Valve and air compressor with same

Abstract

The valve comprises a pressing piece and a diaphragm, the pressing piece is suitable for being connected with an air cylinder, at least one matching groove is formed in the surface of the side, facing the air cylinder, of the pressing piece, the diaphragm comprises a movable section and a matching section which are connected with each other, and the movable section is matched with the matching section. The movable section is suitable for being movably arranged between the pressing piece and the air cylinder so as to open or close an exhaust hole of the air cylinder, the end face of the free end of the matching section protrudes out of the peripheral face of the movable section, and the matching section is movably arranged in the matching groove in a matched mode. According to the valve, the connecting and fixing structure of the diaphragm and the pressing piece is simple, the structure of the valve is simplified, and the reliability is high.

Description

Technical Field

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

[0002] A one-way valve generally includes a valve body and a sealing plate. There is a through hole on the valve body. When the air is pumped, the air pushes the sealing plate to exhaust the air. During the piston reset process, the air pressure in the valve body decreases, and the air outside the one-way valve pushes the sealing plate to cover the through hole to prevent air from returning. In the related art, the fixing structure of the sealing plate is complicated, which increases the difficulty of assembling the one-way valve. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a valve, the connection and fixing structure of the diaphragm and the pressing plate is simple, the structure of the valve is simplified, and the reliability is high.

[0004] Another object of the utility model is to provide an air compressor using the valve.

[0005] The valve according to the embodiment of the first aspect of the utility model includes: a pressing plate, which is suitable for being connected to a cylinder, and at least one matching groove is formed on the surface of the pressing plate on the side facing the cylinder; a diaphragm, which includes a movable section and a matching section connected to each other, and the movable section is suitable for being movably arranged between the pressing plate and the cylinder to open or close the exhaust hole of the cylinder, the free end face of the matching section protrudes from the outer peripheral surface of the movable section, and the matching section can be movably fitted in the matching groove.

[0006] According to the valve of the first embodiment of the utility model, the diaphragm is sandwiched between the pressing plate and the top cover through the interaction between the matching section and the matching groove, which is beneficial to the use of the diaphragm. The fixing method of the diaphragm is simple, and the fixing structure is also simple, thereby simplifying the structure of the valve and improving production efficiency. Moreover, the assembly of the diaphragm and the pressing plate is simple and the assembly efficiency is high. In addition, the matching groove has a limiting effect on the matching section, which limits the rotation of the diaphragm relative to the pressing plate, thereby improving the reliability of the use of the diaphragm and improving the reliability of the valve.

[0007] According to some embodiments of the present invention, the bottom wall of the matching groove extends obliquely from the edge of the pressing sheet toward the center and away from the diaphragm.

[0008] According to some embodiments of the present invention, the mating segment horizontally extends radially outward from the outer circumferential surface of the movable segment.

[0009] According to some embodiments of the utility model, the mating grooves are formed in plurality, and the plurality of mating grooves are arranged at intervals along the circumference of the pressing sheet; the mating segments are formed in plurality, and the plurality of mating segments are arranged at intervals along the circumference of the movable segment; and the plurality of mating segments are respectively mated in the plurality of mating grooves.

[0010] According to some embodiments of the utility model, the movable section includes: an elastic portion, the fitting section is connected to the outer peripheral surface of the elastic portion; a stop portion, the stop portion is connected to the elastic portion, the stop portion is located radially inside the elastic portion, the stop portion and the elastic portion jointly define an exhaust channel, the stop portion is suitable to be opposite to the exhaust hole, and when the diaphragm closes the exhaust hole, the stop portion covers the exhaust hole.

[0011] According to some embodiments of the utility model, the elastic portion includes: a first elastic portion, which is bent and extended along the circumferential direction of the pressing piece; two second elastic portions, one ends of the two second elastic portions are respectively connected to the two ends of the first elastic portion, and the other ends of the two second elastic portions are close to each other and extend along the circumferential direction of the pressing piece; a third elastic portion, one end of the third elastic portion is connected to the stop portion, and the other end of the third elastic portion extends radially outward to be connected to the other ends of the two second elastic portions respectively, and the other end of the third elastic portion smoothly transitions to the other end of the second elastic portion.

[0012] According to some embodiments of the present invention, the plurality of matching segments are respectively connected to two ends of the first elastic portion.

[0013] According to some embodiments of the present invention, the hardness of the stopper portion is greater than the hardness of the elastic portion.

[0014] According to some embodiments of the utility model, the valve further includes: a valve body, the valve body is arranged on a side of the diaphragm away from the pressing plate, the valve body is suitable for being connected to the cylinder, a through hole is formed on the valve body, and the through hole is suitable for being opposite to the exhaust hole.

[0015] An air compressor according to an embodiment of the second aspect of the utility model comprises the valve according to the embodiment of the first aspect.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is an assembly diagram of a valve and a cylinder according to an embodiment of the utility model;

[0019] Figure 2 is an exploded view of a valve and a top cover of a cylinder according to an embodiment of the utility model;

[0020] Figure 3 is an exploded view of a valve according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of a valve pressing sheet according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100, valve; 200, cylinder;

[0024] 1. Tableting; 11. Matching groove;

[0025] 12. tablet body; 121. opening; 13. extension part;

[0026] 2. Diaphragm; 20. Active section; 21. Matching section; 22. Elastic part;

[0027] 221, first elastic portion; 222, second elastic portion; 223, third elastic portion;

[0028] 23. Stopper; 231. Exhaust channel;

[0029] 201. Exhaust hole; 202. Top cover; 203. Groove. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 4 The valve 100 according to the first embodiment of the present invention is described. For example, in the following description of the present application, the valve 100 is taken as a one-way valve for example.

[0031] like Figure 2 and Figure 3 As shown, the valve 100 according to the embodiment of the first aspect of the utility model includes a pressing plate 1 and a diaphragm 2.

[0032] Specifically, the pressing piece 1 is suitable for being connected to the cylinder 200, and at least one matching groove 11 is formed on the surface of the pressing piece 1 on one side facing the cylinder 200. The diaphragm 2 includes a movable section 20 and a matching section 21 connected to each other, and the movable section 20 is suitable for being movably arranged between the pressing piece 1 and the cylinder 200 to open or close the exhaust hole 201 of the cylinder 200, and the free end surface of the matching section 21 protrudes from the outer peripheral surface of the movable section 20, and the matching section 21 can be movably matched in the matching groove 11.

[0033] For example, in Figure 1-Figure 3 In the example, a vent hole 201 is formed on the top cover 202 of the cylinder 200, and the pressing plate 1 of the valve 100 can be directly mounted on the top cover 202. The diaphragm 2 is disposed between the pressing plate 1 and the upper surface of the top cover 202, and is movable in the up and down directions. When the diaphragm 2 contacts the upper surface of the top cover 202, the diaphragm 2 can cover the vent hole 201 to close the vent hole 201. When the cylinder 200 is inflated, the gas in the cylinder 200 is compressed, the air pressure increases, the compressed gas overcomes the force of the diaphragm 2, such as the elastic force, and pushes the portion of the diaphragm 2 opposite to the vent hole 201, at least a portion of the diaphragm 2 moves upward, and the above-mentioned at least a portion of the diaphragm 2 is lifted and separated from the vent hole 201 to open the vent hole 201, and the gas in the cylinder 200 is discharged through the valve 100.

[0034] For example, in Figure 3 In the example, one end of the matching segment 21 is connected to the movable segment 20, and the movable segment 20 is roughly annular in structure. The movable segment 20 is between the upper surface of the pressing sheet 1 and the top cover 202, and is movable in the up and down direction. The other end face of the matching segment 21 (that is, the free end face of the matching segment 21 mentioned above) protrudes from the outer peripheral surface of the movable segment 20. In other words, the surface of the matching segment 21 away from the center of the diaphragm 2 is located on the outer peripheral side of the surface of the movable segment 20 away from the center of the diaphragm 2, so as to facilitate the free end of the matching segment 21 to extend and fit in the matching groove 11, and also facilitate the assembly of the matching segment 21 and the matching groove 11. It should be noted that the matching segment 21 can be an elastic sheet structure integrally formed with the movable segment 20, such as an integrally formed elastic rubber part. Alternatively, the matching segment 21 is a convex block structure independently connected to the movable segment 20, or alternatively, the matching segment 21 is a convex block structure detachably connected to the movable segment 20. Of course, the optimal solution is the integral elastic sheet structure described later in this application.

[0035] During the opening of the exhaust hole 201, the matching section 21 can move slightly in the matching groove 11 in the up-down direction to reduce the stress on the matching section 21 during the movement of the diaphragm 2, thereby extending the service life of the diaphragm 2, thereby extending the service life of the valve 100, and also facilitating the smooth opening of the valve 100. In addition, through the interaction between the matching section 21 and the matching groove 11, the diaphragm 2 is sandwiched between the pressing plate 1 and the top cover 202, which is beneficial to the use of the diaphragm 2. The connection and fixing method of the diaphragm 2 and the pressing plate 1 is simple, thereby simplifying the structure of the valve 100 and improving the production efficiency of the valve 100. Moreover, the assembly of the diaphragm 2 and the pressing plate 1 is simple and the assembly efficiency is high. In addition, the matching groove 11 has a limiting effect on the matching section 21, which limits the rotation of the diaphragm 2 relative to the pressing plate 1, thereby improving the reliability of the use of the diaphragm 2 and the reliability of the valve 100. That is, the pressing plate 1 and the matching groove 11 limit the diaphragm 2 to only lift and cannot rotate, which greatly improves the service life of the diaphragm 2 and the stability of the seal.

[0036] According to the valve 100 of the first embodiment of the utility model, through the interaction between the matching section 21 and the matching groove 11, the diaphragm 2 is clamped between the pressing plate 1 and the top cover 202, which is beneficial to the use of the diaphragm 2. At the same time, the fixing method of the diaphragm 2 is simple, and the fixing structure is also simple, thereby simplifying the structure of the valve 100 and improving the production efficiency. Moreover, the assembly of the diaphragm 2 and the pressing plate 1 is simple and the assembly efficiency is high. In addition, the matching groove 11 has a limiting effect on the matching section 21, which limits the rotation of the diaphragm 2 relative to the pressing plate 1, thereby improving the reliability of the use of the diaphragm 2 and improving the reliability of the valve 100.

[0037] According to some embodiments of the present invention, Figure 4 , from the edge of the pressing sheet 1 toward the center, the bottom wall of the matching groove 11 extends obliquely toward the direction away from the diaphragm 2. For example, in Figure 4 In the example, the outer contour of the pressing piece 1 is generally circular, and the depth of the matching groove 11 gradually increases from the edge of the pressing piece 1 radially inward. When the matching segment 21 is matched in the matching groove 11, the matching segment 21 can move slightly along the extension direction of the matching groove 11 to facilitate the movement of the diaphragm 2 when the exhaust hole 201 is opened.

[0038] During the opening of the vent hole 201, the portion of the matching segment 21 close to the center of the diaphragm 2 can be moved along the thickness direction of the pressing sheet 1 (for example, Figure 1 and Figure 4The diaphragm 2 is moved in the up and down directions in the valve 100, so as to facilitate the diaphragm 2 to open the exhaust hole 201 under the action of the gas, thereby facilitating the movement of the diaphragm 2 between the top cover 202 and the pressing plate 1. In addition, and in the process of lifting the diaphragm 2, the diaphragm 2 is partially deformed, such as the deformed part moves upward, and the matching section 21 shrinks and slides in the matching groove 11, which reduces the stress distribution of the diaphragm 2 during the lifting process, that is, the stress generated by the deformation or movement of the diaphragm 2 will not be several. At the connection position between the matching section 21 and the diaphragm 2, the stress can be dispersed, which greatly improves the service life of the valve 100. Moreover, the matching groove 11 has a simple structure and low production difficulty, which can simplify the structure of the valve 100, reduce the production difficulty, and improve the production efficiency. For example, the side of the matching groove 11 close to the center of the pressing plate 1 and the side facing the diaphragm 2 are open, so as to be more conducive to the matching of the matching section 21 and the matching groove 11, and to the assembly of the diaphragm 2 and the pressing plate 1.

[0039] According to some embodiments of the present invention, Figure 2 and Figure 3 , the mating section 21 extends horizontally and radially outward from the outer peripheral surface of the movable section 20. Figure 2 and Figure 3 In the example, one end of the mating segment 21 is connected to the outer peripheral surface of the movable segment 20, and the other end of the mating segment 21 extends horizontally and radially outward in a straight line. With such an arrangement, the mating segment 21 has a simple structure, low production difficulty, low production cost, and high production efficiency. In addition, the horizontally extending mating segment 21 allows a gap between the upper side surface of one end of the mating segment 21 close to the center of the diaphragm 2 and the bottom wall of the mating groove 11 when the exhaust hole 201 is not opened, so as to facilitate the movement of the mating segment 21 in the mating groove 11 when the exhaust hole 201 is opened, thereby facilitating the smooth opening of the valve 100.

[0040] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 There are multiple matching grooves 11, which are arranged at intervals along the circumference of the pressing piece 1, and there are multiple matching segments 21, which are arranged at intervals along the circumference of the movable segment 20, and the multiple matching segments 21 are respectively matched in the multiple matching grooves 11. In the description of the utility model, the meaning of "multiple" is two or more.

[0041] For example, in Figure 2 and Figure 3In the example, two matching grooves 11 are formed, and the two matching grooves 11 are opposite to each other along the radial direction of the pressing plate 1. Two matching segments 21 are also provided, and the two matching segments 21 are respectively connected to the outer peripheral surface of the movable segment 20 and are opposite to each other in radial direction. Therefore, through the mutual cooperation of multiple matching segments 21 and multiple matching grooves 11, the connection contact area between the diaphragm 2 and the pressing plate 1 is increased, and the connection reliability of the diaphragm 2 is improved. In addition, the force on the movable segment 20 at various locations in the circumference is more balanced, thereby improving the reliability of the movement of the movable segment 20, and further improving the reliability of the opening and closing of the valve 100. It should be noted that the number of matching segments 21 and matching grooves 11 can be set according to the specific use. Figure 2 and Figure 3 In the example, the number of the matching sections 21 is small, and the normal use of the diaphragm 2 can be guaranteed, thereby reducing the production cost of the valve 100.

[0042] According to some embodiments of the present invention, Figure 2 and Figure 3 The movable section 20 includes an elastic portion 22 and a stopper 23. Specifically, the matching section 21 is connected to the outer circumferential surface of the elastic portion 22, and the stopper 23 is connected to the elastic portion 22. The stopper 23 is located radially inside the elastic portion 22. The stopper 23 and the elastic portion 22 jointly define an exhaust channel 231. The stopper 23 is adapted to be opposite to the exhaust hole 201. When the movable section 20 closes the exhaust hole 201, the stopper 23 covers the exhaust hole 201.

[0043] For example, in Figure 2 and Figure 3 In the example, the elastic part 22 is generally annular in structure, the stopper 23 is located at the inner circumference of the elastic part 22 and connected to the elastic part 22, the matching section 21 is located at the outer circumference of the elastic part 22 and connected to the elastic part 22, the stopper 23 is circular in shape, and the surface area of ​​the stopper 23 is greater than the surface area of ​​the exhaust hole 201. The opening and closing process of the valve 100 is generally as follows:

[0044] When the air pump is pumping air, the gas in the cylinder 200 is compressed, the air pressure increases, the stopper 23 is lifted up and separated from the exhaust hole 201 by the pressure difference force, and the compressed air is discharged from the exhaust hole 201, the exhaust channel 231 and the opening 121 on the pressing plate 1 in sequence. In the process of the stopper 23 being lifted up, the elastic part 22 is deformed or moved upward under the action of the stopper 23. As the air pressure in the cylinder 200 decreases, under the elastic force of the elastic part 22 and the gravity of the diaphragm 2, the diaphragm 2 resets the active section 20 to cover the exhaust hole 201. When the piston (not shown) of the cylinder 200 continues to be pulled out, negative pressure is formed in the cylinder 200, and the active section 20 is subjected to the pressure difference force in the opposite direction to the original direction, which presses the active section 20 to the exhaust hole 201, preventing the high-pressure gas from flowing back from the exhaust hole 201 into the cylinder 200. The negative pressure enables the movable section 20 to seal the exhaust hole 201 , thereby improving the sealing performance at the exhaust hole 201 .

[0045] In this way, on the one hand, the setting of the elastic part 22 and the stopper 23 is conducive to the opening and closing of the exhaust hole 201, and is also conducive to the movement of the movable section 20 between the pressing plate 1 and the top cover 202, thereby ensuring the normal use of the valve 100. In addition, the exhaust channel 231 is conducive to the smooth discharge of gas. On the other hand, the movable section 20 has a simple structure, is easy to use, and has a low production cost. In addition, the setting of the pressing plate 1 can limit the distance that the diaphragm 2 moves upward, thereby facilitating the diaphragm 2 to fall back to the top cover 202 to close the exhaust hole 201.

[0046] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The elastic part 22 includes a first elastic part 221, two second elastic parts 222 and a third elastic part 223. The first elastic part 221 is bent and extended along the circumferential direction of the pressing piece 1, one end of the two second elastic parts 222 is respectively connected to the two ends of the first elastic part 221, the other ends of the two second elastic parts 222 are close to each other and are bent and extended along the circumferential direction of the pressing piece 1, one end of the third elastic part 223 is connected to the stopper 23, the other end of the third elastic part 223 extends radially outward to be respectively connected to the other ends of the two second elastic parts 222, and the other end of the third elastic part 223 is smoothly transitioned to the other end of the second elastic part 222.

[0047] For example, in Figure 2 and Figure 3In the example, the first elastic part 221 is roughly semicircular, the above-mentioned one ends of the two second elastic parts 222 are respectively connected to the two free ends of the first elastic part 221, the above-mentioned other ends of the two second elastic parts 222 are bent and extended along the circumference of the pressing piece 1, and the two second elastic parts 222 and the third elastic part 223 are connected to form a roughly M shape. The above-mentioned one end of the third elastic part 223 is connected to the outer peripheral surface of the stopper 23. The first elastic part 221 and the two second elastic parts 222 constitute an annular elastic part 22, and an exhaust channel 231 is defined between the first elastic part 221 and the two second elastic parts 222 and the stopper 23. With such a configuration, on the one hand, the third elastic part 223 is conducive to the connection between the elastic part 22 and the stopper 23, and the third elastic part 223 extends along the radial direction of the elastic part 22, and the third elastic part 223 can be made shorter and smaller in size, thereby reducing the production cost of the elastic part 22. On the other hand, while facilitating the connection between the elastic part 22 and the stop part 23, during the movement of the diaphragm 2, the elastic part 22 is subjected to uniform force at various circumferential locations, thereby avoiding excessive plastic deformation at some locations, which would result in poor sealing of the exhaust hole 201 when the valve 100 is closed.

[0048] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the plurality of matching segments 21 are respectively connected to the two ends of the first elastic portion 221. Figure 2 and Figure 3 In the example, two matching segments 21 are provided, and the two matching segments 21 are opposite to each other along the radial direction of the diaphragm 2, and one end of each matching segment 21 close to the diaphragm 2 is respectively connected to the free end of the first elastic part 221 and the above-mentioned one end of the second elastic part 222 at the corresponding position. The diaphragm 2 is arranged symmetrically with respect to the extension direction of the third elastic part 223. As a result, the stress generated by the two matching segments 21 when the diaphragm 2 moves is roughly the same, and the elastic part 22 can move upward stably as a whole under the action of the two matching segments 21, further improving the reliability of the movement of the diaphragm 2.

[0049] Optionally, combined Figure 2 and Figure 3 , the diaphragm 2 is an integrally formed part. As a result, the overall structural strength of the diaphragm 2 is high, which is conducive to the long-term and stable use of the diaphragm 2. In addition, there is no need to use other components to connect the various parts of the diaphragm 2, which simplifies the structure of the diaphragm 2. At the same time, it is also conducive to the processing and molding of the diaphragm 2.

[0050] According to some embodiments of the utility model, the hardness of the stopper 23 is greater than the hardness of the elastic part 22. With such a configuration, the elastic part 22 is softer than the stopper 23, which is conducive to the elastic part 22 smoothly deforming or moving upward under the action of the stopper 23 when the exhaust hole 201 is opened, so as to facilitate the rapid opening of the exhaust hole 201. In addition, the stopper 23 has a certain hardness. When the stopper 23 covers the exhaust hole 201, the stopper 23 can seal the exhaust hole 201. The gap between the stopper 23 and the outer periphery of the exhaust hole 201 is small, which ensures the one-way exhaust of the one-way valve and the gas is not easy to flow back. Moreover, it is also conducive to the stopper 23 falling back to the exhaust hole 201 to close the exhaust hole 201. It should be noted that the elastic part 22 is not necessarily made of rubber. Since the overall thickness of the diaphragm 2 is small, when the stopper 23 is subjected to the force of the gas, the elastic part 22 can be deformed or slightly moved upward as a whole.

[0051] According to some optional embodiments of the present invention, combined with Figure 2 and Figure 3 The tablet 1 includes a tablet body 12 and an extension 13. The extension 13 is located on the side of the tablet body 12 facing the diaphragm 2 in the thickness direction. The extension 13 is connected to the outer peripheral surface of the tablet body 12. The extension 13 extends along the circumference of the tablet body 12. The cross-sectional shape of the extension 13 is annular. A plurality of openings 121 are formed on the tablet body 12. The plurality of openings 121 are respectively connected to the exhaust passage 231. The matching groove 11 is formed on the extension 13. Thus, the tablet 1 can be connected to the upper surface of the top cover 202 through the extension 13, which increases the contact area between the tablet 1 and the top cover 202 and improves the connection stability of the tablet 1. In addition, the setting of the opening 121 is conducive to the smooth discharge of the gas in the cylinder 200, and the tablet body 12 can limit the movement of the diaphragm 2 to avoid excessive displacement of the diaphragm 2 and prevent it from being difficult to reset. In addition, the matching groove 11 is formed on the extension portion 13 , which can reduce the space occupied on the tablet body 12 , increase the space of the opening 121 , and improve the surface utilization rate of the tablet body 12 .

[0052] Optionally, combined Figure 2 A groove 203 is formed on the top cover 202, and the diaphragm 2 and the pressing plate 1 can be arranged in the groove 203, and the exhaust hole 201 passes through the bottom wall of the groove 203. Therefore, the groove 203 can be used to accommodate the diaphragm 2 and the pressing plate 1, so as to facilitate the matching of the valve 100 and the cylinder 200. In addition, the matching of the valve 100 and the cylinder 200 can also be made compact and convenient to use.

[0053] According to other embodiments of the utility model, the valve 100 further includes a valve body (not shown in the figure), which is arranged on the side of the diaphragm 2 away from the pressing plate 1, and the valve body is suitable for being connected to the cylinder 200. A through hole (not shown in the figure) is formed on the valve body, and the through hole is suitable for being opposite to the exhaust hole 201.

[0054] Figure 1 The example in the figure is that the pressing piece 1 can be directly connected to the top cover 202 of the cylinder 200, but it is not limited thereto. For example, when the valve includes a valve body, a through hole is formed on the valve body, the through hole is connected to the exhaust hole 201, the valve body is connected to the pressing piece 1, the diaphragm 2 is located between the valve body and the pressing piece 1, the stopper 23 can cover the through hole, and the diaphragm 2 can move to open and close the through hole. When the valve 100 is used, it can be connected to the cylinder 200 through the valve body. When the air pressure in the cylinder 200 increases, the gas flows into the valve 100 through the exhaust hole 201 and the through hole in turn, and acts on the stopper 23 to push the stopper 23 to separate from the through hole, and then the gas in the through hole is discharged through the exhaust channel 231 and the opening 121 on the pressing piece 1. As the air pressure in the cylinder 200 decreases, under the elastic force of the elastic part 22 and the gravity of the diaphragm 2 itself, the diaphragm 2 is reset and pressed on the through hole to close the valve 100. When the piston (not shown) of the cylinder 200 continues to be pulled out, negative pressure is formed in the cylinder 200, and the diaphragm 2 is subjected to a pressure difference force in the opposite direction to the original direction, which presses the diaphragm 2 against the through hole, preventing the high-pressure gas from flowing back into the cylinder 200 through the through hole and the exhaust hole 201.

[0055] An air compressor (not shown) according to an embodiment of the second aspect of the utility model comprises a valve 100 according to the embodiment of the first aspect.

[0056] The air compressor according to the embodiment of the utility model adopts the above-mentioned valve 100, which is beneficial to the normal use of the air compressor, improves the performance and reliability of the air compressor, and prolongs the service life.

[0057] The valve 100, the cylinder 200 and other structures and operations of the air compressor according to the embodiment of the utility model are well known to those skilled in the art and will not be described in detail here.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A valve, characterized in that: include: A pressing sheet, the pressing sheet being adapted to be connected to the cylinder, and having at least one matching groove formed on a surface of the pressing sheet facing the cylinder; The diaphragm comprises a movable section and a matching section connected to each other, the movable section is suitable for being movably arranged between the pressing plate and the cylinder to open or close the exhaust hole of the cylinder, the free end surface of the matching section protrudes from the outer peripheral surface of the movable section, and the matching section can be movably matched in the matching groove.

2. The valve according to claim 1, characterized in that The bottom wall of the matching groove extends obliquely from the edge of the pressing sheet toward the center toward the direction away from the diaphragm.

3. The valve according to claim 1, characterized in that The matching section horizontally extends radially outward from the outer circumferential surface of the movable section.

4. The valve according to claim 1, characterized in that The matching grooves are formed in plurality, and the matching grooves are arranged at intervals along the circumference of the pressing sheet. There are a plurality of the mating segments, and the plurality of the mating segments are arranged at intervals along the circumference of the movable segment, and the plurality of the mating segments are respectively mated in a plurality of the mating grooves.

5. The valve according to claim 4, characterized in that The activity segment includes: an elastic portion, wherein the matching section is connected to an outer peripheral surface of the elastic portion; A stopper portion, wherein the stopper portion is connected to the elastic portion, the stopper portion is located radially inward of the elastic portion, the stopper portion and the elastic portion jointly define an exhaust channel, the stopper portion is suitable for being opposite to the exhaust hole, and when the diaphragm closes the exhaust hole, the stopper portion covers the exhaust hole.

6. The valve according to claim 5, characterized in that The elastic portion comprises: A first elastic portion, the first elastic portion is bent and extends along the circumference of the pressing sheet; Two second elastic parts, one end of each of the two second elastic parts is connected to the two ends of the first elastic part respectively, and the other ends of each of the two second elastic parts are close to each other and extend along the circumference of the pressing sheet; A third elastic portion, one end of the third elastic portion is connected to the stop portion, the other end of the third elastic portion extends radially outward to be respectively connected to the other ends of the two second elastic portions, and the other end of the third elastic portion smoothly transitions to the other end of the second elastic portion.

7. The valve according to claim 6, characterized in that The plurality of matching sections are respectively connected to two ends of the first elastic portion.

8. The valve according to claim 5, characterized in that The hardness of the stopping portion is greater than the hardness of the elastic portion.

9. The valve according to any one of claims 1 to 8, characterized in that Further including: A valve body is arranged on a side of the diaphragm away from the pressing plate, the valve body is suitable for being connected to the cylinder, a through hole is formed on the valve body, and the through hole is suitable for being opposite to the exhaust hole.

10. An air compressor, characterized in that: Comprising a valve according to any one of claims 1-9.

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