- EN
I. Temperature Fluctuations
User feedback: Unstable room temperature, discomfort
Traditional fixed-speed compressors start and stop frequently, causing temperature swings.
VZH Solution
Full DC inverter technology with 25-100Hz wide frequency range (VZH088). Continuous capacity modulation eliminates start-stop cycles, achieving ±0.3°C temperature control accuracy.
II. High Electricity Bills
User feedback: Energy costs too high, especially during part-load conditions
Systems run under partial load >80% of the time. Traditional compressors lose efficiency, increasing electricity expenses.
VZH Solution
Permanent magnet motors: Stable efficiency >92%
Intermediate Discharge Valve (4-11TR): Reduces over-compression losses
Dual pressure ratios (13-26TR): High/low ratio options for air/water-cooled applications
III. Noise Disturbance
User feedback: Loud start-up noise, especially at night
Frequent start-stops generate impact noise, disturbing sensitive environments.
VZH Solution
Continuous operation eliminates start-stop noise
Optimized scroll design ensures stable sound quality
Pre-matched compressor and drive packages for smooth operation
Technical Specifications
| Series | Capacity | Frequency | Key Features |
|---|---|---|---|
| Small | 4-11 TR | 25-100 Hz | IDV + PM Motor |
| Large | 13-26 TR | Variable | Dual PR + PM Motor |
Conclusion
The technical value of Danfoss VZH series translates into end-user experiences: stable temperatures, controllable energy costs, quiet environments. This is what distinguishes professional HVAC systems from ordinary equipment.
