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US 8,998,587 B2Granted
Blower motor cooling tube noise suppressor for ticking/chirping
AssigneeDENSO International America, Inc.
InventorsPrakash T. Thawani, Stephen Sinadinos
Life of this patent
Estimating the term…
Abstract
A blower unit for a vehicle including a fan, a motor, a scroll case, a cooling chamber, a first partition, and a second partition. The fan is configured to generate airflow. The motor is connected to the fan. The scroll case accommodates the fan. The cooling chamber is connected to the scroll case and defines a cooling path for guiding airflow from the fan to the motor. The first partition is arranged in the cooling path. The second partition is arranged in the cooling path spaced apart from the first partition.
Claims23
A blower unit for a vehicle comprising:
- a fan configured to generate airflow;
- a motor connected to the fan;
- a scroll case accommodating the fan;
- a cooling path connected to the scroll case, the cooling path guiding a part of the airflow from the fan to the motor;
- a first surface accommodated in the cooling path, the first surface being generally perpendicular to the part of the airflow directed to the motor;
- and
- a second surface accommodated in the cooling path, the second surface being substantially parallel to the first surface;
- wherein
- the first surface and the second surface at least partially overlap each other in a direction of the airflow directed to the motor, the first and second surfaces defining a first gap therebetween;
- and
- a dimension of the first gap is set dependent on a frequency of a noise created by the motor, the dimension of the first gap is determined as follows:
- f=n*c/(4 L) where “f” is the frequency of the noise, n is an integer “c” is velocity of sound, and “L” is the dimension of the first gap.
9 more elements
A blower unit for a vehicle comprising:
- a fan configured to generate airflow;
- a motor connected to the fan;
- a scroll case accommodating the fan;
- a cooling path connected to the scroll case, the cooling path guiding a part of the airflow from the fan to the motor;
- a first surface accommodated in the cooling path, the first surface being generally perpendicular to the part of the airflow directed to the motor;
- and
- a second surface accommodated in the cooling path, the second surface being substantially parallel to the first surface;
- and
- a third surface accommodated in the cooling path, the third surface being substantially parallel to the second surface;
- wherein:
- the first surface and the second surface at least partially overlap each other in a direction of the airflow directed to the motor, the first and second surfaces defining a first gap therebetween;
- the second surface and the third surface overlap with each other, and define a second gap therebetween;
- and
- the first gap and the second gap have different lengths.
11 more elements
A blower unit for a vehicle comprising:
- a fan configured to generate airflow;
- a motor connected to the fan;
- a scroll case accommodating the fan;
- a cooling path connected to the scroll case, the cooling path guiding a part of the airflow from the fan to the motor;
- a first surface accommodated in the cooling path, the first surface being generally perpendicular to the part of the airflow directed to the motor;
- and
- a second surface accommodated in the cooling path, the second surface being substantially parallel to the first surface;
- wherein
- the first surface and the second surface at least partially overlap each other in a direction of the airflow directed to the motor, the first and second surfaces defining a first gap therebetween;
- and
- the first and second surfaces are flat surfaces.
8 more elements
A blower unit for a vehicle comprising:
- a fan configured to generate airflow;
- a motor connected to the fan;
- a scroll case accommodating the fan;
- a cooling chamber connected to the scroll case and defining a cooling path for guiding airflow from the fan to the motor;
- a first partition arranged in the cooling path;
- and
- a second partition arranged in the cooling path spaced apart from the first partition to define a gap;
- wherein
- a dimension of the gap is set dependent on a frequency of a noise created by the motor, the dimension of the first gap is determined as follows:
- f=n*c/(4 L) where “f” is the frequency of the noise, n is an integer “c” is velocity of sound, and “L” is the dimension of the first gap.
7 more elements
A blower unit for a vehicle comprising:
- a fan configured to generate airflow;
- a motor connected to the fan and seated within a motor housing;
- a scroll case accommodating the fan;
- a cooling chamber connected to the scroll case and defining a cooling path for guiding airflow from the fan to the motor;
- a sloped surface of the cooling chamber that extends between an outer peripheral portion of the scroll case to an edge of the motor housing;
- a first partition arranged in the cooling path and extending from the scroll case;
- and
- a second partition arranged in the cooling path spaced apart from the first partition to define a gap, the second partition extending from one of the scroll case or the sloped surface;
- wherein
- a dimension of the gap is set dependent on a frequency of a noise created by the motor, the dimension of the first gap is determined as follows:
- f=n*c/(4 L) where “f” is the frequency of the noise, n is an integer “c” is velocity of sound, and “L” is the dimension of the first gap.
8 more elements
A blower unit for a vehicle comprising:
- a fan configured to generate airflow;
- a motor connected to the fan;
- a scroll case accommodating the fan;
- a cooling path connected to the scroll case, the cooling path guiding a part of the airflow from the fan to the motor;
- a first surface accommodated in the cooling path, the first surface being generally perpendicular to the part of the airflow directed to the motor;
- and
- a second surface accommodated in the cooling path, the second surface being substantially parallel to the first surface;
- wherein:
- the first surface and the second surface at least partially overlap each other in a direction of the airflow directed to the motor, the first and second surfaces defining a first gap therebetween;
- a dimension of the first gap is set dependent on a frequency of a noise created by the motor;
- a third surface is accommodated in the cooling path, the third surface being substantially parallel to the second surface;
- and
- the second surface and the third surface at least partially overlap each other in a direction of the air flow directed to the motor, the second and the third surfaces defining a second gap therebetween.
10 more elements
Dependencies are inferred from the claim text.