One-way valve structure and linear compressor

Abstract

The present disclosure relates to a one-way valve structure and a linear compressor, the one-way valve structure comprising a sealing valve body, a sealing valve stem and a supporting structure; the sealing valve body is arranged between a first chamber and a second chamber, and a fluid channel that can connect the first chamber and the second chamber is provided on the sealing valve body, and the sealing valve stem can extend into the fluid channel under the action of the pressure difference between the first chamber and the second chamber to seal the fluid channel or move in a direction away from the fluid channel to open the fluid channel; the supporting structure is used to radially support the sealing valve stem, and the supporting structure has elasticity along the axial direction of the sealing valve stem, so that when the sealing valve stem seals the fluid channel, a gap seal is formed between the sealing valve stem and the fluid channel, thereby improving the reliability and service life of the one-way valve, and further improving the reliability and stability of the linear compressor having the one-way valve structure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of one-way valves, and in particular to a one-way valve structure and a linear compressor. Background Art

[0002] A one-way valve, also known as a check valve, is a valve used to prevent the reverse flow of fluid.

[0003] The existing one-way valve structure usually includes a valve body and a valve plate. The valve body has a valve hole. One end of the valve plate is fixed outside the valve hole, and the other end of the valve plate elastically blocks the valve hole. When gas is discharged from the valve hole, the valve plate is pushed open by the gas; when gas flows toward the valve hole, the valve plate blocks the valve hole.

[0004] However, when the existing one-way valve is in use, the valve disc may contact the valve body or even collide with it. Long-term operation may cause wear or damage to the valve disc and the valve body, affecting the reliability and service life of the one-way valve. Summary of the Invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a one-way valve structure and a linear compressor.

[0006] In a first aspect, the present disclosure provides a one-way valve structure, which is disposed in a housing, wherein the housing has a first chamber and a second chamber, and the one-way valve structure includes a sealing valve body, a sealing valve stem, and a support structure;

[0007] The sealing valve body is disposed between the first chamber and the second chamber, and is provided with a fluid passage capable of communicating the first chamber and the second chamber. The sealing valve stem can extend into the fluid passage to seal the fluid passage or move away from the fluid passage to open the fluid passage under the action of a pressure difference between the first chamber and the second chamber.

[0008] The support structure is used to radially support the sealing valve stem, and the support structure has elasticity along the axial direction of the sealing valve stem, so that when the sealing valve stem seals the fluid channel, a gap seal is formed between the sealing valve stem and the fluid channel.

[0009] Optionally, the support structure includes a leaf spring assembly;

[0010] The leaf spring assembly is arranged on one side of the sealing valve body; the leaf spring assembly includes a leaf spring, which is provided with a through hole coaxial with the fluid channel, and the sealing valve stem is inserted into the through hole and fixed relative to the hole wall of the through hole.

[0011] Optionally, a step surface is provided on the outer side wall of the sealing valve stem, and the step surface is blocked on one side of the leaf spring assembly. A first fastener is provided on the other side of the leaf spring assembly, and the first fastener is sleeved on the sealing valve stem to connect the sealing valve stem to the leaf spring assembly.

[0012] Optionally, the sealing valve stem has a fixing portion, which is located on a side of the leaf spring assembly away from the sealing valve body. The leaf spring assembly is provided with a mounting hole, and the leaf spring assembly is connected to the fixing portion via a second fastener passing through the mounting hole.

[0013] Optionally, the leaf spring includes a base plate, and the through hole is provided at the axis of the base plate;

[0014] A connecting portion for fixing the leaf spring in the housing is provided on the outer edge of the base plate.

[0015] Optionally, the leaf spring is a vortex arm leaf spring.

[0016] Optionally, there are at least two leaf springs, and the sealing valve stem is supported in the housing by the at least two leaf springs;

[0017] At least two of the leaf springs are concentric and stacked along the axial direction of the sealing valve stem, and the sealing valve stem is inserted into each of the through holes on the at least two leaf springs.

[0018] Optionally, the support structure includes a radial support structure and an elastic member;

[0019] The radial support structure is used to radially support the sealing valve stem, so that when the sealing valve stem seals the fluid channel, a gap seal is formed between the sealing valve stem and the fluid channel;

[0020] The elastic member is located on one side of the sealing valve body, the deformation direction of the elastic member is consistent with the axial direction of the fluid channel, one end of the elastic member is relatively fixed to the shell, and the sealing valve stem is connected to the other end of the elastic member.

[0021] Optionally, the radial support structure includes a rigid support member;

[0022] The rigid support member is provided on one side of the sealing valve body; the rigid support member is relatively fixed to the housing, and a support hole coaxial with the fluid channel is provided on the rigid support member, and the sealing valve stem is passed through the support hole and can move along the axial direction of the support hole;

[0023] The elastic member is located on a side of the rigid support member away from the sealing valve body.

[0024] Optionally, a linear bearing is provided in the support hole;

[0025] The outer cylinder of the linear bearing is relatively fixed to the hole wall of the support hole, and the sealing valve stem is passed through the inner cylinder of the linear bearing and relatively fixed to the cylinder wall of the inner cylinder.

[0026] Optionally, the elastic member is a helical compression spring.

[0027] Optionally, the radial support structure includes a first air supply channel provided on the sealing valve stem; the first air supply channel has a first air inlet for allowing support gas to enter and a first exhaust port for allowing support gas to be discharged; the first exhaust port is communicated with the fluid channel, and the first exhaust port is arranged toward the inner wall of the fluid channel; the first air supply channel is used to circumferentially deliver support gas to the inner wall of the fluid channel, so that the support gas radially supports the sealing valve stem;

[0028] and / or,

[0029] The radial support structure includes a second air supply channel arranged on the sealing valve body; the second air supply channel has a second air inlet for allowing support gas to enter and a second exhaust port for allowing support gas to be discharged; the second exhaust port is opened on the inner wall of the fluid channel, and the second exhaust port is arranged toward the sealing valve stem; the second air supply channel is used to transport support gas to the circumference of the sealing valve stem, so that the support gas radially supports the sealing valve stem.

[0030] Optionally, there are multiple first exhaust ports, and all of the first exhaust ports are arranged at intervals along the circumference of the sealing valve stem;

[0031] Alternatively, there are multiple first exhaust ports, and among all the first exhaust ports, some of the first exhaust ports are arranged at intervals along the circumference of the sealing valve stem, and some of the first exhaust ports are arranged at intervals along the axial direction of the sealing valve stem.

[0032] Optionally, the first exhaust port is an annular exhaust port extending along the circumference of the sealing valve stem.

[0033] Optionally, there are multiple first exhaust ports, and the multiple first exhaust ports are arranged at intervals along the axial direction of the sealing valve stem.

[0034] Optionally, there are multiple second exhaust ports, and all of the second exhaust ports are arranged at intervals along the circumferential direction of the inner wall of the fluid channel;

[0035] Alternatively, there are a plurality of second exhaust ports, and among all the second exhaust ports, some of the second exhaust ports are arranged at intervals along the circumferential direction of the inner wall of the fluid channel, and some of the second exhaust ports are arranged at intervals along the axial direction of the fluid channel.

[0036] Optionally, the second exhaust port is an annular exhaust port extending along the circumference of the fluid channel.

[0037] Optionally, there are multiple second exhaust ports, and the multiple second exhaust ports are arranged at intervals along the axial direction of the fluid channel.

[0038] Optionally, the radial support structure further includes a rigid support member;

[0039] The rigid support member is provided on one side of the sealing valve body; the rigid support member is relatively fixed to the housing, and a support hole coaxial with the fluid channel is provided on the rigid support member, and the sealing valve stem is passed through the support hole and can move along the axial direction of the support hole;

[0040] The elastic member is located on a side of the rigid support member away from the sealing valve body.

[0041] Optionally, the support structure includes at least two spring plates, which are radially arranged along the circumference of the sealing valve stem, one end of the spring plate is connected to the sealing valve stem, and the other end of the spring plate is fixed relative to the shell.

[0042] Optionally, when the sealing valve stem seals the fluid channel, a gap between the sealing valve stem and an inner wall of the fluid channel is no greater than 20 μm.

[0043] Optionally, the outer contour dimension of the entry end of the sealing valve stem is smaller than the outer contour dimension of the remaining portion of the sealing valve stem;

[0044] And / or, a size of one end of the fluid channel is larger than a size of the rest of the fluid channel, wherein the one end of the fluid channel is the end of the fluid channel close to the entrance end of the sealing valve stem when the fluid channel is in an open state.

[0045] Optionally, the entry end of the sealing valve stem is formed into a conical structure;

[0046] And / or, one end of the fluid channel is formed as a trumpet-shaped expanded end.

[0047] Optionally, a first fluid groove is formed on an outer side wall of the entrance end of the sealing valve stem, and the first fluid groove extends along the axial direction of the sealing valve stem to achieve communication between the first chamber and the second chamber when the sealing valve stem is not completely separated from the sealing valve body;

[0048] And / or, a second fluid groove is provided on the inner wall of one end of the fluid channel, and the second fluid groove extends along the axial direction of the fluid channel to achieve conduction between the first chamber and the second chamber when the sealing valve stem is not completely separated from the sealing valve body; wherein, one end of the fluid channel is the end of the fluid channel close to the entrance end of the sealing valve stem when the fluid channel is in an open state.

[0049] Optionally, there are multiple first fluid grooves, and the multiple first fluid grooves are evenly distributed along the circumference of the entry end;

[0050] There are a plurality of second fluid grooves, and the plurality of second fluid grooves are evenly distributed along the circumference of one end of the fluid channel.

[0051] Optionally, the notch edge of the first fluid groove is rounded;

[0052] The slot edge of the second fluid slot is rounded.

[0053] Optionally, a first fluid channel is opened at one end of the sealing valve body, and the first fluid channel is connected to the fluid channel to achieve conduction between the first chamber and the second chamber when the sealing valve stem is not completely separated from the sealing valve body; wherein, one end of the sealing valve body is the end of the sealing valve body close to the entry end of the sealing valve stem when the fluid channel is in an open state.

[0054] Optionally, in the direction of moving along the sealing valve stem to open the fluid channel, the first fluid channel extends obliquely from the inner wall of the fluid channel toward a direction away from the fluid channel.

[0055] Optionally, there are multiple first fluid channels, and the multiple first fluid channels are arranged at intervals along the circumference of the sealing valve body;

[0056] Alternatively, the first fluid channel is a tapered channel arranged along the circumference of the sealing valve body, and a connecting support member for supporting the tapered channel is provided in the housing.

[0057] Optionally, a second fluid channel is provided on the sealing valve stem, and the fluid inlet of the second fluid channel is located at the entry end of the sealing valve stem and is connected to the fluid channel to achieve conduction between the first chamber and the second chamber when the sealing valve stem is not completely separated from the sealing valve body.

[0058] Optionally, the second fluid channel has a plurality of fluid outlets, and the plurality of fluid outlets are arranged at intervals along the circumference of the sealing valve stem;

[0059] Alternatively, the fluid outlet of the second fluid channel is an annular fluid outlet arranged along the circumference of the sealing valve stem.

[0060] In a second aspect, the present disclosure provides a linear compressor comprising the one-way valve structure as described above and the housing.

[0061] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0062] The one-way valve structure and linear compressor provided by the present disclosure are configured to include a sealing valve body, a sealing valve stem, and a support structure. A fluid channel is provided on the sealing valve body, so that the sealing valve stem can move under the action of the pressure difference between the first chamber and the second chamber of the housing where the one-way valve structure is located, thereby extending into the fluid channel to seal the fluid channel or moving in a direction away from the fluid channel to open the fluid channel. The sealing valve stem is supported within the housing by the support structure, and the support structure radially supports the sealing valve stem. That is, the support structure has a radial supporting function and can provide a stable supporting force for the sealing valve stem in the radial direction, so that the sealing valve stem does not undergo significant radial displacement when entering and exiting the fluid channel. Therefore, the sealing valve stem and the fluid channel can operate contactlessly with a very small gap, that is, a gap seal is formed, thereby reducing or even eliminating wear between the sealing valve stem and the fluid channel, that is, reducing or even eliminating wear between the sealing valve stem and the sealing valve body, greatly improving the reliability and service life of the one-way valve, and thereby improving the reliability and stability of the linear compressor having the one-way valve structure. Moreover, since the support structure is elastic along the axial direction of the sealing valve stem, the support structure can also provide axial support force to the sealing valve stem, so that the sealing valve stem moves more smoothly under the action of pressure difference, thereby improving the efficiency of the equipment using the one-way valve structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0064] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0065] Figure 1A This is a structural schematic diagram 1 of the one-way valve structure in an open state according to an embodiment of the present disclosure;

[0066] Figure 1B for Figure 1AA schematic structural diagram of the sealing valve stem in FIG. 1 when it is connected to the leaf spring assembly via a first fastener;

[0067] Figure 1C for Figure 1A A schematic structural diagram of the sealing valve stem in FIG. 1 when it is connected to the leaf spring assembly via a second fastener;

[0068] Figure 2 This is a structural schematic diagram 1 of the one-way valve structure in a closed state according to an embodiment of the present disclosure;

[0069] Figure 3 The structure of the one-way valve structure in the open state according to the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0070] Figure 4 The structure of the one-way valve structure in the open state according to the embodiment of the present disclosure is shown in FIG. Figure 3 ;

[0071] Figure 5 for Figure 4 A three-dimensional structural diagram of the sealing valve body and the sealing valve stem;

[0072] Figure 6A The structure of the one-way valve structure in the open state according to the embodiment of the present disclosure is shown in FIG. Figure 4 ;

[0073] Figure 6B The structure of the one-way valve structure in the open state according to the embodiment of the present disclosure is shown in FIG. Figure 5 ;

[0074] Figure 7 This is a schematic structural diagram of a leaf spring according to an embodiment of the present disclosure;

[0075] Figure 8 The structure of the one-way valve structure in the closed state according to the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0076] Figure 9A The structure of the one-way valve structure in the closed state according to the embodiment of the present disclosure is shown in FIG. Figure 3 ;

[0077] Figure 9B The structure of the one-way valve structure in the closed state according to the embodiment of the present disclosure is shown in FIG. Figure 4 ;

[0078] Figure 9C The structure of the one-way valve structure in the closed state according to the embodiment of the present disclosure is shown in FIG. Figure 5 ;

[0079] Figure 10This is a schematic diagram of the partial structure of the linear compressor described in an embodiment of the present disclosure.

[0080] Among them, 1. one-way valve structure; 11. sealing valve body; 111. fluid channel; 112. second fluid groove; 113. first fluid channel; 12. sealing valve stem; 121. inlet end; 122. first fluid groove; 123. second fluid channel; 1231. fluid inlet; 1232. fluid outlet; 124. step surface; 125. fixing portion; 126. first fastener; 127. second fastener; 13. supporting structure; 130. substrate; 131. through hole; 132. connecting portion; 133. Spiral arm; 134. Rigid support member; 1341. Support hole; 135. Elastic member; 136. Mounting hole; 137. First air supply channel; 1371. First air inlet; 1372. First exhaust port; 138. Second air supply channel; 1381. Second air inlet; 1382. Second exhaust port; 2. Linear compressor; 20. Housing; 21. First chamber; 22. Second chamber; 221. Exhaust port; 222. Air inlet; 23. Cylinder; 24. Piston; 25. Motor. DETAILED DESCRIPTION

[0081] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0082] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0083] This embodiment provides a one-way valve structure and a linear compressor using the one-way valve structure, which can reduce or even eliminate the wear between the sealing valve stem and the sealing valve body to a certain extent, thereby improving the reliability and service life of the one-way valve.

[0084] The one-way valve structure and the linear compressor are described in detail below through specific embodiments:

[0085] Example 1

[0086] Reference Figure 1A 、 Figure 1B 、 Figure 1C and Figure 2 As shown, this embodiment provides a one-way valve structure 1 , which is disposed in a housing 20 . The housing 20 has a first chamber 21 and a second chamber 22 .

[0087] The one-way valve structure 1 includes a sealing valve body 11, a sealing valve stem 12, and a support structure 13. The sealing valve body 11 is disposed between a first chamber 21 and a second chamber 22, and has a fluid passage 111 thereon that connects the first chamber 21 and the second chamber 22. The sealing valve stem 12 can extend into the fluid passage 111 to seal the fluid passage 111 or move away from the fluid passage 111 to open the fluid passage 111 under the action of a pressure differential between the first chamber 21 and the second chamber 22.

[0088] The support structure 13 is used to radially support the sealing valve stem 12. The support structure 13 is elastic along the axial direction of the sealing valve stem 12, so that when the sealing valve stem 12 seals the fluid channel 111, a gap seal is formed between the sealing valve stem 12 and the fluid channel 111. In other words, the seal between the sealing valve stem 12 and the fluid channel 111 is a non-contact gap seal. Furthermore, it is understood that the support structure 13 provides both radial support and axial elasticity.

[0089] For example, refer to Figure 1A As shown, when the first chamber 21 on the right is a high-pressure chamber and the second chamber 22 on the left is a low-pressure chamber, since the pressure in the first chamber 21 is greater than the pressure in the second chamber 22, the sealing valve stem 12 will move to the left under the action of the pressure difference, that is, move toward the second chamber 22, and then move out of the fluid channel 111. At this time, the fluid channel 111 is open, and the fluid in the first chamber 21 flows to the second chamber 22 through the fluid channel 111 driven by the pressure difference. At this time, the one-way valve structure 1 is in an open state.

[0090] Reference Figure 2 As shown, when the second chamber 22 on the left is a high-pressure chamber and the first chamber 21 on the right is a low-pressure chamber, since the pressure in the second chamber 22 is greater than the pressure in the first chamber 21, the sealing valve stem 12 will move to the right under the action of the pressure difference, that is, the sealing valve stem 12 enters the fluid channel 111. Since the support structure 13 radially supports the sealing valve stem 12 and supports the sealing valve stem 12 in the housing 20, that is, provides a stable supporting force for the sealing valve stem 12 in the radial direction, when the sealing valve stem 12 enters the fluid channel 111, the sealing valve stem 12 has high radial stability, there is no contact or collision between the sealing valve stem 12 and the inner wall of the fluid channel 111, and a good gap seal is formed between the sealing valve stem 12 and the fluid channel 111.

[0091] Those skilled in the art will understand that a gap seal is defined as a very small gap between two mating components, allowing for non-contact operation with this very small gap while maintaining a seal. In other words, a gap fit is formed between the sealing valve stem 12 and the fluid channel 111, meaning that the sealing valve stem 12 and the inner wall of the fluid channel 111 are not only sealed but also non-contacting.

[0092] In practice, the gap between the sealing valve stem 12 and the fluid channel 111 is as small as micrometers. When the sealing valve stem 12 enters the fluid channel 111, due to the small gap between the two, a significant viscous resistance is present. The pressure differential between the first chamber 21 and the second chamber 22 is insufficient to overcome the viscous resistance between the sealing valve stem 12 and the sealing valve body 11. Therefore, the fluid in the high-pressure chamber cannot flow into the low-pressure chamber, and the one-way valve structure is now closed.

[0093] In some embodiments, when the sealing valve stem 12 seals the fluid channel 111, the gap between the sealing valve stem 12 and the inner wall of the fluid channel 111 is no greater than 20 μm. In other words, the support structure 13 controls the gap between the sealing valve stem 12 and the inner wall of the fluid channel 111 to the micrometer level, significantly reducing wear between the sealing valve stem 12 and the sealing valve body 11, improving the sealing effect, and increasing the reliability and service life of the moving parts.

[0094] The one-way valve structure 1 is particularly suitable for the compressor field, because under high-frequency motion of the compressor, the time for the fluid to pass through the sealing area of the sealing valve stem gap is very short and an effective flow channel cannot be established, so the sealing effect is good.

[0095] The following further describes the one-way valve structure 1 by taking the use of the one-way valve structure 1 on the linear compressor 2 as an example:

[0096] Reference Figure 10 As shown ( Figure 10 The sealing valve stem and the supporting structure are not shown in the figure), the linear compressor 2 includes: a housing 20 and a piston 24, a cylinder 23, a motor 25 and a one-way valve structure 1 arranged in the housing 20.

[0097] The housing 20 includes a first chamber 21 and a second chamber 22, wherein a motor 25 is used to drive a piston 24 to move linearly back and forth in a cylinder 23. The cylinder working chamber is formed as the first chamber 21, and the valve chamber on one side of the cylinder working chamber is formed as the second chamber 22. The valve chamber specifically includes an intake valve chamber and an exhaust valve chamber, wherein the intake valve chamber has an intake port 222, and the exhaust valve chamber has an exhaust port 221, that is, both the intake valve chamber and the exhaust valve chamber can serve as the second chamber 22. A one-way valve structure is provided between the cylinder working chamber and the valve chamber. In this embodiment, a one-way valve structure 1 is provided between the cylinder working chamber and the intake valve chamber, and a one-way valve structure 1 is also provided between the cylinder working chamber and the exhaust valve chamber.

[0098] The piston 24 moves back and forth in the cylinder 23 under the driving action of the motor 25, thereby changing the pressure of the first chamber 21 and forming a pressure difference between the first chamber 21 and the second chamber 22, thereby realizing the opening or closing of the one-way valve structure 1.

[0099] Reference Figure 3 As shown, the fluid channel 111 of the one-way valve structure 1 located at the top can connect the cylinder working chamber and the exhaust valve chamber, and the fluid channel 111 of the one-way valve structure 1 located at the bottom can connect the cylinder working chamber and the intake valve chamber. When the piston 24 moves to the right (i.e., backward) due to the driving action of the motor 25, it is the intake process. During this process, since the pressure in the cylinder working chamber is lower than the pressure in the intake valve chamber, the one-way valve structure 1 located between the intake valve chamber and the cylinder working chamber opens. When the piston 24 moves to the left (i.e., forward), the pressure of the gas in the cylinder working chamber increases due to compression. When the pressure in the cylinder working chamber is higher than the pressure in the exhaust valve chamber, the one-way valve structure 1 located between the exhaust valve chamber and the cylinder working chamber opens, and this process is the exhaust process.

[0100] It should be noted that the one-way valve structure of this embodiment is not only applicable to compressors, but also to other equipment that requires the installation of a one-way valve.

[0101] In this embodiment, the one-way valve structure 1 is configured to include a sealing valve body 11, a sealing valve stem 12 and a support structure 13, and a fluid channel 111 is provided on the sealing valve body 11, so that the sealing valve stem 12 can move under the pressure difference between the first chamber 21 and the second chamber 22 of the housing 20 where the one-way valve structure 1 is located, so as to extend into the fluid channel 111 to seal the fluid channel 111 or move in a direction away from the fluid channel 111 to open the fluid channel 111, and the sealing valve stem 12 is supported in the housing 20 by the support structure 13, and the support structure 13 radially supports the sealing valve stem 12. In other words, the support structure 13 has a radial supporting function, which can provide a stable supporting force in the radial direction for the sealing valve stem 12, so that the sealing valve stem 12 does not undergo significant radial displacement when entering and exiting the fluid channel 111. This allows the sealing valve stem 12 and the fluid channel 111 to operate non-contact with a very small gap, that is, a gap seal is formed, thereby reducing or even eliminating the wear between the sealing valve stem 12 and the fluid channel 111, that is, reducing or even eliminating the wear between the sealing valve stem 12 and the fluid channel 111, that is, reducing or even eliminating the wear between the sealing valve stem 12 and the sealing valve body 11, and greatly improving the reliability and service life of the one-way valve structure 1. Moreover, because the support structure 13 has an axial elastic force, it can also provide an axial elastic force to the sealing valve stem 12, so that the sealing valve stem moves more smoothly under the action of the pressure differential, thereby improving the efficiency of the equipment using the one-way valve structure 1, such as improving the reliability and stability of the linear compressor using the one-way valve structure 1.

[0102] Reference Figure 1A 、 Figure 1B 、 Figures 1C to 7 As shown, in a first feasible implementation of the support structure 13, the support structure 13 specifically includes a leaf spring assembly, which is arranged on one side of the sealing valve body 11. The leaf spring assembly includes a leaf spring, Figure 7 As shown, the leaf spring has a through hole 131 coaxial with the fluid channel 111, and the sealing valve stem 12 is passed through the through hole 131 and fixed relatively to the hole wall of the through hole 131, so that when the sealing valve stem 12 seals the fluid channel 111, a gap seal is formed between the sealing valve stem 12 and the fluid channel 111.

[0103] Since the leaf spring has a high radial stiffness, it can provide more reliable support for the sealing valve stem 12 in the radial direction, further improving the stability of the sealing valve stem 12. At the same time, the leaf spring has elastic force in the axial direction, which can provide axial support for the sealing valve stem 12, allowing the sealing valve stem 12 to move more smoothly under the action of the pressure difference.

[0104] Since the sealing valve stem 12 is supported by the leaf spring assembly, the long-term operating reliability of the sealing valve stem 12 depends on the life of the leaf spring. The life of the leaf spring has reached a very high level. Therefore, supporting the sealing valve stem 12 by the leaf spring can further ensure the reliability and long life of the one-way valve structure 1.

[0105] Reference Figure 7 As shown, the leaf spring specifically includes a base plate 130, which can be, for example, a circular base plate. The through hole 131 is provided at the axis of the base plate 130. The base plate 130 is provided with a plurality of spiral arms 133 distributed circumferentially. In some embodiments, a connecting portion 132 for fixing the leaf spring in the housing 20 is provided on the outer edge of the base plate 130. Exemplarily, the connecting portion 132 includes, for example, a connecting hole, and the leaf spring is fixed in the housing 20 by a fastener such as a screw inserted into the connecting hole. In another example, the connecting portion 132 includes an outwardly extending connecting lug provided on the edge of the base plate 130, and the connecting lug is provided with a connecting hole.

[0106] In this embodiment, the leaf spring is specifically a vortex arm leaf spring. Of course, in other implementations, the leaf spring may also be a positive spiral arm leaf spring or other types of leaf springs, as long as they can provide a stable support force to the sealing valve stem 12 in the radial direction and meet a certain axial support force.

[0107] Continue to refer to Figure 1A 、 Figure 1B 、 Figure 1C and Figure 2As shown, in a specific implementation, at least two leaf springs can be provided, and the sealing valve stem 12 is supported within the housing 20 by the at least two leaf springs. The at least two leaf springs are concentrically arranged and stacked along the axial direction of the sealing valve stem 12. The sealing valve stem 12 is inserted into each through-hole 131 of the at least two leaf springs. In other words, the at least two leaf springs are arranged axially along the sealing valve stem 12. The simultaneous support of the sealing valve stem 12 by the at least two leaf springs further enhances the support effect of the sealing valve stem 12, and more effectively ensures that the sealing valve stem 12 can establish a gap seal with the fluid channel 111.

[0108] Refer to the following Figure 1B and Figure 1C The specific connection method between the sealing valve stem 12 and the leaf spring assembly is described as follows:

[0109] Reference Figure 1B Specifically, a step surface 124 can be provided on the outer side wall of the sealing valve stem 12, and the step surface 124 is provided on one side of the leaf spring assembly. A first fastener 126 is provided on the other side of the leaf spring assembly. The first fastener 126 is sleeved on the sealing valve stem 12 to connect the sealing valve stem 12 to the leaf spring assembly.

[0110] The step surface 124 can be located on the side of the leaf spring assembly close to the sealing valve body 11, and the first fastener 126 is located on the side of the leaf spring assembly away from the sealing valve body 11. Figure 1B and Figure 7 As shown, the outer diameter of the right half of the sealing valve stem 12 (i.e., the portion located on the right side of the leaf spring assembly) can be larger than the outer diameter of the left half of the sealing valve stem 12 (i.e., the portion inserted into the leaf spring assembly and the portion located on the left side of the leaf spring assembly). This allows the junction of the two portions to form the aforementioned stepped surface 124. In a specific implementation, a gasket is provided between adjacent leaf springs. The first fastener 126 can be a nut. During assembly, the sealing valve stem 12 is inserted into the leaf spring assembly, and then the leaf spring assembly and the sealing valve stem 12 are locked together using the nut.

[0111] Of course, the stepped surface 124 can also be located on the side of the leaf spring assembly away from the sealing valve body 11, and the first fastener 126 can be located on the side of the leaf spring assembly closer to the sealing valve body 11. In this case, when the sealing valve stem 12 completes sealing the fluid channel 111, the first fastener 126 is located outside the fluid channel 111 and does not affect the normal gap sealing. In addition, the first fastener 126 can also be other structures that can lock the leaf spring assembly and the sealing valve stem together.

[0112] Reference Figure 1CAlternatively, the sealing valve stem 12 may include a fixing portion 125 located on a side of the leaf spring assembly away from the sealing valve body 11. The leaf spring assembly may include a mounting hole 136, and the leaf spring assembly may be connected to the fixing portion 125 via a second fastener 127 inserted into the mounting hole 136. In a specific implementation, the second fastener 127 may be, for example, a screw, and the mounting holes 136 may be multiple. The multiple mounting holes 136 are spaced apart along the circumference of the leaf spring. Accordingly, the second fastener 127 may also be multiple, with one second fastener 127 corresponding to one mounting hole 136. Of course, the second fastener 127 may also be another structure capable of connecting the leaf spring assembly to the fixing portion.

[0113] Reference Figures 8 to 9C As shown, in a second possible implementation of the support structure 13, the support structure 13 includes a radial support structure and an elastic member 135. The radial support structure is used to radially support the sealing valve stem 12, so that when the sealing valve stem 12 seals the fluid channel 111, a gap seal is formed between the sealing valve stem 12 and the fluid channel 111. It will be appreciated that the radial support structure can also provide radial support for the sealing valve stem 12 when the fluid channel 111 is open.

[0114] Among them, the elastic member 135 is located on one side of the sealing valve body 11, the deformation direction of the elastic member 135 is consistent with the axial direction of the fluid channel 111, one end of the elastic member 135 is relatively fixed to the shell 20, and the sealing valve stem 12 is connected to the other end of the elastic member 135.

[0115] For example, the elastic member 135 may be a helical compression spring. One end of the elastic member 135 is Figure 8 The left end of the elastic member 135 and the other end of the elastic member 135 are Figure 8 Of course, the elastic member 135 can also be an elastic structure such as an elastic column, an elastic strip, etc. whose deformation direction is consistent with the axial direction of the fluid channel 111.

[0116] That is to say, radial support of the sealing valve stem 12 is achieved through the radial support structure, and axial elastic force is provided by the elastic member 135 .

[0117] Continue to refer to Figure 8 As shown, in a first optional implementation of the radial support structure, the radial support structure includes a rigid support member 134, which is disposed on one side of the sealing valve body 11. The rigid support member 134 is fixed relative to the housing 20. The rigid support member 134 defines a support hole 1341 coaxial with the fluid channel 111. The sealing valve stem 12 is disposed in the support hole 1341 and is movable axially along the support hole 1341.

[0118] For example, the rigid support member 134 is a rigid support plate, the center of which is provided with the support hole 1341, and the outer peripheral edge of the rigid support plate is fixedly connected to the housing 20, for example, by welding. The elastic member 135 is located on the side of the rigid support member 134 away from the sealing valve body 11. It should be noted that the side of the rigid support member 134 away from the sealing valve body 11 is the Figure 8 The left side of the middle rigid support 134 .

[0119] Specifically, the rigid support member 134 provides radial support to the sealing valve stem 12, and the elastic member 135 provides axial elastic force to the sealing valve stem 12. Similarly, when the sealing valve stem 12 seals the fluid channel 111, a gap seal is formed between the sealing valve stem 12 and the fluid channel 111, and the sealing valve stem 12 moves more smoothly under the action of pressure difference.

[0120] In specific implementation, a linear bearing is provided in the support hole 1341, the outer cylinder of the linear bearing is relatively fixed to the hole wall of the support hole 1341, the sealing valve stem 12 is passed through the inner cylinder of the linear bearing and is relatively fixed to the cylinder wall of the inner cylinder, thereby further ensuring the smooth movement of the sealing valve stem 12.

[0121] Reference Figure 9A As shown, in a second optional implementation of the radial support structure, the radial support structure includes a first air supply channel 137 disposed on the sealing valve stem 12. The first air supply channel 137 has a first air inlet 1371 for allowing support gas to enter and a first air outlet 1372 for allowing support gas to exit. The first air outlet 1372 is connected to the fluid channel 111 and is disposed toward the inner wall of the fluid channel 111. The first air supply channel 137 is used to circumferentially deliver support gas to the inner wall of the fluid channel 111 so that the support gas radially supports the sealing valve stem 12. Specifically, when the sealing valve stem 12 seals the fluid channel 111, a gap seal is formed between the sealing valve stem 12 and the fluid channel 111. In other words, radial support of the sealing valve stem 12 is achieved through the principle of air flotation.

[0122] Specifically, there may be a plurality of first exhaust ports 1372. For example, the plurality of first exhaust ports 1372 may be arranged at intervals along the circumference of the sealing valve stem 12 to deliver support gas from the circumference of the sealing valve stem 12, and provide radial support force to the sealing valve stem 12 through the airflow of the support gas. For another example, among the plurality of first exhaust ports 1372, some of the first exhaust ports 1372 may be arranged at intervals along the circumference of the sealing valve stem 12, and some of the first exhaust ports may be arranged at intervals along the axial direction of the sealing valve stem 12. In other words, there may be a plurality of groups of first exhaust ports arranged at intervals along the axial direction of the sealing valve stem 12, and each group of first exhaust ports includes a plurality of first exhaust ports 1372 arranged at intervals along the circumference of the sealing valve stem 12, thereby further improving the support effect on the sealing valve stem 12.

[0123] Of course, there can be only one first exhaust port 1372. For example, the first exhaust port 1372 can be an annular exhaust port extending along the circumference of the sealing valve stem 12. Furthermore, when the first exhaust port 1372 is an annular exhaust port extending along the circumference of the sealing valve stem 12, there can also be multiple first exhaust ports 1372, with the multiple annular exhaust ports being arranged at intervals along the axial direction of the sealing valve stem 12, thereby further improving the support effect on the sealing valve stem 12.

[0124] It should be noted that when there are multiple first exhaust ports 1372, there may be one or more first air inlet ports 1371. For example, if there is one first air supply channel 137, the first air supply channel 137 may have one first air inlet port 1371 and multiple first exhaust ports 1372. For another example, if there are multiple first air supply channels 137, one first air supply channel 137 may have one first air inlet port 1371 and one first exhaust port 1372.

[0125] Continue to refer to Figure 9A As shown, in this implementation, the first air inlet 1371 is specifically opened on the side wall of the sealing valve stem 12. Of course, the first air inlet 1371 can also be opened at the end of the sealing valve stem 12, as long as the support gas can enter and be discharged from the first exhaust port 1372.

[0126] Reference Figure 9B As shown, in a third optional implementation of the radial support structure, the radial support structure may also include a rigid support member 134 and a first air supply channel 137 at the same time, thereby achieving a better radial support effect on the sealing valve stem 12 .

[0127] Reference Figure 9CAs shown, in a fourth optional implementation of the radial support structure, the radial support structure includes a second air supply channel 138 provided on the sealing valve body 11. The second air supply channel 138 has a second air inlet 1381 for the support gas to enter and a second exhaust port 1382 for the support gas to exhaust. The second exhaust port 1382 is provided on the inner wall of the fluid channel 111, and the second exhaust port 1382 is arranged toward the sealing valve stem 12. The second air supply channel 138 is used to deliver support gas to the circumference of the sealing valve stem 12 so that the support gas radially supports the sealing valve stem 12. That is, when the sealing valve stem 12 seals the fluid channel 111, a gap seal is formed between the sealing valve stem 12 and the fluid channel 111. That is, radial support of the sealing valve stem 12 is achieved through the air flotation principle.

[0128] Specifically, there may be a plurality of second exhaust ports 1382. For example, the plurality of second exhaust ports 1382 may be arranged at intervals along the circumferential direction of the inner wall of the fluid channel 111, so as to deliver support gas from the circumference of the sealing valve stem 12, and provide radial support force to the sealing valve stem 12 through the airflow of the support gas. For another example, among the plurality of second exhaust ports 1382, some of the second exhaust ports 1382 may be arranged at intervals along the circumferential direction of the inner wall of the fluid channel 111, and some of the second exhaust ports 1382 may be arranged at intervals along the axial direction of the fluid channel 111. In other words, multiple groups of second exhaust ports may be arranged at intervals along the axial direction of the inner wall of the fluid channel 111, and each group of second exhaust ports includes multiple second exhaust ports 1382 arranged at intervals along the circumferential direction of the inner wall of the fluid channel 111.

[0129] Of course, there can be only one second exhaust port 1382. For example, the second exhaust port 1382 can be an annular exhaust port extending circumferentially along the inner wall of the fluid channel 111. Furthermore, when the second exhaust port 1382 is an annular exhaust port extending circumferentially along the inner wall of the fluid channel 111, multiple second exhaust ports 1382 can also be provided, with the multiple annular exhaust ports being arranged at intervals along the axial direction of the fluid channel 111. This can further enhance the support effect on the sealing valve stem 12.

[0130] It should be noted that when there are multiple second exhaust ports 1382, there may be one or more second air inlets 1381. For example, if there is one second air supply channel 138, the first air supply channel 138 may have one second air inlet 1381 and multiple second exhaust ports 1382. For another example, if there are multiple second air supply channels 138, one second air supply channel 138 may have one second air inlet 1381 and one second exhaust port 1382.

[0131] Continue to refer to Figure 9CAs shown, in this implementation, the second air inlet 1381 is specifically opened on the left side of the sealing valve body 11. Of course, the second air inlet 1381 can also be opened on the right side of the sealing valve body 11, or opened at the upper end or lower end of the sealing valve body 11.

[0132] In a fifth optional implementation of the radial support structure, the radial support structure may also include a first air supply channel 137 and a second air supply channel 138. In this case, the first exhaust port 1372 of the first air supply channel 137 and the second exhaust port 1382 of the second air supply channel 138 may be arranged relative to each other or staggered. Specifically, stable support for the sealing valve stem 12 may be achieved by controlling the gas outflow speed / flow rate of the first exhaust port 1372 and the gas outflow speed / flow rate of the second exhaust port 1382.

[0133] In addition, the radial support structure may also include the rigid support member 134 and the second air supply channel 138 at the same time, or include the rigid support member 134, the first air supply channel 137 and the second air supply channel 138 at the same time.

[0134] The specific type of the supporting gas delivered by the first air supply channel 137 and the second air supply channel 138 is not particularly limited in this embodiment, as long as it can effectively radially support the sealing valve stem 12 and will not react with the gas in the one-way valve operating environment.

[0135] The support gas can come from a high-pressure chamber. For example, the first chamber 21 is a high-pressure chamber, and the first air inlet 1371 and the second air inlet 1381 are both connected to the first chamber 21. Alternatively, a support gas supply mechanism can be provided, and the first air inlet 1371 and the second air inlet 1381 are connected to the support gas supply mechanism, that is, external high-pressure gas is connected, and the support gas is delivered to the first air supply channel 137 and the second air supply channel 138 through the support gas supply mechanism.

[0136] Of course, in other implementations, the support structure 13 may also be other structures with radial support and axial elasticity.

[0137] Further, in some embodiments, referring to Figure 3 As shown, the outer contour size of the entry end 121 of the sealing valve stem 12 can be made smaller than the outer contour size of the rest of the sealing valve stem 12. Here, the entry end 121 of the sealing valve stem 12 is Figure 3 At the same time, the size of one end of the fluid channel 111 is larger than the size of the rest of the fluid channel 111. When the fluid channel 111 is in the open state, the end of the fluid channel 111 is close to the inlet end 121 of the sealing valve stem 12. Figure 3The left end of the middle fluid channel 111 is larger than the rest of the fluid channel 111. This arrangement allows ventilation to be achieved without completely removing the sealing valve stem 12 from the fluid channel 111 when the one-way valve is opened, ensuring that airflow pressure is always maintained in the circumferential direction between the sealing valve stem 12 and the fluid channel 111. This further ensures that the sealing valve stem 12 and the fluid channel 111 are coaxial. When the sealing valve stem 12 is inserted into the fluid channel 111 again to seal the fluid channel 111, collision between the sealing valve stem 12 and the inner wall of the fluid channel 111 or abnormal vibration that affects the gap sealing effect is prevented to a greater extent.

[0138] It should be noted that the outer contour dimensions of only the inlet end 121 of the sealing valve stem 12 may be smaller than the outer contour dimensions of the rest of the sealing valve stem 12. Alternatively, the above-mentioned effect can also be achieved by only making the dimensions of the left end of the fluid channel 111 larger than the dimensions of the rest of the fluid channel 111.

[0139] Continue to refer to Figure 3 As shown, in a specific implementation, the entry end 121 of the sealing valve stem 12 can be set to a tapered structure, so that the outer contour size of the entry end 121 of the sealing valve stem 12 is smaller than the outer contour size of the rest of the sealing valve stem 12. Figure 3 That is, the right end of the sealing valve stem 12 gradually decreases in size as it enters the fluid passage 111. Furthermore, the left end of the fluid passage 111 can be configured as a trumpet-shaped flared end. This configuration facilitates the manufacture of both the sealing valve stem 12 and the sealing valve body 11.

[0140] Since the conical structure is arranged at the entrance end 121 of the sealing valve stem 12 and the trumpet-shaped flared end is the left end of the fluid channel 111, when the sealing valve stem 12 seals the fluid channel 111, the existence of the conical structure and the trumpet-shaped flared end structure will not affect the sealing effect.

[0141] Of course, in other implementations, the outer wall of the entrance end of the sealing valve stem 12 may be sunken toward the central axis of the sealing valve stem 12 to form a step, so that the outer contour of the entrance end 121 of the sealing valve stem 12 is smaller than the outer contour of the rest of the sealing valve stem 12. Similarly, the inner wall of the left end of the fluid channel 111 may be bent and expanded in a direction away from the inner cavity of the fluid channel 111 to form a step, so that the size of the left end of the fluid channel 111 is larger than the size of the rest of the fluid channel 111.

[0142] Reference Figure 4 and Figure 5As shown, in other embodiments, a first fluid groove 122 can be provided on the outer side wall of the inlet end 121 of the sealing valve stem 12, and the first fluid groove 122 extends along the axial direction of the sealing valve stem 12. At the same time, a second fluid groove 112 is provided on the inner wall of one end of the fluid channel 111, and the second fluid groove 112 extends along the axial direction of the fluid channel 111, so as to achieve communication between the first chamber 21 and the second chamber 22 when the sealing valve stem 12 is not completely separated from the sealing valve body 11. One end of the fluid channel 111 here refers to the end of the fluid channel 111 close to the inlet end 121 of the sealing valve stem 12 when the fluid channel 111 is in an open state. Figure 4 This arrangement allows the sealing valve stem 12 to be opened without being completely removed from the fluid channel 111 in order to achieve fluid conduction, thereby always maintaining fluid pressure in the circumferential direction between the sealing valve stem 12 and the fluid channel 111, further ensuring that the sealing valve stem 12 and the fluid channel 111 are coaxial. When the sealing valve stem 12 is inserted into the fluid channel 111 for the next time to seal the fluid channel 111, collision between the sealing valve stem 12 and the inner wall of the fluid channel 111 or abnormal vibration that affects the gap sealing effect is prevented to a greater extent, thereby further improving the operational stability.

[0143] It should be noted that the first fluid groove 122 can be opened only on the outer wall of the entry end 121 of the sealing valve stem 12, or the second fluid groove 112 can be set only on the inner wall of the fluid channel 111. Both of these can enable fluid conduction when the sealing valve stem 12 is not completely separated from the sealing valve body 11, thereby further improving the stability of operation.

[0144] In addition, it should be noted that the fluid here can be gas or liquid.

[0145] Since the first fluid groove 122 is arranged at the entrance end 121 of the sealing valve stem 12 and the second fluid groove 112 is arranged at the left end of the fluid channel 111, when the sealing valve stem 12 seals the fluid channel 111, the existence of the first fluid groove 122 and the second fluid groove 112 will not affect the sealing effect.

[0146] The depth of the first fluid groove 122 and the second fluid groove 112 only needs to be sufficient for ventilation to open the fluid channel 111 so that the first chamber 21 and the second chamber 22 are connected.

[0147] In specific implementation, the first fluid groove 122 can be set to multiple, and the multiple in this embodiment refers to two or more. The multiple first fluid grooves 122 are evenly distributed along the circumference of the entrance end 121 of the sealing valve stem 12, thereby further improving the stability of the fluid distribution between the sealing valve stem 12 and the fluid channel 111, and avoiding abnormal shaking of the sealing valve stem 12 and collision with the inner wall of the fluid channel 111. Preferably, the first fluid grooves 122 can be set to more than three. Similarly, the second fluid grooves 112 can be set to multiple, and the multiple second fluid grooves 112 are evenly distributed along the circumference of one end of the fluid channel 111, which can also achieve the above-mentioned technical effects. Preferably, the second fluid grooves 112 can be set to more than three.

[0148] Preferably, the notch edge of the first fluid groove 122 is chamfered. That is, the connection between the notch edge of the first fluid groove 122 and the rest of the sealing valve stem 12 is smooth. The notch edge of the second fluid groove 112 is also chamfered. That is, the connection between the notch edge of the second fluid groove 112 and the rest of the inner wall of the fluid channel 111 is smooth. This arrangement ensures smoother fluid flow and avoids the generation of eddies and turbulence that could cause abnormal vibration.

[0149] Reference Figure 6A As shown, in some embodiments, a first fluid channel 113 may be provided at one end of the sealing valve body 11. The first fluid channel 113 is in communication with the fluid channel 111 to achieve communication between the first chamber 21 and the second chamber 22 when the sealing valve stem 12 is not completely separated from the sealing valve body 11. The one end of the sealing valve body 11 mentioned here refers to the end of the sealing valve body 11 close to the entry end 121 of the sealing valve stem 12 when the fluid channel 111 is in an open state. The entry end 121 of the sealing valve stem 12 is Figure 6A The right end of the sealing valve stem 12. Taking the support structure 13 as a leaf spring as an example, the first fluid channel 113 is located at one end of the sealing valve body 11 close to the leaf spring, that is, Figure 6A The left end of the middle sealing valve body 11.

[0150] This arrangement ensures that when the one-way valve is opened, the sealing valve stem 12 does not need to be completely removed from the fluid channel 111 to achieve fluid conduction, that is, the sealing valve stem 12 only needs to be moved to the position of the first fluid channel 113 so that at least part of the right end of the first fluid channel 113 is exposed, thereby further ensuring that the sealing valve stem 12 is coaxial with the fluid channel 111. When the sealing valve stem 12 is inserted into the fluid channel 111 for the next time to seal the fluid channel 111, it prevents the sealing valve stem 12 from colliding with the inner wall of the fluid channel 111 or affecting the gap sealing effect due to abnormal vibration to a greater extent, thereby further improving the stability of operation.

[0151] It should be noted that the fluid here can be gas or liquid.

[0152] Specifically, the first fluid channel 113 can be set as an inclined first fluid channel. That is, in the direction of moving along the sealing valve stem 12 to open the fluid channel 111, the first fluid channel 113 extends obliquely from the inner wall of the fluid channel 111 toward a direction away from the fluid channel 111. Figure 6A For example, in the direction from right to left, the first fluid channel 113 extends obliquely from the inner wall of the fluid channel 111 toward a direction away from the fluid channel 111 and penetrates the sealing valve body 11 .

[0153] The inclination angle of the first fluid channel 113 can be set according to actual needs, and is not particularly limited in this embodiment.

[0154] Of course, the first fluid channel 113 may also be an L-shaped first fluid channel, one end of which is connected to the fluid channel 111 and the other end of which is exposed on the left side of the sealing valve body 11 .

[0155] In one specific implementation, a plurality of first fluid channels 113 can be provided, and the plurality of first fluid channels 113 are arranged at intervals along the circumference of the sealing valve body 11, that is, the plurality of first fluid channels 113 are arranged at intervals around the circumference of the fluid channel 111. Preferably, the plurality of first fluid channels 113 can be evenly distributed along the circumference of the sealing valve body 11, thereby improving the overall stability of the one-way valve. The cross-sectional shape of the first fluid channels 113 can be circular, elliptical, sector-shaped, etc., but this embodiment is not limited thereto.

[0156] In another specific implementation, the first fluid channel 113 may also be a tapered channel arranged along the circumference of the sealing valve body 11, and a connecting support member for supporting the tapered channel is provided in the housing 20. It is understandable that, since the tapered channel in this case is a channel arranged along the circumference of the sealing valve body 11, a connecting support member is required to support the tapered channel. Figure 6A As shown, it is necessary to connect the support Figure 6A The lower left area of the upper half of the middle sealing valve body 11 and the upper left area of the lower half of the sealing valve body 11 are supported.

[0157] Specifically, the connecting support can be arranged in the conical channel, for example, the connecting support is a connecting rib, and the two ends of the connecting rib are respectively connected to the opposite sides of the inner wall of the conical channel. Of course, the connecting support can also be other shapes, as long as it can support the conical channel and will not affect the normal passage of the fluid in the first fluid channel 113.

[0158] Alternatively, the connecting support member may be provided on the outside of the sealing valve body 11. For example, the connecting support member may be a connecting rib provided on the outside of the sealing valve body 11, with one end of the connecting rib connected to the inner wall of the housing 20 and the other end of the connecting rib connected to the portion of the sealing valve body 11 that needs to be supported. The connecting rib will not interfere with the sealing valve stem 12, the support structure 13, the fluid channel 111, or other components. Of course, the connecting support member may also have other shapes, as long as it can effectively connect and support the required support portion of the sealing valve body 11 and does not interfere with the sealing valve stem 12, the support structure 13, and the fluid channel 111.

[0159] Reference Figure 6B As shown, in other embodiments, a second fluid channel 123 may be provided on the sealing valve stem 12, and a fluid inlet 1231 of the second fluid channel 123 is located at the entry end 121 of the sealing valve stem 12 and communicates with the fluid passage 111, so as to achieve communication between the first chamber 21 and the second chamber 22 when the sealing valve stem 12 is not completely separated from the sealing valve body 11. Figure 6B The right end of the middle sealing valve stem 12. It can be understood that the fluid outlet 1232 of the second fluid channel 123 is located on the left side of the fluid inlet 1231.

[0160] This arrangement ensures that when the one-way valve is opened, the sealing valve stem 12 does not need to be completely removed from the fluid channel 111 to achieve fluid conduction, that is, the sealing valve stem 12 only needs to be moved to the fluid outlet 1232 of the second fluid channel 123 and removed from the fluid channel 111, thereby further ensuring that the sealing valve stem 12 and the fluid channel 111 are coaxial. When the sealing valve stem 12 is inserted into the fluid channel 111 for the next time to seal the fluid channel 111, it prevents the sealing valve stem 12 from colliding with the inner wall of the fluid channel 111 or affecting the gap sealing effect due to abnormal vibration to a greater extent, thereby further improving the stability of operation.

[0161] It should be noted that the fluid here can be gas or liquid.

[0162] Specifically, the second fluid channel 123 can have multiple fluid outlets 1232, with the multiple fluid outlets 1232 spaced apart along the circumference of the sealing valve stem 12. This arrangement improves the overall stability of the one-way valve structure. In this case, the second fluid channel 123 can have multiple fluid inlets 1231, with each fluid inlet 1231 corresponding to one fluid outlet 1232. That is, there are multiple second fluid channels 123, and the second fluid channels 123 are not connected to each other. Alternatively, the second fluid channel 123 can have a single fluid inlet 1231, which is connected to each of the multiple fluid outlets 1232.

[0163] Alternatively, the fluid outlet 1232 of the second fluid channel 123 can be directly configured as an annular fluid outlet arranged circumferentially along the sealing valve stem 12 to improve the overall stability of the one-way valve structure. In this case, a single fluid inlet 1231 can be provided, which is connected to the annular fluid outlet.

[0164] It is understood that when the one-way valve is in a closed state, the fluid inlet 1231 and the fluid outlet 1232 are both located in the fluid channel 111. Figure 6A or Figure 6B For example, when the one-way valve transitions from a closed state to an open state, that is, when the one-way valve moves to the left, at least a portion of the fluid outlet 1232 moves out of the fluid channel 111. The fluid in the fluid channel 111 enters through the fluid inlet 1231 of the second fluid channel 123 and is discharged from the fluid outlet 1232 through the second fluid channel 123, thereby opening the one-way valve. At this time, the end where the fluid inlet 1231 is located has not moved out of the fluid channel 111. Therefore, the above arrangement allows fluid conduction to be achieved without the sealing valve stem 12 being completely removed from the fluid channel 111 when the one-way valve is opened. That is, the sealing valve stem 12 only needs to be moved to the point where the fluid outlet 1232 of the second fluid channel 123 is removed from the fluid channel 111, further improving operational stability.

[0165] Example 2

[0166] 1a to Figure 10 As shown, this embodiment provides a linear compressor 2 , including: a housing 20 , and a one-way valve structure 1 , a cylinder 23 , a piston 24 , and a motor 25 arranged in the housing 20 .

[0167] Among them, one one-way valve structure 1 can be set in the shell 20, and two or more one-way valve structures 1 can also be set, and the specific setting can be made according to actual needs.

[0168] The one-way valve structure 1 in this embodiment has the same specific structure as the one-way valve structure 1 provided in the above embodiment, and can bring the same or similar technical effects. They will not be described one by one here, and the details can be referred to the description of embodiment 1.

[0169] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0170] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A one-way valve structure, arranged in a housing (20), wherein the housing (20) has a first chamber (21) and a second chamber (22), characterized in that: The one-way valve structure comprises a sealing valve body (11), a sealing valve stem (12) and a supporting structure (13); The sealing valve body (11) is arranged between the first chamber (21) and the second chamber (22), and the sealing valve body (11) has a fluid channel (111) capable of communicating with the first chamber (21) and the second chamber (22); the sealing valve stem (12) can extend into the fluid channel (111) under the action of the pressure difference between the first chamber (21) and the second chamber (22) to seal the fluid channel (111), or move in a direction away from the fluid channel (111) to open the fluid channel (111); The support structure (13) is used to radially support the sealing valve stem (12), and the support structure (13) has elasticity along the axial direction of the sealing valve stem (12), so that when the sealing valve stem (12) seals the fluid channel (111), a gap seal is formed between the sealing valve stem (12) and the fluid channel (111); A first fluid groove (122) is provided on the outer side wall of the inlet end (121) of the sealing valve stem (12), and the first fluid groove (122) extends along the axial direction of the sealing valve stem (12) to achieve communication between the first chamber (21) and the second chamber (22) when the sealing valve stem (12) is not completely separated from the sealing valve body (11); A second fluid groove (112) is provided on the inner wall of one end of the fluid channel (111), and the second fluid groove (112) extends along the axial direction of the fluid channel (111) to achieve communication between the first chamber (21) and the second chamber (22) when the sealing valve stem (12) is not completely separated from the sealing valve body (11); wherein, one end of the fluid channel (111) is an end of the fluid channel (111) close to the entrance end (121) of the sealing valve stem (12) when the fluid channel (111) is in an open state; The first fluid groove (122) and the second fluid groove (112) are arranged opposite to each other; The notch edge of the first fluid groove (122) is rounded; The notch edge of the second fluid groove (112) is rounded.

2. The one-way valve structure according to claim 1, characterized in that: The support structure (13) includes a leaf spring assembly; The leaf spring assembly is arranged on one side of the sealing valve body (11); the leaf spring assembly includes a leaf spring, the leaf spring is provided with a through hole (131) coaxial with the fluid channel (111), the sealing valve stem (12) is passed through the through hole (131) and is fixed relative to the hole wall of the through hole (131).

3. The one-way valve structure according to claim 2, characterized in that: A step surface (124) is provided on the outer side wall of the sealing valve stem (12), and the step surface (124) is blocked on one side of the leaf spring assembly. A first fastener (126) is provided on the other side of the leaf spring assembly, and the first fastener (126) is sleeved on the sealing valve stem (12) to connect the sealing valve stem (12) to the leaf spring assembly.

4. The one-way valve structure according to claim 2, characterized in that: The sealing valve stem (12) has a fixing portion (125), and the fixing portion (125) is located on a side of the leaf spring assembly away from the sealing valve body (11). The leaf spring assembly is provided with a mounting hole (136), and the leaf spring assembly is connected to the fixing portion (125) via a second fastener (127) inserted into the mounting hole (136).

5. The one-way valve structure according to claim 2, characterized in that: The leaf spring is a scroll arm leaf spring.

6. The one-way valve structure according to claim 2, characterized in that: There are at least two leaf springs, and the sealing valve stem (12) is supported in the housing (20) by at least two leaf springs; At least two of the leaf springs are concentric and stacked along the axial direction of the sealing valve stem (12), and the sealing valve stem (12) is inserted into each of the through holes (131) on the at least two leaf springs.

7. The one-way valve structure according to claim 1, characterized in that: The support structure (13) includes a radial support structure and an elastic member (135); The radial support structure is used to radially support the sealing valve stem (12), so that when the sealing valve stem (12) seals the fluid channel (111), a gap seal is formed between the sealing valve stem (12) and the fluid channel (111); The elastic member (135) is located on one side of the sealing valve body (11), the deformation direction of the elastic member (135) is consistent with the axial direction of the fluid channel (111), one end of the elastic member (135) is relatively fixed to the housing (20), and the sealing valve stem (12) is connected to the other end of the elastic member (135).

8. The one-way valve structure according to claim 7, characterized in that: The radial support structure includes a rigid support member (134); The rigid support member (134) is provided on one side of the sealing valve body (11); the rigid support member (134) is fixed relative to the housing (20); a support hole (1341) coaxial with the fluid channel (111) is provided on the rigid support member (134); the sealing valve stem (12) is passed through the support hole (1341) and is movable along the axial direction of the support hole (1341); The elastic member (135) is located on a side of the rigid support member (134) away from the sealing valve body (11).

9. The one-way valve structure according to claim 8, characterized in that: A linear bearing is provided in the support hole (1341); The outer cylinder of the linear bearing is relatively fixed to the wall of the support hole (1341), and the sealing valve stem (12) is inserted into the inner cylinder of the linear bearing and relatively fixed to the wall of the inner cylinder.

10. The one-way valve structure according to claim 7, characterized in that: The radial support structure comprises a first air supply channel (137) provided on the sealing valve stem (12); the first air supply channel (137) has a first air inlet (1371) for supporting gas to enter and a first air outlet (1372) for supporting gas to be discharged; the first air outlet (1372) is communicated with the fluid channel (111), and the first air outlet (1372) is arranged toward the inner wall of the fluid channel (111); the first air supply channel (137) is used to circumferentially deliver supporting gas to the inner wall of the fluid channel (111), so that the supporting gas radially supports the sealing valve stem (12); and / or, The radial support structure includes a second air supply channel (138) provided on the sealing valve body (11); the second air supply channel (138) has a second air inlet (1381) for the support gas to enter and a second air outlet (1382) for the support gas to be discharged; the second air outlet (1382) is provided on the inner wall of the fluid channel (111), and the second air outlet (1382) is provided toward the sealing valve stem (12); the second air supply channel (138) is used for delivering the support gas to the circumference of the sealing valve stem (12), so that the support gas radially supports the sealing valve stem (12).

11. The one-way valve structure according to claim 10, characterized in that: There are a plurality of first exhaust ports (1372), and all of the first exhaust ports (1372) are arranged at intervals along the circumference of the sealing valve stem (12); Alternatively, there are multiple first exhaust ports (1372), and among all the first exhaust ports (1372), some of the first exhaust ports (1372) are arranged at intervals along the circumference of the sealing valve stem (12), and some of the first exhaust ports (1372) are arranged at intervals along the axial direction of the sealing valve stem (12).

12. The one-way valve structure according to claim 10, characterized in that: The first exhaust port (1372) is an annular exhaust port extending along the circumference of the sealing valve stem (12).

13. The one-way valve structure according to claim 12, characterized in that: There are a plurality of first exhaust ports (1372), and the plurality of first exhaust ports (1372) are arranged at intervals along the axial direction of the sealing valve stem (12).

14. The one-way valve structure according to claim 10, characterized in that: There are a plurality of second exhaust ports (1382), and all of the second exhaust ports (1382) are arranged at intervals along the inner wall of the fluid channel (111) in the circumferential direction; Alternatively, there are a plurality of second exhaust ports (1382), and among all the second exhaust ports (1382), some of the second exhaust ports (1382) are arranged at intervals along the circumferential direction of the inner wall of the fluid channel (111), and some of the second exhaust ports (1382) are arranged at intervals along the axial direction of the fluid channel (111).

15. The one-way valve structure according to claim 10, characterized in that: The second exhaust port (1382) is an annular exhaust port extending along the circumference of the fluid channel (111).

16. The one-way valve structure according to claim 15, characterized in that: There are a plurality of second exhaust ports (1382), and the plurality of second exhaust ports (1382) are arranged at intervals along the axial direction of the fluid channel (111).

17. The one-way valve structure according to claim 10, characterized in that: The radial support structure further includes a rigid support member (134); The rigid support member (134) is provided on one side of the sealing valve body (11); the rigid support member (134) is fixed relative to the housing (20); a support hole (1341) coaxial with the fluid channel (111) is provided on the rigid support member (134); the sealing valve stem (12) is passed through the support hole (1341) and is movable along the axial direction of the support hole (1341); The elastic member (135) is located on a side of the rigid support member (134) away from the sealing valve body (11).

18. The one-way valve structure according to claim 1, characterized in that: When the sealing valve stem (12) seals the fluid channel (111), the gap between the sealing valve stem (12) and the inner wall of the fluid channel (111) is no greater than 20 μm.

19. The one-way valve structure according to any one of claims 1 to 18, characterized in that: The outer contour size of the entry end (121) of the sealing valve stem (12) is smaller than the outer contour size of the remaining portion of the sealing valve stem (12); And / or, the size of one end of the fluid channel (111) is larger than the size of the rest of the fluid channel (111), wherein the one end of the fluid channel (111) is the end of the fluid channel (111) close to the entrance end (121) of the sealing valve stem (12) when the fluid channel (111) is in an open state.

20. The one-way valve structure according to claim 19, characterized in that: The entry end (121) of the sealing valve stem (12) is formed into a conical structure; And / or, one end of the fluid channel (111) is formed as a trumpet-shaped expanded end.

21. The one-way valve structure according to any one of claims 1 to 18, characterized in that: A first fluid groove (122) is provided on the outer side wall of the inlet end (121) of the sealing valve stem (12), and the first fluid groove (122) extends along the axial direction of the sealing valve stem (12) to achieve communication between the first chamber (21) and the second chamber (22) when the sealing valve stem (12) is not completely separated from the sealing valve body (11); And / or, a second fluid groove (112) is provided on the inner wall of one end of the fluid channel (111), and the second fluid groove (112) extends along the axial direction of the fluid channel (111) to achieve conduction between the first chamber (21) and the second chamber (22) when the sealing valve stem (12) is not completely separated from the sealing valve body (11); wherein, one end of the fluid channel (111) is an end of the fluid channel (111) close to the entrance end (121) of the sealing valve stem (12) when the fluid channel (111) is in an open state.

22. The one-way valve structure according to claim 21, characterized in that: There are a plurality of first fluid grooves (122), and the plurality of first fluid grooves (122) are evenly distributed along the circumference of the entry end (121); There are a plurality of second fluid grooves (112), and the plurality of second fluid grooves (112) are evenly distributed along the circumference of one end of the fluid channel (111).

23. The one-way valve structure according to claim 21, characterized in that: The notch edge of the first fluid groove (122) is rounded; The notch edge of the second fluid groove (112) is rounded.

24. The one-way valve structure according to any one of claims 1 to 18, characterized in that: A first fluid channel (113) is provided at one end of the sealing valve body (11), and the first fluid channel (113) is connected to the fluid channel (111) to achieve conduction between the first chamber (21) and the second chamber (22) when the sealing valve stem (12) is not completely separated from the sealing valve body (11); wherein, one end of the sealing valve body (11) is an end of the sealing valve body (11) close to the entry end (121) of the sealing valve stem (12) when the fluid channel (111) is in an open state.

25. The one-way valve structure according to claim 24, characterized in that: In a direction of movement along the sealing valve stem (12) to open the fluid channel (111), the first fluid channel (113) extends obliquely from the inner wall of the fluid channel (111) toward a direction away from the fluid channel (111).

26. The one-way valve structure according to claim 24, characterized in that: There are a plurality of first fluid channels (113), and the plurality of first fluid channels (113) are arranged at intervals along the circumference of the sealing valve body (11); Alternatively, the first fluid channel (113) is a tapered channel arranged along the circumference of the sealing valve body (11), and a connecting support for supporting the tapered channel is provided in the housing (20).

27. The one-way valve structure according to any one of claims 1 to 18, characterized in that: A second fluid channel (123) is provided on the sealing valve stem (12), and a fluid inlet (1231) of the second fluid channel (123) is located at the entry end (121) of the sealing valve stem (12) and is connected to the fluid channel (111) to achieve conduction between the first chamber (21) and the second chamber (22) when the sealing valve stem (12) is not completely separated from the sealing valve body (11).

28. The one-way valve structure according to claim 27, characterized in that: The second fluid channel (123) has a plurality of fluid outlets (1232), and the plurality of fluid outlets (1232) are arranged at intervals along the circumference of the sealing valve stem (12); Alternatively, the fluid outlet (1232) of the second fluid channel (123) is an annular fluid outlet arranged along the circumference of the sealing valve stem (12).

29. A linear compressor, characterized in that: The invention comprises the one-way valve structure according to any one of claims 1 to 28 and the housing (20).

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