Refrigeration cycle apparatus

Patent metadata

Field	Value
Publication number	US-2016109162-A1
Application number	US-201414894760-A
Country	US
Kind code	A1
Filing date	Jul 30, 2014
Priority date	Sep 13, 2013
Publication date	Apr 21, 2016
Grant date	—

Abstract

The inside of a casing constituting an indoor unit of an air-conditioning apparatus is laterally divided by an air passage partition so that an air passage chamber housing an indoor fan and an indoor heat exchanger is defined close to a casing side panel. A space in the casing close to the casing side panel is further vertically divided by a partition having through holes so that a pipe connection chamber housing parts of the extension pipes, flare joints, and indoor pipes is defined in an upper portion and a pipe draw-out chamber in which the extension pipes are arranged is defined in a lower portion. Gaps between outer peripheries of the extension pipes and inner peripheries of the through holes are filled with insulations.

First claim

1 . A refrigeration cycle apparatus using a flammable refrigerant, the refrigeration cycle apparatus comprising:
an outdoor unit including at least a compressor and an outdoor pipe; an indoor unit including at least an indoor heat exchanger and an indoor pipe; an extension pipe connecting the outdoor pipe and the indoor pipe to each other; a pipe connection chamber disposed in a casing constituting the indoor unit and housing a connection portion connecting the indoor pipe and the extension pipe; and a pipe draw-out chamber disposed in the casing constituting the indoor unit, the extension pipe drawn out from the pipe connection chamber passing through the pipe draw-out chamber, the pipe connection chamber and the pipe draw-out chamber being partitioned from each other by a partition having a through hole, the extension pipe penetrating the through hole, a part of the pipe draw-out chamber being constituted by a part of the casing constituting the indoor unit, the extension pipe penetrating a through hole formed in the part of the casing.

2 . The refrigeration cycle apparatus of claim 1 , wherein
the pipe draw-out chamber is divided into a plurality of chambers by one or more additional partitions each having a through hole, the extension pipe penetrating the through hole, and the extension pipe serially and sequentially passes through the chambers of the pipe draw-out chamber.

3 . The refrigeration cycle apparatus of claim 1 , wherein
the through hole in the pipe draw-out chamber is located in an upper portion or a top panel of the casing, the extension pipe penetrating the through hole in the pipe draw-out chamber.

4 . The refrigeration cycle apparatus of claim 1 , wherein
the indoor heat exchanger includes a plurality of heat radiation plates spaced from one another, and a heat transmission pipe penetrating the plurality of heat radiation plates in a serpentine manner, and the pipe connection chamber houses a joint portion jointing the heat transmission pipe and the indoor pipe.

5 . The refrigeration cycle apparatus of claim 1 , wherein
the indoor heat exchanger includes a refrigerant channel and a water channel adjacent to each other, and a refrigerant connection portion communicating with the refrigerant channel, and the pipe connection chamber houses the refrigerant connection portion.

6 . The refrigeration cycle apparatus of claim 1 , wherein
the indoor pipe and the extension pipe are connected to each other by a mechanical joint.

7 . The refrigeration cycle apparatus of claim 1 , wherein
a gap between an outer periphery of the extension pipe and an inner periphery of the through hole is filled with a gap filler of a closed cell foam material.

8 . The refrigeration cycle apparatus of claim 1 , wherein
the refrigerant is one of a single component HFC refrigerant of R32 (CH 2 F 2 : difluoromethane), HFO-1234yf (CF 3 CF=CH 2 : tetrafluoropropene), or HFO-1234ze (CF 3 —CH=CHF), or a mixed refrigerant of these single component refrigerants.

Assignees

• Mitsubishi Electric Corp

Inventors

• Suzuki Yasuhiro
• Komai Takao
• Maeda Akira
• Takishita Takaaki

Classifications

• F25B2313/006

  two pipes connecting the outdoor side to the indoor side with multiple indoor units · CPC title

• F24F11/36

  to leakage of heat-exchange fluid · CPC title

• F25B2313/003

  Indoor unit with water as a heat sink or heat source · CPC title

• F25B47/025

  by reversing the cycle · CPC title

• Y02B30/12

  Hot water central heating systems using heat pumps · CPC title