초록 ▼

A combine including an improved HVAC control system. The frame of the combine supports an operator cab, a harvesting head and the other operational systems of the combine. The control system includes an operator control and a heat exchanger located in the cab. The control system also includes at lea

A combine including an improved HVAC control system. The frame of the combine supports an operator cab, a harvesting head and the other operational systems of the combine. The control system includes an operator control and a heat exchanger located in the cab. The control system also includes at least one sensor disposed to sense at least one of an ambient air temperature, a cab air temperature and solar loading, and to produce at least one sensed signal representative thereof. The operator control is configured to produce a set-point signal representative of a desired cab air temperature. An interface circuit is electromagnetically coupled to the valve assembly, the operator control, and the at least one sensor. A cooling coil may also be located in the cab, wherein the interface circuit is electromagnetically coupled to the associated coolant compressor. The interface circuit produces a temperature differential based upon a comparison of the set-point signal to the at least one sensed signal and applies the electrical control signals to the valve, compressor and blower based upon the temperature differential to achieve the desired cab air temperature and minimize cab air temperature oscillations.

대표청구항 ▼

[ What is claimed is:] [1.] An agricultural vehicle comprising:a frame supported by a plurality of wheels;an agricultural implement supported by the frame;an operator cab supported by the frame;a fluid source;a first heat exchanger located in the cab and configured to transfer varying amounts of hea

[ What is claimed is:] [1.] An agricultural vehicle comprising:a frame supported by a plurality of wheels;an agricultural implement supported by the frame;an operator cab supported by the frame;a fluid source;a first heat exchanger located in the cab and configured to transfer varying amounts of heat energy;an electrically operated fluid control assembly including at least one electrical input and disposed to couple the fluid source to the heat exchanger to control a flow of fluid between the fluid source and the heat exchanger in response to electrical control signals applied to the electrical input;an operator control located in the cab and including an operator interface configured to produce a set-point signal representative of a desired cab temperature set by an operator at which the air in the cab is to be maintained and providing an output indicative thereof;at least one sensor disposed to sense at least one of an ambient air temperature, a cab air temperature and solar loading, and configured to produce at least one sensed signal representative thereof; andan interface circuit electromagnetically coupled to the fluid control assembly, the operator control and the at least one sensor, wherein the interface circuit produces a temperature difference based upon a comparison of the set-point signal to the at least one sensed signal and applies the electrical control signals to the fluid control assembly based upon the temperature difference to achieve the desired cab temperature and minimize cab air temperature oscillations.