Air conditioning apparatus

Patent metadata

Field	Value
Publication number	US-10006463-B2
Application number	US-201514687216-A
Country	US
Kind code	B2
Filing date	Apr 15, 2015
Priority date	Apr 18, 2014
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

An air conditioning apparatus includes a centrifugal fan mounted in an interior of a casing and a pressure sensor. The pressure sensor can have a primary-side pressure detection tube opened in a position adjacent to a circumferential part of the casing on an inlet side surface of the bell mouth of the fan when the bell mouth is seen from a direction along the rotary shaft to detect a primary-side pressure of the centrifugal fan. Alternatively, the pressure sensor can have a primary-side pressure detection tube opened in a position adjacent to a circumferential part of the casing on a heat exchanger compartment side surface of the partition member when the partition member is seen from a direction along the rotary shaft to detect a primary-side pressure of the centrifugal fan.

First claim

The invention claimed is:

1. An air conditioning apparatus, comprising:
a centrifugal fan mounted in an interior of a casing, the centrifugal fan including a bladed wheel having a hub, a shroud and a plurality of rearward blades, the hub being coupled to a rotary shaft of a fan motor, the shroud being opposed to the hub and having a fan opening bored in a center part thereof, the rearward blades being disposed between an outer peripheral part of the hub and an outer peripheral part of the shroud,
a bell mouth inserted at an outlet end thereof into the fan entrance; and
a pressure sensor having a primary-side pressure detection tube opened in a position adjacent to a circumferential part of the casing on an inlet side of the bell mouth when the bell mouth is seen from a direction along the rotary shaft to detect a primary-side pressure of the centrifugal fan,
the position where the primary-side detection tube is opened being closer to the circumferential part of the casing than to the fan opening when seen from the direction along the rotary shaft, and
the position where the primary-side detection tube is opened being aligned with the bell mouth when seen along a direction perpendicular to the direction along the rotary shaft.

2. The air conditioning apparatus according to claim 1 , wherein
the primary-side pressure detection tube is opened in a position adjacent to a corner of the circumferential part of the casing when seen from the direction along the rotary shaft.

3. An air conditioning apparatus, comprising:
a casing having an intake port and a blow-out port;
a partition member dividing an interior of the casing into a heat exchanger compartment located on an intake port side and a fan compartment located on a blow-out port side, the partition member having a fan entrance, the fan entrance making the heat exchanger compartment and the fan compartment communicate with each other;
a heat exchanger mounted in the heat exchanger compartment;
a centrifugal fan including a bladed wheel having a plurality of rearward blades, the centrifugal fan being configured to suck air existing in the heat exchanger compartment into the fan compartment through the fan entrance, with the bladed wheel being mounted in the fan compartment such that a rotary shaft of the bladed wheel is oriented along an opening direction of the fan entrance; and
a primary pressure sensor having a primary-side pressure detection tube opened in a position adjacent to a circumferential part of the casing on a heat exchanger compartment side of the partition member when the partition member is seen from a direction along the rotary shaft to detect a primary-side pressure of the centrifugal fan,
the position where the primary-side detection tube is opened being closer to the circumferential part of the casing than to the fan entrance of the partition member when seen from the direction alone the rotary shaft, and
the position where the primary-side detection tube is opened being closer to the partition member than to the heat exchanger as measured along the direction along the rotary shaft.

4. The air conditioning apparatus according to claim 3 , wherein
the primary pressure sensor is disposed on a fan compartment side of the partition member, and
the primary-side pressure detection tube extends from the primary pressure sensor to the partition member along lateral parts forming the circumferential part of the casing when seen from the direction along the rotary shaft.

5. The air conditioning apparatus according to claim 4 , wherein
the rotary shaft of the bladed wheel is disposed in a position adjacent to a bladed wheel nearby lateral part, the bladed wheel nearby lateral part being one of the lateral parts of the casing that are disposed along the opening direction of the fan entrance, and
the primary-side pressure detection tube is opened in a position adjacent to another one of the lateral parts of the casing, the another lateral part being opposed to the bladed wheel nearby lateral part.

6. The air conditioning apparatus according to claim 4 , further comprising
a secondary pressure sensor having a secondary-side pressure detection tube opened in the fan compartment to detect a secondary-side pressure of the centrifugal fan,
the air conditioning apparatus being configured to perform rotation speed control of the centrifugal fan based on a pressure differential between the secondary-side pressure and the primary-side pressure.

7. The air conditioning apparatus according to claim 3 , wherein
the rotary shaft of the bladed wheel is disposed in a position adjacent to a bladed wheel nearby lateral part, the bladed wheel nearby lateral part being one of multiple lateral parts of the casing that are disposed along the opening direction of the fan entrance, and
the primary-side pressure detection tube is opened in a position adjacent to another one of the multiple lateral parts of the casing, the another lateral part being opposed to the bladed wheel nearby lateral part.

8. The air conditioning apparatus according to claim 7 , further comprising
a secondary pressure sensor having a secondary-side pressure detection tube opened in the fan compartment to detect a secondary-side pressure of the centrifugal fan,
the air conditioning apparatus being configured to perform rotation speed control of the centrifugal fan based on a pressure differential between the secondary-side pressure and the primary-side pressure.

9. The air conditioning apparatus according to claim 3 , further comprising
a secondary pressure sensor having a secondary-side pressure detection tube opened in the fan compartment to detect a secondary-side pressure of the centrifugal fan,
the air conditioning apparatus being configured to perform rotation speed control of the centrifugal fan based on a pressure differential between the secondary-side pressure and the primary-side pressure.

10. The air conditioning, apparatus according to claim 3 , wherein
the primary-side pressure detection tube is opened in a position adjacent to a corner of the circumferential part of the casing when seen from the direction along the rotary shaft.

Assignees

• Daikin Ind Ltd

Inventors

• Kashihara Takashi
• Yamasaki Takahiro
• Yokoyama Naofumi
• Yokomizo Tsuyoshi

Classifications

• F24F1/50

  with outlet air in upward direction · CPC title

• F24F11/89

  Arrangement or mounting of control or safety devices · CPC title

• F04D27/001

  Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring · CPC title

• F04D17/08 Primary

  Centrifugal pumps · CPC title