JP2000121247A - Hot air device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot air device in which a temperature difference within the hot air device is eliminated and a breakage of coil wire caused by an irregular generated heat is prohibited. SOLUTION: A terminal block having an air blowing suction port 3 and a coil cartridge 1 enclosed by a housing 2 through a coil receptor 5 at a plate surface of a control board 4 are rotatably connected around their axes. There are provided fins 13a, 13b for rotating the coil cartridge 1 with pneumatic pressure flowed to the coil cartridge 1 through the air blowing suction port 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot blast device which supplies air by heating it to a required temperature by an electric heating means.

[0002]

2. Description of the Related Art For example, in a drying room for a painted product, air heated by a hot air device is supplied. A conventional hot air device will be described with reference to FIGS. In FIG. 14, reference numeral 1 denotes a coil cartridge surrounded by a housing 2. This coil cartridge 1 has a base end 1a having a coil receiver 5a.
And is fixedly connected to the terminal board and the plate surface of the control board 4 via the.

[0003] As shown in FIG.
The cathode and anode electrodes 9a and 9b protrude, and the coil receiver 5 has electrode holes 10a and 10b into which the electrodes 9a and 9b fit as shown in FIG. Also,
The terminal block and control board 4 and the coil receiver 5 are provided with air inlets 3 and 11, and the air inlet 3 is connected to a hose 6 connected to a fan (not shown).

Further, a trumpet-shaped nozzle 7 is attached to an opening of the housing 2, and a thermocouple 8 for measuring hot air temperature is arranged in the nozzle 7.

[0005] The hot-air device having such a structure takes air from a blower into the air-intake ports 3 and 11 and contacts the heating coil cartridge 1 to blow out heated air from the nozzle 7.

[0006]

However, in the above-mentioned conventional apparatus, since the air inlets 3 and 11 are at positions offset from the center of the axis of the housing 2, FIG.
As shown by the arrow, the wind does not come into contact with the coil cartridge 1 at the part A separated from the ventilation inlets 3 and 11. As a result, the portion A where the wind does not come into contact has caused the disconnection of the coil due to abnormal heat generation. In order to solve this problem, the structure of the coil cartridge 1 is made into a honeycomb shape and diffused to prevent the bias of the blown air blown out from the nozzle 7, but the bias in the vicinity of the blow suction ports 3 and 11 is not solved.
In order to move the air inlets 3 and 11 to the center of the axis of the housing 2, it is necessary to offset the terminal block and the control board 4, and there is a problem that space saving cannot be maintained.

An object of the present invention is to provide a hot-air device that eliminates a temperature difference inside a hot-air blower and prevents coil disconnection due to abnormal heat generation.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a terminal block having a ventilation inlet and a coil cartridge surrounded by a housing on a plate surface of a control board via a coil receiver. The coil cartridge is provided so as to be rotatable about its axis, and the coil cartridge is provided with fins for rotating the coil cartridge by wind force flowing from the air inlet.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a coil cartridge surrounded by a housing 2. The coil cartridge 1 has a base end 1 a connected to a terminal block and a plate surface of the control board 4 via a coil receiver 5. The terminal block and the control board 4 and the coil receiver 5 are provided with air inlets 3, 1.
1 is open, and a hose 6 connected to a blower (not shown) is connected to the blow suction port 3. Further, a trumpet-shaped nozzle 7 is attached to the opening of the housing 2.
A thermocouple 8 for measuring hot air temperature is arranged in the nozzle 7. The configuration up to this point is the same as that of the conventional device.

However, the present invention is characterized in that the coil cartridge 1 is rotated by wind power flowing from the air inlets 3 and 11. Hereinafter, the specific structure will be described.

As shown in FIGS. 2, 4, 5, 6, and 7, a shaft 12 projects from the base end 1a of the coil cartridge 1 on the axis of the coil cartridge 1. The cathode and anode electrode brushes 14a and 14b are protruded in the vicinity.

On the other hand, as shown in FIGS. 3 and 7, a shaft hole 15 is provided at the center of the coil receiver 5, and a bearing made of a rubber bush for rotatably holding the shaft 12 in the shaft hole 15 is provided. A groove 16 is rotatably provided by a bearing, and the electrode brushes 14a and 14b are fitted therein.
a, 16b are formed in an arc centered on the bearing 17;

It is desirable that the shaft 12 has a spherical tip and the bearing 17 has a spherical hole for holding the spherical tip so that the shaft 12 is hard to come off. The electrode brush 14
FIGS. 8A and 8B show the ends of the grooves 16a and 16b in which
By arranging the spring 18 as exemplified in the above, it is possible to prevent the rotation speed from being lowered by the repulsive action of the spring 18 when the coil cartridge 1 described later is repeatedly rotated forward and backward.

Further, according to the present invention, the coil cartridge 1 rotatably connected to the coil receiver 5 is connected to the air inlets 3, 1.
That is, the rotary operation is performed by the wind force flowing from the unit 1. Therefore, providing the coil cartridge 1 with fins is also an important component. The structure is such that the coil cartridge 1 is placed on the circumference of the base 1a of the coil cartridge 1.
The fins 13a, 13a are provided in a spiral shape inclined in directions different from each other with respect to the axis of the shaft.

Since the present invention has the structure as described above, the wind flowing from the air intakes 3 and 11 is supplied to the fins 13a and 13a.
3b receives the coil cartridge 1 as shown in FIG.
Rotates forward and backward at 180 degrees.

This will be described with reference to FIGS. As shown in FIG. 9 and FIG. 10, the fins 13 located at the air intakes 3 and 11
b, the wind hit on the left side of the fin 13b in FIG. 10 is weak, and the wind hit on the right side is strong. As a result, the coil cartridge 1 rotates clockwise, and stops when the electrode brushes 14a and 14b are rotated by 180 degrees when they slide to the ends of the grooves 16a and 16b.

With this 180-degree rotation, the fins 13a are located at the air inlets 3 and 11 as shown in FIG.
Receive at At this time as well, the hit on the left side of the fin 13a in FIG. 12 is weak, and the hit on the right side is strong.
As a result, the coil cartridge 1 rotates counterclockwise, and stops when the electrode brushes 14a, 14b slide 180 degrees toward the ends of the grooves 16a, 16b.

In this manner, as long as air is blown from the air suction inlets 3 and 11, the coil cartridge 1 repeats forward and reverse rotations,
The air taken in from the ventilation inlets 3 and 11 contacts the coil cartridge 1 evenly and prevents disconnection of the coil due to abnormal heat generation due to uneven temperature.

[0019]

As described above, according to the present invention, since the coil cartridge is rotated by taking in the air to be heated, the amount of air contacting the coil cartridge can be made uniform, and the heating efficiency can be improved. Thus, the size of the coil can be reduced, and disconnection of the coil due to abnormal heat generation due to uneven temperature can be prevented. Further, since the rotation of the coil cartridge utilizes the air flow, there is an advantage that the coil cartridge can be provided at low cost without requiring a dedicated actuator or control device.

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is an explanatory view for connecting a coil cartridge to a coil receiver.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a view taken in the direction of arrow B in FIG. 2;

FIG. 5 is a view taken in the direction of arrow C in FIG. 2;

FIG. 6 is a view taken in the direction of arrow D in FIG. 2;

FIG. 7 is an essential part cross-sectional view showing a connection structure between a coil cartridge and a coil receiver.

FIG. 8 is a diagram showing an end of a groove in which the electrode brush slides.

FIG. 9 is a front view of a base end for explaining the operation of the present invention.

FIG. 10 is a view taken in the direction of arrows EE in FIG. 9;

FIG. 11 is a front view of a base end for explaining the operation of the present invention.

FIG. 12 is a view taken in the direction of arrows FF in FIG. 11;

FIG. 13 is a diagram showing the relationship between the blower and the coil cartridge according to the present invention.

FIG. 14 is a sectional view of a conventional device.

FIG. 15 is an explanatory view for connecting a coil cartridge of a conventional device to a coil receiver.

16 is a view taken in the direction of the arrow G in FIG.

FIG. 17 is a view taken in the direction of arrow H in FIG. 15;

FIG. 18 is a diagram showing a relationship between air blowing and a coil cartridge in a conventional device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coil cartridge 2 housing 3 air inlet 4 terminal block and control board 5 coil receiver 6 hose 7 nozzle 8 thermocouple 11 air inlet 12 shaft 13 a fin 13 b fin 14 a electrode brush 14 b electrode brush 15 shaft hole 16 a groove 16 b groove 17 bearing 18 Spring

Claims (1)

[Claims] 1. A coil cartridge surrounded by a housing via a coil receiver and connected to a terminal block having a ventilation suction port and a plate surface of a control board so as to be rotatable about its axis. A fin for rotating the coil cartridge by wind force flowing from the ventilation inlet.