US 5,200,644 A · Air conditioning system having battery for increasing efficiency

Abstract

An air conditioning system comprises a converter for converting a commercial AC into DC, an inverter for reconverting the DC into an AC having a predetermined frequency corresponding to an air conditioner load, a compressor driven with the AC from the inverter under a compressor capacity control operation matching the load, a battery used for dealing with a voltage drop of the supply power from the commercial AC power source and for supplying a DC different from the DC converted by the converter to the inverter via a switching element, and a discharge control unit for controlling the switching element in the manner that the battery supplies a current having a predetermined value proportional to a difference between the AC supplied from the power source to the converter and a preset current value.

Claims20

Dependent claims

An air conditioning system comprising:

a converter for converting a first alternating current from a commercial alternating current power source into a first direct current,
an inverter for re-converting said first direct current into a second alternating current having a predetermined frequency corresponding to an air conditioner load,
a compressor driven with said second alternating current output by said invertor,
a battery for supplying a second direct current to said invertor through a switching element, and
a discharge control unit for controlling said switching element so that said battery supplies a magnitude of said second direct current corresponding to a difference between said first alternating current supplied from said power source to said converter and a preset current value when said first alternating current exceeds said preset current value.

2 more elements

An air conditioning system comprising;

a converter for converting a first alternating current from a commercial alternating current power source into a first direct current,
an inverter for re-converting said first direct current into a second alternating current having a predetermined frequency corresponding to an air conditioner load,
a compressor driven with said second alternating current output by said inverter,
a battery for supplying a second direct current to said inverter through a switching element, and
a discharge control unit for controlling said switching element so that said battery supplies a magnitude of said second direct current corresponding to a difference between said first alternating current supplied from said power source to said converter and a preset value;
wherein discharge of said battery is inhibited when a voltage value of said first alternating current from said power source applied to said converter is smaller than an allowable minimum value which would subject said battery to excessive discharge.

3 more elements

Dependencies are inferred from the claim text.

Air conditioning system having battery for increasing efficiency

Life of this patent

Air conditioning system having battery for increasing efficiency

Life of this patent

Abstract

Claims20