JPH025308Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a hot air heater.

As shown in Fig. 3, a conventional hot air heater has a burner 4 in front of a blower mechanism consisting of a casing 3 and a runner 2 driven by a fan motor (not shown).
and a heat exchange chamber 11 housing a heat exchanger 9 were sequentially connected. Therefore, the heat exchanger 9
The size of the hot air heater has to be large in order to improve contact with the air blown by the runner 2 and to efficiently exchange heat, which has the disadvantage that the hot air heater including the casing 3 becomes large.

The present invention was developed in order to eliminate the above-mentioned drawbacks.A heat exchange pipe is installed along the inner peripheral wall of the casing of the hot air fan to guide the combustion gas burned in the burner, and the heating center surface of the heat exchange pipe is The cool air sucked by the runner of the hot air fan is aligned with the face plate of the runner of the hot air fan or separated from the side opposite to the suction port, and heat is exchanged with a heat exchange pipe installed along the inner circumferential wall of the casing. The hot air is efficiently generated, thereby eliminating the need to install a separate large-sized heat exchanger, achieving high heat exchange, and providing a structure that can be downsized.

An embodiment of the present invention will be described below with reference to the drawings.

The configuration of the embodiment is as shown in FIGS. 1 and 2,
1 is a fan motor, and 2 is a runner, which together with the fan motor 1 constitute a hot air fan.
Further, 2a is a suction port for sucking air into the runner 2, 2b is a face plate directly connected to the fan motor 1, and 2c is a blade. 3 is a casing that forms the exterior of the hot air heater. 4 is a burner,
Gas and air are supplied from outside the casing 3, and the mixed gas is combusted. Reference numeral 5 denotes a plurality of heat exchange pipes, which are provided along the inner circumferential wall of the casing 3 so as to surround the periphery of the runner 2 after passing through the burner 4, and guide the combustion gas combusted by the burner 4. Furthermore, the heating center plane A of the heat exchange pipe 5
is made to coincide with the face plate 2b of the runner 2, or to be separated from the side opposite to the suction port. That is, the second
In the figure, the positional relationship is H≧0. Reference numeral 6 denotes an exhaust port, which is formed at the end of the exit side of the heat exchange pipe 5 and discharges exhaust gas to the outside of the casing 4. Reference numeral 7 denotes an air suction port, which is opened to face the runner 2 of the casing 3 and sucks cold air from outside the casing 3. Reference numeral 8 denotes a hot air outlet for discharging hot air inside the casing 3 to the outside of the casing 3.

The operation of this embodiment will be explained below. Gas and air are supplied to the burner 4 from the outside, and it burns.
The combustion gas passes through the vicinity of the hot air outlet 8, enters a plurality of heat exchange pipes 5 provided along the inner peripheral wall of the casing 3, is led to an exhaust port 6, and is discharged outside the casing 3. On the other hand, when the fan motor 1 is driven, the runner 2 rotates, and cold air is sucked into the casing 3 from the air suction port 7.
a and the blades 2c, and exchanges heat with the combustion gas in the heated heat exchange pipe 5 flowing opposite the flow path,
The heated air becomes hot air, which is discharged from the hot air outlet 8 to the outside of the casing 3 to heat the room.
At this time, the heating center plane A of the heat exchange pipe 5 and the runner 2
The structural positional relationship with the face plate 2b of the runner 2 is such that the heating center plane A of the heat exchange pipe 5 is located on the back side when the suction port 2a is taken as a reference.
Since it is arranged so that it coincides with the
The flow direction of the airflow discharged to the side and the heating center plane of the heat exchange pipe 5 can be made to substantially coincide.
On the other hand, since the runner 2 has a single suction, a large amount of air flows toward the face plate 2b as indicated by the arrow B. Due to the above-mentioned positional relationship, the air is effectively blown to the heating center surface A of the heat exchange pipe 5, and heat exchange is performed efficiently. It is something that can be done.

As described above, according to the present invention, a heat exchange pipe is provided along the inner peripheral wall of the casing to surround the runner of the hot air fan, and guides the gas combusted by the burner, and the heating center surface of the pipe is positioned further back than the face plate of the runner. The runner of the warm air fan draws cold air from outside the casing, flows it against the combustion gas flowing inside the heat exchange pipe, exchanges heat, and discharges it outside the casing from the hot air outlet. The heater does not require a large heat exchanger to be installed in front of the hot air fan as in conventional systems, allowing for high heat exchange.
It also has the effect of being able to be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a hot air heater showing an embodiment of the present invention, Fig. 2 is a side sectional view of the same hot air heater, and Fig. 3 is a front view of a conventional hot air heater. FIG. 1...Fan motor, 2...Runner, 2a...
Suction port, 2b... face plate, 3... casing, 4...
...Burner, 5...Heat exchange pipe, A...Heating center surface.

Claims (1)

[Scope of utility model registration request] Suction port 2 on one side provided inside casing 3
A heat exchange pipe 5 is provided along the inner circumferential wall of the casing 3 to surround the runner 2, which has a face plate 2b directly connected to the fan motor 1 on the opposite side, and guides the combustion gas burned in the burner 4. The heating center surface A of the heat exchange pipe 5 is connected to the face plate 2b of the runner 2.
A hot air heater characterized in that the air heater is aligned with the air intake or is spaced away from the suction port.