JPH02166350A - Hot air heater - Google Patents

Abstract

PURPOSE:To prevent an air cleaning device from being damaged by hot air by a method wherein a passage for releasing hot air ascending in case of diminishing fire or abnormal stop of an air blowing fan out of a hot air heater without passing through an air cleaner is provided and then the passage is shielded in case of a normal operating condition. CONSTITUTION:Under a normal operating condition, if a shutter plate 21 is pulled rearwardly, a hole 19 at the upper part of an outer frame 16 of an air cleaner device 15 is closed by the shutter plate 21, so that air from the air cleaner device 15 is sent from a hole 20 of a fan cover 10 after an air blowing fan 8 into a air tunnel 7. In case that an operation is stopped, an operating part 24 is pushed to push the shutter plate 21, resulting in that after diminishing fire, a remained heat from a burner 3 or a combustion cylinder 6 is flowed to an air blowing fan 8 which is higher than a hot air discharging port 9, passes through a hole 20 and is discharged out of a heater through a hole 19. During operation, even if an air blowing fan 8 is abnormally stopped, the combustion heat is similarly discharged out of the hole 19 until an excessive temperature preventing device is operated. Accordingly, a dust collector 17 of the air cleaner 15 is protected against the combustion heat and it can be used safely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot air heater combined with an air purifying device.

[Conventional technology]

In a conventional combined machine of a hot air heater and an air purifier, the hot air inlet and outlet and the air outlet of the air purifier are completely separated, and the warm air discharged from the hot air heater is not purified. It wasn't.

There is also a combination model in which an air purifier is installed upstream of the hot air heater's blower fan to purify the hot air discharged from the warm air heater, but in this case, the hot air outlet is located above the blower fan. It was located in

In hot air heaters, when the hot air outlet is located above the blower fan, it is usually called "warm air top blower". It is generally said that the "lower warm air outlet" located below the blower fan is less efficient at heating the room.

Next, an example of a conventional hot air heater of the "S downwind blowing" type will be shown.

FIG. 3 is a side sectional view of a conventional warm air heater during normal operation.

FIG. 4 is a side cross-sectional view of the warm air heater when it is extinguished or when the blower fan stops abnormally.

3 and 4, 3 is a burner, 4 is an electromagnetic pump, 5 is an oil supply pipe connected to the burner 3 via the electromagnetic pump 4, 6 is a combustion tube, 7 is a wind tunnel, 8 is a blower fan, 9 is the hot air outlet, 10 is the fan cover, 11 is the main body case, 12
is a louver, 13 is the rotating shaft of the blower fan 8, 14 is a bottom plate,
Reference numeral 15 denotes an air purifier installed to cover the upstream side of the blower fan 8, 1B is its outer frame, 1F is a dust collector, and 18 is a pre-filter.

Next, the operation will be explained.

Under normal operating conditions, the burner 3
The combustion heat from the combustion chamber is transferred from the combustion tube 6 to the wind tunnel 7, and the cold air from the room is transferred to the pre-filter of the air purifier 15.
18. Dust collector 7. It passes through the hole 20 of the fan cover 10 and the blower fan 8 and is led to the wind tunnel, where the combustion heat and cold air are mixed and become appropriately heated air, which is then sent to the hot air outlet 9.
released into the room. At this time, the warm air discharged into the room from the hot air outlet 9 is clean and free of dust and odor due to the action of the air purifier 15 installed on the upstream side of the blower fan 8. It turns out.

Next, the operation when the operation is stopped and when the blower fan 8 stops abnormally during operation will be explained with reference to FIG.

If normal operation is stopped, after extinguishing the fire, burner 3,
The residual heat from the combustion tube B rises, and some of the gas also comes out from the hot air outlet 9, but most of it is because the blower fan 8 side is located higher than the hot air outlet 9. It flows to the blower fan 8 side, passes through the hole 20 of the fan cover 10, and accumulates on the upper part of the outer frame 16 of the air purifying device 15. In addition, if the blower fan 8 abnormally stops for some reason during operation, the combustion heat flows to the blower fan 8 side until the overtemperature rise prevention vii (not shown) in the heater operates. through the hole 20 of the fan cover 10 to the air cleaner W15.
It accumulates in the outer frame 16 of. Even after the overtemperature protector operates,
For several minutes, the high-temperature residual heat from the burner 3 and combustion tube 6 is released into this outer frame 1.
It will accumulate at the top of B.

[Problem to be solved by the invention]

The conventional hot air heater is configured as described above, and in particular, when the hot air outlet 9 is located below the blower fan 8 and the air purifier 15 is installed upstream of the blower fan 8, the heating When the machine is extinguished after use, residual heat from the burner 3 and wind tunnel 7 rises to the side of the blower fan 8.
Plastic parts and chemicals that are unevenly provided! This will have an adverse effect on the parts of the air purifier 15 that are made of fiber or the like. In particular, when the heater is in use or if the blower fan 8 stops abnormally for some reason, the combustion heat from the burner 3 will continue until the temperature overrise prevention device installed in the heater is activated. , may rise toward the blower fan 8 side, deforming or destroying the parts of the air purifying device 15.

This invention was made to solve the above-mentioned problems, and allows hot air to escape to the outside of the machine without destroying the air purifier when the blower fan stops abnormally during operation, such as when extinguishing a fire or for some other reason. The purpose is to obtain a hot air heater that can be heated.

[Means to solve the problem]

The hot air heater according to the present invention has a passageway through which hot air that rises when a fire is extinguished or when a blower fan stops abnormally is released to the outside of the machine without going through an air purifying device, and a passageway through which warm air is It is equipped with a shutter device that shuts off during operation.

[Effect]

In the hot air heater according to the present invention, when the blower fan stops due to a fire extinguishment or an abnormality, the hot air is released outside the machine from the passage that releases hot air to the outside of the machine without going through the air purifier. The cleaning device will not be destroyed by heat. Further, during normal operation of the warm air heater, the passage can be blocked off by a shutter device, so that the air can always be purified by passing through the air purifying device.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. The same reference numerals as in FIG. 3 indicate the same or equivalent parts.

19 is air purifier! ! 15 is a plurality of holes drilled in the upper part of the outer frame 16, and 21 is a shutter plate with a hole 22 having a diameter slightly larger than the hole 22 opposite to the hole 1 of the outer frame 16. , and is slidably provided along a guide rib 23 provided on the inner surface of the outer frame 1B. In addition, the air purifier 115
The dust collector M17 and the play filter 18 are installed lower than in the past, and have a portion above them through which hot air passes.

Next, the operation will be explained.

Under normal operating conditions, if the shutter plate 21 is pulled backwards as shown in FIG. , the clean air from the air purifier 15 flows through the hole 2 of the fan cover 10 behind the blower fan 8.
0 and sent into the wind tunnel.

Next, when the operation is stopped, or when the blower fan 8 abnormally stops for some reason during operation, the shutter plate 21 is pushed in by pressing the operating section 24 as shown in FIG. If normal operation is stopped due to this, after extinguishing the fire,
Residual heat from the burner 3 and combustion tube B rises, and most of it flows toward the blower fan 8, which is located higher than the hot air outlet 9. It exits from the heater through a hole 19 made in the upper part of the outer frame IB of the cleaning device 115. In addition, if the blower fan 8 abnormally stops for some reason during operation, the combustion heat will flow to the blower fan 8 side in the same way until the overtemperature rise preventer (not shown) in the heater operates. , passes through the hole 20 of the fan cover 10, and is discharged to the outside of the machine from the hole 19 provided in the outer frame 1B of the air purifying device 15. Even after the overtemperature rise preventer operates, the high-temperature residual heat of the burner 3 and combustion tube 6 will continue to come out from this hole 19 for several minutes.

In this way, during normal operation, even if an abnormality occurs on the heater side and the blower fan 8 stops, the dust collection section 4117 of the air purifier 15 is always protected from combustion heat and is safe. It can be used for.

In the above embodiment, the arrangement of the parts of the air purifier 15 was shifted downward in order to provide a passage for hot air to escape.
The extent may be determined based on the hot air temperature and the heat resistance of the parts.

Further, in the above embodiment, a means for sliding the shutter plate 21 may be provided.

In addition, in the above embodiment, an oil hot air heater is illustrated, but
A gas hot air heater or other hot air heater may also be used.

[Effects of the Invention] As described above, according to the present invention, there is provided a passageway through which hot air from the heat radiating section is released without going through an air cleaning device when a fire is extinguished or when a blower fan stops abnormally, and this passageway is connected to a hot air heater. Since a shutter device that shuts off during normal operation is provided, there is no risk of destroying the air purifying device due to hot air, and a safe hot air heater can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a hot air heater showing an embodiment of the present invention during normal operation, and FIG. 2 is a side sectional view of the hot air heater when the hot air heater is extinguished or when the blower fan stops abnormally. FIG. 3 is a side sectional view of a conventional hot air heater during normal operation, and FIG. 4 is a side sectional view of the hot air heater when the hot air heater is extinguished or when the blower fan is abnormally stopped. 3 is a burner, 7 is a wind tunnel, 8 is a blower fan, 9 is a hot air outlet, 10 is a fan cover, 13 is a rotating shaft, 15 is an air purifier, 16 is an outer frame, 1f is a dust collection cabinet, 18 is Pre-filter 119 is a hole, 20 is a hole, 21 is a shutter plate, 22
is a hole. In the figures, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa (2 others)

Claims (1)

[Claims] A heat radiating part that generates hot air, a blower fan that generates warm air by giving airflow to the hot air rising from the heat radiating part,
In a hot air heater having an air purifying device that provides purified air to a blower fan, and a warm air outlet that is provided below the blower fan and blows out warm air sent by the blower fan, when a fire is extinguished or The present invention is characterized by being provided with a passageway through which hot air generated from the heat radiating section escapes without going through an air purifier when the blower fan stops abnormally, and a shutter device which shuts off this passageway during normal operation of the warm air heater. Hot air heater.