Dust collecting apparatus, and projection apparatus suitable for dust collecting apparatus

Abstract

The invention discloses a dust collecting apparatus, and a projection apparatus suitable for the dust collecting apparatus. The dust collecting apparatus comprises: a frame body comprising an air inlet, an air outlet and an airflow channel, wherein the airflow channel is positioned between the air inlet and the air outlet; a fan device arranged on the frame body, positioned in the airflow and used for guiding airflow into the airflow channel from the air inlet; a filtering device arranged on the frame body, positioned in the airflow channel and used for filtering out parts of suspension particles in the airflow; an electrostatic field positioned in the airflow channel, being adjacent to the filtering device, and used for generating an electric field to make remaining suspension particles go through the electric field in order to realize the first electric property of the remaining suspension particles; and an electrostatic device positioned in the airflow channel, being adjacent to the electric field device, wherein the electrostatic device has a second electric property, the first electric property is opposite to the second electric property, and the electrostatic device adsorbs the remaining suspension particles with the first electric property. The suspension particles in the airflow are filtered out first, and then the remaining suspension particles in the airflow are adsorbed in an electrostsatic adsorption mode, so a good dedusting efficiency is reached.

Description

technical field [0001] The invention relates to a dust collecting device and its applicable projection equipment, especially to a dust collecting device which uses a filter screen to filter and electrostatically adsorbs suspended particles and its applicable projection equipment. Background technique [0002] With the development of projectors, the light source of light machines has evolved from ultra-high pressure (UHP) mercury lamps to light-emitting diodes (LEDs), and even to the current laser (Laser). In addition to the projected image color as the focus of research and development, in More consideration should be given to the service life. Generally speaking, the light machine includes a light source and a color wheel (ColorWheel). The operation of the light machine mainly uses a single light source to project onto the color wheel to generate red, blue and green (RGB) three primary colors of light. In the current common laser projectors, in addition to the color wheel,...

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Problems solved by technology

[0003] Therefore, in order to avoid particle pollution caused by air flow, the prior art usually sets a filter to filter the particles in the gas, and then discharges the filtered particles into the dust bag, but while using the filter, it should It is considered that when the pores of the filter screen are too large, it cannot be effectively filtered, and when the pores of the filter screen are denser, the flow of the airflow will be hindered and the heat energy cannot be effectively taken away by the airflow, which reduces the heat dissipation efficiency

In addition, because the filter is usually installed inside the optical machine, the user cannot detect whether the dust collection level of the filter has reached the standard for replacement, resulting in the problem of reduced dust collection efficiency and heat dissipation

[0004] In addition, although infrared detection has been used in the prior art to detect whether the dust collection bag has reached the upper limit of dust collection, since the dust collection bag is prone to irregular deformation with the increase of dust collection level, this infrared detection technology can be expanded through the expansion Whether the dust bag covers the infrared transmission path is used to determine whether the dust bag has reached the upper limit of use. Therefore, the infrared detection technology is prone to misjudgment. Moreover, in general projection equipment, the dust collection device and the dust bag are fixed. It is inside the projection device, so the user cannot actually replace the dust collection device or dust bag that has reached the upper limit of its service life. It is still necessary to send the projection device to the manufacturer or repairer for replacement

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