Indoor BLDC Cross-Flow Blower Motor

-- Steady & Reliable Manufacturer --

The Imperative: Delivering Silent, Precisely Controlled Airflow for Optimal Energy Performance in Residential Units

The Indoor BLDC Cross-Flow Blower Motor is the cornerstone of modern, high-efficiency ductless HVAC systems (Mini-Splits) and premium air handlers. Utilizing Brushless DC (BLDC) technology, this motor is specifically designed to drive the long, cylindrical cross-flow impeller within indoor units. The primary benefits are ultra-quiet operation, stepless variable speed control, and superior energy efficiency compared to older PSC (Permanent Split Capacitor) AC counterparts. Our motors ensure that the indoor unit provides comfortable, laminar airflow while maximizing the overall system's Seasonal Energy Efficiency Ratio (SEER).

Acoustic performance is critical for any indoor motor, and our BLDC motors excel by employing sophisticated Field-Oriented Control (FOC) algorithms that eliminate the low-frequency humming and cogging torque common in basic BLDC or AC designs. The precise control allows for incredibly slow "silent mode" operation while still generating sufficient airflow for temperature sensing. Furthermore, the variable speed capability means the compressor (outdoor unit) can modulate its output to match the thermal load exactly, a functionality entirely dependent on the indoor fan motor's ability to precisely regulate airflow volume across the evaporator coil.

Our motors are engineered for tight integration within the slim, low-profile designs of modern air conditioners. We provide custom solutions for shaft lengths and mounting brackets to perfectly match various impeller sizes and unit designs. The motor and its integrated electronic controller are highly resilient to the moist, condensation-prone environment of the evaporator coil, utilizing specialized protective coatings on the PCB and moisture-resistant insulation. This focus on reliability in a challenging thermal environment ensures a long, maintenance-free operational lifespan, crucial for consumer satisfaction.

We offer advanced communication options, allowing the motor controller to interface seamlessly with the central HVAC logic via digital signals or specialized protocols. This high level of integration simplifies the manufacturing process and ensures rapid response to system load changes, optimizing overall performance. By utilizing our Indoor BLDC Cross-Flow Blower Motors, manufacturers achieve the highest levels of energy efficiency, acoustic comfort, and precision control demanded by today’s competitive HVAC market.

Key Product Strengths:

  • Ultra-Low Noise: FOC control and precise balancing eliminate humming, vital for quiet indoor spaces.
  • Stepless Speed Control: Allows infinite speed adjustments for precise thermal load matching, maximizing SEER/EER.
  • High Efficiency: BLDC technology provides superior power conversion, reducing energy consumption during continuous operation.
  • Integrated Condensate Protection: Coated electronics and insulation designed for high-humidity, evaporator-adjacent mounting.
  • Slim Design: Compact axial length to accommodate the long cross-flow impeller within a narrow housing.

To discuss the variable speed control and acoustic requirements for your next generation of indoor HVAC units, please contact our BLDC comfort specialists for technical specifications.

Key Technical Specifications

Parameter Details / Type
Motor Technology BLDC (Brushless DC), Inverter Controlled
Rated Power Range 15W - 80W
Fan Type Cross-Flow/Tangential Blower
Speed Control Stepless (Variable Speed)
Noise Level (Min) < 35 dB(A) at low speed
Control Interface PWM, Digital Signal
Focus Acoustic Comfort, Energy Rating (SEER)

Core Competitive Advantages

  • Integrated Sensor: Built-in Hall effect sensors provide high-resolution speed feedback for precise FOC control and system monitoring.
  • Moisture Resilience: Specialized epoxy encapsulation on windings and conformal coating on PCBs protect against condensate and humidity.
  • Harmonic Reduction: Low harmonic distortion during operation ensures cleaner power consumption and compliance with grid standards.
  • Rapid Speed Response: Quick acceleration/deceleration allows the motor to respond instantly to thermostat setpoint changes.

Installation & Stability Guide

  • Typical Installation: Motor mounts to the indoor unit casing, directly coupled to the cross-flow impeller. Critical Step: The motor must be secured rigidly and accurately to prevent any mechanical wobble, which is amplified by the long impeller and causes noise.
  • Scenario Optimization: Essential for minimizing the difference between the set temperature and the actual room temperature (temperature overshoot/undershoot).
  • Visual Demonstration: Detailed view of the BLDC rotor and stator with internal Hall sensors highlighted.

Applications & Target Systems

About Us
Shengzhou Tianyi Electric Appliance Co., Ltd.
Shengzhou Tianyi Electric Appliance Co., Ltd. was established in 1993 and has been professionally engaged in researching, developing and selling household electrical motors for over 30 years. Tianyi Electric Appliance is China Indoor BLDC Cross-Flow Blower Motor Manufacturers and Custom Indoor BLDC Cross-Flow Blower Motor Factory .Our company offers services covering design and development to production and assembly. We provide professional solutions to customers's motor problems.
Our factory is located in Shengzhou city which is famous for the production base of motors with complete industrial chains. The city enjoys convenient transportation: east from Ningbo about 100 kilometers, west from YiWu about 60 kilometers, north from Hangzhou about 120 kilometers.
With about 200 staff now, more than 50 personnel are of intermediate titles in management and research and development. Owning fixed assets of RMB 100 million, the factory covers an area of 25,000 square meters, with a building area of 20,000 square meters. Besides, Shengzhou Yijin Trading Co., Ltd. and Shengzhou Dinghui Trading Co., LTD are the two subsidiary companies. At present, The main products of our company include household washing machine motors, household air-conditioner motors, range hood motors, fan motors ventilator motors, etc. The annual production capacity of the factory is more than 10 million motors, and we keep a good relationship with some famous enterprises such as ZhejiangXiabao, KoreaElectric Groupp, Artel Group, SUNG HWA TECH.Co., Ltd. Kumkanggreenfan Co., Ltd., etc.
Our company has passed the ISO9001 quality management system and obtained product certifications like CCC and CE.
Shengzhou Tianyi Motor will devote itself to Research Development, and innovation, and we will try our best to provide the best products and solutions for customers with the best service.
In 2023, 12 million household motors were produced, and the total number of washing machine motors was 8 million, range hood motors 1.5 million, fan motors 1 million, ventilator motors 1 million, and on and electric motaccessoriesory half a million.
Enterprise honor
In several years of research and development, we paid our sweat to a lot of honors, which also confirmed the efforts we made When look forward, New targets and new challenges are waiting for us, and we are fully prepared!
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