A deep dive into the relevant standards for vacuum cleaner filter efficiency test benches and a review of-known companies in the vacuum cleaner industry. I. Vacuum Cleaner Filter Efficiency Test Bench and Core Standards The vacuum cleaner filter efficiency test bench is a device for assessing the performance of a vacuum cleaner's filtration system. Its main purpose is to measure the ability of a vacuum cleaner to prevent the leakage of tiny dust particles into the environment during operation. This is crucial for evaluating the secondary dust emission phenomenon, allergen containment capability, and compliance with health and environmental standards. Core Test Standards The following are the internationally, nationally, and industrially recognized standards closely related to this test bench: IEC 60312-1: "Household cleaners - Methods of testing performance" Status: This is a foundational standard established by the International Electrotechnical Commission and widely adopted globally. Many countries and regions have based on or equivalent to this standard. Related tests: The standard specifies several performance test methods for vacuum cleaners, including the dust emission test. This test evaluates the filtration by measuring the concentration of dust in the vacuum cleaner's exhaust port. IEC 62885-1: "Surface cleaning equipment - Part 1 Domestic dry vacuum cleaners - Methods of testing" Status: This is a newer international standard that is gradually replacing and integrating some parts of IEC 60312 has become the main reference for current industry research and certification. Related tests: It more systematically specifies the test methods for filtration efficiency, usually requiring the use of a laser particle to simultaneously measure the number of particles within a specific size range (e.g., 0.3μm - 10μm) at the inlet (upstream and outlet (downstream) of the vacuum cleaner, thus precisely calculating the filtration efficiency. GB/T 20291.1-2014Household vacuum cleaners - Part 1: Dry vacuum cleaners - Methods of testing performance" Status: Chinese national standard, technically equivalent to IEC 6031-1. Products sold in the Chinese market must meet this standard for performance testing. Content: It also includes the test methods for dust emission (filtration efficiency). ASTM F1977/F1977M: "Test method for determining the efficiency of capturing particles from air exhausted from household vacuum cleaners" : An American Society for Testing and Materials standard that holds significant influence in the North American market. Features: This method focuses on assessing the overall capture efficiency of the vacuum cleaner specific test dust in the air, rather than just the efficiency of the filter material. Key Components of the Test Bench A typical filter efficiency test bench usually includes Test chamber/sealed enclosure: Provides a stable, undisturbed environment for testing. Standard test dust: Such as the IEC-specified Road Dust, which has a standardized particle size distribution. Dust dispersion device: Introduces the test dust into the vacuum cleaner evenly and reproducibly. aser particle counter: The core measuring device that monitors the particle concentration and size distribution upstream and downstream in real-time. Control system and software: Automate the test process collect data, and calculate filtration efficiency and generate reports. II. Well-Known Companies in the Vacuum Cleaner Industry The vacuum cleaner industry is crowded with and highly competitive, and can be categorized based on market positioning and technology routes.

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