Sanyo XHS3632 Electronic Expansion Valve, Compressor Discharge Gas Temperature, Fuzzy Control

2. Processes and functions

Section

1

2

3

4

2-13 Electronic Expansion Valve

❑This valve allows very precise and smooth control of the amount of refrigerant flow in the system. Since the valve is operated by a step motor, the control circuits can open or close it in very exact amounts, so the degree of heating or cooling can be changed by just a little, or changed very quickly or slowly.

(Completely close …… 0 step) (Full open ................ 480 step)

Model		Min. open		Max. open
	Heating		Cooling
24 type	100 step		120 step	480 step
36 type	90 step		90 step	480 step

❑Fuzzy Control

Fuzzy Control is a controlling system to control electronic refrigerant control valve using fuzzy logic. It regulates the functions of heating and cooling, as well as some of the processes inside the unit, by taking account of many different conditions of temperature, fan speed, etc. These control circuits work automatically to send just the right amount of refrigerant through the Electronic Refrigerant Control Valve.

2-14 Compressor Discharge Gas Temperature

(A) Cooling

Indoor temp. (°F)		68 – 77		79 – 82	84	– 90
Outdoor temp. (°F)	55 or below		57 – 61	81 – 95	97	– 109
Compressor discharge	104 – 176		104 – 194	140 – 212	158 – 221
gas temp. (°F)

(B) Heating (Except During Defrosting)

Indoor temp. (°F)

64 – 70

72

– 77

79

– 86

Outdoor temp. (°F)

32 or below

34

– 50

32 or below

34

– 50

52

– 70

32 or below

34

– 50

52

– 70

Compressor discharge

104 – 176

122

– 194

122 – 194

122

– 212

140

– 221

122 – 194

140

– 212

158

– 221

gas temp. (°F)

❑Operate the unit at least 30 minutes to stabilize the discharge temperature.

❑The above discharge temperature was measured with a 15m tubing length. The temperature may vary with tubing length.

SM830076

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