Application characteristics and selection of chiller in various industries

Consultation: application characteristics and model selection of chiller in various industries I UV curing machine: Features: stepless dimming + water cooling + metal halogen lamp = energy saving + low temperature +, indoor water cooling (chabuchi chilled water chilled water) + air cooled exhaust heat, under the lamp tube add insulation quartz glass, effectively reduce the surface temperature of the object, protect the dry goods will not be hot deformation, prolong the service life of the lamp tube; CBE water cooling series Suitable for: offset press, gravure press, flexographic press, coating machine and other printing equipment at home and abroad Offset press such as: Germany Manroland, Heidelberg, gaobao, Japan Komori, Liangming, Mitsubishi, Sakurai, beiren, etc Gravure printing machines such as: Bost, Switzerland, serudi, Xi'an Heiniu, Zhongshan Songde some customers: Baoding special light source electrical factory; Zhisheng (Guangzhou) Technology Co., Ltd 2、 Ultrasonic cleaning machine: It has been proved by research that when the ultrasonic wave acts on the liquid, the rupture of each bubble in the liquid will produce a shock wave with great energy, which is equivalent to producing hundreds of degrees of high temperature and thousands of atmospheric pressure in an instant This phenomenon is called "cavitation effect" The ultrasonic cleaning uses the shock wave generated by the bubble rupture in the liquid to clean and wash the internal and external surfaces of the workpiece Use The second ultrasonic wave propagates in the liquid, making the liquid vibrate together with the cleaning tank under the ultrasonic frequency When the liquid vibrates with the cleaning tank, it has its own natural frequency, which is the frequency of the sound wave, so people hear the hum The suitable cleaning temperature of water cleaning solution Zui is 40-60 ℃, especially in cold weather, if the temperature of cleaning solution is low and the cavitation effect is poor, the cleaning effect is also poor Therefore, some of the cleaning machines around the outside of the cleaning cylinder heating electric wire for temperature control, when the temperature rises, cavitation is easy to occur, so the cleaning effect is better When the temperature continues to rise, the pressure of the gas in the cavity increases, resulting in the drop of the impact sound pressure, reflecting the multiplication of these two factors Finally, the industrial cold water of chuanben brand can reduce the temperature of cleaning agent, condense the gaseous cleaning agent, and effectively prevent the volatilization of cleaning agent 3、 The standard industrial water chiller of plastic injection, extrusion and blow bottle, press and blow film and calender film can be applied to the above industries Injection mold cooling: after the plastic particles are heated and melted, they are injected into the mold After condensation, the mold is opened and ejected to form the plastic workpiece In the continuous production process, it is necessary to cool the mold to shorten the plastic setting time, improve the dimensional accuracy, molding quality and surface quality of the workpiece Requirements for freezing water temperature: 6 18 ℃ chilled water temperature difference requirement: ± 2K or ± 0.5K cooling capacity of water chiller is related to injection volume of injection molding machine (usually referred to as "axis") The larger the injection volume, the greater the cooling capacity required The injection molding machine is usually nominal with "tons" of clamping force, so it is necessary to convert "tons" to "Anders", but "tons" and "Anders" are not one-to-one corresponding, the following table is only the conversion relationship under general conditions, and there is a certain upper and lower deviation 1 200 16.14001070 extruded pipes, trunking, cables and various plastic profiles After the heating and melting raw materials are formed by the mould, they are cooled by a freezing water bath, and the water temperature in the freezing water bath must be kept constant Because of the high production speed, large cooling capacity unit is needed If the existing frozen water tank is large enough, the unit can not be equipped with water tank Blow bottle mainly produces all kinds of mineral water bottle and steam water bottle Compressed air drying - clean and dry compressed air is required for bottle blowing The water in the compressed air can be removed by using the cold water provided by the industrial chiller as the cooling source Mould cooling - cold water can control mould temperature accurately, improve product quality and production efficiency The same chiller can be used as the cooling source for compressed air drying and mold cooling The common products of Zui are some small containers, such as yogurt cup plastic extruded by the mold heated at a constant frequency It is very important to keep a constant temperature, and the temperature range of chilled water is very high, so a proportional chilled water valve is needed to adjust the temperature The hydraulic system needs hydraulic system to open, close and inject materials The hydraulic oil absorbs the energy of the hydraulic pump and the temperature rises Generally, the oil temperature cannot be higher than 60 ℃ The cooling water temperature is about 27 ℃, which is suitable Because the water temperature is different from the mold, the electric water valve and the mold cooling circuit need to be separated or an independent cooling system is needed 4、 Laser technology in mechanical industry laser generator, beam controller and electric control cabinet in laser (laser) system may need additional cooling The temperature of frozen water is usually 15 Between 22 ℃, the accuracy of frozen water is usually ± 1K or ± 2K Some equipment may require ± 0.5K In addition, some equipment have certain requirements for frozen water conductivity, corrosion resistance, etc In the laser system, there are some requirements for the water temperature when it is started, so it is necessary to increase the electric heating in the water circuit In some systems, the beam controller requires an independent cooling loop For the special application of laser system, industrial chiller can be specially designed to meet different requirements Welding electrode, welding furnace and cutter need to be cooled For example, the cooling of electrode welding nozzle of large and medium-sized welding machines, the cooling of electric furnace for gold and silver hand finishing, etc are usually small to medium-sized water chillers Internal and external circulating water pump system or closed water tank system is required Cutting many cutting machine tools (machining center, lathe, milling machine, drilling machine, etc.) need high-speed rotation of cutter or spindle to generate heat, and also generate a lot of heat in the cutting process In these machine tools and equipment, the parts that need to be cooled usually include spindle, cutting fluid, lubricating oil, hydraulic oil, electric control cabinet, etc Non cutting machining such as EDM, polishing machine, grinder, etc When using the chiller, the water system is easily blocked by some iron filings, because some filters must be added Internal and external circulating water pump system or closed water tank system is required Model selection of chuanben industrial chiller 1 Calculate the heat output Q = sh × de × f × DT / 60 Q: heat output kW (Note: the heat output of chuanben 1p chiller is about 3KW) sh: the specific heat of specific hot water is 4.2kj/kg * C (4.2kj/kg * Celsius) and the specific heat of oil is 1.97kj/kg * C (1.97kj/kg * Celsius) De: specific gravity of water 1kg / L (1kg / L) specific gravity of oil 0.88kg/l (0.88kg / L) f: flow LPM (L / min / min) DT: temperature difference between the inlet and outlet of cooling water (oil) (outlet temperature - inlet temperature) Note: "/ 60" is used to change flow liter / minute to liter / second; 1kW = 1kj / S; example 1: cooling water inlet water is 15 ℃, outlet water is 20 ℃, flow 20 liter / min heating quantity Q = 4.2 × 1 When the cooling capacity of the chiller is 20 × (20-15) / 60 = 7KW, cbe-03w can be selected if the cooling capacity is increased by 20% - 50% Example 2: the cooling oil inlet is 18 degrees, the oil outlet is 26 degrees, the flow is 15 liters / minute, the heating capacity q = 1.97 × 0.88 × 15 × (26-18) / 60 = 2.6kw When the cooling capacity of the chiller (oil) is selected, cbe-02a can be selected if the cooling capacity is increased by 20% - 50% 2 The power and heat output of the equipment are estimated a If it is used for spindle cooling, the cooling capacity of the required refrigerating unit can be estimated according to 30% of the spindle motor power For example, 15kw motor can be equipped with 4.5kw or 5.8kw cooling capacity refrigeration unit; B injection molding machine can be calculated by 0.6kw cooling capacity per ampere or 3KW cooling capacity per 80t; 3 The heating capacity can be calculated by the temperature rise of water (oil) tank q = sh × de × V × DT / 60q: heating capacity kW sh: the specific heat of the specific hot water is 4.2kj/kg * C (4.2kj / kg * Celsius); the specific heat of oil is 1.97kj / kg * C (1.97kj / kg * Celsius) de: specific gravity of water 1kg / L (1kg / L) specific gravity of oil 0.88kg/l (0.88kg / L) V: water capacity L (L) including total water capacity in water tank and pipeline DT: Zui large temperature rise of water (oil) in one minute note: "/ 60" is used to change temperature rise Celsius / minute to Celsius / second; 1kW = 1kj / S; note: When measuring, the temperature of the water (oil) tank shall be slightly lower than the ambient temperature; and the equipment shall work under the load of Zui For example, if the water temperature with a large volume of 3000l Zui is 0.6c/min, the calorific value Q = 4.2 × 1 × 3000 × 0.6 / 60 = 126kw, cbe-50w can be selected by appropriately increasing the cooling capacity of the chiller by 20% - 50%; supplementary notes: 1 The cooling capacity of the chiller varies with the ambient temperature and the outlet water temperature; 2 The actual heating capacity of the equipment will also change due to different workpieces, molds, parameters, etc.; 3 After using the chiller, the temperature will drop, and the surface temperature of the connecting pipes, water tanks, oil tanks, molds, spindles and equipment will be lower than the ambient temperature, so the heat will be absorbed and the load will increase; 4 In the practical application of industrial cooling, many cases can not be accurately calculated by the above methods At this time, only empirical data, similar equipment analogy and other methods can be used for estimation 5 Any calculation method may have deviation, so that the actual selected refrigeration unit is too large or too small, so the above method is only for reference