JP2749351B2 - Far infrared heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a far-infrared heater having a far-infrared radiation function.

2. Description of the Related Art A hair dryer disclosed in Japanese Utility Model Unexamined Publication No. 63-18902 is an example of a warmer having a far-infrared radiation function.
As shown in FIG. 4, a far-infrared ray radiator 49 is arranged at a hot air outlet of the main body 1 of the hair dryer, and the far-infrared ray radiator 49 is heated by the warm air sent from the main body 1, and the far-infrared ray is emitted. The radiator 49 emits far infrared rays. However, this is far infrared radiator
49 is only heated to 100-150 ° C, and the energy of far-infrared ray is small.For example, even if the amount of input electric energy required to generate hot air is 1KW,
Only about 0W. For this purpose, a configuration shown in FIG. 5 has been proposed. This is a cylindrical far-infrared heater 4 having a heater and a far-infrared radiator mounted on the outer peripheral surface of a tubular heater base to make the outer surface a far-infrared radiating surface, and a fan rotated by a motor 3. And a reflector 5 for reflecting far-infrared rays emitted from the far-infrared heater 4 in the direction of air blowing, and a far-infrared radiator. In addition to the provision of a dedicated heating element, the far-infrared heater 4 is designed to heat the wind blown out of the blower by the heat applied from the inner surface thereof, but the outer surface, which is a far-infrared radiation surface, is provided by the blower. Because it does not receive the wind, far infrared energy that can be generated is increased. In the figure, reference numeral 6 denotes a suction opening lattice arranged at the suction opening, and 7 denotes a lattice body arranged at the discharge opening.

[Problems to be solved by the invention]

However, this case also has the following problems. That is, since the far-infrared light output from the far-infrared heater 4 is reflected by the reflection plate 5 and irradiated forward, the discharge port must be considerably larger than the suction port. If a grid 7 similar to the one used for the outlet of a normal hair dryer that only blows air is attached to the outlet, hands and combustibles will enter inside due to the large spacing of the grid. Easy to burn and may catch fire. In addition, since the cylindrical infrared heater is used as a wind tunnel of the air blower, the air distribution is largely biased toward the center of the discharge port, and the outer surface has a far infrared radiation surface. The energy distribution does not match the far-infrared energy distribution, so that the temperature distribution at the discharge port has a large variation. The present invention has been made in view of such a point, and a purpose thereof is to prevent burns and ignition due to a hand or a combustible material entering the main body from the discharge port and to equalize the temperature distribution. To provide a far infrared warmer that can be.

[Means for Solving the Problems]

Thus, the present invention provides a cylindrical far-infrared heater whose outer surface is a far-infrared radiating surface, a blower having a fan driven in rotation and having the far-infrared heater as a wind tunnel, and radiation from the far-infrared heater. A reflector that reflects far-infrared light in the direction of air flow, and a large-diameter punching metal that is larger than the suction port opening and that has a fine-grained punching metal at the discharge port opening. It is characterized in that a lattice body having a convex curved surface is provided. [Operation] According to the present invention, since the grid body is formed of fine-punched metal, fingers and combustibles do not enter inside, and the air from the blower diffuses along the grid body. For this purpose, the air distribution approaches the far-infrared energy distribution. [Embodiment] Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. The main body 1 of this far-infrared heater is formed in a frusto-conical shape, and a stand 15 is rotatably connected to the lower surface. Have been. The main body 1 having a front face serving as a discharge port provided with a lattice body 7 and a rear face serving as a suction port provided with a suction port grid 6 has a truncated conical housing 11 and a large-diameter opening of the housing 11. A body is constituted by a front housing 12 arranged at a certain front opening edge, and a blower including a motor 3 and a propeller type fan 2 is installed at the center thereof. The above-mentioned blower, in which the fan 2 is positioned behind the motor 3, is supported by attaching the motor 3 to a motor attachment portion 80 at the center of the support plate 8 which also serves as a rectifying blade. In the figure, reference numeral 36 denotes a heater board assembled in a cross shape, 37 denotes a voltage dividing resistance wire for the motor 3 mounted on the heater board 36, 38 denotes a rectifying bridge, 60 denotes an auxiliary heater wire, 61 denotes a thermal fuse, and 62 denotes a thermocouple. Switch. The far-infrared heater 4 has a heating element mounted on the outer peripheral surface of a cylindrical heater base 41 having a thinner tip side, and a far-infrared radiator is further applied to the outer peripheral surface of the heating element, as in the conventional example. The motor 3 and the heater substrate 36 are located inside the far-infrared heater wire 4. The far-infrared heater 4 serves as a wind tunnel of a blower. Then, along the inner surface of the main body 1, the far-infrared heater 4
A reflection plate 5 is provided to reflect far infrared rays emitted from the air blower toward the air blowing direction of the air blower. The front end of the reflection plate 5 is fixed to the housing 11 with screws 58 at the same time as the lattice body 7. At this time, a gap 9 for heat insulation is formed between the reflection plate 5 and the inner surface of the housing 11. The gap 9 is
The notch formed on the front end side of the reflector 5 communicates with the front space, and the opening provided at the rear end communicates with the space between the reflector 5 and the far infrared heater 4. Is also communicated with the space around the fan 2 through an air passage 83 formed in the fan 2. The cooling air flows through the gap 9 as the fan 2 rotates.
Further, the far-infrared heater 4 is supported by being fixed to a rear end of the reflection plate 5 with a metal fitting 54. Now, regarding the grid body 7 arranged at the discharge port, here, as shown in FIG. 2, a large number of hexagonal punching holes 70 having a hole diameter of about 3 to 5 mm are formed, and the aperture ratio becomes 55% or more. It is made of perforated metal. The lattice body 7 has a portion facing the wind from the air blower drawn in a rearward direction, that is, a smooth convex surface toward the air blower side, and a peripheral portion fixed by the screw 58 has a flat shape. It has been like that. In other words, since the air blower uses the infrared heater 4 as a wind tunnel, its air flow is largely biased toward the center of the discharge port. By making the curved surface bulge to the side, the wind blown from the blower is diffused along the lattice body 7 so that the blown air distribution is closer to the far-infrared energy distribution. Further, the back side R of the lattice body 7 is coated with a coating for preventing rust, and the front side S is subjected to flocky processing. Immediately after the switch is turned off, the temperature of the grid 7 rises to a higher temperature than during operation, for example, to about 150 ° C. due to the residual heat of the far-infrared heater 4. Because of the flocking treatment, the perceived temperature is lowered, and burns can be prevented. Further, even if the heating element wound around the heater base 41 comes off and comes into contact with the reflection plate 5 or the lattice body 7, electric shock can be prevented by the flocking treatment and the insulating effect of the coating. Further, here, the tip of the cross-shaped heater substrate 36 disposed inside the far infrared heater 4 is made to protrude more toward the discharge port than the tip of the heater base 41, and as is apparent from FIG. It is in contact with the rear side R of the body 7, so that even if an impact is applied to the center of the grid 7, the grid 7 is not deformed. And in such a far-infrared heater, the opening ratio of the lattice body 7 arranged at the discharge port and the temperature rise of the main body 1 are as follows.
A relationship as shown in FIG. 3, that is, a relationship in which the temperature of the main body 1 extremely changes with the aperture ratio of 55% as a mirror. This is because when the opening ratio of the grid 7 is 55% or less, the ventilation from the inside of the grid 7 to the outside is not smooth, the hot air is trapped inside, and the air flows from the gap 9 to the fan 2 side. This is because the flow of air is obstructed and cooling is not performed, and the temperature rise is prevented by setting the aperture ratio of the grid 7 to 55% or more.

【The invention's effect】

As described above, in the present invention, since the grid body arranged at the discharge port is formed of fine-punched metal, fingers and combustibles do not enter the inside, thereby causing burns and ignition. Since the grid body has a convex curved surface toward the blower, the grid passed from the blower to the grid through the far-infrared heater functioning as a wind tunnel. The wind is diffused to the outer peripheral side along the lattice, so that the air distribution can be made closer to the far-infrared energy distribution from the far-infrared heater and the reflector, and the temperature and the discharge port by the far-infrared heater The temperature distribution in the opening can be made uniform.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, and FIG.
FIG. 3B is a front view and a side view of the same grid body, FIG. 3 is an explanatory view showing the correlation between the aperture ratio of the grid body and the temperature rise of the main body, FIG. FIG. 5 is a sectional view of another conventional example, in which 1 is a main body, 2 is a fan, 4 is a far-infrared heater, 5 is a reflection plate, and 7 is a lattice.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-134108 (JP, A) JP-A-62-249609 (JP, A) JP-A-1-113078 (JP, A) Jpn. 25783 (JP, U) Japanese Utility Model Showa 64-55803 (JP, U) Japanese Utility Model Application No. 1-149704 (JP, U) Japanese Utility Model Showa 63-166105 (JP, U)

Claims (1)

(57) [Claims] 1. A blower having a cylindrical far-infrared heater having an outer surface as a far-infrared radiating surface, a rotationally driven fan, and using the far-infrared heater as a wind tunnel; And a reflector for reflecting far infrared rays in the direction of the air flow, wherein the discharge port opening that is larger than the suction port opening is made of fine-punched metal and has a blower side. A far-infrared warmer, characterized in that a lattice body having a convex curved surface is provided toward.