Introduction to the performance of screw heat recovery chiller:

1. Multi purpose: Single cooling units can not only cool in summer, but also recycle the waste condensation heat to produce hot water, or cool separately.

2. The addition of a heat recovery device is equivalent to increasing the heat exchange area of the unit, enhancing the heat exchange effect, and thereby reducing the energy consumption of the unit. The comprehensive performance coefficient of the heat recovery air-cooled unit is as high as 3.5-3.9, and the comprehensive performance coefficient of the heat recovery water-cooled unit is as high as 5.6-6.3.

3. Compressor selection: The STH series heat recovery chiller unit adopts the most advanced 5:6 gear ratio imported semi closed twin-screw compressor. The compressor is equipped with an unloading energy control device, which can achieve multi-stage or stepless energy regulation. It has the advantages of high efficiency, low noise, small vibration, reliable operation, and long service life.

4. Humanized operating interface: using a Bangpu touch screen controller, the operation is simple and intuitive;

5. Multiple protections, safe and reliable: protection against overvoltage, undervoltage, phase loss, reverse phase, overload, winding overheating, and high exhaust temperature;

6. The unit has a compact structure, occupies a small area, has a simple pipeline design, only requires an external water system, and is easy to install and maintain.

7. Can execute unmanned management operation.

Semi closed screw compressor

The meshing ratio of the male and female screws in the semi closed twin-screw compressor is 6:5, supported by bearings lubricated with special refrigeration oil. A moderate meshing ratio can not only increase the refrigeration capacity but also ensure the balance of screw rotation.

The rotor of the screw compressor is sturdy and durable, and the unit is insensitive to wet conditions, ensuring safe operation under variable operating conditions.

The number of components in a screw compressor is only 1/10 of that in a reciprocating compressor, making it reliable and easy to maintain.

The compressor has fewer operating components, continuous compression, and less pressure fluctuation, resulting in low noise, minimal vibration, and low failure rate.

The compressor is equipped with a capacity regulating solenoid valve, motor protector, oil separator, and oil level sight glass, making it easy to operate and maintain

Efficient and energy-saving

The semi enclosed twin-screw compressor is equipped with a capacity regulating solenoid valve, which automatically adjusts the load output according to the working conditions and reduces power consumption.

The shell and tube evaporator with asymmetric tube bundle structure ensures that the refrigerant operates at the optimal and uniform circulating flow rate regardless of whether it is in gas or liquid state, thus not only fully evaporating the liquid refrigerant, but also minimizing the circulating negative force of the circuit.

Closed cell chloroprene insulation rubber is applied outside the evaporator to prevent loss of cooling capacity.

Unique and efficient heat recovery technology. Ensure that various compressors operate at full load under most variable load conditions, fully utilizing the efficiency of the compressors.

Electrical safety

The internal structure, electrical components, and wiring of the electrical cabinet are designed and manufactured in accordance with EN60204-1/IEc204-1 standards. The control power supply is isolated from the main power supply by a transformer, effectively preventing current surges and interference. The power supply is controlled by a pull rod circuit breaker and interlocked with the control box door, ensuring safety and reliability. Each compressor load is equipped with its own circuit breaker, fuse, and contactor. The control panel is placed inside a double-layer sealed door, with excellent electrical insulation performance, rain and moisture resistance, and can adapt to various harsh environments. The electrical system of the unit complies with EMC electromagnetic compatibility specifications.

Reliable work

The electrical insulation performance of the unit is excellent, and the intelligent microcomputer control system monitors the operation of the unit. The unit is equipped with high and low voltage switches, as well as protections such as overvoltage, undervoltage, phase loss, reverse phase, overload, winding overheating, exhaust temperature, oil pressure, water flow switches, oil temperature heaters, etc.

Heating elements are installed outside the evaporator to prevent freezing inside the evaporator.

Simple installation

The unit has completed the filling of refrigerant oil and R22 refrigerant before leaving the factory, and has been tested and elevated according to UNI9218 specifications. Only the water pipeline and power supply need to be connected on site to be put into use, providing users with cold water and recycled hot water.

Easy to use and maintain

The full computer control, menu display, unit electrical self check, operation, load adjustment, and safety protection are all completed by the computer control system, and daily operations only require turning on and off.

Multiple independent refrigeration systems, serving as backups for each other.

It has fault protection, storage, alarm, and print output functions, making faults clear at a glance.

The compressor, electrical control cabinet, control system, and related refrigeration components are installed in independent spaces isolated from the airflow. The panels of the closed system are all detachable and require maintenance while the unit is operating normally.

Low noise and low vibration

The compressor is installed in a closed space to effectively suppress noise.

The compressor is installed on a rubber damping pad, effectively reducing vibration.

Using non-metallic special materials to prevent the transmission of vibration.

intelligent control

The unit adopts a CVM intelligent microcomputer control system, which has functions such as remote switching, cooling and heating capacity control, water outlet temperature display and control, intelligent defrosting, programmable antifreeze protection, manual compressor start stop, compressor start delay, compressor hourly start limit, restart delay protection, partial winding start, compressor operation timing, refrigerant shutdown and start evacuation, fan speed control, built-in clock, electrical start self-test, alarm reset control, fault display, fault recording, etc.

Networking function

The microcomputer control system supports networking functions, multiple network protocols, and can be connected to CVM Manager, CVM interface board, remote monitoring software, remote BMS DDC, etc. It can provide open communication protocols and is compatible with almost all common building automation systems. It also has the ability to automatically calibrate and adapt to interfaces, as well as external connection circuit breaker alarm function. Convenient centralized control of intelligent buildings.