Carrier Corporation

Nicolas Pondicq-Cassou

Tobias H Sienel

Yu Chen

Julio I Concha

Lili Zhang

Young Kyu Park

Sascha Hellmann

Jeffrey James Nieter

Bryan A Eisenhower

Jean-Philippe Goux

Sylvain Serge Douzet

Barnabe Landron

Micael Antonsson

Philippe Gastaldi

A water heater is provided by a refrigerant cycle, in which the gas cooler is utilized to heat the water. A drain is incorporated into a water circuit for draining all of the water outwardly of the circuit when the system is shut down. In a preferred embodiment, a water outlet of the gas cooler is at the vertically lowermost portion of the water circuit. A drain valve is placed in this vertically lowermost location such that the water can be easily drained.

Transcritical heat pump water heater with drainage

Refrigerant is circulated through a vapor compression system including a compressor, a gas cooler, an expansion device, and an evaporator. When a sensor detects that frozen water droplets form on the evaporator, a valve positioned between the discharge of the compression and inlet of expansion device is opened. Refrigerant from the discharge of the compressor bypasses the gas cooler and enters the inlet of the expansion device. The high temperature refrigerant melts the frost on the evaporator. As the frost melts, the passage of the evaporator is opened to allow air to flow through the evaporator.

Defrosting methodology for heat pump water heating system

A method of detecting and diagnosing operating conditions for a heat pump water heating system includes the steps of monitoring system operating conditions and comparing actual operating conditions to predicted operating conditions. The predicted operating conditions are based on expected pressures and temperatures given current system inputs. A difference between the actual and expected values for refrigerant pressures and temperature outside a desired range provides indication of a fault in the system. The system controller initiates a prompt to alert of the need for maintenance and direct to potential causes.

Method of controlling a carbon dioxide heat pump water heating system

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Lyons, France

Nicolas Pondicq-Cassou