DC-powered HVAC system
AssigneeDometic Corporation
InventorsKendall Allen, Ralph G. Bailey
Life of this patent
Estimating the term…
Abstract
An HVAC system for a motorized vehicle or vessel is provided that includes a variable-speed compressor, a variable-speed condenser fan and a variable-speed evaporator fan. The HVAC system further includes a DC-power system for supplying DC power to the variable-speed compressor, the variable-speed condenser fan and the variable-speed evaporator fan regardless if the mobile unit's engine is operating or not operating. A controller and an operator interface are also provided for controlling the operation of the HVAC system.
Claims6
A variable-speed HVAC system for a mobile unit having an engine, the variable-speed HVAC system comprising:
- a variable-speed compressor;
- a variable-speed evaporator fan;
- a controller for controlling the operation of the variable-speed HVAC system;
- a first DC-power source having a DC battery to start the mobile unit's engine;
- a second DC-power source having a DC battery connected to the first DC-power source;
- a speed-control circuit having a plurality of speed-control sub circuits;
- a condenser having a discharge line;
- a variable-speed condenser fan;
- and
- a temperature sensor connected to the variable-speed condenser fan;
- wherein the second DC-power source provides DC power to the variable-speed compressor and the variable-speed evaporator fan when the mobile unit's engine is not operating,
- wherein each speed-control sub circuit limits each speed of the variable-speed compressor to a specific speed of the variable-speed evaporator fan,
- wherein the temperature sensor measures a temperature of the condenser discharge line, and
- wherein if the measured temperature of the condenser discharge line is below a predetermined temperature then the variable-speed condenser fan will operate at a first speed and if the temperature of the condenser discharge line is above the predetermined temperature, then the variable-speed condenser fan will operate at a second speed that is lower than the first speed.
Dependencies are inferred from the claim text.