KR100717466B1 - Controller for cooking utensils - Google Patents

Abstract

The present invention relates to a control device for a cooker capable of preventing a malfunction of the cooker which may occur due to the wear of a switch connected to an operation knob for adjusting the operation of the cooker.

According to another aspect of the present invention, a control device for a cooker having an operation knob includes: a voltage generator configured to output a variable level of a predetermined level to a first node according to an amount of rotation of the operation knob; and a predetermined voltage is supplied to the first node. And a voltage removing unit disposed between the input terminal of the microcomputer controlling the operation of the cooker and the first node to remove high frequency noise.

In the present invention, when the contact state is incomplete or floating state due to aging, wear, etc. of the variable resistor in contact with the switch for sensing the rotation amount of the operating knob of the cooker, by providing a voltage supply unit for supplying a predetermined voltage to the microcomputer It is possible to obtain an effect of preventing the malfunction of the device.

Cooker, Control Knob, Control, Aging, Wear, Switch

Description

Controller for cooking utensils

1 is a perspective view showing the appearance of a general electric oven range according to the prior art.

2 is an example of a control device used in a conventional cooker.

Figure 3 is an embodiment of a control device used in the cooker according to the present invention.

Figure 4 is a specific embodiment of the control device used in the cooker according to the present invention

Explanation of symbols on the main parts of the drawings

31: variable resistor 32: switch

33: Noise removing part 34: Voltage supply part

100: microcomputer 300: control device

The present invention relates to a control device for a cooker, and more particularly, to a control device for a cooker which can prevent malfunction of the cooker which may occur due to wear of a switch connected to an operation knob for adjusting the operation of the cooker.

In general, a cooker such as a microwave oven, a gas oven range, and an electric oven range is a kitchen appliance that cooks food using a microwave, electricity, or gas as a heat source.

Among them, in particular, the gas oven ranges the food by heating the food with a flame ignited in a plurality of burners using gas as a heat source, and the electric oven range heats the food with heat emitted from a plurality of burners using electricity as a heat source. I will cook. That is, the gas oven range is a cooking utensil for cooking food using conduction heat and convection heat using gas as a heat source, and the electric oven range is a cooking utensil for cooking food using radiant heat, convection heat and conduction heat as electricity. to be.

Electric oven range is heating the outside and the inside of the food to be cooked at the same time faster than the gas oven range cooking speed, thermal efficiency and safety is increasing its use is increasing trend.

Hereinafter, an electric oven range, which is one of the conventional cookers, will be described with reference to FIG. 1.

1 is a perspective view showing the appearance of a conventional electric oven range according to the prior art.

Referring to FIG. 1, the electric oven range includes a top burner unit 10 for heating and cooking food contained in a container, a control unit 20 for operating an electric oven range, and a closed space. The oven unit 30 for cooking food by tropical flow, and the drawer 40 for heating the cooked food or for simple cooking, and also for storing the cooked food, are integrally formed.

The top burner unit 10 is installed at the top of the electric oven range. The top burner unit 10 is a portion that is responsible for cooking general home cooking, radiant heat directly transmitted to the container from the plurality of burners 12 that generate heat as an applied heat source and conduction heat transferred from the container to food. As part of cooking food. The top burner unit 10 has an advantage of recognizing the cooking state at a glance.

In addition, an upper surface of the top burner unit 10 is shielded by an upper plate 14 formed of a ceramic material, and a burner 12 that radiates heat using electricity applied as a heat source under the upper plate 14 is provided. It is provided with a plurality. The rear end of the top burner 10 is formed with a control unit 20 for controlling the operation of the electric oven range.

The control unit 20 is bent upward from the rear end of the electric oven range and integrally formed, and is provided above the rear side of the top burner unit 10. Although not shown in the inside of the control unit 20 is provided with an electric device for controlling the operation of the electric oven range in response to a signal applied through the operation knob 22.

As shown, a display unit 21 for displaying the operation state and cooking time of the electric oven range is formed on the outer front of the control unit 20, the user to the left and right of the display unit 21 electric oven A plurality of operation knobs 22 are provided to protrude forward to manipulate the operation of the range.

The operation knob 22 corresponds to each quantity so as to operate the plurality of burners 12 and the oven unit 30 and the drawer unit 40 provided in the top burner unit 10, respectively. An operation knob 22 is provided.

As is well known to those skilled in the art, the control unit 20, the display unit 21, and the operation knob 22, depending on the product of the electric oven range may be formed above the rear of the top burner unit 10 as described above, Recently, it is also formed on the front of the electric oven range. However, there is no big difference in its function.

An oven unit 30 is installed below the top burner unit 10. The front of the oven unit 30 is provided with an oven door 31 to selectively shield the oven unit 30, the upper half of the oven door 31 is gripped when the user shields the oven door 31 The oven handle 32 is protruded so as to be possible.

A door outlet 34 is provided on the upper side of the oven handle 32, that is, the front upper portion of the oven door 31. The door outlet 34 is provided for cooling the oven door 31.

That is, when food is cooked in the oven unit 30, the internal temperature of the oven unit 30 rises to a high temperature. When the temperature of the oven door 31 rises to a high temperature as the temperature of the oven unit 30 rises, external cold air flows into the oven door 31 to cool the oven door 31. . The cold air cooling the oven door 31 is formed to become hot air and to be discharged to the outside through the door outlet 34.

In the substantially central portion of the oven door 31 is formed a front view window 33 is formed transparently so that the user can check the cooking state of the food cooked in the inside of the oven unit 30 from the outside.

The drawer part 40 is installed below the oven part 30. The drawer unit 40 may warm the cooked food or keep it warm, and take charge of simple cooking. The drawer part 40 is formed in the shape of a hexahedron having an upper surface opened, and the drawer handle 42 is recessed inward so that the front part is easy to grip when the user wants to use the drawer part 40. do.

Hereinafter, referring to FIG. 2, the operation of a microcomputer and a peripheral circuit, which is a part of an electric part that controls the operation of the electric oven range in response to a signal applied through the operation knob 22, will be described.

As shown in the drawing, the electronic device 100 controls the operation of the electric oven range as a whole, and a control device for transmitting a predetermined level of voltage to the microcomputer 100 in response to a signal applied through the operation knob 22. 200 is provided.

As shown, the control device 200 is composed of a voltage divider 21, a switch 22, and a noise removing unit 23.

The voltage divider 21 is composed of a variable resistor R1 connected between a power supply voltage (for example, 5V) and ground, and the switch 22 is connected to the operation knob 22 and according to the degree of rotation of the operation knob 22. The contact position with the variable resistor R1 is changed. The noise removing unit 23 is composed of a resistor R2 and a capacitor C, and removes high frequency noise included in a voltage of a predetermined level applied from the voltage divider 21 via the switch 22. Do it.

In operation, the user places a container containing food on the top plate 14 of the top burner unit 10 and then rotates the operation knob 22 clockwise (may be counterclockwise depending on the product). .

The degree of rotation of the switch 22 is determined according to the degree of rotation of the operation knob 22. As a result, a voltage within the range of 0V to 5V is output from the voltage divider 21, and the microcomputer 100 passes through the noise removing unit 23. Is sent).

The microcomputer 100 controls to transmit a predetermined electricity for heating the container containing food according to the applied voltage level to the top burner unit.

However, the conventional electric oven range has the following problems.

That is, in the conventional case, when the resistor R1 built in the voltage divider 21 is aged or worn, or the switch 22 connected to the operation knob 22 is worn, the voltage divider 21 becomes unstable. Since the level of the voltage output from the microcomputer 100 is unstable, there is a problem that abnormal electricity that is not desired by the user may be supplied to the top burner unit.

The present invention has been proposed to solve the above-mentioned problems, and an object thereof is to stabilize a control device for a cooker that generates a signal for adjusting the output of electricity and gas for cooking food using an operation knob.

To this end, it is an object of the present invention to further provide a voltage supply unit capable of always supplying a predetermined voltage to the cooker control device for default use.

An apparatus for controlling a cooker having an operating knob according to an embodiment of the present invention includes a voltage generator for outputting a variable voltage having a predetermined level to a first node according to the rotation amount of the operating knob, and supplying a predetermined voltage to the first node. The microcomputer including a voltage supply unit and controlling the operation of the cooker adjusts an output amount of a heating source used in the cooker according to the voltage level of the first node.

According to another aspect of the present invention, a control device for a cooker having an operation knob includes: a voltage generator configured to output a variable level of a predetermined level to a first node according to an amount of rotation of the operation knob; and a predetermined voltage is supplied to the first node. And a voltage removing unit disposed between the input terminal of the microcomputer controlling the operation of the cooker and the first node to remove high frequency noise.

In another embodiment of the present invention, the microcomputer for controlling the operation of the cooker is characterized in that the output amount of the heating source used in the cooker according to the voltage level output from the noise removing unit.

In embodiments of the present invention, the voltage generator is characterized by consisting of a variable resistor connected between the power supply voltage and ground.

In embodiments of the present invention, the voltage supply unit is characterized by consisting of a resistor connected between the power supply voltage and the first node.

Hereinafter, a control apparatus of a cooker, which is a preferred embodiment of the present invention, will be described in detail with reference to the accompanying drawings.

Figure 3 shows a control device of a cooker which is a preferred embodiment proposed in the present invention.

For reference, the cooker proposed in the present invention to be described below is a concept including both a microwave oven, an electric oven range, a gas oven range, and the like. More specifically, the cooker proposed in the present invention includes all types of cookers that can adjust the output of microwaves, electricity, gas, etc., which are used as a heating source by using an operation knob installed outside the cooker. . In addition, the control device proposed in the present invention means any type of device for supplying a predetermined voltage to the microcomputer that controls the operation of the cooker as a whole according to the operation of the operation knob.

Hereinafter, the configuration and operation of an embodiment of the present invention will be described with reference to FIG. 3.

As shown in FIG. 3, the control apparatus of the cooker according to the present invention has a voltage of a predetermined level in response to a signal applied through a microcomputer 100 that controls the operation of the cooker as a whole and an operation knob installed outside the cooker. The control device 300 for transmitting to the microcomputer 100 is provided.

The control device 300 includes a voltage divider 31, a switch 32, a noise removing unit 33, and a voltage supply unit 34.

The voltage divider 31 of the control device 300 is composed of a variable resistor R1 connected between a power supply voltage (for example, 5V) and ground, and the switch 32 is connected to an operation knob and is connected to an amount of rotation of the operation knob. Accordingly, the contact position with the variable resistor R1 is changed. The noise removing unit 33 is composed of a resistor R2 and a capacitor C, and functions to remove high frequency noise of the node a.

Hereinafter, an operation of the cooker control device illustrated in FIG. 3 will be described in detail.

First, the user places the container containing the food to be cooked in the cooker. Then, while holding the operation knob of the substantially circular shape provided in the outer side of a cooker, it rotates a predetermined amount normally clockwise. The rotation amount of the operation knob has the same function as input to the output amount of electricity, gas used as a heating source of the cooker. Although there may be differences in operation, this operation is the same for microwave cookers using microwaves. For example, the user should see the same concept even when using the operation knob to set the cooking time setting to, for example, 1 minute after the food is placed in the microwave.

When the manipulation knob is rotated by a user, the switch 32 connected to the manipulation knob is in contact with a specific position of the variable resistor 31 in proportion to the amount of rotation of the manipulation knob. Therefore, the node a is subjected to a voltage between 0 and 5V. For example. When the operation knob does not rotate at all, the switch 32 is in contact with the top of the variable resistor 31 so that the voltage of the node a may be 5V. When the rotation amount of the operation knob is maximum, the node a ) May be grounded, and other voltages between 0 and 5 V may be output to the node a depending on the amount of rotation of the operation knob. However, this is an example, and depending on the designer, the voltage of the node a may be grounded when the operation knob does not rotate. As can be seen above, since a predetermined voltage is supplied to the node a according to the contact state of the switch 32 and the variable resistor 31, the switch 32 and the variable resistor 31 collectively referred to the voltage generator. It could be expressed.

Next, the voltage supply unit 34 always supplies a constant voltage to the node a. Although it is considered preferable that the level of the power supply voltage used for the voltage supply section 34 be the same as the power supply voltage level used for the voltage divider 31, it may be possible to use a different voltage power supply. However, in the present invention, since the provision of a plurality of internal voltage generators can be directly connected to the increase in manufacturing cost, the same power supply voltage is used.

On the other hand, the high frequency noise of the node a is filtered by the noise removing unit 33 composed of the resistor R2 and the capacitor C. Since the high frequency noise is inevitably generated by various factors, the preferred embodiment of the present invention attempts to correct the voltage level of the node a by installing the noise removing unit 33, but according to the designer, such a noise Reject 33 may not be used. However, even if the noise canceling section 33 is not used, the technical idea of the present invention is not changed, and when the noise removing section 33 is not used, it can be regarded as another embodiment of the present invention.

The voltage of the node a is applied to the microcomputer 100 after the high frequency noise is removed from the noise removing unit 33.

The microcomputer 100 recognizes the voltage level applied through the node a to determine the opening degree of the valve for controlling the output amount (or may be referred to as discharge) of microwave, gas, electricity, etc. used as a heating source. Decide

As described in the related art, in the related art, the variable resistor 31 or the switch 32 may be worn and the rotation amount of the operation knob may not be accurately transmitted. In this case, an unexpected voltage level may occur in the microcomputer 100. It has been shown that the cooker may sometimes malfunction the heating source.

However, in the present invention, when the contact point between the switch 32 and the variable resistor 31 is uncertain or in a floating state by providing a voltage supply unit 34 supplying a constant voltage to the node a, the micom 100 ) To supply a constant voltage. As a result, the microcomputer 100 controls the operation of the cooker according to the voltage level supplied from the voltage supply unit 34. In the present invention, the connection state between the switch 32 and the variable resistor 31 becomes a floating state, so that the voltage supply unit 234 plays a main role.

This will be described with reference to FIG. 4.

4 illustrates a specific example of the embodiment of FIG. 3.

As shown, it can be seen that the voltage supply unit 34 described in FIG. 3 constitutes a resistor R3 connected between the power supply voltage of 5V and the node a, which pulls up the voltage of the node a. It can be seen that it functions.

In operation, when the contact state between the switch and the variable resistor R1 is incomplete, particularly in the floating state, a voltage of approximately 5 V applied to the node a is applied to the microcomputer 100 via the noise removing unit. When a voltage of approximately 5V is applied to the microcomputer 100, the microcomputer 100 blocks the output amount of gas, electricity, and the like to block the operation of the cooking source of the cooker in advance. Therefore, unlike the conventional case, it can be seen that a safety accident that may occur due to wear of the variable resistor R1 may be prevented in advance.

The scope of the present invention is not limited to the above-exemplified embodiments, and many modifications may be made based on the present invention to those skilled in the art within the above technical scope.

As described above, in the present invention, when the contact state is incomplete or floating due to aging, abrasion, etc. of the variable resistor in contact with the switch for detecting the amount of rotation of the operation knob of the cooker, a predetermined voltage is applied to the microcomputer. Providing the voltage supply unit to supply the effect can prevent the malfunction of the cooker in advance.

Claims (5)

In the control device of a cooker having an operation knob, A voltage generator for outputting a variable voltage having a predetermined level to the first node according to the amount of rotation of the manipulation knob; A voltage supply unit supplying a predetermined voltage to the first node, The microcomputer controlling the operation of the cooker controls the output amount of the heating source used in the cooker according to the voltage level of the first node. In the control device of a cooker having an operation knob, A voltage generator for outputting a variable voltage having a predetermined level to the first node according to the amount of rotation of the manipulation knob; A voltage supply unit supplying a predetermined voltage to the first node; A noise removing unit disposed between the input terminal of the microcomputer for controlling the operation of the cooker and the first node to remove high frequency noise; Control device for a cooker comprising a. The method of claim 2, The microcomputer controlling the operation of the cooker controls the output amount of the heating source used in the cooker according to the voltage level output from the noise removing unit. The method according to claim 1 or 2, The voltage generator is a control device of a cooker, characterized in that consisting of a variable resistor connected between the power supply voltage and ground. The method of claim 4, wherein And the voltage supply unit comprises a resistor connected between the power supply voltage and the first node.

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