to download LG Multi V Plus - Hawco
to download LG Multi V Plus - Hawco
to download LG Multi V Plus - Hawco
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1.3 Master and slave Unit's EEV control<br />
(1) Main EEV control<br />
Main EEV operates with fuzzy control rules <strong>to</strong> keep the degree of super Heat(Superheat) (about 3°C)at<br />
the evapora<strong>to</strong>r outlet stable during heating mode<br />
The degree of Superheat = Tsuction - Tevaporation<br />
Tsuction : temperature at suction pipe sensor(°C)<br />
Tevaporation : evaporation temperature equivalent <strong>to</strong> low pressure(°C)<br />
(2) Subcooling EEV control(about 15°C)<br />
Subcooling EEV works with fuzzy rules <strong>to</strong> keep the degree of Subcool at the outlet of subcooler during<br />
cooling mode<br />
The degree of Subcool = Tcondensation - Tliquid<br />
Tliquid : temperature at outlet of subcooler(°C)<br />
Tcondensation : condensation temperature equivalent <strong>to</strong> high pressure(°C)<br />
Copyright ©2007 <strong>LG</strong> Electronics. Inc. All right reserved.<br />
Only for training and service purposes<br />
- 23 -<br />
Function<br />
(3) Avoiding excessive high discharge temperature : when main EEV opens some given opening (R22 :<br />
1000pls, R410A : 800 pls) and discharge temperature is above 85°C in heating operation, subcooling<br />
EEV may control the "subcooling out temperature-evaporating temperature" <strong>to</strong> be some given difference.<br />
<strong>LG</strong>E Internal Use Only
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