JP3061189U - Plate heater - Google Patents

Abstract

(57) [Problem] To provide a plate heater that prevents distortion of a metal plate, has excellent durability, and can be implemented at low cost. A plate heater having a sheathed heater (2) mounted along the back surface of a metal plate (1),
The sheathed heater (2) was supported on the metal plate via a fastening clip (3) welded and fixed to the back surface of the metal plate (1).

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a plate heater incorporated in a system kitchen or the like.

[0002]

[Prior art]

 In recent years, plate heaters have been widely used as a heating source in kitchens of apartment houses and kitchens of independent houses. Conventional plate heaters have a structure in which a sheathed heater is brazed to the rear surface of a metal plate over the entire length.

[0003]

[Problems to be solved by the invention]

 However, in the conventional case in which the sheathed heater was brazed and fixed to the back surface of the metal plate over the entire length, the processing cost of brazing was high. Also, if there is a significant difference between the metal expansion coefficient of the metal plate and the metal expansion coefficient of the sheathed heater, the metal plate will be distorted by the heat effect during the brazing operation, so straightening must be performed after brazing. However, there is a possibility that distortion is newly added in the normal temperature processing.

In addition, since the expansion and contraction of the sheathed heater due to the thermal change due to the intermittent application of current is restricted by the brazing portion, if there is a remarkable difference in the metal expansion coefficient between the metal plate and the sheathed heater, Deformation force was repeatedly concentrated on the brazed part, and the brazed part was easily broken, sometimes causing a problem in durability.

In view of the above, an object of the present invention is to provide a plate heater which prevents distortion of a metal plate, has excellent durability, and can be implemented at low cost.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is characterized in that a sheathed heater arranged along the back surface of a metal plate is held in contact with the metal plate by a fixing clip.

[0007]

[Action]

 In the present invention, the sheathed heater is indirectly fixed to the back surface of the metal plate via a clip, and the sheathed heater is not fixed to the metal plate. In addition, the expansion and contraction of the sheathed heater is not restricted, so that the durability as a plate heater is improved.

[0008]

[Embodiment of the invention]

 The figure is a back view showing one embodiment of the plate heater. This plate heater has a sheath heater (2) arranged in a coil shape on the back surface of a stainless steel plate (1) having a thickness of 2 mm and a diameter of 163 mm. This sheath heater (2) is composed of three clip plates (3). It is fixed to the back of the stainless steel plate (1).

As shown in FIG. 2, each clip plate (3) has a bar member (4) formed with a sheath heater fitting recess (5) at a constant pitch, and both sides of each fitting recess (5). The part is welded and fixed to the back surface of the stainless steel plate (1) by spot welding or laser welding. As a result, the sheathed heater (2) is mounted so as to be relatively movable with respect to the stainless steel plate (1).

The change in the plate surface temperature when power is supplied to the plate heater configured as described above and a conventional plate heater in which a sheathed heater is disposed in a coil shape on the back surface of a stainless steel plate and brazed over the entire length is shown in FIG. As shown in FIG. From this figure, it can be seen that the case where the present invention is applied can start up more quickly than the conventional structure.

In the above embodiment, the sheathed heater (2) is arranged in a coil shape on the back surface of the stainless steel plate (1), but the sheathed heater (2) is arranged in a meandering shape on the back surface of the stainless steel plate (1). It may be.

FIG. 3 shows another embodiment in which two sheathed heaters (2) are arranged in a coil shape on the back surface of a stainless steel plate (1) with the inside and outside positioned. With this configuration, the required amount of heat can be sufficiently obtained by switching between the state of using only the inside and the state of using both inside and outside according to the size of the pot bottom placed on the plate heater. Can be.

[0013]

[Effect of the invention]

 In the present invention, since the sheathed heater is indirectly fixed to the back surface of the metal plate via the clip, there is no thermal effect when the sheathed heater is fixed to the metal plate, and the occurrence of thermal distortion can be eliminated. As a result, it is possible to omit the distortion removal processing after the installation of the sheathed heater, and it is possible to increase the productivity. Since the expansion and contraction of the sheathed heater is not restricted, the durability as a plate heater is improved.

Further, since the sheathed heater is arranged in a non-constrained state with respect to the metal plate, it does not hinder thermal expansion and contraction and does not repeatedly exert a deformation force. The performance is improved.

[Brief description of the drawings]

FIG. 1 is a rear view showing one embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a diagram showing a relationship between an energization time and a surface temperature.

FIG. 4 is a rear view showing another embodiment.

[Explanation of symbols]

 1. Metal plate, 2. Seed heater, 3. Clip.

Claims (2)

[Utility model registration claims] 1. A plate heater comprising a sheath heater (2) mounted along the back surface of a metal plate (1), wherein the sheath heater (2) is welded and fixed to the back surface of the metal plate (1). A plate heater supported by an attaching clip (3). 2. The plate heater according to claim 1, wherein the sheathed heater (3) is arranged in a coil shape on the back surface of the metal plate (1).