JPS6336244B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric cooker having a heater on its side.

Conventionally, this type of electric cooker has been used, such as jar rice cookers that heat from the bottom and sides of the pot, those that heat only from the bottom, and those that heat from the bottom but use air convection to accelerate the temperature rise on the side of the pot. The main body, which is formed by a cylindrical outer frame and a bottomed cylindrical protective frame provided inside the outer frame, has a double structure. In order to minimize the escape of heat from inside the main body, such electric cookers close the main body by bringing the outer frame and protective frame into close contact via a roughly ring-shaped upper frame provided at the upper end of the outer frame. The condition was as follows. Then, the pot is stored inside the protective frame and cooking is done. However,
In such a closed state, if a heater that heats the sides of the pot is attached to the main body by wrapping it around the outer periphery of the protective frame, the heat from this heater is not only transmitted to the pot, but also to the protective frame, causing damage to the protective frame. The resin upper frame that connects the outer frame deteriorates due to heat. There were also problems such as the upper frame deforming due to the expansion of the air inside the main body.

The present invention has been made in order to solve the above-mentioned conventional problems, and includes a substantially ring-shaped upper frame fixed to the upper end of a cylindrical outer frame, and a protrusion extending over the entire circumference on the upper surface of the upper frame. At the same time, an air groove is formed inside the protrusion to serve as an air passage, and a portion of the air groove is provided with an air groove that protrudes upward from the bottom surface of the air groove and is higher than the wall of the air groove. By forming a plurality of mounting steps with a raised height and fixing the flanges of the bottomed cylindrical protection frame to these mounting steps to form a gap between the flanges and the wall, the outer surface of the protection frame can be Air heated by a heater placed on the top of the upper frame passes through the gap, and the air accumulates between the pot and the protective plate due to the presence of the protrusion provided all around the upper surface of the upper frame. In this way, the pot can be effectively kept warm, and the number of contact parts between the protective frame and the upper frame is reduced to reduce the adverse thermal effects on the upper frame.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a main body, 2 is a bottomed cylindrical pot inside the main body 1, and 3 is a lid that the main body 1 covers. In addition, the main body 1 has a cylindrical protective frame 5 with a bottom inside a cylindrical outer frame 4, and a heater 6 at the inner bottom of the protective frame 5, and a temperature detection device 7 at the center of the heater 6, which is connected to the bottom of the pot 2. Prepared for contact. 8 is a heat insulating material arranged between the outer frame 4 and the protective frame 5; 9 is a side heater wrapped around the outer periphery of the protective frame 5; 10 is a substantially ring-shaped member made of resin fixed to the upper opening of the outer frame 4; This is the upper frame of
In addition, the lid 3 includes an outer lid 12 that is provided with a handle 11 by integral molding, and a radiation plate 13 provided on the lower surface of this outer lid 12.
A pin 14 is provided at the center of the lower surface of the radiation plate 13.
An inner lid 15 is provided in a detachable manner. A shaft 16 rotatably supports the outer cover 12 and is provided on the upper side of the outer frame 4.

Next, the structure of the upper part of the main body 1 is shown in Figures 1 to 4.
This will be explained with reference to the figures. The upper frame 10 is approximately ring-shaped, and the upper surface of the upper frame 10 has a protrusion 17 extending all around the circumference, and on the outside thereof, a dew catch groove 18 for receiving dew dripping from the lid 3 is formed around the entire circumference. It is set up across the street. Further, an air groove 19 serving as an air passage is formed in the circumferential direction of the upper frame 10 inside the protrusion 17, and a portion of the air groove 19 protrudes upward from the bottom surface of the air groove 19, and the air groove 19 wall part 20
A plurality of mounting steps 21 are provided which are higher by a dimension D. Reference numeral 22 denotes a mounting bracket formed by bending a sheet metal with a substantially U-shaped cross section, and as shown in FIG.
The flange 23 provided on the upper edge of the protective frame 5 and the mounting step 21 are fixed with screws.

Next, the gap formed near the upper frame 10 will be explained with reference to FIG. 4. 24 is a gap formed between the flange 23 and the wall 20 due to the dimensional difference D between the wall 20 of the air groove 19 and the mounting step 21.
Furthermore, the tip of the flange 23 is bent downward to the middle of the air groove 19. 25 is a gap formed between the lid 3 and the upper frame 10.

In the above configuration, when a predetermined amount of rice and water are prepared in the pot 2 and the power is turned on, the side heater 9 is energized and the side heater 9 generates heat. At the same time or after a certain period of time has elapsed, the heater 6 is also energized and the heater 6 also generates heat. At this time, the heat applied to the protective frame 5 by the side heater 9 is transmitted to the pot 2 by heat radiation. It also warms the air 26 inside the main body 1. The warmed air passes through the gap 24 and accumulates between the pot 2 and the protection plate 5. The air warmed in this way is transferred to the protrusion 17 of the upper frame 10.
Since the rice is stored further inside, even if cold outside air enters through the gap 25, it will not cool the pot 2 and the rice will be perfectly cooked. Furthermore, since the protective frame 5 is in contact with the upper frame 10 only through the mounting steps 21, there is little conduction heat transmitted from the protective frame 5 to the upper frame 10, and almost no adverse thermal effects are caused on the upper frame 10. I don't call.

It should be noted that the present invention is not limited only to the embodiments described above and shown in the drawings, and it goes without saying that the present invention can be implemented with appropriate changes within the scope of the invention.

As is clear from the above description, according to the present invention, a substantially ring-shaped upper frame is fixed to the upper end of the cylindrical outer frame, and a protrusion is provided on the upper surface of the upper frame along the entire circumference. An air groove that serves as an air passage is formed inside this protrusion, and furthermore, a part of the air groove protrudes above the bottom surface of the air groove and is higher than the wall of the air groove. A plurality of mounting steps are formed, and the flanges of the bottomed cylindrical protection frame are fixed to these mounting steps to form a gap between the flanges and the wall. The air heated by the installed heater passes through the gap, and the air accumulates between the pot and the protection plate due to the presence of the protrusion provided all around the upper surface of the upper frame. Even if cold outside air enters through the gap between the upper frame and the lid, the pot will not be cooled down due to the presence of the ridges, and as a result, the pot will not be effectively kept warm. Also, the contact between the protective frame and the upper frame is such that the flanges of the protective frame are in contact with multiple mounting steps provided on the upper frame, so the contact area is small, and therefore the thermal impact on the upper frame is small. It can also reduce negative effects.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of an electric cooker according to an embodiment of the present invention, Fig. 2 is a perspective view of the upper frame and mounting bracket of the electric cooker, and Fig. 3 is a longitudinal cross-sectional view of essential parts of the electric cooker. , FIG. 4 is a longitudinal cross-sectional view of the main parts of the electric cooker. 3...Lid, 4...Outer frame, 5...Protection frame, 9...
Heater, 10... Upper frame, 21... Mounting step, 23
...Flange.

Claims (1)

[Claims] 1. A cylindrical outer frame, a bottomed cylindrical protective frame provided within the outer frame and having a flange formed around the upper opening, a pot removably installed in the protective frame, and the protective frame. It has a heater disposed on the outer surface of the frame, and a lid that covers the upper part of the outer frame, a substantially ring-shaped upper frame is fixed to the upper end of the outer frame, and a ring-shaped upper frame is fixed to the upper end of the outer frame, and a ring-shaped upper frame is attached to the upper surface of the upper frame all around the entire circumference. A protrusion is provided, and an air groove is formed as an air passage located inside the protrusion, and a portion of the air groove protrudes upward from the bottom surface of the air groove, and a wall of the air groove is provided. An electric cooking appliance comprising: a plurality of mounting step portions having a height higher than that of the wall portion; and a flange of the protective frame being fixed to the mounting step portions to form a gap between the flange and the wall portion.