KR950004652B1 - Cooker - Google Patents

Abstract

a weight detector attached on the lower part of a cook container, for examining the weight of materials to cook; a temperature detector for measuring the temperature of the cook container; a heat power detector for evaluating the power consumed in heating for a time; a processor for determining the contents to cook by calculating the data detected by the weight detector, the temperature detector and the heat power detector; a controller for controlling cook processes by input of a control signal from the processor; a displayer/an alarm for informing the user on the cook processes from the processor; and a memory for memorizing data to discriminate the contents to cook and control the cook processes.

Description

Discrimination Circuit and Method of Cooking Contents of Cooker

The accompanying drawings are discrimination circuit diagrams of the amount of cooking contents of the cooker of the present invention.

* Explanation of symbols for main parts of the drawings

1: cooking vessel 2,3: cooked material

4 weight detection unit 5 temperature detection unit

6 heating power amount detection unit 7 arithmetic processing unit

8: output control unit 9: display / alarm unit

10: non-thermal memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooker using a microcomputer, and more particularly, to a circuit and method for discriminating the amount of cooking contents of a cooker, which is suitable for controlling the cooking process and generating a warning by discriminating and determining the amount of cooking contents in cooking.

In general, the existing cooker does not have a device to discriminate the exact amount of the contents of the cooking. Therefore, instead of automatically determining the amount of cooking contents (amount of rice and water), the consumer uses the special container to make the consumer inside the container. In order to be able to see the contents of the rice and water to fill the appropriate graduations engraved, the user sees this to adjust the amount of contents, in other cases, the consumer to follow the cooking method suggested in the instruction manual.

By the way, in general methods such as using a graduated container or the presentation of the usage through the user manual, there is a limit that the result of cooking is almost entirely dependent on the consumer's understanding and proper implementation method. And even if it is impossible to cook, there is a drawback that the consumer can not take appropriate protective measures such as warning and stopping cooking.

Accordingly, an object of the present invention is to detect a simple weight sensor, the temperature detection sensor of the food and the amount of heating power to solve the deficiencies according to the cooking method of the conventional cooker as described above from the non-heating data of the cooking contents inputted. The present invention provides a circuit for discriminating the amount of cooking contents of a cooker and a method for determining the exact amount of the cooked product and allowing the microcomputer to make an appropriate judgment and cooking of a cooking failure state.

The accompanying drawings are a quantity discrimination circuit diagram of the cooking contents according to the present invention. As shown therein, the weight detection unit 4 is placed on the lower portion of the cooking container 1 including cooking contents such as the cooking contents 2 and the cooking contents 3. ) And a temperature detector (5) for detecting the temperature of the cooking contents and the like, so that the outputs of the weight detector (4) and the temperature detector (5), that is, the weight and the temperature rise range, are input to the calculation processor (7). On the other hand, data from the heating power amount detecting unit 6 which detects the amount of power consumed for heating for a predetermined time is inputted to the calculation processing unit 7 and processed together, and then output control unit 8 and display / The alarm unit 9 is configured to be connected.

The operation and effects of the cooking content amount discriminating circuit of the present invention configured as described above will be described in detail as follows.

The cooking container 1 including the cooking contents 2 and 3 and the cooking contents 2 and 3 may be pure cooking contents 2, except when the weight of the cooking container 4 is constant by the weight detection unit 4. 3) Only the weight can be detected. In addition, even if the weight of the cooking vessel (2,3) is not constant, it can be used without additional calibration procedures, but if the weight of the container (1) is considerably heavy, the container (1 ) Only the weight is detected and inputted to the arithmetic processing unit 7 to calibrate.

The weight of the cooking contents 2 and 3 can be detected in the same manner as described above, and the temperature of the cooking contents 2 and 3 is detected from the temperature detecting unit 5.

In this case, the error due to the specific heat of the container 1 may be input as the calibration data by the arithmetic processing unit 7, but the general case where the specific heat is small may be ignored. Therefore, as a general case, it is assumed that the weight of the cooking vessel 1 is almost constant, and the influence of temperature due to the specific heat and weight of the vessel 1 is negligible.

Therefore, the weight of the cooking contents (2, 3) input to the arithmetic processing unit (7) and the data of the temperature detection difference (ΔT) according to the time after a certain time elapses after the start of heating and the amount of power consumed for heating for a predetermined time The detection output from the heating power amount detecting unit 6 to be detected is input to the calculation processing unit 7 to accurately determine the cooking contents through the following calculation process, and accordingly, the output adjusting unit 8 adjusts the amount of cooking heat appropriately. On the other hand, the display / warning section 9 provides appropriate information to the user.

On the other hand, the above-described cooking method for determining the contents of the cooking as follows.

The heating power W · t has the same dimension of energy as the heat quantity Q (kcal), and thus Joule and kilocalorie (kcal) have a relationship of W · T = K ₁ ΔQ = K ₁ · m · C · ΔT mutually. .

(W: watt t: sec K ₁ : Constant △ Q: Total heat gain of the heating target m: Mass of heating target C: Specific heat of heating target △ T: Temperature variation of heating target)

Here, K ₁ has a constant of 0.24 = 1 / 4.2 when the heating power is 100% purely transferred to the heated object, but may be treated as a constant that causes slight fluctuation depending on the heat transfer mechanism.

Next, assuming that the mass of the cooking contents 2 is m _a and the specific heat is C _a , the total amount of heat of heat ΔQ obtained for a certain time t seconds is expressed as follows when the temperature change range is ΔT. (Assuming temperature is uniform)

[Equation 1]

ΔQ = (m _a C _a + m _b C _b ) ΔT... … … … … … … … … … … … … … … … … … … … … (2)

Since the total weight of the cooking contents is M = m _a + m _b

[Equation 2]

ΔQ = {(M-m _b ) Ca + m _b C _b } ΔT = (MCa + m _b (C _b -Ca)) ΔT... … … (3)

If you sum it up again for m _b

[Equation 3]

m _b = (ΔQ / ΔT-MCa) / (C _b -Ca)... … … … … … … … … … … … … … … … … (4)

[Equation 4]

m _a = Mm _b . … … … … … … … … … … … … … … … … … … … … … … … … … (5)

If the cooking contents (3) is water, C _b ≒ 1

[Equation 5]

_{m 'b = (△ Q /} △ TM) / (C b -1) ... … … … … … … … … … … … … … … … … … Same as (6).

Therefore, when specific heats C _a and C _b of the cooking contents 2 and 3 are input as the dictionary information by the above formulas (4), (5) and (6), the contents of each of the cooking contents (2, 3). Accurate calculation of the mass (or volume) of is possible.

As described above, the present invention allows the optimum cooking to be performed automatically by accurately discriminating the amount of the cooked product in the cooker.

Claims (2)

A weight detection unit 4 attached to the lower portion of the cooking vessel 1 for detecting the weight of the cooked product, a temperature detection unit 5 for detecting the temperature of the cooking contents 2 and 3 and the cooking container 1, Cooking content by calculating the heating power amount detector 6 which calculates the amount of power consumed when the heating material is heated for a predetermined time, the data detected by the weight detector 4, the temperature detector 5 and the heating power detector 6 An arithmetic processing unit 7 for discriminating and determining the amount of?, An output adjusting unit 8 for inputting a control signal from the arithmetic processing unit 7 to adjust the cooking process, and the arithmetic processing unit 7 A display / alarm section 9 for alerting the user to a state, and a non-thermal memory 10 for storing data for discriminating cooking contents according to values calculated by the calculation processing section 7 and for storing data necessary for control of cooking. Characterized by consisting of Of the cooking contents quantity of cooking filter circuit. When the mass and specific heat of the two heated objects are m _a , m _b and C _a , C _{b, respectively} , the temperature rise is ΔT and the total heat input to the heated target is M, _A method for discriminating the amount of cooking contents of a cooker, characterized in that the mass of the heated object is determined as m _b = (ΔQ / ΔT-MCa) / (C _b -Ca), m _a = Mm _b .