Air inlet structure of air compressor

Abstract

The utility model provides an air inlet structure of an air compressor, and belongs to the technical field of air compressors. The oil-free air compressor solves the problem that an existing oil-free air compressor is poor in noise reduction effect. The air inlet structure of the air compressor comprises a motor shell, a crankcase and a filter assembly, the filter assembly is fixed to the motor shell, a silencing chamber is formed in the motor shell, the filter assembly is communicated with the silencing chamber, a closed air inlet cavity is formed in the crankcase, and a silencing pipeline is arranged between the silencing chamber and the air inlet cavity. According to the structure, the silencing chamber is arranged to form first silencing in the air inlet process of the air compressor, air in the silencing chamber enters the air inlet cavity of the crankcase through the silencing pipeline, the silencing pipeline conducts second silencing on inlet air of the air compressor, the air compressor is a mute oil-free air compressor, then the air inlet cavity is arranged in the crankcase, and therefore the silencing effect is achieved. Due to the fact that the space of the air inlet cavity is large, third air inlet noise reduction is formed, and air inlet noise is remarkably reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, in particular to an air intake structure of an air compressor. Background Art

[0002] An air compressor is a device that converts mechanical energy into gas pressure and is widely used in industries such as chemical industry, machinery, medical treatment, textile, electric power, automobile and military industry. A filter is an important component of an air compressor and is used to filter air during the air intake process of the air compressor. For example, the Chinese Patent Network discloses an air compressor [Authorization Publication No.: CN220395941U], where an air inlet and an air outlet are provided on the housing of the motor, and a silencing filter is provided at the air inlet. This air compressor has the following defects: after the housing is perforated and then the silencing filter is installed, due to the limited size of the aperture, the volume of the silencing filter installed on the housing is also small, and the silencing effect is limited. Summary of the Utility Model

[0003] The purpose of the utility model is to address the above problems existing in the prior art and propose an air intake structure of an air compressor. The technical problem to be solved by the utility model is: how to solve the problem of poor silencing effect of existing oil-free air compressors.

[0004] The purpose of the utility model can be achieved by the following technical solutions:

[0005] An air intake structure of an air compressor includes a motor housing, a crankcase and a filter assembly. The filter assembly is fixed on the motor housing. It is characterized in that a silencing chamber is formed on the motor housing, the filter assembly is communicated with the silencing chamber, a closed air intake cavity is provided in the crankcase, and a silencing pipeline is provided between the silencing chamber and the air intake cavity.

[0006] Working principle: When the air compressor is started, the outside air flows through the filter assembly and then enters the silencing chamber. The setting of the silencing chamber forms the first stage of silencing during the air intake process of the air compressor. The gas in the silencing chamber enters the air intake cavity of the crankcase through the silencing pipeline, and the silencing pipeline performs the second stage of silencing on the air intake of the air compressor. This air compressor is a silent oil-free air compressor. Furthermore, the air intake cavity is arranged in the crankcase. Since the space of the air intake cavity is large, it forms the third stage of air intake silencing, significantly reducing the noise of the air intake.

[0007] In the intake structure of an air compressor as described above, a filter mounting box is formed on the motor housing. The filter assembly is fixed to the filter mounting box, and a soundproof chamber is formed within the filter mounting box. This structure, with the filter mounting box formed on the motor housing, makes the installation of the filter on the motor housing more convenient. Since the size of the filter mounting box is relatively large, the size of the filter assembly adapted to it is also relatively large. Compared with the prior art, the size of the filter assembly installed on the motor housing is significantly increased, which is beneficial to improving the air intake volume of the air compressor. After the filter assembly is fixed to the filter mounting box, a soundproof chamber is formed within the filter mounting box. When the air compressor is operating, the outside air enters the soundproof chamber after being filtered by the filter assembly, which helps to reduce the intake noise.

[0008] In the intake structure of an air compressor as described above, the motor housing has a ventilation pipe arranged along its axial direction. One end of the ventilation pipe is communicated with the soundproof chamber, one end of the soundproof pipe is communicated with the ventilation pipe, and the other end of the soundproof pipe is communicated with the intake cavity. The ventilation pipe of this structure is integrally formed with the motor housing, and the arrangement of the ventilation pipe facilitates the connection of the soundproof pipe.

[0009] In the intake structure of an air compressor as described above, the soundproof pipe is located within the crankcase. The ventilation pipe and the soundproof pipe together form a soundproof duct. The soundproof duct is installed internally and concealed, and the soundproof pipe is not exposed outside, which plays a role in protecting the soundproof pipe, making the soundproof pipe not easily damaged. At the same time, it also reduces the volume of the air compressor, making the structure of the air compressor more compact and the overall appearance of the air compressor more aesthetically pleasing.

[0010] In the intake structure of an air compressor as described above, the soundproof pipe includes a first soundproof pipe and a second soundproof pipe connected in sequence. Both the first soundproof pipe and the second soundproof pipe are arranged vertically. One end of the second soundproof pipe is communicated with the intake cavity. The inner diameter of the first soundproof pipe is larger than that of the second soundproof pipe, and the inner diameter of the first soundproof pipe is larger than that of the ventilation pipe. During the process of the gas passing through the soundproof pipe, the gas flows through the ventilation pipe, the first soundproof pipe, and the second soundproof pipe in sequence. The inner diameter of the soundproof pipe changes from a small diameter to a large diameter and then to a small diameter. The design structure of this pipe realizes effective noise reduction.

[0011] In the intake structure of an air compressor as described above, the filter assembly includes a mounting plate and a filter. The mounting plate is fixedly connected to the filter mounting box by screws. The mounting plate and the filter mounting box clamp and position the filter. An air inlet is formed on the mounting plate. The filter is arranged between the mounting plate and the filter mounting box. After the mounting plate and the filter mounting box are connected by screws, the filter is clamped and positioned by the two. When the air compressor is operating, the outside air enters the filter through the air inlet.

[0012] In the above-mentioned air intake structure of an air compressor, the filter assembly is a cylindrical silencing filter, and the silencing filter is screwed onto the motor housing.

[0013] In the above-mentioned air intake structure of an air compressor, the motor housing is injection-molded. The motor housing and the filter mounting box are integrally injection-molded, which facilitates the processing and manufacturing of the motor housing, reduces the manufacturing cost of the motor housing, and also makes the air compressor lighter in weight.

[0014] Compared with the prior art, the air intake structure of the air compressor of the present utility model has the following advantages: This structure forms a filter mounting box on the motor housing. Since the size of the filter mounting box is relatively large, the size of the filter assembly adapted thereto is also relatively large. Compared with the prior art, the size of the filter assembly mounted on the motor housing is significantly increased, which is beneficial to increasing the air intake volume of the air compressor. After the filter assembly is fixed on the filter mounting box, a silencing chamber is formed inside the filter mounting box. When the air compressor is working, the outside air enters the silencing chamber after being filtered by the filter assembly, which is beneficial to reducing the intake noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0016] Figure 2 FIG. 2 is one of the sectional structural diagrams of Embodiment 1 of the present utility model.

[0017] Figure 3 FIG. 3 is another sectional structural diagram of Embodiment 1 of the present utility model.

[0018] Figure 4 FIG. 4 is an exploded structural diagram of Embodiment 1 of the present utility model.

[0019] Figure 5 FIG. 5 is one of the partial three-dimensional structural diagrams of Embodiment 1 of the present utility model.

[0020] Figure 6 FIG. 6 is another three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0021] Figure 7 FIG. 7 is a three-dimensional structural diagram of Embodiment 2 of the present utility model.

[0022] In the figures, 1, motor housing; 100, filter mounting box; 101, ventilation pipe; 2, crankcase; 20, intake cavity; 3, filter assembly; 30, mounting plate; 300, air inlet; 31, filter; 4, silencing chamber; 5, silencing pipeline; 50, first silencing pipe; 51, second silencing pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following are specific embodiments of the present utility model, and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described. However, the present utility model is not limited to these embodiments.

[0024] Embodiment 1

[0025] As Figures 1 to 6 shown, the intake structure of this air compressor includes a motor housing 1, a crankcase 2, and a filter assembly 3. The motor housing 1 is injection-molded, and a filter installation box 100 is formed on the motor housing 1. The filter assembly 3 is fixed on the filter installation box 100, and a soundproof chamber 4 is formed in the filter installation box 100. The filter assembly 3 includes a mounting plate 30 and a filter 31. The mounting plate 30 is fixedly connected to the filter installation box 100 by screws. The mounting plate 30 and the filter installation box 100 press and position the filter 31. An air inlet 300 is provided on the mounting plate 30. There is a closed intake cavity 20 in the crankcase 2, and a soundproof pipeline 5 is provided between the soundproof chamber 4 and the intake cavity 20.

[0026] Working principle: When the air compressor starts, the outside air flows through the filter assembly 3 and then enters the soundproof chamber 4. The setting of the soundproof chamber 4 forms the first stage of soundproofing during the intake process of the air compressor. The gas in the soundproof chamber 4 enters the intake cavity 20 of the crankcase 2 through the soundproof pipeline 5. The soundproof pipeline 5 conducts the second stage of soundproofing for the intake of the air compressor. This air compressor is a silent oil-free air compressor. Furthermore, the intake cavity 20 is arranged in the crankcase 2. Since the space of the intake cavity 20 is relatively large, it forms the third stage of intake soundproofing, significantly reducing the intake noise. This structure adopts the formation of the filter installation box 100 on the motor housing 1. Since the size of the filter installation box 100 is relatively large, the size of the filter assembly 3 adapted to it is also relatively large. Compared with the prior art, the size of the filter assembly 3 installed on the motor housing 1 is significantly increased, which is beneficial to improving the intake air volume of the air compressor. After the filter assembly 3 is fixed on the filter installation box 100, a soundproof chamber 4 is formed in the filter installation box 100. When the air compressor works, the outside air enters the soundproof chamber 4 after being filtered by the filter assembly 3, which is beneficial to reducing the intake noise.

[0027] As Figure 4 and Figure 6As shown, the motor housing 1 is provided with a ventilation pipe 101 arranged along its axial direction. One end of the ventilation pipe 101 is communicated with the soundproof chamber 4, one end of the soundproof pipeline 5 is communicated with the ventilation pipe 101, the other end of the soundproof pipeline 5 is communicated with the intake cavity 20, and the soundproof pipeline 5 is located in the crankcase 2. The soundproof pipeline 5 includes a first soundproof pipe 50 and a second soundproof pipe 51 which are sequentially communicated. Both the first soundproof pipe 50 and the second soundproof pipe 51 are arranged vertically. One end of the second soundproof pipe 51 is communicated with the intake cavity 20. The inner diameter of the first soundproof pipe 50 is larger than that of the second soundproof pipe 51, and the inner diameter of the first soundproof pipe 50 is larger than that of the ventilation pipe 101. The soundproof pipeline 5 of this structure adopts an internal and concealed installation method, and the soundproof pipeline 5 is not exposed outside, which plays a role in protecting the soundproof pipeline 5, making the soundproof pipeline 5 not easily damaged. At the same time, it also reduces the volume of the air compressor, makes the structure of the air compressor more compact, and makes the overall appearance of the air compressor more beautiful.

[0028] The motor housing 1 and the ventilation pipe 101 are of a split structure. There is an installation hole in the motor housing 1, and the ventilation pipe 101 is inserted into the installation hole. The filter assembly 3 is a filter. A connecting pipe is formed on the motor housing 1, and the filter is screwed onto the connecting pipe. One end of the soundproof pipeline 5 is communicated with the connecting pipe.

[0029] Embodiment 2

[0030] This embodiment is basically the same as the above Embodiment 1, the difference being that: as Figure 7 shown, the filter assembly 3 is a cylindrical soundproof filter, and the soundproof filter is screwed onto the motor housing 1. In this embodiment, there are two soundproof filters to ensure the air intake of the air compressor.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An air intake structure of an air compressor, comprising a motor housing (1), a crankcase (2) and a filter assembly (3). The filter assembly (3) is fixed on the motor housing (1). The crankcase (2) has a closed air intake cavity (20), and is characterized in that, A silencing pipeline (5) is arranged between the filter component (3) and the air inlet cavity (20). One end of the silencing pipeline (5) is communicated with the filter component (3), and the other end is communicated with the air inlet cavity (20).

2. The intake structure of an air compressor according to claim 1, characterized in that, A filter installation box (100) is formed on the motor housing (1). The filter component (3) is fixed on the filter installation box (100), and a silencing chamber (4) is formed in the filter installation box (100). One end of the silencing pipeline (5) is communicated with the silencing chamber (4).

3. The intake structure of an air compressor according to claim 1, characterized in that, The motor housing (1) has a ventilation pipe (101). One end of the ventilation pipe (101) is communicated with the silencing chamber (4), and one end of the silencing pipeline (5) is communicated with the ventilation pipe (101).

4. The intake structure of an air compressor according to claim 3, wherein, The silencing pipeline (5) includes a first silencing pipe (50) and a second silencing pipe (51). The first silencing pipe (50) and the second silencing pipe (51) are both arranged vertically. One end of the first silencing pipe (50) is communicated with the ventilation pipe (101), the other end of the first silencing pipe (50) is communicated with one end of the second silencing pipe (51), the other end of the second silencing pipe (51) is communicated with the air inlet cavity (20), the inner diameter of the first silencing pipe (50) is larger than the inner diameter of the second silencing pipe (51), and the inner diameter of the first silencing pipe (50) is larger than the inner diameter of the ventilation pipe (101).

5. The intake structure of an air compressor according to claim 3, characterized in that, The motor housing (1) and the ventilation pipe (101) are of a split structure. The motor housing (1) has a mounting hole, and the ventilation pipe (101) is arranged in the mounting hole.

6. The intake structure of an air compressor according to any one of claims 1 to 4, characterized in that, The silencing pipeline (5) is located in the crankcase (2).

7. The intake structure of an air compressor according to claim 2, characterized in that, The filter component (3) includes a mounting plate (30) and a filter (31). The mounting plate (30) is fixedly connected with the filter installation box (100) by screws. The mounting plate (30) and the filter installation box (100) press and position the filter (31), and an air inlet (300) is formed on the mounting plate (30).

8. The intake structure of an air compressor according to claim 1, characterized in that The filter component (3) is a filter. A connecting pipe is formed on the motor housing (1). The filter is screwed on the connecting pipe, and one end of the silencing pipeline (5) is communicated with the connecting pipe.

9. The intake structure of an air compressor according to claim 1, characterized in that, The motor housing (1) is injection molded.

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