Product Overview & Application
JUHUO manufactures custom injection-molded plastic enclosures designed to house electronic control boards inside residential and commercial air conditioning units. These housings isolate low-voltage and high-voltage sections, manage internal cable routing, and protect circuit boards from ambient humidity and mechanical shock during HVAC assembly.
Engineering Materials & Mechanical Properties
Housing integrity depends on selecting engineering thermoplastics matched to the thermal and mechanical loads of the HVAC unit interior.
Standard ABS (Acrylonitrile Butadiene Styrene)
• Application: Standard indoor wall-split and window-unit controller covers.
• Properties: Provides stable shrinkage rates (0.4% to 0.7%), high surface rigidity, and stable impact resistance under standard operating temperatures (0°C to 60°C).
PC+ABS Alloy
• Application: High-vibration zones, commercial inverter modules, or outdoor units near compressor compartments.
• Properties: Offers enhanced tensile strength, elevated heat deflection temperatures, and greater resistance to structural creep under continuous fastener torque.
Flame-Retardant Grades
Available in UL94 V-0 or V-2 rated formulations for compliance with electrical safety standards in specific regional markets.
Precision Tooling & Injection Molding Parameters
Tooling design directly dictates the dimensional accuracy of snap-fits, screw bosses, and slide-action cable cutouts.
Dimensional Tolerances
Mold cavities are machined to strict tolerances (± 0.05 mm on critical mounting hole centerlines) to prevent board warpage or misalignment during automated PCB insertion.
Draft Angles & Wall Thickness
Main walls maintain a uniform thickness (2.0 mm to 3.0 mm) with internal reinforcement ribs to prevent sink marks. Draft angles are maintained between 0.5° and 1.0° to facilitate smooth part ejection.
Gate Placement
Sub-gate or edge-gate locations are engineered away from visible exterior faces to eliminate cosmetic blemishes on exposed housing surfaces.
Quality Control, Inspection & Compliance Protocol
Manufacturing consistency is verified through systematic inspection checkpoints and adherence to international regulatory frameworks:
First Article Inspection (FAI): Initial samples from new tooling runs are measured using coordinate measuring machines (CMM) to verify hole pitch, wall thickness, and peripheral dimensions against 3D CAD data.
Process Monitoring: Injection parameters (barrel temperature profiles, packing pressure, cooling time, and cycle duration) are logged automatically to maintain batch-to-batch repeatability.
Functional Fit Testing: Molded covers undergo mechanical drop-in tests with actual PCB samples to confirm zero interference with mounted relays, capacitors, and terminal blocks.
Regulatory Compliance: All production grades fully comply with ISO 9001 quality management standards, along with RoHS and REACH environmental directives for global market access.
Technical Specifications
|
Parameter |
Specification |
|
Product Type |
Air Conditioner PCB Housing / Control Board Cover |
|
Manufacturing Method |
High-Pressure Plastic Injection Molding |
|
Material Options |
ABS, PC+ABS, Flame-Retardant Engineering Resins |
|
Dimensional Tolerance |
Standard ISO 2768-m (Precision features down to ± 0.05 mm) |
|
Surface Finish |
VDI 3400 texture, SPI mirror finish, or matte standard |
|
Quality & Compliance |
ISO 9001, RoHS, and REACH compliant |
|
Customization |
OEM/ODM based on STEP/IGES 3D files or physical samples |
FAQ
Q: What is the function of an air conditioner PCB cover?
A: The PCB cover protects the electronic control board inside an air conditioner from dust, accidental contact, mechanical damage, and environmental influence. It also helps maintain stable PCB positioning during assembly.
Q: Can you manufacture PCB covers according to our existing design?
A: Yes. We provide OEM manufacturing based on customer drawings, 3D files, samples, or PCB assembly requirements. Our engineers can optimize the structure for injection molding and mass production.
Q: What materials can be used for air conditioner PCB covers?
A: Common materials include ABS and PC+ABS. ABS is widely used because of its good molding performance and cost efficiency, while PC+ABS provides higher impact resistance and improved mechanical performance. Material selection depends on your specific application requirements.
Q: How do you ensure PCB cover quality during production?
A: We control quality through incoming material inspection, mold verification, real-time production monitoring, and final inspection. Critical points such as dimensions, assembly fit, and appearance are rigorously checked before shipment.
Q: What is the typical production volume you support?
A: We support both prototype orders and large-volume OEM production. Production capacity can be flexibly adjusted according to customer demand and project timelines.
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