Patent ID: 7272943

Claim:
A control method for a multiple heat pump having multiple indoor units connected to an outdoor unit, the indoor units being controlled to operate in a cooling or heating mode, the method comprising: opening a bypass valve to permit part of a refrigerant passing through a refrigerant pipe connected between tile indoor units and the outdoor unit to be diverted and compressors supplied to an acctunulator after being expanded by passing through a capillary tube and increasing an opening degree of electronic expansion valves of shutdown indoor units if an outlet temperature of the compressors is higher than a first preset temperature, in a state in which at least one of the multiple indoor units operates in the heating mode; and returning the opening degree of the electronic expansion valves of the shutdown indoor units to a standard opening degree if the outlet temperature of the compressors is below a second preset temperature, during increase of the opening degree of the electronic expansion valves.