A filter device for a compressor

Abstract

The present invention relates to a filter device of a compressor, comprising a primary filter device and a secondary filter device, the primary filter device comprises a primary air inlet and a primary air outlet, the secondary filter device comprises a secondary air inlet and a secondary air outlet, the secondary air inlet is connected to the primary air outlet, the secondary filter device comprises a secondary filter housing and a secondary filter cover covering one end of the secondary filter housing, the secondary air inlet is arranged on the secondary filter cover, the secondary air outlet is arranged at the other end of the secondary filter housing, a filter element is arranged in the secondary filter housing, at least one horizontal plate is arranged at the front end of the secondary air outlet, and the horizontal plate is arranged along the diameter direction of the secondary air outlet. The compressor filter device of the present invention has a good noise reduction effect.

Description

Technical Field

[0001] The invention relates to a compressor filter device, belonging to the technical field of gas filtering. Background Art

[0002] Medical devices such as ventilators and anesthesia machines all require air compressors, and a filter device must be used at the compressor air inlet. Since the air flow rate at the compressor air inlet is fast, the wind noise at the air inlet is relatively large. The medical field has high requirements for wind noise, and the current compressor filter device noise reduction effect cannot meet the requirements. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a compressor noise reduction filter device with obvious noise reduction effect.

[0004] In order to achieve the above-mentioned purpose, the technical solution proposed in the present invention is: a filter device of a compressor, comprising a primary filter device and a secondary filter device, the primary filter device comprises a primary air inlet and a primary air outlet, the secondary filter device comprises a secondary air inlet and a secondary air outlet, the secondary air inlet is connected to the primary air outlet, the secondary filter device comprises a secondary filter housing and a secondary filter cover covering one end of the secondary filter housing, the secondary air inlet is arranged on the secondary filter cover, the secondary air outlet is arranged at the other end of the secondary filter housing, a filter element is arranged in the secondary filter housing, and at least one horizontal plate is arranged at the front end of the secondary air outlet, and the horizontal plate is arranged along the diameter direction of the secondary air outlet.

[0005] A further design of the above technical solution is that the secondary air inlet and the secondary air outlet are staggered.

[0006] The filter element comprises a primary filter element and a secondary filter element.

[0007] The first-level filter device includes a first-level filter seat and a first-level filter cover. The front end of the first-level filter seat is connected to the rear end of the first-level filter cover. After the first-level filter seat and the first-level filter cover are connected, a cavity is formed inside. The cavity is filled with sponge. The rear end of the first-level filter seat is provided with a first-level air inlet. The first-level filter cover includes a connecting part and a first-level air outlet, both of which are cylindrical. The diameter of the connecting part is larger than the diameter of the first-level air outlet. The connecting part and the first-level air outlet are transitionally connected through a buffer part. The diameter of the buffer part gradually decreases from one end close to the connecting part to the other end. A plurality of diverter plates are provided on the inner side of the buffer part. The diverter plates are radially arranged along the buffer part.

[0008] The primary filter seat is in the shape of a cylinder with an open front end and an arc surface at the rear end, and a plurality of primary air inlets are arranged on the arc surface.

[0009] The first-stage air inlet is in the shape of a fan with a smooth curved edge.

[0010] A plurality of first-stage air inlets are evenly arranged along the same arc.

[0011] The arc surface of the primary filter seat is provided with an annular groove on the inner periphery.

[0012] The end surfaces of the plurality of manifolds on the side close to the connecting portion are located in the same plane.

[0013] The beneficial effects of the present invention are:

[0014] In the present invention, a horizontal plate arranged along the diameter direction of the secondary air outlet is provided at the front end of the secondary air outlet, which can divide the airflow entering the secondary air outlet into two paths. The two airflows partially offset each other, which can reduce the flow rate and thus reduce noise.

[0015] In the present invention, the secondary air inlet is directly connected to the primary air outlet, so as to ensure direct transition of airflow and avoid air noise caused by large and small openings.

[0016] There are two-stage filter elements inside the secondary filter housing to perform secondary noise reduction filtration on the high-flow rate gas coming from the primary filter device. According to tests, the gas noise after the secondary filtration is 3 to 4 dB smaller than that of the first stage.

[0017] A filter element is provided at the secondary air outlet. Several gases filtered by the second stage are collected at the air outlet at the same time. The gas is evenly dispersed in the cavity of the filter device to form a torsion flow, the airflow is more stable, and the noise is gradually reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the primary filtering device in an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle filter seat.

[0020] Figure 3 for Figure 2 sectional view of .

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle filter cover.

[0022] Figure 5 for Figure 4 sectional view of .

[0023] Figure 6 It is a schematic diagram of the structure of a secondary filtering device in an embodiment of the present invention.

[0024] Figure 7 for Figure 6 Schematic diagram of the secondary filter housing structure.

[0025] In the figure: 1-first-level filter seat, 11-first-level air inlet, 12-arc surface, 13-annular groove, 2-sponge, 3-first-level filter cover, 31-connecting part, 32-buffer part, 33-first-level air outlet, 34-diverter plate, 4-secondary filter cover, 41-secondary air inlet, 5-first-level filter element, 6-secondary filter element, 7-secondary filter housing, 71-secondary air outlet, 72-horizontal plate. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0027] The filter device of the compressor of this embodiment includes a primary filter device and a secondary filter device connected to each other.

[0028] like Figure 1 As shown, the primary filtering device includes a primary filter seat 1 and a primary filter cover 3. The front end of the primary filter seat 1 is connected to the rear end of the primary filter cover 3. After the primary filter seat 1 and the primary filter cover 3 are connected, a cavity is formed inside. The cavity is filled with sponge 2, which can ensure that the gas flow is not affected and reduce the flow noise of the gas.

[0029] Combination Figure 2 and Figure 3 As shown, the primary filter seat 1 is in the shape of a cylinder with an opening at the front end and an arc surface 12 at the rear end. A plurality of primary air inlets 11 are provided on the arc surface 12. The primary air inlets 11 are in the shape of a fan with a smooth curved edge. The gas enters the filter through the primary air inlet without generating sharp noise and flows smoothly into the primary filter seat. In this embodiment, four primary air inlets 11 are provided and are evenly arranged along the same arc.

[0030] In this embodiment, the arc surface 12 of the primary filter seat 1 is provided with an annular groove 13 on the inner periphery, and the annular groove can position the sponge so that the sponge 2 will not swing and cause airflow disturbance when air flows through.

[0031] Combination Figure 4 and Figure 5As shown, the primary filter cover 3 includes a connecting portion 31 and a primary air outlet 33, both of which are cylindrical. The diameter of the connecting portion 31 is larger than the diameter of the primary air outlet 33. The connecting portion 31 and the primary air outlet 33 are connected by a buffer portion 32. The diameter of the buffer portion 2 gradually decreases from one end close to the connecting portion 31 to one end close to the primary air outlet 33. The diameter of the airflow enters the primary air outlet 33 from the connecting portion 32 and transitions smoothly, thereby ensuring the stability of the airflow. Eight diverter plates 34 are provided on the inner side of the buffer portion 32. The diverter plates 34 are arranged along the radial direction of the buffer portion and are evenly arranged along the circumference of the buffer portion. The diverter plates can divert the airflow so that the airflow flows evenly into the primary air outlet 33, and ensure that the airflow does not suddenly change from a large diameter to a small diameter to cause a whistle, thereby effectively reducing the airflow noise.

[0032] In this embodiment, the end faces of the eight diverter plates 34 on the side close to the connecting portion 31 are located in the same plane, and the end faces of the eight diverter plates 34 can all abut against the end of the sponge, and make the end of the sponge close to the primary air outlet have a regular shape, so that the airflow can flow out of the sponge evenly and smoothly and enter the primary air outlet 33, which can reduce noise.

[0033] like Figure 6 and Figure 7 As shown, the secondary filter device in this embodiment includes a secondary filter housing 7 and a secondary filter cover 4 covering one end of the secondary filter housing 7, the secondary air inlet 41 is arranged on the secondary filter cover 4, and the secondary air outlet 71 is arranged at the other end of the secondary filter housing 7. The secondary filter housing 7 is provided with a primary filter element 5 and a secondary filter element 6, and a transverse plate 72 is provided at the front end of the secondary air outlet 71. The transverse plate 72 is arranged along the diameter direction of the secondary air outlet 71, and the airflow entering the secondary air outlet 71 can be divided into two paths. The two airflows offset each other partially, which can reduce the flow rate and thus reduce the noise.

[0034] In this embodiment, the secondary air inlet 41 and the secondary air outlet 71 are staggered to reduce the gas flow rate through the secondary filter device and reduce noise. The secondary air inlet 41 is connected to the primary air outlet 33 to ensure a smooth transition of airflow between the two-stage filter devices.

[0035] The technical solutions of the present invention are not limited to the above-mentioned embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A filter device for a compressor, characterized in that: It comprises a primary filter device and a secondary filter device, the primary filter device comprises a primary air inlet and a primary air outlet, the secondary filter device comprises a secondary air inlet and a secondary air outlet, the secondary air inlet is butted against the primary air outlet, the secondary filter device comprises a secondary filter housing and a secondary filter cover covering one end of the secondary filter housing, the secondary air inlet is arranged on the secondary filter cover, the secondary air outlet is arranged at the other end of the secondary filter housing, a filter element is arranged in the secondary filter housing, at least one horizontal plate is arranged at the front end of the secondary air outlet, the horizontal plate is arranged along the diameter direction of the secondary air outlet, and the airflow entering the secondary air outlet is divided into two paths, and the two airflows partially offset each other; The primary filter device comprises a primary filter seat and a primary filter cover, the front end of the primary filter seat is connected to the rear end of the primary filter cover, a cavity is formed inside the primary filter seat and the primary filter cover after being connected, the cavity is filled with sponge, a primary air inlet is arranged at the rear end of the primary filter seat, the primary filter cover comprises a connecting portion and a primary air outlet both in a cylindrical shape, the diameter of the connecting portion is larger than the diameter of the primary air outlet, the connecting portion is connected to the primary air outlet via a buffer portion, the diameter of the buffer portion gradually decreases from one end close to the connecting portion to the other end, a plurality of diverter plates are arranged inside the buffer portion, the diverter plates are arranged radially along the buffer portion; the end faces of the plurality of diverter plates on one side close to the connecting portion are located in the same plane, and the end faces of the plurality of diverter plates all abut against the end of the sponge; The primary filter seat is in the shape of a cylinder with an open front end and an arc surface at the rear end. Four primary air inlets are provided on the arc surface. The primary air inlets are in the shape of a sector with a smooth curved edge, and the four primary air inlets are evenly arranged along the same arc.

2. The filter device for the compressor according to claim 1, characterized in that: The secondary air inlet and the secondary air outlet are staggered.

3. The filter device for the compressor according to claim 2, characterized in that: The filter element comprises a primary filter element and a secondary filter element.

4. The filter device for the compressor according to claim 3, characterized in that: The arc surface of the primary filter seat is provided with an annular groove on the inner periphery.

5. The filter device for the compressor according to claim 4, characterized in that: The end surfaces of the plurality of manifolds on the side close to the connecting portion are located in the same plane.

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