Chiller is a kind of water cooling equipment, which can provide constant temperature, constant current and constant pressure cooling water equipment. The working principle of water chillers is to inject a certain amount of water into the internal water tank, cool the water through the chiller refrigeration system, and then send the low-temperature cooling water to the equipment to be cooled by the water pump. The chilled water of the chiller takes away the heat, and then rises in temperature and flows back to the water tank to achieve the cooling effect.
The refrigerant absorbs the heat of the cooled object in the evaporator and vaporizes it into steam. The compressor continuously draws the generated steam out of the evaporator and compresses it. The compressed high-temperature and high-pressure steam is sent to the condenser to release heat and condense into high-pressure liquid to cool the medium (such as water, air, etc.). After being depressurized by the throttling mechanism, it enters the evaporator, vaporizes again and absorbs the heat of the cooled object, thus circulating repeatedly. During heating, the refrigerant changes its flow direction through the four-way valve, which is just opposite to that during cooling. The refrigerant first passes through the evaporator, then returns to the condenser and finally returns to the compressor.
1. It is divided into piston chillers, screw chillers and centrifugal chillers according to compressor forms.
2. According to fuel types: fuel type (diesel oil, heavy oil), gas type (kerosene, natural gas);
3. According to the condenser cooling mode: water-cooled chiller and air-cooled water chiller;
4. According to the form of energy utilization: single-cooling heat pump type, heat recovery type, single-cooling and ice storage type;
5. According to the outlet temperature of cold water: high temperature type (7℃, 10℃, 13℃, 15℃), medium-low temperature type (-5℃ ~-30℃), and ultra-low temperature type (-30~-120℃);
6. Sealing method: open, semi-closed and fully closed;
7. According to the refrigerant: water-cooled chiller, brine chiller and glycol chiller;
8. According to energy compensation, it is divided into power compensation (compression type) and heat energy compensation (absorption type);
9. According to refrigerant: R22, R123, R134a, R404a, etc.
10. according to different heat sources (absorption type): hot water type, steam type and direct combustion type.
Plastic industry: Accurately control the mold temperature of various plastic processing, shorten the beer molding cycle and ensure the stability of product quality.
Electronic industry: stabilize the molecular structure of electronic components in the production line, improve the qualified rate of electronic components, and apply it to ultrasonic cleaning industry to effectively prevent expensive cleaning agents from volatilization and harm to people.
Electroplating industry: controlling electroplating temperature, increasing the density and smoothness of electroplated parts, shortening electroplating cycle, improving production efficiency and improving product quality.
Machinery industry: control the temperature of pressure oil in oil pressure system, stabilize the oil temperature and pressure, prolong the service life of oil, improve the efficiency of mechanical lubrication and reduce wear.
Construction industry: supply chilled water for concrete, make the molecular structure of concrete meet the requirements of building use, and effectively enhance the hardness and toughness of concrete.
Vacuum coating: control the temperature of the vacuum coating machine to ensure the high quality of the coated parts.
Food industry: It is used for high-speed cooling after food processing to meet the packaging requirements. In addition, the temperature of fermented food is controlled.
There are many users who open plastic products factories or need chillers to cool the circulating water and oil used in machines. When purchasing industrial chillers, they often don't know what type of chillers to use in order to achieve their required refrigeration effect, or what kind of machines are more suitable for their own production workshops.
First of all, it is necessary to find out which types of water chillers are divided into: ordinary manufacturers will produce water cooling and air cooling.
Air-cooled water chillers contain insulated water tank and water pump in its fuselage, which need no additional cooling tower to dissipate heat. It is very convenient to install and move. However, it requires higher working environment. First of all, because it is cooled by hot air circulation, if the ventilation effect in the installation workshop is not good, it will directly affect the cooling effect of water chillers. In addition, if you want to put the water chillers in a dust-free workshop with humidity requirements, then I advise you to modify the water-cooled ones because of the wind
Water-cooled chillers can be divided into open type, sealed type (some called box type) and screw type. First of all, it should be stated that water-cooled chillers should be additionally equipped with cooling towers and pumps to extract hot water to dissipate heat. In order to achieve effective cooling effect.
Open water chillers need to be equipped with another water tank, and sealed water chillers are unnecessary, because they have a built-in water tank. Open water chillers are usually installed somewhere outside the workshop, which is convenient for maintenance, but they are not beautiful enough, so they produce sealed water-cooled chillers, which are popular because they are a box structure.