JPH0454473B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gas combustion type dryer used in general households, and more particularly to a device for preventing the body surface from heating up due to high temperature combustion gas.

Conventional Structure and Problems Conventionally, this type of gas dryer has a structure as shown in FIG. That is, 1 is a main body of the device forming an outer frame, and 2 is a rotating drum provided within the main body 1 so as to be rotatable around a horizontal axis. The rotating drum 2 is supported at the front by a drum support plate 3 having an outer diameter that can slide on a flange provided at the front of the drum 2,
The rear portion is supported by a bearing 6 provided approximately at the center of a fan case 5 having a fan 4 therein. A motor 7 drives the drum 2 and the fan 4 by transmitting their rotation through belts 8 and 9, respectively. 10 is a burner unit equipped with a gas valve, a governor, a nozzle, etc., and 11 is a burner section that actually performs combustion. A combustion tube 12 having an opening at one end is provided above the burner section 11 to cover the combustion flame, and the other end of the combustion tube 12 is bent into a U-shape and provided on the drum support plate 3. It fits into the air intake hole 13. In order to save space in the dryer as a whole, the combustion tube 12 is placed very close to the front of the main body 1.
In addition, as shown in Fig. 2, it is located close to the side of the device body 1, and the radiant heat of the high temperature (approximately 300°C) combustion gas passing through the combustion tube 12 damages the front and side surfaces of the device body. To prevent temperature rise, a material with a heat insulating effect such as glass fiber or a material that reflects radiant heat, such as an aluminum plate, is tightly attached to parts A and B on the inside of the equipment body 1, such as a flat aluminum plate. A common configuration was to glue the parts together. However, with this structure of the heat insulator or reflector, when the amount of gas burned in the burner section 11 is increased in order to shorten the drying time, the front surface of the device body 1 and the There was a problem in that the sides became hot and dangerous to touch. On the other hand, there was a problem in that ensuring a large gap between parts A and B in order to lower the temperature of these parts goes against space-saving design.

Purpose of the Invention The present invention solves these conventional problems and provides a gas dryer that can burn more gas with a compact component configuration without creating a large gap between the combustion tube and the main body of the device. be.

Structure of the Invention The gas dryer of the present invention includes a rotating drum that is rotatably arranged around a horizontal axis within the device body, and a front opening edge of the rotating drum that is slidably supported on the outer periphery. A circular drum support plate with an intake hole formed in a part for introducing hot air, a gas burner section, a combustion tube that guides the combustion gas from the cuzzle burner section to the intake hole, and the front inner surface of the combustion tube and the main body of the device. The heat shield plate is attached to the inner surface of the front part of the main body of the device via stepped parts formed at multiple locations around the device, and has a large number of protrusions on the front and back sides. Further, when the height of the protrusion facing the inner surface of the front part of the device main body is t ₂ and the height of the stepped part is t ₁ , t ₁ >t ₂ is set.

According to this configuration, heat from the combustion tube is shielded by the heat shield plate and the air layer existing between the front inner surface of the device body and the heat shield plate. In particular, the protrusions usually do not touch the inner surface of the front part of the device body, thereby preventing heat transfer by conduction as much as possible.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figures 3 and 4, 21
is a heat shielding plate made of a thin plate of aluminum or the like, and the cross section is provided with hemispherical or substantially conical protrusions 22 on both sides as shown in FIG.

Reference numeral 23 denotes a stepped portion used when attaching the heat shield plate 21, and the relationship t ₁ >t ₂ is established. The state in which the heat shielding plate 21 is installed inside the device main body 1 will be explained with reference to FIG. The combustion tube 12 is mounted at a distance such that it does not touch the protrusion 22 of the heat shield plate 21. Also, 2 is a drum,
3 is a drum front support plate.

To explain the operation in the above configuration, the high temperature combustion gas combusted in the burner section, as shown by the arrow,
The intake hole 3 of the drum support plate 3 passes through the combustion tube 12
Enter drum 2 from a. At this time, the combustion tube 12 becomes high temperature (approximately 300 degrees Celsius) due to the combustion gas, and the C surface of the heat shield plate 21 receives radiated heat from the combustion tube 12 and its temperature rises. There are several point contacts, and heat transfer due to contact between solid bodies is reduced, and at the same time, the heat shield plate 21
The heat from the combustion tube 12 is very difficult to be conducted to the inner surface of the device body 1 due to the heat insulation provided by the air layer between the combustion tube 12 and the device body 1. Further, the protrusions on the C surface of the heat shielding plate 21 are for making point contact even if the combustion tube 12 comes into contact with the C surface due to some kind of vibration or the like.

In addition, in the above embodiment, the shape of the protrusion provided on the heat shield plate was shown as a hemispherical or conical shape, but the cross-sectional shape may be any shape. It is sufficient if an air layer can be secured between the main bodies.

Effects of the Invention As is clear from the above embodiments, the gas dryer of the present invention is particularly advantageous in that the heat shield plate is attached to the inner surface of the front part of the main body of the device via stepped portions formed at multiple locations around the heat shield plate. , a large number of protrusions are provided on the front and back sides, and when the height of the protrusion facing the inner surface of the front part of the device body is t ₂ and the height of the stepped part is t ₁ , t ₁ >
By setting the temperature to t ₂ , the heat radiation from the hot combustion gas ventilation path to the equipment body can be reduced by the heat shielding effect of the heat shield plate and the insulation effect by the air layer between the heat shield plate and the heat shield plate. This makes it possible to store a high-calorie burner in a compact space, thereby providing a space-saving gas dryer with a short drying time. In addition, since the protrusions of the heat shield plate are not normally in contact with the main body of the device, the heat insulation effect is further enhanced, and even if they do come into contact due to external force, the contact area will be small and there will be almost no heat conduction. Become.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional gas dryer;
The figure is a partial sectional view of the same, Figure 3a is a sectional view of a heat shield plate of a gas dryer showing an embodiment of the present invention, and Figure 3b
4 is a perspective view of the thermal shielding plate, and FIG. 4 is an enlarged sectional view of the main part of the gas dryer. DESCRIPTION OF SYMBOLS 1... Equipment body, 2... Drum, 3... Drum support plate, 12... Combustion tube, 21... Heat shielding plate, 2
2... Protrusion.

Claims (1)

[Claims] 1 A rotating drum that is rotatably arranged around a horizontal axis in the main body of the device, and the front opening edge of this rotating drum is slidably supported on the outer periphery, and a part has an intake hole for introducing hot air. A circular drum support plate formed, a gas burner section, a combustion tube that guides combustion gas from the cusp burner section to the intake hole, and a heat shield plate interposed between the combustion tube and the inner surface of the front part of the main body of the device. This heat shield plate is attached to the front inner surface of the device main body via stepped parts formed at multiple locations around the device body, and has a large number of protrusions on the front and back, and the front inner surface side of the device main body is The height of the facing protrusion is t ₂ ,
A gas dryer set so that t ₁ > t ₂ when the height of the stepped part is t ₁ .