off the operation switch 13, a signal to the control means 11 will be sent. By changing from the "H" signal to the "L" signal, the control means 11 starts the timer hand. The stage 18 starts timing, the light emitting element 15 is controlled to emit light, and the light is emitted via the light receiving element 23. Then, the waveform control of the braking means 24 is set to half wave, and direct current is applied to the convection blower 9 to extinguish the fire. The device is temporarily stopped two seconds after operation to prevent odor from spreading.

[0014] Also, the timer means 18 counts one second from the extinguishing operation and starts the timer via the control means 11. By stopping the energization of the first relay 16, the first relay contact 1 in the drive circuit 19 6a is opened and the energization of the fuel supply means 2 and the combustion control circuit 25 is stopped. This is the first time combustion is stopped, and the convection blower 9 is turned off for 1 second after the fire extinguishing operation. As the wind power decreases, the catalyst body 7 of the combustion tube 6 is heated to maintain a good catalytic temperature. Catalytic action also reduces odor.

[0015] Further, the light is emitted at the same time as the control means 11 issues a power stop signal to the first relay 16. A signal from the control means 11 is also output to the element 14 to control light emission, and the light receiving element 21 Direct current is applied to the combustion blower 3 through half-wave waveform control of the braking means 22. , the extinguishing operation is temporarily stopped 3 seconds after the extinguishing operation, and the unburned gas in the combustion section 1, which has been diffused in the past, is removed. This prevents the release of gas and reliably reduces odor.

[0016] In addition, the combustion blower 3 and the convection blower 9 are set to a timer means when 3 seconds have passed after the drive is stopped. 18 measures the time, the control means 11 controls the light emitting elements 14 and 15, and the light emitting elements 14 and 15 are The braking means 22 and 24 are controlled full-wave through the optical elements 21 and 23 to apply alternating current. By starting the drive again, the combustion section 1, which is in a high temperature state immediately after the extinguishment, is cooled and prepared for re-combustion. Furthermore, this re-driving for cooling takes 1 minute and 25 minutes for the combustion blower 3. seconds later, and the convection blower 9 is activated by the timer means 18 after 1 minute and 24 seconds. When the second relay 17 is de-energized by the up signal, the second relay connection in the drive circuit 19 is When point 17a is opened, all drives stop and the fire extinguishing operation is completed for the first time. be.

[0017] Therefore, by extinguishing the fire, both the combustion blower 3 and the convection blower 9 are It is possible to stop the fire once and reliably prevent the spread of odors, especially when the fire is extinguished immediately. Later, the combustion blower 3 also stops blowing air to the combustion section 1 where unburned gas remains. By doing so, more powerful odor reduction was achieved, and both blowers 3 ・After stopping both 9 and 9, restart the drive again to cool the combustion section 1 and prepare for re-combustion. It can be used just as well as conventional products.

[0018]

[Effect of the idea]

In short, this invention uses the fuel supplied from the fuel supply means 2 and the combustion blower 3. The combustion air supplied by the drive of the In a hot air heater that performs heating by forcibly discharging air into the room by driving the air blower 9. When the fire is extinguished, the fuel supply means 2, combustion blower 3, and convection blower 9 are stopped. At the same time, the combustion blower 3 and the convection blower 9 are driven again after a predetermined period of time. Since the combustion section 1 is cooled down and then stopped, the combustion section 1 is stopped when extinguishing. Both the blower and convection blower should be temporarily stopped to prevent the spread of odors when extinguishing a fire. In particular, by temporarily stopping the combustion blower at the same time, unburned gas can be removed immediately after the fire is extinguished. Air is also prevented from blowing to the combustion area, which is full of gas, and this unburned gas is used to It can reliably prevent odors that are generated by floating outside, so you don't have to worry about odors. It is possible to provide an open-type hot air heater that does not require air heating, and even after both blowers are The engine restarts its operation and cools the combustion section to prepare for re-combustion without any changes from before. It is extremely easy to use.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an open hot air heater to which an embodiment of the invention is attached.

[Fig. 2] The electrical circuit diagram.

FIG. 3 is a sequence diagram of the main parts.

[Explanation of symbols]

1 Combustion part 2 Fuel supply means 3 Combustion blower 9 Convection blower

Claims (1)

[Scope of utility model registration request] Claim 1: Fuel supplied from fuel supply means 2;
In a hot air heater that performs heating by combusting combustion air supplied by the combustion blower 3 in the combustion section 1 and forcibly releasing this combustion heat into the room by driving the convection blower 9. When the fire is extinguished, the fuel supply means 2, the combustion blower 3, and the convection blower 9 are stopped, and after a predetermined time, the combustion blower 3 and the convection blower 9 are driven again to cool the combustion section 1, and then stopped. An open type hot air heater characterized by the following features.