# US 8,543,250 B2 · Electric appliance and a control method thereof

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- Number: US 8,543,250 B2
- Document ID: US8543250B2
- Status: Granted
- Kind: B2
- Application number: 12/909,451
- Filed: 2010-10-21
- Published: 2011-04-28
- Granted: 2013-09-24
- Earliest claimed: 2009-10-26
- Assignees: LG Electronics Inc.
- Applicants: Mun Seok Seo; Jin Seong Hwang; Dae Geun Seo
- Inventors: Mun Seok Seo; Jin Seong Hwang; Dae Geun Seo
- Web page: https://patentgrep.com/patent/US8543250B2

## CPC

- G01D 4/004: {Remote reading of utility meters to a fixed location}
- H04L 12/12: Arrangements for remote connection or disconnection of substations or of equipment thereof
- H04L 12/2803: {Home automation networks}
- H04L 41/0833: for reduction of network energy consumption
- G01D 2204/12: Determination or prediction of behaviour, e.g. likely power consumption or unusual usage patterns
- Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B 90/20: Smart grids as enabling technology in buildings sector (smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00)
- Y02D 30/50: in wire-line communication networks, e.g. low power modes or reduced link rate
- Y04S 20/20: End-user application control systems
- Y04S 20/242: Home appliances
- Y04S 20/30: Smart metering, e.g. specially adapted for remote reading
- Y04S 40/00: Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

An electric appliance and a control method thereof are disclosed. The electric appliance includes a communication device connected with a smart grid net to recognize electric power information including power-rate information for each time period, a sensing device configured to sense a predetermined operation mode and an operation state according to the operation mode, and a control device configured to implement power-saving operation based on the received electric power information and the state information sensed by the sensing device.

## Claims

### Claim 1

An electric appliance comprising:
a communication device connected with a smart grid net and configured to receive electric power information including a billed power-rate for each time period and a highly billed power rate time period in which the billed power-rate is a predetermined reference rate or more;
a sensing device configured to sense an operation mode and an operation state according to the operation mode; and
a control device configured to implement power-saving operation based on the received electric power information and the operation state sensed by the sensing device,
wherein, when the highly billed power rate time period does not start during operation of a power consuming part required to implement the operation mode, the control device is configured to complete the operation, and
wherein, when the highly billed power rate time period starts during the operation of the power consuming part required to implement the operation mode, the control device is further configured to:
put on standby the operation of the power consuming part until the highly billed power rate time period finishes, if a remaining operation time or a remaining number of cycles of the power consuming part is equal to or larger than a predetermined time or a predetermined number, and
complete the operation during the remaining operation time and the remaining number of cycles, if the remaining operation time or the remaining number of cycles of the power consuming part is smaller than the predetermined time or the predetermined number.

### Claim 2 (depends on 1)

The electric appliance of claim 1, wherein the electric power information further comprises:
changeable unit prices according to a variation of time, or amount of usage of electric power.

### Claim 3 (depends on 2)

The electric appliance of claim 2, wherein the control device controls an operational start of the power consuming part to be put on standby until the highly billed power rate time period finishes, when an expected operation time of the power consuming part required to implement the operation mode overlaps with the highly billed power rate time period.

### Claim 4

A control method of an electric appliance, the method comprising:
receiving electric power information and an operation mode set for an electric appliance, the electric power information including a billed power rate for each time period, a highly billed power rate time period in which the billed power-rate is a predetermined reference rate or more and a non-highly billed power rate time period in which the billed power-rate is a predetermined reference rate or less;
determining whether a current time is in a highly billed rate time period or non-highly billed rate time period; and
controlling an operation of a power consuming part to implement a power-saving mode or the operation mode in consideration of an operation time to implement the operation mode and the highly billed power rate time period,
wherein, when the highly billed power rate time period does not start during operation of a power consuming part required to implement the operation mode, the method further comprises completing the operation, and
wherein, when the highly billed power rate time period starts during the operation of the power consuming part required to implement the operation mode, the method further comprises the steps of:
putting on standby the operation of the power consuming part until the highly billed power rate time period finishes, if a remaining operation time or a remaining number of cycles of the power consuming part is equal to or larger than a predetermined time or a predetermined number, and
completing the operation during the remaining operation time and the remaining number of cycles, if the remaining operation time or the remaining number of cycles of the power consuming part is smaller than the predetermined time or the predetermined number.

### Claim 5 (depends on 4)

The control method of claim 4, wherein the operation mode is implemented in case an operation time of the operation mode is in the non-highly power billed rate time period; and
the power-saving mode consuming lower electric power than the operation mode is implemented, in case the operation time of the operation mode is in the highly billed power rate time period.

### Claim 6 (depends on 4)

The control method of claim 4, wherein operation start of a predetermined power consuming part is controlled to be put on standby until the highly billed power rate time period finishes, when an operation time of the power consuming part required to implement the operation mode overlaps with the highly billed power rate time period.

### Claim 7 (depends on 4)

The control method of claim 4, wherein the electric appliance is a washing machine and start of a washing cycle or rinsing cycle is controlled to be put on standby until the highly billed power rate time period finishes, when the operation time of a washing cycle or rinsing cycle out of the operation mode is in the highly billed power rate time period, as an expected start timing of the washing cycle or the rinsing cycle comes before the highly billed power rate time period start.

### Claim 8 (depends on 6)

The control method of claim 6, wherein the electric appliance is an air conditioner; and
operation start of a compressor is controlled to put on standby until the highly billed rate time period finishes, in case an expected operation time of the compressor is in the highly billed rate time period as the expected start timing comes before the highly billed rate time period.

### Claim 9 (depends on 6)

The control method of claim 6, wherein the electric appliance is a refrigerator; and
operation start of a defrosting heater or ice-maker is controlled to be put on standby until the highly billed rate time period finishes, in case an expected operation time of the defrosting heater or ice-maker is in the highly billed rate time period as an expected start timing of the defrosting heater or ice-maker comes before the highly billed rate time period.

### Claim 10 (depends on 6)

The control method of claim 6, wherein the electric appliance is a cooking appliance; and
operation start of a heater is controlled to be put on standby until the highly billed rate time period finishes, in case an expected operation time of the heater is in the highly billed rate time period as a start timing of the heater comes before the highly billed rate time period.

### Claim 11 (depends on 4)

The control method of claim 4, wherein the electric appliance is a washing machine; and
heating is stopped and the heating is put on standby until the highly billed power rate time period finishes, when the highly billed power rate time period starts during the heating-washing cycle, or a target temperature of heated water is controlled to be lowered.

### Claim 12 (depends on 4)

The control method of claim 4, wherein the electric appliance is a washing machine; and
a rinsing cycle is implemented and that state is controlled to be put on standby until the highly billed power rate time period finishes, when the highly billed power rate time period starts during the rinsing cycle.

### Claim 13 (depends on 4)

The control method of claim 4, wherein the electric appliance is a washing machine; and
only a spinning cycle is implemented without implementing a drying cycle, in case the highly billed power rate time period starts during a main-spinning cycle including a drying cycle and after that, state is controlled to be put on standby until the highly billed power rate time period finishes.

### Claim 14 (depends on 4)

The control method of claim 4, wherein the electric appliance is a washing machine; and
a spinning cycle is implemented and power of the washing machine is controlled to be shut off, when the highly billed power rate time starts during a main-spinning cycle not including a drying cycle.

### Claim 15 (depends on 4)

The control method of claim 4, wherein the electric appliance is a washing machine; and
operation of a heater is stopped and the motor is driven at the lowest speed and the lowest net acting ratio, when the highly billed power rate time period starts during a drying cycle.

### Claim 16 (depends on 4)

The control method of claim 4, wherein the electric appliance is an air conditioner; and in case the highly billed rate time period starts during operation of a compressor, further comprising:
determining whether the remaining operation time of a compressor is a predetermined value or less; and
maintaining a current operation state in case the remaining operation time is a predetermined value or less based on the result of the determination and implementing power-consumption-decreasing operation of the compressor in case the remaining operation time is a predetermined value or more based on the result of the determination.

### Claim 17 (depends on 4)

The control method of claim 4, wherein the electric appliance is a refrigerator; and in case the highly billed rate time period starts during operation of a defrosting heater, further comprising:
determining whether the remaining operation time of the defrosting heater is a predetermined value or less; and
maintaining a current operation state, in case the remaining operation time is the predetermined value or less based on the result of the determination, and implementing power consumption decreasing operation of the defrosting heater in case the remaining operation time is a predetermined value or more based on the result of the determination.

### Claim 18 (depends on 4)

The control method of claim 4, wherein the electric appliance is a cooking appliance; and in case the highly billed rate time period starts during operation of a heater, further comprising:
determining the number of heaters and stopping a predetermined number of the heaters in case a plurality of heaters are provided;
determining whether the remaining operation time of the heater is a predetermined value or less and maintaining a current state in case a single heater is provided; and
decreasing the amount of heat generated by the heater, in case the remaining operation time of the heater is a predetermined value or more.