Back to results
US 7,461,518 B2Granted
Fan and air conditioner
AssigneeDaikin Industries, Ltd.
InventorMasahito Higashida
Life of this patent
Estimating the term…
Abstract
An air conditioner includes a centrifugal fan and a unit casing that houses the centrifugal fan. The centrifugal fan includes an impeller and a scroll casing that houses the impeller. The unit casing has a unit intake port that opens in a direction crossing an opening direction of a scroll intake port. At a circumferential portion of the scroll intake port of the scroll casing, there is formed a bulged portion with an inner surface that is formed evenly in a circumferential direction and an outer surface portion formed away from the unit intake port that bulges out to a side opposite the impeller.
Claims10
A fan comprising:
- a centrifugal fan including an impeller and a scroll casing that houses the impeller, the scroll casing having a scroll intake port;
- and
- a unit casing having an unit intake port that opens in a direction crossing an opening direction of the scroll intake port, the unit casing being configured to house the centrifugal fan,
- the scroll casing having a bulged portion at a circumferential portion of the scroll intake port, the bulged portion having an inner surface that is formed evenly in a circumferential direction and an outer surface portion formed away from the unit intake port that bulges out to a side opposite the impeller,
- the bulged portion being formed unevenly such that a bulging distance increases from a portion near the unit intake port to a portion away from the unit intake port toward the side opposite the impeller.
2 more elements
A fan comprising:
- a centrifugal fan including an impeller and a scroll casing that houses the impeller, the scroll casing having a scroll intake port;
- and
- a unit casing having an unit intake port that opens in a direction crossing an opening direction of the scroll intake port, the unit casing being configured to house the centrifugal fan,
- the scroll casing having a bulged portion at a circumferential portion of the scroll intake port, the bulged portion having an inner surface that is formed evenly in a circumferential direction and an outer surface portion formed away from the unit intake port that bulges out to a side opposite the impeller,
- the bulged portion being formed by a plurality of ribs formed at the circumferential portion of the scroll intake port that protrude to the side opposite the impeller with the ribs having free ends defining an imaginary outer surface of the bulged portion on the side opposite the impeller.
2 more elements
An air conditioner comprising:
- a centrifugal fan including an impeller and a scroll casing that houses the impeller, the scroll casing having a scroll intake port and a scroll discharge port;
- a unit casing having an unit intake port that opens in a direction crossing an opening direction of the scroll intake port and a unit discharge port, the unit casing being configured to house the centrifugal fan;
- a partition member dividing a space inside the unit casing into a fan chamber in communication with the unit intake port and a heat exchanger chamber in communication with the unit discharge port, the partition member including a communication hole formed to allow the fan chamber and the heat exchanger chamber to communicate with each other and to correspond to the scroll discharge port;
- and
- a heat exchanger disposed inside the heat exchanger chamber such that air blown into the heat exchanger chamber from the scroll discharge port passes therethrough and then is blown out from the unit discharge port,
- the scroll casing having a bulged portion at a circumferential portion of the scroll intake port, the bulged portion having an inner surface that is formed evenly in a circumferential direction and an outer surface portion formed away from the unit intake port that bulges out to a side opposite the impeller side.
3 more elements
Dependencies are inferred from the claim text.