Cooking utensil capable of measuring and controlling temperature of electric hot tray

Abstract

The utility model discloses a cooking utensil capable of measuring and controlling the temperature of an electric hot tray, which is characterized by comprising a utensil, a utensil body, a control panel, the electric hot tray and a temperature sensor, the cooking utensil is specifically a main body of the cooking utensil and comprises a shell, a power line, a control panel, an electric hot tray, a temperature sensor and a wire used for electrically connecting electric devices. The electric heating plate comprises a conducting layer abutting against the vessel, a tray provided with an installation support and an electric heating layer arranged between the conducting layer and the tray and provided with an electrical connection port. The free end of the temperature sensor is electrically connected with the control panel, the working end of the temperature sensor abuts against a conducting layer of the electric hot tray, and the temperature sensor collects temperature data of the electric hot tray through the Seebeck effect. The electric hot tray has the beneficial effects that the cooking temperature of the electric hot tray can be increased, the cooking time can be shortened, and the cooking temperature of the electric hot tray can be controlled and adjusted without stage difference.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooking equipment, in particular to an electric heating cooking appliance which controls the cooking state by controlling and adjusting the temperature of the electric heating plate through a control panel after the temperature of the electric heating plate is collected by a hot electrode. BACKGROUND

[0002] The existing electric heating cooking appliance (referred to as cooking appliance) controls the cooking state mainly by using a thermistor temperature sensor to detect the temperature change of the utensil (container) during cooking, and then using a control panel to control the power on-off of the electric heating plate or adjust the power size of the electric heating plate to achieve the control. Even when the temperature of the electric heating plate is detected, it is only limited to the anti-empty burning and / or anti-dry burning protection of the cooking appliance. Therefore, when the utensil has a large contact area with the electric heating plate and the utensil contains little food, the cooking state will have problems such as spilling or sticking to the bottom. When the utensil has a small contact area with the electric heating plate and the utensil contains a lot of food, the cooking state will have problems such as insufficient boiling or not boiling. Moreover, when different materials are used for utensils on the same appliance (main machine), the cooking function will be partially or completely disabled due to the different thermal conductivity coefficients of the materials, especially when the utensil is made of non-metallic materials, the problem will be magnified. On the other hand, since the detection temperature of the thermistor is low (generally below 200℃), it cannot be directly used as a temperature detection device for the electric heating plate. At the same time, since the thermistor needs to be wrapped layer by layer, there is a serious lag in temperature detection. Even if it is indirectly used for anti-empty burning and / or anti-dry burning protection of the cooking appliance, there is still a risk of deformation and collapse of the electric heating plate due to high temperature, damage to the thermistor, etc.

[0003] A sudden jump type temperature controller directly installed at the bottom of the electric heating plate and using the on-off characteristics of memory metal with a maximum disconnection temperature generally below 300℃. Since a temperature controller only has one pair of fixed temperature on-off control points, the purpose of using it to control the temperature of the electric heating plate is mainly as an over-temperature protection for the cooking appliance or as an auxiliary device for implementing certain special functions (such as heat preservation of a magnetic steel rice cooker). SUMMARY

[0004] The present application aims to collect the temperature of the electric heating plate in real time, quickly and accurately by the method of abutting the working end of the hot electrode with the conduction layer of the electric heating plate, and then use the electronic devices on the control panel to control and adjust the temperature of the electric heating plate according to the changes of the cooking state, so as to control the cooking state. This method at least solves one problem of the method of controlling the cooking state by controlling the power on-off of the electric heating plate or adjusting the power size of the electric heating plate.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is a cooking appliance for measuring and controlling the temperature of an electric heating plate, characterized in that it comprises:

[0006] The utensil is a device for holding and heating food for cooking, which is freely placed on the electric heating plate.

[0007] The appliance is the main body of the cooking appliance, which comprises a shell, a power cord, a control board, an electric heating plate, a temperature sensor, and wires for electrical connection between the electrical devices.

[0008] The electric heating plate comprises a conductive layer in contact with the utensil, a tray provided with mounting brackets, and an electric heating layer provided between the conductive layer and the tray and provided with an electrical connection port.

[0009] The temperature sensor is a thermoelectric element with a free end electrically connected to the control board and a working end in contact with the conductive layer of the electric heating plate, which collects temperature data of the electric heating plate by using the Seebeck effect.

[0010] Further, the cooking appliance for measuring and controlling the temperature of the electric heating plate is characterized in that the utensil is a device for holding and heating food, which is freely placed on the electric heating plate and made of metal or non-metal material, in the shape of a circular, square, or oval dish or barrel.

[0011] Further, the cooking appliance for measuring and controlling the temperature of the electric heating plate is characterized in that the appliance is the main body of the cooking appliance, which comprises a shell made of one or more components for decoration, installation, and protection of the internal devices of the appliance, a power cord for importing working power, a control board, an electric heating plate, a temperature sensor, and wires for electrical connection between the electrical devices.

[0012] Further, the cooking appliance for measuring and controlling the temperature of the electric heating plate is characterized in that the control board is one or more, which comprises a PCB board, an IC chip programmed with a cooking program, electronic devices for controlling the on-off of large current, and other electronic components, and an electrical module with human-computer interaction, display, detection, and control functions.

[0013] Further, the cooking appliance for measuring and controlling the temperature of the electric heating plate is characterized in that the electric heating plate is a circular, square, or oval electric heating device in the shape of a flat plate or a concave-convex plate, which comprises a conductive layer made of metal material, a tray made of metal or non-metal material, an electric heating layer provided between the conductive layer and the tray and provided with an electrical connection port, and a plurality of independent mounting brackets provided on the tray, or a plurality of mounting protrusions, mounting holes, or mounting columns integrally formed with the tray.

[0014] Further, the cooking utensil for measuring and controlling the temperature of the electric hot plate has the features that the temperature sensor is a working end or a working end arranged on the transition piece, and is directly or indirectly abutted with the conductive layer of the electric hot plate by welding, screwing, clamping or elastic mounting, and is externally provided with one or more protective pieces, and the free end is provided with an electrical connection port and / or a S, R, B, N, E, T, J, K type thermoelectric electrode.

[0015] The present application has the advantages that the thermoelectric electrode temperature sensor detects the high temperature, the working end is abutted with the conductive layer of the electric hot plate, the technical scheme of quickly and accurately collecting the temperature of the electric hot plate, not only can improve the cooking temperature of the electric hot plate and shorten the cooking time, but also can realize stepless difference control and adjustment of the cooking temperature of the electric hot plate, thereby effectively solving the problems of the cooking control method of controlling the on-off of the power supply of the electric hot plate or adjusting the power size of the electric hot plate when cooking different vessels, different capacities and different foods. The remaining effects will be partially given in the following description, partially become obvious through the following description, or be understood from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a cross-sectional schematic view of the working end of the embodiment abutting at the vertical edge of the middle flange hole of the conductive layer;

[0017] Figure 2 is a cross-sectional schematic view of the working end of the embodiment abutting at the outside flange of the conductive layer;

[0018] Figure 3 is a cross-sectional schematic view of the working end of the embodiment abutting at the bottom surface of the conductive layer;

[0019] Figure 4 is an axonometric exploded schematic view of the flat plate electric hot plate of the embodiment;

[0020] Figure 5 is a cross-sectional schematic view of the flat plate electric hot plate of the embodiment;

[0021] Figure 6 is an axonometric schematic view of the temperature sensor of the embodiment.

[0022] Reference signs: 100. utensil; 200. vessel; 1. control panel; 2. electric hot plate; 21. conductive layer; 22. electric heating layer; 22A. electrical port; 23. tray; 23A. mounting bracket; 3. temperature sensor; 31. working end; 32. free end. DETAILED DESCRIPTION

[0023] Embodiments of the present application will be described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, the described embodiments are exemplary, wherein similar reference numerals represent the same or similar devices, or devices with the same or similar functions, and the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0024] The description of the present application involves conceptual explanation. Electrical connection: refers to the collection of all electrical circuits in electrical products, including power connection components such as power plugs, power terminals, power cords, internal wires, internal connection components, etc., and electrical connection in a narrow sense refers to all ways of connecting different conductors inside the product; Abutment: "abut" means to squeeze, push, top, and press, "connect" means to connect, "abutment" means that the force generated in different ways squeezes, pushes, tops, and presses two or more devices to form an effective fixed or movable connection. Therefore, for those skilled in the art, the meanings of the above-mentioned nouns and terms in the present application can be understood according to the specific circumstances.

[0025] Reference will be made below to Figures 1 to 6 A cooking appliance for measuring and controlling the temperature of an electric heating plate is described.

[0026] The technical solution of the present application is a cooking appliance for measuring and controlling the temperature of an electric heating plate, characterized in that it comprises:

[0027] Vessel, the vessel is placed on the electric heating plate and can be freely taken and placed, and is used to cook food by containing and heating the food; further, the vessel is made of metal or non-metal material, and is a disc-shaped or barrel-shaped device in a circular, square or oval shape, and the reduction of the vessel cannot be used as a necessary technical feature to avoid the technical solution.

[0028] The electric appliance is a main body of a cooking appliance, and comprises a shell, a power cord, a control board, an electric heating disc, a temperature sensor, and wires for electrical connection between the electric appliances; further, the shell is a component made of metal or non-metal for decorating the appearance of the appliance, installing, and protecting the internal components of the electric appliance, and is a general term for components including a base, an upper shell, a panel, a decoration, and the like; the power cord is a general component for leading in working power; the control board is one or more boards comprising a PCB, an IC chip programmed with a cooking program, electronic components for controlling the on-off of large current, and other electronic components, and is a general term for electrical components including a main board, a display board, a function board, and the like.

[0029] The electric heating disc comprises a conductive layer abutting against a vessel, a tray provided with mounting brackets, and an electric heating layer provided between the conductive layer and the tray and provided with an electrical connection port; further, the electric heating disc is a circular, square, or oval electric heating component in the form of a flat plate or a concave-convex plate, and comprises a conductive layer made of metal material, a tray made of metal or non-metal material, an electric heating layer provided between the conductive layer and the tray and provided with an electrical connection port and made of one or more electrically insulating components and resistance heating components, and a plurality of independent mounting brackets provided on the tray, or a plurality of mounting protrusions, mounting holes, or mounting columns integrally formed with the tray.

[0030] The temperature sensor is a thermoelectric element with a free end electrically connected to the control board and a working end abutting against the conductive layer of the electric heating disc to collect temperature data of the electric heating disc by using the Seebeck effect; further, the temperature sensor is a working end or a working end provided on a transition component, directly or indirectly abutting against the conductive layer of the electric heating disc by using welding, screws, clamping, or elastic mounting, provided with one or more protective components on the outside, and provided with an electrical connection port and / or wires on the free end, and is an S, R, B, N, E, T, J, or K type thermoelectric element; and the transition component is a component made of a material with good thermal conductivity and having an attractive appearance and facilitating good abutment of the working end of the thermoelectric element against the conductive layer of the electric heating disc, and the protective component is an insulating and / or shielding component for preventing the working end of the thermoelectric element from being touched, such as a silica gel tube, a glass fiber tube, a ceramic tube, a mica tube, and the like.

[0031] The following Figures 1 to 6 The application further discloses a cooking appliance for measuring and controlling the temperature of the electric heating disc.

[0032] As Figure 1 , Figure 4 , Figure 5 , Figure 6The cooking utensil for measuring and controlling the temperature of the electric heating disc is characterized by comprising a vessel, a control panel, an electric heating disc and a temperature sensor. The vessel is placed on the electric heating disc and abuts against the conductive layer of the electric heating disc, and is made of metal or non-metal material and in the shape of a circular or square or oval barrel-shaped container. The electric heating disc comprises a conductive layer which supports the vessel and abuts against the bottom of the vessel, conducts heat to the vessel, is made of metal material, has a flange on the outer side and a flange hole in the middle, and is provided with a plurality of independent mounting supports for mounting and fixing the electric heating disc on the shell or mounting other devices on the electric heating disc, a tray made of metal or non-metal material, and an electric heating layer which is made of one or more electrically insulating parts (such as mica, resin, asbestos, etc.) and a resistance heating part (such as a heating wire or a heating film), has an electrical connection port (such as a terminal lug or a plug), and has excellent electrical insulation performance. The temperature sensor is a working end or a working end provided on a transition piece, elastically abuts against the vertical edge of the flange hole in the middle of the conductive layer, and has a free end provided with an electrical connection port and electrically connected to the control panel.

[0033] Further, since the detection temperature of the thermoelectric electrode temperature sensor is much higher than that of the thermistor temperature sensor and the snap-action temperature sensor, and the working end or the working end provided on the transition piece elastically abuts against the vertical edge of the flange hole in the middle of the conductive layer of the electric heating disc and the free end is connected to the control panel through the electrical connection port, the control panel can collect the temperature data of the electric heating disc in real time, quickly and accurately. Therefore, on the one hand, the cooking temperature of the electric heating disc can be greatly improved and the cooking time can be shortened under the condition of ensuring the safety of the utensil, such as increasing the cooking temperature of the traditional electric heating disc below 300° to above 300° or higher; on the other hand, since the real-time temperature of the electric heating disc can be quickly and accurately obtained, the cooking temperature of the electric heating disc can be steplessly adjusted by controlling the on-off of the power supply of the electric heating disc, i.e. the cooking temperature of the electric heating disc is 350° off and 320° on, or 330° off and 280° on, or 200° off and 170° on, etc., and the continuous cooking mode in different temperature ranges is adopted, so that the cooking temperature of the electric heating disc can be purposefully controlled and adjusted according to different vessels, capacities and foods, different cooking processes and states, such as when the utensil enters the holding state, if the set holding temperature is 60°, the cooking temperature of the electric heating disc only needs to be controlled at 62° off and 58° on, and the temperature of the vessel does not need to be detected, so that the holding temperature of the vessel can be ensured to be within the set range of 60°, and the problem of burnt bottom or overflow caused by too high temperature of the electric heating disc during holding is solved.

[0034] Further, since the utensil is in abutment with the conductive layer of the electric hot plate, and the conductive layer is at the top of the electric hot plate, according to the theory of thermodynamics, the heat energy generated by the electric hot layer of the electric hot plate is mainly conducted to the upper conductive layer, and in order to improve the thermal efficiency of the appliance, reduce the downward conduction of heat to affect the performance of the device in the shell, and improve the support strength of the electric hot plate, the tray is generally made of a material with poor thermal conductivity and good mechanical strength. Such a structure causes a large temperature difference between the conductive layer and the tray, and a large temperature conduction difference between the two; therefore, the preferred solution of the technical solution is to directly abut the working end of the thermocouple temperature sensor with the conductive layer by welding, clamping, screwing, or elastic mounting, and secondly to set the working end on a transition piece, and then abut the transition piece on the conductive layer, and thirdly to abut the working end or the transition piece provided with the working end on the tray or the electric hot layer, or clamp it at the riveting position of the tray and the conductive layer.

[0035] Therefore, the technical effect of the technical solution of the cooking appliance for measuring and controlling the temperature of the electric hot plate is completely different from the method of controlling the power on-off or adjusting the power size of the electric hot plate to control the cooking state based on the cooking temperature of the utensil without knowing the temperature of the electric hot plate; therefore, the technical solution not only effectively solves the problems of traditional cooking appliances, but also expands the functions of cooking appliances and improves the performance and quality of cooking appliances.

[0036] As shown in the embodiment shown in Figure 2 , the cooking appliance for measuring and controlling the temperature of the electric hot plate comprises a body, a control panel, an electric hot plate, and a temperature sensor; the electric hot plate is a convex electric heating device in a circular, square, or oval shape; the working end of the temperature sensor is clamped and mounted on the flange outside the conductive layer, and the free end is electrically connected to the control panel through the S, R, B, N, E, T, J, and K type thermocouples.

[0037] As shown in the embodiment shown in Figure 3 , the cooking appliance for measuring and controlling the temperature of the electric hot plate comprises a body, a control panel, an electric hot plate, and a temperature sensor; the electric hot plate is a convex electric heating device in a circular, square, or oval shape; the working end of the temperature sensor is clamped and mounted on the flange outside the conductive layer, and the free end is electrically connected to the control panel through the S, R, B, N, E, T, J, and K type thermocouples.

[0038] Therefore, the technical solution of the cooking appliance for measuring and controlling the temperature of the electric hot plate is applicable to products including household or commercial electric rice cookers, electric steamers, air fryers, electric slow cookers, electric multi-purpose pots, electric pressure cookers, health pots, electric traditional Chinese medicine pots, electric stoves, etc.

Claims

1. A cooking appliance for measuring and controlling the temperature of an electric hot plate, characterized in that, Comprise: a utensil, which is a device that can be freely taken and placed on an electric heating plate to contain and heat food for cooking; an appliance, which is the main body of the cooking appliance, comprising: a shell, a power cord, a control panel, an electric heating plate, a temperature sensor, and wires for electrical connection between electrical devices; an electric heating plate, which comprises: a conductive layer in abutment with the utensil, a tray provided with a mounting bracket, and an electric heating layer provided between the conductive layer and the tray and provided with an electrical connection port; a temperature sensor, which is a thermoelectric element with a free end electrically connected to the control panel and a working end in abutment with the conductive layer of the electric heating plate, collecting temperature data of the electric heating plate by using the Seebeck effect.

2. The cooking appliance of claim 1, wherein the temperature sensor is a thermistor. The electric heating plate is a circular, square, or oval electric heating device in the form of a flat plate or a concave-convex plate.

3. The cooking appliance of claim 1, wherein the temperature sensor is a thermistor. The temperature sensor is a working end, or a working end provided on a transition piece, which is in abutment with the conductive layer of the electric heating plate directly or indirectly by welding, screws, clamping, or elastic mounting, and has one or more external protective pieces, and a free end provided with an electrical connection port and / or wires.

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