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Title:
MULTI-SPLIT SYSTEM AND METHOD AND DEVICE FOR ADJUSTING OIL VOLUME OF COMPRESSOR OF MULTI-SPLIT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/091432
Kind Code:
A1
Abstract:
A multi-split system and a method and device for adjusting an oil volume of a compressor of a multi-split system. The adjusting method comprises the following steps: recycling oil back to an oil storage tank (152) by controlling a switch unit (151) to turn on and an oil volume adjusting unit (153) to turn off; when a continuous time over which the oil storage tank recycles oil reaches a first preset time (t1), controlling the switch unit to turn off and controlling a multi-split system to perform a test run; obtaining, according to a low-pressure piping pressure loss (P1) and a refrigerant flow (Q), a low-pressure piping pipe diameter (D) and a low-pressure refrigerant density (Den), an excess oil volume (Q2) that needs to be recycled, and obtaining, according to the excess oil volume and a maximum oil storage volume (Qz) of the oil storage tank, an oil volume to be expelled (Q3); controlling a difference between the high pressure and the low pressure of the multi-split system to be in a preset pressure range to obtain an oil expelling rate (Qx), obtaining an oil expelling time (t2) according to the oil volume that needs to be expelled and the oil expelling rate, and controlling a turn-on time of the oil volume adjusting apparatus (150) to meet the oil expelling time so as to expel the oil volume that needs to be expelled from the multi-split system, ensuring the operational efficiency of the system.

Inventors:
WANG MINGREN (CN)
YANG KUN (CN)
Application Number:
PCT/CN2018/114618
Publication Date:
May 16, 2019
Filing Date:
November 08, 2018
Export Citation:
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Assignee:
GD MIDEA HEATING & VENTILATING EQUIPMENT CO LTD (CN)
MIDEA GROUP CO LTD (CN)
International Classes:
F04B39/02; F24F1/00
Foreign References:
CN107939649A2018-04-20
CN103471298A2013-12-25
CN105352064A2016-02-24
CN1892154A2007-01-10
CN104180563A2014-12-03
CN203657079U2014-06-18
JPH07247961A1995-09-26
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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