JPS6337739Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a support structure for a heater body consisting of a spiral sheathed heater used in an electric stove or the like.

A conventional support structure for a heater body of an electric stove or the like is shown in FIGS. 1 and 2.

In the figure, 51 is a heater body in which a bar-shaped sheathed heater 52 is formed in a spiral shape and a flat surface 53 is formed on the upper surface to increase the contact area with the object to be heated; 54 is a heater body that supports the sheathed heater 52 and is A support member 57 is a support member to which a fixing plate 55 for holding the sheathed heater 52 at a caulking portion 56 is welded, and 57 is a holding plate for holding the terminal portion of the heater body 51.

Therefore, when a cooking pot or the like is placed as an object to be heated, if the cooking pot has a flat bottom, the contact surface of the sheathed heater 52 is the flat surface 53, so the contact area between the two is large. Therefore, the heat generated by the heater body 51 is transferred extremely efficiently.

However, since the shape of the object to be heated is not always flat, even if the upper surface of the heater body 51 is formed uniformly flat as described above, it is not always possible to maintain a good contact state between the two. In addition, the heater body 51 is manufactured with precision so that the flat surface 53 on the top surface of the heater body 51 is flush with the surface, even though it undergoes processes with extremely high processing ratios, such as spiral processing of the sheathed heater 52, press processing of the flat surface 53, and bending of both ends. The entire annular portion is often supported by the support member 54, but as the sheathed heater 52 generates heat, the heater body 51 itself becomes extremely high temperature (600°C or higher), and the heater body 51 produced through the above process becomes hot. Due to the expansion, an abnormal deformation occurs, and as a result, the flat surface 53, which was precisely leveled in the above process, changes up and down with the support part of the support member 54 as the center in each spiral ring part.
For this reason, the contact area with the bottom of the cooking pot is reduced, and the efficiency of transmitting the generated heat is significantly reduced. What's worse is that these changes are not uniform and always appear in different ways due to the influence of time, making countermeasures even more difficult.

In view of the above, this idea was made, and by providing a support member that supports the outer ring part of the heater body and has a gap between it and the inner ring part, the heat generated by the heater body can be effectively transferred to the heated object. The purpose of the present invention is to provide a support structure for a heater body that can transmit energy to the user.

An embodiment of this invention will be described below with reference to FIGS. 3 to 7. In the figures, 31 is a rod-shaped sheathed heater having terminal portions 5 at both ends, and 1 is a rod-shaped sheathed heater 31 formed into a spiral shape. In addition, a heater body having a flat surface 9 press-molded on the upper surface, 6 a corner portion of the innermost ring which is bent so as to draw out the sheathed heater from the innermost ring portion 8 of the spiral ring, and 20 a belt-shaped stainless steel plate is welded. The support member for the heater body 1 is formed into a substantially square shape, and the abutting end face portion 21 between the support member and the heater body 1 is set flush with the portion supporting the outermost ring portion 7 of the heater body 1. ,
Further, it is provided so as to be inclined downward toward the innermost ring portion 8 side. Reference numeral 22 denotes the other end face portion of the support member 20 corresponding to the abutting end face portion 21, which is formed so that its entire surface is flush with the other end face portion, and is stably placed on a flat top plate (not shown) of an electric stove or the like. Ru. 23 is the end surface portion 22
10 is a heater holding fitting made of a substantially shaped stainless steel plate that loosely attaches the outermost ring portion 7 to the support member 20; 11 is a portion of the notch portion 23; , a convex portion to which the outermost ring portion 7 is welded via the support member 20; 24 is a semicircular recess corresponding to the innermost ring corner portion 6;
Reference numeral 40 denotes a holding plate that holds both ends of the sheathed heater 31, and the ends from the outermost ring part 7 and the innermost ring part 8 are welded.

In the support structure for the heater body 1 configured as described above, even when the heater body 1 is in a heat generation state, the heater body 1
is supported by the outermost ring part 7, and the inner ring side has a gap between it and the supporting member 20 in the downward direction, so that deformation due to thermal expansion escapes downward, and therefore the object to be heated such as a cooking pot and the heater The state of contact with the body 1 is maintained stably, and extremely high heat transfer efficiency is maintained.

Further, in this embodiment, the heater body 1 is attached to a support member 2 via a presser fitting 10 welded to the heater body.
Since the heater body 1 is loosely supported at zero, deformation of the heater body 1 due to thermal expansion can be easily relieved.

In this embodiment, the sheathed heater is described as having a metal outer tube, but other materials, such as those having a tubular outer tube such as a quartz tube, will have the same effect.

Therefore, according to this invention, by providing a support member that supports the outer ring part of the heater body and has a gap between it and the inner ring part, the deformation of the heater body due to thermal expansion is absorbed into this gap. Therefore, the state of contact between the heater body and the object to be heated is maintained stably, and there is an effect that the heat generated by the heater body is efficiently transferred to the object to be heated.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a conventional example, Fig. 2 is a side view with the main parts cut away, Fig. 3 is a plan view showing the mounting structure of the heater body of an embodiment of this invention, and Fig. 4 is the same. FIG. 5 is a perspective view of the supporting member; FIG. 6 is a diagram showing the heater body attached to the supporting member with a holding fitting; FIG. 7 is a perspective view of the holding fitting. . In the figure, 1 is the heater body, 7 is the outermost ring part, and 8 is the heater body.
is the innermost ring part, 9 is the flat surface, 10 is the presser metal fitting, 20
is a support member.

Claims (1)

[Claims for Utility Model Registration] (1) A heater body formed in a spiral shape, on which an object to be heated is placed, and a spiral outer ring portion of the heater body supported from below and connected to a spiral inner ring portion. A support structure for a heater body, comprising a support member having a gap therebetween. (2) The support structure for a heater body according to claim 1, wherein each of the spiral ring-shaped portions of the heater body facing the object to be heated has a flat surface.