Introduction
This series of unitary air cooler units is a series of air cooler equipment that our company has studied, designed and developed with great concentration on the basis of the original constant temperature and humidity air cooler units and in combination with the latest scientific and technological development. It is a key scientific research project of our company for many years. The technical performance, type and specification of the products are at the leading level in China. Adhering to the design concept of "high efficiency, energy conservation, environmental protection and health", this product is a high-performance product that meets the new characteristics of the 21st century. The overall design of the product is reasonable, and it has the advantages of full function, compact structure, small size, light weight, low noise, safe operation and high reliability. It can be widely used in national defense, scientific research, culture, education, health and pharmaceutical industries; And air cooler in different environments such as factory buildings, hotels and shopping malls.
Principle
The operation of the constant humidity and constant humidity machine system is through three interrelated systems: refrigerant circulation system, air circulation system and electrical automatic control system
Refrigerant Circulating System:
The liquid refrigerant in the evaporator absorbs the heat of the air (the air is cooled and dehumidified) and begins to evaporate. Finally, a certain temperature difference is formed between the refrigerant and the air. The liquid refrigerant also completely evaporates and becomes a gas, which is then sucked in and compressed by the compressor (the pressure and temperature increase). The gas refrigerant absorbs the heat through the condenser (air-cooled/water-cooled) and condenses into a liquid. After throttling through the expansion valve (or capillary tube), it will become a low temperature and low pressure refrigerant and enter the evaporator to complete the refrigerant circulation process.
Air Circulation System:
The fan is responsible for drawing air from the return air inlet. After passing through the evaporator (cooling and dehumidification), humidifier and heater (heating), the air is sent to the space required by the user through the supply outlet. The air sent out mixes with the air in the space and returns to the return air inlet.
Electrical Automatic Control System
Including power supply part and automatic control part. The power supply part supplies power to the compressor, fan, humidifier, etc. through the contactor. Automatic control is divided into temperature and humidity control and fault protection: The temperature and humidity control is to compare the temperature and humidity of the return air with the temperature and humidity set by the user through the temperature and humidity controller, and automatically operate the compressor (cooling, dehumidification), humidifier, electric heating (heating) and other components to achieve the automatic control of constant temperature and humidity. The fault protection control is achieved through the combination of pressure protection, time delay device, relay, overload protection, etc. to control the fault protection of compressor, fan, humidifier and other components.
Unit Characteristic
1. Advanced control. The unit is controlled by intelligent instrument or programmable logic controller (PLC) with high control accuracy and reliability. Remote control interface can be reserved for unit instrument to facilitate remote centralized control and save management manpower; Fully apply modern control technology and optimize the control model to ensure that the unit operation mode can adapt to the change of annual working conditions and improve the seasonal energy efficiency ratio of the unit;
2. Multiple protections. The unit is equipped with high voltage, low voltage, overload, short circuit, phase failure, overheating, under wind pressure and other protections, as well as interlock protection of water pump and fire damper;
3. The unit fully adopts scroll compressor (below 50Hp) with high energy efficiency ratio (EER) and semi enclosed screw compressor (above 60Hp).
4. With the seasonal energy efficiency ratio (SEER) as the optimization goal, the system matching theory is fully introduced, and the computer aided design technology is widely used to optimize the design (selection) of the structural parameters of each component of the refrigeration system, so that the performance matching between the components in the system is reasonable and can form a complete whole, so as to ensure its efficient and reliable operation under various working conditions throughout the year.
5. Fully apply modern control technology and optimize the control model to ensure that the unit operation mode can adapt to the change of annual working conditions and improve the seasonal energy efficiency ratio of the unit.
6. One machine is multi-purpose, with wide temperature control range (5~32 ℃) and high operation efficiency throughout the year. A fresh air ventilator interface is reserved, and users can configure a fresh air ventilator. In the transitional season and winter, the unit can automatically introduce the outdoor low temperature air into the room to achieve the purpose of ventilation and cooling. At the same time, it can reduce the operating time of the host to achieve the purpose of energy conservation. This feature is especially suitable for occasions requiring air exchange in transitional seasons and cooling in winter.
7. The unit uses environment-friendly working medium, selects environment-friendly materials, and adopts new technologies and processes that meet the environmental requirements, so that the whole process of the unit can meet the environmental requirements in an all-round way.
8. The unit can be equipped with an automatically controlled sterilization device to ensure clean air in the air-conditioned room.
Structural Features
1. Compressor: Imported compressor with high performance is selected, which is safe, reliable and has high energy efficiency ratio.
2. Fan: The centrifugal fan with high performance and low noise is adopted, which has the advantages of large air volume, high static pressure, low noise and smooth operation.
3. Heat exchanger: The imported American OAK production line has greatly improved the heat exchange efficiency of the heat exchanger.
4. Housing: Indoor unit: It is processed with Japanese AMADA equipment and has excellent appearance quality. The frame below 30Hp adopts the new aluminum alloy arc frame structure popular at home and abroad; Above 40Hp, a new rhombic aluminum alloy frame structure is adopted, which is compact, beautiful and modern.
Outdoor: the heat exchanger adopts one-time bending molding technology, which has beautiful appearance and good heat exchange effect. The shell is made of high-quality steel plate surface coating or stainless steel material, and the unit will never rust when placed in the open air.
5. Humidifier: High performance humidifier is selected, which has the characteristics of good control performance, high humidification efficiency, safety and reliability.
6. Heater: The ribbed high efficiency electric heating tube is adopted, with small volume and high thermal power conversion rate.
7. Refrigeration accessories: The expansion valve, filter, solenoid valve, high and low pressure controller, pressure gauge and other accessories are all famous brand products.
8. Defrosting mechanism: High reliability components and high-performance control mode are adopted to ensure the safe and reliable defrosting of the unit during low temperature operation, and complete and thorough frost treatment, thus increasing the heat exchange performance of the unit.
9. Insulation layer: High performance thermal insulation materials are used, with small thermal conductivity, high water resistance, anti-aging, flame retardant, and non-toxic.
10. Multiple protection: The unit is equipped with high voltage, low voltage, overload, short circuit, phase failure, overheating, under wind pressure and other protections, as well as interlock protection of water pump and fire damper.
11. Control mode: The constant temperature and humidity unit adopts high-performance programmable control instrument. High control accuracy and good reliability. The instrument is reserved with a remote control interface, which can facilitate remote centralized control by users and save management manpower.
Parameters and Specifications of Some Standard Models
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