| Closed-type sprinkler heads are crucial components of automatic fire sprinkler systems, and whether their temperature-sensitive elements activate within the static activation temperature range determines the effectiveness of initial fire control. During interior building decoration, it is quite common for the surfaces of closed-type sprinkler heads to be coated with decorative paint. Therefore, studying the types of decorative paint adhered to closed-type sprinkler heads and the extent of adhesion's impact on the static activation temperature range of their temperature-sensitive elements is an important measure to prevent the failure of automatic fire sprinkler systems. This paper employs an experimental research method, taking common closed-type sprinkler heads as the study subjects, by spraying different colors (black, red, white) and varying thicknesses of architectural paint on their surfaces to construct multiple sets of comparative samples, thereby testing and analyzing the influence patterns of paint parameter changes on the static activation temperature range of the sprinkler heads. The results indicate that decorative coatings have a significant interference effect on the static operating temperature of closed sprinkler heads, with the impact of coating color being particularly notable. The specific degree of influence is manifested as highest for black coatings, followed by red coatings, and lowest for white coatings. The research findings clarify the mechanism by which decorative coatings affect the thermal response performance of closed sprinkler heads, providing experimental data support for standardizing decoration construction and fire safety regulation. |
