Information
-
Patent Grant
-
6240837
-
Patent Number
6,240,837
-
Date Filed
Thursday, July 13, 200023 years ago
-
Date Issued
Tuesday, June 5, 200123 years ago
-
Inventors
-
Original Assignees
-
Examiners
-
CPC
-
US Classifications
Field of Search
US
- 099 339
- 099 340
- 099 448
- 099 449
- 099 400
- 099 401
- 126 381
- 126 369
- 219 429
- 219 436
- 219 438
- 219 439
- 219 441
-
International Classifications
-
Abstract
An electrothermal cooker comprises a casing, a cover, an inner pot, a heating device, and a pot base, and is characterized in: a plurality of heat insulators and a supporting device are disposed between the casing and the inner pot, and between the inner pot and the pot base respectively for efficient heat insulation, stable support, and cost reduction.
Description
BACKGROUND OF THE INVENTION
1. Field of the invention
This invention relates generally to electrothermal utensils, more particularly, it relates to an electrothermal cooker having a plurality of improved thermal insulator located between a casing and an inner pot, and a plurality of improved supporting means arranged between the inner pot and a pot base with better heat insulation and support effect.
2. Description of the prior art
A conventional electrothermal cooker, as disclosed in U.S. Pat. No. 4,995,312, mainly comprises a metallic pot and a heat-generating resistor, wherein the resistor is used to heat the pot up to 150° C. or more; as the pot is enclosed by a generic plastic casing that cannot stand temperature higher than 150° C., hence, an air layer is formed in the circular wall and the pot base of the pot for segregation of the plastic casing; the metallic pot is isolated by the air layer except that it is connected with a thermo-insulating ring, which also contacts the upper rim of the casing.
However, as the thermo-insulating ring is made of high-priced polyurethane or polyester, the competitive capability of the foregoing electrothermal cooker is inevitably weakened. In view of the defect, this invention is to provide an improved low-cost thermo-insulating structure with excellent efficacy for the electrothermal cooker.
SUMMARY OF THE INVENTION
The primary object of this invention is to provide an electrothermal cooker having a plurality of insulators disposed between a casing and an inner pot for achieving heat insulation efficiently and reducing cost.
Another object of this invention is to provide an electrothermal cooker having a plurality of supporting means disposed between an inner pot and a pot base for holding the inner pot stably.
In order to realize above said objects, this invention comprises a casing, a cover, an inner pot, a heating means, and a pot base, and is characterized in: a plurality of heat insulators and supporting means disposed between the casing and the inner pot, and between the pot base and the inner pot respectively.
For more detailed information regarding this invention together with further advantages or features thereof, at least an example of preferred embodiment will be elucidated below with reference to the annexed drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
The related drawings in connection with the detailed description of this invention, which is to be made later, are described briefly as follows, in which:
FIG. 1
is a lateral view of a preferred embodiment of this invention;
FIG. 2
is a partially lateral view (
1
) of the preferred embodiment of this invention; and
FIG. 3
is a partially lateral view (
2
) of the preferred embodiment of this invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In a preferred embodiment shown in
FIG. 1
, an electrothermal cooker of this invention comprises a metallic inner pot
12
, a casing
14
, a cover
16
, a heating means
22
, and a pot base
26
, and is characterized in: a plurality of heat insulators
18
disposed between the inner pot
12
and the casing
14
; and, a plurality of supporting means
24
disposed between the pot base
26
and the inner pot
12
so as to obtain insulation and support effect.
When the electrothermal cooker is used for frying foods, oil loaded in the metallic inner pot
12
will be heated to a temperature unbearable to the plastics-made casing
14
, therefore, the heat insulators
18
are arranged between the upper rim of both the casing
14
and the inner pot
12
for heat insulation. In addition, for enhancing insulation effect, an air layer
28
is reserved in the lateral wall and bottom face of the inner pot
12
to avoid direct contact of the casing
14
to the inner pot
12
. Moreover, the supporting means
24
utilized for supporting the inner pot
12
is made of a heat-insulating material.
As illustrated in
FIG. 2
, three pieces of the heat insulator
18
arranged between the casing
14
and the inner pot
12
are made of a heat-endurable material, such as polyurethane or polyester, and equally spaced in a contained angle of 120 degrees in a plane defined by the casing
14
and the inner pot
12
and fixed by bolts
181
.
Moreover, three units of the supporting means
24
are equally distributed between the inner pot
12
and the pot base
26
in a contained angle of 120 degrees, and staggeringly positioned relative to the heat insulators
18
, wherein each of the supporting means
24
comprises an insulation portion
242
and a root portion
243
(shown in FIG.
3
), wherein the insulation portion
242
located on top of the root portion
243
is the portion that contacts the inner pot
12
, and the root portion
243
is located between two protruding pieces
261
of the pot base
26
and retained to the pot base
26
by a bolt
262
; and, a bolt stud
241
is used to fix the inner pot
12
on the supporting means
24
.
In this invention, a triple-point support of the heat insulator
18
is adopted to obtain equilibrium and save material in comparison with an annular disposition in the conventional electrothermal cooker mentioned above.
Although, this invention has been described in terms of preferred embodiments, it is apparent that numerous variations and modifications may be made without departing from the true spirit and scope thereof, as set forth in the following claims.
Claims
- 1. An electrothermal cooker, comprising: a casing, a cover, an inner pot, a heating means, and a pot base, characterized in: a plurality of heat insulators and supporting means disposed between the casing and the inner pot, and between the pot base and the inner pot respectively.
- 2. The electrothermal cooker according to claim 1, wherein three pieces of the heat insulator are disposed between the casing and the inner pot and distributed equally in a contained angle of 120 degrees.
- 3. The electrothermal cooker according to claim 1, wherein three units of the supporting means are disposed between the inner pot and the pot base and distributed equally in a contained angle of 120 degrees.
- 4. The electrothermal cooker according to claim 1, wherein the heat insulators and the supporting means are positioned staggeringly.
- 5. The electrothermal cooker according to claim 2, wherein the heat insulators and the supporting means are positioned staggeringly.
- 6. The electrothermal cooker according to claim 3, wherein the heat insulators and the supporting means are positioned staggeringly.
- 7. The electrothermal cooker according to claim 1, wherein the heat insulator is made of polyurethane or polyester.
US Referenced Citations (14)