Heat Pump System

Air Source Heat Pump

Product introduction：

Air source heat pump is a kind of energy-saving device that can make the heat flow from the low heat source air to the high heat source.

GRAD air source heat pump/chiller has accumulated nearly two decades of engineering practical application experience,condensed the essence of design,manufacturing and application,the unit has a number of core technologies such as low temperature and strong heat,multiple antifreeze,intelligent defrosting,intelligent control,high operational reliability,wide operating range,product diversity,Widely used in hotels,shopping malls,office buildings, exhibition halls, airports,stadiums and other public places,and it can meet the electronic,pharmaceutical,

biological, light textile,chemical industry,metallurgy,electric power,machinery and other industries of technology on the different use of air conditioning system requirements.

Low ambient temperature air source heat pump/chiller

● Adopt the internationally leading EVI air jet high-efficiency compressor with turbine direct injection enthalpy, quasi-two-stage compression, the medium pressure gas supplement, increase the suction capacity of the compressor, improve the heating efficiency.

● The main valve and auxiliary valve are all intelligently and accurately adjusted by electronic expansion valve, and the refrigerant flow control is more accurate, improving the reliability and heat transfer efficiency of the unit.

● It can operate stably at -30℃ temperature, and is an ideal product for replacing boilers for heating in northern winter.

Application scope

Comfort air conditioning systems: large supermarkets or commercial complexes, hotels, shopping malls, office buildings, exhibition halls, airports, stadiums, etc.

Process air conditioning systems: electronics, biology, light textile, chemical engineering, metallurgy, pharmaceuticals, power, machinery, etc.

About us

GRAD Group devotes itself to be a central air conditioning customization expert around you and provides you a comprehensive energy solution, GRAD possesses national mechanical and electrical equipment installation Class I qualification and purification equipment installation Class II qualification. GRAD has the overall project contacting ability. It has contracted national class and provincial class technology research projects for many times. The accumulated patents for technolog achievements has passed 110 items. There are more than 300 senior engineers available for central air conditioning design and solution. The 700,000 ㎡ manufacturing base includes the whole central air conditioning series: from chiller to terminal products. The high efficient falling film centrifugal chiller maintains domestic leading position and the large fan wall air handling unit has filled domestic blank and been listed in the national torch plan. GRAD has the national class air conditioning testing center and has passed CNAS certification. The products quality can be well guaranteed. Some of projects gained China Construction Project Luban Prize and National High Quality Project. At the same time, GRAD has established more than 30 offices all over China, such as Beijing, Tianjin, Shenyang, Xi’an, Wuhan, Nanjing, etc. The sales, design, installation and after sales network has covered every corner of China. Moreover, its products have been exported to more than 100 countries.