NEWBASE Launches 6th Gen All-DC Inverter Heat Pump AC for Electric Buses

Introduction

As the global transition to new energy vehicles accelerates, the demand for high-efficiency, intelligent thermal management systems in commercial transportation has never been greater. At NEWBASE (Zhengzhou Newbase Auto Electronics Co., Ltd), we are committed to pushing the boundaries of automotive HVAC technology. Our latest generation of Full DC Inverter Heat Pump Air Conditioners represents a significant leap forward, specifically engineered for the unique challenges of 6-12 meter electric buses, hybrid buses, and fuel cell buses.

In this article, we delve into the technical innovations behind our NBEAC Series, exploring how we achieve a 30% reduction in energy consumption and a 20% reduction in weight compared to conventional systems.

The foundation of our superior performance lies in the All-DC Inverter Technology. Unlike traditional AC systems, our compressors operate on DC power with variable frequency control. This allows for:

• Soft Start and Smooth Operation: Eliminating the high-current impact during startup, which protects the vehicle's power system.
• Precise Temperature Control: Utilizing PWM (Pulse Width Modulation) stepless speed regulation coupled with electronic expansion valves, our system maintains a constant temperature with minimal fluctuation, ensuring passenger comfort while maximizing energy savings.

Our Heat Pump System is designed to operate efficiently in a wide range of climates. Whether cooling at 18KW to 32KW or heating at 20KW to 38KW, the system uses environmentally friendly refrigerants (R407C/R410A) to provide reliable cabin comfort.

One of the most critical challenges in electric mobility is managing the thermal load of both the cabin and the battery. NEWBASE leads the industry with our Compact Integration and Comprehensive System Integration solutions.

• Dual-Purpose Efficiency: Our integrated units (models NBEAC-21-T to 34-T) simultaneously manage cabin air conditioning and battery thermal management (liquid cooling/heating).
• Solving the "Cold Winter" Problem: By integrating the circuits, we solve the common issue of insufficient heating capacity in low temperatures. The system can recover heat to warm the cabin while cooling the battery during charging, achieving a remarkable 30% energy saving in environments as cold as -10℃.
• Intelligent Distribution: Using multi-channel electronic expansion valves and smart PID control, the system dynamically allocates refrigerant flow based on real-time demands from the cabin and the battery side.

Energy efficiency is not just a metric; it is the core value of our design. Here is how we achieve an industry-leading Energy Efficiency Ratio (EER):

• Low-Temperature Air Injection (Flash Gas Injection): This technology enhances the enthalpy of the refrigerant, significantly boosting heating capacity and efficiency when temperatures drop.
• Optimized Airflow Design: Through extensive CAE/CFD (Computer-Aided Engineering/Computational Fluid Dynamics) simulations, we have optimized the V-type shock absorption structure and blade design. This reduces noise and increases airflow volume (Evaporator airflow ranges from 3200 to 7200 M³/h).
• Fuzzy Energy-Saving Control: The system intelligently unloads or adjusts the speed of energy-consuming components based on operating conditions, ensuring you only use the power you need.

Weight reduction directly translates to extended driving range for electric buses. We have achieved a 30% weight reduction compared to similar products through:

• Advanced Materials: Utilizing lightweight composite materials such as SMC (Sheet Molding Compound) and LFT-D (Long Fiber Reinforced Thermoplastics) for the housing.
• Structural Optimization: Localized framing treatment of components like the condenser further reduces weight without compromising strength.
• IP67 Protection: Every electrical component, including the compressor and waterproof connectors, meets the IP67 standard. This means our units are completely dustproof and can withstand temporary immersion in water, meeting strict automotive-grade requirements.

Our modular design allows us to serve a wide range of bus sizes. Below is an overview of our standard platform models:

Note: "-T" models indicate integrated battery thermal management capability.

Safety is paramount in high-voltage environments. Our units feature:

• 360° Shielding & Equipotential Connection: Protecting sensitive electronics from the complex electromagnetic environment of new energy vehicles.
• Comprehensive Protection Circuits: Including high-voltage pre-charge circuits, IGBT modules for PTC control, and DC-DC conversion with over-voltage/short-circuit protection.

NEWBASE is not just a manufacturer; we are a leader in new energy electronic control and commercial vehicle thermal management. By focusing on integration, intelligence, and lightweight design, we are helping global partners build a more sustainable and comfortable future for public transportation.

Ready to upgrade your fleet's thermal management system? Contact NEWBASE today to learn more about our OEM capabilities and how our heat pump technology can reduce your operational costs.