JPH053890U - Infrared drying oven - Google Patents

Abstract

(57) [Summary] [Object] To provide an infrared drying furnace capable of uniformly drying an object to be heated by using both hot air and radiant heat of an infrared heater. [Structure] A hot air outlet 14 is provided on both side partition plates 3 that divide the interior of the oven into a drying chamber 6 and a ventilation oven 7, and each hot air outlet 14 is provided with a large number of small louvers 15 that can be vertically swung. Further, a guide plate 16 which can be vertically swung is provided on the side of the ventilation passage 7 and the angle of each of these guide plates 16 is adjusted for each hot air outlet 14, so that hot air is circulated uniformly without leaving a blind spot in the drying chamber 6. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an infrared drying furnace that dries a heated object such as an automobile urethane bumper by using hot air and radiant heat of an infrared heater in combination.

[0002]

[Prior Art]

 As a conventional infrared drying furnace of this type, as shown in Japanese Utility Model Publication No. 62-37099 of the present applicant, a drying chamber surrounded by a partition plate is formed in the furnace, and the furnace body and the partition plate are formed. There is a ventilating path between the and, and hot air is blown out from the vent hole formed in the partition plate.

However, in this conventional infrared drying furnace, a large number of horizontally long ventilation openings are provided on the partition plate to make the air flow from the blower uniform toward the bottom of the furnace. Tend to be worse than the bottom. As a result, the object to be heated in the upper part is dried mainly by the radiant heat from the infrared heater, so that the surface temperature is rapidly increased, and there is a problem that dry drying occurs in a place not exposed to hot air. In order to solve this problem, the number of objects to be heated placed on the upper part of the furnace has been reduced, but this causes a problem that the operating efficiency of the furnace must be sacrificed.

[0004]

[Problems to be solved by the device]

 The present invention solves the above-mentioned conventional problems, and provides an infrared drying oven capable of uniformly drying objects to be heated placed above and below a drying chamber by equalizing the flow of hot air. It was made.

[0005]

[Means for Solving the Problems]

 The above problem is that the upper partition wall and the side partition plates are continuously provided on the upper and both sides of the furnace body, and a large number of infrared heaters are attached to the inner surface of the furnace to form a drying chamber. An air passage is formed between the plate and the side partition plate, and a large number of hot air outlets formed on the side partition plate are provided with louvers that can be vertically swung, and the air passage side of each hot air outlet is provided. In addition, it can be solved by an infrared drying furnace, which is provided with a vertically movable guide plate.

[0006]

【Example】

 Next, the present invention will be described in detail based on a unitized embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a furnace body composed of a heat insulating material or the like, and side wall plates 3 and 3 are erected from the opposing side wall portions 2 and 2 of the furnace body 1 with a required space between them, and An upper partition plate 5 is provided at a required distance from the upper wall portion 4 of the body 1 to divide the inside of the furnace body 1 into a drying chamber 6 and a ventilation passage 7.

Reference numeral 8 denotes a blower provided in the upper ventilation passage 9 of the ventilation passage 7, and the blower 8 has its suction port facing the hot air suction port 10 provided in the upper partition plate 5. In addition, as shown in FIGS. 2 and 3, around the blower 8, hot air is evenly flowed from the upper ventilation passage 9 to the side ventilation passages 11, 11 communicating downward with both ends thereof. An appropriate number of swingable wind direction plates 13 are provided.

Reference numeral 14 denotes a large number of horizontally long hot air outlets which are vertically arranged on the side partition plates 3 and 3 with a required space therebetween, and each hot air outlet 14 has a small louver that can be vertically swung. 15 is attached. The louver 15 can change the angle of the hot air blown out from the hot air outlet 14 by swinging a large number of blades. Reference numeral 16 denotes an airflow direction plate, which is provided in the ventilation passage 7 behind the louver 15 and can swing vertically, for rectifying hot air.

Reference numeral 17 denotes an infrared heater mounted on the inner surfaces of the side partition plates 3 and 3. The infrared heater 17 increases the watt density per unit area from the upper side to the lower side to prevent the lowering of the temperature in the lower side of the drying chamber 6. The infrared heater 17 is attached as a heater unit 18 to the upper part of each hot air outlet 14, and the heater unit 18 and the hot air outlet 14 constitute one block, and several blocks are provided on both side wall portions 2 of the furnace body 1. 2 are vertically arranged at a required interval. 20 is a thermocouple. It should be noted that if an exhaust port with a damper and an intake port that communicate with the outside of the furnace are attached to the ventilation passage 7, it is possible to cope with the drying of a heated object having a high water content.

[0010]

[Action]

 With this structure, when the infrared heater 14 is energized and the blower 8 is driven, the temperature inside the drying chamber 6 is gradually raised by the radiant heat of the infrared heater 17, and the heated air is blown by the blower 8. It is conventional that the object to be heated is dried by the radiant heat from the infrared heater 17 and the hot air, which is sucked from the suction port 10 and blown into the drying chamber 6 from the hot air discharge port 14 through the ventilation passage 7 to be circulated. Seed infrared dryer.

However, in the present invention, the hot air sucked from the hot air suction port 10 is evenly sent to the side air passages 11, 11 of the air passage 7 by the guide plate 12 and the angle-adjusted wind direction plate 13, and the In addition to being rectified by a vertically swingable guide plate 16 provided on the ventilation passage 7 side of the hot air outlet 14, it is further rectified by a plurality of vertically movable louvers 15 provided at the hot air outlet 14 for drying. It is circulated to the chamber 6.

Therefore, for example, the angle of the guide plate 16 and the louver 15 of the upper hot air outlet 14 is set to 60 degrees downward with respect to the horizontal plane, and the angle of the guide plate 16 of the central hot air outlet 14 is set to the horizontal plane. In contrast, the angle of the upper half of the louver 15 is set to 60 ° downward with respect to the horizontal plane, the angle of the lower half is horizontal, and the angle of the guide plate 16 of the lower hot air outlet 14 is set downward. If the angle of the upper half of the louver 15 is adjusted to be 30 ° upward and the angle of the lower half is horizontal with respect to the horizontal plane, and the angle of the upper half of the louver 15 is adjusted to be horizontal, the hot air outlets 14 The flow velocity of the hot air generated can be made uniform. As a result, the evenly rectified hot air is circulated and supplied into the drying chamber 6 without leaving a blind spot, and by the combined heating with the radiant heat of the infrared ray heater 17, the entire drying chamber is provided with a uniform temperature distribution. Even a placed object to be heated can be dried without unevenness in drying.

Although the drawings of the embodiments show only one unit, it goes without saying that they can be used alone or can be used by connecting an appropriate number.

[0014]

[Effect of the device]

 As described above, the present invention adjusts the angle of the guide plate and the louver for each hot air outlet so that hot air is uniformly supplied without leaving a blind spot in the drying chamber and the hot air and the infrared heater The object to be heated is dried in combination with radiant heat. Therefore, even if the object to be heated is placed at any position, it can be dried accurately without unevenness in drying, and its practical value is extremely great as an infrared drying furnace that solves the conventional problems. Is.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a unit according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially cutaway plan view showing a unit according to an embodiment of the present invention.

FIG. 4 is an enlarged sectional view showing a main part of the embodiment.

[Explanation of symbols]

 1 Furnace body 3 Side partition plate 5 Upper partition plate 6 Drying chamber 7 Ventilation passage 14 Hot air outlet 15 Louver 16 Guide plate 17 Infrared heater

Claims (1)

[Claims for utility model registration] [Claim 1] An upper partition plate and side partition plates are continuously provided in the upper part and both sides of the furnace body, and a large number of infrared heaters are attached to the inner surface to form a drying chamber. In addition, an air passage is formed between the furnace body and the upper partition plate and the side partition plate, and a plurality of hot air outlets formed on the side partition plate are provided with louvers that can be vertically swung, respectively. An infrared drying furnace characterized in that a guide plate that can be vertically swung is also provided on the ventilation passage side of each hot air outlet.