Commonly Used Auxiliary Accessories and Refrigeration Methods for Industrial Chillers
Auxiliary accessories commonly used in water chillers, including water flow switches, pressure controllers, differential pressure controllers, temperature controllers and solenoid valves, as well as a brief introduction to three refrigeration methods, liquid vaporization refrigeration, gas expansion refrigeration and thermoelectric refrigeration.
One, auxiliary accessories commonly used in industrial chillers
1. Water flow switch
The water flow switch is used for the control or cut-off protection of the fluid flow in the pipeline. When the fluid flow reaches the set value, the switch will automatically cut off (or connect) the circuit.
2. Pressure controller
The pressure controller is used for pressure control and pressure protection. The unit has low pressure and high pressure controllers to control the working range of the system pressure. When the system pressure reaches the set value, the switch automatically cuts off (or connects) the circuit.
3. Differential pressure controller
The differential pressure controller is used to control the differential pressure. When the differential pressure reaches the set value, the switch will automatically cut off (or connect) the circuit.
4. Temperature controller
The temperature controller is used to control or protect the equipment. When the temperature reaches the set value, the switch automatically cuts off (or connects) the circuit. In our products, temperature control is often used, and the temperature of the water tank is used to control the start and stop of the unit. There are also some things like antifreeze that need to use a temperature controller.
5. Solenoid valve
When the compressor stops, the system circuit is cut off to avoid liquid shock when the compressor starts next time. Generally used in larger refrigeration systems.
Two, three refrigeration methods
1. Liquid vaporization refrigeration:
1) Compression: Normal temperature gaseous state becomes high pressure high temperature gaseous state.
2) Condensation: High-pressure high-temperature gaseous state changes to high-pressure liquid state.
3) Evaporation: High-pressure liquid turns into low-pressure gaseous state, absorbs heat, and realizes refrigeration.
2. Gas expansion refrigeration:
Gas expansion refrigeration uses the adiabatic expansion of high-pressure gas to achieve low temperature, and uses the reheating process of the expanded gas under low pressure to refrigerate. Due to the different equipment for gas adiabatic expansion, there are generally two ways: one is to use high-pressure The gas is expanded by the expander and has external power output, so the temperature drop of the gas is large, and the cooling capacity is also large when reheating, but the structure of the expander is relatively complicated. Another way is to expand the gas through a throttle valve without external power output. The temperature drop is small, and the cooling capacity is also small, but the structure of the throttle valve is relatively simple, which is convenient for adjusting the gas flow.
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