CN217408509U - Electric cooker - Google Patents

Abstract

The utility model discloses an electric cooker, which comprises a cooker body, a shell, a strip-shaped electric heating body and an aluminum plate; the shell is positioned outside the pot body, and the electric heating body and the aluminum plate are positioned between the bottom surface of the pot body and the shell; aluminum plate fixes under the bottom surface, electric heat-generating body fixes the lower surface at aluminum plate, pot body bottom surface edge is kept away from at least partial edge of aluminum plate, and is close to electric heat-generating body. Make aluminum plate's at least partial edge keep away from pot body bottom surface edge, and be close to electric heat-generating body can reduce aluminum plate upper surface edge and braze and the stress concentration that aluminum plate lower surface brazed and cause, reduces aluminum plate and warp, and then when guaranteeing the quality of brazing, avoids aluminum plate to warp and influences pot body bottom quality, improves the electric pot performance. The utility model discloses the people think that electric heat-generating body, aluminum plate and the pot body are fixed through brazing, make the bottom surface that the aluminum plate part covered the pot body, do not influence heat transfer or conduction, are enough to guarantee the thermal efficiency of electric pot.

Description

Electric cooker

Technical Field

The utility model relates to a life electrical apparatus, in particular to an electric cooker.

Background

Electric cookers, also known as electric cookers, have become a common, clean, consumer appliance.

The electric cooker generally comprises a cooker body, an electric heating device and a shell. The pan body is used for contacting food materials to cook the food materials. The electric heating device is used for converting electric energy into heat energy and raising the temperature of the pot body. The shell is positioned outside the pot body to integrally support the electric pot on the table top, and simultaneously, the dissipation of internal heat is reduced, and scalding or burning is reduced or avoided. In order to control the electric heating device, suitable electrical components are also provided in the housing and the electric heating device.

The electric heating apparatus generally includes an electric heating body, and a metal plate to which the electric heating body is mounted and fixed. In order to guarantee heat conduction efficiency, balanced heat conduction homogeneity, avoid the heat to concentrate, reduce or avoid local overheat, compromise the fixed of shell and installation simultaneously, among the prior art, the electric pot bottom generally takes following means:

1. the metal plate is generally an aluminum plate with better heat-conducting property;

2. fixing the electric heating body on the lower surface of the aluminum plate in a brazing mode;

3. fixing the aluminum plate at the bottom of the pot body in a brazing mode;

4. the electric heating elements are arranged on the lower surface of the aluminum plate in a roughly circular arc shape;

5. the electric heating bodies arranged in the circular arc shape are closer to the center of the pot body and keep a proper distance with the edge of the bottom surface of the pot body so as to reserve a heat conducting space and ensure the uniformity of heat transfer.

The above measures of the prior art can ensure the heat efficiency of the electric cooker, but lead to the difficulty of manufacturing and processing. If utilize when brazing with electric heat-generating body, aluminum plate and pot body fixed, though utilize the molten brazing filler metal to fill the contact surface, can avoid welding the seam to cause heat conduction resistance, nevertheless when fixing electric heat-generating body, aluminum plate and pot body together through brazing, aluminum plate upper surface and lower surface all need heat the brazing filler metal and carry out the operation of brazing, and the heating position is different, this just makes aluminum plate produce stress deformation easily, and then leads to the bottom of the pot body to warp, influences the whole quality of electric pot. In the prior art, the adverse effect of the aluminum plate is usually reduced by adjusting the brazing process and parameters, but the brazing defect is easily generated.

Therefore, how to improve the processing manufacturability and ensure the processing quality and reliability while ensuring the heat efficiency of the electric cooker, namely, the quality of the bottom of the cooker body is prevented from being influenced by the deformation of the aluminum plate while ensuring the brazing quality, and the performance of the electric cooker is improved, which is a problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric cooker, when guaranteeing the quality of brazing, avoid aluminum plate to warp and influence pot body bottom quality, improve the electric cooker performance.

The electric cooker provided by the utility model comprises a cooker body, a shell, a strip-shaped electric heating body and an aluminum plate; the shell is positioned outside the pot body, and the electric heating body and the aluminum plate are positioned between the bottom surface of the pot body and the shell; aluminum plate fixes under the bottom surface, electric heat-generating body fixes the lower surface at aluminum plate, pot body bottom surface edge is kept away from at least partial edge of aluminum plate, and is close to electric heat-generating body. Make aluminum plate's at least partial edge keep away from pot body bottom surface edge, and be close to electric heat-generating body can reduce aluminum plate upper surface edge and braze and aluminum plate lower surface and braze the stress concentration that the position difference is too big to cause, reduces aluminum plate and warp, and then when guaranteeing the quality of brazing, avoids aluminum plate to warp the quality that influences pot body bottom, improves the performance of electric pot. Meanwhile, the electric heating body, the aluminum plate and the pot body are fixed through brazing, so that the aluminum plate partially covers the bottom surface of the pot body, heat transfer or conduction is not influenced, and the heat efficiency of the electric pot is ensured.

In a further technical scheme, the aluminum plate forms a welding fixing part, and the edge of the welding fixing part is flush with the edge of the bottom surface and is far away from the electric heating body; and a support threaded column is fixed on the lower surface of the welding fixing part. Therefore, the part for connecting and fixing the shell is formed outside the electric heating body, so that the safety of the electric cooker can be ensured, and the safety and the reliability of the electric cooker can be ensured.

In a further technical scheme, the welding fixing part is provided with a through hole, and the upper end of the threaded column penetrates through the through hole and is supported below the bottom surface. Therefore, on one hand, the reliability of positioning the threaded column can be ensured, and further the reliability of fixing the shell and the pot body is ensured, and on the other hand, the fixing and positioning of the aluminum plate are facilitated.

In a further technical scheme, the bottom surface is circular in outline, and the aluminum plate is square in outline and can be set to be rectangular with a proper length-width ratio according to actual needs. The preferred scheme can be square, so that the cutting of the aluminum plate is convenient, the processing manufacturability is improved, meanwhile, the using amount of aluminum plate raw materials can be reduced, and the cost of the electric cooker is reduced.

In a further technical scheme, four corners of the aluminum plate are flush with the bottom surface, the four corners of the aluminum plate are in arc transition, and the radius of the arc in transition is equal to the radius of the outline of the bottom surface. Therefore, the heating uniformity in the processing (brazing) process can be ensured, the deformation is reduced, and in use, the heat can be conveniently transferred to the circumferential side wall of the pot body, so that the heat efficiency of the electric pot is ensured.

In a further technical scheme, an exhaust groove is formed in the upper surface of the aluminum plate and at least communicated with the center and the edge of the aluminum plate. The exhaust groove can also pass through the center of the aluminum plate and is communicated with two opposite side edges. Therefore, air between the aluminum plate and the pot body can be discharged in the brazing process, and the brazing quality is further ensured.

Drawings

Fig. 1 is a longitudinal sectional view of an electric pot according to an embodiment of the present invention;

FIG. 2 is a bottom view of the electric rice cooker according to the embodiment of the present invention;

fig. 3 is a perspective view of the electric rice cooker provided by the embodiment of the present invention with the outer casing removed;

FIG. 4 is a diagram showing the separation of the pot body, the electric heater 300 and the aluminum plate 400 in the embodiment of the present invention;

fig. 5 is a bottom view of the electric rice cooker of the embodiment of the present invention with the outer casing removed;

FIG. 6-1 is a schematic view showing the principle of division of a square-profile aluminum plate by using 2400X1200 pieces of aluminum plate stock;

FIG. 6-2 is a schematic view showing the principle of division when a round-profile aluminum plate is formed by dividing a whole aluminum plate stock of 2400X 1200;

fig. 7 is a schematic view of the structure of the upper surface of the aluminum plate of the electric cooker in the embodiment of the present invention.

Detailed Description

The embodiments provided by the present invention are described below with reference to the accompanying drawings. In this document, the terms of "upper" and "lower" are used with reference to the use state of the electric cooker; the terms of orientation such as "inside" and "outside" are determined by taking the center line of the electric cooker as a reference.

Referring to fig. 1 to 4, wherein fig. 1 is a longitudinal sectional view of an electric pot according to an embodiment of the present invention; FIG. 2 is a bottom view of the electric rice cooker according to the embodiment of the present invention; fig. 3 is a perspective view of the electric rice cooker provided by the embodiment of the present invention with the outer casing removed; fig. 4 is a diagram showing the pan body, the electric heating element 300 and the aluminum plate 400 separately in the embodiment of the present invention.

The embodiment of the utility model provides an electric cooker includes pot body 100, shell 200, banding electric heat-generating body 300 and aluminum plate 400. The pan body 100 comprises a bottom and surrounding side walls enclosing a cavity with an open upper portion. The lower surface of the bottom of the pan body 100 forms a bottom surface 110 of the pan body, and the contour of the bottom surface 110 is circular. The outer casing 200 is located outside the pot body 100 and covers the peripheral side and the bottom of the pot body 100, on one hand, the outer casing 200 can be supported on a predetermined table surface, on the other hand, the heat loss to the periphery and the lower part can be reduced, meanwhile, an operator is prevented from contacting the pot body 100 with higher temperature and high-temperature parts at the bottom of the pot body 100, and scalding or burning is reduced or avoided.

The electric heating body 300 (inside which the heating wire may be disposed) and the aluminum plate 400 are located between the bottom surface 110 of the pot body 100 and the outer shell 200. Aluminum plate 400 is fixed under bottom surface 110 through brazing, and electric heat-generating body 300 is fixed at aluminum plate 400's lower surface through brazing, and electric heat-generating body 300, aluminum plate 400 and pot body 100 form the structure of fixed linking to each other promptly. The electric heating body 300 has a strip-shaped structure and is arranged in a substantially arc-shaped manner around the center of the pot body so as to concentrate heat around and near the center line of the pot body 100.

As shown in fig. 5, which is a bottom view of the electric rice cooker provided by the embodiment of the present invention with the outer casing removed. In this embodiment, the aluminum plate 400 is a square aluminum plate 400, and four corners of the square aluminum plate 400 are in arc transition, and the radius of the arc transition is equal to the radius of the profile of the bottom surface 110, and the four corners of the arc transition are substantially flush with the edge of the bottom surface 110. Thus, at and near the middle of the four sides of the square, a portion (indicated by S in the figure) is formed away from the edge of the bottom surface 110 of the pan body 100. The edge portion is closer to the electric heating body 300 than the edge distance of the bottom surface 110. Can reduce aluminum plate 400 upper surface edge like this and braze with aluminum plate 400 lower surface position difference of brazing, and then reduce the stress concentration that the brazing in-process caused because the heating position is different, reduce aluminum plate and warp, and then when guaranteeing the quality of brazing, avoid aluminum plate 400 to warp the quality that influences pot body 100 bottoms, improve the electric pot performance. Meanwhile, because the electric heating body 300, the aluminum plate 400 and the pot body 100 are fixed by brazing to form a complete heat conductor, the aluminum plate 400 partially covers the bottom surface 110 of the pot body 100, heat transfer or conduction is not affected, and the heat efficiency of the electric pot is ensured.

Making the aluminum plate 400 profile square can facilitate the cutting of the aluminum plate 400, improve the manufacturing manufacturability, simultaneously can reduce the aluminum plate usage, reduce the cost of the electric cooker, as shown in fig. 6-1 and 6-2, fig. 6-1 is a schematic view of the principle of division when the square profile aluminum plate is formed by dividing the whole aluminum plate stock of 2400X1200, and fig. 6-2 is a schematic view of the principle of division when the circular profile aluminum plate is formed by dividing the whole aluminum plate stock of 2400X 1200. It can be confirmed from the figure that the aluminum plate raw material with the same size can be divided into 128 aluminum plates with square contour, and when the aluminum plate is divided into circular contour, 84 aluminum plates with circular contour can be obtained. From the viewpoint of the cost of the aluminum plate, the cost can be reduced by about 35 percent.

It is understood that aluminum plate 400 may be rectangular with a suitable length/width ratio according to actual needs, or may be shaped accordingly according to the contour of bottom surface 110 of pan body 100.

In this embodiment, four corners of the arc transition of the aluminum plate 400 are flush with the bottom surface 110, so that uniform heating during the processing (brazing) process can be ensured, and deformation is reduced. In use, the heat can be conveniently transferred to the circumferential side wall of the pot body, and the heat efficiency is ensured.

Referring again to fig. 3 and 4, the aluminum plate 400 forms a weld-fixing portion 410 (in the present embodiment, a square-outline four-corner portion forms the weld-fixing portion 410), and the weld-fixing portion 410 protrudes outside the electric heating element 300 arranged in a circular arc shape, and the edge of the portion is flush with the edge of the bottom surface 110 and is away from the electric heating element 300. The lower surface of the welding fixing part 410 is fixed with a supporting threaded column 500. Thus, the plurality of supporting threaded columns 500 are arranged at positions close to the outer edge, namely, on a larger area, so that the pot body 100 of the outer shell 200 is fixed on the larger area, the assembling pulling force of the outer shell 200 is improved, and more stable support is provided; in addition, a part for connecting and fixing the housing is formed outside the electric heating body 300, so that the safety of the electric cooker can be ensured, and the safety and reliability of the electric cooker can be ensured. In this embodiment, the welding fixture 410 may be provided with a through hole through which the upper end of the screw column 500 passes to be supported below the bottom surface 110. The threaded post 500 is provided at a lower end thereof with a threaded hole for fixing the housing 200 with a fastener. The threaded columns are arranged on the welding and fixing parts, so that the reliability of 500 positioning of the threaded columns can be guaranteed, the reliability of fixing the shell 200 and the pot body 100 is guaranteed, and meanwhile, the fixing and positioning of the aluminum plate 300 are facilitated.

Please refer to fig. 7, which is a schematic diagram of the upper surface structure of the aluminum plate of the electric cooker in the embodiment of the present invention. In this embodiment, the upper surface of the aluminum plate 400 is provided with an exhaust groove 401, and the exhaust groove 401 communicates at least the center and the edge of the aluminum plate 400. It is also possible to pass the exhaust groove 401 through the center of the aluminum plate 400 and communicate opposite edges. Therefore, in the brazing process, air between the aluminum plate 400 and the pot body 100 is exhausted, and the phenomenon that air is retained between the aluminum plate 400 and the pot body 100 after brazing to form a welding gap is avoided or reduced, so that the brazing quality is ensured.

It is right above the utility model provides a pan has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (9)

1. An electric cooker comprises a cooker body (100), a shell (200), a strip-shaped electric heating body (300) and an aluminum plate (400); the shell (200) is positioned outside the pot body (100), and the electric heating body (300) and the aluminum plate (400) are positioned between the bottom surface (110) of the pot body (100) and the shell (200); aluminum plate (400) are fixed under bottom surface (110), electric heat-generating body (300) are fixed at aluminum plate (400) lower surface, its characterized in that, the pot body (100) bottom surface edge is kept away from to at least part edge of aluminum plate (400), and is close to electric heat-generating body (300).

2. The electric rice cooker according to claim 1, wherein the aluminum plate (400) forms a welding fixing portion (410), and an edge of the welding fixing portion (410) is flush with an edge of the bottom surface (110) and is away from the electric heating body (300); and a support threaded column (500) is fixed on the lower surface of the welding fixing part (410).

3. Electric cooking pot according to claim 2, characterized in that the welded fastening (410) is provided with a through hole through which the upper end of the threaded stud (500) is supported below the bottom surface (110).

4. The electric rice cooker of claim 1, wherein the bottom surface (110) has a circular profile and the aluminum plate (400) has a square profile.

5. The electric kettle according to claim 4, characterized in that the contour of the aluminum plate (400) is square.

6. The electric cooking pan according to claim 4 or 5, characterized in that the four corners of the aluminum plate (400) are flush with the edges of the bottom surface (110).

7. The electric cooking pan according to claim 6, characterized in that the four corners of the aluminum plate (400) are rounded and the radius of the rounded transition is equal to the radius of the contour of the bottom surface (110).

8. The electric rice cooker of any one of claims 1 to 5, wherein the upper surface of the aluminum plate (400) is provided with a gas discharge groove (401), and the gas discharge groove (401) communicates at least the center and the edge of the aluminum plate (400).

9. The electric rice cooker of claim 8, wherein the exhaust groove (401) passes through the center of the aluminum plate (400) and communicates opposite side edges.

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