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In modern commercial architecture, the entrance is more than just a passage for customers; it represents a major thermal link in the building envelope. High-traffic environments such as shopping malls, luxury hotels, transport hubs, and office buildings face a continuous challenge: maintaining indoor thermal comfort and indoor air quality (IAQ) while minimizing energy consumption. Every time an entrance door opens, conditioned air escapes, and untreated outdoor air, dust, pollen, and pollutants rush inside. This phenomenon, driven by wind pressure and stack effects, forces central HVAC systems to work under overload conditions, spiking utility costs and accelerating equipment wear.
To counter these thermal losses, the integration of Fresh Air Ventilators and Energy Saving Air Curtains has emerged as the industry gold standard. A fresh air ventilator ensures a controlled, continuous intake of purified outdoor air, maintaining positive building pressure. Concurrently, an energy-saving air curtain acts as an invisible aerodynamic barrier across the doorway. Together, they form a cohesive HVAC ecosystem that seals the entrance thermally without physical barriers, ensuring that conditioned air stays inside and unconditioned outdoor air is deflected.
High-velocity laminar airflow creates a continuous seal, blocking up to 90% of external drafts and heat transfer.
Reduces HVAC workload by preventing conditioned air loss, leading to a substantial decrease in seasonal energy bills.
Prevents insects, dust, exhaust fumes, and airborne allergens from entering clean commercial spaces.
The global air barrier and commercial ventilation market is shifting rapidly toward intelligence, electrification, and decarbonization. Traditional air curtains operated on simple on/off switches or single-speed motors, which consumed excessive energy and generated high noise levels. Today, the industry is witnessing the adoption of EC (Electronically Commutated) motors and integrated IoT controllers. These modern systems dynamically adjust the air velocity and angle based on real-time wind speed, temperature differentials, and door opening frequency. By pairing air curtains with energy recovery ventilators (ERVs), buildings can recapture up to 85% of sensible and latent heat from exhaust air, optimizing the fresh air preheating or precooling process.
Maintain a constant temperature for twenty years, creating a new future.
Dezhou Yuanxin Air Conditioning Equipment Co., Ltd. was established in March 2006, covering an area of 60,000 square meters. It is a comprehensive enterprise integrating the design, production, sales, and service of a series of products such as central air conditioning, ventilation equipment, CCCF fire smoke exhaust, etc. It is a member unit of the China Refrigeration Society, the vice president unit of the Central Air Conditioning Industry Alliance, a CCCF certified enterprise for fire protection products by the Ministry of Public Security, and a China HVAC production base.
In terms of equipment level, development space, and overall strength, the company has strong development potential. It has now obtained ISO9001, ISO14001, and OHSAS18001 (quality, environment, occupational health) three system certifications, obtained the national industrial product production license for fan coil units and air curtain machines, obtained the CCCF certification for fire protection products issued by the Ministry of Public Security's Fire Product Qualified Evaluation Center, and has national inspection reports for various series of main products, safety production standardization and other series of qualifications.
Retail entrances present a unique HVAC challenge. They feature large glass facades and sliding or revolving doors that operate constantly. The ingress of outdoor air not only disrupts the indoor temperature but also creates drafts near checkout areas, affecting employee comfort. Installing high-efficiency, centrifugal air curtains above retail doors creates a vertical air barrier that keeps conditioned air locked inside. When paired with ceiling-mounted fresh air ventilators, the system balances indoor air pressure, ensuring that doors open smoothly without creating a vacuum effect, while maintaining a comfortable, draft-free shopping environment.
In hospitality, guest comfort and aesthetics are paramount. Large lobbies with high ceilings suffer from the "stack effect," where warm air rises and draws cold drafts through ground-floor entrances. Standard surface-mounted air curtains can disrupt architectural designs and create excessive noise. The solution lies in recessed or ceiling-concealed air curtains integrated with luxury four-sided air outlets. These systems deliver silent, low-velocity air barriers that blend seamlessly into the ceiling architecture, maintaining lobby temperatures and preventing street noise, exhaust fumes, and odors from entering the guest reception areas.
For cold storage and logistics warehouses, temperature control is critical to product quality. Loading bays and freezer doors experience extreme temperature differences (often exceeding 40°C). When doors open, warm, humid air enters, leading to frost accumulation on evaporators, slippery floors, and increased energy consumption. Heavy-duty industrial air curtains, combined with specialized fresh air ventilation systems, create a powerful thermal barrier. This prevents humidity ingress, eliminates safety hazards like ice buildup, and maintains a stable internal environment, protecting perishable goods while reducing compressor runtime.
Hospitals and laboratories require strict environmental controls to prevent cross-contamination. Vestibules and cleanroom entrances use air curtains to maintain positive pressure zones. When combined with HEPA-filtered fresh air ventilators, these systems create a sterile air barrier that prevents airborne pathogens, dust particles, and contaminants from migrating between different clean zones, ensuring patient safety and compliance with strict health regulations.
The performance of an air curtain is directly tied to the building's internal pressure. If a building is under negative pressure, outdoor air will be sucked in through the bottom of the doorway, rendering the air curtain less effective. By integrating a fresh air ventilator, HVAC engineers can introduce conditioned outdoor air to create a slight positive pressure inside the building. This positive pressure naturally pushes air outward, working in harmony with the downward velocity of the air curtain to create a highly efficient thermal seal.
The company mainly operates: air conditioning purification units, fresh air and ventilation machines, cartridge fan coil units, exposed fan coil units, ultra-thin wall-mounted units, water temperature air conditioners, air curtains, warm air heaters, CCCF axial flow fire smoke exhaust fans, centrifugal fire smoke exhaust fans, tunnel fans, subway fans, side wall fans, fire dampers, smoke exhaust valves (smoke exhaust outlets), smoke exhaust fire dampers, and various fans, air outlets, mufflers, common plate flange ducts, and other varieties.
