Air treatment apparatus
AssigneeAGCO International GmbH
InventorsDietmar Haf, Alexander Zeller, Michael Krösser
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Abstract
An air filtration system for an operator environment of an agricultural vehicle including at least one external inlet, a first filtration device having a coarser level of filtration located between the external inlet and an HVAC system, a second filtration device having a second finer level of filtration and an associated blower located between the external inlet and the HVAC system where the air filtration system selectively connects either the first filtration device to the HVAC system blower or the second filtration device and its associated blower to the HVAC system blower and a bypass permanently connects the HVAC system blower and the second filtration device.
Claims20
An air treatment apparatus for an operator environment of an agricultural vehicle comprising:
- an HVAC system comprising:
- an inlet plenum;
- a blower;
- and
- an outlet to the operator environment,
- an air filtration system comprising:
- at least one external inlet;
- a first filtration device comprising a first coarser level of filtration located between the at least one external inlet and the HVAC inlet plenum;
- a second filtration device having a second finer level of filtration located between the at least one external inlet and the HVAC inlet plenum;
- an air filtration system blower connected to the HVAC inlet plenum;
- a valve mechanism configured to selectively connect either the first filtration device to the HVAC inlet plenum or the second filtration device to the HVAC inlet plenum, wherein the valve mechanism is located between the air filtration blower and the HVAC inlet plenum;
- and
- a bypass permanently connected at a first end downstream of the valve mechanism and at a second end adjacent the second filtration device and the valve mechanism, and configured such that when the first filtration device is connected with the HVAC system inlet plenum, a portion of air flow from the first filtration device downstream of the valve mechanism is recirculated through the bypass to purge the second filtration device.
An air treatment apparatus for an operator environment of an agricultural vehicle comprising:
- an HVAC system comprising:
- an inlet plenum;
- a blower;
- and
- an outlet to the operator environment,
- an air filtration system comprising:
- at least one external inlet;
- a first filtration device comprising a first coarser level of filtration located between the at least one external inlet and the HVAC inlet plenum;
- a second filtration device having a second finer level of filtration located between the at least one external inlet and the HVAC inlet plenum;
- an air filtration system blower connected to the HVAC inlet plenum;
- a valve mechanism configured to selectively connect either the first filtration device to the HVAC inlet plenum or the second filtration device to the HVAC inlet plenum;
- a bypass permanently connected at a first end downstream of the valve mechanism and at a second end adjacent the second filtration device and the valve mechanism, and configured such that when the first filtration device is connected with the HVAC system inlet plenum, a portion of air flow from the first filtration device downstream of the valve mechanism is recirculated through the bypass to purge the second filtration device;
- and
- wherein all the first end of the bypass is connected to the air filtration blower.
Dependencies are inferred from the claim text.