• May 17, 2021 Advantages & disadvantages of 5 compressors
    Advantages and disadvantages of 5 compressors Chillers are inseparable from compressors. There are various types and brands of compressors. Today we will talk about the advantages and disadvantages of five types of compressors. Advantages and disadvantages of 5 compressors 1.Half-sealed piston refrigeration compressor Semi-hermetic piston compressors are more commonly used in cold storage and refrigerated markets (commercial refrigerated air conditioning is also useful, but is now used relatively infrequently). The semi-closed piston type cold storage compressor is generally driven by a quadrupole motor, and its rated power is generally between 60 and 600 KW. Number of cylinders is 2-8, up to 12. Advantages: ⑴Simple structure and mature manufacturing technology; ⑵Low requirements for processing materials and processing technology; ⑶It is easy to achieve high compression ratio, so it is adaptable and can be used in a wide range of pressure. ⑷The device system is simple and can be applied to a wide range of pressure and refrigerating requirements. OUMAL uses Bitzer semi-hermetic piston compressor and Copeland butterfly valve compressor. Disadvantages: ⑴Big and heavy; ⑵Large noise and vibration; ⑶It is difficult to achieve high speed; ⑷Large gas pulsation; ⑸Many vulnerable parts and inconvenient maintenance; 2.Rotor refrigeration compressor The rotor refrigeration compressor is totally enclosed, which is generally used in household air-conditioning or small refrigeration equipment. The refrigeration capacity of the compressor is not high, at 3KW~ 15KW. Advantages: ⑴   Simple structure, small size and light weight. Compact size; ⑵ No suction valve, high speed, low vibration and stable operation; (3) Suitable for variable speed operation, with speed ratio up to 10:1; OUMAL uses Panasonic compressor. Disadvantages: ⑴High requirements on system cleanliness and processing precision; ⑵The leakage, friction and wear between the sliding plate and the cylinder wall surface are relatively large, with obvious performance degradation; ⑶The speed unevenness of single-rotor compressor increases at low speed; 3.Scroll refrigeration compressor The scroll refrigeration compressor is mainly in full closed structure, mainly used in air conditioning (heat pump), heat pump hot water, refrigeration and other fields. Supporting downstream products are: home air-conditioner, multi-on-line, modular machine, small water source heat pump and so on. Advantages: ⑴There is no reciprocating motion mechanism, so it is simple in structure, small in volume, light in weight, with few parts (especially vulnerable parts) and high reliability; ⑵Small torque variation, high balance, small vibration, stable operation and small vibration of the whole machine; ⑶High efficiency and variable frequency speed regulation technology in the range of refrigerating capacity; ⑷The scroll compressor has no clearance volume and can maintain high volume efficiency ⑸Low noise, good stabili...
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  • May 17, 2021 How to choose the right chiller for your process ?
    How to choose the right chiller for your process Heat is a single common by-product of today‘s manufacturing machines that include the advanced automation technology required for both high speed operation and high precision. Components such as spindle motors, variable frequency drives, laser and x-ray sources all require cooling to operate properly and reliably – most often in the very adverse manufacturing environments. Water chiller can help us reduce the heat generated in the production process, lower the temperature, so as to increase product output, improve product quality, and protect our production equipment. How to select the chiller? Refer to the following aspects: 1. Cooling capacity That is the cooling capacity of the chiller. According to the photoelectric conversion efficiency of the laser equipment, calculate the heat generated by it, and then match and select the appropriate industrial chiller. Different types of chillers will have differences in this aspect. If you are not familiar with this aspect, welcome to consult the professionals of Cooling Times. 2. Temperature control accuracy This indicator is entirely from the requirements of the laser. For semiconductor lasers, the temperature control accuracy must be ±0.1℃. This requires the compressor to predict the law of temperature changes and adapt to the load changes. Generally, it is impossible to use a water chiller with an integrated temperature control module To this point. Of course, for CO2 lasers, the temperature requirement is ±2℃ to ±5℃, and most of the dedicated water coolers on the market can do it. However, Cooling Times is currently one of the few laser chillers that actually reach ±0.1°C. 3. Water flow and booster pump head The cooling capacity represents the cooling capacity provided by the compressor, and the water flow represents the ability of the chiller to take away heat. This causes the phenomenon that everyone often sees: a chiller with a nominal cooling capacity of 1000W is connected to an 80W glass tube, and the chiller It shows 25℃, but the laser tube is very hot; in fact, it has no application effect. Of course, in addition to these aspects, the selection should also consider thermal efficiency and water volume, water quality requirements, water filtration and water circulation system materials... etc. Contact us to help you select the right chiller for your process. We have experienced engineer to make the best solution. We supply air-cooled chillers, water-cooled chillers, screw chillers…… OEM are welcome.
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  • May 17, 2021 What is a chiller ?
    What is a Chiller? Industrial water chillers are used in a variety of applications where chilled water or liquid are circulated through process equipment. Commonly used to cool products and machinery, water chillers are used in a multitude of different applications including injection molding, tool and die cutting, food and beverage, chemicals, lasers, machine tool, semi-conductors and more. The function of an industrial chiller is to move heat from one location (usually process equipment or product) to another place (usually the air outside the manufacturing facility). It is very common to use water or a water/glycol solution to transfer the heat to and from the chiller which may require the process chiller to have a reservoir and pumping system. Regardless of your industry and process, making sure that you have sufficient cooling is critical to productivity and cost savings. Industrial chillers are one type of chillers, and chillers can be divided into air-cooled chillers and water-cooled chillers. Water chiller is a kind of water cooling equipment, which can provide constant temperature, constant current and constant pressure cooling equipment. The principle of the chiller is to inject a certain amount of water into the internal water tank of the machine, and the water is cooled by the chiller refrigeration system, and then a water pump inside the machine injects low-temperature frozen water into the equipment that needs to be cooled, and the chilled water will heat the internal heat of the machine. Take it away and return the high-temperature hot water to the water tank to cool down again. In this way, it is circulated and exchanged and cooled to achieve the effect of cooling the equipment. In industrial applications, chilled water or other liquid cooling pumps are passed through processes or laboratory equipment. Industrial chillers are used in various industries to control the cooling of products, mechanisms and factory machinery. They are commonly used in injection and blow molding in the plastics industry, metal processing cutting oils, welding equipment, die-casting and machining, chemical processing, pharmaceutical formulation, food and beverage processing, paper making, cement processing, vacuum systems, X-ray diffraction, electric power Supply and power stations, analytical equipment, semiconductors, compressed air and gas cooling. They are also used to cool high heat energy, such as MRI machines and laser specialized engineering projects, and in hospitals, hotels and campuses. The chillers for industrial applications can be centralized, and each chiller can meet multiple needs for cooling, or be dispersed in each application or device with its own chiller. Each method has its advantages. It may also have a combination of central and decentralized chillers, especially when the cooling requirements are the same for certain applications or use points, but not all. Distributed chillers have a small area (cooling capacity) usual...
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  • May 17, 2021 Cooling water circulation system in injection molding workshop
    Cooling water circulation system in injection molding workshop In the injection molding workshop, the circulating cooling water of the chiller plays a very important role. It mainly supplies the injection molding machine oil cooler and barrel cooler device for heat exchange, requires temperature control and ensures the normal operation of the injection molding machine hydraulic system. Therefore, the chiller is also called "injection chiller".   The chiller is used in the injection molding workshop The main features of Omar Chiller: 1 The main engine adopts the new imported famous brand compressor from the United States and Japan, which has high temperature control accuracy and stable and reliable performance 2 The electrical parts are all the original products of the international brand "Schneider" to ensure the stable operation and long life of the machine. 3 Imported original brand water pump, large flow, high efficiency, and durable. 4 Equipped with precision digital display temperature controller, digital display temperature, can accurately control the water temperature ±1℃, set temperature range 5℃-35℃ 5 All stainless steel thick plate evaporator (shell and tube evaporator, water tank coil), built-in automatic water replenishing device, easy to clean and maintain. 6 The radiating cold row of the air-cooled unit is composed of fins and rows and rows of copper tubes, and the tube is expanded by mechanical expansion of the secondary flanging fins during manufacturing. 7 Industrial and advanced heat exchanger production lines to ensure high quality and high efficiency, equipped with automatic control and protection alarm devices, and fault signal output 8 Electrostatic spray plastic shell, European design, beautiful and generous 9 The exterior panel adopts quick disassembly and assembly form, which is convenient to use and maintain 10 Built-in safety protection, low noise, power saving and durable.
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  • July 05, 2021 The 240 HP air-cooled screw chiller was successfully tested
    The 240hp air-cooled screw chiller was successfully tested. 240 hp air-cooled screw industrial chiller for ink printing plant,This air cooled chiller use 2 sets of Hanbell semi-hermetic screw compressor, cooling capacity is 600kw, Outlet temperature is 12 degree.  With the efforts of the OUMAL Refrigeration workers, after 20 working days, this machine was finally completed and tested successfully. I wish our customers a better business with the help of this chiller. 
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  • September 17, 2021 Chinese Mid-Autume Festival & National Day Holiday Notice
    Holiday Notice Dear Valued Customer, Oumal Will celebratte the Chinese Mid-Autumn Day ( Moon Cake Festival )  and will on holidays from September 19th to September 21th, During the holidays, you are free to inquiry and place order for the chillers  All the orders will be arrange production on September 22th.   As there comes the Chinese National Day on October 1st, and we will off work from Oct. 1st to Oct.7th. If you have any questions about the water chiller or inquiry please send email to us, we will check and reply you. If anything urgent, Just call us or message on Whatsapp.  Will arrange the deliver of the chiller during working days. Thanks for your cooperation. Best Wishes!
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