Abstract: A HVAC unit includes a housing, at least one flap and an actuator corresponding to the flap. The housing includes a first and a second portion and defining an enclosure “E”. The flap is received inside the housing with a first extreme end thereof engaging with the first portion and a second extreme end thereof engaging with the second portion of the housing via an intermediate lever. The actuator disposed outside the enclosure “E” is connected to and drives the flap via the intermediate lever. The intermediate lever includes a stopper radially extending from at least a portion of a periphery thereof. The stopper is disposed between the second portion of the housing and the flap to limit axial movement of the intermediate lever.

Abstract: A HVAC unit includes a housing, at least one flap and an actuator corresponding to the flap. The housing includes a first and a second portion and defining an enclosure “E”. The flap is received inside the housing with a first extreme end thereof engaging with the first portion and a second extreme end thereof engaging with the second portion of the housing via an intermediate lever. The actuator disposed outside the enclosure “E” is connected to and drives the flap via the intermediate lever. The intermediate lever includes a stopper radially extending from at least a portion of a periphery thereof. The stopper is disposed between the second portion of the housing and the flap to limit axial movement of the intermediate lever.

Abstract: An HVAC blower motor (10) includes a stator (12) and a rotor (14). The stator (12) include electro-magnets (12a) energized at pre-determined energizing frequency. The rotor (14) angularly moves relative to the stator (12) due to pulsating magnetic field between the stator (12) and the rotor (14). The rotor (14) includes an output shaft (24), a magnet holder (14a) and a plurality of permanent magnets (20). The permanent magnets (20) are configured to interact with the cyclically energized electro-magnets (12a) to cause pulsating magnetic field between the stator (12) and the rotor (14) to cause angular movement of the rotor (14) relative to the stator (12). The magnet holder (14a) includes a strip (15) of vibration damping material secured thereto along an outer periphery thereof to change the natural frequency characteristic of the wall portion 14c is subjected to.

Abstract: A HVAC unit includes a housing, at least one flap and an actuator corresponding to the flap. The housing includes a first and a second portion and defining an enclosure “E”. The flap is received inside the housing with a first extreme end thereof engaging with the first portion and a second extreme end thereof engaging with the second portion of the housing via an intermediate lever. The actuator disposed outside the enclosure “E” is connected to and drives the flap via the intermediate lever. The intermediate lever includes a stopper radially extending from at least a portion of a periphery thereof. The stopper is disposed between the second portion of the housing and the flap to limit axial movement of the intermediate lever.

Abstract: An HVAC air inlet housing for a vehicle includes an air inlet housing having a top portion and a bottom portion. A fresh air duct, to convey fresh air from an air inlet to a blower, is defined by the air inlet housing. A water inlet port, to connect to an evaporator drain port via a hose, is defined in the bottom portion. The hose is to convey water from the evaporator drain port to the water inlet port. A water tunnel is defined by the air inlet housing to convey water from the water inlet port to a sluice defined in the bottom portion. The sluice is to convey water from the water tunnel to a sump defined in the bottom portion. A sump drain port is defined in the air inlet housing bottom portion in fluid communication with the sump to drain water from the sump.

Abstract: An HVAC module for a vehicle includes an upper airflow from an evaporator having an upper hot branch through a heater core and an upper cold branch that bypasses the heater core. A lower airflow from the evaporator has a lower hot branch through the heater core and a lower cold branch that bypasses the heater core. An upper barrel door is to select an upper blend setting of the upper airflow directed through the upper hot branch and through the upper cold branch. A lower barrel door is to select a lower blend setting of the lower airflow directed through the lower hot branch and through the lower cold branch. The upper hot branch and the lower hot branch are connected to a rear duct connected to an upper blend zone. The upper cold branch feeds the upper blend zone. The lower cold branch feeds the rear duct.

Abstract: A fluid flow controller includes a housing defining a first and a second fluid path. A first door is in the first fluid path to selectably control a first flow through the first fluid path in response to a rotation of a first lever. A second door is in the second fluid path to selectably control a second flow through the second fluid path in response to a rotation of a second lever. A flexible kinematic link is to connect an actuator arm rotatable about an actuator arm axis to the first lever via first pin joints for rotation of the first door about the first pivot axis. A flexible link length is responsive to a compressive and a tensile load. A rigid link is to connect the actuator arm to the second lever via second pin joints for rotation of the second door about the second pivot axis.

Abstract: An injection molded housing includes a first piece, a second piece, and a wall defined by the first piece removably joined to the second piece by a joint at abutting surfaces of the first piece and the second piece. A central catch is integrally molded with the first piece, protruding from the wall. A latch is integrally molded with the second piece, and connected to the second piece first and second living hinges. A half-knuckle is integrally molded with the second piece, protruding from the wall. A hinge pin is fixedly attached to the latch. The latch is bendable at the living hinges to align the hinge pin with the half-knuckle. The latch is rotatable about the hinge pin to engage the central catch and selectably prevent the first piece from being disengaged from the second piece.

Abstract: A heater core includes a plurality of plate pairs. Each plate pair defines a respective fluid flow chamber. Each plate pair has a proximal plate defining a respective proximal plate plane and a distal plate defining a respective distal plate plane. Each of the proximal plate planes and the distal plate planes are parallel. Each plate pair has bilateral symmetry about a medial plane orthogonal to the proximal plate planes. A circular inlet aperture is defined in each respective proximal plate and each respective distal plate of the plurality of plate pairs. Each inlet aperture has a center on the medial plane. The inlet apertures are aligned on a common inlet aperture axis. A circular outlet aperture is defined in each respective proximal plate and each respective distal plate of the plurality of plate pairs. Each outlet aperture has a center on the medial plane.

Abstract: A HVAC system includes a housing including at least one wall, an air flow path defined at least partially by the at least one wall, and a door disposed in the air flow path, where the door is configured to i) block a flow of air through the air flow path when the door is in at least one closed position, and ii) allow the flow of air through the air flow path when the door is in a position other than the at least one closed position. A gap is formed between the door and the at least one wall when the door is in the position other than the at least one closed position. The HVAC system further includes a noise-reducing feature defined on at least a portion of the at least one wall. The noise-reducing feature configured to break up, into several smaller structures, an air flow structure formed when air flowing through the gap contacts an end of the door, thereby reducing air vibration in the gap and reducing noise of the HVAC system during operation thereof.

Abstract: A valve includes a housing defining a flow path having three ports. A door in the flow path selectably controls a flow through the flow path in response to a rotation of a lever. Three seal flanges, each define one of the three ports. The door has three selectable closed positions including a first port closed position, a second port closed position, and a third port closed position. A resilient seal is compressed between a sealing face of the door and each of the three seal flanges respectively in turn when the door is in each of the closed positions. The door has a first pivot axis and a second pivot axis parallel to and spaced from the first pivot axis. The door is alternatively rotatable about the first pivot axis and the second pivot axis to selectably close, each individually and separately in turn, the three ports.

Abstract: A water separator reduces a water content of an air stream, which is used in an HVAC unit for a vehicle. The water separator includes a diverter wall and an adjacent wall spaced from the diverter wall to define an air passage. The diverter wall has a terminal end extending into the air passage for changing a direction of the air stream flowing through the air passage to separate water droplets from the air stream to reduce the water content of the air stream. A gutter is coupled to the terminal end of the diverter wall and extends into the air passage. The gutter defines a drainage channel configured to receive the water droplets that form on the diverter wall for preventing the water droplets from reentering the air stream flowing through the air stream passage.

Abstract: A water separator reduces a water content of an air stream, which is used in an HVAC unit for a vehicle. The water separator includes a diverter wall and an adjacent wall spaced from the diverter wall to define an air passage. The diverter wall has a terminal end extending into the air passage for changing a direction of the air stream to reduce the water content of the air stream. A filter assembly is disposed through a receiving slot in the diverter wall and is within the air passage downstream of the terminal end.

Abstract: A method for adjusting a natural refrigeration cycle rate of an air conditioner includes monitoring a time between at least two sequential refrigeration “off” events or at least two sequential refrigeration “on” events, and determining whether the time is below or above a predetermined time. If the time is below the predetermined time, the method further includes increasing a refrigeration “on” temperature threshold. If, however, the time is above the predetermined time, the method further includes decreasing the refrigeration “on” temperature threshold.

Abstract: At a housing, a first gas passage I and a second gas passage II extending along the axial direction, a third gas passage III formed substantially symmetrical to the first gas passage I relative to a plane containing a drive shaft, a fourth gas passage IV formed substantially symmetrical to the second gas passage II and communicating with the second gas passage II and an external component that includes an intake port and an outlet port are disposed. Either the first gas passage or the third gas passage is made to communicate with the intake port to supply a working fluid to a front-side intake chamber and a rear-side intake chamber, and either the second gas passage or the fourth gas passage is made to communicate with a front-side outlet chamber and a rear-side outlet chamber with the gas passage not in communication with the outlet chambers made to communicate with the outlet port.

Abstract: The present invention relates to HVAC units with condensate drainage systems, for use in motorized vehicles. The present invention provides for at least two or dual condensate drain paths with no extra parts required pre-distribution of the treated air from the HVAC unit, the drainage means or channel situated to allow condensate to ‘fall back’ or, to run upstream back from the evaporator in the opposite direction to the air in the main airflow or stream which continues to run downstream from the drainage area to be conditioned by the heat exchanger.

Abstract: An HVAC unit having a multiple air valve unit comprising two air valve devices sharing at least one common rotation axis is described. Concentric air valve device shafts interface with a common actuation device in such way to allow for rotational motion between the actuation device and the air valve device unit, and to allow to air valve devices to control or distribute air into three or more air outlets of the HVAC unit.

Abstract: A ventilating air and airflow control in a ventilating, heating or air conditioning system is provided. A structure and method to provide air flow mixture via an air mixer structure or ‘baffle’ located within a blend door are provided. The simplified HVAC unit provides a baffle/blend door assembly comprising an air mixer structure wherein the attachment means of baffle and barrel door is such that it provides for ease of assembly. The baffle/barrel door assembly provides for smaller packaging volume with the same functionality as larger HVAC units.

Abstract: The present invention relates to arrangement of devices, and, in particular doors, in the architecture of HVAC units. Where space is a consideration, having doors that are common and/or that can be used or nested in a common operative space, reduce the need of inventory of different parts, and allow for use of smaller interior HVAC space volumes in HVAC units.

Abstract: A door decelerator system reduces or prevents undesirable limits of audible door noise in an HVAC unit. The system includes a door, movable between end or stop positions; and a kinematics lever connected to the door at a common axis of rotation or the kinematics lever having a deceleration axis common with the door, the kinematics lever having a deflection area incorporated therein. A rigid rib is incorporated in a housing of the HVAC unit, the rigid rib disposed in compressive contact with the deflection area at least as the kinematics lever reaches an end of travel. The deflection area is physically separable from the rigid rib.