Air conditioning apparatus

Patent metadata

Field	Value
Publication number	US-9581391-B2
Application number	US-201214365995-A
Country	US
Kind code	B2
Filing date	Nov 30, 2012
Priority date	Dec 22, 2011
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

An air conditioning apparatus includes an aluminum heat exchanger, an aluminum gas pipe, an aluminum liquid pipe and a copper gas pipe. The aluminum heat exchanger performs heat exchange between air and a refrigerant, and is disposed upright. The aluminum gas pipe channels gas refrigerant, and extends from a side part of the aluminum heat exchanger. The aluminum liquid pipe channels liquid refrigerant, and extends from an area below the aluminum gas pipe in the side part of the aluminum heat exchanger. The copper gas pipe channels gas refrigerant. The aluminum gas pipe is connected in a connecting part to the copper gas pipe from above the copper gas pipe. The aluminum pipe is disposed in an area outside of directly under the connecting part of the aluminum gas pipe and the copper gas pipe.

First claim

What is claimed is:

1. An air conditioning apparatus comprising:
an aluminum heat exchanger configured to perform heat exchange between air and a refrigerant, the aluminum heat exchanger being disposed upright;
an aluminum gas pipe configured and arranged to channel gas refrigerant, the aluminum gas pipe extending from a side part of the aluminum heat exchanger;
an aluminum liquid pipe configured and arranged to channel liquid refrigerant, the aluminum liquid pipe extending from an area below the aluminum gas pipe in the side part of the aluminum heat exchanger;
a copper gas pipe configured and arranged to channel gas refrigerant; and
a copper liquid pipe configured and arranged to channel liquid refrigerant,
the aluminum gas pipe being connected in a connecting part to the copper gas pipe from above the copper gas pipe,
the aluminum liquid pipe being disposed in an area outside of directly connecting part of the aluminum gas pipe and the copper gas pipe,
the aluminum liquid pipe having a first turn-back part extending upward from the side part of the aluminum heat exchanger and then forming a U-turn to extend downward, and
the copper liquid pipe being connected to an end of the first turn-back part from below.

2. The air conditioning apparatus according to claim 1 , wherein
the aluminum gas pipe extends along a direction in which the aluminum liquid pipe extends, and
the aluminum gas pipe has a second turn-back part extending upward from the side part of the aluminum heat exchanger and then forming a U-turn to extend downward,
the copper gas pipe is connected to an end of the second turn-back part from below, and
the second turn-back part is disposed in an orientation that intersects the first turn-back part as seen in a plan view.

3. The air conditioning apparatus according to claim 1 , wherein
the aluminum heat exchanger has a plurality of aluminum flat pipes, an aluminum header pipe to which the flat pipes are connected, and a plurality of aluminum fins bonded to the flat pipes, with the aluminum heat exchanger being configured so that fluid flowing inside the flat pipes exchanges heat with air flowing over the exterior of the flat pipes,
the aluminum gas pipe is connected to a middle vicinity of a top part of the header pipe, and
the aluminum liquid pipe is connected to a bottom part of the header pipe.

4. The air conditioning apparatus according to claim 2 , wherein
the aluminum heat exchanger has a plurality of aluminum flat pipes, an aluminum header pipe to which the flat pipes are connected, and a plurality of aluminum fins bonded to the flat pipes, with the aluminum heat exchanger being configured so that fluid flowing inside the flat pipes exchanges heat with air flowing over the exterior of the flat pipes,
the aluminum gas pipe is connected to a middle vicinity of a top part of the header pipe, and
the aluminum liquid pipe is connected to a bottom part of the header pipe.

Assignees

• Daikin Ind Ltd

Inventors

• Ohtani Yasutaka
• Oritani Yoshio
• Kazusa Takuya
• Jindou Masanori
• Hamadate Junichi

Classifications

• F24F1/30

  for use inside the separate outdoor units · CPC title

• F28F19/00

  Preventing the formation of deposits or corrosion, e.g. by using filters {or scrapers} · CPC title

• F28D7/00 Primary

  Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall · CPC title

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F28F2215/12

  with U-shaped slots for laterally inserting conduits · CPC title