OUTDOOR UNIT FOR AIR CONDITIONING DEVICE

WIPO Patent Application WO/2021/255780

A1

Provided is an outdoor unit for an air conditioning device, with which: pressure loss during use with an evaporator can be reduced; and high heating capability and improvements in cooling performance can be realized at low cost even under the influence of a liquid head caused by the wind speed distribution of a heat exchanger and the height of the heat exchanger.　The heat exchanger has a height of at least 1 meter and is constituted by three columns of heat exchange units that are arranged along the direction in which air flows. A first column heat exchange unit, which is on the upwind side among the heat exchange units, is disposed such that a U-shaped heat transfer pipe overlaps in a stage direction. Two columns on the downwind side are disposed such that the U-shaped heat transfer pipe straddles a second column heat exchange unit and a third column heat exchange unit. The third column heat exchange unit of an upper-side heat exchanger is connected to a gas header. The number of cooling paths connected to the gas header is greater than half the total number of stages of the heat exchanger, and is the same number of stages as the number of cooling paths connected to the gas header. The first column heat exchange unit of a lower-side heat exchanger is connected to a liquid coolant distributor. The U-shaped heat transfer pipe of the third column heat exchange unit of the lower-side heat exchanger and the U-shaped heat transfer pipe of the first column heat exchange unit of the upper-side heat exchanger are connected via a path connection pipe.

WO/2017/069485	OUTDOOR UNIT OF AIR CONDITIONER, COOLING UNIT APPLIED TO THE OUTDOOR UNIT, AND METHOD FOR MANUFACTURING THE COOLING UNIT
JP7004847	Heat exchanger and refrigeration cycle equipment
JP5569408	A heat exchanger and an air harmony machine

TOYODA HIROYUKI (JP)
YASUDA GEN (JP)
SUN MICHAEL (JP)

PCT/JP2020/023375

December 23, 2021

June 15, 2020

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HITACHI JOHNSON CONTROLS AIR CONDITIONING INC (JP)

F24F1/14

WO2014199501A1

2014-12-18

JPH09196507A	1997-07-31
JP2015141009A	2015-08-03
JP2014126322A	2014-07-07

See also references of EP 4166858A4

POLAIRE I.P.C. (JP)

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