JPH02161906A - Far infrared fan heater - Google Patents

Abstract

PURPOSE:To prevent the occurrence of an overheated state and to eliminate a thermal deformation and a burn on a user by equipping the device with a ventilation path to connect the space between a far infrared heater and a reflector and a blower and equipping the interval between the reflector and a housing with a void part to communicate wit outdoor air. CONSTITUTION:The front edge of a refractor 5 is fixed to a housing 11 with a discharging port grid 7 and a screw 58, and a gap part 9 is generated between the front edge and the inner surface of the refractor 5. For the front edge part of the large diameter side of the refractor 5, plural chamfers 50 are formed at intervals in a circumferential direction, and the void part 9 communicates with the outdoor air. Plural holes 51 are formed at intervals in the circumferential direction at the rear edge side of the small diameter of the refractor 5 fixed to a heater pedestal 41 with fittings 54. For a support plate 8, which is at the same time a flow straightening vane, the structure of its outer peripheral side is made into a double cylinder structure composed of an inner cylinder 81 and an outer cylinder 82 to deviate from the inner cylinder 81 to a rear side, and a ventilation path 83 having a front edge side to communicate with the void part 9 and the holes 51 and a rear edge side to communicate with the rear edge side outer peripheral space of a fan 2 in the blower is formed between the inner cylinder 81 and the outer cylinder 82 mutually connected with plural ribs 84.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a far-infrared hot air heater equipped with a far-infrared radiation function.

[Conventional technology]

A hair dryer disclosed in Japanese Unexamined Patent Publication No. 18092/1983 is an example of a hot air heater having a far-infrared radiation function. This heats the four far-infrared radiators with hot air sent out by the main body 1 of the hair dryer, and
It is designed to emit far-infrared rays from. However, in this one, the far infrared ray emitter 49 is 100 to 15
Even if it is heated to 0° C., the amount of far-infrared energy is small. For example, even if the input voltage required to generate hot air is IKW, the amount of far-infrared energy will only be about IOW. For this purpose, the configuration shown in FIG. 16 has been proposed. This consists of a cylindrical far-infrared heater 4 whose outer surface is a far-infrared radiating surface by attaching a heating element and a far-infrared radiator to the outer peripheral surface of a cylindrical heater base, and a fan rotationally driven by a motor 3. 2, the far-infrared heater 4 serves as a wind tunnel, and a reflector plate 5 that reflects the far-infrared rays emitted from the far-infrared heater 4 in the blowing direction. In addition, the far-infrared heater 4 is provided with a dedicated heating body, and the outer surface of the far-infrared ray radiation surface is not exposed to the wind from the blower, so that the amount of far-infrared energy that can be generated is large.

[Problem to be solved by the invention]

However, even in this case, there are the following problems. In other words, the reflectance of the reflector decreases due to changes over time, and the energy emitted as heat without being converted into far-infrared energy causes the reflector 5 to be heated, and the main body 1 covering it and the discharge port to be heated. The portion of the outlet grid 7 that is not exposed to the airflow from the blower also becomes high temperature, which may cause thermal deformation or burns to the user. The present invention has been made in view of these points, and its purpose is to provide a far-infrared hot air heater that can reliably prevent overheating.

[Means to solve the problem]

Therefore, the present invention provides a cylindrical far-infrared heater whose outer surface is a far-infrared ray emitting surface, a blower device that is equipped with a rotationally driven fan and uses the far-infrared heater as a wind tunnel, and The far-infrared air heater is equipped with a reflector that reflects far-infrared rays in the direction of air flow, and the far-infrared heater is equipped with an air passage that connects the space between the far-infrared heater and the reflector and the air blower. In particular, it has the first characteristic,
It also has a second feature in that it includes a gap communicating with the outside air between the reflector and the housing surrounding the reflector, as well as a ventilation path connecting the gap and the blower, Furthermore, the space between the far infrared heater and the reflector,
A ventilation path connecting the air blower and the air blower, a gap communicating with the outside air between the reflector and the housing surrounding the reflector, and a ventilation path connecting the gap and the blower. It has a third characteristic. [Function] According to the present invention, the hot air that accumulates in the upper part of the space between the far-infrared heater and the reflector is discharged by the air blower because this space and the air blower communicate with each other through the air passage. The reflector plate, which is heated by the absorption of hot air and far infrared rays, is cooled by an air flow passing through a gap located behind it and connected to a blower through a ventilation section. [Example 7] The present invention will be described in detail below based on the illustrated example.The main body 1 of this far-infrared hot air heater is formed into a truncated conical shape, as shown in FIGS. 2 to 5. A grip 14 equipped with a switch 17, 18 is provided from the lower side via a connecting portion 13, and the rear end of a stand 15 is rotatably connected to the rear side of the lower surface by a holder 16. In the figure, 19 is a light emitting element for displaying the operating state, and 20 is a connecting part 13.
This is the power cord led out from the back of the The main body 1 has a discharge port with a discharge port grid 7 arranged on the front side and a suction port with a suction port grid 6 arranged on the back side.
The body is composed of a conical housing 11 and a front housing 12 arranged at the edge of the large-diameter front opening of the housing 11. A motor 3 and a propeller are located in the center of the housing. A blower device consisting of a type fan 2 is installed. The above-mentioned blower device in which the fan 2 is located behind the motor 3 is supported by attaching the motor 3 to a motor attachment part 80 in the center of a support plate 8 which also serves as a rectifying blade. 36 is a heater board assembled in a cross shape, 37 is a resistance wire attached to the heater board 36, and 38 is a rectifier bridge. In the far-infrared heater 4, as shown in FIG. 8, a heating body 42 is attached to the outer circumferential surface of a cylindrical heater base 41 with a tapered tip, and this heating body 42 is similar to the conventional example. A far-infrared radiator is further coated on the outer peripheral surface of the heater 4 and fixed by baking or thermal spraying, and the motor 3 and the heating board 36 are located inside the far-infrared heater 4. . The far-infrared heater 4 serves as a wind tunnel of the blower. A reflector plate 5 is installed along the inner surface of the main body 1 to reflect far-infrared rays emitted from the far-infrared heater 4 in the direction of the air blowing device. As shown in FIGS. 7 and 10, the front end of the reflector plate 5 is fixed to the housing 11 with screws 58 at the same time as the outlet grid 7, and at this time, a gap 9 is created between the reflector plate 5 and the inner surface of the housing 11. However, as shown in FIGS. 7 and 9, at the front end of the large diameter side of the reflecting plate 5,
A plurality of notches 50 are formed at intervals in the circumferential direction, and the void portion 9 communicates with the outside air through these notches 50. Also, a metal fitting 5 is attached to the heater base 40.
As shown in FIGS. 7 and 8, a plurality of holes 51 are formed at intervals in the circumferential direction on the small-diameter rear end side of the reflector 5 fixed by the reflector 5. As shown in FIGS. Reference numeral 25 in FIG. 11 is an undercut engagement portion that connects the housing 11 and the front housing 12. As shown in FIG. The support plate 8 has an inner cylinder 81 on its outer circumferential side, and an outer cylinder 8 located at a position deviated from the inner cylinder 81 to the rear side.
It has a double cylinder structure consisting of 2 and 6 and 8.
As shown in the figure, between an inner cylinder 81 and an outer cylinder 82 which are connected to each other by a plurality of ribs 84, the front end side communicates with the cavity 9 and the hole 51, and the rear end side communicates with the air gap 9 and the hole 51. A ventilation path 83 is formed which communicates with the outer circumferential space on the rear end side. Incidentally, the outer peripheral edge of the suction port grid 6 is fixed between the inner surface of the rear end of the housing 11 and the outer surface of the outer cylinder 82. However, in this far-infrared hot air heater, when the blower is operated, air between the far-infrared heater 4 and the reflector 5 passes through the hole 51 formed in the reflector 5 and the ventilation path 83 to the fan. It is sucked in from the side of 2 and sent out to the discharge port. Therefore, temperature rise in the space between the far-infrared heater 4 and the reflection plate 5, especially in the upper space where hot air gathers due to convection, is prevented. At the same time, the outside air drawn into the fan 2 from the cutout 50 at the front end of the reflector 5 through the gap and the ventilation path 83 cools the reflector 5. Therefore, the reflector, main body 1, discharge port grid 7, etc. do not overheat, and the temperature of each part is kept uniform. As shown in FIG. 12, if the rear end of the housing 11 of the main body 1 is extended rearward and an extension tube 26 is provided, the propeller type fan 2 has a characteristic that the amount of air sucked from the suction port side is Since the amount of air sucked in from the outer circumferential side, that is, from the ventilation passage 83 side increases, overheating can be prevented even more reliably. As shown in FIG. 13, when extending the inner cylinder 81 rearward to the same position as the outer cylinder 82, it is sufficient to make a hole 85 in the inner cylinder 81. Further, as shown in FIG. 14, the rear end of the inner cylinder 81 is bent inward, and the rear end of the outer cylinder 82 is bent inward in an L-shape, and the rear end of the outer cylinder 82 is bent inward to form a position behind the fan 2. The air passage 86 connected to the ventilation passage 83 may be opened at that point.

【Effect of the invention】

As described above, in the present invention, the hot air that accumulates in the upper part of the space between the far-infrared heater and the reflector is discharged by the air blower because this space and the air blower communicate with each other through the air passage. Moreover, the reflector plate, which is heated by the absorption of hot air and far infrared rays, is cooled by the outside air that passes through the gap located behind it and connected to the blower through the ventilation section. However, overheating can be prevented, and the risk of thermal deformation and burns to the user can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side view of the same, and FIG. 4 is a rear view of the same.
Figure 5 is a bottom view of the same as the above, Figure 6 is a rear view of the same as the above with the suction port grid removed, Figure 7 is a front view of the same as the above with the discharge port grid removed, and Figure 8 is an enlarged view of the same as the above. Longitudinal sectional view, No. 9
11 are a sectional view taken along the line X-X, a sectional view Z-Z, and a sectional view taken along Y-Y in FIG. 7, FIG. 12 is a sectional view of another embodiment, and FIG. 13 is a sectional view of another embodiment. 14 is a sectional view of another embodiment, FIG. 15 is a sectional view of a conventional example, and FIG. 16 is a sectional view of another conventional example, where 1 is a main body and 2 is a sectional view of another conventional example. A fan, 4 a far-infrared heater, and 5 a reflector. Agent Patent Attorney Ishi 1) Chief 74 Figure 5 Figure 12 ■ Figure 13 Figure 14 ■ Figure 15

Claims (3)

[Claims] (1) A cylindrical far-infrared heater whose outer surface is a far-infrared ray emitting surface, a blower equipped with a rotationally driven fan and using the far-infrared heater as a wind tunnel, and far-infrared rays emitted from the far-infrared heater A far-infrared hot air heater equipped with a reflector that reflects light in the direction of air blowing, characterized by comprising an air passage that connects the space between the far-infrared heater and the reflector and the blower. Far infrared hot air heater. (2) A cylindrical far-infrared heater whose outer surface is a far-infrared ray emitting surface, a blower device including a rotationally driven fan and using the far-infrared heater as a wind tunnel, and far-infrared rays emitted from the far-infrared heater In a far-infrared hot air heater, a far-infrared hot air heater is equipped with a reflector that reflects the air in the direction of air blowing, and a gap that communicates with the outside air is provided between the reflector and a housing that surrounds the reflector, and the gap and the blower are connected to each other. A far-infrared hot air heater characterized by being equipped with a ventilation path that connects the air. (3) A cylindrical far-infrared heater whose outer surface is a far-infrared ray emitting surface, a blower device including a rotationally driven fan and using the far-infrared heater as a wind tunnel, and far-infrared rays emitted from the far-infrared heater A far-infrared hot air heater comprising a reflector that reflects the air in the direction of air blowing, the far-infrared hot air heater comprising the air passage according to claim 1 and the void and air passage according to claim 2. Infrared hot air heater.