MULTI-SPLIT AIR CONDITIONING SYSTEM AND MEDIUM PRESSURE CONTROL METHOD THEREOF - GD MIDEA HEATING & VENTILATING EQUIPMENT CO LTD

Title:

MULTI-SPLIT AIR CONDITIONING SYSTEM AND MEDIUM PRESSURE CONTROL METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/2016/173497

Kind Code:

A1

Abstract:

Provided are a multi-split air conditioning system and medium pressure control method thereof. The multi-split air conditioning system comprises an outdoor unit device (10), an airflow dividing apparatus (30), and multiple indoor unit devices (21, 22, 23, 24). The dividing apparatus (30) comprises a gas/liquid separator (104) and a first electronic expansion valve (304A). The dividing apparatus (10) uses a preset medium pressure initial control target value to control the first electronic expansion valve (304A), and obtains a subcooling value of an indoor heating unit device in the multiple indoor unit devices (21, 22, 23, 24), an outlet air temperature of the indoor heating unit device, and an opening value of an airflow reducing element in the indoor heating unit device, and performs a default calibration on the medium pressure control target value of the first electronic expansion valve (304A). When the opening value of the reducing element in the indoor heating unit device reaches a maximum opening or a minimum opening and lasts a first preset period of time, the dividing apparatus (10) calibrates a current medium pressure control target value of the first electronic expansion valve (304A) according to a preset step size, thereby, calibrating the medium pressure control target value according to the opening value of the airflow reducing element in an operating indoor heating unit device, thus ensuring a heating effect of the indoor heating unit device.

Inventors:

LUO BIN (CN)
LI YUEMING (CN)

Application Number:

PCT/CN2016/080407

Publication Date:

November 03, 2016

Filing Date:

April 27, 2016

Export Citation:

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Assignee:

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

International Classes:

F25B41/34; F25B13/00; F25B41/40

Domestic Patent References:

WO2014054091A1

2014-04-10

Foreign References:

CN104776630A	2015-07-15
US20100282434A1	2010-11-11
EP2290304A1	2011-03-02
CN104197570A	2014-12-10

Other References: