Cryogenic Refrigeration System -150℃～-20℃

Overview:

• Microcomputer control, cascade temperature controller, digital temperature display, the regulation of unit 0.1℃, inside the temperature range -20 ℃ ~ -125 ℃ adjustable,operation of cryogenic refrigeration system.
• Multi-safety protection, more reliable operation.
• France TECUMSEH compressor, Germany DANFOSS compressor, EMERSON compressor, automatic cascade refrigeration technology.
• With self-diagnosis function, freezer overload protection, high-pressure switches, overload relays, thermal protection device and other security functions, and fully guarantee the use of safety.
• Three sealed mold layer of insulation, Extra-thick high-density polyurethane foam insulation layer, the effect of good insulation; Inline vacuum insulation panels.
• Human design, more convenient and flexible.
• Suitable for mechanical producing plant use.

Model	GY-A228N	GY-A250N	GY-A2A10N	GY-A350N	GY-A3A10N	GY-A550N	GY-A5A10N
Volume	280L	500L	1000L	500L	1000L	500L	1000L
Inner dimension	800*600*600	1200*650*650	1550*800*750	1200*650*650	1550*800*750	1200*650*650	1550*800*750
Type	（Vertical）
Capability carrying	150KG	220KG	300KG	220KG	300KG	220KG	300KG
	Designed bearing capacity is two times of the standard one, (refrigeration system is designed according to the standard capacity when target artifact weight is greater than the standard capacity, the cooling rate will decrease)
Temp. range	-120℃～20℃	-120℃～20℃	-120℃～20℃	-135℃～0℃	-135℃～0℃	-150℃～0℃	-150℃～0℃
Cooling capacity	0.7kw -110℃	1 kw -110℃	2 kw -110℃	1kw -125℃	2 kw -125℃	1 kw -140℃	2kw -140℃
Temp. accuracy	±2℃	±2℃	±2℃	±2℃	±2℃	±2℃	±2℃
Heating power	2kw	3kw	5kw	3kw	5kw	3kw	5kw
	Nickel-chromium alloy electric heating heater, the controller has double safety protection, with independent temperature limiter protection.
Cooling rate	Ambient temperature of 25℃, no-load,（from 0℃to -110℃ about 1 .5 hour；
	from 0℃ to -140℃ about 2 hours, cooling rate will be a little different for ambient temperature changes.
Controller	ASET multifunctional controller
Operation panel	7-inch color touch screen, display set temperature, measured temperature.
Temp. record	Temperature curve and fault record, U-disk data export, excel format.
Inside circulating air	2100 m³/h	2750 m³/h	4500 m³/h	2750 m³/h	4500 m³/h	2750 m³/h	4500 m³/h
	When it is open, the internal circulation fan automatically turns off. The touch screen displays open state.
Compressor	Emerson Copeland, adopt cascade refrigeration technology
Intermediate heat exchanger	KAORI Plate heat exchanger
Dry filter	Emerson
Expansion valve	Electronic expansion valve
Evaporator	Copper-tube with aluminum-fin
Cooling Type	Air-cooled with water-cooled auxiliary functions (Ensure good cooling capacity when temp. above 30℃)
Means of insulation	Polyurethane foam insulation, thermal insulation layer 150 mm, with embedded FIR boards
Safety Protection	Self-diagnosis function; Phase sequence phase failure protection; leakage protector; cooling unit overload protection; high and low-pressure switch, overload relay, thermal protection, high-temperature protection and temperature fault protection.
Case material	Outside is cold rolled steel painting, internal is SUS304 wire drawing board.
Refrigerant	Mix Refrigerant from LNEYA
Dimension	2200*1150 *1150	2700*1200 *1200	3100*1300 *1250	2900*1200 *1200	3200*1300 *1250	3000*1200 *1200	3300*1300 *1250
Power 380V 50HZ	12KW MAX	16.5KW MAX	20KW MAX	18KW MAX	25KW MAX	23KW MAX	30KW MAX
Weight	570kg	680kg	850kg	750kg	900kg	800kg	980kg
Optional	High temperature reaches 80℃ and temperature accuracy is ±0.5℃；the input power will be changed.
Optional	Temp. accuracy ±0.5℃
Optional	Cooling and heating program controlled, meet cold treatment process requirements(can set 5 programs, each  program can edit 45 steps.)
Optional	Interior door, reduce cooling capacity lost when picking small workpieces (temperature below 60℃ optional)
Optional	Outside SUS304 wire drawing board case
Optional	Diameter 50mm cable hole
Optional	Electric heating vacuum glass observation window (with lighting) 200mm*300mm
Optional	Low temperature automatic defrost (can be once per hour or use manual button to defrost), ensure it can work at low temperature for a long time even the door is open and close frequently）

If the low temperature refrigeration system has been frosted, believing that some enterprises have met, then how should we deal with such situation? Are there any methods can solve this problem. Today, let's know something about it with Guanya refrigeration company.

1. First turn off the suction valve of the low temperature box compressor and unload to the minimum number of cylinders to operate.

2. Then close the liquid supply valve of the intermediate cooler and close the suction valve of the small high pressure cylinder.

3. After the high pressure cylinder is returned to normal, open the suction valve of the large and low pressure cylinder again. When  the normal operation has been resumed, then supply the liquid to the intermediate cooler.

4. If the frosting of high pressure cylinder is severe, the operation of the unit must be stopped.

5. Drain the intermediate cooler.

6. The cooling water treatment is the same as the single-stage treatment.

Do you remember the above way of processing? If you still have some questions, please contact the customer service on the official website of Guanya refrigeration company immediately, and solve the problem in time!

Contact Lneya for more.