Air source screw heat pump chiller
This cold-climate air source heat pump maintains stable heating performance even under ultra-low ambient temperature down to -35°C, ideal for frigid northern regions.
Equipped with patented intelligent frost detection system for accurate frost sensing, the unit enables fast automatic defrost, effectively lowering defrost cycles and cutting total defrost duration to deliver consistent heating output.
Supports remote control via dedicated mobile APP, integrated with real-time fault early warning and one-click online diagnosis to cut on-site maintenance costs for HVAC contractors.
The air-to-water heat pump runs with high efficiency across an ultra-wide working temperature spectrum from -35°C to 43°C, fulfilling year-round cooling and heating demands in all climate zones.
Boasts superior energy-saving performance with COPh＞2.6, surpassing national standard energy efficiency thresholds; its IPLV(H) reaches Grade 1 energy efficiency standard, ranking among top-tier high-efficiency commercial HVAC equipment.
Air source screw heat pump chiller
GRAD Air-Cooled Screw Cold & Hot Water Unit (Air Cooled Screw Heat Pump Chiller) is an all-year air-to-water HVAC system for cooling and heating. This industrial screw air cooled chiller features eco-friendly, energy-saving and stable performance with anti-freeze protection, intelligent defrost and smart control tech. With wide operation range and diversified specifications, it serves central air conditioning projects for hotels, malls, airports and process cooling demands for pharmaceutical, chemical, metallurgy, machinery and electronics industries.
Product fertures
Single GRAD air-cooled screw heat pump unit delivers equivalent performance to nine sets of 20HP scroll-type ultra-low temperature air source heat pumps, greatly simplifying system configuration for large heating projects.
No dedicated equipment room required for installation. When covering the same heating area, this screw heat pump cuts floor occupation by 50% compared with conventional scroll air source heat pump systems, saving valuable construction space.
Capable of supplying high-temperature hot water up to 85°C. Even under extreme ambient temperature as low as -35°C, the unit still stably outputs hot water at 60°C to meet constant heating demands in frigid zones.
Adopts high-efficiency low-noise axial fans. Under identical operating conditions, the overall running noise is reduced by 4–6 dB for quieter commercial and industrial operation.
![Air source screw heat pump chiller]( "Air source screw heat pump chiller")
Working Principle
When the air-cooled water chiller is working, the refrigerant absorbs the heat from the cooled object in the evaporator and vaporizes. The compressor continuously draws the gas generated in the evaporator and compresses it into high-temperature and high-pressure vapor. The refrigerant vapor is then sent to the condenser to exchange heat with the air. After releasing heat, it condenses into liquid. The liquid refrigerant is decompressed after passing through the expansion valve. Then it enters the evaporator to absorb the heat of the cooled object and vaporizes again. This heat exchange process is repeated until the industrial water is cooled to the required temperature.
About us
GRAD sales network covers over 100 countries and regions like America, Australia Indonesia, Malaysia, UAE, Thailand, Nigeria etc and has established branch company in USA, and set up offices in Cambodia and Thailand to make overall layout of global market.
Manufacturer:Shandong GRAD Group Co.,Ltd.
Established Time:1993
Covers an area of:700,000sqm
Main products:Central air conditioners,ventilators ,GRP Composite material products,Environment protection products
Employment : 2500+ employees
Registered capital: ￥ 100 million
Equipment price : ￥370 million
Total capital :￥ 925 million
Annual output value: ￥over 3 billion
Design team:300+
Overseas offices:
1. Thailand and Cambodia offices
2. USA branch company
