Title:
HEAT PUMP WATER HEATER AND DEFROSTING CONTROL METHOD AND DEVICE THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/185707
Kind Code:
A1
Abstract:
A heat pump water heater and a defrosting control method and device thereof. The method comprises the following steps: when the heat pump water heater enters a defrosting mode, obtaining a water inlet temperature of the heat pump water heater; determining a temperature range of the water inlet temperature, wherein the water inlet temperature of the heat pump water heater is divided into a plurality of temperature ranges, each temperature range corresponding to a group of defrosting time needed in the deforesting process of the heat pump water heater and a coil temperature for exiting the defrosting process; and according to the temperature range of the water inlet temperature, obtaining the corresponding defrosting time and the coil temperature for exiting the defrosting process, and according to the obtained defrosting time and the coil temperature for exiting the defrosting process, performing the defrost control on the heat pump water heater. The method controls the time required in each defrosting process and the coil temperature for exiting the defrosting process by controlling the water inlet temperature of a unit, achieving complete defrosting and solving the problem of the pressure being too high which easily occurs during the defrosting process, thereby improving the quality of water heating and ensuring the stable operation during the water heating mode.
Inventors:
WANG LIYOU (CN)
Application Number:
PCT/CN2016/104677
Publication Date:
November 02, 2017
Filing Date:
November 04, 2016
Export Citation:
Assignee:
GD MIDEA HEATING & VENTILATING EQUIPMENT CO LTD (CN)
MIDEA GROUP CO LTD (CN)
MIDEA GROUP CO LTD (CN)
International Classes:
F25B47/00
Foreign References:
| JP2015094517A | 2015-05-18 | |||
| CN105865024A | 2016-08-17 | |||
| CN103175353A | 2013-06-26 | |||
| CN103344040A | 2013-10-09 | |||
| CN102788461A | 2012-11-21 | |||
| US6212894B1 | 2001-04-10 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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