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Composition Principle chiller systems and industrial applications Comments

  • Author:AMC
  • Source:AMC
  • Release on :2015-09-15
This article gives you a detailed explanation of what is chilled water machine, also known as chillers, chiller composition and function of the circulatory system, as well as in all walks of life in the chiller application:
    First, what isChiller?
    Chiller is a water-cooling equipment, water chiller is capable of providing a constant temperature, constant current, constant pressure of the cooling water facility. Chiller works by injecting water tank 先向 machine within a certain amount of water, by the water-cooled chiller cooling system, and then by the low-temperature cooling water pump water into the device to be cooled, chilled water chillers heat away after temperature rise high return flow to the tank to achieve a cooling effect. Cooling water temperature can be automatically adjusted according to the requirements of long-term use can save water. Therefore, chillers is a standard energy-saving equipment. You can also use a word overview of the room temperature by water cooling chiller compressor to a certain temperature in order to strengthen the cooling mold or machine. General output cold water temperature is 5 degrees, customers can special requirements of output temperature to 0 degrees.
    Then,ChillerComposition and functioning of the circulatory system function?
    Housing association:
Because the chiller's cooling capacity generally have 4,6,8,12 and 25KW etc. So basically cooling capacity 12KW less important because of its lighter models are made of aluminum alloy frame, metal spray interior door panels, all weight, such as weight tanks, pumps and compressors with angle iron frame of the whole of the bottom bracket welded be supported and completed fixed. Connection below the bottom bracket of the rubber feet, complete machine vibration; rubber foot gap and door cracks and ground to form the completed form natural convection natural cooling presses and pumps. The heavy machine 12KW above models, consider more rigidity, it made iron framework, but its structure is generally above.
    Chiller refrigerant cycle system:
    Evaporator liquid refrigerant absorbs heat in the water and began to evaporate, eventually forming a certain temperature between the refrigerant and the water is poor, the liquid refrigerant has completely evaporated into gas after the compressor suction and compression (pressure and temperature increase) , the gaseous refrigerant passes through the condenser (air / water) to absorb heat, condenses into a liquid, through the thermal expansion valve (or capillary tube) after throttling into the low temperature low pressure refrigerant into the evaporator, the refrigerant cycle is completed.
    Chiller refrigeration system basically consists of:
    Compressor: The compressor is the heart of the entire refrigeration system component, the refrigerant is compressed source of power. Its role is to input electrical energy into mechanical energy, the compressed refrigerant.
    Condenser: condenser in the refrigeration process and play the output energy of the refrigerant to be condensed effect. From the high-pressure refrigerant compressor discharge superheated vapor into the condenser, which is in the process of absorbing all of the heat work, including from the evaporator and the refrigerant compressor and the heat absorbed in the pipe are passed to the surrounding medium (water or air) away; high-pressure superheated vapor refrigerant condenses into a liquid. (Depending on the cooling medium and the cooling mode, the condenser can be divided into three categories: water-cooled condenser, air-cooled condensers, evaporative condensers.)
    Reservoir: reservoir installed after the condenser, the condenser and the discharge tube is in direct communication. Refrigerant liquid flows into the condenser should be unimpeded within the reservoir, so that you can take full advantage of the condenser cooling area. On the other hand, when the thermal load changes evaporator, liquid refrigerant requirement also changes, then, the reservoir will play a role in regulating and storage of refrigerants. Chiller refrigeration system for small devices, often do not install the reservoir, but the use of a condenser to adjust and store refrigerant.
    Drying Filters: In the chiller refrigeration cycle must prevent moisture and dirt (oil, iron, copper shavings) from entering, the main source of water is added trace moisture new refrigerants and lubricants contained, or due to the maintenance system and bring air into the water. If moisture is not excluded clean, when the refrigerant throttle valve (thermostatic expansion valve or capillary tube) is passed, because the downward pressure and temperature of the water will solidify into ice sometimes make obstruction, affecting the normal operation of the refrigeration apparatus. Thus, in the chiller cooling system must be installed in the filter drier.
    Thermal expansion valve: thermal expansion valve in the refrigeration system chiller both flow control valve, and throttle refrigeration equipment, which is installed between the filter drier and evaporator refrigeration equipment, its temperature package It is wrapped in the outlet of the evaporator. Its main role is to make high-pressure refrigerant liquid at room temperature, throttle down when passing through the thermal expansion valve, into a low-temperature low-pressure refrigerant wet vapor (mostly liquid, a small part of the steam) into the evaporator, vaporized in the evaporator heat, cooling to achieve the purpose of cooling.
    Evaporator: The evaporator is to rely on the evaporator refrigerant liquid (actually boiling) to be absorbed by the cooling medium heat exchanger equipment. It functions in a refrigeration system is to absorb the heat (or cold output). To ensure the evaporation process can be stable and lasting, we must continue with the refrigeration compressor pumped the gas evaporated, in order to maintain a certain degree of evaporation pressure.
    Refrigerant: Most industrial chillers used in modern industry are using R22 or R12 as the refrigerant. The refrigerant flowing in the refrigeration system refrigerant, its main role is to carry heat, and to achieve endothermic and exothermic changes in the state.
    Electrical automation systems: the traditional two electromechanical control and computer controlled. Former ease of maintenance, cheap; the latter tank temperature display and intuitive, but more expensive, higher requirements for maintenance personnel, not described in detail.
    Here, industrial production will need chiller Why do?
In recent years, with China's accession to WTO, the manufacturing sector has entered a golden period, and the market competition of product quality requirements also improved greatly. In fact, in the process of improving the product, manufacturers often overlook the subtle but important factor. In the production process, as machinery, tooling and industrial reaction continues to generate heat when the temperature exceeds the tolerance level of the unstable product quality materials, plastic products and electroplating production, for example of plastic products in the total cooling time period more than 80% the importance of reducing the cooling time shows that timely freezing water absorbs heat quickly reduce the temperature of the mold cavity, accelerate product shape, shortening the open face. Plating the plating solution capable of chilled water temperature decreases, and the temperature is constant within a certain range, so that the metal molecules with stable current rapid attachment to the plating surface, smoothing and density of the product increases.
    Finally, chillers are used in what place?
    In general, applicable to factories with a variety of plastic molding equipment. Also apply to the need to cool the temperature of the machine equipment, such as machine tools and other equipment. Also applies to cold and dry machines, dyeing industry, electroplating industry, food industry, sauna courses and other places need cooling water, jewelry processing and other industries.
    Industrial chillers (temperature range: + 20 ℃ TO -25 ℃ adjustable) is widely used in various industrial processes -
    1. Chemical (school) industry: mainly used in chemical reactor (chemical heat exchanger) cooling cooling, timely away the tremendous heat generated by a chemical reaction in order to achieve cooling (cooling) aims to improve product quality.
    2. plastic products, plastic containers, film, plastic profiles, pipes, wire, cable sheathing, the tire industry: Plastic products (televisions, computers, washing machines, mobile phones, refrigerators, air conditioners, plastic toys, plastic car parts, etc.) The injection molding process, the ability to timely and effective cooling (cooling), will directly affect the surface finish and appearance of products passing rate, which affects productivity, affecting production costs and profits. Plastic containers (blowing) and production of packaging films, even more inseparable from the chiller (chiller). Plastic containers in the production process, such as not timely cooling stereotypes, produced by the container will not be full, uneven wall thickness, color is not bright, not even molding, resulting in lower product quality. Packaging film production if there is no cold water (wind) cooling molding is not possible to produce qualified products. Such as the use of chiller (chiller) to provide cold water (wind) to cool, not only can greatly improve product quality, but also improve productivity.
    3. plating and machine tool cutting fluid cooling industry: electroplating production, plating solution in the plating reaction produces not of the heat, so that the plating solution temperature gradually increased, when the plating solution temperature above process requirements, to produce the electroplating products surface coating firmness, uniformity, flatness and surface finish have a greater impact. Frozen provided with selected chiller (chiller) in the production process of the electronic components required to make the component holding or cooling the electronic components to control the performance parameters in the design of state at a particular temperature. Temperature water to cool and maintain the plating solution, plating production technology and production will greatly improve efficiency. Cooling machine cutting tool coolant, the temperature of the blade portion control tool will directly affect the life of the tool and product quality.
    The pharmaceutical industry: the pharmaceutical industry, mainly for the production workshop temperature, process control and production of raw materials drug reaction heat and humidity out.
    5. Electronic Industry: electronic components in the production process so that the need to maintain or cooling components, electronic components can be controlled performance parameters in the design of state at a particular temperature.
    6. Hardware 7. Food and Beverage Industry Footwear Industry 8. 9. Laboratory 10. 11. optical instruments and other medical equipment.