Inverter Air Source Heat Pump

Real EVI Vapor Injection Circuit: Integrates an external brazed plate heat exchanger as an economizer. Sub-cools liquid refrigerant while injecting superheated vapor into the scroll compression chamber, protecting the compressor discharge temperature and preserving full heating output at -7°C.

Full DC Inverter Drive Architecture: Combines a variable-speed inverter compressor, brushless DC fan motor, and an electronic expansion valve (EEV) with 500-step precise flow regulation to match real-time thermal load fluctuations within plus/minus 0.5°C.

Acoustic Suppression Assembly: Double-isolation compressor mounting rubber pads, encapsulated inverter compressor sound-blanket, and CFD-optimized skewed fan blades reduce mechanical vibration and noise emissions below German TRVB residential sound limits.

Smart Grid & Photovoltaic Integration: Standard hardware inputs for SG-Ready (Smart Grid) and PV-Ready contacts, allowing automated load-shifting to consume self-generated solar power or utilize off-peak utility tariffs.

The system utilizes a closed-loop vapor-compression refrigeration cycle optimized for cold-climate hydronic applications:

EVI Injection Process: In sub-zero ambient conditions, standard heat pumps suffer from mass flow starvation. The intermediate-pressure injection port feeds compressed vapor directly into the middle of the scroll compression pocket, boosting refrigerant mass flow and lifting condensing enthalpy without overheating the motor windings.

Dynamic Defrosting Logic: Eliminates energy-wasting timed defrost cycles. Dual electronic sensors monitor evaporating coil temperature and ambient relative humidity, initiating reverse-cycle defrost only when frost buildup restricts air passage. Total defrost duration is kept under 4 minutes, minimizing indoor water temperature fluctuation.

Underfloor Heating & Fan Coils: Low-temperature water supply (35°C to 41°C) maximizes structural thermal mass efficiency.

Radiator Boiler Replacement: High output temperature capability (65°C for R32; 75°C for R290) permits direct retrofitting into existing cast-iron or steel panel radiator circuits without changing terminal units.

Domestic Hot Water (DHW) Production: Integrates with 3-way diverting valves to supply external DHW tanks, executing weekly Legionella thermal disinfection cycles up to 70°C.

Multi-Unit Cascading: Up to 6 units are managed via master-slave controller architecture to balance operating hours and deliver staged capacity up to 160kW for light commercial buildings.

To reduce installation overhead for mechanical contractors, we supply factory-matched hydraulic kits:

Wall-Mounted Indoor Hydrobox: Houses a Grundfos/Wilo high-efficiency PWM circulation pump, an 8L expansion vessel, an automatic air vent, a pressure relief valve, and a staged electric backup heater (3kW / 6kW).

Buffer & DHW Tank Layouts: Factory-vetted piping schematics for dual-buffer configurations (ensuring adequate defrost volume and hydraulic decoupling).

Cascade Control Panel: Centralized touchscreen interface managing weather-compensated heating curves (outdoor reset control) across multi-unit commercial arrays.

We act as a direct manufacturing partner for international HVAC brands, offering deep customization without compromising core performance:

Hardware Adaptation:Custom sheet metal gauge, structural dimensions, and RAL color finishes.C5-M marine-grade anti-corrosion powder coating and blue-fin/gold-fin anti-corrosive evaporator coatings for coastal or high-pollution environments.

Software & UI Integration:Embedded OEM brand logos on controller start-up screens and physical enclosures.Localized language interface packages and private-cloud server API integration for proprietary distributor monitoring platforms.

Component Tier Customization:Compressor options: Copeland, Panasonic, or Mitsubishi Electric.Electronic controller platforms (Carel, PGD, or custom MCU architecture).

Manufacturing standards are enforced through strict on-line testing gates and third-party laboratory accreditations:

Factory Testing Protocols:

100% Helium Mass Spectrometer Leak Test on all refrigerant circuits to guarantee annual leakage rates below 2g/year.

Automated Electrical Safety Verification: Dielectric high-voltage withstand, earth continuity, and insulation resistance testing on every unit.

4-Hour Computerized Run-Test: Each unit is hot-tested on a dedicated dynamometer water-loop test bench simulating working loads and pressures.

Material Traceability: Incoming component inspection of copper tube wall thickness, sheet steel galvanization grade, and electronic board conformal coating.

International Certifications:

CE-LVD & CE-EMC directives compliance.

ErP Energy Label: A+++ and A++ certificates issued by TÜV Rheinland / SGS.

Keymark & MCS technical documentation packages available for European subsidy alignment.

RoHS & REACH environmental compliance statements.

To obtain detailed performance data sheets, step-down capacity curves, or discuss OEM/ODM manufacturing terms, please complete your project details below:

Inquiry Nature: [ ] Bulk Wholesale [ ] Engineering Tender Project [ ] OEM/ODM Customization [ ] Sample Evaluation Unit

Target Installation Region / Country:

Required Heating Capacity (kW):

Preferred Refrigerant: [ ] R32 [ ] R290

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