Analysis of Advantages and Disadvantages of Screw Water Chiller

Compared with other types of chillers, the overall energy consumption of high-quality screw water chiller is relatively small. Because the production technology of screw water chiller is more advanced and less energy is used, the equipment can quickly realize the purpose of reducing space temperature. The more screw water chillers are used in enterprises, the stronger the ability to reduce space temperature per unit time is, thus providing conditions for enterprises to reduce energy consumption costs. The longer the enterprises use screw water chillers, the less energy they consume as a whole.

Because screw water chillers are designed and manufactured with advanced production technology, the overall failure rate is low. Even if the screw water chiller is used uninterruptedly for a long time, the screw water chiller will not have more faults. The fewer faults the screw chiller produces, the higher the safety factor of the enterprise using the screw water chiller, so as to provide technical guarantee for prolonging the service life of the equipment.

Although the cooling performance of screw water chiller is very high, there are still many potential safety hazards when using screw water chillers. Because screw water chillers use more accessories, if a single component fails, it will threaten the normal operation of the equipment, and even lead to irreparable failure of the equipment. When enterprises use screw water chillers, they must be carefully tested to prevent all kinds of faults, so as to ensure that the long-term uninterrupted operation of screw chillers will not have any faults.

How to prevent malfunction? If the screw water chiller fails many times, it will threaten the safety of the equipment. Before using the screw water chiller, it is necessary to carry out a comprehensive inspection of the equipment regularly, which can detect and deal with all kinds of faults in time, so as to prolong the service life of the equipment and help enterprises reduce the space temperature in the shortest time.

Recirculating Air Control System

Description & Application:

1. Widely used in the semiconductor device for testing high and low temperature.
2. Independent refrigerated air recirculating unit.
3. Can work for a long time continuously, defrosting automatically and it can not affect the storage temperature in the process of defrosting.
4. Modular design and replace easily for standby machine,(If there are 10 sets of machines, only one standby machine is enough).
5. Solve the problems of open or close the door frequently and frosting problem in evaporation system, it will not affect the temperature of the cold storage&cryogenic box in the process of defrosting in evaporation system.
6. Easy installation (joint the box according to mechanical drawing, connect the electricity and water and set temperature completely to work).

 Technical Parameters:

Model		AI-635W	AI-655W	AI-6A10W	AI-835W	AI-805W	AI-810W
Recirculating air temperature range ℃		-65℃~125℃	-65℃~125℃	-65℃~125℃	-85℃~125℃	-85℃~125℃	-85℃~125℃
Control mode		PID adaptive controller
Communication protocol		MODBUS RTU Protocol, RS 485 Interface
Temperature feedback		PT100
Input & display		7-inch color touch screen controller, temperature curve record, data export to excel format.
Temp. accuracy		±0.2℃
Heating power		3.5kW	5.5kW	10kW	3.5kW	5.5kW	10kW
Cooling  capacity	125℃	3.5kW	5.5kW	10kW	3.5kW	5.5kW	10kW
	50℃	3.5kW	5.5kW	10kW	3.5kW	5.5kW	10kW
	20℃	3.5kW	5.5kW	10kW	3.5kW	5.5kW	10kW
	0℃	3.5kW	5.5kW	10kW	3.5kW	5.5kW	10kW
	-20℃	3kW	4.2kW	7.8kW	3.5kW	5.5kW	10kW
	-40℃	2.1kW	3.2kW	4.6kW	2.5kW	3.9kW	7.1kW
	-55℃	0.8kW	1.2kW	2.2kW	1.6kW	2.4kW	4.2kW
	-75℃				0.9kW	1.3kW	2.2kW
Circulating air flow		400m3/h	900m3/h	1300m3/h	400m3/h	900m3/h	1300m3/h
Connection size(outlet/inlet air)		DN-100	DN-100	DN-125	DN-100	DN-100	DN-125
Compressor		Scroll Copeland Compressor
Evaporator		Copper pipe aluminium fin (LNEYA)
Safety protection		Self-diagnosis function; freezer overload protection; high pressure switch, overload relay, thermal protection device, liquid low level protection, high temperature protection and temperature fault protection.
Defrosting device		There are installed defrosting device and condensate drain inside
Continuous work		Can work continuously
Timing on & off operation		Can set a key time for starting up & stop
Refrigerant		R404A R508B	R404A R508B	R404A R508B	R404A R508B	R404A R508B	R404A R508B
Air pressure		4bar	5bar	5bar	4bar	5bar	5bar
Water-cooled W (temp.20 degree)		1200L/H 1.5bar~4bar	1800L/H 1.5bar~4bar	3200L/H 1.5bar~4bar	1600L/H 1.5bar~4bar	2600L/H 1.5bar~4bar	3400L/H 1.5bar~4bar
Product Dimension		650*750*1500	700*800*1650	700*800*1650	650*750*1500	700*800*1650	700*800*1650
Weight (water cooled)		280kg	315kg	380kg	300kg	360kg	420kg
Power		AC 380V 50HZ 7.5kW (max)	AC380V 50HZ 10.5kW (max)	AC 380V 50HZ 19kW (max)	AC380V50HZ 9kW (max)	AC380V50HZ 12kW (max)	AC380V50HZ 22kW (max)
Case material		SUS 304	SUS 304	SUS 304	SUS 304	SUS304	SUS304

How to clean air control system?

In order to respond to the requirements of the two types of society in the country, environmental protection and conservation have become increasingly important. Therefore, in order to extend the life of the air control systems, it is still necessary to have some knowledge of maintenance, and the most important thing to maintain is to say clean. Here, Guanya Refrigeration introduces some small methods for cleaning the air cooling system:

More traditional methods are scraping and brushing. Sweep the place where you need to clean and the brush. The dirt that cannot be easily wiped off can be scraped with a sword. The second step is to use high-pressure water or chemical cleaning (mainly pickling), only to get high-pressure water or chemical water in the place where there is dirt to carry out chemical reactions, so that the dirt can be off.

However, this more traditional method does not generally clean thoroughly, and cleaning with chemical water may also cause corrosion to the equipment and damage the machine. After the chemical waste has been washed away, it will take a lot of money to process it. Therefore, cleaning agents can be used. This is also relatively environmentally friendly, safe, and thorough in cleaning. Generally, oxidation does not occur, which is beneficial to the service life of the air cooling system.


Contact Lneya for more.