Indoor unit of air conditioner and air conditioner including a heat exchanger on a downstream side of a blower

Patent metadata

Field	Value
Publication number	US-9982898-B2
Application number	US-200913144220-A
Country	US
Kind code	B2
Filing date	Oct 2, 2009
Priority date	Feb 5, 2009
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

An indoor unit includes a casing having a suction port formed in an upper part and a blow-out port formed on a lower side at a front face part, an axial-flow or diagonal-flow fan provided on the downstream side of the suction port in the casing, and a heat exchanger provided on the downstream side of the fan and on the upstream side of the blow-out port in the casing, in which air blown out of the fan and refrigerant are heat-exchanged.

First claim

The invention claimed is:

1. An indoor unit of an air conditioner comprising:
a casing having an upper part and a lower side opposite the upper part, the casing further having a suction port formed in the upper part and a blow-out port formed at the lower side of a front face part, wherein air flows in an air flow direction from upstream to downstream through said casing, from said suction port to said blow-out port, the casing yet further having a front face part and a back face part opposite the front face part, the front face part and the back face part extending between said upper part and said lower side;
an axial-flow or diagonal-flow blower provided on a downstream side of said suction port in said casing in the air flow direction; and
a heat exchanger provided on a downstream side of said axial-flow or diagonal-flow blower and on an upstream side of said blow-out port in said casing in the air flow direction, said heat exchanger being configured to exchange heat between air blown out of said axial-flow or diagonal-flow blower and refrigerant,
wherein said heat exchanger includes
a front-face side heat exchanger arranged at a front face side of said casing relative to a line of symmetry of said casing extending from the upper part to the lower side, wherein the front-face side heat exchanger comprises two exchanger units, each of said heat exchanger units of the front-face side heat exchanger taking the form of an elongated quadrilateral in longitudinal section, wherein lines extending along the direction of elongation of each of the respective quadrilaterals, and at the centers of the respective quadrilaterals, together form a V-shape, and
a back-face side heat exchanger arranged at a back-face side of said casing relative to the line of symmetry of said casing, wherein the back-face side heat exchanger comprises two heat exchanger units forming a V-shape, each of said heat exchanger units of the back-face side heat exchanger taking the form of an elongated quadrilateral in longitudinal section, wherein lines extending along the direction of elongation of each of the respective quadrilaterals, and at the centers of the respective quadrilaterals of the front-face side heat exchanger and the back-face side heat exchanger together form a W-shape,

wherein an upper end portion of a back-most heat exchanger unit of the V-shape back-face side heat exchanger is positioned higher than an upper end portion of a front-most heat exchanger unit of the V-shape back-face side heat exchanger,
wherein said heat exchanger is configured so that a flow volume of air flowing through said front-face side heat exchanger is smaller than a flow volume of air flowing through said back-face side heat exchanger, and
said axial-flow or diagonal-flow blower is provided only at the upstream side of said heat exchanger in the air flow direction,
wherein no blower is present downstream of the heat exchanger in the air flow direction, and adjacent the blow-out port.

2. The indoor unit of the air conditioner of claim 1 , wherein on a side view, a length in a longitudinal direction of said front-face side heat exchanger is shorter than a length in a longitudinal direction of said back-face side heat exchanger.

3. The indoor unit of the air conditioner of claim 1 , wherein pressure loss of said front-face side heat exchanger is larger than pressure loss of said back-face side heat exchanger.

4. The indoor unit of the air conditioner of claim 1 , wherein
said front-face side heat exchanger is arranged so that air flows from the front face side to the back face side; and
said back-face side heat exchanger is arranged so that air flows from the back face side to the front face side.

5. The indoor unit of the air conditioner of claim 1 , wherein said axial-flow or diagonal-flow blower is arranged so that air volumes in accordance with a heat transfer area of said front-face side heat exchanger and a heat transfer area of said back-face side heat exchanger are supplied to said front-face side heat exchanger and said back-face side heat exchanger.

6. The indoor unit of the air conditioner of claim 5 , wherein a rotating shaft of said axial-flow or diagonal-flow blower is arranged above the heat exchanger having a larger heat transfer area between said front-face side heat exchanger and said back-face side heat exchanger.

7. The indoor unit of the air conditioner of claim 5 , wherein a rotating shaft of said axial-flow or diagonal-flow blower is arranged so as to be directed to a heat exchanger having a larger heat transfer area among said front-face side heat exchanger and said back-face side heat exchanger.

8. The indoor unit of the air conditioner of claim 1 , further comprising:
a first sound detecting device installed at a position between said blower and said heat exchanger and detecting a sound at the position;
a current sound output device installed between said blower and said heat exchanger and outputting a control sound;
a second sound detecting device installed at a position on the downstream side of said blower and detecting sound at the position; and
a control sound generating device for generating said control sound on the basis of the detected results of said first sound detecting device and said second sound detecting device.

9. The indoor unit of the air conditioner of claim 8 , wherein said second sound detecting device is arranged between said blower and said heat exchanger.

10. The indoor unit of the air conditioner of claim 8 , wherein said second sound detecting device is arranged on the downstream side of said heat exchanger.

11. The indoor unit of the air conditioner of claim 1 , further comprising:
a control sound output device installed between said blower and said heat exchanger and outputting a control sound;
a sound detecting device installed at a position on the downstream side of said blower and detecting sound at the position; and
a control sound generating device for generating said control sound on the basis of the detected result of said sound detecting device.

12. The indoor unit of the air conditioner of claim 11 , wherein said sound detecting device is installed between said blower and said heat exchanger.

13. The indoor unit of the air conditioner of claim 11 , wherein said sound detecting device is installed on the downstream side of said heat exchanger.

14. An air conditioner comprising the indoor unit of claim 1 .

15. The indoor unit of the air conditioner of claim 1 , wherein
the indoor unit is a wall-mounted indoor unit, and
air is blown out through said blow-out port to a front side of said casing.

16. The indoor unit of the air conditioner of claim 1 , wherein the blower rotates about a rotation axis on a front/back line of symmetry of the casing.

17. The indoor unit of the air conditioner of claim 16 , wherein the V-shapes forming the W-shape are joined at a point on the front/back line of symmetry of the casing.

Assignees

• Yamada Shoji
• Sakoda Kenichi
• Akiyoshi Masao
• Takamori Akira
• Uehara Nobuaki
• Fukui Tomoya
• Nakashima Seiji
• Iwamoto Naoki
• Michihata Satoshi
• Otsuka Isao
• Tsuji Masayuki
• Mitsubishi Electric Corp

Inventors

• Yamada Shoji
• Sakoda Kenichi
• Akiyoshi Masao
• Takamori Akira
• Uehara Nobuaki
• Fukui Tomoya
• Nakashima Seiji
• Iwamoto Naoki
• Michihata Satoshi
• Otsuka Isao
• Tsuji Masayuki

Classifications

• F24F13/24

  Means for preventing or suppressing noise · CPC title

• F24F2013/247

  Active noise-suppression · CPC title

• F24F1/0029

  Axial fans · CPC title

• F24F13/30

  Arrangement or mounting of heat-exchangers · CPC title

• F28D2020/0013

  the heat storage material being enclosed in elements attached to or integral with heat exchange conduits · CPC title