JPS641750Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heating furnace, and particularly to its cooling structure.

Conventional heating furnaces include those shown in FIGS. 1 to 3. In each figure, reference numeral 1 denotes a heating furnace machine case, to which a furnace tube 4 is fixed via support plates 2 and 3, and a plurality of halogen A light bulb 6 is fixed to support plates 2 and 3. Furthermore, a heat insulator 7 and a reflector 8 are provided in this order to surround these halogen light bulbs 6, and a cooling fan 9 is provided on the side of these. 1 is provided with an outlet 10. The terminals 6a of the halogen light bulbs 6 on the upper part of the support plate 2 are
The heat insulating material 7 between the support plates 2 and 3, the reflective plate 8, and the terminal 6b of the halogen light bulb 6 located below the support plate 3 are cooled.

By the way, the wind from cooling fan 9 is
As described in column 3, lines 10 to 18 on page 2 of Publication No. 9849, the flow spirals in the same direction as the rotation direction of cooling fan 9, resulting in uneven cooling. That is, in FIG.
Assuming that is rotating counterclockwise, the wind will be stronger in the space above support plate 2 at part P than in part Q because of the presence of support plates 2 and 3. In the space, the wind hits the R part more strongly than the S part, and in the space under the support plate 3, the wind hits the R part more strongly than the S part.
The wind hits the part marked stronger than the part marked U. As a result, in the space above the support plate 2 in FIG. In the lower space, the terminal 6b of the halogen bulb 6 on the back side of the drawing is cooled better than the terminal 6b of the halogen bulb 6 on the front side of the drawing, and the heat insulating material 7 and reflective plate 8 in the space between the support plates 2 and 3 cool down. The disadvantage is that on the front side of the drawing, the lower part is cooled better than the upper part, and on the back side of the drawing, the upper part is cooled better than the lower part, causing uneven cooling and making it impossible to obtain a uniform and large cooling effect. It was hot. Further, since the furnace tube 4 is located between the halogen bulb 6 facing the discharge port 10 and the cooling fan 9, the terminals 6a and 6b of the halogen bulb 6 are
Another drawback was that it was not cooled sufficiently.

The purpose of this invention is to provide a heating furnace that solves the above-mentioned drawbacks, and for this purpose, a cooling air rectifying plate is installed inside the heating furnace housing to eliminate uneven cooling.
The cooling effect is uniform and large.

This invention will be explained below based on one embodiment shown in FIGS. 4 and 5. In FIGS. 4 and 5, parts equivalent to those of the conventional device shown in FIGS. 1 to 3 are given the same reference numerals, and their explanations will be omitted. In order to simplify the drawing, the machine casing 1 and the cooling fan 9 are omitted in FIG. is also omitted.

Cooling air baffle plates 11a, 11b,
11c is provided. The cooling air baffle plate 11a is provided vertically between the upper plate of the machine casing and the support plate 2,
It extends from the end of the support plate 2 on the side where the cooling fan is provided, that is, the right end, along the rear edge of the support plate 2 to the vicinity of the left end of the support plate 2, and the left end of the current plate 11a. The portion is curved toward the furnace tube 4 side. The cooling air baffle plate 11b is provided between the support plates 2 and 3, and the cooling air baffle plate 11c is provided between the support plate 3 and the lower plate of the machine casing, in the same manner as the cooling air buff plate 11a. These cooling air baffle plates 11a, 11
b and 11c may be formed separately or integrally.

Cooling air baffle plates 12a, 12b,
12c is provided. The cooling air baffle plate 12a is provided vertically between the upper plate of the machine casing and the support plate 2,
It extends from the right end of the support plate 2 where the cooling fan is provided along the front edge of the support plate 2, and is bent from the middle to form an arc concentric with the furnace tube 4, and its left end is It has reached the left end of the rear edge of the support plate 2. The cooling air baffle plate 12b is provided between the support plates 2 and 3, and the cooling air baffle plate 12c is provided between the support plate 3 and the lower plate of the machine casing, in the same manner as the cooling air buff plate 12a. These cooling air current plates 12
a, 12b, 12c are also cooling air baffle plates 11a, 11
It may be formed integrally like b and 11c, or
Each may be formed separately. A discharge port 13 is defined between the left end portions of these cooling air baffle plates 11a, 11b, 11c and the left end portions of the cooling air baffle plates 12a, 12b, 12c.

On the upper surface of the right end of the support plate 2, a rectangular cooling air baffle plate 14 is located at a position biased toward the front edge, that is, l1<
It is provided at a position that divides the right end portion of the support plate 2 into a distance l2, l1, l2, so as to form an acute angle α1 with the right end portion, vertically and facing toward the cooling air baffle plate 11a. Also, on the lower surface of the right end of the support plate 3, a rectangular cooling air baffle plate 15 is located at a position biased toward the rear edge, that is, at a distance l3, l4 such that l3>l4, the support plate 3
It is provided vertically at a position dividing the right end of the cooling air baffle plate 12a so as to form an acute angle α2 with the right end.

A cooling air baffle plate 1 is installed on the right end side between the support plates 2 and 3.
6 is biased toward the support plate 3 side, that is, l5>l
It extends halfway from the cooling air baffle plate 12b toward the cooling air baffle plate 11b at a position that divides the distance between the support plates 2 and 3 into a distance l5, l6 of 6, and
Moreover, it is provided so as to face the support plate 2 side, that is, to form an acute angle β1 upward. Also, on the right end side between the support plates 2 and 3, the cooling air baffle plate 17 is located at a position biased toward the support plate 2 side, that is, at a position that divides the distance between the support plates 2 and 3 into distances l7 and l8 where l7<l8. , the cooling air current plate 1 from the cooling air current plate 11b.
The support plate 3 extends toward the support plate 3 side, that is, is provided so as to form an acute angle β2 downward.

In the heating furnace configured in this manner, the cooling air from the cooling fan is blown in a spiral manner onto the furnace tube 4, halogen bulb 6, heat insulating material 7, and reflector plate 8, which corresponds to the shaded area in Figure 5. The wind is strong and the wind in other parts is weak, but each cooling air current plate 1
4, 15, 16, 17 distances L1, l4, l6,
l7 is shorter than the distances l2, l3, l5, and l8, respectively, and each cooling air baffle plate 14, 1
5, 16, 17 have acute angles α1, α2, β1, β2, the cooling effect of each part can be made the same, and the cooling air current plate 11a, 11b,
11c, 12a, 12b, and 12c improve the cooling effect on the furnace tube 4 and the like.

[Brief explanation of the drawing]

Figure 1 is a partially omitted cutaway front view of a conventional heating furnace.
Figure 2 is a sectional view taken along line A-A in Figure 1, Figure 3 is a right side view of a conventional heating furnace, Figure 4 is a perspective view of the heating furnace according to this invention, and Figure 5 is a right side view of the same. It is a diagram. 2, 3... Support plate, 4... Furnace tube, 6... Halogen light bulb (heating bulb), 9... Cooling fan, 11a,
11b, 11c...first cooling air baffle plate, 12
a, 12b, 12c...second cooling air current plate, 1
3...Exhaust port, 14...Third cooling air baffle plate, 1
5... Fourth cooling air current plate, 16... Fifth cooling air current plate, 17... Sixth cooling air current plate.

Claims (1)

[Scope of utility model registration request] A furnace body supported by support plates provided above and below within the machine casing, a heating bulb provided between the support plates so as to surround the outer periphery of the furnace body, and a It is formed by first and second cooling air rectifier plates that sandwich the furnace body and the heating bulb and intersect with the support plates, and have a cooling air supply port at one end and a cooling air outlet at the other end. a cooling air passage having an air exhaust port;
A cooling fan provided facing the cooling air supply port and a position on the upper surface of the upper support plate on the side of the cooling air supply port that is biased toward the second cooling air current plate side to the first cooling air current flow plate side. a third cooling air baffle plate that is inclined toward the upper support plate and is provided substantially perpendicularly to the upper support plate; a fourth cooling air baffle plate that is inclined from a biased position toward the second cooling air baffle plate and is provided substantially perpendicularly to the lower support plate; and the upper and lower support plates on the cooling air supply port side. a fifth cooling air baffle plate provided so as to be inclined toward the upper support plate from a position biased towards the lower support plate at a position close to the first cooling air baffle plate between the cooling air baffles; A sixth cooling air provided so as to be inclined from a position biased toward the upper support plate toward the lower support plate at a position close to the second cooling air baffle plate between the upper and lower support plates on the supply port side. A heating furnace consisting of a rectifier plate.