A dust and odor removal system for a projector based on negative ion neutralization reaction

Abstract

The utility model discloses a dust and peculiar smell removing system of projector based on negative ion neutralization reaction, the system is embedded on the heat dissipation air duct inside projector, including double circuit mainboard, negative ion generator, sensor, double circuit mainboard is powered for negative ion generator and projector core component through external power supply, and sensor real -time monitoring projector gas concentration in, and feedback is given to double circuit mainboard, and the pulse frequency of negative ion generator is adjusted, the utility model discloses dust and peculiar smell removing system is embedded on the internal air duct inside projector, can effectively to the directional elimination of peculiar smell inside projector, solve the space occupation and dust removal problem simultaneously, and sensor feedback automatic regulation negative ion concentration, ensure efficient energy -conserving, adapt to the scale application of consumer -grade to industrial -grade projection equipment.

Description

Technical Field

[0001] This utility model relates to air purification technology, and in particular to a dust removal and odor removal system for projectors based on negative ion neutralization reaction. Background Technology

[0002] When projectors operate for extended periods, their internal plastic components (lens bracket, housing) release benzene compounds and aldehydes (VOCs) at high temperatures (>60°C), producing a pungent odor. Traditional air purifiers are standalone devices and cannot be effectively integrated with the projector structure. For example, Chinese patent CN210292152U mentions an integrated projector and air purifier that uses dust and air quality sensors to detect air quality and a negative ion generator to purify the air. However, its drawback is its large size and focus solely on detecting external air, neglecting internal dust and odor removal. Patent CN206604283U mentions a dust and odor removal solution using activated carbon and a filter at the air inlet, but its disadvantages include high filter resistance affecting heat dissipation efficiency and the need for regular filter replacement. Existing technologies lack targeted odor elimination solutions for enclosed projector devices. Summary of the Invention

[0003] Purpose of the utility model: The purpose of this utility model is to provide a projector dust removal and odor removal system based on negative ion neutralization reaction, which integrates a micro negative ion generator into the heat dissipation duct inside the projector to achieve odor neutralization inside the device.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a projector dust and odor removal system based on negative ion neutralization reaction. The system is embedded in the heat dissipation duct inside the projector and includes a dual-circuit mainboard, a negative ion generator, and a sensor. The dual-circuit mainboard supplies power to the negative ion generator and the core components of the projector via an external power supply. The sensor monitors the gas concentration inside the projector in real time and feeds it back to the dual-circuit mainboard to adjust the pulse frequency of the negative ion generator.

[0005] Preferably, the dual-circuit motherboard includes a main power supply circuit, a secondary power supply circuit, a PWM controller, and an ADC conversion module. The main power supply circuit is connected to the core components, and the secondary power supply circuit is connected to the negative ion generator.

[0006] Preferably, the negative ion generator includes a negative ion generator tip, a negative ion generator housing, and a negative ion generator port. The negative ion generator port is connected to the auxiliary power supply circuit on the dual-circuit motherboard, and the negative ion generator tip is installed at the air inlet or air outlet of the projector.

[0007] Preferably, the auxiliary power supply circuit supplies 12V voltage and less than 200mA current to the negative ion generator port.

[0008] Preferably, the tip of the negative ion generator adopts a detachable snap-fit ​​structure.

[0009] Preferably, the main power supply circuit provides the core component with a power supply voltage and current of 12V.

[0010] Preferably, the dual-circuit motherboard further includes a PWM controller and an ADC conversion module. After the ADC conversion module converts the sensor monitoring data into digital signals, the PWM controller adjusts the pulse frequency of the negative ion generator.

[0011] Beneficial effects: This utility model has the following advantages: 1. This utility model embeds the dust removal and odor removal system into the internal air duct of the projector, which can effectively eliminate odors inside the projector in a targeted manner, while solving the problems of space occupation and dust removal; 2. The sensor feedback automatically adjusts the negative ion concentration to ensure high efficiency and energy saving, and is suitable for large-scale application of projection equipment from consumer to industrial grade. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the internal structure of a projector; Figure 2 Schematic diagram of a dust removal and odor removal system; Figure 3 This is a block diagram of the motherboard circuit. Figure 4 This is a schematic diagram illustrating the working principle of a negative ion generator. Detailed Implementation

[0013] The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings.

[0014] like Figure 1 As shown, the projector of this utility model includes a housing 1, a speaker 2, a lamp panel 4, an external circulation cooling fan 5, a dust filter 6, an internal circulation radiator 8, and an internal circulation cooling fan 9. Figure 2 As shown, the dust removal and odor removal system embedded in the projector includes a dual-circuit main board 3, a negative ion generator tip 7, a negative ion generator housing 10, a negative ion generator port 11, and a TVOC FS00602 sensor 12.

[0015] The tip 7 of the negative ion generator adopts a detachable snap-fit ​​structure, supporting two types of installation positions, such as... Figure 1 As shown: Position A: External circulation cooling fan exhaust port (preferred choice, utilizing forced convection to quickly degrade toxic substances inside the casing); Position B: Internal circulation cooling fan intake port.

[0016] The block diagram of the dual-circuit motherboard with three circuits is as follows: Figure 3As shown, the system includes a main power supply circuit, a secondary power supply circuit, a PWM controller, and an ADC conversion module. The projector's input power (DC 12-24V) is divided into two independent outputs. One output powers the projector's core components via the main power supply path (12V / 1A), while the other output powers the negative ion generator via the secondary power supply circuit (12V / less than 200mA). The TVOC sensor FS00602 detects the gas concentration inside the projector in real time. After being converted into a digital signal by the ADC module, the signal is used to adjust the pulse frequency of the negative ion generator via the PWM controller. The TVOC concentration is positively correlated with the pulse frequency; the higher the concentration, the faster the frequency, and the stronger the purification, and vice versa, achieving intelligent real-time adjustment.

[0017] The working principle of a negative ion generator is as follows: Figure 4 As shown: The negative ion generator starts when the auxiliary power supply circuit is connected to a low-voltage (12V) DC power supply. The low voltage is boosted by a transistor to generate high-frequency oscillation, which drives a transformer to convert the low-voltage DC into high-frequency AC high voltage. The voltage multiplier rectifier circuit multiplies and rectifies the AC high voltage step by step, finally outputting a negative DC high voltage. A current-limiting resistor is connected in series between the negative high voltage output terminal and the discharge needle, which acts as a protection circuit. This negative high voltage is applied to the sharp metal needle tip through the current-limiting resistor to discharge and ionize air molecules, generating negatively charged oxygen ions (O2⁻), which diffuse into the surrounding air.

[0018] The specific workflow of this system is as follows: After the projector is started, the dual-circuit main board 3 supplies 12V voltage and less than 200mA current to the negative ion generator port 11. Negative ions are generated at the positive and negative ports of the negative ion generator 7. Through primary reaction (physical adsorption), they combine with odor molecules in the shell 1 through Coulomb force to form large particles that settle onto the filter screen 6. Odor neutralization is achieved by utilizing air circulation, while simultaneously solving the problems of space occupation and dust removal.

[0019] In this embodiment, the negative ion generator housing 10 has a volume of only 30×20×15mm, allowing it to be seamlessly embedded in the internal air duct of a projector (compatible with over 90% of models). Its power consumption is <2.4W (accounting for <3% of the total power consumption), and its energy-saving purification efficiency reaches 0.3m³ / (W·h), which is 2.1 times higher than the activated carbon solution. Simultaneously, it can be combined with an aluminum-magnesium alloy shielding layer design to ensure circuit safety and eliminate interference with optical components and wireless signals.

Claims

1. A dust removal and odor removal system for projectors based on negative ion neutralization reaction, characterized in that, The system is embedded in the heat dissipation duct inside the projector and includes a dual-circuit motherboard (3), a negative ion generator, and a sensor (12). The dual-circuit motherboard (3) supplies power to the negative ion generator and the core components of the projector through an external power supply. The sensor (12) monitors the gas concentration inside the projector in real time and feeds it back to the dual-circuit motherboard (3) to adjust the pulse frequency of the negative ion generator.

2. The projector dust removal and odor removal system according to claim 1, characterized in that, The dual-circuit motherboard (3) includes a main power supply circuit, a secondary power supply circuit, a PWM controller, and an ADC conversion module. The main power supply circuit is connected to the core components, and the secondary power supply circuit is connected to the negative ion generator.

3. The projector dust removal and odor removal system according to claim 2, characterized in that, The negative ion generator includes a negative ion generator tip (7), a negative ion generator housing (10), and a negative ion generator port (11). The negative ion generator port (11) is connected to the auxiliary power supply circuit on the dual-circuit main board (3). The negative ion generator tip (7) is installed at the air inlet or air outlet of the projector.

4. The projector dust removal and odor removal system according to claim 3, characterized in that, The auxiliary power supply circuit supplies 12V voltage and less than 200mA current to the negative ion generator port (11).

5. The projector dust removal and odor removal system according to claim 3, characterized in that, The tip (7) of the negative ion generator adopts a detachable snap-fit ​​structure.

6. The projector dust removal and odor removal system according to claim 2, characterized in that, The main power supply circuit provides the core components with a power supply voltage and current of 12V.

7. The projector dust removal and odor removal system according to claim 2, characterized in that, The dual-circuit motherboard (3) also includes a PWM controller and an ADC conversion module. The ADC conversion module converts the data monitored by the sensor (12) into digital signals and then adjusts the pulse frequency of the negative ion generator through the PWM controller.

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