Electric cooking appliance and working method

Abstract

The present invention relates to an electric stove, comprising a chassis, a heating plate, and a panel. The chassis also includes a thermal insulation member and a drive mechanism for rotating the thermal insulation member. The thermal insulation member is located above the heating plate. The heating plate includes a plate body and a heater. The plate body is provided with multiple heating zones spaced circumferentially. The heaters are disposed within the heating zones. The thermal insulation member changes the area covered by the heating zones based on the rotation of the drive mechanism. When the electric stove operates with a fixed power for the heating coil, it can also achieve stepless regulation of the heating power and expand the lower limit of the heating power. The present invention also relates to an operating method for the electric stove. During operation, the required drive rotation angle of the thermal insulation member is calculated based on the actual required heating power W, the fixed heating power W1 provided by the heating plate, and the thermal insulation power W2 corresponding to the area covered by the thermal insulation member per unit rotation angle.

Description

Technical Field

[0001] The present invention relates to an electric heating cooker and also relates to a working method of the electric heating cooker. Background Art

[0002] Cookers are primarily categorized as gas stoves and electric stoves based on their energy sources. Electric stoves are safe and convenient to use because they don't require an external gas connection. Existing electric stoves typically use a heating plate, which is fixed inside the stove and heats pots placed above the plate for cooking. To provide varying heating power, existing electric stoves are equipped with at least two sets of heating coils, selecting which heating coil to use depending on the heating power. For example, the Chinese utility model patent "A Multi-coil Induction Cooker Heating Plate" with authorization publication number CN201616927U (application number 201020026176.1) discloses a heating plate comprising a coil plate, a coil, and a radial magnetic strip. The coil plate comprises a main coil plate and at least one auxiliary coil plate, which are stacked, with the main coil plate having a larger diameter than the auxiliary coil plate. The main coil plate has a main spiral groove on its upper end surface and a main embedded groove on its lower end surface. The auxiliary coil plate has a secondary spiral groove on its upper end surface. The coils comprise a main coil and at least one auxiliary coil, with the main coil embedded in the main spiral groove and the auxiliary coil embedded in the auxiliary spiral groove. The radial magnetic strip is fixed in the main embedded groove. When high-power coil operation is required, the control device of the induction cooker is operated to activate the main coil. When the bottom area of the heated object is small and low-power heating is required, the auxiliary coil is selected for operation. Different coils can be selected for operation as needed to achieve the purpose of selecting different temperatures. However, the heating power of the main and auxiliary coils is fixed when they are in operation, so the induction cooker can only adjust the heating power level based on the heating power when the main and auxiliary coils are turned on, and cannot achieve stepless adjustment of the heating power. In addition, for some special cooking methods, the required heating power is much lower than the heating power of the coils, making it difficult to expand the lower limit of the heating power of existing heating cooktops. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide an electric stove based on the above-mentioned prior art, which can realize stepless adjustment of heating power when the heating coil operates at a fixed power and can also expand the lower limit of heating power.

[0004] The first technical problem to be solved by the present invention is to provide a working method of the aforementioned electric heating cooker in view of the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an electric cooking appliance, comprising a chassis, a heating plate arranged in the chassis, and a panel covering the chassis, characterized in that: a heat insulating member and a driving mechanism for driving the heat insulating member to rotate are further provided in the chassis, and the heat insulating member is located above the heating plate;

[0006] The heating plate includes a plate body and a heating body. A plurality of heating zones are arranged on the plate body at intervals along the circumferential direction. The heating body is arranged in the heating zones. The heat insulating member changes the area covered by the heating zones based on the driving rotation of the driving mechanism.

[0007] In order to more conveniently realize the rotation control of the heat insulation member, a plurality of fan-shaped heating zones are evenly and spaced apart along the circumference of the disk, and fan-shaped gap zones are formed between adjacent heating zones;

[0008] The heat insulating member comprises a plurality of fan blades uniformly arranged and connected along the circumferential direction, the shape of the fan blades matches the shape of the gap area, and the driving mechanism drives the heat insulating member to rotate to change the area covered by the heating area.

[0009] Preferably, the number of the gap regions is N times the number of the fan blades, N is a positive integer, and the area of the gap regions is less than or equal to the area of the heating region.

[0010] The structure is simple. The driving mechanism is a motor, which is arranged below the heating plate. The driving end of the motor is connected to the heat insulation component through a connecting shaft passing through the center of the heating plate.

[0011] In order to better determine the actual heating power required, a weighing sensor for detecting the weight of the pot on the panel is further provided in the chassis, and the weighing sensor is against the lower surface of the panel.

[0012] Preferably, the weighing sensor is arranged above the center of the thermal insulation component.

[0013] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a working method of the electric heating cooker as described above, characterized in that: the initial position of the thermal insulation member is the position where the fan blades cover the gap area; when in use, based on the required actual heating power W, the fixed heating power W1 provided by the heating plate, and the thermal insulation power W2 corresponding to the coverage area of the thermal insulation member per unit rotation angle, the required driving rotation angle R = (W1-W) / W2 of the thermal insulation member is calculated, and then the driving mechanism drives the thermal insulation member to rotate relative to the initial position according to the driving rotation angle R.

[0014] Preferably, W1=k*W0, where k is a positive integer and W0 is the unit heating power adjustment value of the heating plate;

[0015] According to the actual required heating power W, k=[W / W0]+1 is calculated, where [] is a rounding symbol, and the fixed heating power W1 provided by the heating disk is calculated according to k.

[0016] In order to determine the actual heating power more accurately, a weighing sensor for detecting the weight of the pot on the panel is further provided in the chassis, and the weighing sensor is against the lower surface of the panel;

[0017] The actual heating power W required is determined based on the weight G of the food on the panel detected by the weighing sensor.

[0018] Preferably, the user uses a cookware with a standard weight G0, the weighing module detects the weight G1 of the item on the panel, and calculates the weight of the cooking item on the panel G=G1-G0; or

[0019] The user places an empty pot without any cooking materials on the panel. The weighing module detects and obtains the weight data G2 of the empty pot. After the user places cooking materials in the pot, the user places the pot on the panel again. The weighing module detects and obtains the weight of the pot with cooking materials as G3. The weight of the cooking materials on the panel is calculated as G=G3-G2.

[0020] Compared with existing technologies, the present invention offers the following advantages: the electric cooker includes an additional rotatable insulation member above the heating plate. Rotation of the insulation member changes the coverage area of the heating zone, enabling infinite adjustment of the heating power without changing the heating plate's power. In particular, when a heating power requirement is less than the minimum heating plate power, this can be achieved by covering the heating zone with the insulation member. This effectively extends the practical lower limit of heating power, making it adaptable to specific heating power requirements, broadening its application range, and making it more convenient and user-friendly.

[0021] The working method of the electric stove is conducive to controlling the rotation of the heat insulation component and is more intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the electric cooking appliance in an embodiment of the present invention.

[0023] Figure 2 It is a three-dimensional exploded view of the electric cooking appliance in an embodiment of the present invention.

[0024] Figure 3 This is an assembly diagram of the heating plate, thermal insulation, and weighing sensor in an embodiment of the present invention.

[0025] Figure 4 for Figure 3 Another perspective of the picture. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 4 As shown, the electric cooking appliance in this embodiment includes a chassis 1, a heating plate 2 arranged in the chassis 1, and a panel 3 covering the chassis 1. The chassis 1 is also provided with a heat insulating member 4 and a driving mechanism 5 for driving the heat insulating member 4 to rotate.

[0028] Specifically, the heating plate 2 includes a plate body 21 and a heating body 22. A plurality of heating zones 211 are arranged circumferentially on the plate body 21. The heating body 22 is arranged in the heating zone 211. The heating body 22 can be arranged in various forms on the heating zone 211, such as using multiple arc-shaped heating coils or multiple circular heating coils.

[0029] The thermal insulator 4 is positioned above the heating plate 2. The area covered by the heating zone 211 changes as the drive mechanism 5 rotates. The thermal insulator 4 can be made from a variety of existing thermal insulation materials. By varying the coverage area of the heating zone 211, the heat generated by the covered portion of the heating element 22 is not effectively transferred upward to the panel 3, thereby reducing the heating power. Multiple tests were conducted during the early stages of product development to determine the heating power per unit area covered by the thermal insulator 4, which facilitated the activation of the drive mechanism 5.

[0030] In order to facilitate the determination of the driving parameters of the thermal insulation member 4 by the driving mechanism 5, in this embodiment, a plurality of fan-shaped heating zones 211 are evenly and spaced apart along the circumference on the disk body 21, and fan-shaped gap zones 212 are formed between adjacent heating zones 211. The thermal insulation member 4 then correspondingly includes a plurality of fan blades evenly arranged and connected along the circumference, and the shape of the fan blades matches the shape of the gap zones 212, thereby making it easier to expose all the heating zones 211. The driving mechanism 5 drives the thermal insulation member 4 to rotate and change the area of the covered heating zone 211. In this way, during product development and experimental testing, the thermal insulation power corresponding to the coverage area per unit rotation angle of the thermal insulation member 4 can be directly tested, so that the drive control of the thermal insulation member 4 is more convenient based on this parameter.

[0031] Different stoves, based on the desired power adjustment amount, specifically set the relationship between the gap area 212 and the number of fan blades, as well as the relationship between the area of the gap area 212 and the area of the heating zone 211. The number of gap areas 212 is N times the number of fan blades, where N is a positive integer, and the area of the gap area 212 is less than or equal to the area of the heating zone 211. If only half of the fixed output power of the heating plate 2 is required, the number of gap areas 212 can be set to twice the number of fan blades, and the area of the gap area 212 can be set equal to the area of the heating zone 211. In this way, when all fan blades cover the heating zone 211, they only cover half of the area of the heating zone 211 on the heating plate 2, and the fixed power is halved. Based on the adjustment of the fan blade coverage area, the fixed power can be adjusted to half the range. Alternatively, the number of gap areas 212 is equal to the number of fan blades, and the area of the gap area 212 is set to half of the heating area 211, and the area of the corresponding fan blades is also half of the area of the heating area 211. In this way, when all the fan blades cover the heating area 211, the fixed power can also be halved.

[0032] In this embodiment, the number of gap regions 212 is set to twice the number of fan blades, and the area of the gap regions 212 is equal to the area of the heating region 211, thereby achieving stepless power regulation within half the fixed power range. Of course, the number of gap regions 212 can also be set to be equal to the number of fan blades, and the area of the gap regions 212 is equal to the area of the heating region 211. In this way, stepless power regulation within the full fixed power range can be achieved. Even if the fixed power of the heating plate 2 is stepped, stepless regulation within the full power range of the heating plate 2 can be achieved. In addition, stepless regulation within the minimum power range of the heating plate 2 can be achieved, and the lower limit of the heating power provided by the extended heating plate 2 can be provided.

[0033] The driving mechanism 5 in this embodiment is a motor, which is arranged below the heating plate 2 , and the driving end of the motor is connected to the thermal insulation member 4 via a connecting shaft passing through the center of the heating plate 2 .

[0034] In addition, a weighing sensor 7 for detecting the weight of the pot on the panel 3 is provided in the chassis 1, and the weighing sensor 7 is against the lower surface of the panel 3. Specifically, the weighing sensor 7 is arranged above the center of the heat insulating member 4.

[0035] The working method of the above-mentioned electric heating cooker is as follows: the initial position of the thermal insulation member 4 is the position where the fan blades cover the gap area 212; when in use, based on the required actual heating power W, the fixed heating power W1 provided by the heating plate 2, and the thermal insulation power W2 corresponding to the coverage area per unit rotation angle of the thermal insulation member 4, the required driving rotation angle R = (W1-W) / W2 of the thermal insulation member 4 is calculated, and then the driving mechanism 5 drives the thermal insulation member 4 to rotate relative to the initial position according to the driving rotation angle R.

[0036] In this embodiment, W1 = k*W0, where k is a positive integer and W0 is the unit heating power adjustment value of the heating plate 2. Thus, step-by-step power adjustment of the heating plate 2 can be achieved based on W0. The specific power adjustment range is determined based on the structural characteristics of the fan blades, gap area 212, and heating area 211. Thus, the thermal insulation member 4 can achieve stepless power adjustment within the allowable power adjustment range of k*W.

[0037] Based on the actual required heating power W, k is calculated as [W / W0]+1, where [] represents a rounding symbol. Based on k, the fixed heating power W1 provided by the heating plate 2 is calculated. For example, when W / W0=0.7, [W / W0]=0; and for example, when W / W0=1.4, [W / W0]=1.

[0038] In this embodiment, the actual heating power W required is determined based on the weight G of the food on the panel 3 detected by the weighing sensor 7. Specifically, the weight G of the food on the panel 3 can be obtained in the following two ways.

[0039] One method is: the user uses a cookware with a standard weight G0, the weighing module detects the weight G1 of the item on the panel 3, and calculates the weight of the cooked item on the panel 3 as G=G1-G0.

[0040] Another method is: the user places an empty pot without cooking food on the panel 3, and the weighing module detects and obtains the weight data G2 of the empty pot. After the user places cooking food in the pot, the weighing module detects and obtains the weight of the pot with cooking food as G3, and calculates the weight of the cooking food on the panel 3 as G=G3-G2.

[0041] During use, the actual heating power W can be calculated based on the change in the weight G of the food on the panel 3, and then the fixed heating power W1 of the heating plate 2 and the driving angle of the insulation 4 can be adjusted based on the actual heating power W.

[0042] In order to facilitate the realization of intelligent control, a control circuit board can be provided in the chassis 1 to be electrically connected to the driving mechanism 5 and the weighing sensor 7 respectively, so as to realize the coordinated operation of the two.

[0043] The electric cooking appliance of the present invention features an additional rotatable thermal insulator 4 positioned above the heating plate 2. Rotation of the thermal insulator 4 changes the coverage area of the heating zone 211, enabling infinite adjustment of the heating power without changing the heating power of the heating plate 2. In particular, when a heating power lower than the minimum heating power of the heating plate 2 is required, the thermal insulator 4 covering the heating zone 211 effectively extends the practical lower limit of the heating power, making it suitable for specific heating power requirements, extending its application range, and enhancing convenience and user-friendliness.

[0044] The working method of the electric stove is conducive to controlling the rotation of the heat insulating member 4 and is more intelligent.

[0045] In the present specification and claims, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Because the embodiments disclosed herein can be arranged in various orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An electric cooking appliance comprising a chassis (1), a heating plate (2) disposed in the chassis (1), and a panel (3) covering the chassis (1), characterized in that: A heat insulating member (4) and a driving mechanism (5) for driving the heat insulating member (4) to rotate are also provided in the chassis (1), and the heat insulating member (4) is located above the heating plate (2); The heating disk (2) comprises a disk body (21) and a heating body (22); a plurality of heating zones (211) are arranged on the disk body (21) at intervals along the circumferential direction; the heating body (22) is arranged in the heating zones (211); and the heat insulating member (4) changes the area of the heating zones (211) covered by the heat insulating member (4) based on the driving rotation of the driving mechanism (5); The disk (21) is provided with a plurality of fan-shaped heating zones (211) evenly and at intervals along the circumferential direction, and fan-shaped gap zones (212) are formed between adjacent heating zones (211); The heat insulating member (4) comprises a plurality of blades uniformly arranged and connected along the circumference, wherein the shape of the blades matches the shape of the gap area (212).

2. The electric cooking appliance according to claim 1, characterized in that: The number of the gap regions (212) is N times the number of the fan blades, where N is a positive integer, and the area of the gap regions (212) is less than or equal to the area of the heating region (211).

3. The electric cooking appliance according to claim 1 or 2, characterized in that: The driving mechanism (5) is a motor, which is arranged below the heating plate (2). The driving end of the motor is connected to the heat insulating member (4) via a connecting shaft passing through the center of the heating plate (2).

4. The electric heating cooker according to claim 1 or 2, characterized in that: A weighing sensor (7) for detecting the weight of the pot on the panel (3) is also provided in the chassis (1), and the weighing sensor (7) is against the lower surface of the panel (3).

5. The electric cooking appliance according to claim 4, characterized in that: The weighing sensor (7) is arranged above the center of the heat insulation component (4).

6. An operating method of the electric cooking appliance according to any one of claims 1 to 5, characterized in that: The initial position of the heat insulating member (4) is the position where the fan blades cover the gap area (212); when in use, based on the required actual heating power W, the fixed heating power W1 provided by the heating plate (2), and the heat insulating power W2 corresponding to the coverage area per unit rotation angle of the heat insulating member (4), the required driving rotation angle R=(W1-W) / W2 of the heat insulating member (4) is calculated, and then the driving mechanism (5) drives the heat insulating member (4) to rotate relative to the initial position according to the driving rotation angle R.

7. The operating method of the electric cooking appliance according to claim 6, characterized in that: W1=k*W0, where k is a positive integer and W0 is the unit heating power adjustment amount of the heating plate (2); According to the actual required heating power W, k=[W / W0]+1 is calculated, where [] is a rounding symbol, and the fixed heating power W1 provided by the heating plate (2) is calculated according to k.

8. The operating method of the electric cooking appliance according to claim 6, characterized in that: A weighing sensor (7) for detecting the weight of the pot on the panel (3) is also provided in the chassis (1), and the weighing sensor (7) is against the lower surface of the panel (3); The actual heating power W required is determined based on the weight G of the cooking object on the panel (3) detected by the weighing sensor (7).

9. The operating method of the electric cooking appliance according to claim 8, characterized in that: The user uses a cookware with a standard weight G0, and the weighing module detects the weight G1 of the item on the panel (3), and calculates the weight of the cooking item on the panel (3) G= G1-G0; or The user places an empty pot without any cooking materials on the panel (3), and the weighing module detects and obtains the weight data G2 of the empty pot. After the user places cooking materials in the pot, the user places the pot on the panel (3), and the weighing module detects and obtains the weight G3 of the pot with cooking materials. The weight of the cooking materials on the panel (3) is calculated as G=G3-G2.

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