WO2014106960A1 - Grille intelligente et procédé permettant de contrôler la température de celle-ci - Google Patents

Grille intelligente et procédé permettant de contrôler la température de celle-ci Download PDF

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Publication number
WO2014106960A1
WO2014106960A1 PCT/KR2013/000034 KR2013000034W WO2014106960A1 WO 2014106960 A1 WO2014106960 A1 WO 2014106960A1 KR 2013000034 W KR2013000034 W KR 2013000034W WO 2014106960 A1 WO2014106960 A1 WO 2014106960A1
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WIPO (PCT)
Prior art keywords
temperature
cooking
heating element
heating
meat
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PCT/KR2013/000034
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English (en)
Korean (ko)
Inventor
박대규
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주식회사 스마트로닉스
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Publication of WO2014106960A1 publication Critical patent/WO2014106960A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate

Definitions

  • the present invention relates to a smart grill using electricity as an energy source. More specifically, the present invention relates to a smart grill using a plurality of planar heating elements arranged in a matrix structure and a temperature control method thereof.
  • Fire is the oldest tool in human civilization, and was used as the only source of heat and light source until the 19th century, but has been used mainly as a heat source since the invention of electricity.
  • electricity which is a fire in a broad sense, is widely used as a heat source and a light source means.
  • Evidence is given to the number of lights and heating fixtures around us.
  • the electrical appliances have much more energy loss than the amount of energy we use effectively, and there is much room for improvement.
  • fluorescent lamps which are known to be about 5 times more energy efficient than incandescent lamps
  • only 23% of the input electrical energy is used as effective light energy, and the rest is in the form of infrared (36%) and heat (41%).
  • the heating device is inconvenient to obtain the desired temperature only after waiting a considerable time (preheating time) after the electrical energy input.
  • the present invention is one of a series of inventions invented for the purpose of using electricity as a heat source more conveniently and more efficiently.
  • the electric grill of the prior art generally has a structure having a thick plate of metal and a thermostat for controlling the temperature of the electric heater and the temperature of the electric heater at a position spaced below the plate.
  • the electric heater is not a planar heating element, but is a linear heating element arranged by bending in a zigzag form several times.
  • the plate is made of metal is because the metal has excellent thermal conductivity and heat is rapidly transferred. The reason why the plate has a considerable thickness is to spread the heat evenly so that the temperature of all regions of the plate is uniform. In addition, even if the fire plate loses a large amount of heat by cold food placed on a specific portion of the fire plate, the heat capacity of the fire plate is large so that the temperature decrease of the fire plate is not large.
  • the reason why the heat plate and the electric heater are not in close contact with each other is that the electric heater is not a two-dimensional planar heating element, but a one-dimensional linear heating element, so that the heat generated therefrom causes the entire region to be evenly heated without partial heating of the plate. To do that.
  • the electric heater is not a two-dimensional planar heating element, but a one-dimensional linear heating element, so that the heat generated therefrom causes the entire region to be evenly heated without partial heating of the plate.
  • such a structure of the plate has the following problems.
  • the temperature control is incorrect. This is because the temperature control means (thermostat) senses the temperature at a location far from the heat load (food). In most cases, it senses the temperature near the electric heater, so the temperature of the food is unknown, causing it to burn or press onto the fire plate. In some cases, the temperature of the platen is directly detected, but the temperature of a certain portion of the platen is usually detected by using a single temperature sensing means, so that different temperatures of all regions of the platen cannot be detected. For example, if there is cooked meat in the left area of the bull plate and raw meat in the right area, when the temperature of the raw meat is sensed, the cooked meat is burned.
  • the heat loss is large.
  • the prior art of heating the entire plate evenly regardless of the magnitude of the heat load mounted on the platen has a structure in which heat loss occurring in the platen area without heat load (meat) is large.
  • the electrical energy used for preheating before cooking acts as a heat loss discarded by natural cooling after use, the thicker the plate (larger heat capacity), the greater the heat loss.
  • the preheating time and heat recovery time is long. This is because even though an electric heater having a limited calorific value is used, the heat plate is large due to the thick plate.
  • the preheated plate must be preheated for a long time before cooking to reach the proper temperature for cooking. As soon as the cooking material is mounted on the plate, heat exchange occurs between the plate and the plate, the temperature of the plate decreases and the temperature of the plate increases. At this time, the fall of the platen temperature is increased as the temperature of the cooking material is lower, the heat capacity of the platen is smaller (the thinner the platen thickness), and the larger the heat capacity of the cooking material (the thicker the meat thickness).
  • the temperature of the plate increases due to a limited amount of heat supplied from a heating element (electric heater) below the plate, and the amount of heat is transferred to the cooking material and cooked while the cooking material is heated.
  • a heating element electric heater
  • the prior art that can detect the heat load is the Republic of Korea Patent 10-0743349 "heated cooker", the core of the technical idea is to provide a temperature detection tower on the outside of the cooker to detect the temperature of the heated object from the top of the heating object will be.
  • This technology essentially aims to detect the temperature of a cooking vessel mounted at a fixed position of the cooking vessel. Therefore, it is typically significantly smaller in size than the cooking vessel, and is not suitable for use in sensing the temperature of the cooking material (meat) mounted at an arbitrary position.
  • the smart grill of the present invention for solving the above-mentioned problems, a plurality of planar heating elements arranged in a matrix structure, a row drive wiring for electrically connecting one end of all the heating elements in each of the matrix rows, all in each of the matrix columns One or more insulations for protecting or insulating the heat generating layer, and a heat generating layer including a heat driving wire electrically connecting the other ends of the heating elements to each other, and a mask for insulating the wires at the intersection of the row driving wires and the heat driving wires. And a non- plate part laminated on one surface of a substrate having a plate shape, and a temperature controller for individually controlling the temperature of each of the heating elements by switching control of the current flowing through each of the heating elements.
  • the heat generating layer is further formed in the order of any one of the row drive wiring and the column drive wiring, the mask, the remaining wiring, and the planar heating element.
  • any one of the following temperature sensing means to sense the temperature of each of the heating elements.
  • the grill temperature control method of the present invention while detecting the temperature (sensing section) for sensing the temperature of the platen portion and the time for supplying power (heating section) to the platen portion alternately by a time division method, sensing in the detection section
  • the temperature of the heating element is higher than a predetermined set temperature
  • the power supply of the heating element is cut off in the heating section following the sensing section.
  • the heating element is connected to the heating element in the heating section following the sensing section.
  • the matrix rows are sequentially driven and the columns are simultaneously driven, and in the sensing section, each column is again driven within the driving time of each of the matrix rows that are sequentially driven.
  • In synchronization with the zero crossing (crossing zero) signal has a characteristic of switching.
  • the method further has a feature of allocating a time (pause section) in which no action is performed on the unlit section in synchronization with the zero crossing signal.
  • any one of the control mode of the constant power control mode for supplying a constant power to the heating element and the constant temperature control mode for varying the power supply so that the temperature of the heating element is constant In the constant power control mode, the rate of change (dT / dt) of the heating element temperature (T) is monitored, and in the constant temperature control mode, the rate of change (dP / dt) of the power (P) supplied to the heating element is monitored, When a discontinuity point occurs in the change rate curve, it is determined that the occurrence of the 'mounting meat' event, and when the discontinuity point occurs in the change rate curve when the meat is mounted, it is determined that the occurrence of the 'meat unloading' event.
  • the power (P) supplied to the heating element is reduced by a predetermined amount or more than the maximum value.
  • Condition the condition that the ratio of the power supply to the maximum value is equal to or less than a predetermined ratio, and the condition that at least one of the conditions under which the reduction rate (-dP / dt) of the power supply is smaller than a predetermined value is satisfied. It is characterized by determining the occurrence of an event.
  • a duty cycle value of a PWM waveform for switching control of the current flowing through the heating element is determined as the reference value. It has the characteristic of comparing with the value corresponding to.
  • the grill plate is logically divided to have at least one cooking zone composed of at least one heating element adjacent to each other, and each of the cooking zones may be cooked using a different recipe.
  • the platen temperature is controlled so that the data structure of the recipe includes a recognition number (ID) representing the recipe, a character string (name) representing the recipe, and the platen temperature (waiting temperature) while waiting for the plate to be cooked.
  • ID recognition number
  • name character string
  • waiting temperature the platen temperature
  • the platen temperature (heating temperature) information for keeping the cooked food in a warm state Including the platen temperature (cooking temperature) suitable for the cooking step of the cooking material, the condition for ending cooking at the cooking temperature ( One or more data combinations (cooking information) of the cooking termination condition, wherein the cooking termination condition includes a cooking time, a time reduction rate of power consumption, and a power consumption. From the reduction ratio of the small amount, and power consumption has a characteristic consisting of one or more items.
  • the temperature control method of the grill of the present invention includes the following sequential control steps, each control step of the electrostatic power control to supply a constant power to the heating element until the temperature of the heating element first reaches a predetermined set temperature; It operates in a constant temperature control mode, which operates in a mode and variably controls the power supply to maintain the temperature next time.
  • the occurrence of an event is monitored by adjusting the temperature of the heating element to a temperature higher than the ambient temperature (atmospheric temperature).
  • the 'mounting meat' event occurs to proceed to the next step, or the first step to maintain the current step; one or more, whether the occurrence of the event while adjusting the temperature of the heating element in sequence according to the cooking temperature and cooking time information If the 'meat unloading' event occurs, then proceed to the first step. If the 'cooking completion' event occurs, proceed to the next step.
  • the second step of maintaining by controlling the temperature of the heating element to a temperature suitable for eating meat (warm temperature) to detect the occurrence of the event, if the 'meat unloading' event occurs, proceed to the first step, or the current step Third step to maintain.
  • each of the plurality of planar heating elements having a temperature sensing means is independently controlled, and since the heat resistance from the heat source to the heat load is minimized, accurate temperature control is possible, so that food is not burned or pressed. It works.
  • since only a necessary amount of energy is used according to the cooking state of the food there is an effect of minimizing unnecessary heat loss.
  • the heat capacity of the heat transfer medium (unplate) is minimized, there is an effect of enabling instant preheating.
  • by providing an automated cooking process according to each cooking method there is an effect of eliminating the inconvenience of the user to manually control the temperature.
  • Figure 2 is an electrical wiring diagram of the present invention smart grill
  • FIG. 3 is an enlarged plan view of one heating element and its periphery
  • FIG. 5 is a cross-sectional view illustrating a process of manufacturing a heating layer.
  • 6 to 8 illustrate circuit diagrams of the inventive technology temperature control unit.
  • 9 to 10 are signal waveform diagrams for explaining the operation of the invention technology temperature control unit
  • 11 is a simplified state transition diagram of the invention technology temperature control unit
  • Figure 13 is a temperature curve showing the temperature change of the grill and meat of the present invention
  • 15 is a recipe data structure diagram of the inventive technique.
  • Figure 16 illustrates an electric grill projection view of the prior art
  • the fire plate is large enough to cook several pieces of meat at once.
  • raw meat, cooked meat, and cooked meat are mixed on one plate. Therefore, the temperature of the platen should be controlled in accordance with the state of cooking for each piece of meat.
  • the entire area of the grill is divided into a plurality of small cooking zones to be controlled independently to correspond to each piece of meat.
  • the shape and position of the meat pieces are not constant, there is a need for a method of making a cooking region matching the arbitrary shape and position.
  • the present invention divides the entire unbroken plate into a myriad of small regions (planar heating element size) and then controls them individually. In this way, even when a piece of meat having an arbitrary shape is mounted at an arbitrary position on the platen, a plurality of heating elements positioned below the same can supply the meat piece with heat energy optimized for the heat load (heat energy required by the meat piece). have. In addition, the unheated area where the meat pieces are not mounted stops the heat energy supply to prevent unnecessary energy loss.
  • the size of the small region is significantly smaller than the size of the meat pieces from the viewpoint of energy efficiency and precision of the temperature control, but from the viewpoint of the complexity of the control circuit, the smaller the number of the small region (planar heating element) is preferable, A compromise between them is necessary.
  • the grill of the present invention is configured to include a platen portion 10 for heating and cooking food material and a temperature control unit 20 for controlling the temperature of the platen portion.
  • the non-plate part is a structure in which a plurality of planar heating elements are arranged in a two-dimensional matrix form in close contact with a bottom surface of a plate-shaped substrate.
  • the arrangement of 12 planar heating elements 11 in three rows by four columns is shown as an example for better understanding. However, from a practical point of view, a significantly larger number of planar heating elements is required.
  • it is preferable that the platen portion and the temperature control portion can be easily separated.
  • FIG. 2 is an electrical wiring diagram for illustrating the electrical connection between a plurality of heating elements formed on the bottom surface of the substrate.
  • the most economical way to individually control multiple heating elements arranged in a two-dimensional matrix form is to allocate one electrical wiring for each matrix row and column. Therefore, as shown in Fig. 2, one end of each heating element is commonly tied to each other for driving purposes (row drive wiring 12), and the other end is tied for common driving purposes (column driving wiring 13). use.
  • the row drive wirings are wired in the horizontal direction
  • the column drive wirings are wired in the vertical direction.
  • a means (mask) to insulate between them is necessary at the point where the row drive wirings and the column drive wirings cross each other.
  • FIG. 3 is an enlarged view of one heating element and a wiring portion around the heating element.
  • 3 shows an example in which a mask 15 for insulation is provided on a column drive wiring and a row drive wiring is provided thereon.
  • the shape of the heating element pattern varies according to the sheet resistance value of the material used for the heating element. In the design, if the maximum amount of heat required for each heating element is determined to a predetermined value, the resistance value of the heating element is also determined accordingly. Therefore, even if the sheet resistance value of the heating element is changed, the shape of the heating element pattern should be changed so that the resistance value of the heating element maintains the determined value.
  • FIG. 3 shows a heating element pattern when the sheet resistance value of the heating element is large, (b) illustrates a case where the sheet resistance value is medium, and (c) shows a case where the sheet resistance value is small.
  • the non-plate part is a structure in which a plurality of film layers are laminated on a plate-shaped substrate 30.
  • the substrate uses a material such as metal, ceramic or glass.
  • the thickness of the substrate is as thin as possible, which is advantageous in terms of fast temperature sensing and fast blast heating time. This is in contrast to what was possible in the prior art with thick plates.
  • Figure 4 shows a heating element and a longitudinal cross-section around it.
  • the first insulating layer 31 is first stacked on the substrate.
  • the substrate is not a metal material, that is, an insulating material such as glass or ceramic, the insulating layer is unnecessary.
  • the heat generating layer 32 is laminated.
  • a second insulating layer 33 is laminated to achieve the purpose of protection from breakage due to external impact, prevention of deterioration of characteristics of the heat generating layer due to oxidation reaction, insulation with the outside world, and the like.
  • each layer is produced by a method of printing a pattern by a screen printing process and then sintering at high temperature.
  • LTCC low temperature co-fired ceramic
  • HTCC high temperature co-fired ceramic
  • any existing manufacturing method such as a thin film process as well as a thin film process, may be used.
  • a protective layer 34 for protecting the substrate from the scratches or foreign matters stuck in the process of cooking food may be laminated on the other surface of the substrate.
  • a representative example is the formation of a protective film by Teflon coating.
  • FIG. 5 is a cross-sectional view of the unplaten section at four center lines shown in FIG.
  • Fig. 5 (a) is a-a sectional view, (b) is b-b sectional view, (c) is c-c sectional view, and (d) is d-d sectional view.
  • thermo drive wiring 13 is at the bottommost layer
  • the thermal drive wiring is manufactured by first printing the thermal drive wiring pattern, then drying and sintering it.
  • a mask 15 for insulation is produced.
  • the row drive wiring 12 is produced.
  • planar heating element 11 is fabricated to complete the lamination of the heating layer.
  • the heating element pattern is printed to overlap with the wiring pattern as shown in (d).
  • the above-described heat generating layer is manufactured through the sequence of the heat driving wiring, the mask, the row driving wiring, and the planar heating element.
  • the planar heating element 11 is manufactured last. After fabrication of the planar heating element, each time it enters the high temperature sintering furnace once again for the sintering of the other components, the resistance value of the heating element increases rapidly, and the increase amount cannot be reasonably predicted. This is presumably because some components of the constituents of the heating element that are changed into the liquid phase in the high temperature sintering furnace are diffused into adjacent layers due to the difference in concentration. Therefore, it is preferable to produce a heating element later as possible.
  • the second insulating layer 33 to be laminated later is preferably sintered at a temperature significantly lower than the melting point of the previously stacked layers, thereby preventing the diffusion phenomenon.
  • a means for detecting the temperature of the heating element is required. The following three things can be considered in such a means.
  • the heating element is a means using a change in the internal resistance value of the heating element according to the temperature change.
  • a material whose resistivity changes with temperature changes is used as a heating element. Therefore, by measuring the internal resistance value of the heating element, it is possible to know the temperature of the heating element.
  • the material used for the heating element should have a temperature coefficient of resistance (TCR) suitable for sensing a signal, and it is preferable that the linearity of the resistance temperature coefficient is high.
  • TCR temperature coefficient of resistance
  • the resistance value changes with temperature change.
  • a temperature sensing layer insulated from the heat generating layer is further laminated on the substrate, and means for arranging the resistive temperature sensor to correspond to the position of each heat generating element.
  • the material used for the temperature sensor should have a resistance temperature coefficient suitable for detecting a signal, it is preferable that the linearity of the resistance temperature coefficient is high.
  • thermocouple voltage generated in the metal junction of different materials is provided in a layer independent of the heat generating layer corresponding to each of the heating elements, and means using a thermocouple voltage generated in the metal junction of different materials.
  • a metal junction is formed by stacking metal sheets of different materials so that portions overlap each other. This is achieved by using a thick film process of sintering at a high temperature after screen printing a paste mainly composed of metal powder, or by using a thin film process used in semiconductor manufacturing.
  • the technique of measuring temperature using thermocouple voltages generated from metal junctions of different materials is a technique for main pipe, so description thereof is omitted.
  • the temperature control unit for driving the above-described platen unit individually controls the temperature of each of the heating elements by switching control of the current flowing through each of the heating elements.
  • each column is sequentially driven again within the driving time of each matrix row that is sequentially driven.
  • the heating section, the sensing section, and each row driving time in the heating section are switched in synchronization with a zero crossing signal of an external AC power supply. This is to reduce the occurrence of EMI (Elecro-Magnetic Interference) and to reduce the switching heat loss in the switch element.
  • EMI Electro-Magnetic Interference
  • 6 to 8 are block diagrams for explaining the configuration of the temperature control unit, the configuration of which is slightly different depending on the above-described temperature sensing means.
  • 6 shows a case where the first temperature sensing means is used. Since the heating element serves as a temperature sensing sensor, the same matrix row / column driving signal line is commonly used in the sensing section and the heating section.
  • 7 shows a case where a second temperature sensing means is used.
  • the matrix thermal drive signal line uses the same signal line in common, but since the heating element and the temperature sensor are independent elements, separate matrix row drive signal lines are used in the sensing section and the heating section.
  • 8 shows a case where a third temperature sensing means is used. Since the thermocouple itself generates a voltage, it is the same as that of FIG. 6, but the constant current source CC is removed.
  • FIG. 9 to 10 are signal waveforms for explaining the operation of the temperature controller.
  • FIG. 9 illustrates a case in which heating sections T H to which half cycles of the external AC power are continuously allocated as many as the number of matrix rows are alternately allocated to sensing zones T S to which one half cycle is assigned.
  • the sensing section the temperature of all the heating elements of the unplate part is sequentially sensed, and power is simultaneously supplied to all the heating elements of the selected row of the matrix at each half cycle in the heating section. If the time period of the detection section is not sufficient to detect the temperature of the entire heating element, the length of the detection section is further extended in the half cycle unit.
  • FIG. 9 illustrates a case in which heating sections T H to which half cycles of the external AC power are continuously allocated as many as the number of matrix rows are alternately allocated to sensing zones T S to which one half cycle is assigned.
  • the temperature of all the heating elements of the unplate part is sequentially sensed, and power is simultaneously supplied to all the heating elements of the selected row of the matrix at each half cycle
  • the external AC power is rectified by the full-wave rectifier and supplied to the power of PMUX (Power Multiplexer).
  • ZCD Zero Crossing Detector
  • the pulse is transmitted to the micro-controller unit (MCU) through the INT pin.
  • the MCU allocates the sensing section T S and the heating section T H in synchronization with the pulse, and outputs the SEL signal as 1 in the sensing section and 0 in the heating section.
  • the row driver RDRV is selected from PMUX and AMUX (Analog Multiplexer) by the SEL signal.
  • the row driver has a multiplexer or selector switch structure
  • the column driver uses a plurality of switches, but one side of the switch contact is commonly connected to ground. Structure.
  • the row driver can only select any number of rows simultaneously in a matrix row
  • the column driver can select any and all columns simultaneously in a matrix column.
  • the row / column driver is implemented as an electronic switch using a power semiconductor such as SCR, TRIAC, MOSFET, IGBT.
  • the MCU When a pulse signal is first input through the INT pin, the MCU starts a sensing section in synchronization with the pulse signal. In the sensing section, AMUX is used as the row driver by outputting the SEL signal as 1.
  • the MCU outputs the row address (RAD) signal as 0 to sequentially output the column address (CAD) signal from 0 to the last value, while sequentially selecting the first row of the matrix through the RDRV, and thereby the first to last column of the matrix through the CRDV. Select sequentially up to ten columns.
  • the RAD signal is output as 1 to sequentially select from the first column to the last column with the second row selected. This iteration selects the last column of the last row. Therefore, only one heating element is selected at any time.
  • the constant current signal supplied by the constant current source CC is transmitted in the order of AMUX, heating element, heat driver, and ground.
  • the constant current source CC consists of a series circuit in which a constant current source, AMUX, heating element, and thermal driver are connected in this order. Therefore, a voltage proportional to the resistance value of the heating element is generated between the both ends of the heating element.
  • the MCU After amplifying it to Amp and converting it to a digital value by the ADC, the MCU measures the temperature of the heating element after a little calculation.
  • the MCU ignores the zero-crossing pulse signal input during the sensing section, waits for the input pulse signal after sensing the temperature of all heating elements, and ends the sensing section and starts the heating section.
  • the MCU When the heating section begins, the MCU outputs a SEL signal of zero to use PMUX as the row driver.
  • the half cycle of the external AC power supply is allocated as the driving time for each row from the first row to the last row in the matrix. Each row drive time is synchronized with the zero crossing signal of the AC power supply. If a row is selected by PMUX, V + power is applied to all heating elements connected to that row. The temperature of the heating element measured in the sensing section is compared with the set value, and the heating element is switched on by the heat driver to heat the heating element whose temperature is lower than the set value, so that current flows from the V + power supply. When the half cycle has elapsed, the selection of the row is canceled for driving the next row, and the switches of all the columns are turned OFF again.
  • FIG. 9 While the configuration of FIG. 9 measures the temperature of all the heating elements in the matrix in one sensing section and processes the power supply of all the heating elements in the subsequent heating section, the configuration of FIG. Process one row. Some time near the zero crossing of the half cycle is allocated to the sensing section of the row, and most of the remaining time is allocated to the heating section of the row. While sequentially selecting from the first column to the last column in the sensing section, the temperature of all the heating elements connected to the row is measured. In the subsequent heating section, power is simultaneously supplied to all heating elements that require heating according to the measurement result.
  • the temperature controller of the present technology controls the power supply of each heating element by PWM (Pulse Width Modulation) method.
  • PWM Pulse Width Modulation
  • the heat energy that one surface heating element can supply to the heat load in other words, the power consumed by the heating element is considered.
  • the ratio of the PWM signal that controls the power supplied to the heating elements ( duty cycle) D has a value between 0 and 1 / (M + P + Q). Therefore, the maximum value D max of the application rate D is 1 / (M + P + Q).
  • the maximum power consumed by the planar heating element is P max , the value is given by the following equation. Where V is the external power supply voltage and R is the internal resistance of the heating element.
  • FIG. 11 is a simplified state transition diagram of a grill of the present invention, and in a larger scale, the state of the present invention has three states of air (S1), cooking (S2), and thermal insulation (S3). to be.
  • S1 states of air
  • S2 cooking
  • S3 thermal insulation
  • the fire plate When power is first applied to the fire plate, the fire plate enters the standby state S1 and waits only for meat to be loaded while maintaining this state. In this state, the meat is not loaded on the plate, so unnecessary heat loss should be minimized.
  • the platen temperature at which the heat loss is zero, that is, the power supplied to the platen can be zero is room temperature, that is, the ambient temperature Ta. Since the frozen or refrigerated meat is lower than the ambient temperature, there is a temperature difference between the grill and the meat, and the present invention senses that meat is mounted by detecting a phenomenon caused by the temperature difference. However, when the meat stored at room temperature is mounted on a plate at room temperature, there is no temperature difference between the meat, the plate and the surroundings.
  • the temperature of the plate in the atmosphere should be kept slightly higher than the ambient temperature. To do this, some power must be supplied to the fire plate. This can minimize the heat loss in the atmospheric state, which is in contrast to the generation of a lot of heat loss by preheating to a high temperature in the prior art fire plate.
  • the fire plate When meat is loaded, the fire plate is switched to the cooking state S2, and is heated as soon as possible so as to have a high temperature (cooking temperature) suitable for cooking meat, and then maintains the temperature. At this time, if the user unloads the meat before cooking is completed, the state is switched to the standby state (S1), and after the cooking is completed, the state is switched to the warm state (S3). In the warm state S3, the fire plate waits only for the meat to be unloaded. In general, when the cooked food is insulated to a temperature suitable for eating, the temperature applied is known to be around 70 ° C. When the user unloads the meat for eating, the fire plate detects this and switches to the standby state (S1). Here, in order to prevent unnecessary energy loss, when a predetermined time has elapsed in the warm state S3, the process may be automatically switched back to the standby state S1 or the entire control process of the temperature controller may be terminated.
  • the platen temperature in each state shown in Fig. 11 is different from each other. If the heat source of the platen has infinite capacity, the platen temperature can be changed instantaneously. In practice, however, since the heat source has a finite capacity, there is a transient state for a considerable time when the platen temperature changes from one temperature to another.
  • FIG. 12 is a state transition diagram depicting this transition state in more detail in FIG.
  • the third letter of the state name represented by SXX in the drawings and the following description indicates the mode in which the temperature control unit drives the platen, and when the third letter is P, the constant-power control mode, T In this case, it means a constant-Temperature control mode.
  • a state in which the circle indicating the state is gray indicates that meat is mounted on the grill, and a white state indicates that the grill is empty.
  • FIG. 13 exemplifies a change in the platen (heating element) temperature according to each state of FIG. 12, and FIG. 14 shows a change in power supplied to the platen (heating element).
  • FIGS. 12 to 14 shows a change in power supplied to the platen (heating element).
  • the temperature controller drives the bulge plate in the constant power control mode.
  • the maximum power (P max ) is supplied to the platen in order to heat the platen to the atmospheric temperature (T stby ) which is slightly higher than the room temperature (T a ) as soon as possible.
  • T stby the platen state is switched to the standby state (S1T).
  • S3T the warm state
  • [S2P] the time when the temperature controller is detected, the meat with an event occurred in the time t 0, and drives the grill to the constant power control mode, power is supplied to the maximum power (P max), as shown in Fig.
  • P max the maximum power
  • the maximum power is a finite value
  • the platen temperature is further lowered until the two temperatures coincide, and the meat bottom temperature 52 is increased.
  • the temperature of the platen rises again from the moment t d when the temperature of the platen and meat becomes the same, and finally reaches the cooking temperature T cook at time t 1 .
  • the larger the maximum power value the shorter the time between t 0 and t d, and the smaller the drop of the platen temperature at t d .
  • the temperature 51 of the meat upper surface gradually rises with a considerable time delay.
  • the temperature of the middle portion of the meat is distributed in the shaded portion shown in FIG. The temperature of the middle portion of the meat is distributed closer to the bottom surface temperature 52 as it is closer to the lower surface of the meat, and closer to the top surface temperature 51 as it is closer to the meat upper surface.
  • the temperature control unit gradually decreases the platen supply power to maintain the cooking temperature by preventing further rise in temperature.
  • the reason why the power supply does not decrease sharply is that heat exchange occurs between the meat lower part and the middle meat part, and heat exchange occurs between the meat middle part and the meat upper part again, and the meat lower part constantly loses heat. Since the heat transfer speed of the meat is slow, as shown in Fig. 13, the temperature difference between the upper and lower surfaces of the meat is large at first, but as the temperature difference decreases with time, the meat is cooked. At this time, as shown in FIG. 14, the unsupply power supply 60 gradually decreases, and the decrease rate (tilt) thereof gradually decreases.
  • the temperature controller determines that the cooking completion event occurs when the reduction rate is smaller than a predetermined value.
  • a more versatile and reliable method of detecting the occurrence of the cooking completion event may include: a condition in which the supply power decreases by a predetermined amount or more from the maximum power in addition to the above condition, a condition in which the supply power reaches or below a predetermined ratio of the maximum power, Or it is determined by various combinations of any one or more of the conditions that pass a predetermined cooking time. For example, if any one of the four conditions is satisfied, it may be determined as cooking completion, and if all four conditions are satisfied, it may be determined as cooking completion.
  • the temperature controller stops the unstable power supply. Then, the grill and cooked meat is slowly cooled naturally to the temperature of the grill until the warm temperature (T warm ) suitable for eating. Here, some electrostatic force 61 may be supplied to the platen for cooling more slowly. At this time, the consumer can turn over the meat or unload the meat for eating.
  • the temperature sensor recognizes this as the occurrence of the meat unloading event and proceeds to the S1P state. However, if the meat unloading event does not occur, the temperature control unit detects that the temperature of the platen reaches the warming temperature and switches the state of the platen to the warm state.
  • the platen driving mode is the constant temperature control mode
  • the rate of change of the platen supply power slope of the supply power curve, dP / dt
  • the present technology monitors the temperature change rate (dT / dt) of each heating element in the constant power control mode, and monitors the rate of change (dP / dt) of power supplied to each heating element in the constant temperature control mode, thereby providing an empty unstable state (S1). ), If a discontinuity point occurs in the change rate curve, it is determined that the occurrence of the 'meat loading' event, and if the discontinuity point occurs in the change rate curve in the state where the meat is mounted (S2, S3), the 'meat unloading' event has occurred. To judge.
  • the present invention uses a method of monitoring the power supply or the rate of change to detect the occurrence of events such as 'cooking completion', 'meat loading', 'meat unloading' in the temperature control mode.
  • the power supply in terms of the temperature control unit is power consumption in view of the heating element, and power consumption P and its change rate dP / dt are given by the following equation.
  • the grill of the present invention uses a plurality of planar heating elements arranged in a matrix structure, and it is possible to individually control the temperature of each heating element. That is, each heating element can supply an optimized amount of heat to the heat load (meat) in contact with it.
  • the contents described so far have been limited to the case of cooking the same food ingredients in the entire area of the bulpan. This means to cook using the same recipe in all areas of the platen.
  • the grill of the present invention it is possible to logically divide the heating elements to have one or more cooking zones composed of one or more heating elements adjacent to each other, and to cook food using different recipes. For example, by dividing the entire area of the grill plate left and right, the beef sirloin can be grilled in the left cooking zone, and fried eggs or vegetable stir-fry in the right cooking zone. At this time, the left and right cooking zones should use different recipes, and should provide an appropriate user interface to the user.
  • Fig. 15 shows the data structure of the recipe of the present invention, where each data has the following meaning.
  • Recipe Name – a string representing the recipe
  • Atmospheric temperature The incubation temperature during which the cooking materials are loaded
  • Cooking end condition – Condition for ending cooking at the cooking temperature (at least one of cooking time, temporal reduction rate of power consumption, reduction amount of power consumption, and reduction ratio of power consumption)
  • the user first selects the left cooking zone, and then inputs or selects the identification number corresponding to the recipe ID.
  • the user interface then displays the recipe as "roasted beef sirloin.”
  • the left cooking zone is cooked according to a recipe corresponding to 'roasted beef sirloin'.
  • other recipes are selected through the same process for the right cooking zone.
  • the user can change data such as cooking temperature, cooking time according to the user's taste.
  • data such as cooking temperature, cooking time according to the user's taste.
  • not all existing recipe data may be included on a grill when a product is shipped, and recipes may vary depending on the age, region and race. Therefore, it is preferable that the recipe data can be changed, added, and stored by a user interface or wired / wireless communication means.
  • a user may directly input recipe data or download recipe data through a smart phone or the Internet.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

La présente invention a trait à une grille intelligente qui comprend : une pluralité de plaques de production de chaleur qui sont agencées sous la forme d'une matrice; une ligne conductrice d'attaque de rangée commune qui permet de connecter électriquement toutes les plaques de production de chaleur de chaque rangée de la matrice au niveau d'une extrémité de celle-ci; une ligne conductrice d'attaque de colonne commune qui permet de connecter électriquement toutes les plaques de production de chaleur de chaque colonne de la matrice au niveau de l'autre extrémité de celle-ci; une partie de plaque de cuisson qui est constituée d'un substrat de type plaque doté d'une couche de production de chaleur et d'au moins une couche isolante qui est destinée à protéger ou à isoler la couche de production de chaleur disposée sur un côté du substrat, la couche de production de chaleur étant pourvue d'un masque qui est agencé au niveau de chaque point d'intersection entre la ligne conductrice d'attaque de rangée commune et la ligne conductrice d'attaque de colonne commune; et une unité de régulation de température permettant d'ajuster séparément la température de chacune des plaques de production de chaleur au moyen d'une commande par commutation.
PCT/KR2013/000034 2013-01-03 2013-01-04 Grille intelligente et procédé permettant de contrôler la température de celle-ci WO2014106960A1 (fr)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI613748B (zh) * 2015-10-28 2018-02-01 瓦特洛威電子製造公司 整合式加熱器及感測器系統
WO2018029002A1 (fr) * 2016-08-08 2018-02-15 Arcelik Anonim Sirketi Cuiseur chauffant à couche mince détectant des ustensiles de cuisson avec des procédés de chauffage améliorés
WO2018028999A1 (fr) * 2016-08-08 2018-02-15 Arcelik Anonim Sirketi Réglage d'élément de chauffage de cuisinière de chauffage à pellicule mince pour le rendement de puissance
WO2018029004A1 (fr) * 2016-08-08 2018-02-15 Arcelik Anonim Sirketi Configuration d'éléments chauffants de cuiseur chauffant à couche mince
CN108121382A (zh) * 2018-02-06 2018-06-05 乐山师范学院 智能烤盘
WO2018202293A1 (fr) * 2017-05-03 2018-11-08 Arcelik Anonim Sirketi Appareil de cuisson à flexibilité et efficacité énergétique améliorées
CN112021949A (zh) * 2020-09-09 2020-12-04 上海庖钵智能科技有限公司 一种智能烹饪系统及烹饪方法
EP3749053A1 (fr) * 2019-06-05 2020-12-09 E.G.O. Elektro-Gerätebau GmbH Dispositif chauffant doté d'un élément chauffant plan, appareil de cuisson et procédé de fabrication d'un tel dispositif chauffant
CN114041694A (zh) * 2021-11-08 2022-02-15 华帝股份有限公司 一种烹饪电器的温度系统及控制方法及应用其的蒸烤箱
CN117193417A (zh) * 2023-09-22 2023-12-08 广州力加贺电子科技有限公司 一种用于烧烤炉的智能温控方法及系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019202602A1 (de) * 2019-02-26 2020-08-27 E.G.O. Elektro-Gerätebau GmbH Elektrische Heizeinrichtung für ein Kochfeld und Kochfeld
CN117858647A (zh) * 2021-06-11 2024-04-09 W.C.布拉德利公司 电气烤架控制系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100925033B1 (ko) * 2005-06-29 2009-11-04 와틀로 일렉트릭 매뉴팩츄어링 컴파니 스마트 적층형 히터면
US20100116811A1 (en) * 2008-11-11 2010-05-13 Tsann Kuen (Zhangzhou) Enterprise Co., Ltd. Grill
KR101003161B1 (ko) * 2008-05-28 2010-12-22 신범수 로스터
KR20110017705A (ko) * 2009-08-14 2011-02-22 이복덕 전기 구이장치
KR20110073407A (ko) * 2011-05-18 2011-06-29 이준배 히터일체형 복수히터 전기그릴

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953711A (en) * 1973-11-06 1976-04-27 E.G.O. Elektro-Geraete Blanc Und Fischer Cooking units

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100925033B1 (ko) * 2005-06-29 2009-11-04 와틀로 일렉트릭 매뉴팩츄어링 컴파니 스마트 적층형 히터면
KR101003161B1 (ko) * 2008-05-28 2010-12-22 신범수 로스터
US20100116811A1 (en) * 2008-11-11 2010-05-13 Tsann Kuen (Zhangzhou) Enterprise Co., Ltd. Grill
KR20110017705A (ko) * 2009-08-14 2011-02-22 이복덕 전기 구이장치
KR20110073407A (ko) * 2011-05-18 2011-06-29 이준배 히터일체형 복수히터 전기그릴

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI613748B (zh) * 2015-10-28 2018-02-01 瓦特洛威電子製造公司 整合式加熱器及感測器系統
WO2018029002A1 (fr) * 2016-08-08 2018-02-15 Arcelik Anonim Sirketi Cuiseur chauffant à couche mince détectant des ustensiles de cuisson avec des procédés de chauffage améliorés
WO2018028999A1 (fr) * 2016-08-08 2018-02-15 Arcelik Anonim Sirketi Réglage d'élément de chauffage de cuisinière de chauffage à pellicule mince pour le rendement de puissance
WO2018029004A1 (fr) * 2016-08-08 2018-02-15 Arcelik Anonim Sirketi Configuration d'éléments chauffants de cuiseur chauffant à couche mince
WO2018202293A1 (fr) * 2017-05-03 2018-11-08 Arcelik Anonim Sirketi Appareil de cuisson à flexibilité et efficacité énergétique améliorées
CN108121382A (zh) * 2018-02-06 2018-06-05 乐山师范学院 智能烤盘
EP3749053A1 (fr) * 2019-06-05 2020-12-09 E.G.O. Elektro-Gerätebau GmbH Dispositif chauffant doté d'un élément chauffant plan, appareil de cuisson et procédé de fabrication d'un tel dispositif chauffant
CN112021949A (zh) * 2020-09-09 2020-12-04 上海庖钵智能科技有限公司 一种智能烹饪系统及烹饪方法
CN112021949B (zh) * 2020-09-09 2024-05-14 上海庖钵智能科技有限公司 一种智能烹饪系统及烹饪方法
CN114041694A (zh) * 2021-11-08 2022-02-15 华帝股份有限公司 一种烹饪电器的温度系统及控制方法及应用其的蒸烤箱
CN117193417A (zh) * 2023-09-22 2023-12-08 广州力加贺电子科技有限公司 一种用于烧烤炉的智能温控方法及系统

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