Valve plate assembly, compression air cylinder and compression device

Abstract

The utility model relates to a valve plate assembly, a compression air cylinder and a compression device.The valve plate assembly comprises a valve plate, a first valve block, a pressing plate and a second valve block, the valve plate is provided with a first mounting groove, a second mounting groove, a first air channel and a second air channel, the first valve block is arranged in the first mounting groove, and when air flow passes through the first air channel and flows from the side, back on to the first valve block, of the valve plate to the other side, the first valve plate is arranged in the first mounting groove, the part of the first valve plate deforms to open the first air channel, the pressing plate is arranged in the second mounting groove, the second valve plate is clamped between the valve plate and the pressing plate, and when airflow flows towards the second air channel through the third air channel, the part of the second valve plate deforms to open the third air channel. According to the valve plate assembly, the compression air cylinder and the compression device, the first installation groove and the second installation groove in the valve plate are used for providing installation spaces for the first valve plate and the second valve plate correspondingly, and therefore when the valve plate is installed on the cylinder body of the compression air cylinder, installation of the first valve plate and the second valve plate does not occupy the volume space in the cylinder body, and the compression efficiency is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a valve plate assembly, a compression cylinder and a compression device. Background Art

[0002] A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. In a compressor, the reciprocating motion of a piston in a cylinder is usually used to pump and compress fluid, so an air valve is needed to adjust the opening and closing of the air path.

[0003] In the related art, the installation of the valve plate of the air valve will occupy the volume space in the cylinder body, resulting in a decrease in the volumetric efficiency in the cylinder body. The movement of the piston in the cylinder body will be affected by the installation structure of the valve plate and cannot fully utilize the volume space, thereby affecting the compression efficiency of the reciprocating motion of the piston in the cylinder body. Summary of the invention

[0004] Based on this, it is necessary to provide a valve plate assembly, a compression cylinder and a compression device to address the problem that the installation of the valve plate occupies volume space and leads to low compression efficiency.

[0005] In one aspect, the present application provides a valve plate assembly, comprising:

[0006] The valve plate is provided with a first mounting groove, a second mounting groove, a first air channel and a second air channel, wherein the first air channel penetrates to the bottom of the first mounting groove, and the second air channel penetrates to the bottom of the second mounting groove;

[0007] a first valve plate, disposed in the first mounting groove, wherein a portion of the first valve plate closes the first air passage, and when air flows through the first air passage from one side of the valve plate facing away from the first valve plate to the other side, a portion of the first valve plate corresponding to the first air passage is deformed to open the first air passage;

[0008] A pressing plate, arranged in the second mounting groove, the pressing plate is provided with a third air passage;

[0009] The second valve sheet is sandwiched between the valve plate and the pressure plate. Part of the structure of the second valve sheet closes the third airway. When the air flows through the third airway toward the second airway, the part of the second valve sheet corresponding to the third airway is deformed to open the third airway.

[0010] In one embodiment, the first valve plate and the second valve plate each include a covering portion and an elastic portion, both sides of the elastic portion are separated from the covering portion by a separation groove, both ends of the elastic portion are connected to the covering portion, and the elastic portion can be elastically deformed relative to the covering portion under the thrust of the airflow.

[0011] In one embodiment, at least one of the first air channel, the second air channel and the third air channel is an arc-shaped groove; and / or the elastic portion is fan-shaped.

[0012] In one embodiment, the depth of the first mounting groove is greater than or equal to the thickness of the first valve sheet; and / or, an air avoidance groove is provided at the bottom of the second mounting groove, the second air duct penetrates to the bottom of the air avoidance groove, and the position of the air avoidance groove in the second mounting groove corresponds to the portion of the second valve sheet that is deformed.

[0013] In one embodiment, a first sealing ring is provided around the first valve plate, and the first sealing ring is sealingly abutted against the side wall of the first mounting groove; and / or a second sealing ring is provided around the pressure plate or the second valve plate, and the second sealing ring is sealingly abutted against the side wall of the second mounting groove.

[0014] On the other hand, the present application provides a compression cylinder, comprising a cylinder body, a piston and a valve plate assembly as described above, wherein the cylinder body has a volume chamber, the piston is disposed in the volume chamber, and when the piston reciprocates in the volume chamber, the first valve plate and the second valve plate are alternately deformed so that the first air channel and the third air channel are alternately opened.

[0015] In one embodiment, the compression cylinder also includes a first shell, which is connected to one side of the cylinder body, and has a first air inlet and a first air outlet. The valve plate assembly is sandwiched between the cylinder body and the first shell. When the piston moves in a first direction relative to the cylinder body, the first air inlet pumps gas into the volume chamber through the first air channel. When the piston moves in a second direction relative to the cylinder body, the piston discharges the gas in the volume chamber from the first air outlet through the second air channel and the third air channel. The first direction is opposite to the second direction.

[0016] In one embodiment, the cylinder body is sealed with the valve plate, and the first housing is sealed with the valve plate and / or the cylinder body.

[0017] In one embodiment, the compression cylinder further includes a first shell and a second shell, the first shell and the second shell are respectively connected to the two sides of the cylinder body, the piston divides the volume chamber into a first volume chamber and a second volume chamber, the first volume chamber is located between the first shell and the piston, and the second volume chamber is located between the second shell and the piston; wherein the first shell has a first air inlet and a first air outlet, the second shell has a second air inlet and a second air outlet, the compression cylinder includes two groups of valve plate assemblies, the two groups of valve plate assemblies are respectively a first valve plate assembly and a second valve plate assembly, the first valve plate assembly is clamped between the cylinder body and the first shell, and the second The valve plate assembly is clamped between the cylinder body and the second shell; when the piston moves in a first direction relative to the cylinder body, the first air inlet pumps gas into the first cavity through the first air channel of the first valve plate assembly, and the piston discharges the gas in the second cavity from the second air outlet through the second air channel and the third air channel of the second valve plate assembly; when the piston moves in a second direction relative to the cylinder body, the second air inlet pumps gas into the second cavity through the first air channel of the second valve plate assembly, and the piston discharges the gas in the first cavity from the first air outlet through the second air channel and the third air channel of the first valve plate assembly, and the first direction is opposite to the second direction.

[0018] On the other hand, the present application provides a compression device, including a reciprocating mechanism and a compression cylinder as described above, wherein the reciprocating mechanism is used to drive the piston to perform reciprocating motion in the volume chamber.

[0019] The above-mentioned valve plate assembly, compression cylinder and compression device utilize the first mounting groove and the second mounting groove on the valve plate to provide installation space for the first valve plate and the second valve plate respectively, so that when the valve plate is installed on the cylinder body of the compression cylinder, the installation of the first valve plate and the second valve plate will not occupy the volume space in the cylinder body, so that the piston of the compression cylinder can fully utilize the volume space of the cylinder body for reciprocating motion, thereby ensuring the compression efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying any creative work.

[0021] FIG. 1 is a schematic diagram of an exploded structure of a valve plate assembly in one embodiment of the present application.

[0022] FIG2 is a schematic diagram of the cross-sectional structure of a compression cylinder in one embodiment of the present application, and the dotted arrows in the figure indicate the air path when the compression cylinder is intake.

[0023] FIG. 3 is a schematic diagram of the gas path of the compression cylinder shown in FIG. 2 during exhaust.

[0024] FIG. 4 is a schematic structural diagram of a first shell of a compression cylinder in one embodiment of the present application.

[0025] FIG5 is a schematic structural diagram of a compression cylinder in another embodiment of the present application.

[0026] FIG. 6 is a schematic diagram of the explosion structure of the compression cylinder shown in FIG. 5 .

[0027] FIG. 7 is a perspective schematic diagram of the cross-sectional structure of a compression cylinder in one embodiment of the present application.

[0028] FIG8 is a schematic cross-sectional view of a compression device in another embodiment of the present application.

[0029] FIG. 9 is a schematic structural diagram of the compression device shown in FIG. 8 when the piston is located at another position.

[0030] FIG. 10 is a schematic diagram of the assembly structure of the reciprocating mechanism of the compression device in one embodiment of the present application.

[0031] FIG. 11 is a schematic diagram of an exploded structure of a reciprocating mechanism of a compression device in one embodiment of the present application.

[0032] 12 is a schematic diagram of the arrangement positions of the first rolling member and the second rolling member of the reciprocating mechanism relative to the reciprocating body in the compression device in one embodiment of the present application.

[0033] FIG. 13 is a schematic structural diagram of a rotating transmission member of a reciprocating mechanism in a compression device in one embodiment of the present application.

[0034] FIG. 14 is a schematic structural diagram from another perspective of a rotating transmission member of a reciprocating mechanism in a compression device in one embodiment of the present application.

[0035] Description of Figure Numbers:

[0036] 100, valve plate assembly; 100a, first valve plate assembly; 100b, second valve plate assembly; 1, valve plate; 1a, first mounting groove; 1b, second mounting groove; 1c, first air passage; 1d, second air passage; 1e, air avoidance groove; 2, first valve plate; 3, pressure plate; 3a, third air passage; 4, second valve plate; T, covering part; Q, elastic part; G, separation groove; 5, first sealing ring; 6, second sealing ring; 1001, compression cylinder; 101, cylinder body; 1011, Volume cavity; 1011a, first cavity; 1011b, second cavity; 1012, heat dissipation fin; 102, piston; 103, piston rod; 104, first shell; 104a, first air inlet; 104b, first air outlet; 104c, air inlet cavity; 104d, exhaust cavity; 104e, partition; 105, first sealing member; 106, second sealing member; 107, third sealing member; 108, second shell; 108a, second air inlet; 108b, second air outlet; 1001a, first direction; 1001b, second direction; 1002, reciprocating mechanism; 10a, base; 11, rotating transmission member; 11a, first guide groove; 11b, second guide groove; 111, mounting hole; 112, cam; 12, reciprocating body; 12a, first mounting portion; 12b, second mounting portion; 12c, linear bearing; 121, mounting groove; 122, ball sleeve; 123, ball; 124, cover; 13, first rolling member; 1 4. Second rolling member; 14a. First plane bearing; 14b. Second plane bearing; 14c. First rolling bearing; 14d. Second rolling bearing; 141. Through hole; 141a. Narrowing section; 141b. First step groove; 141c. Second step groove; 15. Housing; 15a. Shaft hole; 16. Guide assembly; 16a. Guide rod; 17. Rotating member; 171. Rotating disk; 172. Rotating shaft; 18. Bushing; 19. Gray ring; 1000. Compression device. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] Referring to FIG. 1 , a valve plate assembly 100 is provided in one embodiment of the present application, and the valve plate assembly 100 can be used to close and open the airway. For example, in conjunction with FIG. 2 , FIG. 2 shows a schematic diagram of a structure in which a valve plate assembly 100 in one embodiment of the present application is provided in a compression cylinder 1001. The valve plate assembly 100 can be provided between a cylinder body 101 of the compression cylinder 1001 and a housing (such as a first housing 104) provided with an air port.

[0043] The valve plate assembly 100 includes a valve plate 1, a first valve disc 2, a pressure plate 3 and a second valve disc 4. The valve plate 1 is provided with a first mounting groove 1a, a second mounting groove 1b, a first air channel 1c and a second air channel 1d. The first air channel 1c penetrates to the bottom of the first mounting groove 1a, and the second air channel 1d penetrates to the bottom of the second mounting groove 1b. The first valve disc 2 is arranged in the first mounting groove 1a, so that when the first valve disc 2 covers the first air channel 1c located at the bottom of the first mounting groove 1a, the first valve disc 2 can close the first air channel 1c; accordingly, when the first valve disc 2 releases the covering of the first air channel 1c, the first air channel 1c will not be blocked by the first valve disc 2 and will be in an open state. The pressure plate 3 is arranged in the second mounting groove 1b, and the pressure plate 3 is provided with a third air channel 3a. It can be understood that if no other structure is provided between the pressure plate 3 and the valve plate 1, the pressure plate 3 provided in the second mounting groove 1b will be connected to the second air channel 1d at the bottom of the second mounting groove 1b because the third air channel 3a is exposed to the second mounting groove 1b. The second valve plate 4 is sandwiched between the valve plate 1 and the pressure plate 3, whereby the second valve plate 4 can close the third air channel 3a by covering the third air channel 3a to block the communication between the third air channel 3a and the second air channel 1d; accordingly, when the second valve plate 4 releases the covering of the third air channel 3a, the third air channel 3a will open to communicate with the second air channel 1d. Therefore, in the valve plate assembly 100 of the embodiment of the present application, the first valve plate 2 can realize the closing and opening of the first air channel 1c, and the second valve plate 4 can realize the closing and opening of the third air channel 3a.

[0044] It should be noted that the first valve plate 2 and the second valve plate 4 achieve the closing and opening of the corresponding channels by deforming due to the driving force of the airflow in the air path, so that the opening and closing effect can be achieved without the need for electrical control. In this embodiment, a partial structure of the first valve plate 2 closes the first airway 1c, and when the air flows through the first airway 1c from the side of the valve plate 1 facing away from the first valve plate 2 to the other side, the portion of the first valve plate 2 corresponding to the first airway 1c is deformed to open the first airway 1c. A partial structure of the second valve plate 4 closes the third airway 3a, and when the air flows through the third airway 3a toward the second airway 1d, the portion of the second valve plate 4 corresponding to the third airway 3a is deformed to open the third airway 3a.

[0045] Since in the valve plate assembly 100 of the embodiment of the present application, the first mounting groove 1a and the second mounting groove 1b on the valve plate 1 provide mounting space for the first valve plate 2 and the second valve plate 4 respectively, the first valve plate 2 and the second valve plate 4 can remain flat relative to the valve plate 1. Therefore, when the valve plate 1 is installed in the cylinder body 101 of the compression cylinder 1001, the installation of the first valve plate 2 and the second valve plate 4 will not occupy the volume space in the cylinder body 101, so that the piston 102 of the compression cylinder 1001 can fully utilize the volume space of the cylinder body 101 for reciprocating motion, so as to ensure the compression efficiency.

[0046] Continuing to refer to FIG. 1 , the first valve disc 2 and the second valve disc 4 both include a covering portion T and an elastic portion Q, wherein the elastic portion Q is a portion of the first valve disc 2 and the second valve disc 4 for generating deformation, and its setting position corresponds to the airway to be closed. Both sides of the elastic portion Q are separated from the covering portion T by a separation groove G, and both ends of the elastic portion Q are connected to the covering portion T, and the elastic portion Q can be elastically deformed relative to the covering portion T under the thrust of the airflow. Through this structural setting, when the elastic portion Q is elastically deformed, the two ends of the elastic portion Q will be pulled by the covering portion T without a large movement, so as to reduce the impact force of the elastic portion Q in the process of opening and closing the corresponding airway, thereby reducing the hitting noise.

[0047] At least one of the first air passage 1c, the second air passage 1d and the third air passage 3a is an arc-shaped groove. Therefore, when the valve plate assembly 100 is assembled to the cylinder body 101 of the compression cylinder 1001, the arc-shaped groove can correspond to the cylindrical volume cavity 1011 of the cylinder body 101, so that a narrow and long communication area can be obtained, which is conducive to the uniformity of the flow of the airflow.

[0048] The elastic part Q is fan-shaped, so when the elastic part Q is deformed by the thrust of the airflow, the fan-shaped elastic part Q can be easily stretched away from the corresponding airway and flipped to a certain extent. Therefore, the effect of the elastic part Q leaving the corresponding airway to open the corresponding airway can be optimized.

[0049] In some embodiments, the depth of the first mounting groove 1a is greater than or equal to the thickness of the first valve plate 2, so that after the first valve plate 2 is installed in the first mounting groove 1a, the surface of the first valve plate 2 will not protrude from the surface of the valve plate 1 where the first mounting groove 1a is opened. In this way, after the valve plate assembly 100 is installed in the cylinder body 101 of the compression cylinder 1001, the piston 102 can move to a position against the valve plate 1 if its range of motion allows, without being interfered by the first valve plate 2. It should be noted here that the first valve plate 2 can be bonded to the valve plate 1 by glue, or connected to the valve plate 1 by hot pressing. The connection method between the first valve plate 2 and the valve plate 1 is not limited here.

[0050] Continuing to refer to FIG. 1 , the bottom of the second mounting groove 1b is provided with an air-avoiding groove 1e, and the second air passage 1d penetrates to the bottom of the air-avoiding groove 1e. The position of the air-avoiding groove 1e in the second mounting groove 1b corresponds to the portion where the second valve plate 4 is deformed. In this embodiment, the air-avoiding groove 1e is used to provide an air-avoiding space for the deformation of the second valve plate 4, thereby facilitating the maintenance of the deformation of the second valve plate 4, so as to improve the efficiency of the second valve plate 4 in opening the third air passage 3a.

[0051] Continuing with reference to FIG1 , a first sealing ring 5 is provided around the first valve plate 2, and the first sealing ring 5 is sealed against the side wall of the first mounting groove 1a, so that the first sealing ring 5 is utilized to enhance the air tightness between the periphery of the first valve plate 2 and the side wall of the first mounting groove 1a, thereby reducing the probability of air leakage and improving the sealing effect of the first valve plate 2 when closing the first air passage 1c.

[0052] A second sealing ring 6 is provided around the pressure plate 3 or the second valve plate 4, and the second sealing ring 6 is sealed and abutted against the side wall of the second mounting groove 1b, so that the second sealing ring 6 is used to enhance the air tightness between the pressure plate 3 or the second valve plate 4 and the side wall of the second mounting groove 1b, reduce the probability of air leakage, and improve the sealing effect when the second valve plate 4 closes the third air channel 3a.

[0053] As shown in combination with FIG. 2 and FIG. 3 , another embodiment of the present application provides a compression cylinder 1001, comprising a cylinder body 101, a piston 102, and a valve plate assembly 100 as described above. The cylinder body 101 has a volume chamber 1011, and the piston 102 is disposed in the volume chamber 1011. When the piston 102 reciprocates in the volume chamber 1011, the first valve plate 2 and the second valve plate 4 are deformed alternately, so that the first air channel 1c and the third air channel 3a are opened alternately. In this embodiment, the first valve plate 2 and the second valve plate 4 are used to realize the alternate opening of the first air channel 1c and the third air channel 3a, so as to realize the cycle of pumping and exhausting in the air path during the reciprocating movement of the piston 102 in the volume chamber 1011, so that the compression cylinder 1001 can achieve the effect of pumping and compressing the air flow.

[0054] It should be noted that the compression cylinder 1001 has air holes for air intake and air exhaust. For ease of understanding, the working principle of the compression cylinder 1001 will be further described below in conjunction with its structure.

[0055] Continuing with FIG. 2 and FIG. 3 , the compression cylinder 1001 further includes a first housing 104, which is connected to one side of the cylinder body 101. The first housing 104 has a first air inlet 104a and a first air outlet 104b, and a valve plate assembly 100 is sandwiched between the cylinder body 101 and the first housing 104. In this embodiment, when the piston 102 moves relative to the cylinder body 101 in a first direction 1001a, the first air inlet 104a pumps gas into the volume chamber 1011 through the first air channel 1c, and when the piston 102 moves relative to the cylinder body 101 in a second direction 1001b, the piston 102 discharges the gas in the volume chamber 1011 from the first air outlet 104b through the second air channel 1d and the third air channel 3a, and the first direction 1001a is opposite to the second direction 1001b. In this embodiment, the first air inlet 104a and the first air channel 1c constitute an air inlet path for pumping gas into the volume chamber 1011, and the second air channel 1d, the third air channel 3a and the first air outlet 104b constitute an exhaust path for exhausting the gas from the volume chamber 1011. During the reciprocating motion of the piston 102, i.e., when the piston 102 moves in the first direction 1001a and the second direction 1001b, the air inlet path and the exhaust path are alternately opened with the piston 102 in one reciprocating cycle, thereby ensuring that the gas will not leak from the exhaust path when the volume chamber 101 of the cylinder body 101 is inhaled, and the gas in the volume chamber 1011 of the cylinder body 101 will not leak from the air inlet path when it is discharged from the exhaust path. Therefore, during the continuous reciprocating motion of the piston 102 in multiple reciprocating cycles, the compression cylinder 1001 can periodically inhale and exhaust air to achieve compression work.

[0056] The cylinder body 101 is sealed with the valve plate 1, and the first shell 104 is sealed with the valve plate 1 and / or the cylinder body 101. As shown in FIG2 and FIG3, a first seal 105 is provided between the cylinder body 101 and the valve plate 1, and a second seal 106 and a third seal 107 are provided between the first shell 104 and the valve plate 1, wherein the second seal 106 is used to seal the first shell 104 and the valve plate 1 in the intake air path, and the third seal 107 is used to seal the first shell 104 and the valve plate 1 in the exhaust air path, that is, through the second seal 106 and the third seal 107, the airtight barrier between the intake air path and the exhaust air path can be achieved, so that when the compression cylinder 1001 is working, the intake air path and the exhaust air path do not interfere with each other during the suction link and the exhaust link. It should be noted that the first seal 105 can be an O-ring sandwiched between the cylinder body 101 and the valve plate 1.

[0057] As shown in FIG. 4 , in some embodiments, the first shell 104 is formed with an air inlet cavity 104c and an exhaust cavity 104d. The first air inlet 104a is in communication with the air inlet cavity 104c, and the first air outlet 104b is in communication with the exhaust cavity 104d. The air inlet cavity 104c and the exhaust cavity 104d may be separated and formed by a partition 104e in the first shell 104. When the valve plate 1 is matched with the first shell 104, the valve plate 1 covers the end surface of the first shell 104 on the side where the air inlet cavity 104c and the exhaust cavity 104d are located, and the second sealing member 106 and the third sealing member 107 between the valve plate 1 and the first shell 104 correspond to the air inlet cavity 104c and the exhaust cavity 104d, respectively, so that the air inlet cavity 104c and the exhaust cavity 104d are not in communication with each other between the valve plate 1 and the first shell 104.

[0058] The second sealing member 106 and the third sealing member 107 may be an integrally formed structure, thereby simplifying the assembly steps.

[0059] The shape of the first seal 105 can be triangular, fan-shaped or circular, and the shape of the second seal 106 can be triangular, fan-shaped or circular. When the first seal 105 and the second seal 106 are fan-shaped, it is helpful to simplify the processing of the first shell 104 and maintain the structural strength of the first shell 104. For example, the side of the first shell 104 facing the valve plate 1 is set to be circular, wherein the shape of the air inlet cavity 104c and the exhaust cavity 104d on the end surface corresponding to the first shell 104 is fan-shaped.

[0060] The shapes of the second sealing member 106 and the third sealing member 107 can be set to other shapes according to shape design requirements, which are not limited here.

[0061] As shown in combination with Figures 5 to 7, in another embodiment, the compression cylinder 1001 includes a first shell 104 and a second shell 108. The first shell 104 and the second shell 108 are respectively connected to the two sides of the cylinder body 101. The piston 102 divides the volume chamber 1011 into a first volume chamber 1011a and a second volume chamber 1011b, the first volume chamber 1011a is located between the first shell 104 and the piston 102, and the second volume chamber 1011b is located between the second shell 108 and the piston 102.

[0062] In this embodiment, as shown in FIG. 7 , the first housing 104 has a first air inlet 104 a and a first air outlet 104 b , the second housing 108 has a second air inlet 108 a and a second air outlet 108 b , and the compression cylinder 1001 includes two sets of valve plate assemblies 100 .

[0063] For the convenience of description, the two valve plate assemblies 100 are respectively referred to as a “first valve plate assembly 100 a ” and a “second valve plate assembly 100 b ”.

[0064] The first valve plate assembly 100 is sandwiched between the cylinder body 101 and the first housing 104 , and the second valve plate assembly 100 is sandwiched between the cylinder body 101 and the second housing 108 .

[0065] When the piston 102 moves in the first direction 1001a relative to the cylinder body 101, the first air inlet 104a pumps gas into the first cavity 1011a through the first air channel 1c of the first valve plate assembly 100a, and the piston 102 discharges the gas in the second cavity 1011b from the second air outlet 108b through the second air channel 1d and the third air channel 3a of the second valve plate assembly 100b.

[0066] When the piston 102 moves toward the second direction 1001b relative to the cylinder body 101, the second air inlet 108a pumps gas into the second cavity 1011b through the first air channel 1c of the second valve plate assembly 100b, and the piston 102 discharges the gas in the first cavity 1011a from the first air outlet 104b through the second air channel 1d and the third air channel 3a of the first valve plate assembly 100a. The first direction 1001a is opposite to the second direction 1001b.

[0067] Under the above-mentioned structural setting, no matter whether the piston 102 moves in the first direction 1001a or the second direction 1001b, compression work can be achieved, thereby effectively improving the compression efficiency.

[0068] It should be noted that the structures of the first shell 104 and the second shell 108 are substantially the same, and the structure of the second shell 108 will not be described in detail herein.

[0069] 8 and 9 , based on the above compression cylinder 1001, another embodiment of the present application provides a compression device 1000. The compression device 1000 includes the compression cylinder 1001 in any of the above embodiments, and also includes a reciprocating mechanism 1002. The reciprocating mechanism 1002 is used to drive the piston 102 to reciprocate in the volume chamber 1011.

[0070] The reciprocating mechanism 1002 may be any structure capable of driving the piston 102 to reciprocate in the volume chamber 1011. For example, in some embodiments, the piston 102 is connected to a piston rod 103 and is connected to the reciprocating mechanism 1002 through the piston rod 103. The reciprocating mechanism 1002 drives the piston rod 103 to reciprocate relative to the cylinder body 101, so that the piston 102 reciprocates in the volume chamber 1011 of the cylinder body 101 driven by the piston rod 103. The reciprocating mechanism 1002 includes, but is not limited to, a belt drive structure, a worm gear drive structure, or a cam drive structure, as long as the piston rod 103 can reciprocate relative to the cylinder body 101.

[0071] It should be noted that the compression cylinder 1001 is correspondingly provided with a through hole for the piston rod 103 to penetrate the volume chamber 1011, so that the piston rod 103 can be connected to the piston 102 located in the volume chamber 1011. It should be noted here that when the piston rod 103 is connected to the side of the piston 102 facing the valve plate assembly 100, the valve plate 1 in the valve plate assembly 100 is provided with a through hole. In the embodiment where the valve plate assembly 100 is provided on both sides of the cylinder body 101, it is only necessary to open a through hole in the valve plate 1 of the valve plate assembly 100 where the piston rod 103 needs to penetrate, and the valve plate assembly 100 on the other side does not need to meet the penetration requirement of the valve plate assembly 100, so there is no need to set a through hole.

[0072] Taking the piston rod 103 passing through the first housing 104 and the valve plate 1 of the first valve plate assembly 100a as an example, the first housing 104 and the valve plate 1 of the first valve plate assembly 100a are provided with perforations at corresponding positions, so that one end of the piston rod 103 can pass through the perforations to the volume chamber 1011, so that one end of the piston rod 103 can be connected to the piston 102 located in the volume chamber 1011. The connection method between the piston rod 103 and the piston 102 includes but is not limited to a clamping connection or a threaded connection.

[0073] Continuing with FIG. 7 , a sealing structure such as a bushing 18 or a Gly ring 19 may be provided at the position where the piston rod 103 passes through the valve plate 1 and the first housing 104 to seal the volume chamber 1011 , so that the volume chamber 1011 has good air tightness.

[0074] The reciprocating mechanism 1002 may also adapt to the reciprocating motion of the piston 102 by adopting a structure that converts the rotational motion of one structural member into the linear reciprocating motion of another structural member.

[0075] Heat dissipation fins 1012 may be provided on the periphery of the cylinder body 101 so that the heat generated by the piston 102 when moving in the volume chamber 1011 of the cylinder body 101 can be dissipated in time, thereby preventing the compression cylinder 1001 from being damaged due to excessive temperature.

[0076] For ease of understanding, the structure of the reciprocating mechanism 1002 in the compression device 1000 of some of the embodiments will be described below in conjunction with Figures 10 to 14.

[0077] As shown in combination with FIG. 10 and FIG. 11 , in some embodiments, the reciprocating mechanism 1002 includes a rotating transmission member 11, a reciprocating body 12, a first rolling member 13, and a second rolling member 14. The circumferential surface of the rotating transmission member 11 is provided with a first guide groove 11a and a second guide groove 11b. The first guide groove 11a and the second guide groove 11b are arranged at intervals along the axial direction of the rotating transmission member 11, and the trajectories are closed curves that surround the rotating transmission member 11. The reciprocating body 12 is provided with a relatively fixed first mounting portion 12a and a second mounting portion 12b. The first mounting portion 12a and the second mounting portion 12b are used to mount the first rolling member 13 and the second rolling member 14, respectively. It is understandable that the first mounting portion 12a can be multiple, so as to meet the need of mounting multiple first rolling members 13. Correspondingly, the second mounting portion 12b can be multiple, so as to meet the need of mounting multiple second rolling members 14.

[0078] The first rolling member 13 is arranged on the first mounting portion 12a and matches with the first guide groove 11a. The second rolling member 14 is arranged on the second mounting portion 12b and matches with the second guide groove 11b. The first rolling member 13 and the first guide groove 11a are rolling matched, and the second rolling member 14 and the second guide groove 11b are rolling matched, so that the friction force when the first rolling member 13 moves along the first guide groove 11a and the friction force when the second rolling member 14 moves along the second guide groove 11b can be reduced, thereby improving the smoothness of the reciprocating motion of the reciprocating body 12 in the reciprocating mechanism 1002.

[0079] As shown in combination with FIG. 12 and FIG. 13 , the closed curve has crests and troughs staggered in the axial and circumferential directions of the rotary transmission member 11, and the crests in the trajectory of the first guide groove 11a and the crests in the trajectory of the second guide groove 11b are staggered in the circumferential direction of the rotary transmission member 11. Therefore, during the rotation of the rotary transmission member 11, the first rolling member 13 moving along the first guide groove 11a and the second rolling member 14 moving along the second guide groove 11b can respectively play a stabilizing supporting effect at different positions on the circumferential side of the corresponding rotary transmission member 11, so that the reciprocating body 12 driven by the first rolling member 13 and the second rolling member 14 can move more stably in the axial direction.

[0080] In this embodiment, when the rotary transmission member 11 rotates, the first rolling member 13 moves along the first guide groove 11a, and the second rolling member 14 moves along the second guide groove 11b. The displacement changes of the first rolling member 13 and the second rolling member 14 in the axial direction of the rotary transmission member 11 are equal, so that the axial driving steps of the first rolling member 13 and the second rolling member 14 on the rotary transmission member 11 are coordinated and consistent, reducing the probability of the rotary transmission member 11 being stuck, so as to improve the reliability of the reciprocating motion.

[0081] As shown in Figures 13 and 14, the trajectories of the first guide groove 11a and the second guide groove 11b are both sinusoidal waves with the same amplitude. In this way, the trajectories of the first guide groove 11a and the second guide groove 11b are sinusoidal curves. On the one hand, this arrangement ensures that the first guide groove 11a and the second guide groove 11b respectively guide the periodic movement of the first rolling element 13 and the second rolling element 14 to achieve the reciprocating motion of the reciprocating body 12. On the other hand, with this structural design, the trajectories of the first rolling element 13 and the second rolling element 14 when rolling along the first guide groove 11a and the second guide groove 11b are relatively smooth, thereby avoiding situations such as ball jumping or jamming. Since the amplitudes of the sinusoidal waves corresponding to the trajectories of the first guide groove 11a and the second guide groove 11b are the same, it is only necessary to set the first rolling member 13 and the second rolling member 14 at the peak position or the trough position of the first guide groove 11a and the second guide groove 11b respectively, so that when the rotating transmission member 11 rotates, the displacement change of the first rolling member 13 along the first guide groove 11a in the axial direction of the rotating transmission member 11 is consistent with the displacement change of the second rolling member 14 along the second guide groove 11b in the axial direction of the rotating transmission member 11. Therefore, this structural setting is conducive to determining the installation position of the first rolling member 13 and the second rolling member 14 relative to the rotating transmission member 11, making the assembly of the reciprocating mechanism 1002 more convenient.

[0082] It should be noted that the number of peaks and troughs in the trajectory of the first guide groove 11a and the second guide groove 11b are equal. Specifically, the number of peaks in the trajectory of the first guide groove 11a is equal to the number of troughs in the trajectory of the first guide groove 11a, and the number of peaks in the trajectory of the second guide groove 11b is the same as the number of troughs in the trajectory of the second guide groove 11b, and is consistent with the number of peaks in the trajectory of the first guide rail. In this embodiment, in the axial direction of the rotating transmission member 11, the peaks in the trajectory of the first guide groove 11a are directly opposite to the troughs in the trajectory of the second guide groove 11b. In this way, when the first rolling member 13 is located at the trough position of the first guide groove 11a, the second rolling member 14 is located at the trough position of the second guide groove 11b, and the first rolling member 13 and the second rolling member 14 are staggered from each other in the circumferential direction of the rotating transmission member 11.

[0083] In the embodiment of the present application, the first rolling member 13 and the second rolling member 14 are staggered with respect to the circumferential direction of the rotating transmission member 11, which means that the line connecting the first rolling member 13 and the second rolling member 14 is not parallel to the center line of the rotating transmission member 11. In other words, the positions of the first rolling member 13 and the second rolling member 14 in the circumferential direction of the corresponding rotating transmission member 11 are different.

[0084] In some embodiments, the number of the first rolling elements 13 and the number of the second rolling elements 14 are both 2, and the connecting line of the two first rolling elements 13 and the connecting line of the two second rolling elements 14 are perpendicular to the center line of the rotating transmission member 11. In this embodiment, the two first rolling elements 13 and the two second rolling elements 14 can realize the support and positioning between the reciprocating body 12 and the rotating transmission member 11 in two perpendicular directions perpendicular to the center line of the rotating transmission member 11, so that the reciprocating body 12 can move smoothly in the axial direction driven by the rotating transmission member 11 and is not easy to shake in the radial direction, so that the reciprocating body 12 can maintain good motion stability in the axial direction of the rotating transmission member 11.

[0085] Referring again to FIG. 11 , the reciprocating mechanism 1002 further includes a base 10a, a box 15, and a guide assembly 16. The box 15 is connected to the base 10a to enclose an activity space, and the rotating transmission member 11, the reciprocating body 12, and the guide assembly 16 are all arranged in the activity space. In this embodiment, the activity space formed by the connection and enclosure of the box 15 and the base 10a can provide a space for assembly and movement of the rotating transmission member 11, the reciprocating body 12, and the guide assembly 16, thereby improving the assembly stability between these structures. At the same time, under this structural setting, the structural members in the activity space are not easy to enter dust, so that this structural setting of the box 15 and the base 10a is conducive to dust prevention of the reciprocating mechanism 1002. In some embodiments, sealing rings, sealing rings, and other structures can also be set at the corresponding positions of the box 15 and the base 10a to waterproof.

[0086] The rotating transmission member 11 is axially limited at the base 10a, that is, the rotating transmission member 11 will not move axially relative to the base 10a, so that when the rotating transmission member 11 rotates relative to the base 10a, the rotational energy can be transmitted to the first rolling member 13 and the second rolling member 14 through the first guide groove 11a and the second guide groove 11b as much as possible, thereby maximizing the displacement change of the first rolling member 13 and the second rolling member 14 along the axial direction of the rotating transmission member 11, which is beneficial to maximizing the reciprocating motion stroke of the reciprocating body 12, so as to improve the transmission efficiency of the reciprocating mechanism 1002.

[0087] In the above embodiment, when the rotating transmission member 11 rotates relative to the base 10a, the reciprocating body 12 reciprocates in the activity space along the guide assembly 16 driven by the rotating transmission member 11. Since the guide assembly 16 has a guiding and supporting effect on the reciprocating body 12, the stability of the reciprocating mechanism 1002 is further improved.

[0088] Continuing to refer to FIG. 11 , the guide assembly 16 includes at least two guide rods 16a, and the two ends of each guide rod 16a are respectively connected to the base 10a and the box body 15. In this embodiment, the guide rods 16a are parallel to the axial direction of the rotating transmission member 11, and the reciprocating body 12 is slidably connected to the guide rods 16a. In this way, when the rotating transmission member 11 rotates, the reciprocating body 12 slides smoothly along the guide rods 16a. The reciprocating body 12 and the guide rods 16a can be slidably connected through linear bearings 12c, so that the linear bearings 12c are used to reduce the sliding friction between the reciprocating body 12 and the guide rods 16a, reduce the heat loss during the movement of the reciprocating mechanism 1002, and improve the energy conversion rate. The reciprocating body 12 is a cavity with an inner cavity, and the rotating transmission member 11 is located in the inner cavity. The side wall of the reciprocating body 12 is provided with an installation space 121 that penetrates the inner cavity. The first mounting portion 12a and the second mounting portion 12b both have the mounting space 121, so as to facilitate the mounting of the first rolling element 13 and the second rolling element 14 from the outside of the reciprocating body 12 into the corresponding mounting space 121, so that the first rolling element 13 and the second rolling element 14 respectively match the first guide groove 11a and the second guide groove 11b.

[0089] As shown in combination with FIG. 11 and FIG. 12 , in some embodiments, a plurality of balls 123 are respectively arranged in the installation space 121 at the first installation portion 12a and the second installation portion 12b through the ball sleeve 122, and the plurality of balls 123 arranged in the first installation portion 12a abut against the first rolling member 13, thereby improving the smoothness of the movement of the first rolling member 13 along the first guide groove 11a. Correspondingly, the plurality of balls 123 arranged in the second installation portion 12b abut against the second rolling member 14, thereby improving the smoothness of the movement of the second rolling member 14 along the second guide groove 11b. A cover 124 is provided at the installation space 121. After the plurality of balls 123 are arranged in the corresponding installation space 121 by using the ball sleeve 122, the notch of the installation space 121 can be covered by the cover 124 to prevent the ball sleeve 122 from detaching from the installation space 121. Of course, in some embodiments, after the ball sleeve 122 installs the plurality of balls 123 into the installation space 121 , the ball sleeve 122 can be fixed to the reciprocating body 12 by means of clamping or welding.

[0090] The first rolling element 13 and the second rolling element 14 can be balls. Understandably, the diameter of the balls is greater than the diameter of the rolling balls 123, so that the plurality of rolling balls 123 are against the surface of the balls, so that when the balls roll, the rolling balls 123 can reduce the friction between the balls and the reciprocating body 12, thereby reducing the stuck phenomenon.

[0091] In the circumferential direction of the rotating transmission member 11, a guide rod 16a is provided between any adjacent first rolling members 13 and second rolling members 14. In this embodiment, the guide rod 16a is provided by utilizing the space vacated by the staggered arrangement of the first rolling members 13 and the second rolling members 14 in the circumferential direction of the rotating transmission member 11, so that the reciprocating mechanism 1002 does not need to provide additional space for the arrangement. This structural arrangement improves the space utilization rate of the activity space enclosed by the box body 15 and the base 10a, and the guide rod 16a can be used to support and guide the reciprocating body 12, so as to enhance the stability of the reciprocating motion of the reciprocating body 12 in the activity space.

[0092] In the embodiment where the reciprocating mechanism 1002 is provided with two first rolling elements 13 and two second rolling elements 14, the two first rolling elements 13 are arranged at intervals of 180° in the circumferential direction of the rotating transmission element 11, the two second rolling elements 14 are arranged at intervals of 180° in the circumferential direction of the rotating transmission element 11, and any adjacent first rolling elements 13 and second rolling elements 14 are spaced 90° in the circumferential direction of the rotating transmission element 11. At this time, the reciprocating body 12 is subjected to four supporting forces perpendicular to the axial direction of the rotating transmission element 11, and each supporting force is evenly arranged in the axial direction around the rotating transmission element 11, so that the stability of the reciprocating body 12 moving relative to the rotating transmission element 11 along the axial direction is good.

[0093] Furthermore, the guide rod 16a is arranged at the middle position of the circumferential direction of the reciprocating body 12 of the adjacent first rolling element 13 and the second rolling element 14. That is to say, in the axial direction of the rotating transmission member 11, the guide rod 16a is arranged at a 45° interval with the first rolling element 13, and the guide rod 16a is arranged at a 45° interval with the second rolling element 14. In this way, the first rolling element 13, the second rolling element 14 and the guide rod 16a are arranged in the reciprocating mechanism 1002 in a central rotationally symmetrical manner around the axial direction of the rotating transmission member 11, which is conducive to maintaining the consistency of the structural weighting in all directions of the reciprocating mechanism 1002, so as to reduce the centrifugal phenomenon that occurs when the reciprocating mechanism 1002 is biased to one side when working, and therefore, it is conducive to maintaining the overall stability of the reciprocating mechanism 1002 when working.

[0094] Referring again to FIG. 8 and FIG. 9 , in some embodiments, the base 10 a is rotatably provided with a rotating member 17 , the rotating member 17 is connected to the rotating transmission member 11 , and the rotating member 17 is used to drive the rotating transmission member 11 to rotate relative to the base 10 a .

[0095] In this embodiment, since the rotating member 17 is rotatably connected to the base 10a, the rotational movement of the rotating transmission member 11 is realized. Only the connection between the rotating transmission member 11 and the rotating member 17 needs to be considered. In this way, the rotating transmission member 11 can be processed separately, which is convenient for processing the first guide groove 11a and the second guide groove 11b. Accordingly, the rotational matching process of the rotating member 17 and the base 10a does not need to consider the structural shape of the rotating transmission member 11. During assembly, the rotating transmission member 11 and the rotating member 17 can be assembled step by step, respectively, avoiding the problem of assembly inconvenience caused when the rotating member 17 and the rotating transmission member 11 are assembled as a whole.

[0096] It should be noted that the rotating member 17 can be the output shaft of the motor, or an intermediate connecting member for linkage with the output shaft of the motor, as long as the rotating member 17 can rotate relative to the base 10a to drive the rotating transmission member 11 to rotate.

[0097] Continuing to refer to FIG. 8 , in some embodiments, the base 10a is provided with a first plane bearing 14a, a second plane bearing 14b, a first rolling bearing 14c, and a second rolling bearing 14d arranged coaxially. The rotating member 17 includes a rotating disk 171 and a rotating shaft 172 connected coaxially, and the first plane bearing 14a and the second plane bearing 14b are axially sandwiched between the rotating disk 171 and the rotating transmission member 11. The first rolling bearing 14c is sleeved between the peripheral side wall of the rotating disk 171 and the inner wall of the base 10a, and the second rolling bearing 14d is sleeved between the peripheral side wall of the rotating shaft 172 and the inner wall of the base 10a.

[0098] As shown in FIG8 , the base 10a is provided with a through hole 141 for mounting the rotating member 17, and the through hole 141 has a constricted section 141a, and the two ends of the constricted section 141a respectively form a first step groove 141b and a second step groove 141c. The first plane bearing 14a is arranged in the first step groove 141b, and one side of the first plane bearing 14a axially abuts against the rotating disk 171, and the other side maintains a gap with the rotating shaft 172, so that there is no rotational interference between the rotating shaft 172 and the base 10a. The second plane bearing 14b is arranged in the second step groove 141c, and one side of the second plane bearing 14b axially abuts against the rotating transmission member 11, and the other side maintains a gap with the rotating shaft 172, so that there is no rotational interference between the rotating shaft 172 and the base 10a.

[0099] In some embodiments, the end of the rotating transmission member 11 facing the rotating disk 171 is formed with a mounting hole 111 and a cam 112. One end of the rotating shaft 172 away from the rotating disk 171 is inserted into the mounting hole 111, the cam 112 is located at the periphery of the mounting hole 111, and the second rolling bearing 14d is sleeved between the outer peripheral wall of the cam 112 and the inner wall of the base 10a. In this embodiment, the second rolling bearing 14d can enable the rotating transmission member 11 to rotate smoothly relative to the base 10a. In this embodiment, the end surface of the cam 112 abuts against the second plane bearing 14b.

[0100] The rotating shaft 172 and the mounting hole 111 of the rotating transmission member 11 can be connected by clamping or welding, or can be locked by a nut after the rotating shaft 172 passes through the mounting hole 111. The connection method between the rotating shaft 172 and the rotating transmission member 11 is not limited here.

[0101] It should be noted that, based on the reciprocating mechanism 1002, when the rotating transmission member 11 rotates, the reciprocating body 12 can reciprocate along the axial direction of the rotating transmission member 11. Therefore, by connecting the piston 102 to the reciprocating body 12, the reciprocating body 12 can drive the piston 102 to reciprocate.

[0102] For example, as shown in combination with FIG8 and FIG9, the piston 102 is connected to the reciprocating body 12 via a piston rod 103. Specifically, one end of the piston rod 103 is connected to the reciprocating body 12, and the other end of the piston rod 103 is connected to the piston 102. The piston rod 103 and the reciprocating body 12 may be connected by threaded connection, hot melt connection or snap connection, or the piston rod 103 and the reciprocating body 12 may be connected by bolts. The piston 102 may be threadedly connected to the piston rod 103, or may be snap-connected to the piston rod 103. The connection method between the piston rod 103 and the piston 102, and the connection method between the piston rod 103 and the reciprocating body 12 are not limited here.

[0103] The piston rod 103 can transmit force between the reciprocating body 12 and the piston 102. When the rotary transmission member 11 rotates, the reciprocating body 12 reciprocates along the axial direction of the rotary transmission member 11 in the housing 15, so that the piston rod 103 can telescope relative to the housing 15, so that the piston 102 connected to the piston rod 103 can reciprocate in the cylinder 101.

[0104] It should be noted that the housing (such as the first housing 104) of the compression cylinder 1001 may be connected to the box body 15 to achieve assembly between the compression cylinder 1001 and the reciprocating mechanism 1002. In some embodiments, the first housing 104 of the compression cylinder 1001 may be connected to the box body 15 by snap-fit ​​or by bolts, and the specific connection method is not limited herein.

[0105] In some embodiments, the first housing 104 is sealed with the housing 15, and a sealing structure such as a bushing 18 or a Gly ring 19 can be arranged in the structural part of the first housing 104 and the housing 15 close to the piston rod 103, as long as the position where the piston rod 103 is inserted can be sealed. For example, the housing 15 is provided with an axial hole 15a for the piston rod 103 to extend, and a bushing 18 is sleeved between the inner wall of the axial hole 15a and the outer wall of the piston rod 103. The bushing 18 is used to seal the gap between the inner wall of the axial hole 15a and the outer wall of the piston rod 103, so as to achieve waterproof and dustproof effects. The bushing 18 can be made of wear-resistant materials such as plastic or rubber. In some embodiments, a Gly ring 19 can also be arranged in the axial hole 15a, and the Gly ring 19 is sleeved on the piston rod 103, so as to further enhance the sealing effect by using the Gly ring 19. The Gly ring 19 has low friction, no creeping, small starting force, and is resistant to high pressure. Therefore, the Gly ring 19 is used to seal the piston rod 103 and the shaft hole 15a, while not hindering the smooth telescopic movement of the piston rod 103 relative to the box body 15 driven by the reciprocating body 12.

[0106] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the inventive concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A valve plate assembly, characterized in that: include: The valve plate is provided with a first mounting groove, a second mounting groove, a first air channel and a second air channel, wherein the first air channel penetrates to the bottom of the first mounting groove, and the second air channel penetrates to the bottom of the second mounting groove; a first valve plate, disposed in the first mounting groove, wherein a portion of the first valve plate closes the first air passage, and when air flows through the first air passage from one side of the valve plate facing away from the first valve plate to the other side, a portion of the first valve plate corresponding to the first air passage is deformed to open the first air passage; A pressing plate, arranged in the second mounting groove, the pressing plate is provided with a third air passage; The second valve sheet is sandwiched between the valve plate and the pressure plate. Part of the structure of the second valve sheet closes the third airway. When the air flows through the third airway toward the second airway, the part of the second valve sheet corresponding to the third airway is deformed to open the third airway.

2. The valve plate assembly according to claim 1, characterized in that: The first valve plate and the second valve plate both include a covering portion and an elastic portion, both sides of the elastic portion are separated from the covering portion by a separation groove, both ends of the elastic portion are connected to the covering portion, and the elastic portion can be elastically deformed relative to the covering portion under the thrust of the airflow.

3. The valve plate assembly according to claim 2, characterized in that: At least one of the first air channel, the second air channel and the third air channel is an arc-shaped groove; and / or the elastic portion is fan-shaped.

4. The valve plate assembly according to claim 1 or 2, characterized in that: The depth of the first mounting groove is greater than or equal to the thickness of the first valve sheet; and / or, an air avoidance groove is provided at the bottom of the second mounting groove, the second air duct penetrates to the bottom of the air avoidance groove, and the position of the air avoidance groove in the second mounting groove corresponds to the portion of the second valve sheet where deformation occurs.

5. The valve plate assembly according to claim 4, characterized in that: A first sealing ring is provided around the first valve plate, and the first sealing ring is sealingly abutted against the side wall of the first mounting groove; and / or a second sealing ring is provided around the pressure plate or the second valve plate, and the second sealing ring is sealingly abutted against the side wall of the second mounting groove.

6. A compression cylinder, characterized in that: It comprises a cylinder body, a piston and a valve plate assembly as described in any one of claims 1 to 5, wherein the cylinder body has a volume chamber, the piston is arranged in the volume chamber, and when the piston reciprocates in the volume chamber, the first valve plate and the second valve plate are deformed alternately so that the first air channel and the third air channel are opened alternately.

7. The compression cylinder according to claim 6, characterized in that: It also includes a first shell, which is connected to one side of the cylinder body, and has a first air inlet and a first air outlet. The valve plate assembly is sandwiched between the cylinder body and the first shell. When the piston moves in a first direction relative to the cylinder body, the first air inlet pumps gas into the volume chamber through the first air channel. When the piston moves in a second direction relative to the cylinder body, the piston discharges the gas in the volume chamber from the first air outlet through the second air channel and the third air channel. The first direction is opposite to the second direction.

8. The compression cylinder according to claim 7, characterized in that: The cylinder body is sealed with the valve plate, and the first housing is sealed with the valve plate and / or the cylinder body.

9. The compression cylinder according to claim 6, characterized in that: It also includes a first shell and a second shell, the first shell and the second shell are respectively connected to the two sides of the cylinder body, the piston divides the volume chamber into a first chamber and a second chamber, the first chamber is located between the first shell and the piston, and the second chamber is located between the second shell and the piston; wherein the first shell has a first air inlet and a first air outlet, the second shell has a second air inlet and a second air outlet, the compression cylinder includes two groups of valve plate assemblies, the two groups of valve plate assemblies are respectively a first valve plate assembly and a second valve plate assembly, the first valve plate assembly is clamped between the cylinder body and the first shell, and the second valve plate assembly is clamped between the between the cylinder body and the second shell; when the piston moves toward a first direction relative to the cylinder body, the first air inlet pumps gas into the first cavity through the first air channel of the first valve plate assembly, and the piston discharges the gas in the second cavity from the second air outlet through the second air channel and the third air channel of the second valve plate assembly; when the piston moves toward a second direction relative to the cylinder body, the second air inlet pumps gas into the second cavity through the first air channel of the second valve plate assembly, and the piston discharges the gas in the first cavity from the first air outlet through the second air channel and the third air channel of the first valve plate assembly, and the first direction is opposite to the second direction.

10. A compression device, characterized in that: It comprises a reciprocating mechanism and a compression cylinder as described in any one of claims 6 to 9, wherein the reciprocating mechanism is used to drive the piston to perform reciprocating motion in the volume chamber.

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