US Patent No. 10,172,259

METHOD AND APPARATUS FOR REGULATING A COOLING DEVICE FITTED TO A SWITCHGEAR CABINET


Patent No. 10,172,259
Issue Date January 01, 2019
Title Method And Apparatus For Regulating A Cooling Device Fitted To A Switchgear Cabinet
Inventorship Ralf Schneider, Herborn (DE)
Michael Scholl, Herborn (DE)
Steffen Wagner, Burbach (DE)
Michael Maage, Ehringshausen (DE)
Assignee

Claim of US Patent No. 10,172,259

1. A method for regulating a cooling device fitted in or to a switchgear cabinet with built-in components that produce dissipated heat mounted within the interior of the switchgear cabinet, the built in components comprising device fans for regulating airflow within the switchgear cabinet, the cooling device including an interior fan for generating an interior air flow through an evaporator and providing cooling air to the interior of the switchgear cabinet, comprising:detecting the temperature of the air within the interior of the switchgear cabinet; and
regulating the cooling device in response to the detected temperature such that if the detected temperature of the switchgear cabinet interior air exceeds an upper setpoint temperature, the interior fan of the cooling device is switched on, and if the detected temperature falls below a lower setpoint temperature, the interior fan of the cooling device is switched off,
wherein, when the interior fan has been switched off owing to the detected temperature falling below the lower setpoint temperature, an intermittent time-controlled mode of operation is started and the interior fan is switched on after a predetermined first time duration following the start of the intermittent time-controlled mode of operation, and remains on for a second predetermined time duration following the end of the first time duration, and is switched off again if the detected temperature is still below the upper setpoint temperature at the end of the second time duration, and
wherein the intermittent time-controlled mode of operation of the interior fan is cyclically repeated until the upper setpoint temperature is exceeded, after which the interior fan is operated in continuous operation, and
wherein the intermittent time-controlled mode is started anew if the detected temperature falls below the lower setpoint temperature, and
wherein airflow within the switchgear cabinet is supported by the device fans independent of the interior fan being switched on or off.