JPH0334600Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a hot air heater that exchanges heat between combustion heat generated by combustion of fuel such as gas or oil and indoor air using a heat exchanger. .

[Conventional technology]

Figures 7 and 8 show conventional examples of this kind of hot air heater. In the figures, 1 is an outer box, 2 is a blower supported at the upper part of the outer box 1, and 3 is a blower that drives the blower 2. An electric motor, 4 is a casing that covers the outer periphery of the blower 2, 4a is an inlet of the casing 4, 4b is an outlet of the casing 4, 5 is disposed below the outlet 4b of the casing 4, and there is gas, oil, etc. inside. A heat generating system consisting of a burner 5a that burns fuel, a plurality of heat absorption fins 5b attached to the inner circumference, a plurality of heat radiation fins 5c attached to the outer circumference, and an exhaust pipe 5d that discharges exhaust gas to the outside. The exchanger 6 is an outer box that opens to the indoor side of the outer box 1 at the bottom of the heat exchanger 5, and a discharge grill 7 that discharges warm air by heat exchange to the indoor side, and the upper part of the outer box houses the electric motor 3 that drives the blower 2. The electric motor 3
8 is a filter that is attached to the suction port 4a of the blower casing 4 and removes dust, 9 is a partition wall that separates the indoor and outdoor areas, and 10 is an outdoor control box. These are the legs that support the lower part of the box 1.

With the above structure, the combustion heat generated by burning fuel in the burner 5a and the indoor air sucked in by the blower 1 through the filter 8 are exchanged via the heat absorption fins 5b and the heat radiation fins 5c, and the heat is While passing through the side of the exchanger 5, it is heated and becomes warm air,
The air is blown into the room from the discharge grill 6 and heats the room.

[Problems that the idea is trying to solve]

The conventional hot air heater configured as above is
When adjusting the indoor temperature, the amount of combustion heat generated in the heat exchanger is adjusted, and the rotational speed of the blower drive electric motor is controlled accordingly to adjust the amount of air blown, thereby adjusting the indoor temperature to a higher temperature side. There is no particular problem if you adjust it to a low temperature side, but if you adjust it to a low temperature side, the air pressure will decrease due to a decrease in the amount of air supplied from the blower, and the temperature distribution in the room will be poor because the speed of hot air discharged from the discharge grill is low. There was a problem.

This idea was made to solve the above problems, and even if the amount of combustion heat generated in the heat exchanger is adjusted, there is no need to adjust the rotation speed of the blower drive motor, and the indoor temperature can be adjusted. It is an object of the present invention to provide a hot air heater that can discharge hot air from a discharge grill at a high speed even when the temperature is adjusted to a low temperature side, and can provide a good indoor temperature distribution.

[Means to solve the problem]

The hot air heater according to this invention has a torsion coil spring made of a shape memory alloy that connects a vertical support plate and a damper in a hinge-like manner at the bottom of the outer box, and the damper opens and closes a part of the discharge grill. This is how it was done.

[Effect]

In this device, when the amount of combustion heat is large, the damper is at right angles to the support plate, and the discharge grille is fully opened. When the amount of combustion heat is small, the damper is linear with respect to the support plate due to the spring pressure, and the discharge is discharged. Part of the grill will be closed.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 6. In the figure, the same reference numerals as in FIGS. 7 and 8 indicate the same or corresponding parts, 11 is a support plate fixed vertically to the bottom of the outer box, 12 is a grill 6
11a and 12a are support plates 11 and insulating plates 13 that cover the surfaces of the damper 12.
are fixed at their ends to insulating plates 11a and 12a, and are connected to support plate 11 and damper 1 via insulating plates 11a and 12a.
The torsion coil spring 13 is made of a shape memory alloy that memorizes its shape so that the damper 12 becomes perpendicular to the support plate 11 when the temperature reaches a predetermined temperature or higher due to energization. A tension coil spring 14 is installed between the damper 12 and the intermediate grille 6a, and operates so that the damper 12 is linear with respect to the support plate 11 when the torsion coil spring 13 is de-energized.
is a torsion coil spring 13 on the insulating plates 11a and 12a.
16 is a torsion coil spring 13
This is the lead wire that conducts electricity.

With the above structure, when adjusting the indoor temperature to a high temperature side, the amount of combustion heat generated in the heat exchanger 5 is large, so it is necessary to increase the amount of air blown by the blower 2, but the torsion coil spring 13 is energized. By setting the temperature above a predetermined temperature, the damper 12 becomes perpendicular to the support plate 11 as shown in FIGS. 3 and 4, and the grille 6 is fully opened, so that the required air volume is secured. Furthermore, when adjusting the indoor temperature to a lower temperature side, it is necessary to reduce the amount of combustion heat generated in the heat exchanger 5, but by stopping the energization to the torsion coil spring 13, as shown in FIGS. 5 and 6. As shown, the support plate 11 and the damper 12 form a straight line and partially close the discharge grille 6, so that the blower 2
Even if the amount of air supplied from the grill 6 is the same, the speed of the air passing through the sides of the heat exchanger 5 increases, preventing a decrease in the speed of hot air discharged from the grill 6, and improving the temperature distribution in the room.

[Effect of idea]

As explained above, this device is configured so that when the amount of combustion heat is large and the airflow from the blower is large, the discharge grille is opened, and when the amount of combustion is small, a part of the discharge grille is closed. This has the effect of increasing the speed of the air discharged from the grill without controlling the air volume, and improving the temperature distribution in the room.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of this invention,
Fig. 1 is a longitudinal sectional view, Fig. 2 is a - sectional view of Fig. 1, Figs. 3 and 4 are front and side views of main parts to explain the operation when the amount of combustion heat is large, and Fig. 5
Figure 6 is a front view and side view of the main parts to explain the operation when the amount of combustion heat is small, Figures 7 and 8 show a conventional example, Figure 7 is a longitudinal sectional view, and Figure 8 is a It is a - sectional view of FIG. 7. In the figures, the same reference numerals indicate the same or equivalent parts, 1 is the outer box, 2 is the blower, 5 is the heat exchanger, 5 is the
c is a radiation fin, 6 is a discharge grille, 11 is a support plate, 12 is a damper, and 13 is a torsion coil spring.

Claims (1)

[Scope of utility model registration request] A blower that is housed in the upper part of the outer box and sucks indoor air and blows it downward, and a heat exchanger that exchanges heat between the combustion heat generated by combustion of fuel and the indoor air sent from the blower. , a hot air heater comprising a discharge grill for discharging hot air into a room through heat exchange, and a control device for adjusting the amount of combustion heat of the heat exchanger, wherein the control is performed according to the magnitude of the amount of combustion heat of the heat exchanger. It is composed of a shape memory alloy that is heated and deformed by the device, and when the amount of combustion heat generated within the heat exchanger is small, a part of the above-mentioned discharge grill is closed, and when the amount of combustion heat generated within the heat exchanger is large. is a hot air heater characterized by being provided with a damper for releasing the above-mentioned closure.