A fresh air filter

Abstract

This utility model relates to the field of fresh air filtration technology, and in particular to a fresh air filter, comprising a drawer valve and a dust collection box installed inside the fresh air duct of an air conditioning unit. The drawer valve includes a removable valve body, a first filter screen and a second filter screen fixed at openings on both sides of the valve body, a pneumatically controlled vibrating device installed on the top surface of the valve body, and an elastic diaphragm installed at the outlet at the lower end of the valve body. This utility model's fresh air filter installs a vibrating device and a dust collection box on the drawer valve. The vibrating device repeatedly vibrates the fresh air filter, automatically removing accumulated dust from the valve body, ensuring the filter remains dust-free for extended periods and does not affect the fresh air intake efficiency. Simultaneously, personnel only need to periodically observe the dust collection box and empty it when it is full, reducing manual labor.

Description

Technical Field

[0001] This utility model relates to the field of fresh air filtration technology, and in particular to a fresh air filter. Background Technology

[0002] To ensure the quality of fresh air intake in air conditioning systems, filter units such as drawer valves are often installed in the fresh air ducts of air conditioning units to filter large particulate pollutants in the air, such as dust and poplar fluff. However, when the drawer valves become clogged, the fresh air intake of the system will decrease, affecting the system's air volume. For rooms with pressure differential requirements, this will directly affect the stability of the system's pressure differential, and may even lead to situations where the room's cleanliness level does not meet the required standards.

[0003] Therefore, in actual use, it is often necessary to arrange personnel to regularly remove and clean the fresh air drawer valve to ensure the fresh air intake of the air conditioning unit. This is both a waste of manpower and prone to oversight. Utility Model Content

[0004] The technical problem this utility model aims to solve is that the fresh air drawer valves on the market require manual disassembly and cleaning, which is time-consuming and labor-intensive, prone to leaks, and can also affect the system airflow and the stability of the system pressure difference.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fresh air filter, including a drawer valve and a dust collection box installed inside the fresh air duct of an air conditioning unit. The drawer valve includes a valve body that can be pulled out and disassembled, a first filter screen and a second filter screen fixed at the opening positions on both sides of the valve body, a pneumatically controlled vibrating device installed on the top surface of the valve body, and an elastic diaphragm installed at the discharge port at the lower end of the valve body.

[0006] The valve body has a bottom discharge port on its lower surface that communicates with the inside of the dust collection box, and the elastic diaphragm is installed at the upper opening of the bottom discharge port.

[0007] The valve body has a handle that is easy to remove.

[0008] The dust collection box is equipped with a sight glass on its side wall for easy observation of the internal dust collection capacity.

[0009] Both the first and second filter screens have bottom discharge ports at the lower end of their windward sides.

[0010] The pneumatically controlled rapping device is positioned between the first filter screen and the second filter screen.

[0011] The beneficial effects of this utility model are:

[0012] (1) A fresh air filter of this utility model is equipped with a vibrating device and a dust collection box on the drawer valve. The vibrating device repeatedly vibrates the fresh air filter, thereby automatically removing the dust accumulated on the valve body, ensuring that the filter is free of dust for a long time and does not affect the fresh air intake efficiency.

[0013] (2) At the same time, personnel only need to observe the condition of the dust collection box periodically and clean the dust after the dust collection box is full, reducing manual input. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Figure 1 and Figure 2 The fresh air filter shown includes a drawer valve and a dust collection box 1 installed inside the fresh air duct of an air conditioning unit. The drawer valve includes a valve body 2 that can be pulled out and removed, a first filter screen 3 and a second filter screen 4 fixed at the opening positions on both sides of the valve body 2, a pneumatically controlled vibrating device 5 installed on the inner top surface of the valve body 2, and an elastic diaphragm 6 installed at the discharge port at the lower end of the valve body 1.

[0020] In order to facilitate the introduction of dust from the filter screen into the dust collection box 1, the lower surface of the valve body 2 is provided with a bottom discharge port 7 that is connected to the inside of the dust collection box 1, and the elastic diaphragm 6 is installed at the upper opening of the bottom discharge port 7.

[0021] For easy disassembly and assembly, a handle 8 is installed on the outer side of the valve body 2.

[0022] The valve's first filter screen 3, second filter screen 4, and handle 8 are made into partially detachable structures for easy maintenance. The lower part of the elastic diaphragm 6 is a communication port. When the unit is not turned on, the elastic diaphragm 6 is in the open state with the upper part facing up. Before the unit is turned on, there is no pressure in the valve body 2, the elastic diaphragm 6 is open, the pneumatically controlled vibrating device 5 is turned on, and the dust enters the dust collection box 1 through the bottom discharge port 7 below the elastic diaphragm 6. After the unit is turned on, there is fresh air pressure in the valve body 2. Due to the fresh air pressure, the elastic diaphragm 6 flips down and closes, preventing fresh air from entering the dust collection box 1.

[0023] To facilitate external observation, a sight glass 9 is installed on the side wall of the dust collection box 1 to facilitate observation of the internal dust collection capacity.

[0024] In order to guide the dust that falls off the first filter screen 3 and the second filter screen 4 after vibration, both the first filter screen 3 and the second filter screen 4 are provided with bottom discharge ports 7 at the lower end of their windward sides.

[0025] To improve the rapping effect, the pneumatically controlled rapping device 5 is installed between the first filter screen 3 and the second filter screen 4.

[0026] During installation, the pneumatically controlled rapping device 5 is connected to compressed air, and an existing electric valve is installed at the interface. Before starting the unit, the back-blowing device is activated first, followed by starting the motor. This reverses the blowing of the elastic diaphragm 6, opening and widening the bottom discharge port 7. The pneumatically controlled rapping device 5, controlled by high-pressure air, vibrates the inner walls of the first filter screen 3 and the second filter screen 4, ensuring that dust can smoothly pass through the bottom discharge port 7 and enter the dust collection box 1. Simultaneously, the double-layer filtration structure prevents dust from entering the tail duct after rapping, avoiding duct contamination. After rapping, the dust falls into the lower dust collection box. A transparent sight glass 9 is installed on the side of the dust collection box 1 for easy observation of its capacity.

[0027] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fresh air filter, comprising a drawer valve and a dust collection box (1) installed inside the fresh air duct of an air conditioning unit, characterized in that: The drawer valve includes a valve body (2) that can be pulled out and disassembled, a first filter screen (3) and a second filter screen (4) fixed at the opening positions on both sides of the valve body (2), a pneumatically controlled vibrating device (5) installed on the inner top surface of the valve body (2), and an elastic diaphragm (6) installed at the lower end of the valve body (2).

2. The fresh air filter according to claim 1, characterized in that: The valve body (2) has a bottom discharge port (7) on its lower surface that communicates with the inside of the dust collection box (1), and the elastic diaphragm (6) is installed at the upper opening of the bottom discharge port (7).

3. A fresh air filter according to claim 1, characterized in that: The valve body (2) is equipped with a handle (8) that is easy to disassemble on its outer side.

4. A fresh air filter according to claim 1, characterized in that: The dust collection box (1) is equipped with a sight glass (9) on its side wall for easy observation of the internal dust collection capacity.

5. A fresh air filter according to claim 1, characterized in that: Both the first filter screen (3) and the second filter screen (4) have bottom discharge ports (7) at the lower end of their windward surfaces.

6. A fresh air filter according to claim 1, characterized in that: The pneumatically controlled vibrating device (5) is positioned between the first filter screen (3) and the second filter screen (4).

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