HYBRID POWER SUPPLY DEVICE OF AIR-CONDITIONER

• US 20150369525A1
• Filed: 06/24/2014
• Published: 12/24/2015
• Est. Priority Date: 06/24/2014
• Status: Active Grant

• Current Assignee: Phoebus Power Technology Co., Ltd., Taro Sue Corporation
• Original Assignee: Phoebus Power Technology Co., Ltd., Taro Sue Corporation
• Inventors: HSIEH, TE-JEN, CHEN, HSIEN-YU, GOZON, ALEXANDER S., LIN, YI-HUEI
• Granted Patent: US 9,621,067 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F25B 2600/021 Inverters therefor
• CPC Class Codes: F25B 27/00 Machines, plants or systems, using particular sources of energy F25B30/06 takes precedence
• CPC Class Codes: F25B 49/025 Motor control arrangements
• CPC Class Codes: H02M 1/007 Plural converter units in cascade push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826
• CPC Class Codes: H02M 3/155 using semiconductor devices only
• CPC Class Codes: H02M 5/44 using discharge tubes or semiconductor devices to convert the intermediate dc into ac
• CPC Class Codes: H02M 7/06 using discharge tubes without control electrode or semiconductor devices without control electrode
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A hybrid power supply device of an air-conditioner for supplying multiple electric power sources to a DC rail of an inverter of a DC brushless motor of the air-conditioner to drive the operation of the DC brushless motor is introduced. Two power sources may be selectively fed into the inverter of the DC brushless motor to provide hybrid power sources to the air-conditioner in a low cost simply by connecting the outputs of two one-way rectifiers. In addition, a voltage boost circuit is provided to program each source as the main power source and a backup power source. With the skillful arrangement of a simple circuit, the air-conditioner achieves the hybrid power supply effect with a multiple of controllable power sources.

Claims

1. A hybrid power supply device of an air-conditioner, for supplying electric power to a DC rail of an inverter of a DC brushless motor of the air-conditioner to provide a multiple of power sources to the DC brushless motor, and the hybrid power supply device comprising:

a first power source input end, connected to an grid AC power of utility power;

a second power source input end, connected to a power source that supplies an AC power or a DC power;

a first one-way rectifier, including a plurality of diodes, and having an input terminal connected to the first power source output end, and an output terminal connected to the input terminal of the inverter for providing a first DC output to the DC rail of the inverter; and

a second one-way rectifier, including a plurality of diodes, and having an input terminal connected to the second power source output end, and an output terminal connected to the output terminal of the first one-way rectifier for providing the second DC output to the DC rail.

2. The hybrid power supply device of claim 1, wherein the first one-way rectifier is a full-bridge rectifier having first and second grid AC power input terminals and first and second rectified DC power output terminals respectively, and the first and second grid AC power input terminals are connected to the first power source output end, and the first and second rectified DC power output terminals are connected to the inverter for providing a first DC output to a DC rail of the inverter;

and the second one-way rectifier is a full-bridge rectifier having first and second input terminals and first and second rectified output terminals, and the first and second input terminals are connected to the second power source output end respectively, and the first and second rectified output terminals are connected to the first and second rectified DC power output terminals of the first one-way rectifier respectively for proving the second DC output to the DC rail;

such that when the voltage level of the first DC output is higher than the voltage level of the second DC output, the DC rail of the inverter will just receive the first AC output only, and if the voltage level of the second AC output is higher than the voltage level of the first DC output, the DC rail of the inverter will just receive the second DC output only.

3. The hybrid power supply device of claim 2, wherein the second power supply device is a diesel power generator that supplies the AC power to the first and second input terminals of the second full-bridge rectifier, and the diesel power generator is turned on by responding to a grid AC power failure.

4. The hybrid power supply device of claim 2, wherein the second power supply device is a photovoltaic panel set that supplies the DC power to the first and second input terminals of the second full-bridge rectifier.

5. The hybrid power supply device of claim 2, wherein the second power source supplies the DC power and further comprises a voltage boost circuit installed between the second power source output end and the second rectifier input end, and the voltage boost circuit boosts the voltage of the DC power to a predetermined high voltage level, such that the DC rail of the inverter just receives the second DC output only, if the voltage level of the DC power supplied by the second power source is lower than the voltage level of the first DC output, and the predetermined high voltage level is higher than the voltage level of the first DC output.

6. The hybrid power supply device of claim 5, wherein the second power supply device is a photovoltaic panel set for supplying the DC power to the voltage boost circuit.

7. The hybrid power supply device of claim 2, wherein the second power source supplies the DC power, and the second power source further includes a voltage boost circuit installed between the second power source and the second rectifier input end, and the voltage boost circuit is provided for boosting the voltage of the DC power supplied to the second power source to a predetermined low voltage level, such that the DC rail of the inverter just receives the first DC output only, and the predetermined low voltage level is slightly lower than the voltage level of the first DC output.

8. The hybrid power supply device of claim 7, wherein the second power supply device is a battery bank for supplying the DC power to the voltage boost circuit for the use as backup power.