JPS6160327B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric range having a sheathed heater as a heating element for heating a pot or the like.

Configuration of conventional examples and their problems Generally speaking, cooking operations that can be performed in a microwave include baking, boiling, sautéing, steaming, frying, boiling, and cooking. There are two types of heat sources for microwave ovens: gas and electricity. Gas ovens use flame to heat, making them suitable for grilling fish and other dishes over an open flame.
Although pots with spherical bottoms like woks have the advantage of being able to heat evenly, they use oxygen for combustion and produce carbon monoxide, which pollutes indoor air. In addition, there is a problem in that when the fire is on a low flame, the fire may go out without your knowledge. Also, since there is a flame, there is a risk of igniting combustible materials. Furthermore, there are issues with efficiency being as low as 30% to 40%.

On the other hand, ranges that use electricity as a heat source include electromagnetic induction heating ranges, ranges that use sheathed heaters as their heat source, and ranges that use exposed nichrome wire heaters as their heat source.In the case of a typical range that uses a sheathed heater as its heat source, , there is less oxygen consumption due to combustion, less air pollution due to the generation of carbon monoxide, and there is less fear of the fire going out or igniting combustible materials. When the pot is flat, the efficiency of heat transfer from the heater to the pot is more than 70% through conduction, radiation, and convection, but on the other hand,
As shown in FIG. 1, when the bottom is spherical like the wok 30, not only does the transfer of heat by conduction decrease, but also the distance between the sheathed heater 31 and the wok 30 at the outer periphery of the sheathed heater 31 is reduced. Because the radiant heat can become large, it is not possible to obtain enough radiant heat and the efficiency is extremely low.It is not possible to heat the entire pot, and the food cannot be heated evenly. There was an issue where the system was said to be unstable.

Purpose of the Invention The present invention has enabled an electric range using a sheathed heater as a heat source to efficiently and uniformly heat the entire pot, not only for pots with flat bottoms but also pots with spherical bottoms such as woks. The purpose is to provide electric ranges.

Structure of the Invention The electric range of the present invention uses a switching device to switch a plurality of sheathed heaters so that they are positioned in a horizontal plane and in an inverted conical shape, so that it can be used in both a flat-bottomed pot and a Chinese pot.

DESCRIPTION OF EMBODIMENTS The structure of the present invention will be explained based on FIGS. 2 to 4.

In FIGS. 2, 3, and 4, 1 is an electric range body, and on the top plate 2 there are a stove, 4,
4', 4' are arranged at three locations. 5 is a switch to switch between stove 4'' and grill 6, 19 is a knob to switch between using a flat-bottomed pot and a wok.
It slides up and down.

8, 8', 8'' are sheathed heaters provided concentrically in the stove 4, and their terminals 9, 9',
9" connected in series or parallel. 10,1
0', 10'' are the heater support fittings of the sheathed heaters 8, 8', 8'', and each is connected to the connecting fitting 22 at the center.
It is connected to a connecting rod 11 which is connected to a lever 7 which switches between using a flat bottomed pot and a wok. The bearing 12 of the connecting rod 11 is integrated with the rotating table 13 of the lever 7, and the bearing 12 of the sheathed heater 8
It is fixed to the bottom of 4. Reference numerals 15 and 15' designate slide guides for the heater support fittings 10 and 10', which are rotatably attached to slide guide rotary tables 16 and 16' provided on the receiving tray 14. Although not shown, the heater support fitting 10'' is also guided by a slide guide. 17, 17', 17'' are fixing claws of the sheathed heater, and the pins 23, 23', 23'' are for supporting the heater. It is slidably attached to elongated holes 18, 18', 18'' of the metal fitting 10. 19 is a knob of the lever 7, which is connected to the heater support fittings 10, 10', 1 described above.
0'' and the connecting rod 11, etc., constitute a switching device for the sheathed heaters 8, 8', 8''. 20 is a flat-bottomed pot, and 21 is a wok.

Fig. 2 shows the operation of the electric range with the above configuration.
This will be explained based on FIG.

First, place the pot 20 with a flat bottom on the stove 4,
When the lever 7 is moved downward and fixed at that position as shown in FIG. 2, the heater support fittings 10, 10'1
0'' is pushed up by the connecting rod 11, and 3
The sheathed heaters 8, 8', 8'' are horizontal as shown in Figure 3, and come into contact with the bottom of the pot 20.Then, by turning the heat adjustment knob 3, the sheathed heaters 8, 8', 8'' are turned on, respectively. Heat is generated, and the pot 20 is heated by conduction, radiation, and convection of heat from the sheathed heater.

Next, when using the wok 21, when the lever 7 is moved upward and fixed at that position as shown in FIG. 4, the connecting rod 11 is pulled downward along the bearing 12 and the slide guides 15, 15' rotates around the slide guide rotation tables 16, 16', and the heater support fittings 10, 10', 10'' are pulled diagonally along the slide guides 15, 15'.Then, the sheathed heaters 8, 8', 8 '' are arranged in an inverted conical shape downward along the elongated holes 18, 18', 18''. When the wok 21 is placed on the stove 4 in this state, the three sheathed heaters 8, 8', 8'' Even if it is impossible to touch the bottom of the wok 21, you can place the sheathed heater almost close to it, and when you turn the heat adjustment knob 3 to make the sheathed heater generate heat, the wok will be heated by radiant heat and some heat conduction. can be done. In this embodiment, only one of the three stoves 4, 4', and 4'' is provided with a switching device for switching between a flat-bottomed pot and a wok, but even if there are multiple switching devices, Also, the number of stoves does not have to be three, but can be one or two.

Effects of the Invention As is clear from the above examples, the present invention has the following excellent effects.

(1) By holding the sheathed heater close to the bottom of a pot with a spherical bottom, such as a wok,
Since radiant heat can be used effectively and heat can also be partially transferred through conduction, it can heat efficiently and uniformly, just like a flat-bottomed pot.

(2) By arranging the sheathed heater in an inverted conical shape for a pot with a spherical bottom such as a wok,
Can hold the pot stably.

(3) Therefore, while maintaining the advantages of electric ranges, it is possible to achieve uniform heating and improve efficiency in woks, which had been an issue when compared with gas ranges.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing a conventional electric range using a wok, Fig. 2 is a perspective view of an electric range showing an embodiment of the present invention, and Fig. 3 is an electric range with a flat bottom. FIG. 4 is a longitudinal cross-sectional view showing the electric range using a Chinese wok. 1... Electric range body, 8, 8', 8''... Sheathed heater, 10, 10'... Heater support fitting, 1
DESCRIPTION OF SYMBOLS 1...Connecting rod, 19...Lever constituting a switching device, 20...Flat-bottomed pot, 21...Wok.

Claims (1)

[Claims] 1. An electric range equipped with a plurality of concentrically arranged sheathed heaters that heat a pot, etc., and a switching position for switching the plurality of sheathed heaters to be positioned in a horizontal plane or in an inverted conical shape.