METHOD AND DEVICE FOR CONTROLLING OPERATION OF HEAT PUMP UNIT

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United States of America Patent

SERIAL NO

13886452

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Abstract

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The temperature of high-temperature water at the exit of a condenser is maintained to be within a setting range by control of, under an operation with all cylinders, capacity of a reciprocating compressor in the period between a maximum allowable load and a minimum load for lubrication, at which the flow of a lubrication oil pump is ensured, based on the revolution-speed control of a drive motor that drives the reciprocating compressor and by control of the capacity of the reciprocating compressor at the minimum load for lubrication or less based on the combination of the control of decreasing the number of operation cylinders and the revolution-speed control of the drive motor. In addition, a heating mechanism is provided on an inlet path of the reciprocating compressor to prevent the liquefied refrigeration flow of a refrigerant liquid to the reciprocating compressor during the operation or at the start.

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Patent Owner(s)

Patent OwnerAddress
MAYEKAWA MFG CO LTD14-15 BOTAN 3-CHOME KOTO-KU TOKYO 1358482 JAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
ARATA, Noriyuki Tokyo, JP 1 5
FUKANO, Shuji Tokyo, JP 5 35
KUDO, Takanori Tokyo, JP 41 577
NAKAJIMA, Hisashi Tokyo, JP 75 1625
USHIROKAWA, Hiroshi Tokyo, JP 1 5

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