JP3094075U - Electric kettle for electromagnetic cooker - Google Patents

Abstract

(57) [Problem] To provide a water heater kettle compatible with an electromagnetic cooker that has high heat generation efficiency and can stably heat even when used for a high-performance electromagnetic induction heater such as a 200 V, 2 kW IH heater. Plan. A plurality of protrusions (4, 5) formed by die pressing are provided concentrically on the bottom of a kettle kettle. Each protruding portion has a rising surface c on the inner peripheral side and a flat surface b
And a rising surface a on the outer peripheral side, and these flat surfaces b
At the same height. The rising surface a of the outermost projection 4
Rises from the lower end of the radius r provided from the side to the bottom of the kettle. The center of the bottom is a recess 6 having no protrusion within a range of 40 to 80 mm in diameter.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a kettle compatible with an electromagnetic cooker.

[0002]

[Prior art]

  In the kettle for boiling water, the bottom has been improved to improve the thermal efficiency against flames. Providing irregularities in the shape of the part has been proposed (Patent Documents 1 and 2).   On the other hand, the spread of electromagnetic cookers using electromagnetic induction heating (IH) in recent homes There are some remarkable types of gas stoves, and many stoves use gas stoves for electromagnetic induction heating. Needless to say that it is changing to B, high performance such as 200V, 2kW IH heater The heaters have also been provided.   However, electromagnetic induction heating is performed by the magnetic field lines generated from the spiral coil. , Eddy currents are generated in metals such as iron and the like, which are coordinated in close proximity, due to the electrical resistance of the metal. Heating is performed by the heat generation. Therefore, in general, a commercial IH stove , It is said that the metal that is more than 4mm away from the top plate does not generate substantial heat. It is said that the larger the area in contact with the top plate, the higher the thermal efficiency. There is. From this point of view, the bottom part t of the kettle is as shown in FIG. 3 and FIG. Than the general bottom part where the whole is depressed toward the center, and those of Patent Documents 1 and 2. It can be said that it is desirable to be flat. However, the bottom of the kettle If it is composed of only flat surfaces, metals such as iron and stainless steel will expand due to heat generation. Therefore, during heating, the bottom part deforms and warps in an arc shape, reducing heat generation efficiency and This will reduce the stability of the kettle.

[Patent Document 1] Utility model registration No. 3017863

[Patent Document 2] Actual Kaihei 5-63423

[0003]

[Problems to be solved by the device]

  The present invention is a high-performance electromagnetic induction heating type such as a 200V, 2kW IH heater. Even when used as a heater, it has high heat generation efficiency and is compatible with electromagnetic cookers that can perform stable heating. It is intended to provide a kettle for boiling water.

[0004]

[Means for Solving the Problems]

  Therefore, the first invention of the present application can be heated by an electromagnetic cooker that uses electromagnetic induction heating. In a hot water kettle, the bottom of the kettle is shaped by die pressing. A plurality of protrusions formed are concentrically provided, and each protrusion rises on the inner circumference side. By providing a flat surface, a flat surface, and a rising surface on the outer peripheral side, the lower end of each protrusion is the bottom. Flat surface protruding from the other surface of the part, and that these flat surfaces have the same height. By providing a kettle that is compatible with an electromagnetic cooker, Is the solution.   In the kettle compatible with the electromagnetic cooker according to the present invention, the kettle A plurality of protrusions formed by die pressing are provided on the bottom of the Each protrusion has an inner peripheral rising surface, a flat surface, and an outer peripheral rising surface. Therefore, the shape of the bottom portion is stable even when heated. In particular, stand on both sides of a flat surface. Since it has a rising surface, it can be flattened by pressing the rising surface with a die. The morphology is stable. The lower end of these is a flat surface protruding from the other surface of the bottom. This flat surface is the same height, so this flat surface is the top plate of the induction cooker. It is in stable contact with the rate and maintains high heat generation efficiency.

[0005]   In the invention according to claim 2 of the present application, the rising surface of the protruding portion at the outermost periphery is the hot water. Start up from the lower end of the rounded part provided from the side to the bottom of the boiling kettle A boiling water kettle compatible with an electromagnetic cooker according to claim 2, characterized in that It is the one that provides the tor. In this kettle, Since the rising surface is raised from the lower end of the rounded part, the kettle The shape of the outer circumference is particularly stable. Especially from the side of the kettle to the bottom In the case where the rounded portion is provided over the The entire bottom is deformed so as to project downward in an arc so that the radius is extended from the lower end. Will end up. On the other hand, the rising surface of the outermost protruding part is Then, by raising it, the entire bottom is lowered so that the radius is extended as in the past. It was possible to prevent deformation such as bowing out.

[0006]   In the invention according to claim 3 of the present application, the radial width of each flat surface is 10 to 25 mm. A kettle compatible with an electromagnetic cooker according to claim 2, characterized in that Since the flat surface can have a sufficient area, The contact area with the plate plate can be sufficient. On the other hand, increase the width of the flat surface If this happens, the deformation of the flat surface will increase when heat is generated and heat generation efficiency will decrease. There is

[0007]   In the invention according to claim 4 of the present application, the height of the rising surface is 1.5 to 3 mm. There is provided an electric kettle compatible with an electromagnetic cooker according to claim 3, It is something. The height of the rising surface is 1.5 mm or more, which prevents deformation. The effect of stopping can be surely exhibited, while the height of the rising surface is 3 mm or less, Even in the concave portion, heat can be generated by the electromagnetic cooker.

[0008]   In the invention according to claim 5 of the present application, the center of the bottom portion of the kettle has a diameter It is a concave portion having no protrusion within the range of 40 to 80 mm. A kettle compatible with an electromagnetic cooker according to claim 4 is provided. The center of the bottom also projects It can be implemented as an exposed flat surface, but the center of the bottom part is deformed by thermal expansion. Is concentrated, and there is a large possibility that the relevant portion will warp and project in an arcuate shape. Because of that By making the center part a concave part, the stability of the kettle will be impaired even if protruding deformation occurs. It can prevent sneezing.

[0009]

[Embodiment of device]

  An embodiment of the present invention will be described below with reference to the drawings.   FIG. 1 is a sectional view of an essential part of a kettle according to an embodiment of the present invention. 2 is a bottom view of the same kettle.

[0010]   This kettle has a main body 1 and a lid 2, and the main body 1 has a handle 3 and a pouring unit. And a slot (not shown). The main body 1 is an electromagnetic induction member such as iron, iron hollow, stainless steel, etc. It can be made of a material capable of conducting heating, and in this example, 0.6 or 0. It is made of stainless steel with a thickness of 7 mm.

[0011]   At the bottom of this kettle, there are multiple strips formed by die pressing. In this example, two protrusions 4 and 5 are concentrically provided, and each protrusion is on the outer peripheral side. A rising surface a, a flat surface b, and a rising surface c on the inner peripheral side. Each protrusion 4 , 5 is a flat surface b protruding from the other surface of the bottom, and these flat surfaces b, b is set to the same height and comes into surface contact with the top plate of the IH stove. This As shown in the figure, the rising surface is provided on both sides of the flat surface. The press work stabilizes the shape of the flat surface.

[0012]   In particular, the rising surface a of the outer protruding portion 4 is provided from the side portion to the bottom portion. It is raised from the lower end of the rounded portion r. This is the traditional It is possible to prevent the entire bottom from protruding downward in a bow shape so that the Wear.

[0013]   The radial width of each flat surface b is preferably 10 to 25 mm. In this example, , The flat surface b of the outer protrusion 4 is 19 mm, and the flat surface b of the inner protrusion 5 is 17 mm. Has been. At the center of the bottom, no protrusion is provided within the range of 40 to 80 mm in diameter. The concave portion (central concave portion 6) has a diameter of 64 mm in this example. Outside The width of the recess (outer peripheral recess 7) between the side protrusion 4 and the inner protrusion 5 is 12 mm. Has been. The widths of these recesses 6 and 7 include the rising surfaces a and c. There are no dimensions. The height of the rising surface (that is, the height of the flat surface b and the height of the recesses 6, 7) The difference) is 1.5 to 3 mm, and is 2.5 mm in this example. Kettle kettle The capacity of the battery is 6.5 liters in this example, but it is 3.5 liters and 4.5 liters. It can be changed appropriately such as liter and 8.5 liter. Also, depending on the overall size, The number of protrusions may be increased or the width of the flat surface may be changed.

[0014]

【Example】

  Regarding the kettle according to the above-mentioned embodiment, the capacity of 6.5 liters, 0. Made of 7 mm thick stainless steel, the diameter of the outer protrusion is 176 mm and the radius of the radius r is 50 mm. As another example, the kettle manufactured as the above numerical value is 200 A heating test was conducted using an IH stove of V and 2 kW. The test method is boiling water 2 liters of water was put in the tor and the time until boiling was measured. With Comparative Example 1 As a comparative example 2, a commercially available product of the same capacity (as shown in FIG. 3) and a commercially available product of the same capacity ( (Shown in FIG. 4) was tested under the same conditions. In Comparative Example 1, The time until boiling was 7 minutes 15 seconds, and in Comparative Example 2 it was 7 minutes 20 seconds. On the other hand, in the embodiment, it is 6 minutes 55 seconds, 200V, 2kW IH stove It was confirmed that the heat generation efficiency was high.

[0015]

[Effect of device]

  According to the invention of claim 1 of the present application, the shape of the bottom is stable even when heated, and The flat surface formed by the protrusion makes stable contact with the top plate of the electromagnetic cooker, By maintaining high heat generation efficiency, high performance such as 200V, 2kW IH heater Noble electromagnetic induction heating type heater has high heat generation efficiency and stable heating It was possible to provide a kettle that is compatible with various electromagnetic cookers.   In the device according to claim 2 of the present application, in addition to the above effects, the outermost protrusion By raising the rising surface of the from the lower end of the radius, To prevent deformation such that the entire bottom projects downward in a bow shape so that the radius is extended. It was able to.   In the device according to claim 3 of the present application, in addition to the above effects, a flat surface is sufficient. Can have an area, and has a sufficient contact area with the top plate On the other hand, even when heat is generated, large deformation of the flat surface is prevented, resulting in low heat generation efficiency. It was able to prevent the bottom.   In the device according to claim 4 of the present application, in addition to the above effects, The effect of preventing deformation can be surely exhibited, and even if it is in the recess, it will not be affected by the electromagnetic cooker. Fever can occur.   In the invention according to claim 5 of the present application, in addition to the above effects, the central portion is recessed. By doing so, it is possible to prevent the stability of the kettle from being impaired even if protruding deformation occurs. Can be stopped.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts of a kettle according to an embodiment of the present invention.

FIG. 2 is a bottom view of the same kettle.

FIG. 3 is a cross-sectional view of essential parts of a conventional kettle for boiling water.

FIG. 4 is a cross-sectional view of a main part of another conventional kettle.

[Explanation of symbols]

1 kettle body 4 Outside protrusion 5 Inner protrusion 6 central recess 7 Outer peripheral recess a Rising surface on the outer peripheral side b Flat surface c Rising surface on the inner circumference side r are section

Claims (5)

[Scope of utility model registration request] 1. A kettle that can be heated by an electromagnetic cooker using electromagnetic induction heating, wherein a plurality of protrusions formed by die pressing are concentrically provided on the bottom of the kettle. Since the protrusion has the rising surface on the inner peripheral side, the flat surface, and the rising surface on the outer peripheral side, the lower end of each protruding portion is a flat surface protruding from the other surface of the bottom portion, and these flat surfaces have the same height. A kettle compatible with an electromagnetic cooker, characterized by being 2. The electromagnetic wave according to claim 1, wherein the rising surface of the projecting portion at the outermost periphery is raised from the lower end of the rounded portion provided from the side portion to the bottom portion of the kettle. A kettle for cooking equipment. 3. A water heating kettle for an electromagnetic cooker according to claim 2, wherein each flat surface has a radial width of 10 to 25 mm. 4. The kettle compatible with an electromagnetic cooker according to claim 3, wherein the height of the rising surface is 1.5 to 3 mm. 5. The center of the bottom of the kettle has a diameter of 4 mm.
The kettle for an electromagnetic cooker according to claim 4, wherein the kettle is a recess having no protrusion in the range of 0 to 80 mm.