It uses high-frequency oscillation (1.7MHz, exceeding the range of human hearing). Through the high-frequency resonance of the atomizing plate, water is thrown off the surface to produce naturally drifting water mist.
First, humidification capacity. This is the most important parameter of a humidifier. Some manufacturers, to cater to consumers' desire for high humidification capacity, arbitrarily inflate the advertised capacity. Therefore, the standard strictly stipulates that the humidification capacity should not be lower than the nominal value of the product's rated humidification capacity.
Second, humidification efficiency. This refers to the ratio of the actual humidification capacity of the humidifier to the input power. It reflects how much humidification can be produced per unit of power consumption and is an important indicator of humidifier performance. To guide consumers in purchasing energy-saving and environmentally friendly products and to encourage manufacturers to develop more efficient products, the standard divides this indicator into four levels: A, B, C, and D.
Third, noise. Considering that humidifiers may be used in bedrooms, excessive noise will have a certain impact on consumers. Therefore, the standard imposes strict limits on noise levels.
Fourth, evaporator core (evaporator) lifespan. For direct evaporation humidifiers, the evaporator core (evaporator) is the component that has the greatest impact on performance. As humidifiers are used continuously, the efficiency of the evaporator core (electrode) will gradually decrease, and the humidification capacity will also decline accordingly. The standard stipulates that when the humidification capacity of a humidifier decreases to 50% of its initial capacity, the evaporator core is considered to have failed. For replaceable evaporator cores (electrode), their service life should be no less than 1000 hours.
Fifth, many humidifiers have auxiliary functions such as water softening and humidity display. To prevent some products from misleading consumers through false advertising by claiming that these functions are not actually present or are ineffective, the standard also sets specific requirements for these auxiliary functions: For water softeners, the standard stipulates that the hardness of the water after softening should not exceed 100 mg/L. Before the water softener fails, the total volume of softened water should not be less than 100L. For humidity display, the standard stipulates that within the relative humidity range of 30% to 70%, the humidity display error should be within ±10% to avoid large errors that could mislead consumers. In addition, the standard also stipulates that since water level can significantly affect the performance of some humidifiers, humidifiers should have a water level protection function to prevent consumers from unknowingly leaving the humidifier in a low-performance, low-efficiency working state for a long time.
