QK Series: Small Displacement Household Air Conditioning Segment
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High Efficiency: COP maintained at 3.05–3.14 W/W, EER approximately 10.4–10.7 Btu/W·h, demonstrating outstanding energy efficiency among small fixed-speed compressors.
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Low Vibration & Low Noise: The rotary structure inherently provides continuous and smooth compression, making it suitable for noise-sensitive environments such as bedrooms and living rooms.
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High Reliability: Simple and robust construction (cylinder + bearing + crankshaft + roller + vane), fewer mechanical parts, low failure rate.
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Compact and Lightweight: Compact dimensions and light weight facilitate easy integration into small-sized units by OEMs.
QJ Series: Mainstream Mid-Capacity Range
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Leading Energy Efficiency in Select Models: The QJ208P in the QJ series achieves a COP as high as 3.33 W/W and an EER of 11.35 Btu/W·h, representing a top-tier level among non-inverter rotary compressors.
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Tropical Reliable Design: Reinforced for high-temperature and high-humidity environments, ensuring stable operation under wide voltage conditions.
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High Torque Motor + High-Performance Mechanical Structure: Ensures reliable startup even at 80% of rated voltage without the need for a start capacitor.
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Low Noise Operation: No valves, no reciprocating piston motion, resulting in minimal gas pulsation and mechanical vibration.
Wide Application Scenarios: Compatible with air conditioners, clothes dryers, RV air conditioners, dehumidifiers, and various other refrigeration equipment.
Q1: Sudden shutdown during operation, then restarts after a while?
A: This is usually caused by the activation of the thermal overload protector. Common triggers: ① Blocked or heavily dust-clogged condenser air inlet/outlet; ② Suction gas temperature too high due to undersized or excessively long refrigerant piping; ③ Clogged capillary tube or drier filter; ④ Unstable power supply voltage. Clearing obstructions, cleaning the condenser, and installing a voltage stabilizer are typically effective solutions.
Q2: Low unit pressure, actual cooling capacity below rated value?
A: Troubleshooting sequence: Check whether actual gas consumption exceeds output → whether the discharge valve/suction valve is faulty → whether the low-pressure valve is stuck → whether there is a leak in the user's pipeline network → whether the pressure switch/sensor setting is too low. The QJ series operates in the mid-capacity range, and improper system matching most commonly manifests as "low pressure, slow cooling."
Q3: Refrigerant leakage causing abnormal pressure?
A: Mid-capacity QJ series models are sensitive to refrigerant charge quantity. Leakage will cause abnormal compressor pressure and affect normal operation. Once abnormal pressure is detected, promptly repair the leak point and recharge with the specified amount. Never add refrigerant "by feel."
