JPH11102768A - Cooker - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a heating cooker which can perform safety measures without incurring cost and does not cause deterioration in cooking performance. SOLUTION: A heater 40 for heating an object to be cooked is provided in a heating chamber 35, and the heater 40 is provided with both side plates 31 of the heating chamber.
A glass pipe 43 having both ends inserted and held in concave portions 42, 42 of a pair of insulating insulators 41, 41 attached to 32, and a heater wire 44 wound in a coil shape and disposed in the glass pipe. A heating cooker having an end portion 44a of a heater wire 44 in a concave portion 42 of the insulator 41.
The winding density of 44b is made denser than other parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device provided with a heater for heating an object to be cooked in a heating chamber.

[0002]

2. Description of the Related Art Conventionally, there has been known a heating cooker in which an object to be cooked is heated by a heater provided in a heating chamber. As shown in FIG. 3, the cooking device includes two side walls 2 of a heating chamber 1.
, A pair of insulating insulators 3 is attached thereto, and both ends 4A and 4B of the glass pipe 4 are inserted into recesses 3A provided in the insulating insulator 3, and a heater wire 5 wound in a coil shape is disposed in the glass pipe 4. Things.

The winding density of the heater wire 5 is made higher at both ends La and Lb than at the center Lc so as to prevent uneven printing.

[0004]

However, in such a heating cooker, no problem occurs in a normal use condition, but an abnormal voltage (for example, 200 V) is applied to the heater wire 5.
When the voltage is applied to the heater wire 5, the temperature of the heater wire 5 becomes abnormally high, and if the heater wire 5 is not broken even after a long time elapses, the glass pipe is broken and the heater wire 5 is exposed, which may lead to a short circuit accident. was there.

For this reason, safety measures are required, but there is a problem that connecting a current fuse to the heater wire 5 increases the cost. Further, if the heat-resistant temperature of the heater wire 5 is set low so that the heater wire 5 is cut before the glass pipe 4 is broken, it is not possible to heat the object to be cooked at a high temperature, and the cooking performance deteriorates. was there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a heating cooker that can perform safety measures without increasing the cost and that does not cause deterioration in cooking performance. It is in.

[0007]

According to the present invention, in order to achieve the above object, a heater for heating an object to be cooked is provided in a heating chamber, and the heater includes a pair of heaters attached to both side walls of the heating chamber. A heating cooker having a glass pipe whose both ends are held in an insulating insulator, and a heater wire wound in a coil shape and disposed in the glass pipe, wherein the heater wire is provided in at least one of the insulators. Is characterized by having a higher winding density at the end than at other portions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cooking device according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 20 denotes a heating cooker. The heating cooker 20 includes an outer case 23 having an openable and closable door 21 and an operation panel 22 on the front surface, and an inner case 23 inside the outer case 23. And an inner case 30 provided in the main body.

The inner case 30 includes side plates (sidewall portions) 31, 3
2, a top plate 33, and a back plate 34, which form a heating chamber 35. Inside the heating chamber 35, there are provided a grill 36 on which the food is placed, and a pair of heaters 40, 40 for heating the food placed on the grill 36 from above and below.

The heater 40 is, as shown in FIG.
A glass pipe 43 having both ends inserted and held in circular recesses 42, 42 formed in a pair of insulating insulators 41, 41 attached to the glass pipes 43, and a heater wire 44 disposed in the glass pipe 43. And

The heater wire 44 is wound in a coil shape, and its winding density is low at the center Ma. Further, the winding density is high at the side portions Nb and Nc on both sides of the central portion Na, so that uneven printing does not occur. Further, the heater wire 4 in the recess 42 of the insulator 41
At both ends 44a, 44b of 4, the winding density is higher (higher density) than the side portions Nb, Nc, and has a fuse function.

At both ends 44a and 44b, the heater wires 4
4 is wound at a high density, but enters into the concave portion 42 of the insulator 41 and the insulator 41 blocks the heat generated in this portion. Therefore, in a normal use state, the amount of heat to be cooked in this portion is reduced. It does not become unusually large, and it is possible to prevent the cooking object from becoming uneven in grilling.

When an abnormal voltage is applied to the heater wire 44,
At both ends 44 a and 44 b of the heater wire 44, the wire is wound at a high density and further enters the recess 42 of the insulator 41, so that the temperature becomes higher than other portions. And
The larger the abnormal voltage is, the faster the temperature rises, and the temperature difference from other parts increases rapidly. Therefore, before the glass pipe 43 becomes hot and breaks, the heater wire 44 is melted and burnt out at both ends 44a and 44b. As a result, a short circuit accident or the like is prevented beforehand, and safety is ensured.

As described above, both ends 44a, 44a,
Since the fuse function is provided to 44b, it is not necessary to connect a fuse to the heater wire 44, so that safety measures are inexpensive. Further, since the fuse function does not require the heat-resistant temperature of the heater wire 44 to be set low, the cooking can be performed at a high temperature as in the related art. For this reason, the cooking performance does not decrease.

In the above embodiment, both ends 44a and 44b of the heater wire 44 have a fuse function. However, it is needless to say that only one end may be provided.

[0017]

As described above, according to the present invention, a heater for heating an object to be cooked is provided in a heating chamber, and the heater is provided in a pair of insulating insulators attached to both side walls of the heating chamber. A heating cooker having a glass pipe having both ends inserted and held, and a heater wire wound in a coil shape and disposed in the glass pipe, wherein an end of the heater wire in at least one of the insulators is provided. Since the winding density is higher than that of the other parts, the heater wire is melted and burnt off at the end of the glass pipe before the glass pipe becomes hot and breaks. Therefore, it is not necessary to connect a fuse to the heater wire, which is an inexpensive safety measure.

Further, since the end portion of the dense heater wire is contained in the insulator, it is possible to prevent the unevenness of the object from being baked in a normal use condition. Further, since it is not necessary to set the heat-resistant temperature of the heater wire low, it is possible to heat and cook at a high temperature as in the related art, and the cooking performance is not reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a heating cooker according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a heater of the heating cooker shown in FIG.

FIG. 3 is a cross-sectional view showing a configuration of a heater of a conventional heating cooker.

[Explanation of symbols]

 31 Side plate (sidewall portion) 32 Side plate (sidewall portion) 35 Heating chamber 40 Heater 41 Insulation insulator 43 Glass pipe 44 Heater wire 44a End 44b End

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Takai 43 Horiyamashita, Hadano-shi, Kanagawa Pref.

Claims (1)

[Claims] 1. A heater for heating an object to be cooked is provided in a heating chamber. The heater includes a glass pipe having both ends held in a pair of insulating insulators attached to both side walls of the heating chamber, and a coil-shaped heater. And a heater wire disposed in the glass pipe and wound around the heater wire, wherein the winding density of the end portion of the heater wire in at least one of the insulators is made denser than other portions. A cooking device characterized by the above-mentioned.