For northern heating systems, winter's severe cold is the ultimate test of equipment. When outdoor temperatures drop below freezing, conventional heat pumps face issues such as heating capacity degradation, soaring energy consumption, and even system shutdown. The "Thermal Core" series from GMCC is designed precisely to address this pain point.
It should be noted that "Thermal Core" is not a specific model number, but rather a technology brand registered by GMCC for its low-temperature vapor-injected enthalpy heat pump heating compressor product line, representing a comprehensive set of mature ultra-low-temperature heating solutions.
Conventional heat pumps operate with excessively low evaporation pressure in low-temperature environments, leading to increased suction specific volume, reduced refrigerant mass flow rate, and sharp decline in heating capacity. This is a long-standing physical bottleneck in the industry.
Through EVI (Enhanced Vapor Injection) technology and high-efficiency electromagnetic structure optimization, the Thermal Core series achieves stable 65°C high-temperature water output in -25°C ultra-low temperature environments. This performance means that even in frigid regions, heat pumps can independently meet indoor heating and domestic hot water demands without relying on high-energy-consumption electric auxiliary heating or gas boilers, significantly reducing winter operating costs.
The technical value of Thermal Core is ultimately reflected in specific product models. This series includes mainstream models suited for different scenarios:
Rotary Compressor Series (EDT/EDP Series)
This is a common type within the Thermal Core series, featuring R290 environmentally friendly refrigerant and DC inverter vertical compressor design, specifically engineered for heat pump heating applications. Representative models include:
| Model | Displacement | Heating Capacity | Application Scenario |
|---|---|---|---|
| EDPM310D85EMT | 30.6cm³/rev | 6800W | Small-scale heating projects |
| EDPQ580D2ENT | 58cm³/rev | 13000W (approx. 5HP class) | Features vapor injection technology |
| EDTQ750D66ENT | 75cm³/rev | 16950W | Medium-scale heating projects |
Scroll Compressor Series (SED Series)
Suitable for higher-power heat pump heating applications:
SEDVE135D11TLG: R290 refrigerant, 135cm³/rev displacement, stable operation at -35°C, water output up to 75°C
SEDGA042D series: covers 42cm³/rev displacement range
Taking the 5HP-class representative product released in 2019 as an example, the core technologies of the Thermal Core series include:
Core Technology 1: Check Valve Injection Solution
This series employs GMCC's independently developed check valve injection structure, optimizing the EVI system's injection volume at mid-to-low frequencies, ensuring high discharge volume and heating capacity even at low evaporation temperatures, achieving a compression ratio as high as 16.3.
Core Technology 2: 18-Slot 6-Pole Motor
By increasing the motor winding coefficient by 8%, motor efficiency is significantly improved, achieving a 3.2% energy efficiency gain over the previous generation platform.
Continuous Vapor Injection Technology (EVI)
GMCC's proprietary technology incorporates check valves within the cylinders, enabling independent vapor injection for upper and lower cylinders to achieve 360-degree injection effect. Even in -35°C to -45°C ultra-low temperature environments, it delivers robust heating capacity with a 10% improvement in Coefficient of Performance (COP).
The technological evolution of the Thermal Core series continues. GMCC's next-generation products launched in 2025-2026 (covering the 5-20HP capacity range) adopt the 15-slot 10-pole motor platform and ultra-wide-frequency noise reduction technology:
Operating lower limit extended to -45°C ultra-low temperature environment
Overall noise reduction of 3-5 decibels
Supports 6-140Hz ultra-wide frequency operation
This further expands the applicable boundaries of heat pumps in extremely cold regions, providing more reliable options for clean heating in high-latitude or high-altitude areas.
Choosing the GMCC Thermal Core series is essentially choosing a low-temperature heating technology solution that has been market-validated and continues to evolve. From the rotary EDT/EDP series (under 5HP, small to medium power) to the scroll SED series (higher power scenarios), GMCC offers a complete product portfolio covering fixed-speed and inverter models, compatible with different equipment types such as fan heaters and water heaters. It is not just a marketing concept, but an engineering capability embodied in specific models, ensuring stable and efficient heating system operation under the harshest weather conditions.
