KR20170130762A - Electric range of bus communication type - Google Patents

Abstract

An electric range of a bus communication system according to the present invention includes: a first working coil for induction-heating an object by input first high-frequency power; A first inverter unit for generating the first high-frequency power by an input first switching signal; A second working coil for induction-heating the object by input second high-frequency power; A second inverter unit for generating the second high-frequency power by an input second switching signal; A first signal processing unit for generating the first switching signal and the second switching signal according to a first operation control signal inputted; The first operation control signal for controlling the operation of at least one of the first and second working coils according to the input user operation and transmitting the first operation control signal to the first signal processing unit And a control microcomputer. In particular, at least the first operation control signal is transmitted in a serial communication manner.

Description

ELECTRIC RANGE OF BUS COMMUNICATION TYPE < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating type electric range using a working coil, and more particularly to an electric range using a bus type for internal communication.

Recently, induction heating type electric ranges have been widely spread and various products are being developed. In particular, an electric oven having a plurality of burners capable of heating and cooking two or more objects simultaneously is the mainstream.

In such an electric range having a plurality of culverts, inverters for applying high-frequency power are individually arranged for each culter, and each inverter is configured so that the switching operation is controlled by a separate DSP (digital signal processor).

Therefore, an electric range with three fireplaces will have three DSPs, and an electric range with four fireplaces will have four DSPs.

On the other hand, even in the case of an electric range equipped with a plurality of fire engines and a plurality of DSPs, only one control board for inputting and receiving user operations and controlling the operation of each DSP can be provided, and the integrated control microcomputer The operation of each DSP can be controlled corresponding to a user operation.

In the general electric range of this structure, the integrated control microcomputer and each DSP are directly connected. That is, the integrated control microcomputer is provided in accordance with the number of DSPs connected to a plurality of terminal sets for signaling to the DSP, and each set is connected to the corresponding signal terminal set of each DSP 1: 1. Likewise, each DSP is provided with a set of signal terminals for transmitting signals, and the integrated control microcomputer is provided with terminal sets according to the number of connected DSPs.

For example, if an integrated control microcomputer is required to transmit three signals to an arbitrary DSP, and each DSP is configured to feed one signal to the integrated control microcomputer, the integrated control microcomputer and the DSP each have four terminals, Terminals should be connected 1: 1 to each other.

Furthermore, if one integrated microcomputer is configured to control four DSPs, the integrated microcomputer will have 16 terminals and each line must be extended to each DSP to connect the terminals 1: 1.

Therefore, it is difficult to design a microcomputer because the number of terminals of the integrated control microcomputer is increased because the lines for connection between the terminals are more complicated and material costs are increased as the number of the craters is increased.

As described above, the present invention is intended to solve a problem related to a communication line caused by directly connecting an integrated control microcomputer and a plurality of DSPs.

According to an aspect of the present invention, there is provided an electric range of a bus communication system including: a first working coil for induction-heating an object by input first high frequency power; A first inverter unit for generating the first high-frequency power by an input first switching signal; A second working coil for induction-heating the object by input second high-frequency power; A second inverter unit for generating the second high-frequency power by an input second switching signal; A first signal processing unit for generating the first switching signal and the second switching signal according to a first operation control signal inputted; The first operation control signal for controlling the operation of at least one of the first and second working coils according to the input user operation and transmitting the first operation control signal to the first signal processing unit And a control microcomputer. In particular, at least the first operation control signal is transmitted in a serial communication manner.

The electric range of the present invention may further include a second signal processing unit for generating the second switching signal in accordance with the input operation signal control signal, The integrated control microcomputer generates and transmits a first operation control signal for operating the first working coil and a second operation control signal for operating the second working coil.

At this time, the serial communication method may include any one of RS 232C, RS 423, RS 422, RS 485, USB, and SATA.

When the input voltage requested by the first signal processing unit and the voltage of the first operation control signal transmitted by the integrated control microcomputer are different from each other, the voltage difference is canceled and the first operation control signal is set to the input voltage And an isolation communication unit for inputting the detection signal to the first signal processing unit.

The insulating communication unit may include an optical communication device pair that emits light corresponding to a signal to be transmitted and inversely converts the light into the signal.

Meanwhile, the first signal processing unit may include: a response indicating that the first operation control signal has been normally received; a response indicating a current switching signal output state; a state in which the operation state of the first working coil or the first inverter unit is normal And the integrated control microcomputer may control the transmission of the first operation control signal according to the responses.

According to the electric range according to the present invention, since one integrated control microcomputer and a plurality of DSPs (signal processing units) can be interconnected by a serial communication method requiring a minimum number of lines, And it is also easy to design an integrated control microcomputer.

1 is a schematic diagram illustrating an internal communication method in a general electric range.
2 is a schematic diagram illustrating an internal communication method of an electric range of a bus communication system according to an embodiment of the present invention.
3 is a schematic diagram illustrating an internal communication method of an electric range of a bus communication system according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and operation of a bus communication type electric range according to various embodiments of the present invention will be described with reference to the accompanying drawings. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments of the invention only and is not intended to be limiting.

First, it is a schematic view for explaining internal and external configurations and internal communication systems of a general electric range. The electric range includes craters (11, 12, 13, 14) for induction heating an object, inverter sections (21, 22, 23, 24) for applying high frequency electric power to induction heating the crater, (Hereinafter, referred to as signal processing units) 31, 32, 33, and 34 for generating and providing switching signals for controlling operations, an operation and display unit (not shown) for inputting user operations and displaying the operation status of the electric range 40, and an integrated control microcomputer 50 for controlling the operation of the DSP in order to control the operation of the firebox according to the user's operation. A more detailed configuration and operation of each part will be described later.

The top plate 105 of the electric range may be configured as shown in the drawing, for example. That is, display areas 111, 121, 131, and 141 for visually displaying the positions where a plurality of fireboxes are arranged may be provided. Under the respective display regions 111, 121, 131, and 141, corresponding working coils 11, 12, 13, and 14 are arranged to induction-heat an object placed in an arbitrary region of each display region.

On one side of the upper panel 105, operation means 401 for inputting a user operation by pressing or touching by the user and display means 402 for displaying information visually and audibly to the user can be formed. The user's operation on the operation means 401 can be identified by the operation and display unit 40 and transmitted to the integrated control microcomputer 50 as an operation signal. In addition, the operation and display unit 40 can display the display signal provided by the integrated control microcomputer 50 through the display unit 402 in an audiovisual manner.

The user puts an object such as a cooking container in an arbitrary display area displayed on the upper plate 105 and operates the operating means 401 to operate the firebox corresponding to the display area. As a result, the working coil of the selected crater is operated, and the operating state of the selected crater is displayed on the display means 402 in an audiovisual manner.

Each of the inverter units 21, 22, 23, and 24 applies direct current power and applies high frequency switching high frequency power to the connected working coil. The inverter units 21, 22, 23, and 24 may include, for example, a half bridge type or full bridge type switching circuit in which an upper switching element and a lower switching element are connected in series (not shown). Therefore, a switching signal for controlling the switching operation of each switching element is required. As shown in the drawing, in order to independently apply high-frequency power to the four working coils independently configured, four inverter units 21, 22, 23, and 24 corresponding to the respective working coils will be required.

The switching signals provided to the inverter units 21, 22, 23, and 24 may be generated by the signal processing units 31, 32, 33, and 34. The signal processing units 31, 32, 33, and 34 may adjust the frequency of the switching signal or the duty of the on time per cycle in accordance with the output amount control signal provided by the integrated control microcomputer 50.

The signal processing units 31, 32, 33 and 34 receive feedback on the operation states of the working coils 11, 12, 13 and 14 or the operation states of the inverter units 21, 22, 23 and 24, It is possible to determine whether it is in operation or in an error state, and may include a function of notifying the integrated control microcomputer 50 of a corresponding status signal.

Upon receiving the operation signal from the operation and display unit 40, the integrated control microcomputer 50 transmits a control signal to the signal processing unit to control the induction heating output of the requested fireplace to the requested level. Then, when the signal relating to the induction heating operation state is notified from the signal processing section, the display signal is generated so as to display the related information and transmitted to the operation and display section 40.

In this case, the communication between the integrated control microcomputer 50 and each of the signal processing units 31, 32, 33, and 34 in a general electric range is implemented by a 1: 1 communication method in which corresponding communication terminals are directly connected . Therefore, if the signal processing unit and the integrated control microcomputer 50 are connected through four signal terminals, respectively, as shown in the figure, if the four signal processing units are provided, Signal terminals, and a total of 16 communication lines will be needed.

Therefore, in the electric range according to the various embodiments of the present invention, communication between the integrated control microcomputer 50 and the signal processing unit 31, or communication from the integrated control microcomputer 50 to the inverter unit 21, By changing to the 1: N communication method, it is easy and simple to implement the communication line, and the number of communication terminals required for the integrated control microcomputer may not increase even if a crater is added.

On the other hand, the term "power" as used herein is used as a term for including both the "current" and "voltage ". For example, DC power may include DC voltage and / or DC current. In addition, high frequency power should be understood as meaning a voltage and / or a current to be switched at a high frequency.

Next, referring to FIG. 2, an internal communication method of a bus communication type electric range according to an embodiment of the present invention will be described. FIG. 2 shows a configuration in which the integrated control microcomputer controls two signal processing units at the same time. In particular, at least a part of the communication lines are connected by a serial communication method instead of a direct connection communication method.

In this specification, it is assumed that four signals are required to control one signal processing unit.

In the integrated control microcomputer 50, the respective lines are extended from the four signal terminals for the first signal processing unit 31.

On the other hand, the integrated control microcomputer 50 may be mounted on a control board (PCB) including an operating means 401 or a display means 402 arranged on one side of the electric range as shown in Fig. 1 . The first working coil 11 and the second working coil 12 and the first inverter section 21 and the second inverter section 22 and the first signal processing section 31 for driving the first and second working coils 11 and 22 And may be mounted on the inverter board 1 which is a circuit board. Similarly, the third working coil 13 and the third inverter unit 23 and the second signal processing unit 32 for driving the third working coil 13 may be mounted on the inverter board 2, which is another circuit board.

The communication connection between the control board and the inverter board 1 can be made by the communication ICs (COM1, COM2) (71, 72).

That is, when the integrated control microcomputer 50 sends signals from the four signal terminals for the first signal processing unit 31, the second communication IC 72 is connected to the first communication IC 71 ) In order to communicate in serial.

The first communication IC 71 receives the signal received through the serial communication again in the form of a signal to be inputted to each signal terminal of the first signal processing section 31 (it may be the same signal outputted from each signal terminal of the integrated control microcomputer) .

The first signal processing unit 31 may be configured to control the first inverter unit 21 and the second inverter unit 22 at the same time. It is possible to reduce the number of signal processing units required in an electric range equipped with a plurality of culverts by configuring to simultaneously control two or more inverter units within an allowable performance limit of the first signal processing unit 31. [

The second signal processing section 32 is configured to control only one inverter section 23 only.

On the other hand, in this embodiment, the communication ICs 71 and 72 may be an integrated circuit having a communication protocol conversion function including the MAX232, a UART communication supporting IC, and the like.

The serial communication method may be any one or combination of RS 232C, RS 423, RS 422, RS485, USB, and SATA communication methods.

By using the serial communication method, the communication line from the integrated control microcomputer 50 to the signal processing units 31, 32, 33, and 34 can be reduced, and the circuit design can be simplified.

On the other hand, in the figure, the control board and the inverter board 2 are configured to operate with the same voltage, and the inverter board 1 can be configured to operate with different voltages.

That is, for example, a control board on which the operation and display unit 40, the integrated control microcomputer 50, the second and fourth communication ICs 72 and 74 are mounted, The inverter board 2 on which the three inverter unit 23, the second signal processing unit 32, and the third communication IC 73 are mounted can be configured to operate by a 5 V DC voltage. The first inverter section 21, the second inverter section 22, and the first signal processing section 31 may be configured to operate by a DC voltage of 3.3V.

Thus, if the components of each circuit board are configured to operate with different voltages, isolation means is required to transmit signals across the voltage region. The communication isolation unit (ISO1) 61 functions to connect communication between different voltage regions.

The communication isolator 61 may be an optical communication element pair including, for example, a light emitting element that emits light corresponding to a signal to be transmitted and a light receiving element that inverts the light emitted from the light emitting element back to a signal to be transmitted again. Of course, other insulated parts may be used.

3 is a schematic diagram illustrating an internal communication method of an electric range of a bus communication system according to another embodiment of the present invention. In this embodiment, a communication bus 80 is provided between the control board and the inverter boards 1 and 2, and a control signal is transmitted and received using the bus.

The integrated control microcomputer 50 may include a set of signal terminals for controlling one signal processing unit. In the present embodiment, four signal terminals are shown as being necessary. The second communication IC 72 converts each signal from the four signal terminals into a serial signal, and loads the converted serial signal on the bus 80. [ The first communication IC 71 to the inverter board 1 and the third communication IC 73 of the inverter board 2 may be connected to the bus 80. [ In addition, the third signal processing unit 33 of the inverter board 2 can be directly coupled to the bus 80 without passing through a separate communication IC.

On the other hand, the first communication IC 71 receives the serial signal when the serial signal mounted on the bus is the destination thereof or the first signal processor 31, and outputs the serial signal to the first signal processor 31 As shown in FIG.

Here, the influence due to the difference in voltage region between the first communication IC 71 and the first signal processing unit 31 or between the second communication IC 72 and the first communication IC 71 (not shown) And a communication insulating portion 61 for attenuating it may be disposed.

In FIG. 3, the first signal processing unit 31 may be configured to control the first inverter unit 21 and the second inverter unit 22 simultaneously or alternately.

On the other hand, the third communication IC 73 receives the serial signal when the serial signal mounted on the bus 80 is the destination thereof or the second signal processing unit 32 is the destination. The third communication IC 73 inversely converts the received serial signal into a signal form required by the second signal processing unit 32. [

The second signal processing unit 32 controls the operation of the third inverter unit 23 according to the inverse-transformed signal.

The third signal processing unit 33 may include a serial communication processing function that can receive and process the serial signal generated by the second communication IC 72 by itself. Thus, the third signal processing section 33 can be directly coupled to the bus 80 without analyzing a separate communication IC to analyze and receive the serial signal.

The second signal processing unit 32 and the third signal processing unit 33 may also control two or more inverter units simultaneously or alternately.

In the present embodiment, the communication ICs 71 and 72 may be an integrated circuit having a communication protocol conversion function including the MAX232, a UART communication supporting IC, and the like.

The serial communication method may be any one or combination of RS 232C, RS 423, RS 422, RS485, USB, and SATA communication methods.

In the accompanying drawings and the above description, the number of the communication lines and the connection method are provided by way of example only and can be configured with more or fewer number of lines. Accordingly, the present invention aims at reducing the number of communication lines required by the communication system from the integrated control microcomputer to the signal processing unit or the communication system from the signal processing unit to the inverter unit through the bus, thereby reducing the number of communication lines required for the communication system. .

In the above description, the communication between the integrated control microcomputer and each signal processing unit is changed to the serial communication system. However, a method of reducing the line for signal transmission by multiplexing each signal in time or frequency multiplexing and parallel transmission is also considered .

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the essential characteristics thereof, It is to be understood that the invention is not limited thereto.

Claims (6)

A first working coil for induction heating an object by input first high frequency power;
A first inverter unit for generating the first high-frequency power by an input first switching signal;
A second working coil for induction-heating the object by input second high-frequency power;
A second inverter unit for generating the second high-frequency power by an input second switching signal;
A first signal processing unit for generating the first switching signal and the second switching signal according to a first operation control signal inputted;
The first operation control signal for controlling the operation of at least one of the first and second working coils according to the input user operation and transmitting the first operation control signal to the first signal processing unit A control microcomputer,
Wherein at least the first operation control signal is transmitted in a serial communication manner. The method according to claim 1,
And a second signal processing unit for generating the second switching signal in accordance with an input operation signal control signal,
The first signal processing section generates only the first switching signal in accordance with the first operation control signal,
Wherein the integrated control microcomputer generates and transmits a first operation control signal for operating the first working coil and a second operation control signal for operating the second working coil, range. 3. The method according to claim 1 or 2,
Wherein the serial communication method comprises any one of RS 232C, RS 423, RS 422, RS 485, USB, and SATA. The method according to claim 1,
Wherein when the input voltage required by the first signal processing unit and the voltage of the first operation control signal transmitted by the integrated control microcomputer are different from each other, the first operation control signal is canceled by the first operation control signal, 1 < / RTI > signal processing unit of the bus communication system. 5. The method of claim 4,
Wherein the insulating communication unit includes an optical communication device pair that emits light in accordance with a signal to be transmitted and inversely converts the light into the signal. The method according to claim 1,
Wherein the first signal processing unit is configured to determine whether a response indicating that the first operation control signal has been normally received, a response indicating a current switching signal output state, an operation state of the first working coil or the first inverter unit is normal And transmits at least one of the responses to be displayed to the integrated control microcomputer,
And the integrated control microcomputer controls transmission of the first operation control signal according to the responses.

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