Indoor unit of an air-conditioning apparatus with grooved flow stabilizer

Patent metadata

Field	Value
Publication number	US-9879868-B2
Application number	US-201314649677-A
Country	US
Kind code	B2
Filing date	Aug 28, 2013
Priority date	Dec 13, 2012
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A stabilizer has a tip portion at a boundary between the stabilizer and a nozzle, and a projection on the lower side of the tip portion, and a first recess is formed between the projection and the tip portion in a continuously recessed shape in the longitudinal direction of the cross flow fan.

First claim

The invention claimed is:

1. An indoor unit of an air-conditioning apparatus comprising:
a fan;
a heat exchanger that is disposed to surround an upper side and a front side of the fan;
a nozzle that is disposed on a lower side of a portion of the heat exchanger that is located on the front side of the fan to face the fan; and
a stabilizer that is disposed on a surface of the nozzle that faces the fan along part of an outer periphery of the fan, wherein the stabilizer has a tip portion at a boundary between the stabilizer and the nozzle and a projection on a lower side of the tip portion, wherein
the tip portion projects to a side of the fan and has a portion that curves upward, and
a first recess is formed between the projection and the tip portion in a continuously recessed shape in the longitudinal direction of the fan, and
the stabilizer has a rounded section which is in a convex shape curved toward the fan at a boundary between the stabilizer and an outlet air channel which is disposed on a lower side of the fan, a plurality of vertical grooves are arranged in a longitudinal direction of the fan on the rounded section, vertical groove ribs are formed on the plurality of vertical grooves with positions of the vertical groove ribs being regularly displaced in an oblique direction along the outer periphery of the fan, and a third recess is formed by the vertical groove ribs which are located on part of the vertical grooves, wherein
part of the nozzle forms a drainage groove, and a heat insulating material and a water absorbing material are applied on the drainage groove, and
the insulating material and the water-absorbing material are applied to a lower surface of the nozzle beneath the drainage groove.

2. The indoor unit of the air-conditioning apparatus of claim 1 , wherein the stabilizer has a second recess disposed on a lower side of the first recess in a continuously recessed shape in the longitudinal direction of the fan.

3. The indoor unit of the air-conditioning apparatus of claim 1 , wherein the nozzle forms a drain pan that receives dew condensation water generated in the heat exchanger, and a gap between the drain pan and the portion of the heat exchanger that is located in front of the fan, is 2 mm or less.

4. The indoor unit of the air-conditioning apparatus of claim 1 , wherein a nozzle cover is mounted on an underside of the nozzle via an air layer.

5. The indoor unit of the air-conditioning apparatus of claim 1 , wherein a heat transfer tube of the heat exchanger is made of aluminum.

6. The indoor unit of the air-conditioning apparatus of claim 2 , wherein the second recess has a bottom surface that is concave in cross-section such that the second recess can retain water when the air conditioning apparatus is in an installed position.

Assignees

• Mitsubishi Electric Corp

Inventors

• Hirakawa Seiji
• Niimura Takuya

Classifications

• F24F1/0011

  characterised by air outlets · CPC title

• F24F3/06 Primary

  characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units · CPC title

• F24F1/0025

  Cross-flow or tangential fans · CPC title

• F24F2001/0048

  Mechanical Engineering · mapped topic

• F24F13/22 Primary

  Means for preventing condensation or evacuating condensate · CPC title