Title:
AIR CONDITIONER AND ANTI-FREEZING PROTECTION CONTROL METHOD AND APPARATUS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/238318
Kind Code:
A1
Abstract:
Disclosed are an air conditioner and an anti-freezing protection control method and apparatus therefor. The method comprises: during the cooling operation of an air conditioner, obtaining a first pressure of a refrigerant at a first position in the refrigerant pipe of an evaporator, a second pressure of the refrigerant at a second position, and a third pressure of the refrigerant at the outlet of the evaporator, and separately comparing these pressures with an anti-freezing pressure; if the condition that the smaller value of the first pressure and the second pressure is less than a first anti-freezing pressure is met, performing anti-freezing protection, and controlling a refrigerant bypass between the first position and the second positions to be opened, so that the refrigerant flows from a high-pressure side to a low-pressure side through the refrigerant bypass; and if the condition that the third pressure is less than a second anti-freezing pressure is met, performing anti-freezing protection, and controlling an auxiliary electric heating device in an indoor unit to be turned on. The application of the present invention can improve the reliability of anti-freezing protection control, shorten the anti-freezing protection processing time, and improve cooling comfort.
Inventors:
LEI YANYAO (CN)
YANG KUN (CN)
SI YUEYUAN (CN)
SUN CHAO (CN)
YANG KUN (CN)
SI YUEYUAN (CN)
SUN CHAO (CN)
Application Number:
PCT/CN2020/078492
Publication Date:
December 03, 2020
Filing Date:
March 10, 2020
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F24F11/43; F24F11/41; F25B49/02
Foreign References:
| CN110260467A | 2019-09-20 | |||
| CN204141789U | 2015-02-04 | |||
| CN104748306A | 2015-07-01 | |||
| CN104729033A | 2015-06-24 | |||
| CN1800736A | 2006-07-12 | |||
| US20180180317A1 | 2018-06-28 |
Attorney, Agent or Firm:
QINGDAO LZ PATENT AND TRADEMARK OFFICE CO., LTD. (CN)
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