JPS6227762Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radiant electric heater, and more particularly to a radiant electric heater equipped with a reflector having a parabolic cross section.

Conventionally, this type of radiant electric heater generally has a heater body A having a rectangular box shape, as shown in FIGS. 4 and 5, and a reflector plate a attached to the heater body A.
In this case, a plate body simply bent so that its cross-sectional shape is semicircular or parabolic is used, and the heating body b provided in front of the reflector plate a is rod-shaped. Therefore, the radiant heat from the heating element B is widely diffused in the vertical direction as shown in FIG. In other words, the radiant heat cannot be concentrated, and if the heater is a little far away from the electric heater, sufficient heating cannot be achieved.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to reflect the radiant heat from the heating element well without being diffusely reflected in front of the reflector plate provided on the heater body, and to centralize the radiant heat. The aim is to make this possible, thereby increasing the effective forward reach of heat transfer.

Therefore, the configuration of the present invention is such that the heater main body 3 has a protrusion 31a facing forward in the central part, and the radial cross-sectional shape from the protrusion 31a to the peripheral edge is a parabolic shape that opens forward. An annular reflecting plate 31 is provided, and an axis of symmetry 30 in the cross-sectional shape of the parabola is provided in front of the annular paraboloid of the reflection line 31 in the heater main body 3.
An annular heating body 32 is provided on a virtual circle formed by a set of It is designed to reflect the radiant heat from 32 well without diffusely reflecting it, and to concentrate this radiant heat.

Embodiments of the present invention will be described below based on the drawings.

In Fig. 1, 1 is a base, and this base 1
Operation keys 1a such as ON and OFF switches are provided in the front part of the apparatus, and a support 2 is provided in the center thereof, and a reflector 31 and a heating element 32, which will be described later, are provided on the upper part of the support 2. The heater main body 3 is then attached.

In the embodiment shown in FIGS. 1 and 2, the reflecting plate 31 is annular, has a circular front shape, and has a protrusion 31a facing forward in the center, and The radial cross-sectional shape from the protrusion 31a to the peripheral edge is formed into a parabolic shape that opens toward the front, as shown in FIG.

Further, the heating body 32 is formed in an annular shape, and the heating body 32 is placed in front of the reflection plate 31 on a virtual circle formed by a set of symmetry axes 35 in the cross-sectional shape of a parabola. They are arranged concentrically around the central protrusion 31a of No. 31. Further, the heater main body 3 has a hemispherical shape with an open front and a circular front, and the peripheral edge of the reflector 31 is fixed to the front edge of the heater main body 3, and the heater main body 3 and the reflector A transformer 4 and a support body 34 for the heating body 32 are installed in a space 33 formed between the transformer 4 and the heating body 31, and the transformer 4 and the heating body 32 are electrically connected to each other. The heating body 32 is supported by the support body 34. In addition, in the drawing, 5 is a power supply connection cord.

In the embodiment configured as described above, the radiant heat from the heating body 32 is transmitted via the reflecting plate 31 from a paraboloid on one side in the radial direction of the reflecting plate 31 sandwiching the protrusion 31a. The reflection and the reflection from the paraboloid on the other side in the radial direction are reflected by the projection 31a.
overlaps in an annular shape in front of the annular heating body 31 and radiates as shown in FIG. 2, and the shaded region S in FIG.
This is the range where polymerization occurs intensively.

Therefore, since the radiant heat is strong in the S area on the front side of the heater body 3 and the diffusion width is small, the radiant heat is sufficiently effective over a considerable distance in the front side of the heater body 3. It is reached.

Further, in the embodiment shown in FIG. 3, the transformer 4 is provided outside the heater main body 3, and a fan motor 6 is provided in front of the transformer 4, and is driven by the fan motor 6. A small fan 61 is installed inside the space 33 between the reflector plate 31 and the heater main body 3, while a plurality of drive suction ports 35 are provided in the vicinity of the fan motor 6 in the heater main body 3. In addition, an air outlet 31b is provided at the front center of the central protrusion 31a of the reflecting plate 31. Further, in FIG. 3, reference numeral 7 denotes a swinging mechanism interposed between the upper part of the support column 2 and the fan motor 6 and transformer 4.

According to the embodiment configured as shown in FIG.
The air blown by the fan 61 is guided and sent out by the central protrusion 31a of the reflection plate 31, so that a smooth air flow is formed and the air is concentrated in front of the reflection plate 31 without being diffused in all directions. They are sent out. Furthermore, since this air blowing area almost coincides with the area S that is intensively heated by the heating element 32, sufficiently heated hot air can be sent out.

Furthermore, by providing the swinging mechanism 7,
Even when targeting a large number of people, concentrated heat radiation can be performed effectively and equally.

As is clear from the above description, the radiation type electric heater of the present invention has a protrusion 31a facing forward in the central part of the heater body 3, and the protrusion 31a
An annular reflecting plate 31 having a parabolic cross-sectional shape in the radial direction extending from the radial direction to the peripheral edge thereof is provided, and in front of the annular paraboloid of the reflecting plate 31 in the heater main body 3, and , since the annular heating body 32 is provided on a virtual circle formed by a set of symmetry axes 30 in a cross-sectional shape depicting a parabola, the annular heating body 32
The radiant heat emitted from the reflector plate 31 can be well reflected by concentrating it annularly in the front without diffused reflection by the wide-range annular paraboloid formed from the central protrusion 31a to the periphery of the reflecting plate 31. Therefore, the effective reach of the radiant heat reflected by the reflection plate 31 of the annular heating body 32 can be increased.

In particular, since the forward-facing protrusion 31a at the center of the reflecting plate 31 also forms a parabolic reflecting surface, in other words, the reflecting surface forms a donut shape with the protrusion 31a in between. Since the reflective surface is also formed in the protrusion 31a, the radiant heat of the annular heating body 32 is diffusely reflected in front of the center of the reflection plate 31, that is, in front of the protrusion 31a. The light is concentrated in an annular shape and can be reflected well.

Moreover, the protruding portion 3 of the reflecting plate 31
Reflection from a paraboloid on one side in the radial direction across 1a,
Since the reflection from the paraboloid on the other side in the radial direction can be annularly concentrated in front of the protrusion 31a and superposed, the radiant heat in front of the protrusion 31a can be made strong. is formed, and the protrusion 31a
This allows the radiant heat reflected by the reflecting plate 31 of the heating body 32 to reach a sufficiently far distance in front of the heating body 32.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a partial vertical cross-sectional side view, FIG. 3 is a partial vertical cross-sectional side view showing another embodiment, FIG. 4 is a perspective view showing a conventional example, and FIG. 5 is a partial vertical cross-section of the heater shown in FIG. 4. FIG. 3... Heater main body, 31... Annular reflector, 32
...Annular heating body, 31a...Protrusion, 30...Axis of symmetry.

Claims (1)

[Scope of utility model registration request] The heater body 3 has a protrusion 3 facing forward in the center.
1a and whose radial cross-sectional shape from the protruding portion 31a to the peripheral edge is a parabolic shape opening forward, and the reflecting plate 31 in the heater main body 3 is provided. A radiation-type electric heater characterized in that an annular heating body 32 is provided in front of an annular paraboloid and on a virtual circle formed by a set of symmetry axes 30 in a cross-sectional shape of a parabola.