JPH0726761B2 - Hot air heater - Google Patents

Description

The present invention relates to a hot air heater combined with an air cleaning device.

[Conventional technology]

In a conventional combined machine of a warm air heater and an air cleaning device, the inlet and outlet of the warm air and the air inlet and outlet of the air cleaning device are completely separated, and the warm air discharged from the warm air heater is cleaned. Didn't.

In addition, there are also complex models that try to clean the hot air discharged from the warm air heater by installing an air purifier upstream of the blower fan of the warm air heater, but in this case, the hot air outlet is above the blow fan. Was located in.

In a warm air heater, a warm air outlet that is located above the blower fan is usually called "upward blowing of warm air". It is said that the heating efficiency is generally inferior to that of the "warm air blowing" located below the fan.

Next, an example of the conventional warm-air heater of this “warm-air blast” type is shown.

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

FIG. 4 is a side sectional view of the warm air heater when the fire is extinguished or when the blower fan is abnormally stopped.

In FIGS. 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 cylinder, 7 is a wind tunnel, 8 is a blower fan, 9 Is a hot air outlet, 10 is a fan cover, 11 is a main body case, 12 is a louver, 13 is a rotating shaft of the blower fan 8, 14 is a bottom plate, and 15 is attached so as to cover the upstream side of the blower fan 8. An air purifier, 16 is its outer frame, 17 is a dust collector, and 18 is a prefilter.

Next, the operation will be described.

Under normal operating conditions, as shown in FIG.
The heat of combustion from the combustion tube 6 to the wind tunnel 7, and the cold air from the room is the pre-filter 1 of the air cleaning device 15.
8, the dust collector 17, the hole 20 of the fan cover 10 and the blower fan 8 are guided to the wind tunnel 7, where the combustion heat and the cold air are mixed, and an appropriate temperature air is produced through the hot air outlet 9 to the inside of the room. Is released to. At this time, the hot air discharged from the warm air outlet 9 into the room is a clean hot air from which dust and odor have been removed due to the action of the air cleaning device 15 installed on the upstream side of the blower fan 8. become.

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

In case of normal operation stop, after extinguishing the fire, burner 3,
The residual heat from the combustion cylinder 6 rises and only a part of it exits from the hot air outlet 9, but most of it is located at a position higher than the hot air outlet 9 on the blower fan 8 side. As it flows to the 8 side, it passes through the hole 20 of the fan cover 10 and accumulates on the upper part of the outer frame 16 of the air cleaning device 15. Further, when the blower fan 8 abnormally stops during operation due to some influence, the combustion heat flows to the blower fan 8 side until the overheat protector (not shown) in the heater operates. Through the hole 20 of the fan cover 10 and accumulates in the outer frame 16 of the air purifier 15. Even after the overheat protector operates, the high-temperature residual heat of the burner 3 and the combustion cylinder 6 accumulates in the upper portion of the outer frame 16 for several minutes.

[Problems to be Solved by the Invention]

The conventional warm air heater is configured as described above, and particularly when the warm air outlet 9 is located below the blower fan 8 and the air cleaning device 15 is provided on the upstream side of the blower fan 8, the heater is a heater. When the fire is extinguished after using, the residual heat of the burner 3 and the wind tunnel 7 rises to the blower fan 8 side, and the air cleaning device made of plastic parts and chemical fibers provided on the blower fan 8 side. It adversely affects 15 parts. In particular, when the blower fan 8 stops abnormally for some reason while the heater is in use, the combustion heat from the burner 3 is generated until the overheat prevention device provided in the heater operates. There is a possibility that the parts of the air cleaning device 15 may be deformed or destroyed by rising to the blower fan 8 side.

The present invention has been made to solve the above problems, and allows hot air to escape to the outside of the air purifying device without destroying the air purifying device when the blower fan abnormally stops during operation due to fire or for some other reason. The purpose is to obtain a hot air heater that can be used.

[Means for Solving the Problems]

The warm air heater according to the present invention is installed with the central part of the air cleaning device shifted downward with respect to the central part of the blower fan, and does not pass above the air cleaning device without passing through the air cleaning device. A passage for releasing hot air to the outside and a passage for closing the passage for releasing hot air are provided during normal operation, and a shutter device is opened when the fire is extinguished or when the blower fan is abnormally stopped.

[Action]

The hot-air heater according to the present invention releases hot air from the passage through which the hot air escapes without going through the air purifying device when the blower fan stops due to a fire extinguisher or an abnormality. The cleaning device is not destroyed by heat. Further, since the passage can be blocked by the shutter device during normal operation of the warm air heater, the air can be always passed through the air cleaning device to purify the air.

〔Example〕

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

Reference numeral 19 denotes a plurality of holes formed in the upper portion of the outer frame 16 of the air cleaning device 15, and reference numeral 21 denotes a hole 22 facing the hole 19 of the outer frame 16 and having a hole 22 having a slightly larger diameter than that. Shutter plate, outer frame
It is slidably provided along a guide rib 23 provided on the inner surface of 16. Further, the dust collector 17 and the play filter 18 of the air purifying device 15 are attached lower than in the conventional case, and a portion through which hot air passes is provided above the dust collector 17.

Next, the operation will be described.

In a normal operation state, as shown in FIG. 1, if the shutter plate 21 is pulled backward, the hole 19 formed in the upper portion of the outer frame 16 of the air cleaning device 15 is closed by the shutter plate 21. Clean air from the air cleaning device 15 is sent into the wind tunnel 7 through the hole 20 in the fan cover 10 behind the blower fan 8.

Next, when the operation is stopped, or when the blower fan 8 is abnormally stopped due to some influence during operation, as shown in FIG. 2, the operation portion 24 is pushed to push in the shutter plate 21. When the normal operation is stopped by this, after the fire is extinguished, the residual heat from the burner 3 and the combustion cylinder 6 rises, and most of it is
The air flows to the blower fan 8 side located at a position higher than the warm air outlet 9, passes through the hole 20 of the fan cover 10, and further through a hole 19 formed in the upper portion of the outer frame 16 of the air purifying device 15 from the heater. Go outside. Further, if the blower fan 8 abnormally stops during operation due to some influence, the combustion cylinder similarly flows to the blower fan 8 side until the overheat protector (not shown) in the heater operates. After passing through the hole 20 of the fan cover 10, the air is discharged to the outside from the hole 19 provided in the outer frame 16 of the air purifying device 15. Burner 3 for a few minutes after the overheat protector is activated.
The high-temperature residual heat of the combustion cylinder 6 comes out from this hole 19.

In this way, not only during normal operation, but also in the unlikely event that an abnormality occurs on the heater side and the blower fan 8 stops, the air cleaning device
The 15 dust collectors and 17 parts are always protected from the heat of combustion and can be used safely.

Incidentally, in the above-mentioned embodiment, in order to provide a passage for hot air to escape, the arrangement of the components of the air cleaning device 15 is shifted downward,
The degree may be determined by the hot air temperature and the heat resistance of parts.

Further, in the above-mentioned embodiment, the sliding of the shutter plate 21 is performed manually, but it is also possible to provide a means for automatically switching in conjunction with the stop operation of the blower fan 8.

Further, in the above embodiment, the oil warm air heater is illustrated,
It may be a gas warm air heater or another warm air heater.

〔The invention's effect〕

As described above, according to the present invention, the center part of the air purifying device is installed so as to be shifted downward with respect to the center part of the blower fan, and the air purifying device does not pass above the air cleaning device. A hot air escape passage leading to the outside of the machine and a shutter device that shuts off this passage during normal operation and opens when the fire is extinguished or when the blower fan stops abnormally are provided. It is possible to prevent the device from being deformed or destroyed, and hot air is not trapped inside the machine. Furthermore, even if the shutter device cannot be opened completely due to a delay in the operation of the shutter device or a failure, the air cleaning device is installed below the blower fan, so the effect of hot air It is extremely small and has the effect of minimizing damage.

[Brief description of drawings]

FIG. 1 is a side sectional view of a warm air heater during normal operation showing an embodiment of the present invention, and FIG. 2 is a side sectional view of the warm air heater when the fire is extinguished or when a blower fan is abnormally stopped. FIG. 3 is a side sectional view of a conventional warm air heater during normal operation, and FIG. 4 is a side sectional view of the same warm air heater when the fire 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 rotary shaft, 15 is an air cleaner, 16 is an outer frame, 17 is a dust collector, and 18 is a pre-cleaner. A filter, 19 is a hole, 20 is a hole, 21 is a shutter plate, and 22 is a hole. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A heat radiating section for generating hot air, a blower fan for sending hot air rising from the heat radiating section to the outside of the main body as warm air, and an air cleaning device for supplying purified air to the blower fan. In a warm air heater provided below the blower fan and having a warm air discharge port for discharging the warm air to the outside of the main body, the center part of the air cleaning device is shifted downward with respect to the center part of the blower fan. Installed in the air purifier, and the hot air escape passage that leads to the outside of the machine without passing through the air purifier and the hot air escape passage are blocked during normal operation to extinguish fire or blow air. A warm air heater characterized by being provided with a shutter device that opens when the fan stops abnormally.