MULTI-SPLIT AIR CONDITIONING SYSTEM AND SWITCHING CONTROL METHOD FOR OPERATING MODE OF INDOOR UNITS THEREOF

WIPO Patent Application WO/2018/049722

A1

A multi-split air conditioning system and a switching control method for an operating mode of indoor units thereof. The method comprises the following steps: when any indoor unit (21, 22, 23, 24) in multiple indoor units (21, 22, 23, 24) receives a mode switching instruction, the indoor unit (21, 22, 23, 24) sends the mode switching instruction to a shunt device (30) (S1); the shunt device (30) performs switching control on a heating control valve or a refrigeration control valve corresponding to the indoor unit (21, 22, 23, 24) according to the received mode switching instruction, releases pressure by controlling a second throttling assembly (34), a first control valve, and a bypass valve in order to reduce a differential pressure across the refrigeration control valve or the heating control valve corresponding to the indoor unit (21, 22, 23, 24), obtains a switching flag bit of a four-way valve, and controls the refrigeration control valve or the heating control valve corresponding to the indoor unit (21, 22, 23, 24) and the four-way valve according to the switching flag bit of the four-way valve (S2).

ZHOU JUN (CN)
YANG SHIHONG (CN)
ZHUANG ZIBAO (CN)

PCT/CN2016/104675

March 22, 2018

November 04, 2016

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GD MIDEA HEATING & VENTILATING EQUIPMENT CO LTD (CN)
MIDEA GROUP CO LTD (CN)

F24F11/00; F25B41/20

CN105627507A	2016-06-01
CN1495390A	2004-05-12
CN201007582Y	2008-01-16
CN105115063A	2015-12-02
JP2001174090A	2001-06-29
KR20060091526A	2006-08-21

See also references of EP 3517848A4

TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)

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