Power source input device for both ac and dc power sources

Patent metadata

Field	Value
Publication number	US-10951029-B2
Application number	US-201816132710-A
Country	US
Kind code	B2
Filing date	Sep 17, 2018
Priority date	Sep 19, 2017
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A power source input device for both AC/DC power sources includes a first power source input unit that is provided at a power source input terminal of an electric power device to convert an AC or DC commercial power source selectively input from the outside into a DC driving power source and supply the converted DC driving power source to an accessory device. A second power source input unit is provided in the accessory device to supply the DC driving power source supplied from the first power source input unit to at least one load, thereby simplifying a configuration of a power source input terminal of each of the electric power devices and reducing a manufacturing cost thereof.

First claim

What is claimed is:

1. A power source input device for both alternating current (AC) and direct current (DC) power sources, comprising:
a first power source input unit that is provided at a power source input terminal of an electric power device to convert an AC or DC commercial power source selectively input from the outside of the first power source input unit into a DC driving power source and supply the converted DC driving power source to an accessory device; and
a second power source input unit that is provided in the accessory device to supply the DC driving power source supplied from the first power source input unit to at least one load,
wherein the first power source input unit comprises:
a power source input unit that receives the AC or DC commercial power source;
a filter circuit unit that filters the AC or DC commercial power source;
a rectification circuit unit that rectifies the filtered AC or DC commercial power source;
an amplification circuit unit that amplifies a voltage of the rectified AC or DC commercial power source;
a smoothing capacitor that smoothes the amplified AC or DC commercial power source so that a DC driving power source is output;
an output converter that supplies the DC driving power source to a self load,
a sensing circuit unit that senses the AC or DC commercial power source rectified by the rectification circuit unit to output whether the rectified commercial power source is an AC commercial power source or a DC commercial power source; and
a conversion setting unit that applies a switching signal to the amplification circuit unit so that the amplification circuit unit performs a boost converting operation when the AC commercial power source is sensed, and that turns off the switching signal so that the amplification circuit unit does not perform the boost converting operation when the DC commercial power source is sensed.

2. The power source input device of claim 1 ,
wherein the first power source input unit is provided with at least one AC/DC conversion circuit and an output circuit of the DC driving power source, and
wherein the second power source input unit is provided with a DC circuit to supply the DC driving power source to the at least one load.

3. The power source input device of claim 1 ,
wherein the power source input device comprises:
an AC power source input unit that receives an AC power source through an AC power source input cord; and
a DC power source input unit that receives a DC power source through a DC power source input cord.

4. The power source input device of claim 1 ,
wherein the smoothing capacitor comprises a film type capacitor that has a capacity ranging from 5 μF to 30 μF to smooth the amplified AC or DC commercial power source so that a DC driving power source is output.

5. The power source input device of claim 1 ,
wherein, when the sensing circuit unit senses a DC commercial power source, the conversion setting unit determines whether a voltage of the sensed DC commercial power source is greater than or less than a threshold voltage required for driving a motor or an outdoor unit load, and outputs the switching signal so that the amplification circuit unit operates or does not operate as a boost converter based on a result of the determination.

6. The power source input device of claim 1 ,
wherein the second power source input unit comprises:
a second communication unit that shares control information of a first communication unit of the first power source input unit, a ventilation fan, a control board and a display device; and
a DC/DC converter that converts a DC driving power source input from the first power source input unit in accordance with driving voltages of the control board and the display device.

Assignees

• Lg Electronics Inc

Inventors

• Kim Kyung Min
• An Joonsik

Classifications

• H02J2101/24

  Photovoltaics · CPC title

• H02J3/02 Primary

  using a single network for simultaneous distribution of AC power at different frequencies · CPC title

• F24F11/88 Primary

  Electrical aspects, e.g. circuits · CPC title

• H02J3/381

  Dispersed generators · CPC title

• H02M1/10 Primary

  Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC · CPC title