JPH0629678B2 - Electric stove - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a smooth top type electric hob used at home.

Conventional technology This type of conventional electric stove is installed in the vicinity of glass ceramic plates, heaters or heat insulating materials so that the glass ceramic plates, heaters or heat insulating materials do not exceed their upper temperature limits. A thermostat that opens and closes the contacts with a long rod-shaped heat-sensitive part was provided, and control was performed by this thermostat. That is, in FIG. 5, reference numeral 1 is a plate made of crystallized transparent glass or crystallized semi-transparent porcelain, and a heater unit 2 is fixed to the back surface of the plate 1. The heater unit 2 includes a cylindrical heat insulating material 3, a case 4 that covers the side surface and the bottom surface of the heat insulating material 3,
A plurality of glass tube lamp type heaters 6 arranged in parallel to the inner bottom portion 5 of the heat insulating material 3, and a long rod-shaped heat sensing portion provided in the inner bottom portion 5 and extending in a groove 7 passing through the center of the inner bottom portion 5. A thermostat 9 having 8 is provided.

Problems to be Solved by the Invention However, in the above conventional configuration, the thermostat 9
The ON / OFF width is more than ten degrees Celsius because the contact of is mechanically opened and closed.
In addition, since the rod-shaped heat-sensitive part 8 is formed by inserting an amber rod in the quartz glass tube, the heat mass is large, and as a result, the thermal response is deteriorated, and as a result, the ON / OFF width is further expanded. As a result, cooking was inconvenient. Further, since the heat-sensitive portion 8 has the above-mentioned structure, it is easily damaged by assembling, transportation, and rough handling during use, and is expensive. And again, since this heat-sensitive part 8 can be seen through the plate 1,
It also had problems such as poor quality.

The present invention solves such a problem by turning on and off.
The object is to reduce the width and improve the inconvenience of cooking, and to provide a highly reliable electric stove.

Means for Solving the Problems In order to solve the above problems, the present invention relates to a plate made of glass ceramic, a container-shaped heat insulating material arranged to form a space on the back surface of the plate, and the container. A heat-dissipating member comprising a tubular member penetrating the side wall of the container-shaped heat insulating material, and a heater disposed in the space of the heat-insulating material. A thermistor is provided via a heat insulating material at a position where the radiant heat of the heater is directly received through the space inside the tubular member.

Operation With this configuration, it is possible to detect the temperature by synchronizing the heat movement of the plate or heater and the heat movement of the thermistor. As a result, the ON and OFF widths can be shortened, the inconvenience of cooking can be improved, and a highly reliable electric stove can be obtained.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. In the figure, the electric stove according to the present embodiment is a bottomless, hollow box-shaped electric stove main body 21, a heater unit 22 composed of a heater as a heating source and a heat insulating material, and an amount of electricity supplied to the heater is controlled. And a controller 23 for

The plate 24, which constitutes the upper part of the electric hob body 21 and on which the cooking pot is placed, is made of a ceramic material such as crystallized transparent glass or crystallized translucent porcelain. Even if you spill the water or drop the cooking utensils, you do not have to worry about cracking.

Next, the heater unit 22 provided on the upper back surface of the electric hob body 21 includes a container-shaped heat insulating material 25, a case 26 covering the side surface and the bottom surface of the heat insulating material 25, and an upper surface of the concave portion of the heat insulating material 25. A reflecting plate 27 made of a heat-resistant material provided in
A plurality of glass tube lamp type heaters 28 are arranged so as to be parallel to the upper surface of the reflection plate 27, and the side wall 25a of the heat insulating material 25 penetrates the side wall 25a, and the radiant heat of the heater 28 is directly applied. Cylindrical member 2 at the receiving position
9 is provided, the open end of one end of the tubular member 29 faces the space 30 formed between the back surface of the plate 24 and the container-shaped heat insulating material 25, and the other end extends outside the heater unit portion 22. I'm putting it out. The outer end of the tubular member 29 is covered with another heat insulating material 31, and the heat insulating material 31 is provided with a thermistor 32. In this way, the heat sensitive portion 33 is configured.

The heater unit 22 configured as described above has a packing 34 made of asbestos or the like on the peripheral flange of the heat insulating material 25 so as to contact the upper back surface of the electric hob body 21.
It is in contact with. Further, the heater unit 22 is lifted by a spring 37 via a support metal fitting 35 and a sliding metal fitting 36 provided on the bottom surface of the heater unit portion 22 so that the heater unit portion 22 can come into contact with the upper back surface of the electric hob body 21.

Since the present invention is configured as described above, the temperature inside the space 30 rises due to the heat generated by the glass tube lamp heater 28. As a result, the upper plate 24 is heated, and the cooking pot or the like placed on the plate 24 is heated.

On the other hand, the radiant heat to the lower side of the heater 28 is blocked by the reflection plate 27 and the heat insulating material 25, so that the electric hob body 2
The temperature rise of 1 is suppressed. The thermistor 32 is a hot air flow in the space 30 and the glass tube lamp type heater 28.
It is heated via the heat insulating material 31 by the direct radiant heat from. And the temperature of this thermistor 32 is the plate 24
When the temperature rises to the upper limit, the temperature is adjusted to a desired temperature depending on the type and thickness of the heat insulating material 31 or the length of the tubular member 29 so that it is turned off.

Since the thermistor 32, the heat insulating material 31, and the tubular member 29 reduce the heat mass, they react sensitively to the radiant heat of the glass tube lamp heater 28, and the plate 2
The temperature of 4 can be kept almost constant with very little ON and OFF width. Further, since the thermistor 32 is not directly exposed to the glass tube lamp type heater 28 and the space 30 and is located at a relatively low temperature in synchronization with the plate 24, it is possible to use one having a low heat resistance temperature. As a result, it can be obtained at low cost.

Since the resistance change due to the temperature change of the thermistor 32 is processed by the electric circuit, the ON / OFF width can be made smaller and the noise electric wave can be made smaller than the mechanical ON / OFF control. Moreover, since the thermistor 32 is small and strong, it is easy to handle, and as a result, a highly reliable electric stove can be obtained.

FIG. 4 shows another embodiment of the present invention. In this embodiment, one end faces the space 30 in which the glass tube lamp heater 28 is located, and the other end reaches the outside of the heat insulating material 25. As described above, the metal plate 38 that penetrates the side wall 25a of the heat insulating material 25 is provided, and the thermistor 32 is attached to a portion of the metal plate 38 located outside the heat insulating material 25.
The tip of the metal plate 38 is attached to the heater unit 22.
It is locked to the metal fitting 39 fixed to. The thermistor 32 is heated by the hot airflow in the space 30 whose temperature is raised by the heating of the glass tube lamp heater 28 and the direct radiant heat from the glass tube lamp heater 28 as in the above-described embodiment, and the temperature of the plate 24 is increased. It controls. Also in this case, the material of the metal plate 38, the material of the metal plate 38, so that the temperature of the plate 24 can be controlled by the thermistor 32 as described above.
It goes without saying that the places and shapes are chosen to match.

As described above, according to the present invention, since the plate temperature is controlled by the thermistor provided at a position synchronized with the plate temperature, the vertical width of the plate temperature can be made extremely small. As a result, the temperature of the pan placed on the plate can be kept substantially constant, and the disadvantage of cooking can be eliminated. Also, since the thermistor is small and durable, there is no fear of breaking, and since there is only a slight temperature-sensitive part in the place visible from the outside of the plate lower surface, there is no deterioration in quality. Moreover, since the thermistor is guided to the lower temperature part by the heat sensitive part, the thermistor itself can be used with a low heat resistance temperature, and as a result, it can be obtained at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an electric hob showing an embodiment of the present invention, FIG. 2 is a perspective view of the electric hob, and FIG. 3 is a plan view of the essential part of the electric hob. FIG. 5 is a sectional view of an essential part of an electric stove showing another embodiment of the present invention, and FIG. 5 is a sectional view of an essential part of a conventional electric stove. 24 ... Plate, 25 ... Insulating material, 28 ... Heater, 29 ... Cylindrical member, 30 ... Space, 32 ... Thermistor, 33 ... Heat sensitive part, 38 ... Metal plate.

Claims (1)

[Claims] 1. A container comprising a glass-ceramic plate, a container-shaped heat insulating material arranged to form a space on the back surface of the plate, and a heater arranged in the space of the container-shaped heat insulating material. A heat-sensitive part formed of a tubular member penetrating the side wall is provided on the side wall of the heat insulating material, and the end of the heat-sensitive part positioned outside the side wall directly receives the radiant heat of the heater through the space inside the tubular member. An electric stove with a thermistor installed through a heat insulating material.