Valve structure and compressor

Abstract

The invention provides a valve structure and a compressor, and relates to the technical field of valve bodies. The valve structure comprises a supporting seat, a valve plate and an elastic assembly, wherein the elastic assembly comprises a plurality of elastic pieces arranged between a supporting body and the valve plate; the valve plate can be switched between a first state for opening the air port and a second state for closing the air port in the process of moving in the first direction; the number of the elastic pieces which are in the compressed state and abut against the valve plate in the first state is larger than the number of the elastic pieces which are in the compressed state and abut against the valve plate in the second state. According to the invention, different numbers of elastic pieces are arranged to respectively participate in action when the valve plate is opened (in the first state) and closed (in the second state): in the opening stage of the valve plate, only a small number of elastic pieces apply resistance to the valve plate, so that the valve plate can easily open an air port only by small driving force, and the opening sensitivity is improved; and in the closing stage of the valve plate, more elastic pieces participate in the action, stronger reset force is provided, and the valve plate is promoted to reset quickly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of valve body, in particular to a valve structure and a compressor. BACKGROUND

[0002] Valve structure is a commonly used component for opening and closing gas port. For example, in a compressor, valve structure is usually used to control the suction and discharge of refrigerant gas, so as to realize the periodic working cycle of the compressor. In the prior art, the opening and closing of the gas port is usually realized by the extension and contraction of a single spring or the synchronous extension and contraction of multiple springs. If the stiffness of the spring is set to be low, the reset force of the spring will be insufficient when closing the gas port, which is easy to cause the closing lag of the valve plate, and thus affects the sealing effect; if the stiffness of the spring is increased to enhance the reset force when closing, the driving force required for opening the valve plate will be increased, and the opening sensitivity will be reduced. SUMMARY

[0003] Therefore, the present application provides a valve structure and a compressor, aiming to solve the contradiction in the selection of spring stiffness of the valve structure in the prior art, that is, it is difficult to simultaneously consider the sealing effect when closing the gas port and the sensitivity when opening.

[0004] The technical scheme of the present application is implemented as follows: The valve structure provided by the present application comprises a support seat, a valve plate and an elastic assembly, wherein the support seat comprises a support body; the valve plate is arranged in a spaced manner with the support body in a first direction; the elastic assembly comprises a plurality of elastic members arranged between the support body and the valve plate; wherein the valve plate can be switched between a first state of being close to the support body to open the gas port and a second state of being away from the support body to close the gas port during movement in the first direction; the number of elastic members in compression state and abutting against the valve plate in the first state is more than that in the second state.

[0005] In an embodiment, the plurality of elastic members comprises a first spring and a second spring arranged in an extending manner along the first direction respectively; in the first state, the first spring and the second spring are compressed and abut against the valve plate respectively; in the second state, the second spring is in free length state, and the first spring is compressed and abuts against the valve plate.

[0006] In an embodiment, the stiffness coefficient of the first spring is smaller than that of the second spring.

[0007] In an embodiment, a plurality of second springs are arranged, and the plurality of second springs are distributed in a circumferential direction around the first spring.

[0008] In an embodiment, the support base further comprises a limiting structure disposed on the support body to guide the first spring and the second spring to move along the first direction.

[0009] In an embodiment, the limiting structure comprises a limiting cylinder extending along the first direction, the limiting cylinder is disposed on the support body and opens towards the valve plate; one end of the first spring abuts against a bottom wall of the limiting cylinder and the other end of the first spring extends out of the limiting cylinder to abut against the valve plate; and / or, the limiting structure comprises a limiting column extending along the first direction, the limiting column is disposed on the support body; the second spring is sleeved on an outer peripheral wall of the limiting column.

[0010] In an embodiment, the bottom wall of the limiting cylinder is provided with a through hole, the through hole penetrates through the support body; an aperture of the through hole is smaller than an aperture of the limiting cylinder to form a stepped surface; the first elastic member abuts against the stepped surface.

[0011] In an embodiment, the limiting column has a length greater than a free length of the second spring, the valve plate is provided with a clearance; wherein, during the movement of the valve plate along the first direction, the limiting column penetrates through the clearance to enable the second spring to abut against the valve plate.

[0012] In an embodiment, the support base further comprises a connecting portion connected to the support body, the connecting portion is capable of being fixed to the side of the gas port by a screwing member.

[0013] The application further provides a compressor, the compressor comprising a valve structure, the valve structure comprising a support base, a valve plate and an elastic assembly, the support base comprising a support body; the valve plate is disposed apart from the support body in a first direction; the elastic assembly comprises a plurality of elastic members disposed between the support body and the valve plate; wherein, during the movement of the valve plate along the first direction, the valve plate is capable of switching between a first state of being close to the support body to open the gas port and a second state of being away from the support body to close the gas port; the number of elastic members in compression state and abutting against the valve plate in the first state is more than the number of elastic members in compression state and abutting against the valve plate in the second state.

[0014] In an embodiment, the compressor further comprises a cylinder, a cylinder wall of the cylinder is provided with a gas port; the valve structure is mounted on the outside of the cylinder to open or close the gas port.

[0015] The embodiment of the present application sets different numbers of elastic members to participate in action when the valve piece is opened (first state) and closed (second state) respectively: in the valve piece opening stage, only a small number of elastic members exert resistance on it, so that the valve piece can be easily opened with a small driving force, ensuring the opening sensitivity; while in the valve piece closing stage, more elastic members participate in action, providing stronger reset force to promote the valve piece to reset quickly, reducing the risk of air flow backflow, thereby effectively improving the sealing effect when the air port is closed. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0017] Figure 1 The valve structure and the assembly diagram of the cylinder wall of the air cylinder are provided. Figure 2 The partial structure diagram of the cylinder wall of the air cylinder is provided. Figure 3 The overall structure diagram of the valve structure is provided. Figure 4 The exploded view of the valve structure is provided. Figure 5 The overall sectional view of the valve structure is provided.

[0018] Explanation of reference signs: 100, valve structure; 1, support seat; 11, support body; 12, limiting structure; 121, limiting cylinder; 1211, through hole; 1212, step surface; 122, limiting column; 13, connecting part; 14, screwing part; 2, valve piece; 21, avoiding port; 3, elastic assembly; 31, elastic member; 31a, first spring; 31b, second spring; 200, cylinder wall of air cylinder; 201, air port; 202, sunken area. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] A valve is a common component used to open and close gas ports. For example, in a compressor, a valve is typically used to control the intake and discharge of refrigerant gas, thereby enabling the compressor's cyclical operation. In existing technology, valves usually rely on the extension and contraction of a single spring or the synchronized extension and contraction of multiple springs to open and close the gas ports. If the spring stiffness is set too low, the spring's restoring force will be insufficient when closing the gas port, easily causing the valve plate to close lag, thus affecting the sealing effect. If the spring stiffness is increased to enhance the restoring force when closing, it will increase the driving force required for the valve plate to open, reducing the opening sensitivity.

[0023] In view of this, the present invention provides a valve structure that aims to solve the contradiction in the selection of spring stiffness in the valve structure of the prior art, namely, it is difficult to simultaneously take into account the sealing effect when the air port is closed and the sensitivity when it is opened.

[0024] Please see Figure 1 and Figure 2 This valve structure 100 is applicable to equipment requiring gas flow control, such as air conditioning compressors and refrigerator compressors. The valve structure 100 is positioned corresponding to the gas port 201 of these devices, specifically either inside or outside the device. If the valve structure 100 is positioned outside the gas port 201, it can be considered an exhaust valve; if it is positioned inside the gas port 201, it can be considered an intake valve. Of course, this valve structure is not only suitable for pure gas environments but also for gas-liquid mixed environments. Please combine Figure 3The valve structure 100 includes a support base 1 and a valve plate 2. The support base 1, as the basic component of the valve structure 100, provides a stable mounting and load-bearing platform for the entire structure through its support body 11. The valve plate 2 is used to open and close the air port 201, and the valve plate 2 is spaced apart from the support body 11 in a first direction. This first direction can be inclined relative to the axis of the air port 201, or it can be aligned with the axial direction of the air port 201 (e.g., ...). Figure 1 and Figure 3 As shown, the dashed line 'c' represents the first direction (which is the same as the axial direction of the air port 201). The specific direction needs to be determined according to the actual installation requirements. This spacing arrangement provides the necessary space for the movement of the valve plate 2, allowing the valve plate 2 to smoothly switch between the open and closed states of the air port 201. The valve structure 100 also includes an elastic component 3, which comprises multiple ("multiple" means two or more) elastic elements 31 disposed between the support body 11 and the valve plate 2. The elastic element 31 can be a spring, a spring sheet, or other component with elastic deformation capability. Multiple elastic elements 31 can be a combination of multiple springs, a combination of springs and spring sheets, or a combination of other elastic components. The function of these elastic elements 31 is as follows: when the valve plate 2 moves along a first direction, it can switch between a first state of being close to the support body 11 to open the air port 201 and a second state of being away from the support body 11 to close the air port 201. In the first state, the valve plate 2 moves closer to the support body 11, at which point the air port 201 is opened, allowing gas to pass smoothly; while in the second state, the valve plate 2 moves away from the support body 11, thereby closing the air port 201 and preventing gas flow.

[0025] The key point is that in the first state, the number of elastic elements 31 in a compressed state and abutting against the valve plate 2 is greater than the number in the second state; where "the number of elastic elements 31 in a compressed state and abutting against the valve plate 2" can be understood as the number of elastic elements 31 that exert an effect on the valve plate 2. To achieve the effect of varying the number of elastic elements 31 acting on the valve plate 2, when setting the elastic component 3, it is only necessary to adaptively set the length of some elastic elements 31 in the first direction, so that these elastic elements 31 sometimes exert an effect and sometimes do not exert an effect during the opening and closing of the air port 201 of the valve plate 2. The length of the elastic element 31 is set as follows: When the valve plate 2 is in the second state, some of the elastic elements 31 do not contact the valve plate 2 because their length is not compressed (or: some of the elastic elements 31, although in contact with the valve plate 2, do not apply elastic force to the valve plate 2 because their length is not compressed). At this time, only a small number of elastic elements 31 apply a restoring force to the valve plate 2. When the valve plate 2 moves toward the support body 11 and enters the first state, as the distance between the valve plate 2 and the support body 11 shortens, the elastic elements 31 that were not in contact (or: the elastic elements 31 that were in contact but did not apply elastic force to the valve plate 2) are gradually compressed and begin to abut against the valve plate 2, thereby increasing the number of elastic elements 31 that participate in the action, thus providing sufficient driving force during the opening process.

[0026] This design allows for easy opening of the air port 201. During the transition from the second state to the first state (the initial stage of opening the air port 201), the number of active elastic elements 31 is small, resulting in a smaller force applied to the valve plate 2. Conversely, during the transition from the first state to the second state (the initial stage of closing the air port 201), the number of active elastic elements 31 is large, resulting in a larger force applied to the valve plate 2 and a greater acceleration, allowing for rapid closure of the air port 201. In summary, the valve structure 100 provided in this embodiment of the invention includes a support base 1, a valve plate 2, and an elastic component 3. The support base 1 includes a support body 11; the valve plate 2 and the support body 11 are spaced apart in a first direction; the elastic component 3 includes a plurality of elastic elements 31 disposed between the support body 11 and the valve plate 2; wherein, during the movement of the valve plate 2 along the first direction, it can switch between a first state of being close to the support body 11 to open the air port 201 and a second state of being away from the support body 11 to close the air port 201; the number of elastic elements 31 in the first state that are in a compressed state and abut against the valve plate 2 is greater than the number of elastic elements 31 in the second state that are in a compressed state and abut against the valve plate 2. In this embodiment of the invention, different numbers of elastic elements 31 are set to participate in the operation when the valve plate 2 is open (first state) and closed (second state): when the valve plate 2 is open, only a small number of elastic elements 31 apply resistance to it, so that the valve plate 2 can easily open the air port 201 with only a small driving force, ensuring the opening sensitivity; while when the valve plate 2 is closed, more elastic elements 31 participate in the operation, providing a stronger reset force, prompting the valve plate 2 to reset quickly, reducing the risk of airflow backflow, thereby effectively improving the sealing effect when the air port 201 is closed.

[0027] In some embodiments, please refer to Figure 3 and Figure 4 The elastic element 31 is a spring. Specifically, the multiple elastic elements 31 include a first spring 31a and a second spring 31b extending along a first direction, respectively. In a first state, the first spring 31a and the second spring 31b are compressed and abut against the valve plate 2, respectively. In a second state, the second spring 31b is in its free length state, i.e., it returns to its original shape, and the first spring 31a is compressed and abuts against the valve plate 2. During the entire process of the valve plate 2 changing from the first state to the second state, the maximum compression of the first elastic element 31 and the second elastic element 31 in the first direction can be adjusted as needed, as long as the maximum compression of the first elastic element 31 is greater than the maximum compression of the second elastic element 31. Furthermore, the stiffness coefficients of the first spring 31a and the second spring 31b can be the same or different.

[0028] In practical applications, when the air port 201 needs to be opened, the valve plate 2 is subjected to external forces such as gas pressure and begins to move towards the support body 11 along the first direction. At this time, the first spring 31a is compressed first. Since the number of elastic elements 31 involved is small and the overall elastic force is also small, the valve plate 2 only needs a small driving force to overcome the elastic force of the first spring 31a, thus moving smoothly. As the valve plate 2 continues to move towards the support body 11, the second spring 31b is gradually compressed and begins to produce an elastic abutment against the valve plate 2. Since the number of elastic elements 31 involved increases, the overall elastic force increases, but at this time the valve plate 2 is already in the process of opening the air port 201. The increased elastic force will not significantly affect the opening sensitivity. On the contrary, it can provide sufficient support force when the valve plate 2 reaches the first state, ensuring that the air port 201 opens stably. When the air port 201 needs to be closed, due to the large overall elasticity, a large reset thrust is generated on the valve plate 2, which gives the valve plate 2 a large acceleration, so that it can quickly move to the second state of closing the air port 201, effectively improving the timeliness of closing. During this process, the second spring 31b gradually returns to the initial state, while the first spring 31a remains in the compressed state, continuously providing a reset force to close the air port 201, thereby ensuring the sealing effect.

[0029] In some embodiments, please refer to Figure 5 To ensure that the valve plate 2 only experiences resistance from the second elastic element 31 when it is fully opened, the compression amounts of the first and second elastic elements 31 have been optimized. Specifically, during the entire process of the valve plate 2 transitioning from the first state to the second state, the maximum compression amount of the first elastic element 31 in the first direction is three times or more the maximum compression amount of the second elastic element 31 in the first direction. Here, "maximum compression amount" is the length of the spring in its free state minus its length at which it undergoes maximum compression deformation.

[0030] For example, the original length of the first spring 31a is set to 15mm, and its compressed length when the valve plate 2 is in the first state is 5mm, with a maximum compression of 10mm. The original length of the second spring 31b is 12mm, and its compressed length when the valve plate 2 is in the first state is 9mm, with a maximum compression of 3mm. At this time, the maximum compression of the first spring 31a is about 3.3 times that of the second spring 31b. With this compression design, when the valve plate 2 just begins to move towards the support body 11 to open the air port 201, only the first spring 31a is compressed and applies elastic force to the valve plate 2. The second spring 31b will not contact the valve plate 2 or will only make slight contact without generating effective elastic force in the early stage of the valve plate 2's movement. It is not until the valve plate 2 moves to a position close to the support body 11 (i.e., when the air port 201 is fully opened) that the second spring 31b is significantly compressed and begins to apply resistance to the valve plate 2. This ensures low driving force requirements in the early stage of opening while avoiding premature increase in the movement resistance of the valve plate 2, further optimizing the opening sensitivity.

[0031] In some embodiments, please continue reading Figure 5 In order to open the air port 201 more easily and close the air port 201 more quickly, the stiffness coefficient of the first spring 31a is made smaller than that of the second spring 31b.

[0032] The advantage of this design is that when valve plate 2 is in the opening phase, i.e., transitioning from the second state to the first state, the first spring 31a, with its smaller stiffness coefficient, is compressed first, resulting in relatively low elastic resistance. Valve plate 2 can easily overcome this resistance with only a small driving force, thus ensuring the sensitivity of opening. In the closing phase, when valve plate 2 transitions from the first state to the second state, in addition to the first spring 31a continuing to provide the restoring force, the second spring 31b, with its larger stiffness coefficient, also participates. The combined restoring force is greater, enabling valve plate 2 to move to the closed position more quickly, effectively improving the sealing effect during closing. For example, if the stiffness coefficient of the first spring 31a is 5 N / mm and the stiffness coefficient of the second spring 31b is 10 N / mm, in the initial opening stage, only the first spring 31a is active, resulting in less resistance to valve plate 2 and easier activation. During the closing process, both springs work together, with a total stiffness coefficient reaching 15 N / mm, significantly increasing the restoring force, accelerating the closing speed of valve plate 2, and reducing the risk of gas backflow.

[0033] In some embodiments, please refer to Figure 3 and Figure 4 The arrangement of the first elastic element 31 and the second elastic element 31 is as follows: multiple second springs 31b are provided, and the multiple second springs 31b are distributed circumferentially around the first spring 31a.

[0034] This circumferential distribution allows multiple second springs 31b to apply elastic force evenly to the valve plate 2 during opening and closing, preventing the valve plate 2 from tilting or jamming due to uneven force. For example, when the first spring 31a is located at the center of the valve plate 2, the four second springs 31b can be respectively arranged on the same circumference with the first spring 31a as the center, and the included angle between two adjacent second springs 31b is 90 degrees. In this way, when the valve plate 2 moves towards the support body 11 into the first state, multiple second springs 31b can be compressed synchronously and abut against the valve plate 2, ensuring that the valve plate 2 remains stable during movement and reducing wear caused by excessive local force; when the valve plate 2 changes from the first state to the second state, multiple second springs 31b can also provide a restoring force at the same time, further improving the stability and sealing of the valve plate 2 when closed. In addition, the arrangement of multiple second springs 31b can improve the overall structural strength and reliability of the elastic component 3. Even if one of the second springs 31b fails, the other second springs 31b can still maintain the function of the elastic component 3 to a certain extent, reducing the risk of the valve structure 100 being paralyzed due to the failure of a single elastic element 31.

[0035] In some embodiments, please refer to Figure 4 and Figure 5 To ensure that the valve plate 2 can stably open and close the air port 201 and move along the first direction, the elastic element 31 needs to apply a force to the valve plate 2 only along the first direction. For this purpose, a limiting structure 12 is added to the support base 1. Specifically, the limiting structure 12 is provided on the support body 11 to guide the first spring 31a and the second spring 31b to move along the first direction.

[0036] The limiting structure 12 can be configured in at least the following ways: First, a mounting hole corresponding to the first spring 31a is formed on the support body 11. The axis of this mounting hole is aligned with the first direction. One end of the first spring 31a extends into the mounting hole, and the other end extends out. Simultaneously, a guide post is provided on the support body 11, extending in the same direction as the first direction. The second spring 31b is fitted onto the guide post. Second, mounting holes corresponding one-to-one with the first spring 31a and the second spring 31b are formed on the support body 11. The axis of this mounting hole is aligned with the first direction. One end of the spring is embedded in the mounting hole and abuts against the bottom of the hole, while the other end abuts against the valve plate 2. The radial movement of the spring is restricted by the inner wall of the mounting hole, ensuring that the spring can only extend and retract along the first direction, thereby guaranteeing that the force exerted by the spring on the valve plate 2 is always along the first direction. The third method involves setting guide posts on the side of the support body 11 facing the valve plate 2, with the same number of guide posts as the springs. The extension direction of the guide posts is consistent with the first direction. The spring is sleeved on the guide posts, and the outer circumferential surface of the guide posts is clearance-fitted with the inner circumferential surface of the spring. In this way, the guide posts can both guide the extension and contraction of the spring and prevent the spring from radially shifting during compression or extension, ensuring the accurate direction of the spring force. The fourth method involves setting a groove on the valve plate 2 corresponding to the position of the spring. One end of the spring is embedded in the groove, and the depth and inner diameter of the groove are adapted to the spring. At the same time, a protrusion coaxial with the groove is set on the support body 11, and the other end of the spring is sleeved on the protrusion. The groove and the protrusion together constitute a limiting structure 12 for the spring, ensuring that the spring's axis is always consistent with the first direction during movement, avoiding uneven force on the valve plate 2 due to spring skewing. The setting of these limiting structures 12 effectively avoids the bending or twisting of the spring due to lateral forces, ensuring the stable movement of the valve plate 2 in the first direction, and improving the reliability and stability of the valve structure 100.

[0037] In some embodiments, please refer to Figure 4 and Figure 5 In order to deform the first spring 31a along the first direction, the limiting structure 12 includes a limiting cylinder 121 extending along the first direction. Specifically, the limiting cylinder 121 is disposed on the support body 11 and its opening faces the valve plate 2. One end of the first spring 31a abuts against the bottom wall of the limiting cylinder 121, and the other end extends out of the limiting cylinder 121 to abut against the valve plate 2.

[0038] A small gap can be provided between the inner wall of the limiting cylinder 121 and the outer peripheral surface of the first spring 31a to reduce frictional resistance while providing radial constraint on the first spring 31a. The height of the limiting cylinder 121 can be designed according to the maximum compression of the first spring 31a to ensure that the first spring 31a can be fully compressed within the limiting cylinder 121 without radial displacement when the valve plate 2 is in the first state. In addition, the limiting cylinder 121 not only effectively restricts the radial movement of the first spring 31a, but also plays a positioning role in the installation of the first spring 31a, facilitating the quick and accurate placement of the first spring 31a in the preset position during assembly, thereby improving the assembly efficiency of the valve structure 100.

[0039] In some embodiments, please refer to Figure 4 and Figure 5 To balance the air pressure inside and outside the limiting cylinder 121, a through hole 1211 is provided on the bottom wall of the limiting cylinder 121 and passes through the supporting body 11; correspondingly, the diameter of the through hole 1211 is smaller than the diameter of the limiting cylinder 121 to form a stepped surface 1212; the first elastic member 31 abuts against the stepped surface 1212.

[0040] By opening a through hole 1211 in the bottom wall of the limiting cylinder 121, when the valve plate 2 moves closer to the support body 11 and compresses the first spring 31a, the air inside the limiting cylinder 121 can be discharged through the through hole 1211, preventing back pressure caused by air compression from affecting the normal deformation of the spring; while when the valve plate 2 moves away from the support body 11 and extends the first spring 31a, external air can enter the limiting cylinder 121 through the through hole 1211, avoiding the formation of negative pressure that hinders the spring's return to its original position. In other words, the through hole 1211 can be used to balance the air pressure inside and outside the limiting cylinder 121, preventing the formation of a pressure difference inside the limiting cylinder 121 during the movement of the valve plate 2, which would generate additional resistance to the extension and contraction of the first spring 31a.

[0041] In some embodiments, please refer to Figure 3 and Figure 4 In order to enable the second elastic element 31 to move and deform along the first direction, the limiting structure 12 includes a limiting post 122 extending along the first direction. Specifically, the limiting post 122 is disposed on the support body 11, and the second spring 31b is sleeved on the outer peripheral wall of the limiting post 122.

[0042] The extension length of the limiting post 122 can be adapted to the compression stroke of the second spring 31b. When the valve plate 2 is in the second state, the second spring 31b is in a natural state or a slightly compressed state. A certain gap can be left between the end of the spring 31b away from the support body 11 and the valve plate 2, or there may be only slight contact without generating effective elastic force. When the valve plate 2 moves towards the support body 11 to the first state, the second spring 31b is gradually compressed. The outer peripheral wall of the limiting post 122 can block the radial expansion of the second spring 31b, preventing the second spring 31b from bending or tilting during compression, ensuring that its elastic force always acts on the valve plate 2 in the first direction. Simultaneously, the diameter of the limiting post 122 matches the inner diameter of the second spring 31b, usually using a clearance fit. This ensures that the second spring 31b can smoothly extend and retract axially along the limiting post 122, while avoiding radial wobble caused by an excessively loose fit. The limiting post 122 also provides a clear installation reference for the second spring 31b during valve structure 100 assembly, improving installation convenience.

[0043] In some embodiments, please refer to Figure 3 and Figure 4 To allow the second elastic element 31 to move better along the first direction, the length of the limiting post 122 is set to be greater than the free length of the second spring 31b (the free length is the natural length of the spring when it is not subjected to external force); however, to avoid interference between the valve plate 2 and the limiting post 122 during movement, a clearance opening 21 is provided on the valve plate 2. Thus, when the valve plate 2 moves along the first direction, the limiting post 122 can pass through the clearance opening 21, allowing the second spring 31b to abut against the valve plate 2. The clearance opening 21 can be either a through hole 1211 or a notch. When the clearance opening 21 is a through hole 1211, its diameter is slightly larger than the diameter of the limiting post 122, and the limiting post 122 can pass through the through hole 1211. A small gap is left between the inner wall of the through hole 1211 and the outer peripheral surface of the limiting post 122 to avoid contact and friction between the two. When the clearance opening 21 is a notch, the notch is opened at the edge of the valve plate 2, and its opening direction is towards the side of the valve plate 2. The limiting post 122 can extend out from the notch. The width of the notch is slightly larger than the diameter of the limiting post 122 to ensure that the limiting post 122 can pass smoothly through the notch without collision when the valve plate 2 moves.

[0044] By setting an avoidance opening 21 on the valve plate 2, the interference problem between the valve plate 2 and the limit post 122 that may occur when the length of the limit post 122 is greater than the length of the second spring 31b is effectively solved. This ensures both the stable guiding effect of the limit post 122 on the second spring 31b and the smooth movement of the valve plate 2 in the first direction, further improving the reliability of the valve structure 100.

[0045] In some embodiments, please continue reading Figure 3 and Figure 4To facilitate installation, a connecting part 13 is added to the support base 1. Specifically, the connecting part 13 is connected to the support body 11, and the connecting part 13 can be fixed to the side of the air port 201 by means of a screw connector 14.

[0046] During installation, the connecting part 13 and the support body 11 can be fixedly connected by welding or integral molding to ensure the stability of the connection. Next, threaded holes corresponding to the screw holes of the connecting part 13 are made on the mounting surface beside (i.e., around) the air port 201. Then, the connecting part 13 is fitted onto the mounting surface, ensuring that the screw holes on the connecting part 13 correspond one-to-one with the threaded holes on the mounting surface. Finally, the screw connector 14 (such as a bolt) is passed through the screw holes of the connecting part 13 and screwed into the threaded holes on the mounting surface. By tightening the screw connector 14, the connecting part 13 is tightly fixed around the air port 201, thus achieving stable installation of the entire valve structure 100. This installation method, using the connecting part 13 and the screw connector 14, is not only simple and convenient to operate, facilitating disassembly, maintenance, or replacement of the valve structure 100 later, but also ensures that the valve structure 100 will not shift position due to airflow impact or other factors during operation, ensuring the correspondence accuracy between the valve plate 2 and the air port 201 and improving the reliability of the valve structure 100.

[0047] This invention also provides a compressor.

[0048] Please see Figures 1 to 5 In any of the figures above, the compressor includes the valve structure 100 provided in any of the above embodiments. The valve structure 100 can be used for both the compressor's exhaust port and its intake port.

[0049] The following explanation uses multiple elastic elements 31, including a first spring 31a and a second spring 31b, as an example.

[0050] When valve structure 100 is used at the compressor exhaust port, during the exhaust phase, the pressure inside the cylinder increases, and the gas pushes valve plate 2 to overcome the resistance of the first spring 31a and move towards the support body 11, opening the exhaust port 201. Because the second spring 31b initially has no effective elasticity, valve plate 2 can open quickly, reducing exhaust resistance and improving efficiency. When the pressure drops to a certain level, the first spring 31a and the second spring 31b work together to close the exhaust port 201, preventing gas backflow and ensuring exhaust volume. When valve structure 100 is used at the compressor intake port, during the intake phase, the pressure inside the cylinder decreases, and external gas pushes valve plate 2 to overcome the resistance of the first spring 31a and move away from the support body 11, opening the intake port 201. Similarly, the second spring 31b initially does not interfere with the movement of valve plate 2, ensuring smooth intake. After intake, the first spring 31a and the second spring 31b work together to close the exhaust port 201, preventing gas leakage and maintaining the intake effect. This application method effectively improves the compressor's exhaust and intake performance by rationally setting flexible components, making its operation more stable and efficient, reducing energy consumption, and improving overall performance and reliability. Furthermore, the compressor also includes a cylinder, the cylinder wall 200 of which has an air port 201, and a valve structure 100 is installed on the outside of the cylinder to open or close the air port 201.

[0051] The valve structure 100 is installed on the outside of the cylinder and serves as an exhaust valve. The specific working principle of the compressor is as follows: When the compressor is running, the piston in the cylinder moves upward (this direction is exemplary and does not limit the structure of the compressor), the volume of the cylinder cavity decreases, and the pressure increases. At this time, the high-pressure gas in the cylinder pushes the valve plate 2, causing the valve plate 2 to overcome the elastic force of the first spring 31a and move towards the support body 11. The air port 201 opens, and the high-pressure gas is discharged out of the cylinder through the air port 201. When the piston moves downward (this direction is exemplary and does not limit the structure of the compressor), the volume of the cylinder cavity increases and the pressure decreases. The first spring 31a and the second spring 31b together generate a restoring force, pushing the valve plate 2 to move rapidly in the opposite direction to close the air port 201 and prevent external gas from flowing back into the cylinder cavity.

[0052] In some embodiments, please refer to Figure 1 and Figure 2 The cylinder wall 200 has a recessed area 202 on the outer side facing the inside of the cylinder, and an air port 201 is provided on the wall of the recessed area 202; the valve structure 100 is installed on the outer side of the cylinder and extends at least partially into the recessed area 202.

[0053] This design fully utilizes the cylinder space, making the installation of the valve structure 100 more compact and reducing the overall size of the compressor. The depth of the recessed area 202 can be adapted to the thickness of the valve structure 100. When the valve structure 100 is installed in the recessed area 202, its surface away from the cylinder can be basically flush with or slightly lower than the outer wall of the cylinder, preventing the valve structure 100 from protruding too much and occupying extra space, which is beneficial to the optimization of the layout of internal compressor components. At the same time, the wall of the recessed area 202 can provide a certain positioning and protection for the outer periphery of the valve structure 100, preventing damage caused by external objects colliding with or squeezing the valve structure 100. In addition, the gas port 201 is opened on the wall of the recessed area 202, which can shorten the gas flow path, reduce the resistance loss of gas during the process of entering and exiting the gas port 201, and further improve the working efficiency of the compressor.

[0054] Furthermore, the depth of the recessed region 202 gradually increases, so that the surface of the recessed region 202 forms a smooth curved surface. This curved surface design can effectively guide the flow direction of gas when entering or exiting the air inlet 201, reduce the vortex phenomenon of airflow in the recessed region 202, and reduce gas flow resistance. For example, when the surface of the recessed region 202 is an arc-shaped curved surface that is concave into the cylinder, the gas will flow smoothly along the curved surface during the process of entering or exiting the air inlet 201, avoiding airflow impact and energy loss caused by right angle or acute angle transitions.

[0055] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A valve structure, configured corresponding to an air port, characterized in that, include: Support base, including support body; The valve plate is spaced apart from the support body in a first direction; The elastic component includes a plurality of elastic elements disposed between the support body and the valve plate; During the movement of the valve plate along the first direction, it can switch between a first state of being close to the support body to open the air port and a second state of being away from the support body to close the air port; the number of elastic elements in the first state that are in a compressed state and abut against the valve plate is greater than the number of elastic elements in the second state that are in a compressed state and abut against the valve plate.

2. The valve structure according to claim 1, characterized in that, The plurality of elastic elements include a first spring and a second spring respectively extending along the first direction; in the first state, the first spring and the second spring are respectively compressed and abut against the valve plate; in the second state, the first spring is compressed and abuts against the valve plate, and the second spring is in a free length state.

3. The valve structure according to claim 2, characterized in that, The stiffness coefficient of the first spring is less than that of the second spring.

4. The valve structure according to claim 2, characterized in that, Multiple second springs are provided, and the multiple second springs are distributed circumferentially around the first spring.

5. The valve structure according to any one of claims 2 to 4, characterized in that, The support base also includes a limiting structure disposed on the support body to guide the first spring and the second spring to move along the first direction.

6. The valve structure according to claim 5, characterized in that, The limiting structure includes a limiting cylinder extending along the first direction, the limiting cylinder being disposed on the support body and having its opening facing the valve plate; one end of the first spring abuts against the bottom wall of the limiting cylinder, and the other end extends out of the limiting cylinder to abut against the valve plate; and / or, The limiting structure includes a limiting post extending along the first direction, the limiting post being disposed on the support body; the second spring is sleeved on the outer peripheral wall of the limiting post.

7. The valve structure according to claim 6, characterized in that, The bottom wall of the limiting cylinder has a through hole that penetrates the support body; the diameter of the through hole is smaller than the diameter of the limiting cylinder to form a stepped surface. The first elastic element abuts against the stepped surface.

8. The valve structure according to claim 6, characterized in that, The length of the limiting post is greater than the free length of the second spring, and the valve plate is provided with a clearance opening; During the movement of the valve plate along the first direction, the limiting post passes through the clearance opening so that the second spring can abut against the valve plate.

9. A compressor, characterized in that, Includes the valve structure as described in any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that, It also includes a cylinder, the cylinder wall of which has an air port; the valve structure is installed on the outside of the cylinder to open or close the air port.

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