KR20140123294A - Complex electric renge and power control method of the same - Google Patents

Abstract

The present invention relates to a complex electric range and a method for controlling power thereof. The complex electric range according to the present invention comprises: a highlight driving unit to drive highlights; an induction heater driving unit to drive an induction heater; an induction driving pulse generating unit to generate a first driving pulse frequency and a second driving pulse frequency lower than the first driving pulse frequency to be outputted to the induction heater driving unit; an input operating unit to input an operation for the highlights and to input a first frequency power step of operating the induction heater in the first driving pulse frequency or a second frequency power step of operating the induction heater in the second driving pulse frequency; and a control unit to control the highlight driving unit to be operated when the input operating unit inputs the operation for the highlights and to output a first frequency power control signal to the induction driving pulse generating unit when the first frequency power step is inputted or to output a second frequency power control signal to the induction driving pulse generating unit when the second frequency power step is inputted, thereby obtaining the desired heating power by increasing maximum power consumption of the induction heater while easily limiting the total power consumption of the complex electric range to the set maximum power consumption of the range.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a combined electric range and a power control method thereof,

The present invention relates to a combined electric range and a power control method thereof. More particularly, the present invention relates to a combined electric range in which the power consumption of the induction heater can be increased while easily limiting the total power consumption of the combined electric range to less than the range- To a power control method.

The spread of an electric range having a highlight as a heat source is increasing, and an electric range having a plurality of highlights is gradually becoming popular.

In the induction heating cooker, when a high frequency current flows in the induction heater, a strong magnetic field is generated in the induction heater, and the eddy current is generated in the cooking vessel in which the generated magnetic field is magnetically coupled to the induction heater. It is a cooker. Such an induction heating cooker is considered to be adopted in an electric range because there is no fear of burning.

Accordingly, there is an increasing interest in a combined electric range equipped with an induction heater of a highlight and induction heating cooker as a heat source.

However, when a large number of heat sources are provided, the total power consumption should be limited to less than the maximum power consumption value in consideration of the electric environment of the general household. In this case, if the induction heating method of the induction heating cooker is directly applied to the combined electric range, the maximum power of the induction heater is obtained at the full duty and the remaining steps are controlled at the duty ratio. In this case, in order to stably design the range-setting maximum power consumption of the combined electric range, the maximum power consumption of each heat source must be designed as small as possible. In this case, however, the desired maximum firepower is often not obtained.

SUMMARY OF THE INVENTION In order to solve the above-described problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an induction heater which can easily control the total power consumption of the combined electric range to below the range- And a power control method therefor.

In order to achieve the above object, a combined electric range according to the present invention includes at least one highlight, at least one induction heater, a highlight driving unit for driving the highlight, an induction heater driving unit for driving the induction heater, An induction drive pulse generator for generating a first drive pulse frequency and a second drive pulse frequency lower than the first drive pulse frequency and outputting the generated second drive pulse frequency to the induction heater drive unit; An input operation unit for inputting a first frequency power step for operating the induction heater at a driving pulse frequency or a second frequency power step for operating the induction heater at a second driving pulse frequency; The highlight driver And when the first frequency power step is input and the first frequency power control signal or the second frequency power step is input to the induction drive pulse generating unit, the second frequency power control signal is outputted to the induction drive pulse generating unit And provides a control unit.

Wherein the control unit decreases the power consumption of at least one of the highlight and the induction heater when the sum of the power consumptions due to the operation of the input operation unit is equal to or greater than the range set maximum power consumption, thereby reducing the sum of the power consumption of the highlight and the induction heater It is preferable to limit the range to the maximum power consumption.

The induction drive pulse generator generates a voltage higher than the first frequency power control signal when the second frequency power control signal is input, It is preferable to generate and output the 2-drive pulse frequency.

Preferably, the highlight driving unit includes a relay and a switching transistor, and the control unit controls the power consumption of the highlight by outputting a relay duty ratio control signal to the highlight driving unit.

Further comprising an induction duty ratio generation unit for operating the induction heater driving unit in accordance with the duty ratio of the induction heater, wherein when the power consumption step lower than the power consumption at the first driving pulse frequency is input from the input operation unit, It is preferable to output the induction duty ratio control signal to the duty ratio generator.

If the instantaneous power consumption of the input operation unit is greater than or equal to the maximum power consumption limit, the on duration of the relay duty ratio control signal of the highlight and the induction duty ratio control signal of the induction heater are 3 So that the sum of the power consumption of the highlight and the induction heater is limited to within the range set maximum power consumption.

The induction drive pulse generator preferably generates the first drive pulse frequency that is changed according to the level of the commercial input voltage.

A power control method for a combined electric range having at least one highlight and at least one induction heater according to the present invention is characterized in that the operation for the highlight and the operation for the first frequency power step or the second frequency power for the induction heater Comparing the total power consumption of the induction heater and the range setting maximum power consumption inputted from the input operation unit and comparing the total power consumption of the highlight and the induction heater with the range setting maximum The induction heater is driven by using the first drive pulse frequency when the first frequency power step is input and when the second frequency power step is inputted, To a frequency lower than the first drive pulse frequency Key may be achieved by providing the step of driving by the second driving pulse frequency, the above-described purpose.

According to the above-described configuration, the present invention can easily obtain a desired thermal power by increasing the maximum power consumption of the induction heater while easily restricting the total power consumption of the combined electric range to below the range set maximum power consumption.

1 is a block diagram of a combined electric range according to the present invention.
FIG. 2 is a circuit diagram showing the induction drive pulse generator and the induction duty ratio generator shown in FIG. 1 in detail.
FIGS. 3A to 3C are diagrams illustrating a first drive pulse frequency and a second drive pulse frequency output from the induction drive pulse generator shown in FIG. 2. FIG.
4 is a diagram showing control signals when the induction heater and the second highlight are driven according to the present invention.
5 is a diagram showing control signals when the induction heater, the first highlight, and the second highlight are driven according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a combined electric range and a power control method according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a combined electric range according to the present invention.

1, the induction heating cooker according to the present invention includes a first highlight 110, a first highlight driver 112, a second highlight 120, a second highlight driver 122, an induction heater 130 An induction heater driver 132, an induction drive pulse generator 134, an induction duty ratio generator 136, a resonance voltage detector 140, an induction current detector 142, an input controller 150, Unit 160 and a control unit 170. FIG.

The first highlight 110 and the second highlight 120 used as a heat source are heating elements made of electrical resistance elements. For convenience of explanation, the maximum power consumption of the first highlight 110 is set to 1.1 KW, and the maximum power consumption of the second highlight 120 is set to 2.1 KW. The second highlight 120 may include a second highlight-A 120-A and a second highlight-B 120-B, and the maximum power consumption of the second highlight-A 120- 1 KW, and the maximum power consumption of the second highlight-B 120-B may be set to 1.1 KW. The second highlight 120 may be used as a roster and the second highlight 120 may be used as a second highlight-A 120-A, And the second highlight-B 120-B may be disposed outside the second highlight-A 120-A.

The first highlight driving unit 112 is configured to supply driving power to the first highlight 110, and may include a relay (not shown) and a switching transistor (not shown).

The second highlight driving unit 122 is configured to supply driving power to the second highlight 120, and may include a relay (not shown) and a switching transistor (not shown). The second highlight driver 122 may also include a relay (not shown) and a switching transistor (not shown) when the second highlight 120 is comprised of a second highlight-A 120-A and a second highlight- (Not shown).

The first highlight driver 112 and the second highlight driver 122 are turned on and off according to a highlight control signal having a plurality of steps of the controller 170 to turn on the first highlight 110 and the second highlight 120, Can be driven to have a plurality of power consumption steps.

The induction heater 130 used as a heat source can operate by setting the power consumption of the first frequency power stage to 1.2 KW and the power consumption of the second frequency power stage to 1.8 KW.

The induction heater driving unit 132 is configured to supply driving power to the induction heater 130 and includes a power switching device (not shown) made of an IGBT and a switching driving circuit (not shown) for turning on / off the power switching device ).

The induction drive pulse generation unit 134 is a configuration for generating a drive pulse frequency supplied to the induction heater drive unit 132. [ When the first frequency power control signal is input, the induction drive pulse generating unit 134 generates a first drive pulse frequency to drive the induction heater 130 and outputs the first drive pulse frequency to the induction heater drive unit 132. When the second frequency power control signal is input, the induction drive pulse generating unit 134 generates a second drive pulse frequency lower than the first drive pulse frequency and outputs the generated second drive pulse frequency to the induction heater drive unit 132. Thereby, the induction heater 130 can obtain a higher maximum power consumption.

The induction duty ratio generator 136 generates an induction duty drive signal or an induction off drive signal to an input terminal of the induction heater driver 132 according to an induction duty ratio control signal according to a plurality of power consumption levels input by the input operation unit 150. [ .

The resonance voltage sensing unit 140 is configured to sense the resonance voltage applied to the induction heater 130. For example, when the induction heater 130 is not provided with a cooking vessel and an overvoltage is applied thereto, And outputs a driving signal.

The induction current sensing unit 142 is configured to sense a current flowing in the induction heater 130. When an overcurrent flows through the induction heater 130, the induction current sensing unit 142 outputs an induction off driving signal to the induction heater driving unit 132. [

The input operation unit 150 is for the user to operate the operation of the combined electric range and allows the user to operate the first highlight 110, the second highlight 120, and the induction heater 130 Enter the power consumption step.

The display unit 160 displays power consumption levels of the first highlight 110, the second highlight 120, and the induction heater 130 input from the input operation unit 150, Can be displayed.

The control unit 170 outputs the first highlight 110 control signal and the second highlight 120 control signal to the first input unit 150 when the operation of the first highlight 110 and the second highlight 120 is input, To the highlight driver 112 and the second highlight driver 122, respectively. When the first highlight driving unit 112 and the second highlight driving unit 122 include the relay and the switching transistor, respectively, the controller 170 controls the first highlight 110 and the second highlight 120, Duty ratio control signals, respectively.

The controller 170 outputs the first frequency power control signal or the second frequency power control signal to the induction drive pulse generator 134 when the operation of the induction heater 130 is input. The controller 170 may output a logic signal to the second frequency power control signal. The control unit 170 may output the induction duty ratio control signal to the induction duty ratio generator 136 to operate the induction heater driving unit 132 according to the duty ratio.

The control unit 170 may control the consumption of at least one of the first highlight 110, the second highlight 120, and the induction heater 130, if the sum of the consumptions according to the operation of the input operation unit 150 is equal to or greater than the range- And controls the sum of the power consumption of the first highlight 110, the second highlight 120, and the induction heater 130 to be within the range set maximum power consumption by reducing the power.

If the sum of the power consumption of the input operation unit 150 is equal to or greater than the range setting maximum power consumption, the control unit 170 controls the ON duration of the relay duty ratio control signal of the first highlight 110, The ON duration of the duty ratio control signal and the ON duration of the induction duty ratio control signal of the induction heater 130 are arranged such that three or more do not overlap at the same time so that the sum of the power consumption of the highlight and the induction heater 130 is within the range maximum power consumption Limit.

FIG. 2 is a detailed circuit diagram of the induction drive pulse generating unit and the induction duty ratio generating unit shown in FIG. 1, and FIGS. 3A to 3C are cross- And the second drive pulse frequency.

The induction drive pulse generation section 134 includes an input voltage detection part 200, an oscillation voltage generation part 230, and an induction drive pulse generation part 250.

The input voltage detecting part includes a diode D1 202 connected to a commercial power supply, a resistor R1 204, a resistor R2 206, a capacitor C1 208, a resistor R3 210, a resistor R4 212 connected to a 12V DC voltage, A resistor R5 214, an operational amplifier OP1 216, a resistor R7 218, a resistor R6 220, a resistor R8 222 and a capacitor C2 224.

The input voltage detection part 200 is distributed with the half-wave rectified commercial power through the diode D1 202 through the resistor R1 204 and the resistor R2 206 and smoothed by the capacitor C1 208. The 12V voltage is distributed by the resistor R4 212 and the resistor R5 214 and is input to the noninverting input terminal of the operational amplifier OP1 216 and the smoothed voltage of the capacitor C1 208 is supplied to the non- Inverted input terminal. As the input commercial voltage becomes lower, the output voltage of the output terminal of the operational amplifier OP1 216 rises and charges the capacitor C2 224.

The oscillation voltage generating part 230 is configured to generate an oscillation voltage for changing the oscillation frequency of the drive pulse and includes a resistor R9 230, a resistor R102 232, a resistor R11 234, a transistor Q1 238, and a transistor Q2 (240).

When the transistor Q1 238 is off and the transistor Q2 240 is on, the voltage of the capacitor C2 224 is approximately 4.7 V. When the transistor Q1 238 is on and the transistor Q2 240 is off, The voltage of C2 224 is about 5.6 V and the voltage of capacitor C2 224 is about 7.6 V when transistor Q1 238 is on and transistor Q2 240 is on.

The induction drive pulse generation part 250 changes the frequency of the induction drive pulse according to the voltage of the capacitor C2 224. The induction drive pulse generating part 250 may be constituted by a voltage controlled oscillator (VCO) circuit.

The induction duty ratio generator 136 is for operating the induction heater driver 132 according to the duty ratio. The induction duty ratio generator 136 includes a transistor Q3 260, a transistor Q4 262 connected to a 12V DC voltage, a resistor R12 264, A resistor R13 266, a capacitor C3 268, a resistor R14 270 connected to a 12V DC voltage, a resistor R15 272, a capacitor C4 274 and an operational amplifier OP2 276.

When the base signal of the transistor Q3 260 is in the high state, the transistor Q4 262 and the transistor Q3 260 are turned on and the transistor Q4 262 is in the on state. Therefore, the 12V DC voltage is applied to the resistor R12 264 and the resistor R13 266, and the voltage of the resistor R13 266 is provided to the non-inverting input terminal of the operational amplifier OP2 276. [ The 12V dc voltage is also distributed through the resistor R14 270 and the resistor R15 272 and the voltage of the resistor R15 272 is provided to the inverting input terminal of the operational amplifier OP2 276. [ Thus, if the base signal of transistor Q3 260 is high, the output of operational amplifier OP2 276 is a high signal, and if the base signal of transistor Q3 260 is low, the output of operational amplifier OP2 276 is And becomes a low signal.

Output from the induction drive pulse generating section 134 when the control section 170 outputs a high voltage to the transistor Q3 260, a low voltage to the transistor Q1 238 and a high voltage to the transistor Q2 240, The pulse frequency is shown in Figure 3A. The induction drive pulse frequency shown in FIG. 3A is referred to as a first drive pulse frequency.

Output from the induction drive pulse generating section 134 when the control section 170 outputs a high voltage to the transistor Q3 260 and a high voltage to the transistor Q1 238 and a low voltage to the transistor Q2 240, The pulse frequency is shown in Figure 3b. The induction drive pulse frequency shown in FIG. 3B is referred to as a first second drive pulse frequency.

Output from the induction drive pulse generating section 134 when the control section 170 outputs a high voltage to the transistor Q3 260, a low voltage to the transistor Q1 238 and a low voltage to the transistor Q2 240, The pulse frequency is shown in Figure 3c. The induction drive pulse frequency shown in FIG. 3C is referred to as a second second drive pulse frequency.

As can be seen in FIG. 3, the induction drive pulse frequency in the second frequency power stage is lower than the induction drive pulse frequency in the first frequency power stage. As a result, the second frequency power stage can forcibly operate the induction heater 130 at the maximum power consumption to obtain a high thermal power.

Hereinafter, a power control method for a combined electric range according to the present invention will be described.

FIG. 4 is a view showing control signals when the induction heater 130 and the second highlight 120 are driven according to the present invention, and FIG. 5 is a diagram illustrating control signals when the induction heater 130, the first highlight 110 and the second highlight 120 are driven.

First, considering the power plug used in the home, the case where the range setting maximum power consumption of the combined electric range is limited to 3KW is taken as an example. In order to explain the power control method of the combined electric range, the following power consumption steps of each heat source will be described as an example.

division Power consumption per step [%] Stage 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 HL1 [1.1 KW] 3 6 11 15 19 30 44 65 100 HL2
[2.KW] A [1KW] 3 6 11 15 19 30 50 80 100 B [1.1KW] 3 6 11 15 19 30 30 30 100 A '[alone] 9 18 25 35 42 65 80 100 100 IH [1.8KW] 20 30 40 50 60 70 100 100 100

As can be seen from Table 1, the second highlight 120 may have a mode in which only one second highlight-A 120-A operates as a single (A '). As can be seen from Table 1, the seventh power consumption of the induction heater 130 is set to 1.2 KW as the first frequency power consumption, and the eight power consumption of the induction heater 130 is 1.4 KW as the second frequency power consumption And the 9th step power consumption of the induction heater 130 is set to the third frequency power consumption and the maximum power consumption of 1.8 KW. The power consumption of the induction heater 130 in the first to sixth steps is the power consumption in which the power consumption of the seventh stage is controlled by the duty ratio.

A method of controlling the power of the induction heater 130 and the first highlight 110 and / or the second highlight 120 will be described.

First, the induction heater 130 and the first highlight 110 are supplied with power at the same time. In this case, since the sum of the maximum power consumption of the induction heater 130 and the maximum power consumption of the first highlight 110 is equal to or less than the total power consumption of the combined electric range of 3 KW, the induction heater 130 and the first highlight 110 simultaneously The maximum power consumption can be outputted.

Then, the induction heater 130 and the second highlight 120 are simultaneously powered. In this case, the sum of the maximum power consumption of the induction heater 130 and the maximum power consumption of the second highlight 120 exceeds the range setting maximum power consumption of the combined electric range of 3 KW. When the maximum power consumption of the induction heater 130 and the maximum power consumption of the second highlight 120 are set in the input operation unit 150, the controller 170 lowers the power consumption level of the induction heater 130, The power consumption level of the highlight 120 is lowered and the sum of the power consumption of the induction heater 130 and the power consumption of the second highlight 120 is controlled to be equal to or less than the total power consumption of the combined electric range of 3 KW. To this end, the present invention may have a mode in which only the second highlight-A 120-A or the second highlight-B 120-B can operate by adding the second highlight 120 alone mode. Examples of these power controls are shown in FIG.

Finally, the induction heater 130, the first highlight 110, and the second highlight 120 are simultaneously powered. In this case, the sum of the maximum power consumption of the induction heater 130, the maximum power consumption of the first highlight 110, and the maximum power consumption of the second highlight 120 exceeds the range set maximum power consumption of the combined electric range of 3 KW . When the operation of the induction heater 130, the first highlight 110 and the second highlight 120 is set in the input operation unit 150, the controller 170 lowers the power consumption level of the induction heater 130, 1 power consumption of the highlight 110 or the power consumption level of the second highlight 120 is lowered so that the power consumption of the induction heater 130, the power consumption of the second highlight 120, and the power consumption of the second highlight 120 To the total electric power consumption of the combined electric range of 3 KW or less. An example of these power control is shown in Fig.

5, when all the heat sources are operated, it is preferable that the duty ratio is controlled. Also, the ON period of the relay duty ratio control signal of the first highlight 110, the relay duty ratio control of the second highlight 120 The ON period of the signal and the ON period of the induction duty ratio control signal of the induction heater 130 are arranged so that three or more do not overlap at the same time so that the sum of the power consumption of the highlight and the induction heater 130 is limited within the range set maximum power consumption desirable.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

110: first highlight 112: first highlight driver
120: second highlight 122: second highlight driver
130: Induction heater 132: Induction heater driving part
134: Induction drive pulse generator 136: Induction duty ratio generator
140: Resonance voltage sensing unit 142: Induction current sensing unit
150: input operation unit 150: 160:
170:

Claims (10)

At least one highlight,
At least one induction heater,
A highlight driver for driving the highlight,
An induction heater driving unit for driving the induction heater,
An induction drive pulse generator for generating a first drive pulse frequency and a second drive pulse frequency lower than the first drive pulse frequency and outputting the generated second drive pulse frequency to the induction heater driver,
Inputting an operation for the highlight and inputting a first frequency power step for operating the induction heater at a first drive pulse frequency or a second frequency power step for operating the induction heater at a second drive pulse frequency An input operation unit for inputting,
Wherein when the input operation unit inputs an operation for the highlight, the highlight driving unit is controlled to operate. When the first frequency power step is input, the first frequency power control signal or the second frequency power step is input And outputting a second frequency power control signal to the induction drive pulse generating unit. The method according to claim 1,
Wherein the control unit decreases the power consumption of at least one of the highlight and the induction heater when the sum of the power consumptions due to the operation of the input operation unit is equal to or greater than the range set maximum power consumption, thereby reducing the sum of the power consumption of the highlight and the induction heater Range setting maximum power consumption. 3. The method of claim 2,
The control unit outputs a logic signal as a second frequency power control signal,
Wherein the induction drive pulse generating unit generates a voltage higher than the first frequency power control signal when the second frequency power control signal is input and generates and outputs a second drive pulse frequency from the generated high voltage, . 4. The method according to any one of claims 1 to 3,
Wherein the highlight driver includes a relay and a switching transistor,
Wherein the control unit controls the power consumption of the highlight by outputting a relay duty ratio control signal to the highlight driving unit. 5. The method of claim 4,
Further comprising an induction duty ratio generator for operating the induction heater driver according to the duty ratio,
Wherein the control unit outputs an induction duty ratio control signal to the induction duty ratio generator when a power consumption level lower than the power consumption at the first driving pulse frequency is input from the input operation unit. 6. The method of claim 5,
If the instantaneous power consumption of the input operation unit is greater than or equal to the maximum power consumption limit, the on duration of the relay duty ratio control signal of the highlight and the induction duty ratio control signal of the induction heater are 3 And the sum of the power consumption of the highlight and the induction heater is limited within the range set maximum power consumption. The method according to claim 6,
Wherein the induction drive pulse generator generates a first drive pulse frequency that is changed according to a level of a commercial input voltage. A power control method for a combined electric range having at least one highlight and at least one induction heater,
Receiving an operation for the highlight in the input operation unit and a first frequency power step or a second frequency power step for the induction heater;
Comparing the highlight input inputted from the input operation section with the total power consumption of the induction heater and a range setting maximum power consumption,
The highlight is driven if the highlight and the total power consumption of the induction heater are less than the range set maximum power consumption, and if the first frequency power step is input, the induction heater is driven using the first drive pulse frequency And driving the induction heater using a second drive pulse frequency for operating the induction heater at a frequency lower than the first drive pulse frequency when the second frequency power step is input. Way. 9. The method of claim 8,
If the total power consumption of the highlight and the induction heater is equal to or more than the range set maximum power consumption, by reducing the power consumption of at least one of the highlight and the induction heater, the sum of the power consumption of the highlight and the induction heater is set as the range- Power is limited within a predetermined range. 10. The method of claim 9,
When the instantaneous total power consumption of the highlight and the induction heater is equal to or more than the range set maximum power consumption, the ON duration of the relay duty ratio control signal of the highlight and the ON duration of the induction duty ratio control signal of the induction heater are simultaneously So that the sum of the power consumption of the highlight and the induction heater is limited to within the range set maximum power consumption.

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