The chiller is divided into two types: air-cooled chiller and water-cooled chiller. The chiller is divided into a low-temperature chiller and a normal-temperature chiller in temperature control. The room temperature is generally controlled within the range of 0 to 35 degrees. The temperature control of the cryostat is generally in the range of 0 degrees to minus 100 degrees.

Air cooled chiller

In fact, the compressors used in air-cooled chillers and water-cooled chillers are basically the same, but the condensers they use are different. The compressor is the core part of the chiller, and its quality determines the quality of the chiller.

The difference between the air-cooled chiller and the condenser of the water-cooled chiller is that the water-cooled chiller generally adopts a shell-and-tube type, or a coil type (also called a coil type), and uses a plate exchanger as a condenser in the industrial chiller industry. The air-cooled chiller generally uses a finned aluminum fan with a centrifugal fan to heat the heat of the chiller.

Condenser

The zero-degree holeman first uses the type of condenser as a case to explain: the condenser is one of the four major components of the chiller. Its design method, material, heat exchange range and style type may affect the chiller refrigeration. The stability of the effect. Therefore, depending on the type of unit used, the type of unit, etc., the type of condenser selected is different.

1. In cold equipment (such as chillers with smaller cooling capacity), air-cooled cooling condensers are usually used for convenience. When air-cooled, the condenser is divided into two types: forced ventilation and natural convection. Water-cooled condensers can also be used in chillers with relatively large cooling capacity (above 10kw). Water-cooled condensers used in small chillers have both tubular and horizontal shell and tube condensers.

2, ventilated air-cooled condenser with air as the cooling medium, suitable for water shortage or water supply, especially in small air-cooled chillers with freon as refrigerant. The purpose of cooling is achieved by heat exchange between the fan mounted on the top or side of the unit and the air. The air-cooled chiller is compact in structure, easy to move, simple to install, and requires no auxiliary equipment. It is especially common in the machinery and equipment industry.

3. The cold casing type condenser is simple in structure, convenient in manufacture, and the condenser occupies a small space, which makes the water-cooled chiller small in size and light in weight. Therefore, the casing type condenser is relatively more in the unit type air conditioning unit and other cooling capacity. Large small water-cooled chillers are widely used. In general, the water consumption of the casing condenser is smaller than that of the horizontal shell and tube condenser, and single cleaning is more difficult. Therefore, the casing condenser should use cooling water with good water quality.

Tips for zero-degree chiller: Zero-degree chiller, choose the condenser according to customer's demand. If the cooling capacity is relatively large, horizontal shell-and-tube condenser can be used. In the horizontal shell-and-tube condenser, water flows in the shell tube, which inevitably forms scale on the tube wall and affects heat transfer. When cleaning, the ends of the ends must be removed, and the inner diameter of the heat transfer tube is usually small. Cleaning is very inconvenient. In order to reduce the number of cleanings or not to clean, the horizontal shell-and-tube condenser should use cooling water with good water quality. (If the water quality can not meet the requirements, it is recommended to use an air-cooled chiller, as mentioned later).

Water-cooled chillers are typically used for indoor installation and operational intent, and are ventilated by a separate circulating cooling water condenser and connected to an outdoor cooling tower.

Water-cooled chiller

 Air-cooled chillers and water-cooled chillers are used for outdoor installation and operation. The air-cooled chiller is mechanically circulated directly from the air, and the machine's condensing coil directly expels the heat of the atmospheric air to cool. Coolers are similar, except that they implement a water mist in the condenser coil to help the condenser cool, making the machine cooler more efficient than conventional air. No remote cooling towers usually require air to cool with the package.

The air-cooled chiller contains a heat-insulating water tank and a water pump in its body, eliminating the need for a cooling tower to dissipate heat. Installation and movement are very convenient. However, it requires a high working environment. First, because it is hot air circulation. Refrigeration, so if the ventilation effect of the installation workshop is not good, it will directly affect the cooling effect of the chiller. In addition, if you want to put the chiller in the dust-free workshop with humidity requirements, then I advise you to modify Water-cooled. Because of the air-cooled chiller, water vapor is sprayed on the top of the machine to dissipate heat.

Water-cooled chillers can be divided into open type, sealed type (some called box type) and screw type. First of all, it must be stated that the water-cooled chiller must be additionally equipped with a cooling tower and a water pump to extract hot water for heat dissipation. In order to achieve a good cooling effect.

The open chiller has to be equipped with a separate water tank. The seal type is not necessary because it has a built-in water tank. The open type is usually installed somewhere outside the workshop. It is easy to repair, but because it is not beautiful, it is A sealed water-cooled chiller was produced, which is popular because it is a box structure. However, if you have a very large demand for cooling capacity, you should use a screw-type chiller. At this time, we will generally call it a chiller.

Air-cooled chillers can be used on small systems, most of which are water-cooled. The initial investment in water cooling is less than that of air-cooling in terms of the main engine. But with the cooling tower and the machine room\electronic water treatment instrument, there is no place to go! In addition, for the long-term operation, the cooling of the water-cooled unit Efficiency will decrease relatively, and wind cooling will not.

The air-cooled chiller adopts the air cooling method, which eliminates the cooling tower, cooling water pump and piping system essential for the cooling water system, avoids the condensation of the condenser, the blockage of the water pipe in the water quality area, and saves water resources. At present, the most economical and simple models of maintenance and repair of cold water air conditioning equipment.

The air-cooled chiller has a slightly higher one-time investment than the water-cooled chiller, but the annual operating cost is lower than that of the water-cooled chiller. The construction cost of the machine room is the least among various air-conditioning cold and heat source systems, and the maintenance cost is about water-cooled. Or half of the cost of the boiler, the air-cooled chiller is louder than the water-cooled chiller and can only be installed outdoors. Most of the water-cooled units are installed in the basement.

Air-cooled series chiller waterless loss is suitable for areas with lack of water resources and poor water quality. Due to forced ventilation, there is no need to worry about icing, and it is also very suitable for use in northern winter. The water-cooled series chillers need to be used with cooling towers. In areas with abundant water resources, due to the external cooling tower, it is necessary to clean the cooling towers and pipelines regularly. In winter, it is necessary to prevent icing, but the cooling effect is better than that of the air-cooled series. It is more common in the summer and the high temperature in the south, and the noise is more common. Small is ideal for production and test environments where noise is required.

It can be seen that the air-cooled chiller and the water-cooled chiller that we usually refer to refer to the cooling method of the chiller itself. If it is cooled by air, it is an air-cooled chiller (generally the chiller comes with cooling). The type of fan and finned heat exchanger), if it is water cooled, it is a water-cooled chiller (generally connected to the cooling tower and cooling pump), but no matter which chiller, the final cooling medium or water .

Guangdong Zero Degree Heating and Cooling Technology Co., Ltd. The company is located in Zhongshan City, Zhongshan City, Guangdong Province. It sells chilled water machine, industrial chiller, screw chiller, Guangdong chiller, small chiller, high temperature heat pump, high temperature double effect heat pump and drying heat pump. , refrigeration accessories and other products, the company adhering to the user needs as the core, adhere to the "quality in place, first-class service" business philosophy, in the machinery and industry equipment - refrigeration equipment industry has won the unanimous recognition and high praise from customers, the company believes that customers create value For your own responsibility, look forward to serving you!