Intake valve device and compressor

Abstract

The utility model provides an air inlet valve device and a compressor, and relates to the technical field of compressors. The air inlet valve device comprises a valve plate, a valve plate, a piston assembly and a limiting piece. An air inlet hole is formed in the valve plate and penetrates through the valve plate, a valve block is arranged on the inner side of the air inlet hole and used for being driven by airflow flowing through the air inlet hole to open or close the air inlet hole, the piston assembly is arranged on the inner side of the air inlet hole, and the limiting piece is arranged between the valve block and the piston assembly. The valve plate abuts against the limiting piece to limit the opening angle of the valve plate. When external airflow enters the air inlet hole, the valve plate is opened under the driving of the airflow, the valve plate can abut against the limiting piece at the moment to limit the opening angle of the valve plate, direct collision between the valve plate and the piston assembly is avoided, meanwhile, the rebound amplitude of the valve plate is reduced, and therefore the collision noise of the valve plate and the valve plate is reduced; and noise generated by the air inlet valve device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an air intake valve device and a compressor. Background Art

[0002] Traditional oil-free compressors consist of a valve plate and a cylinder. The valve plate is capped on the cylinder, which houses a piston assembly that moves to pump gas. The valve plate typically has an air inlet. Currently, commercially available compressors typically use a single air inlet, with a valve plate positioned inside. The piston assembly typically has a metal retainer. When the compressor is running, external air enters the cylinder through the air inlet. When the valve plate is rapidly opened by the incoming airflow, it can easily strike the metal retainer inside the cylinder, generating noise. Simultaneously, when the valve plate rapidly rebounds, the rebound amplitude is large, causing it to continue striking the valve plate, resulting in a continuous sharp noise. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect of high noise of the intake valve device in the prior art, and to provide an intake valve device and a compressor.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides an air intake valve device, which includes a valve plate, a valve sheet, a piston assembly and a limiter;

[0006] An air inlet hole is formed on the valve plate, the air inlet hole passes through the valve plate, a valve plate is provided on the inner side of the air inlet hole, and the valve plate is used to be driven by the air flow passing through the air inlet hole to open or close the air inlet hole;

[0007] The piston assembly is arranged on the inner side of the air inlet hole, and the limiting member is arranged between the valve plate and the piston assembly. When the valve plate is opened, the valve plate abuts against the limiting member to limit the opening angle of the valve plate.

[0008] In this solution, the intake valve assembly includes a valve plate, a valve disc, and a piston assembly. The valve plate is provided with an intake hole that penetrates the valve plate. Under the movement of the piston assembly, gas on the outside of the valve plate can enter the inside of the valve plate through the intake hole. A stopper is provided between the valve plate and the piston assembly. When external airflow enters the intake hole, the valve plate is driven to open by the airflow. At this time, the valve plate can abut against the stopper to limit the opening angle of the valve plate, avoiding direct collision between the valve plate and the piston assembly. At the same time, the amplitude of the valve plate's rebound is reduced, thereby reducing the collision noise between the valve plate and the valve plate, and reducing the noise generated by the intake valve assembly.

[0009] Preferably, the limiting member is provided on the valve plate.

[0010] In this solution, by arranging the limit member on the valve plate, compared with arranging the limit member on the piston assembly, the structure is simpler, the production and installation of the limit member are more convenient, and the production cost is lower.

[0011] Preferably, the outer surface of the limiting member close to the valve disc is inclined along the opening direction of the valve disc.

[0012] In this solution, the outer surface of the limiter close to the valve plate is inclined along the opening direction of the valve plate, so that when the valve plate is opened, the outer surface of the limiter is closer to the extension direction of the valve plate when it is opened, so that the valve plate can better conform to the limiter and avoid the valve plate from breaking due to long-term beating.

[0013] Preferably, the outer surface of the limiting member close to the valve plate is a curved surface, and the curved surface is convex toward the air inlet hole.

[0014] In this solution, the outer surface of the limiter close to the valve plate is transitioned through an arc surface, and the outer surface of the valve plate is smoother, so that when the valve plate is opened, the valve plate can better conform to the limiter, avoiding long-term beating and causing the valve plate to break.

[0015] Preferably, the projection of the limiting member in the vertical direction completely covers the air inlet hole.

[0016] In this solution, the projection of the limiting member in the vertical direction completely covers the air inlet hole, so that the limiting member can more fully limit the air inlet hole, thereby improving the limiting effect of the limiting member.

[0017] Preferably, the outer surface of the limiting member close to the piston assembly is a plane.

[0018] In this solution, by setting the limiter as a plane close to the outer surface of the piston assembly, the limiter can better conform to the shape of the piston assembly, avoiding affecting the normal movement of the piston assembly. When the piston assembly moves, the piston assembly and the limiter can be prevented from colliding, thereby avoiding damage to the limiter.

[0019] Preferably, the number of the air inlet holes is two or more.

[0020] In this solution, the opening angle of the valve plate is limited by setting a limiter, thereby reducing the flow of a single air inlet hole. By setting two or more air inlet holes, the air intake flow of the air inlet hole can be increased, avoiding the flow suppression problem caused by the valve plate opening angle being too small.

[0021] Preferably, the opening angle of the valve plate is in the range of 5-8°.

[0022] In this solution, if the valve opening angle is too large, the valve movement will be large, the valve flapping violently, and the noise will increase. If the valve opening angle is too small, it will easily suppress the flow and affect the flow rate of the air inlet. By controlling the valve opening angle within the range of 5-8°, the adverse effects of excessive or insufficient valve opening angles can be avoided and the noise reduction effect can be improved.

[0023] Preferably, the limiting member is made of PPS plastic.

[0024] In this solution, PPS plastic has low hardness, and the frequency of noise generated when the valve plate is slapped is also lower. At the same time, PPS plastic has high strength and is not easily deformed under long-term impact and slapping. The plastic is easy to injection mold, and the production cost is lower.

[0025] The utility model also provides a compressor, which includes the above-mentioned intake valve device.

[0026] The positive progress effect of this utility model is:

[0027] The intake valve assembly includes a valve plate, a valve disc, and a piston assembly. The valve plate is provided with an intake hole that penetrates the valve plate. As the piston assembly moves, gas on the outside of the valve plate can enter the inside of the valve plate through the intake hole. A stopper is provided between the valve plate and the piston assembly. When external airflow enters the intake hole, the valve plate is driven open by the airflow. At this point, the valve plate abuts against the stopper to limit its opening angle, preventing direct collision between the valve plate and the piston assembly. This also reduces the amplitude of the valve plate's rebound, thereby reducing the collision noise between the valve plate and the valve plate, and thus reducing the noise generated by the intake valve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the three-dimensional structure of the intake valve device in a valve plate closed state according to an embodiment of the present invention.

[0029] Figure 2 The figure is a schematic diagram of the three-dimensional structure of the intake valve device according to one embodiment of the present invention in the valve plate open state.

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the intake valve device according to one embodiment of the present invention when the piston assembly moves downward.

[0031] Figure 4 Schematic diagram of the three-dimensional structure of a valve plate according to an embodiment of the present invention.

[0032] Figure 5 It is a schematic cross-sectional three-dimensional structural diagram of a valve plate according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] Valve plate 100

[0035] Air Inlet 110

[0036] First air inlet 111

[0037] Second air inlet 112

[0038] Valve plate 200

[0039] Piston assembly 300

[0040] Metal Fixer 310

[0041] Limiter 400

[0042] Arc 410

[0043] Fixing 500 DETAILED DESCRIPTION

[0044] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0045] This embodiment provides a compressor, which includes an intake valve device.

[0046] like Figure 1-Figure 3 As shown, the intake valve device includes a valve plate 100, a valve disc 200, a piston assembly 300, and a stopper 400. The valve plate 100 is provided with an intake hole 110, which passes through the valve plate 100. A valve disc 200 is provided inside the intake hole 110. The valve disc 200 is driven by the airflow passing through the intake hole 110 to open or close the intake hole 110. The piston assembly 300 is provided inside the intake hole 110, and the stopper 400 is provided between the valve disc 200 and the piston assembly 300. When the valve disc 200 is open, the valve disc 200 abuts against the stopper 400 to limit the opening angle of the valve disc 200.

[0047] The intake valve assembly includes a valve plate 100, a valve disc 200, and a piston assembly 300. An intake hole 110 is formed on the valve plate 100 and extends through the valve plate 100. As the piston assembly 300 moves, gas outside the valve plate 100 can enter the inside of the valve plate 100 through the intake hole 110. A stopper 400 is provided between the valve disc 200 and the piston assembly 300. When external airflow enters the intake hole 110, the valve disc 200 opens under the drive of the airflow. At this time, the valve disc 200 abuts against the stopper 400 to limit the opening angle of the valve disc 200, avoiding direct collision between the valve disc 200 and the piston assembly 300. This also reduces the amplitude of the valve disc 200's rebound, thereby reducing the collision noise between the valve disc 200 and the valve plate 100 and the noise generated by the intake valve assembly.

[0048] The end of the piston assembly 300 close to the air inlet 110 is usually provided with a metal holder 310, which is easy to collide with the valve plate 200, and the collision between metals is easy to produce sharp noise. Figure 1 As shown, in the original state, the valve plate 200 closes the air inlet 110. Figure 2 As shown, when the piston assembly 300 moves downward, the valve plate 200 inside the air inlet 110 opens under the drive of the air flow. Due to the restriction of the stopper 400, the valve plate 200 will not directly hit the metal fixture 310, thus avoiding the sharp noise caused by the valve plate 200 hitting the metal fixture 310. Figure 3 As shown, the piston assembly 300 moves to the lowest point at the bottom. At this time, the piston assembly 300 moves upward, and the airflow drives the valve disc 200 to move upward. The valve disc 200 hits the valve plate 100. Since the limiter 400 is provided, the opening angle of the valve disc 200 is smaller, so that the strength of the valve disc 200 hitting the valve plate 100 is also reduced, and the rebound force after hitting the valve plate 100 is also smaller, which reduces the sound of the valve disc 200 hitting the valve plate 100 and has the effect of reducing noise.

[0049] like Figure 4 and Figure 5 As shown, in this embodiment, the stopper 400 is disposed on the valve plate 100. Compared to disposing the stopper 400 on the piston assembly 300, the structure is simpler, the manufacture and installation of the stopper 400 are more convenient, and the production cost is lower. In other embodiments, the stopper 400 may also be disposed on the piston assembly 300, or at other locations deemed appropriate by those skilled in the art to limit the opening angle of the valve plate 200.

[0050] In this embodiment, the stopper 400 is plate-shaped, which makes the stopper 400 easier to manufacture and can fully cover the air inlet 110 to achieve a better stopper effect. In other embodiments, other specific shapes of the stopper 400 deemed appropriate by those skilled in the art may also be selected.

[0051] The stopper 400 is fixed to the middle portion of the valve plate 100 by a fixing member 500, thereby facilitating installation and removal of the stopper 400. If the stopper 400 is damaged, it is easy for the operator to replace the stopper 400. In other embodiments, other connection methods for the stopper 400 and the valve plate 100 deemed appropriate by those skilled in the art may also be selected.

[0052] The outer surface of the limit member 400 close to the valve plate 200 is inclined along the opening direction of the valve plate 200, so that when the valve plate 200 is opened, the outer surface of the limit member 400 is closer to the extension direction of the valve plate 200 when it is opened, so that the valve plate 200 can better conform to the limit member 400, avoiding the valve plate 200 from breaking due to long-term beating.

[0053] The outer surface of the stopper 400 near the valve disc 200 is a curved surface 410 that bulges toward the air inlet 110. The curved surface 410 creates a transition from the outer surface of the stopper 400 near the valve disc 200, making the outer surface of the valve disc 200 smoother. This allows the valve disc 200 to conform more readily to the stopper 400 when it is open, preventing breakage of the valve disc 200 from prolonged impact.

[0054] The projection of the limiting member 400 along the vertical direction completely covers the air inlet hole 110 , so that the limiting member 400 can more fully limit the air inlet hole 110 , thereby improving the limiting effect of the limiting member 400 .

[0055] The outer surface of the stopper 400 adjacent to the piston assembly 300 is flat, allowing the stopper 400 to conform more closely to the shape of the piston assembly 300, thereby preventing interference with the normal movement of the piston assembly 300. This prevents collision between the piston assembly 300 and the stopper 400 during movement, thereby preventing damage to the stopper 400. In other embodiments, the outer surface of the stopper 400 may have other specific shapes deemed appropriate by those skilled in the art.

[0056] The number of air inlet holes 110 is two or more. Since the opening angle of the valve plate 200 is limited by setting the limit member 400, the flow of a single air inlet hole 110 is reduced. By setting two or more air inlet holes 110, the air intake flow of the air inlet hole 110 can be increased, avoiding the flow suppression problem caused by the valve plate 200 opening angle being too small.

[0057] In this embodiment, the air inlet 110 includes two air inlet holes 110, a first air inlet hole 111 and a second air inlet hole 112. In other embodiments, the number of air inlet holes 110 that is deemed appropriate by those skilled in the art may also be selected. A valve plate 200 is provided on the inner side of each of the first air inlet hole 111 and the second air inlet hole 112. In this embodiment, there is one limiting member 400, so that the valve plate 200 on the inner side of the first air inlet hole 111 and the second air inlet hole 112 is limited by one limiting member 400. In other embodiments, there may also be multiple limiting members 400, and the multiple limiting members 400 respectively limit the valve plate 200 on the inner side of each air inlet hole 110. Those skilled in the art may select the appropriate number of limiting members 400 as needed.

[0058] The opening angle of the valve disc 200 ranges from 5 to 8 degrees. If the opening angle of the valve disc 200 is too large, the valve disc 200 will move significantly, flapping violently and causing increased noise. If the opening angle of the valve disc 200 is too small, it can easily restrict flow and affect the flow rate of the air inlet 110. By controlling the opening angle of the valve disc 200 within the range of 5 to 8 degrees, the adverse effects of excessively large or small opening angles of the valve disc 200 can be avoided, thereby improving the noise reduction effect.

[0059] The stopper 400 is made of PPS plastic. PPS plastic has a low hardness, resulting in a lower frequency of noise when the valve disc 200 is impacted. PPS plastic also has high strength and is less likely to deform under prolonged impact. Furthermore, PPS plastic is easy to injection mold, resulting in lower production costs. In other embodiments, other materials deemed suitable by those skilled in the art may also be used for the stopper 400.

[0060] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship of the device or component during normal use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation at any time. Therefore, they should not be understood as limiting the present invention in this regard.

[0061] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. An intake valve device, characterized in that: The intake valve device includes a valve plate, a valve sheet, a piston assembly and a limiter; An air inlet hole is formed on the valve plate, the air inlet hole passes through the valve plate, a valve plate is provided on the inner side of the air inlet hole, and the valve plate is used to be driven by the air flow passing through the air inlet hole to open or close the air inlet hole; The piston assembly is arranged on the inner side of the air inlet hole, and the limiting member is arranged between the valve plate and the piston assembly. When the valve plate is opened, the valve plate abuts against the limiting member to limit the opening angle of the valve plate.

2. The intake valve device according to claim 1, characterized in that The limiting component is arranged on the valve plate.

3. The intake valve device according to claim 1, wherein The outer surface of the limiting member close to the valve plate is inclined along the opening direction of the valve plate.

4. The intake valve device according to claim 3, characterized in that The outer surface of the limiting member close to the valve plate is an arc surface, and the arc surface is convex toward the air inlet hole.

5. The intake valve device according to claim 1, wherein The projection of the limiting member along the vertical direction completely covers the air inlet hole.

6. The intake valve device according to claim 1, wherein The outer surface of the limiting member close to the piston assembly is a plane.

7. The intake valve device according to claim 1, wherein The number of the air inlet holes is two or more.

8. The intake valve device according to claim 1, wherein The opening angle of the valve plate is in the range of 5-8°.

9. The intake valve device according to claim 1, wherein: The material of the limiting piece is PPS plastic.

10. A compressor, characterized in that: The compressor comprises an intake valve device according to any one of claims 1-9.

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