Abstract: A sound damper and associated system are disclosed for damping sound. In embodiments, the sound damper is utilized within an automotive HVAC system. A passage wall defines an air passageway that transmits air. The sound damper includes a micro perforated panel (MPP) located within an opening formed into a passage wall. A back wall is spaced from the MPP, and a cavity is provided between the back wall and the MPP that is outside the air passageway. In embodiments, the MPP can be covered by a non-perforated film that is acoustically transparent and air impermeable.

Abstract: A blower assembly for an airflow medium, such as in a heating, ventilation, and air conditioning (HVAC) system. The blower assembly has a case defining an airflow inlet and an airflow outlet. An airflow generator is mounted within the case. Rotation of the airflow generator draws airflow into the case through the airflow inlet, directs airflow through the case, and pushes airflow out of the case through the airflow outlet. The motor is entirely within the case and is mounted on an upstream side of the airflow generator with respect to direction of airflow produced by the airflow generator through the case.

Abstract: A sound damper and associated system are disclosed for damping sound. In embodiments, the sound damper is utilized within an automotive HVAC system. A passage wall defines an air passageway that transmits air. The sound damper includes a micro perforated panel (MPP) located within an opening formed into a passage wall. A back wall is spaced from the MPP, and a cavity is provided between the back wall and the MPP that is outside the air passageway. In embodiments, the MPP can be covered by a non-perforated film that is acoustically transparent and air impermeable.

Abstract: A sound suppression chamber for a heating, ventilation and air conditioning (HVAC) air handling assembly including a first end, a second end, and a middle portion. The first end includes an aperture that resonates with airflow from the HVAC air handling assembly, the airflow from the HVAC air handling assembly generating an incident sound wave corresponding to a target tone. The second end is closed and opposite the first end. The middle portion extends between the first end and the second end. The first end, the second end, and the middle portion defining a cavity of the sound suppression chamber. The sound suppression chamber generates a reflected wave that is 180 degrees out of phase from the incident sound wave and reflected into the HVAC air handling assembly through the aperture to suppress the target tone.

Abstract: A sump for an evaporator is disclosed. The sump may comprise: a sump housing comprising an upper end and a lower end, wherein the upper end comprises an opening and the lower end comprises a floor having a drain; and a tray located within the opening, wherein the tray comprises a base and a plurality of partitions extending from the base towards the floor, wherein the plurality of partitions divide the sump housing into chambers in acoustic communication with one another via a gap at a distal end of each of the plurality of partitions, wherein each gap defines a spacing between the respective partition and the floor, wherein, when noise enters via the drain, the sump housing and tray reduce acoustic noise which exits the sump.

Abstract: A heating, ventilation, and air conditioning (HVAC) system including a refrigerant line configured to carry refrigerant. A sound wave generator is in cooperation with the refrigerant line to introduce sound waves into the refrigerant line.

Abstract: A blower assembly for an airflow medium, such as in a heating, ventilation, and air conditioning (HVAC) system. The blower assembly has a case defining an airflow inlet and an airflow outlet. An airflow generator is mounted within the case. Rotation of the airflow generator draws airflow into the case through the airflow inlet, directs airflow through the case, and pushes airflow out of the case through the airflow outlet. The motor is entirely within the case and is mounted on an upstream side of the airflow generator with respect to direction of airflow produced by the airflow generator through the case.

Abstract: A motor for driving a fan in a heating and/or cooling system includes a motor body, a motor cover, and an isolator. The isolator damps vibrations passed from the motor body to the motor cover. The isolator includes two isolating elements connected by a bridge. At least one of the two isolating elements includes at least two corners in a cross-sectional view.

Abstract: A brushless motor for a heating, ventilation, and air conditioning (HVAC) system. The brushless motor includes a rotor and a stator. The rotor has an odd number (X) of magnets. The stator defines an odd number (Y) of slots, each including a plurality of fractional-pitch phase windings. The brushless motor has a fundamental order that is (X·Y)/2, which is a non-integer number.

Abstract: A motor for driving a fan in a heating and/or cooling system includes a motor body, a motor cover, and an isolator. The isolator damps vibrations passed from the motor body to the motor cover. The isolator includes two isolating elements connected by a bridge. At least one of the two isolating elements includes at least two corners in a cross-sectional view.

Abstract: A sound suppression chamber for a heating, ventilation and air conditioning (HVAC) air handling assembly including a first end, a second end, and a middle portion. The first end includes an aperture that resonates with airflow from the HVAC air handling assembly, the airflow from the HVAC air handling assembly generating an incident sound wave corresponding to a target tone. The second end is closed and opposite the first end. The middle portion extends between the first end and the second end. The first end, the second end, and the middle portion defining a cavity of the sound suppression chamber. The sound suppression chamber generates a reflected wave that is 180 degrees out of phase from the incident sound wave and reflected into the HVAC air handling assembly through the aperture to suppress the target tone.

Abstract: The present disclosure provides a centrifugal blower assembly that includes a centrifugal fan and a scroll casing housing the centrifugal fan. The scroll casing includes a scroll starting position, a scroll ending position and an air passage extending between the scroll starting and ending positions. The scroll ending position is downstream from the scroll starting position relative to airflow through the scroll casing. The centrifugal blower assembly further includes an air outlet extending from the scroll ending position and a plurality of resonators mounted on an exterior surface of the air outlet. Each of the plurality of tuned resonators has respective cavities in fluid communication with inside of the air outlet. Each of the cavities has respective different volumes, heights, widths, and/or lengths from each other.

Abstract: A brushless motor for a heating, ventilation, and air conditioning (HVAC) system. The brushless motor includes a rotor and a stator. The rotor has an odd number (X) of magnets. The stator defines an odd number (Y) of slots, each including a plurality of fractional-pitch phase windings. The brushless motor has a fundamental order that is (X·Y)/2, which is a non-integer number.

Abstract: A blower assembly including a housing, a blower within the housing, and a cut-off that is within the housing downstream of the blower with respect to direction of airflow generated by the blower. Openings are defined by the cut-off. The openings are configured to permit airflow generated by the blower to pass through the openings and to a discharge outlet of the blower assembly. The openings are further configured to reduce blower frequency tone generated as airflow passes across the cut-off.

Abstract: A blower assembly including a housing, a blower within the housing, and a cut-off that is within the housing downstream of the blower with respect to direction of airflow generated by the blower. Openings are defined by the cut-off. The openings are configured to permit airflow generated by the blower to pass through the openings and to a discharge outlet of the blower assembly. The openings are further configured to reduce blower frequency tone generated as airflow passes across the cut-off.

Abstract: A heating, ventilation, and air conditioning (HVAC) system including front and rear blowers. The front blower blows air through a front evaporator to a front area of a passenger cabin. The rear blower blows air through the front evaporator in an integrated HVAC system or through a rear evaporator, and to a rear area of the passenger cabin. The rear blower is always active when the front blower and air conditioning is active.

Abstract: The present disclosure provides a centrifugal blower assembly that includes a centrifugal fan and a scroll casing housing the centrifugal fan. The scroll casing includes a scroll starting position, a scroll ending position and an air passage extending between the scroll starting and ending positions. The scroll ending position is downstream from the scroll starting position relative to airflow through the scroll casing. The centrifugal blower assembly further includes an air outlet extending from the scroll ending position and a plurality of resonators mounted on an exterior surface of the air outlet. Each of the plurality of tuned resonators has respective cavities in fluid communication with inside of the air outlet. Each of the cavities has respective different volumes, heights, widths, and/or lengths from each other.

Abstract: The present disclosure provides for a serviceable fan shroud motor support structure which provides a means to repair or replace individual components of the vehicle cooling module such as the fan motor or fan blades, without removing and dismantling the entire vehicle cooling module. The fan shroud motor support structure includes at least one removable spoke, which once removed, would provide access to the portion of the fan assembly requiring service or replacement. Once the repair or replacement is complete, they simply snap the previously removed spokes back into place in order to complete the repair.

Abstract: A noise reduction insert for an evaporator. The noise reduction insert includes a body defining an inner volume of the insert. The body extends along a longitudinal axis of the insert. A perforated portion of the body defines a plurality of openings configured to allow fluid to pass out from within the inner volume through the plurality of openings. A flange at a first end of the body is opposite to a second end of the body. The flange defines an aperture through which the longitudinal axis extends. The aperture is configured to permit fluid to flow therethrough and into the inner volume defined by the body.

Abstract: The present disclosure provides for a serviceable fan shroud motor support structure which allows for repair or replacement of individual components of the vehicle cooling module such as the fan motor or fan blades, without removing and dismantling the entire vehicle cooling module. The fan shroud motor support structure includes at least one removable spoke, which once removed, would provide access to the portion of the fan assembly requiring service or replacement. Once the repair or replacement is complete, they simply snap the previously removed spokes back into place in order to complete the repair.