Dust collector and projection apparatus with same

Patent metadata

Field	Value
Publication number	US-2016236131-A1
Application number	US-201514828782-A
Country	US
Kind code	A1
Filing date	Aug 18, 2015
Priority date	Feb 13, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

A dust collector includes a casing, a fan, a filtering element, an electric field generator and an electrostatic precipitator. The casing includes an inlet, an outlet and a channel. The channel is arranged between the inlet and the outlet. An ambient airflow is introduced into the channel through the inlet by the fan. Moreover, portions of suspended particles in the airflow are filtered off by the filtering element. The electric field generator generates an electric field. The suspended particles passing through the electric field generator have a first electrical polarity. The electrostatic precipitator has a second electrical polarity, wherein the first electrical polarity and the second electrical polarity are opposite. The suspended particles with the first electrical polarity are adsorbed by the electrostatic precipitator.

First claim

What is claimed is:

1 . A dust collector, comprising:
a casing comprising an inlet, an outlet and a channel, wherein the channel is arranged between the inlet and the outlet; a fan installed in the casing and disposed within the channel, wherein an ambient airflow is introduced into the channel through the inlet by the fan; a filtering element installed in the casing and disposed within the channel, wherein portions of suspended particles in the airflow are filtered off by the filtering element; an electric field generator installed in the casing and disposed within the channel, wherein the electric field generator is arranged beside the filtering element and generates an electric field, wherein the suspended particles passing through the electric field generator have a first electrical polarity; and an electrostatic precipitator installed in the casing and disposed within the channel, wherein the electrostatic precipitator is arranged beside the electric field generator and has a second electrical polarity, wherein the first electrical polarity and the second electrical polarity are opposite, wherein the suspended particles with the first electrical polarity are adsorbed by the electrostatic precipitator.

2 . The dust collector according to claim 1 , wherein the fan, the filtering element, the electric field generator and/or the electrostatic precipitator are modularized units, wherein the casing comprises a first insertion slot, a second insertion slot, a third insertion slot and a fourth insertion slot, wherein the fan, the filtering element, the electric field generator and the electrostatic precipitator are inserted into the first insertion slot, the second insertion slot, the third insertion slot and the fourth insertion slot, respectively.

3 . The dust collector according to claim 1 , further comprising a sensing structure, wherein the sensing structure is disposed within the casing and isolated from the electrostatic precipitator, wherein the sensing structure is aligned with the electrostatic precipitator, and a capacitance value of the electrostatic precipitator is sensed by the sensing structure.

4 . The dust collector according to claim 3 , further comprising an insulation structure, wherein the insulation structure is arranged between the casing and the sensing structure.

5 . The dust collector according to claim 3 , further comprising a detecting unit, wherein the detecting unit is electrically connected with the sensing structure, wherein according to the capacitance value of the electrostatic precipitator, the detecting unit judges whether a dust collecting level of the electrostatic precipitator reaches a preset level.

6 . The dust collector according to claim 5 , further comprising a warning unit, wherein the warning unit is electrically connected with the detecting unit, and the warning unit issues a warning signal in response to a triggering signal from the detecting unit.

7 . The dust collector according to claim 3 , wherein the sensing structure is made of metallic material.

8 . The dust collector according to claim 1 , wherein the casing further comprises plural fastening parts beside the inlet, and the fan is arranged beside the filtering element, wherein after plural fastening elements are penetrated through the corresponding fastening parts and tightened into corresponding fixing holes of the fan, the fan is fixed on the casing.

9 . The dust collector according to claim 1 , wherein the electric field generator and the electrostatic precipitator are made of metallic material.

10 . A projection apparatus, comprising:
an illumination system; and a dust collector comprising:
a casing comprising an inlet, an outlet and a channel, wherein the channel is arranged between the inlet and the outlet;
a fan installed in the casing and disposed within the channel, wherein an ambient airflow is introduced into the channel through the inlet by the fan;
a filtering element installed in the casing and disposed within the channel, wherein portions of suspended particles in the airflow are filtered off by the filtering element;
an electric field generator installed in the casing and disposed within the channel, wherein the electric field generator is arranged beside the filtering element and generates an electric field, wherein the suspended particles passing through the electric field generator have a first electrical polarity; and
an electrostatic precipitator installed in the casing and disposed within the channel, wherein the electrostatic precipitator is arranged beside the electric field generator and has a second electrical polarity, wherein the first electrical polarity and the second electrical polarity are opposite, wherein the suspended particles with the first electrical polarity are adsorbed by the electrostatic precipitator,
wherein the airflow passing through the electrostatic precipitator is directed to the illumination system to remove heat of the illumination system.

Assignees

• Delta Electronics Inc

Inventors

• Lin Bo-Song

Classifications

• H04N9/3144

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• B03C3/47

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