KR0176930B1 - Fryer - Google Patents

Abstract

Electric frying machine of the present invention, in the electric frying machine to perform the frying by moving the frying container up and down according to the frying state by the lifter drive unit and the lifter, it is possible to attach and detach from the bottom surface of the fryer main body, Induction heating cooker for heating the frying vessel at the time of attachment, a contact portion for driving power is applied to the lifter drive unit and the lifter or cut off, and the drive by determining the position and normal operation of the lifter in accordance with the drive voltage of the lifter It is configured to include a microcomputer for controlling the application of the power, it is possible to perform the operation of supplying power to the lifter and the position of the lifter to the microcomputer with two lines, and also detects the position signal of the lifter Proper control is possible, and for safety, the drive current can be By the relay off an effect that can be a safety barrier.

Description

Electric fryer and its control method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fryer, and more particularly, to an electric fryer and a method of controlling the same, which can be attached and detached using an induction heater as a heating source.

FIG. 1 shows an electric fryer according to the related art, and includes a frying container that puts the actual cooking oil 4 and frys it, and moves up and down by a lifter 6 to move the food 3 into cooking oil. The current supplied to the heater through a frying net (2) for picking up or fry the food, or a heater (5) for heating the cooking oil, and a bimetal (8) connected to the heater (5). It is composed of a temperature control unit 7 for adjusting the temperature of the fry so as to be a proper temperature, a timer 9 for setting a cooking time, and a lid 10.

In addition, as shown in FIG. 2, the lifter 6 includes a rise switch 12 and a down switch 13 connected in series between a power source AC 11 and a motor 15, and For the two switches connected in series, the manual switch 14 is raised or lowered by controlling the on and off of each of the switches through a parallel connected drive unit.

In addition, the lifter 6 and the motor 15 are engaged with the torque / speed adjusting gear 25 and the motor-side gear 21 as shown in FIG. 3, and the motor-side gear is centered on the shaft 22. Rotates the engaged torque / speed adjusting gear 25 as a synchronous motor turning only in one direction, and moves the heater up and down about the support point 24 at the end of the torque / speed adjusting gear 25. To switch.

At this time, grooves (ⓐ, ⓑ) for operating the micro switch are provided on the bottom of the torque / speed adjusting gear so that the lifter and the lowerer switch are turned off when the lifter reaches the upper limit and the lower limit, respectively. .

However, such a conventional electric fryer has a problem in that it is not possible to check and control the normal operation by simultaneously performing the motor power supply and the position signal detection of the lifter.

Accordingly, an object of the present invention is to provide an electric fryer for solving the above problems and supplying power to the motor with two lines of the power contact portion for driving the motor gutter and detecting the position signal of the lifter.

Another object of the present invention is to provide a control method for controlling the electric fryer.

Electric frying machine of the present invention for achieving the above object, in the electric frying machine to perform the frying dishes by moving the frying container up and down according to the frying state by the lifter drive unit and the lifter, attached to the bottom surface of the frying machine main body And an induction heating cooker capable of being detached and heating the frying vessel when attached, a contact portion for driving power to the lifter driver and the lifter, or a cutoff, and the position and position of the lifter according to the drive voltage of the lifter. It is characterized in that it comprises a microcomputer for determining the operation whether or not to control the application of the drive power.

The control method of the electric frying machine of the present invention for achieving the above another object, in the control method of the electric frying machine to perform the frying by moving up and down according to the frying state by the lifter drive unit and the lifter, the user switches the power switch Turning on and setting the cooking temperature, heating the cooking oil until the set cooking temperature is reached, stopping the heating when the set cooking temperature is reached, and supplying driving power to the lifter driver and the lifter, and the cooking time is completed. The driving voltage of the lifter driving unit and the lifter is detected until the driving state is determined and displayed according to the driving voltage range. If the driving voltage is not within the predetermined range, the driving power is cut off.

1 is a device diagram of an electric fryer according to the prior art.

FIG. 2 is a detailed circuit diagram of the lifter driver for driving the lifter of FIG.

3 is a device connection and driving principle of the lifter drive of FIG.

4 is an apparatus diagram of an electric fryer according to the present invention.

5 is a detailed circuit diagram of the lifter driver and the lifter of FIG.

6 is a device connection and driving principle of the lifter drive of FIG.

7 is an operation timing diagram of the lifter driver of FIG.

8 is a flowchart illustrating a control method of the electric fryer according to the present invention.

* Explanation of symbols for main parts of the drawings

40: contact portion 50: electric fryer

60: induction heater 70: microcomputer

80: operation switch

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Electric frying machine of the present invention, as shown in Figure 4, the induction heating cooker 60 for supplying a large heat source, and the actual food 53, that is, to store the frying, and soaking the food in edible oil 54 When the temperature of the cooking oil reaches the appropriate temperature, the frying net 52 for cooking and the cooking oil are driven to the motor 59 to automatically immerse the frying net in cooking oil. An electric fryer 50 consisting of a lifter driving part for removing oil and preventing frying from being excessively fried, a temperature sensor 58 for detecting the temperature of cooking oil attached to the main body 51, and the electric fryer 50. It is configured to include a contact portion 40 for attaching and detaching the induction heating cooker 60 to the body of the.

As shown in FIG. 5, the lifter drive unit, the lifter 56, and the contact unit 40 are relays including the switches Rs1 and Rs2 connected to both sides of the AC power source AC as shown in FIG. The switch SW1 and SW2 are connected in parallel between the motor 59 and the motor 59, and the relay switch Re2 has a diode D1 and a discharge resistor R4 between the diode D1 and the ground to rectify the driving power. The smoothing capacitors C1 are connected in parallel to each other so that the rectified driving voltage Vs is applied to the microcomputer 70.

In the microcomputer 70, the driving of the relay is controlled according to the driving voltage Vs to supply or cut off the driving power, display the state of the lifter, and turn off the operation switch 80 when the frying is completed. Let's do it.

In addition, the motor side gear 111 in the lifter drive unit and the lifter, the lifter gear 113 engaged with the motor side gear 111, and the motor side gear and the lifter gear are referred to the actual frying net hook groove 114. The mechanically connected state of the lifter 112 and the switches SW1 and SW2 moving up and down is as shown in FIG.

The operation and control method of the electric fryer of the present invention configured as described above with reference to FIGS. 7 and 8 are as follows.

When the power is turned on and cooking is started, the induction heating cooker is driven and heated, sensing the temperature of the cooking oil through the temperature sensor to reach an appropriate temperature, and after the induction heating cooker is turned off, the frying net is heated. Drive the lifter to immerse in the

In order to drive the lifter, the relay is rotated by turning on the relay of the contact unit so that AC power is supplied to the motor. When the lower limit point is set, the switches SW1 and SW2 are turned off so that a current for motor driving only flows. Then, the rectified voltage is input to the microcomputer, that is, the driving voltage Vs for driving the lifter.

Then, in the microcomputer, it is divided into four stages according to the reference voltage check1 (= ①) check2 (= ②) check3 (= ③), and if the driving voltage is less than the minimum reference value as one stage (Vscheck1), it is disconnected. Since the motor does not operate, the drive power is turned off after displaying an error.In the second step, if the drive voltage is greater than the minimum reference value and less than the intermediate reference value (check1Vscheck2), the lower limit is reached. In this case, the relay is in the on state, and the switches SW1 and SW2 are both in the off state, and in three stages, if the value is larger than the intermediate reference value and less than the maximum reference value (check2Vscheck3), the lifter is in the moving state, and the relay is in the on state. The switch turns on only SW1. If the switch is larger than the maximum reference value (Vscheck3), the switch immediately shuts off the driving power.

After a certain period of time, when the frying time is completed, turn off various loads, terminate frying, and when there is no frying container, it detects this as a driving current and turns off the power supply for safety.

As described above, according to the present invention, power is supplied to the motor for moving the lifter up and down by two wires, the position signal of the lifter can be sensed, and appropriate control is possible. By turning off the relay through the effect that can be a safety block.

Claims (5)

In the electric frying machine which performs the frying cooking by moving the frying container up and down according to the frying state by the lifter driving part and the lifter, it is possible to attach and detach the bottom surface of the frying body and to heat the frying container when attached. Microcomputer for controlling the application of the driving power by determining the position of the lifter and the normal operation according to the driving voltage of the lifter and the contact portion for driving power is applied to the lifter driver and the lifter or the lifter Electric fryer characterized in that it comprises a. The electric flipper according to claim 1, wherein the lifter driver and the lifter comprise a motor for actually moving the lifter up and down, and switches SW1 and SW2 connected in parallel between the motor and the contact part. . According to claim 1, Diode (D1) for rectifying the driving power input to the lifter driver and the lifter and the microcomputer between the contact portion and the microcomputer, and the smoothing capacitor (C1) connected between the diode and ground ) And an electric frying machine, which is configured by further connecting a discharge resistor (R4). In the method of controlling an electric fryer in which cooking oil is heated by an induction heating cooker and a frying dish is moved up and down according to the frying state by the lifter driving unit and the lifter, the user turns on the power switch and sets the cooking temperature. If set, the process of heating the cooking oil until the set cooking temperature, the process of stopping the heating and supplying the driving power to the lifter driving unit and the lifter when the set cooking temperature is reached, and the lifter driving unit until the cooking time is completed And detecting the driving voltage of the lifter to determine and display the driving state according to the driving voltage (Vs) range, and if the driving voltage is not within a predetermined range, cutting off the driving power. 5. The driving voltage range is divided into four steps, and when the driving voltage range is smaller than the minimum reference value as one step (Vs check1), an error is displayed and the driving power is cut off. If it is smaller (check1Vscheck2), it displays the lower limit and if it is larger than the middle reference value as the 3rd step (check2Vscheck3), it indicates moving and if it is larger than the maximum reference value (Vscheck3) as 4 step, it cuts off the driving power immediately. Control method of electric fryer.