Tractor Cab Heating and Ventilating Systems
First Claim
1. A tractor cab HVAC system having an HVAC unit which receives and processes fresh air drawn in via an air intake and recirculated air from at least one recirculation duct;
- at least one air distribution duct through which processed air from the HVAC unit is introduced into the cab;
a first blower which primarily distributes processed air from the HVAC unit to the distribution duct, and a second blower which selectively draws air into the HVAC unit through the air intake and/or recirculation duct.
1 Assignment
0 Petitions
Accused Products
Abstract
A tractor cab HVAC system having an HVAC unit (11) which receives and processes fresh air drawn in via an air intake (43) and recirculated air from at least one recirculation duct (47). The system has at least one air distribution duct (27,28) through which processed air from the HVAC unit is introduced into the cab. A first blower (23) is provided which primarily distributes processed air from the HVAC unit (11) to the distribution duct (27,28), and a second blower (22) which selectively draws air into the HVAC unit (11) through the air intake (43) and/or re-circulation duct (47). The ratio of fresh air to recirculated air drawn into the HVAC unit (11) by the second blower (22) is variable by one or more flaps (60,62) which control the flow of air into the HVAC unit (11) through the air intake (43) and circulation duct (47).
22 Citations
8 Claims
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1. A tractor cab HVAC system having an HVAC unit which receives and processes fresh air drawn in via an air intake and recirculated air from at least one recirculation duct;
- at least one air distribution duct through which processed air from the HVAC unit is introduced into the cab;
a first blower which primarily distributes processed air from the HVAC unit to the distribution duct, and a second blower which selectively draws air into the HVAC unit through the air intake and/or recirculation duct. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- at least one air distribution duct through which processed air from the HVAC unit is introduced into the cab;
Specification