KR20130143295A

KR20130143295A - Temperature indication method for cooking ware and the device using the method thereof

Info

Publication number: KR20130143295A
Application number: KR1020120066733A
Authority: KR
Inventors: 이준배
Original assignee: 이준배
Priority date: 2012-06-21
Filing date: 2012-06-21
Publication date: 2013-12-31

Abstract

Disclosed is a continuous indication method of the temperature of a cooking ware using the relative brightness of several LEDs, and a device thereof. The continuous temperature indication method according to the present invention comprises a pre-heating indication stage indicating the start of pre-heating by operating a first LED; a cooking section indication stage in which the brightness of a second LED changes upon the temperature of the cooking ware by brightening the brightness of the second LED upon temperature rising of the cooking ware after the cooking ware has been pre-heated; an overheating alarm indication stage in which the brightness of the first LED is dramatically reduced at a specific overheating temperature and higher, and the brightness of the second LED dominates; and an overheating danger reach indication stage in which the first LED is completely turned off and only the second LED is turned on. A user is able to cook in assumption with the temperature of the cooking ware according to the relative brightness of each LED. Disclosed is a configuration of the device according to the present invention which is manufactured with minimum components. [Reference numerals] (AA) Overheating danger reach indication stage;(BB) 260°C or higher;(CC) Overheating alarm indication stage;(DD) Cooking section indication stage;(EE) Pre-heating indication stage

Description

Temperature indication method for cooking ware and the device using the method

The present invention displays the heating state of the cooking vessel or the frying pan, the user grasps the temperature state of the container, maintains the state suitable for cooking to perform the optimal cooking, as well as to prevent overheating to reduce fuel life and the life of the cooking vessel The present invention relates to a method for marking a temperature state of a cooking vessel which can be extended, and to a labeling apparatus according to the method.

Methods and apparatuses for displaying the temperature state of a cooking vessel or a frying pan to a user and various methods are known in the art, and their main purpose is to provide the user with an appropriate level of temperature so that they can cook optimally. The purpose was to prevent burn accidents from cooked containers in a heated state and to avoid energy waste and shortening of the life of containers due to overheating caused by unnecessary energy input during cooking. For this purpose, when looking at the prior art focusing on the frying pan, a color changing paint that changes color with temperature is provided with a frying pan center heating unit to display a heating state during preheating, or to display a product provided with a handle part. These products are typically based on a method that allows the user to recognize the preheating by changing the color at a temperature of about 120 to 180 degrees for the purpose of preheating display. Use a discoloration paint on the handle, such as known utility model 0345534 or 0356388. This technique can only display the initial preheating state of the cooking vessel due to the carbonization of the paint at high temperatures and the discoloration at certain temperatures, and does not help the user when cooking in the center of the container. There are disadvantages.

A device for displaying temperature using a conventional sensor and an electronic circuit is well known, and is composed of a sensor unit, a control unit, and a display unit or an alarm sound notification unit to provide information to a user. For example, registered utility model 0274258 generates an alarm sound when overheated, and 0391155, registered patents 1144855, 1147315, etc., display temperature using LEDs. However, they have complicated electronic forms that are inadequate to be applied to sensor unit, control unit, driving unit and indicator cooking vessel, and are economical and not practical for actual production, or they are simpler by removing electronic control unit like the latter patent. In addition, there is a disadvantage that the display temperature is limited to a specific temperature. They all deliver temperature indicators to the user by turning the display on and off at specific temperatures. Therefore, due to economic problems, it is usually expressed only two temperature states, preheating and overheating, and mechanically displayed at a specific temperature, ignoring that the standard of overheating is determined by the cooker's supervision according to the food condition and cooking. There are disadvantages.

As a device showing a continuous temperature change, not a non-continuous temperature indicator, is disclosed a device that displays the scale using the degree of bimetal bend according to the temperature change, such as Patent Publication 2006-0045645, the device is 300 at room temperature It is almost impossible to realize such a wide range of temperature ranges that can be realized by attaching a needle to a single bimetal and attaching it directly to a container to directly drive the bimetal due to the inability to realize bimetal displacement due to indirect heat transfer. It was. The continuous temperature display may bring useful good results in combination with the experience of a cook performing various cooking, but there is no real device that can be used. That is, providing the cooker with the optimum temperature when performing various dishes may be meaningless because it is not known which is the optimum temperature, and is often determined according to the specific cooking temperature of the dish that the cook enjoys. Accordingly, only the current state of the cooking vessel is displayed and transmitted to the user, and the user needs an apparatus for determining an optimum condition by combining the state of the cooking vessel with his cooking experience.

The present invention has been invented to overcome the above disadvantages, and provides a simple method and a device which can continuously display the temperature state of the cooking vessel to a user from preheating to overheating, instead of displaying one or two specific temperatures. Its purpose is to.

The present invention provides a method and apparatus for visually providing an indicator that allows a cook to decide on his or her own subjectivity the optimum temperature generated during various cooking by continuously expressing the temperature state of the cooking vessel. There is a purpose.

An object of the present invention is to provide an economical and durable cooking temperature continuous display device suitable for a cooking container by constructing a simplified circuit as much as possible without using a complicated control unit such as a microcomputer to continuously display the temperature change.

In order to achieve the above object, the continuous display method of temperature state according to the present invention comprises the steps of: obtaining temperature information by a sensor means from a cooking vessel; A preheat display step of informing a driving of the first LED from the temperature information that preheating of the cooking vessel is started; After the cooking vessel is preheated, the cooking section displaying step of changing the brightness of the second LED according to the temperature state of the cooking vessel by increasing the brightness of the cooking vessel; An overheating display step in which the brightness of the first LED begins to decrease rapidly above a specific overheating temperature and the brightness of the second LED becomes dominant; And an overheating danger zone display step in which the first LED is visually turned off completely and only the second LED is lit. Including, the user estimates the temperature state of the cooking vessel according to the relative brightness of each LED, characterized in that for displaying to cook. The overheat warning display step and the overheat danger section display step may simply be integrated into the overheat section. In addition, when the first LED is turned on by reducing the amount of heat source heat after overheating may further include an overheat release display step to be regarded as overheat release. Typically, the first LED uses green and the second LED uses red to facilitate emotional understanding.

The temperature state display device according to the present invention includes a sensor means for obtaining temperature information from a cooking vessel, first and second LEDs indicating a temperature state of the cooking vessel, and driving the first LED when the cooking vessel is preheated. Switching means, second LED control means for adjusting the brightness of the second LED according to the temperature state after preheating, overheat state control means for turning off the first LED in the overheat state and displaying only the second LED and a power supply for supplying power It consists of.

Each control means of the display device may be configured as a single control unit when using a microcomputer, and the sensor means may be combined with the control means to simultaneously perform two functions according to the circuit configuration according to the present invention.

By the temperature display method and apparatus according to the present invention, the user can grasp the preheating state of the cooking vessel, and the optimum cooking temperature according to various dishes by continuously determining the temperature state in the cooking section by comparing the brightness of the two LEDs. It can be used as an indicator to empirically determine the initial state of overheating and the risk of overheating due to excess heat. Therefore, it is possible to economically cook not only the optimum cooking temperature but also waste of unnecessary energy due to overheating. In addition, by displaying the state of the cooking vessel in a heated state, there is an effect of preventing an image due to contact that may be left after cooking is finished.

Figure 1 is a schematic of the temperature indicator label according to the method according to the present invention.
Figure 2 illustrates an embodiment of a temperature label display portion of the method according to the present invention.
3 is a schematic view showing the configuration of the apparatus according to the present invention.
Figure 4 is a circuit diagram showing an embodiment of the device according to the present invention.
5 is a circuit diagram showing an embodiment of the apparatus according to the present invention.

In order to achieve the above object will be described in detail with reference to the accompanying drawings.

In the continuous method of displaying the temperature state according to the present invention, at least two LEDs are used, and the temperature state of the cooking vessel is usually displayed by using green and red LEDs corresponding to sensitivity. The method according to the present invention comprises the steps of acquiring temperature information from the cooking vessel by the sensor means, a preheat display step of driving green to indicate that the preheating of the cooking vessel is started, and the cooking vessel is completely preheated. Thereafter, when the first LED is turned on, the brightness of the red LED, which is the second LED, increases according to the temperature of the cooking vessel, and the cooking interval display step of changing the brightness of the red LED according to the temperature of the cooking vessel, above a predetermined specific overheat temperature. In the step of the green LED begins to decrease sharply, the overheating display step of the brightness of the red LED is dominant, and the overheating danger zone display step of the green LED is visually turned off completely and only the red LED is lit. The overheat warning display step and the overheat danger zone display step may be simply expressed as an overheating state, but it is generally preferable to induce the user to reduce the amount of heat of the heat source by making the green extinguish a certain time. . When the green LED starts to appear due to the reduction of heat of the heat source, it is recognized as the overheat release indication step. The cooking section display step may be subdivided using other additional LEDs.

1 is a diagram illustrating an embodiment for explaining a temperature display method according to the present invention. The temperature state of the method using the relative brightness change of two LEDs is represented by giving a concentration gradient in a straight line. The two LEDs can be of any color, and according to conventional temperature sensitivity, it is preferable to use green and red. The left side of FIG. 1 shows the brightness of the red LED and the right side shows the brightness of the green LED by giving a black and white density gradient. In the black and white display, the darker the color of the LED is. In the present embodiment, a preheat display step is shown in which green starts to appear at about 110 degrees and red starts to fade at 140 degrees, and the temperature is maintained at 140 to about 190 degrees while green is turned on. A cooking section display step in which the brightness of red increases with increasing is shown. In addition, between 190 degrees and 230 degrees, the brightness of the green LED decreases rapidly and redness predominantly displays the overheating display stage. Above 230 degrees, the green color disappears completely and only the red color is displayed to indicate the overheating danger zone display stage. have. This continuous expression method conveys temperature state information in combination with the emotion and experience of the cooker in the cooking section display step in which most dishes are made, and the manufacturer divides and sets the temperature section based on the exact number as in this embodiment. However, users can use the temperature information emotionally by combining their own optimal temperature with the brightness of the LED when performing various dishes.

FIG. 2 shows a display unit according to an embodiment made in a semicircle form when the display unit 31 according to the method of the present invention is actually implemented on the handle portion 30 of the frying pan, and the red LED 2 is shown on the left side. The green LED (1) is placed on the right side to give the effect of a car speedometer. In this configuration, only the green LED 1 is turned on in the initial preheat state display step so that the entire semicircular display 31 is shown in green. After that, when the temperature rises and the red LED (2) is turned on and the cooking period is displayed, the red brightness is added or subtracted according to the cooking temperature, red color is seen from the left corner according to the temperature, and red color gradually turns to the right as the temperature rises. The visual effect is shown. When the brightness of the green LED (1) on the right is reduced and the overheating state display step in which red becomes dominant becomes over, the entire overheating danger zone display step becomes completely red. The display may be implemented in various ways depending on the form in which the display is attached to the cooking vessel.

3 is a schematic representation of each means for implementing the method according to the invention. The temperature display apparatus according to the method according to the present invention includes a sensor means 4 for obtaining temperature information from a cooking vessel, a sensor input part 5 for processing a signal of the sensor means 4, and cooking for implementing each step. LED display unit 7 for displaying the temperature state of the container, when the cooking vessel is preheated to drive the first LED and to adjust the brightness of the second LED according to the temperature state after preheating, the first LED is turned off in the overheat state And a control means 6 for displaying only the second LED, and a power supply 8 for supplying power. The sensor means 4 may be a bimetal switch or thermistor, and the preheat temperature may be used to mechanically operate the bimetal switch at a specific preheating temperature. However, in the cooking section display step, the brightness of the LED is continuously changed according to the temperature change. It is advisable to use a sensor such as thermistor because it needs to be adjusted. When the indication of the preheating temperature is implemented using bimetal, it is preferable to use the bimetal switch in combination with the power switch to supply power with the operation of the bimetal switch. The actual implementation of the control means 6 for controlling each LED can be carried out depending on the microcomputer, which is a very common case of fabrication, in which a control circuit is constructed on a conventional circuit board and woven at a predetermined temperature. By entering the program, different LEDs are driven with different brightness depending on the temperature range. Typically, the control circuit configuration using a microcomputer is obvious among those skilled in the art, and the overall configuration is the same as general electronic products, and can be applied to high-end kitchen containers, but the circuit is simple to be applied to simple and low-cost cooking containers such as a frying pan. It is not complicated. Therefore, it is not suitable as a product applied to a cooking vessel, such as a simple kitchen dish, which must perform additional functions in a harsh environment and at a minimum cost. According to an embodiment of the present invention, it is possible to configure the least minimized component and a simple circuit without using a microcomputer. Such an apparatus will be described with reference to the accompanying drawings.

4 is a circuit diagram showing the configuration of a system that omits the microcomputer and produces the same effect with a minimum number of components. The bimetal switch 20 is used to drive the first LED at the preheating temperature and the power switch function of the entire system, and the one thermistor 10 is used to control the second LED without using a control unit 6 such as a separate microcomputer. This is an example of simplified configuration using). The operation of the device by this circuit is performed as follows. First, the bimetal switch 20 used as a switching means of the system is implemented to operate at a preheating temperature, and performs the function of the sensor means 4 at this temperature to supply power at the preheating temperature. In this preheat display step, the resistance of the thermistor 10 connected in series with the red LED 2 is relatively large, so that the red LED 2 does not appear to be visually lit, and only the green LED 1 is lit. It appears to shine. The thermistor 10 uses an NTC (negative resistance temperature coefficient) type in which the resistance decreases with increasing temperature. Thereafter, as the temperature increases, the resistance of the thermistor 10 decreases, and the cooking section displaying step in which the brightness of the red LED 2 becomes brighter as the temperature rises is performed. At this time, if the gradient slope of the initial resistance value of the NTC thermistor 10 and the resistance value change in the cooking section display step is properly adjusted, the green LED 1 darkens slightly as the temperature rises but does not change rapidly. Set the resistance change so that it does not show a big difference visually. When the thermistor 10 reaches a specific overheating initial temperature and reaches a specific resistance value, the green LED 1 visually darkens rapidly and a significant portion of current flows toward the red LED 2. These phenomena are based on the unique materials of red, blue, and green LEDs, and their internal resistance and proper driving voltage are different, and when they are connected in parallel, they show unusual behavior depending on the resistance difference between the two. In general, products that are produced are connected in parallel and applied with the same voltage. In this way, the green light is drastically reduced and the red-dominated section shows the overheat warning state display step. The overheating display step is generally set at about 190 to 230 degrees since most of the cooking takes place at or below 190 degrees. It is desirable to cause the user to reduce the heat supply by making the red light appear rapidly dominant by the overheating display step. Subsequent heating causes the temperature to continue to rise so that when the resistance of the thermistor 10 reaches tens to hundreds of ohms, most of the current flows toward the red LED 2 and virtually no green light is seen. This section is an indication of the danger of overheating zone, and indicates a high temperature of more than 250 degrees that could damage the fire hazard and the cooking vessel. When the temperature of the cooking vessel decreases due to a decrease in the amount of heat supplied, the difference in brightness of each LED is expressed in the reverse order of the temperature increase from the high temperature to the low temperature. In this case, the sensor detection speed is generally lower than the temperature reduction speed of the cooking vessel itself due to the influence of the heat capacity of the sensor itself or the heat capacity of the attachment part structure, so that the temperature display section at the time of temperature reduction tends to move slightly downward. Therefore, it is desirable to minimize the sensor periphery, and the manufacturer is advised to communicate this effect to the user in advance in order to be aware of some changes in the temperature display step during temperature reduction. In order to control the power consumption and life of the system, that is, the overall brightness of the LED, a brightness control resistor 9 is provided at the front end.

The embodiment implemented in FIG. 4 is a combination of the mechanically operated bimetal switch 20 and the thermistor 10 of an electronic component. The bimetal switch is mechanically operated, and thus there is no standby power consumption. Composing the sensor unit by combining different types of sensors on the assembly board has disadvantages in that assembly problems and quality control problems may appear during mass production. FIG. 5 is a continuous state display device of the state in which the bimetal switch 20 is removed and implemented using two NTC type thermistors. The bimetal switch 20 is replaced by another switching thermistor 11 and a general switching transistor 12. At room temperature, the resistance of the switching thermistor 11 is very high, so that the base terminal of the switching transistor 12 does not apply a bias voltage enough to drive the entire system. When the temperature of the cooking vessel rises, the resistance value of the switching thermistor 11 decreases, and when the preset preheating temperature is reached, the resistance of the switching thermistor 11 simultaneously serving as the sensor means 4 is performed. The value is appropriately reduced so that the voltage capable of driving the switching transistor 12 is activated to operate the LED display unit 7 having the LEDs of two colors. The setting of the initial preheat temperature may be determined by the initial resistance value of the switching thermistor 11 and the preheat temperature control resistor 13 between the base of the switching transistor 12 and the emitter. In order to maximize the life of the battery of the power supply unit 8 and to minimize the standby power, the initial resistance of the switching thermistor 11 should be set very high, and it is desirable to consume less than 0.001 mW in the standby state. Do. Hereinafter, the cooking section display step, the overheat warning and danger display step, and the display of the overheat release according to the operation of the LED display unit 7 are implemented using the bimetal switch 20 and thermistor 10 described with reference to FIG. 4. As in one case, the relative brightness of the two LEDs according to the resistance value change of the thermistor 10 is represented by the brightness.

In general, since the change in temperature due to heating occurs more rapidly than the change in temperature due to natural cooling, each temperature state display step determined in the temperature increase section tends to move slightly downward in the low temperature step. Thus, the user may feel that the temperature step setting at the time of temperature is slightly different, but this can be taken as a natural phenomenon since the purpose of the device according to the present invention is to display the continuous temperature state combined with the emotion or experience of the cooker. .

The technical contents of the present invention have presented a method and apparatus for continuously expressing the relative brightness of two LEDs, but the range according to the present invention is three or more according to the needs of the temperature section subdivision. We can include to increase use. Such simple further modifications will be apparent to those skilled in the art and will not be described in detail.

1: Green LED 2: Red LED
4 sensor means 5 sensor input unit
6: control means 7: LED display
8: power supply unit 9: brightness control resistor
10: Thermistor 11: Switching Thermistor
12: switching transistor 13: preheating temperature control resistor
20: bimetal switch 30: handle portion
31: display unit

Claims

In the method of combined with the cooking vessel to display the temperature state of the cooking vessel to the user,
Acquiring temperature information from the cooking vessel by sensor means;
When the acquired temperature information is a preset preheating temperature section start point, the preheat display step of displaying the cooking vessel by driving the first LED to indicate that the preheating has been started, giving a gradient to the maximum brightness at the end of the preheating temperature section ;
After the cooking vessel is completely preheated, the second LED is started to be driven while the first LED is turned on, and thus the brightness of the second LED is continuously increased according to the continuous temperature increase of the cooking vessel, thereby preparing the cooking vessel at the cooking temperature. A cooking section displaying step of changing the brightness of the second LED according to the temperature state of the glass;
A superheat display step of displaying the progress of overheating by maximizing the brightness of the second LED at a preset specific overheat temperature and rapidly decreasing the brightness of the first LED; And
An overheat danger zone display step in which the first LED is visually turned off completely and only the second LED is lit;
Including, the cooking vessel temperature status display method for displaying the temperature state of the cooking vessel to the user with the relative brightness of each LED.

The method of claim 1, wherein the first LED uses a green color, and the second LED uses a red color.

The method of claim 1, wherein the cooking section display is subdivided and the third LED is turned on at a specific temperature to display more detailed temperature information to the user.

In the device coupled to the cooking vessel for displaying the temperature state of the cooking vessel to the user,
Sensor means for acquiring temperature information from the cooking vessel;
An LED display unit provided to transmit a temperature state to the user by continuously increasing or decreasing the brightness by the acquired temperature information;
Control means for driving a plurality of LEDs provided in the LED display unit and controlling brightness according to the temperature state; And
It has a power supply unit for supplying power to the whole system,
When the acquired temperature information becomes a preset preheating temperature section start point, the cooking vessel turns on and displays a first LED to indicate that preheating is started, and gives a gradient to achieve maximum brightness at the end of the preheating temperature section to display a preheating display step. ,
After the cooking vessel is completely preheated, the second LED is driven while the first LED is turned on, and thus the brightness of the second LED is continuously increased in accordance with the continuous heating up of the cooking vessel, thereby the temperature of the cooking vessel at the cooking temperature. Display the cooking period by changing the brightness of the second LED according to the state,
A temperature of the first LED is rapidly reduced and a brightness of the second LED is dominantly displayed above a predetermined specific overheat temperature to indicate an interval of overheating, and
The first LED is visually turned off completely and only the second LED is lit to indicate an overheat danger zone.
A cooking vessel temperature status display device for allowing a user to cook by estimating the temperature state of the cooking vessel according to the relative brightness of each LED.

The method of claim 4, wherein the first LED is a green series and the second LED uses a red series, and the shape of the LED display unit is provided in a semicircle shape, and each LED is provided at both sides to start preheating display. When the green light comes in from one end and is completely warmed up, the whole semicircle is shown in green, and the red light comes in from the other end in the cooking temperature section, and the area occupied by red light gradually increases as the temperature rises. Cooking vessel temperature status display device characterized in that the entire semi-circle to look red.

According to claim 4, The sensor means is provided with a bimetal switch and a negative resistance coefficient type thermistor, respectively, the second LED and thermistor connected in series and the first LED in parallel to configure an LED display unit, LED By connecting the power supply and the bimetal switch in series with the display unit, the bimetal switch performs a power switch function at the start point of preheating temperature to supply power, and the initial resistance of the thermistor is shown so that the second LED is visually turned off. The preheating display step is shown by lighting the first LED by setting it high, and the cooking section display step displaying the temperature rise of the cooking vessel by increasing the brightness of the second LED as the resistance value of the thermistor decreases as the temperature continuously increases. Brightness of the first LED decreases rapidly as the resistance of the thermistor falls below a predetermined value. To display the overheating display period so that the color of the second LED dominates, and the first LED is completely turned off visually below a specific resistance value of the thermistor so that only the second LED is lit to display the overheat state. Cooking vessel temperature status display, characterized in that.

5. The sensor of claim 4, wherein the sensor means comprises first and second negative resistance coefficient thermistors having two different initial resistance values, and is provided with a separate switching transistor to connect the first thermistor and the second LED in series. The first LED is connected in parallel with each other to form an LED display unit, and the second thermistor is connected to a base of the transistor and a power supply bias, and the LED display unit is connected to a load terminal of the transistor. The switching transistor is driven by a change in the resistance value of the thermistor so that the first LED of the LED display unit at the load end of the transistor is turned on to indicate the preheat display step, and as the temperature of the cooking vessel increases after preheating, The decrease in the resistance of the first thermistor causes the brightness of the second LED to increase, indicating the cooking zone temperature, and the second LED When the lamp is turned off, the brightness of the first LED is drastically reduced according to the change of the resistance value of the first thermistor to indicate a state of overheating, and the first LED is visually turned off completely after the specific resistance value of the first thermistor. Cooking temperature display device characterized in that to show only the LED to display the overheating state.