1, the product scope:
Water source (ground) source heat pump unit is widely used in hotels, shopping malls, office buildings, exhibition halls, airports, gymnasium and other public facilities comfortable central air conditioning system, and to meet the electronics, pharmaceutical, biological, textile, chemical, metallurgy, , Machinery and other industries of different air-conditioning system requirements.
2, product type and specifications:
Screw type (ground) source heat pump unit standard series of products a total of more than 130 different varieties of specifications, can use a variety of refrigerant, such as: R22, R407C, R134A, cooling capacity range of 193 ~ 3266kW. The unit can provide chilled water with temperature of 5 ~ 15 ℃ and hot water at 40-60 ℃.
3, the quality of the product level:
● Water (ground) source heat pump unit design, production and sales in strict accordance with the ISO9001 quality assurance system to ensure product quality.
● CNAS certification with international mutual recognition << cold water unit test room >>, for the chiller design, development and experimental research and product testing. Strict factory product quality off, so that users buy rest assured that the use of the Heart.
● Water (ground) source heat pump unit series of products by the national air-conditioning quality testing center determination, the technical performance indicators are higher than GB / T 19409-2013 "water (ground) source heat pump unit" standard, product quality and reliable, Has been praised the majority of users at home and abroad, market share year after year growth, has been in a leading position in the country.
4, the main technical characteristics:
 Featured brand-name accessories, unit efficient, energy saving, durable:
① units of the compressor, expansion valve, heat exchanger, controller and other key components are selected well-known brand manufacturers of products to ensure that the unit efficient, energy saving and durable.
② unit insulation material for the flame retardant materials, to avoid human factors caused by fire accidents, to ensure the safe operation of the unit.
Microcomputer controller expansion valve, solenoid valve
 complete unit control function, multiple safety protection measures to ensure the safe operation of the unit:
(1) the unit has the control function:
● Unit start and stop control ● Remote, short-range control selection
● Unit program setting ● Return water temperature control setting
● automatic control of energy regulation ● high water temperature and low water temperature limit alarm
● anti-freeze protection settings ● compressor start and stop program management
● Compressor manual management ● Unit timing management
● Pump management ● Programmable temperature management
● Full-function operation parameter display ● Fault alarm and diagnostic function
(2) the unit has the security function:
Compressor phase sequence protection ● Compressor overload, overheat protection
● Condenser fan, motor set overheat protection ● The system is equipped with high and low pressure protection device
● The system has the necessary safety valve, bleed valve, sewage valve
● The heat pump unit is equipped with energy control valve to ensure the safe and reliable operation of the unit
● electrical components with anti-electric shock protection
● antifreeze protection
● The system is equipped with water protection
 unit control system is highly intelligent, with centralized monitoring and remote monitoring interface:
① unit using Bomicro microcomputer controller, unit control intelligent, touch control screen, Chinese display, user-friendly.
② high degree of automation, full-featured, to achieve the unit start and stop program management, timing control, water pump management, full-function fault alarm and fault self-diagnosis function. Optional RS485 / RS232 communication interface, user-friendly unit to achieve centralized monitoring and remote monitoring.
③ use three password protection, to prevent the program and set parameters are free to change.
④ When the unit fails, immediately stop the operation, the alarm output fault signal and display the cause of the fault and where the fault, in order to facilitate troubleshooting and timely maintenance unit.
⑤ compressor and pump interlock control; for the valve and compressor synchronous action.
 refrigeration system multi-loop design, improve the unit's reliability and anti-jamming capability
The series of units such as the use of two or more than two compressors, according to each compressor for a refrigeration circuit design. Each compressor is a backup between each other, thereby improving the unit's reliability and anti-jamming capability.
5, ground source heat pump unit structural features:
 match brand high quality, efficient compressor:
The host uses a well-known brand of semi-closed screw compressors, compared with the piston compressor, semi-closed screw compressor has the following advantages:
① less parts (about 1 / 3-1 / 4 of the piston compressor), simple structure, less wearing parts, high reliability, long life;
② compressor suction and exhaust evenly continuous, low exhaust temperature, vibration is small, is not sensitive to wet compression, anti-liquid strike ability;
③ unit energy efficiency ratio ≥ 4.5, large unit energy efficiency ratio of up to 5.0;
④ In the energy regulation, the screw compressor is more advantages, the implementation of 25% -50% -75% -100% four energy regulation.
 match the high efficiency heat transfer tube shell tube evaporator:
1) dry type unit to match the high efficiency heat transfer tube dry shell and tube evaporator
① using the most advanced DAE efficient evaporative heat transfer tube, the tube surface of the long spiral ribs and spiral protrusion, the heat transfer coefficient and heat transfer capacity greatly improved.
(2) The internal structure of the evaporator is optimized and the efficient homogenizer is arranged to solve the problem of homogeneity of the refrigerant distribution.
③ improve the refrigerant water baffle sealing structure, to solve the baffle leakage and other issues, greatly improving the evaporator heat transfer efficiency, thus ensuring the unit to achieve a higher level of performance.
④ the use of a unique heat exchanger refrigeration process design technology, a reasonable system matching to ensure that the cooling process and the water side of the balance of the balance, give full play to the high efficiency of the heat exchanger; and reasonable system matching, the unit more energy efficient.
2) full liquid type unit matching high efficiency heat transfer tube full liquid evaporator
(1) the use of shell and tube full-liquid, single-loop or double-circuit refrigerant system design: the refrigerant in the shell side of the heat absorption, cold water flow through the tube was cooled. All the heat transfer tubes are infiltrated in the refrigerant, effectively increasing the heat transfer efficiency, improve the evaporation temperature.
1, (2) shell: production and testing are in line with NB / T47012-2010 "refrigeration device with the pressure vessel" standard requirements.
(3) brass: the use of the most advanced inside and outside to strengthen the rib wing technology for full liquid unit dedicated seamless copper.
(4) oil return (liquid) system: in the evaporator inside the oil-rich area leads to the return line, effectively with the electronic expansion valve control level. So that the unit to achieve the best running state.
 Shell and tube water-cooled condenser with high efficiency heat transfer tube:
① the use of the most advanced DAE efficient condensation heat transfer tube, the outer surface of the multi-head spiral ribs and spiral protrusion, the heat transfer coefficient and heat transfer capacity greatly improved.
② internal structure optimization design, greatly improving the condenser corrosion resistance, anti-fouling ability, give full play to the condenser heat transfer effect, thus ensuring the unit to achieve a higher level of performance.
③ shell and tube condenser also installed safety valve, release valve, etc., to ensure that the shell and tube condenser safety and cleaning, maintenance convenience.
 unit vibration design, to ensure that the unit low noise, low vibration:
① below the unit compressor spring or rubber shock absorber, vibration reduction efficiency of 85% or more, that is, vibration transmission rate of less than 0.15, reduce the unit vibration and system vibration, thereby reducing the unit noise.
② All the pipes in the unit system are fixed to the vibration tube, so as to avoid the noise caused by the vibration of the unit and the system.
 Match brand-name refrigeration system accessories:
(1) All the refrigeration system accessories used in the unit are made of brand-name products such as removable dry filter, expansion valve, liquid supply solenoid valve, liquid mirror, high and low pressure controller, exhaust temperature controller and so on. Of the brand-name manufacturers of products to ensure that the unit has a high level of performance.
② all the equipment by the 100% inspection before passing into the factory, to ensure that the unit refrigeration system work high reliability.
 match the advanced, highly reliable intelligent control system and control technology:
① multi-machine control system in addition to stand-alone automation configuration and function, but also have to show the operation of multi-unit, according to the return water temperature automatically determine the air conditioning system is part of the unit operation or all units running.
② optional RS485 / RS232 communication interface, user-friendly unit to achieve centralized monitoring and remote monitoring.
③ unit has a multi-compressor control of the balanced operation function to ensure efficient operation of the unit.
A) Unit energy regulation:
The unit according to the chilled water return water temperature logic calculation, control the operation of the unit and start and stop. Each unit uses four energy adjustment 100%, 75%, 50%, 25%, to achieve efficient operation of the unit.
 unit structure is reasonable, installation and commissioning, maintenance and management convenient:
① unit with a unique stack structure and box-type frame structure, compact and solid, with good mechanical strength, small footprint. The appearance of the unit by high-strength powder electrostatic spraying treatment, anti-corrosion rust, beautiful appearance.
② modular design, product adaptability, parts interchangeability, flexibility to carry out a variety of models to the most efficient way to provide users with the most thoughtful service.
③ unit layout is reasonable, according to ergonomic, optimized installation and maintenance space, to facilitate daily cleaning, maintenance and repair.
④ unit to machine in the form of factory, low-voltage part of the factory before the package insulation layer, the system has been filled with fluoride, arrived at the scene only after the water pipe connection. Turn on the unit and turn on the unit.
⑤ computer will automatically start the pump motor, compressor, and the unit's cooling, delay, interlock, protection and temperature of the automatic adjustment and other coordinated control. Thereafter, the unit is operated at the programmed temperature under the control of the computer and automatically adjusts the energy according to the change of the inlet water temperature of the evaporator.
⑥ unit installation flexibility, both on-site control can also be remote control, easy to check and maintenance.