With over a decade of specialized development and mass production of miniature DC fluid pumps, Dongguan Haimi has become a reliable component supplier for global HVAC manufacturers and central air conditioning complete-set factories. Our customized micro circulation pumps are widely equipped in household duct air conditioners, modular central air units, heat pump air conditioners and commercial building HVAC auxiliary water circulation systems, focusing on condensate drainage, cold/hot water auxiliary boosting and internal equipment small-loop cooling.
Central air conditioning auxiliary water circuit runs long-term uninterrupted indoors, with circulating medium ranging from clean water to weakly acidic condensate within PH5~PH10, putting strict demands on pump constant operation, corrosion resistance and low noise performance. Our flagship HM6002-1 three-phase DC water pump is the mainstream matching model for HVAC auxiliary circulation, covering 12VDC~48VDC wide working voltage, rated power 12~80W, flow rate 10~30L/min and maximum allowable liquid temperature up to 75℃. Built-in overvoltage, overcurrent, dry-run and locked-rotor protection plus optional 0-5V & PWM speed control with FG signal feedback, it flexibly adjusts circulation flow according to air conditioner real-time load change. Rated continuous working life exceeds 20000 hours under standard operating conditions, effectively reducing after-sales failure rate of central air conditioning units. IP68 waterproof grade plus arbitrarily adjustable outlet direction greatly simplifies compact internal pipeline layout inside air conditioner cabinets.
For centralized commercial HVAC projects needing independent condensed water collection and micro gas emptying inside pipeline, project designers often adopt our supporting diaphragm pump to realize dual functions of drainage and pipeline exhaust, cooperating with main circulation pumps to optimize overall water circuit stability of large central air systems. When installing outdoor split heat pump central air in off-grid scenic areas and remote buildings without mains power, customers can configure our solar DC water pump, driven by solar panels to complete passive water circulation for air-conditioning auxiliary loop.
May 04, 2026
