Heat exchange – With alarm – indicator – signal – register – recorder – test or... – Remotely controlled inspection means
Patent
1993-11-24
1994-10-18
Ford, John K.
Heat exchange
With alarm, indicator, signal, register, recorder, test or...
Remotely controlled inspection means
165 481, 165119, 60453, 60454, 210138, 210181, F25B 2900
Patent
active
053559398
ABSTRACT:
An air conditioning system for a motor crane includes a heating circuit and a refrigerating circuit. The heating circuit comprises a hydraulic motor, a hydraulic pump, a radiator and a valve mechanism causing a pressure difference in the hydraulic oil flowing therethrough. The refrigerating circuit includes a compressor connected to the hydraulic motor and a condenser having a fan for forcing air thereover. The heating circuit is at least partially disposed in an air path in which the condenser is disposed. When the hydraulic oil bypasses the valve mechanism, a control device turns the fan on if the refrigerating circuit is not operating, and the temperature of the hydraulic oil sensed by the sensor reaches a predetermined temperature. Further, the system includes a filter downstream of the valve mechanism and a control device for reducing the pressure loss across the valve mechanism to a minimum for a predetermined time when hydraulic oil initially begins flowing through the heating circuit upon start up of the mobile crane.
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Ford John K.
Sanden Corporation
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