How QBH Developed a Custom Visual Evaporator Cleaning Gun for 3M

Customer Background

3M has long been involved in automotive maintenance and air conditioning cleaning solutions for professional workshops and service centers.
As vehicle owners became increasingly concerned about cabin air quality, odor control, and evaporator contamination, service providers needed more reliable cleaning equipment capable of improving cleaning consistency inside automotive HVAC systems.

Traditional evaporator cleaning methods relied mainly on blind spraying through long tubes without direct internal visibility.
Although these methods were widely used in the automotive aftermarket, technicians often found it difficult to confirm spray coverage, contamination removal, and sanitization effectiveness inside the evaporator core.

To improve cleaning accuracy and create a more professional service process, the customer started evaluating a visual evaporator cleaning solution integrating both spray cleaning and real-time inspection capability.

Main Challenges Before the Project

• Limited visibility during evaporator cleaning operations inside narrow HVAC systems.
• Difficulty confirming whether cleaning chemicals fully covered contaminated areas.
• Inconsistent cleaning results caused by operator experience differences.
• Traditional high-pressure cleaning methods created concerns about evaporator fin damage and overspray control.
• Service centers wanted a more professional and demonstrable cleaning process for end customers.

QBH Visual HVAC Cleaning Solution

QBH developed the AV7828 visual evaporator cleaning gun specifically for automotive HVAC evaporator cleaning and sanitization applications.

The system integrated:

• HD inspection camera module
• Real-time display screen
• Flexible insertion tube
• LED illumination system
• Precision chemical spray channel
• Optimized pressure control structure

By combining visual inspection and cleaning into a single workflow, technicians were able to inspect evaporator contamination while simultaneously applying cleaning chemicals with improved control and positioning accuracy.

The project also focused heavily on long-term durability under automotive workshop conditions, including humidity exposure, chemical resistance, and repeated insertion inside HVAC ducts.

OEM Customization Support

In addition to hardware development, QBH provided complete OEM customization support for the project.

Project Implementation Process

1. Initial Inquiry
   Technical discussions focused on evaporator cleaning workflow, spray direction, and inspection visibility requirements.
2. Evaluación de muestras
   Prototype units were tested for image clarity, spray consistency, insertion flexibility, and chemical compatibility.
3. Structure Optimization
   QBH engineers optimized the spray pressure structure to improve cleaning coverage while maintaining operational safety.
4. Appearance Confirmation
   Housing color, logo placement, and packaging layout were finalized before mass production.
5. Production Scheduling
   The first 1000-unit production schedule was arranged according to shipment timing requirements.
6. Control de calidad
   Each unit underwent functional inspection including camera display testing and spray operation verification.
7. Shipment Arrangement
   QBH coordinated export packaging and delivery scheduling for bulk shipment preparation.

Project Results

The AV7828 visual evaporator cleaning gun helped improve the overall cleaning workflow for automotive HVAC maintenance applications.

• Improved visibility during evaporator cleaning procedures.
• Better technician control over spray positioning and chemical application.
• More professional presentation for automotive service operations.
• Stable OEM production support for bulk distribution.
• Consistent appearance and packaging quality across mass production batches.
• Established a long-term foundation for repeat-order cooperation.

Why This Project Matters for Automotive Tool Distributors

As automotive workshops place greater emphasis on cabin air quality and HVAC system maintenance, visual cleaning equipment is becoming increasingly important in professional service environments.

For distributors and automotive tool brands, stable OEM manufacturing capability is no longer limited to hardware production alone.
Buyers increasingly require:

• Stable mass production consistency
• Reliable packaging quality
• Professional product presentation
• Fast engineering communication
• Long-term supply stability
• Flexible OEM customization support

The AV7828 project demonstrates how QBH supports automotive brands with both product development and scalable manufacturing coordination for specialized automotive HVAC cleaning equipment.