1. Central air conditioning unit: Its function is to provide cold (hot) water source required for air conditioning. According to the refrigeration method, it is divided into electric refrigeration and thermal refrigeration. Electric refrigeration units are: piston type cold (hot) water unit, centrifugal chiller, screw type cold (hot) water unit. The hot refrigeration units are: direct-fired lithium bromide absorption cold (hot) water units and steam and hot water lithium bromide absorption cold (hot) water units.
2. Air treatment terminal equipment: its function is to cool, heat, humidify, dehumidify and purify and filter the air. The conventional equipment includes fan coil, air cabinet, combined air conditioning unit, fresh air unit, etc.
3. Air duct system: Its function is to introduce outdoor fresh air, transport the treated air to each air conditioning area or transport the air to be treated to the air treatment terminal equipment. Conventional equipment has all kinds of air supply outlets and fans.
4. Air conditioning water system: its function is to transport the chilled water of the unit to the air treatment equipment or the hydraulic pipeline system at the end, for the water-cooled chiller, there is also the cooling water system that transfers the heat of the unit to the cooling tower, and the power equipment that transmits chilled water or cooling water is the pump.
5. Control system: Its function is to manually or automatically adjust and monitor the unit, air handling equipment and air conditioning process during the operation of the air conditioning system. The conventional control device includes a sensing element, an actuating and adjusting mechanism.
6. Comfort air conditioning: make the air-conditioned room meet the requirements of people's lives, and control the air parameters of the room with the comfort requirements of the human body.
7. Process air conditioning: also known as constant temperature and humidity air conditioning, the indoor air temperature, humidity, airflow speed, cleanliness, freshness and other parameters are controlled within a certain range to meet the requirements of the production process.
8. Refrigeration capacity: The heat absorbed by the refrigerant on the low pressure side in the evaporator during the refrigeration operation of the air conditioner per unit time. The common unit is W or KW.
9. Performance coefficient: The ratio of the refrigeration (heat) power consumed in the refrigeration (heat) cycle is the performance coefficient. When refrigerated, it is called energy efficiency ratio and is represented by COP; When heating, it is the performance coefficient, expressed in EER.
10. Refrigerant: refrigerant is the refrigerant working medium, which is the working medium for completing the refrigeration cycle in the refrigeration system. The refrigerant absorbs the heat of the cooled object in the evaporator and evaporates, and transfers the heat to the surrounding air or water in the condenser and is condensed into a liquid. The refrigerator achieves the purpose of cooling by means of the state change of the refrigerant. Common refrigerants: ammonia, freon, R-134a, R-404A refrigerant, R-410A refrigerant, azeotrope refrigerant, hydrocarbon refrigerant.
11. Carrier refrigerant: The carrier refrigerant refers to the intermediate medium used to transmit the cold amount in the indirect refrigeration system. After the refrigerant is cooled in the evaporator, it is sent to the cooling equipment to cool, absorb the heat of the cooled object or the environment, and then return to the evaporator to be re-cooled by the refrigerant, so that it is constantly circulated to achieve the purpose of continuous refrigeration. Common refrigerant: brine solution, ethylene glycol.
12. Modular machine: equipment used for cooling and heating. Module machine (can be module splicing unit), central air conditioning is divided into fluorine machine (including multi-on-line) and water machine two, these two models have module machine, generally the working principle of this model will be different due to the use of different media, but follow the law of conservation of energy.
13. Screw chiller: Screw chiller is a large and medium-sized refrigeration equipment that provides chilled water. Commonly used in national defense scientific research, energy development, transportation, hotels, restaurants, light industry, textile and other departments of air conditioning, as well as water conservancy and power engineering chilled water. Screw chiller is a complete refrigeration system composed of screw refrigeration compressor unit, condenser, evaporator and automatic control components and instruments. It has the advantages of compact structure, small size, small footprint, easy operation and maintenance, smooth running, etc., so it has been widely used. Its single cooling capacity from 150 to 2200KW, suitable for medium and large projects.