Abstract: Refrigerator odor is a key issue affecting user experience and food preservation. To address the inadequacy of traditional methods in real-world scenarios, aimed to empirically compare the actual efficacy, user experience, and safety of three deodorization technologies: compound bio-enzymes, activated carbon, and ozone generators. Seventy-five households were recruited and randomly assigned to three groups for a four-week field test. Data were collected via odor intensity scales, user satisfaction, and safety questionnaires. Results showed that the compound bio-enzyme group achieved an 81% reduction in odor score, the ozone generator group 72%, both significantly outperforming the activated carbon group (39%). The bio-enzyme group led comprehensively in satisfaction (4.5/5.0), perceived safety (4.8/5.0), and convenience (4.9/5.0). While the ozone generator was effective, it received lower ratings for safety and convenience (2.9/5.0). It is concluded that compound bio-enzymes offer a safe, efficient, and imperceptible solution for daily use, whereas ozone generators are more suitable for rapid emergency treatment, and activated carbon technology shows limited effectiveness. Provides direct user-experience-based evidence and selection criteria for optimizing deodorization functions in the home appliance industry.

Key words: Complex biological enzyme, Unpleasant smell from the refrigerator, User experience research, Sensory evaluation