One-way valve and refrigeration equipment

Abstract

The invention discloses a one-way valve and refrigeration equipment, and the one-way valve comprises a fixed plug, a piston head, a piston shaft and an elastic piece; the fixing plug is provided with a mounting hole and a medium through hole in a penetrating manner, one end of the fixing plug is sunken to form a movable groove, the movable groove is communicated with the medium through hole, and a first sealing structure is arranged on the peripheral surface of the fixing plug; the piston head is movably installed in the movable groove, and a second sealing structure is arranged between the piston head and the movable groove. One end of the piston shaft is connected to the piston head, the piston shaft movably penetrates through the mounting hole, and the other end of the piston shaft is riveted with a limiting plate; one end of the elastic piece abuts against the fixing plug, and the other end of the elastic piece abuts against the limiting plate. According to the technical scheme, the assembly process of the limiting plate and the piston shaft in the one-way valve is simplified, and the production cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration equipment, and in particular to a one-way valve and refrigeration equipment. Background Art

[0002] The one-way valve is a critical component in the air-conditioning system, and plays a vital role in the safe operation and durability of the air-conditioning system. It can be used to control the flow direction of the refrigerant, preventing the refrigerant from flowing in the opposite direction and damaging the heat exchanger pipe. In the related art, the limit plate used for clamping the spring on the piston-type one-way valve is firstly interference-fitted with the piston shaft, and then the limit plate is fixed to the end of the piston shaft by laser welding. The assembly process of the limit plate is complicated and difficult, and the production cost is high. Summary of the invention

[0003] The main purpose of the present invention is to provide a one-way valve, aiming to simplify the assembly process of a limit plate and a piston shaft in the one-way valve to save production costs.

[0004] To achieve the above object, the one-way valve proposed by the present invention comprises:

[0005] A fixed plug is provided with a mounting hole and a medium through hole, one end of the fixed plug is recessed to form a movable groove, the movable groove is communicated with the medium through hole, and a first sealing structure is provided on the outer peripheral surface of the fixed plug;

[0006] A piston head is movably mounted in the movable groove, and a second sealing structure is provided between the piston head and the movable groove;

[0007] A piston shaft, one end of which is connected to the piston head, the piston shaft is movably inserted into the mounting hole, and the other end of the piston shaft is riveted to a limit plate; and

[0008] An elastic member is sleeved on the piston shaft, one end of the elastic member abuts against the fixing plug, and the other end abuts against the limiting plate.

[0009] Optionally, the outer wall of the piston shaft is recessed with an installation groove, the limit plate is sleeved in the installation groove, and the one-way valve also includes a clamping pin, which is inserted into the piston shaft to press the limit plate against the piston shaft.

[0010] Optionally, an edge of the limiting plate is bent toward the fixing plug to form a limiting portion, and one end of the elastic member is located in the limiting portion.

[0011] Optionally, the piston head is provided with a fixing hole, the outer peripheral wall of the piston shaft is provided with a mounting convex ring, the mounting convex ring is located at an end away from the limiting plate, the fixing hole is adapted to the shape of the piston shaft, and the piston shaft is rotatably inserted into the fixing hole.

[0012] Optionally, the piston shaft and the piston head are integrally injection molded.

[0013] Optionally, a first annular groove is provided on the outer circumferential surface of the fixed plug, the first sealing structure is provided in the first annular groove, a second annular groove is provided on the outer circumferential surface of the piston head, the second sealing structure is provided in the second annular groove, and the second sealing structure is used to abut against the groove wall of the movable groove.

[0014] Optionally, the movable groove is an annular groove, and the notch of the movable groove gradually expands in the direction away from the limiting plate, and the shape of the piston head is adapted to the shape of the movable groove.

[0015] Optionally, the elastic member is a spring, and the spring sleeved on the piston shaft is in a compressed state, so that the limit plate tends to move away from the piston head.

[0016] Optionally, the piston head is made of PPS plastic or PTFE plastic.

[0017] The present invention also provides a refrigeration device, comprising the one-way valve as described above.

[0018] In the technical solution of the present invention, the piston shaft is passed through the mounting hole of the fixed plug, and the piston shaft can move along the axial direction of the mounting hole. One end of the piston shaft is connected to the piston head, and the other end of the piston shaft is riveted to a limit plate. When the one-way valve is arranged in the pipeline, when the first sealing structure on the peripheral wall of the fixed plug abuts against the inner wall of the pipeline, in the natural state of the elastic member, the elastic force of the elastic member pushes the limit plate away from the fixed plug, so that the piston shaft drives the piston head to move toward the bottom of the movable groove. At this time, the gap between the groove side wall of the movable groove and the piston head is sealed by the second sealing structure to prevent the medium outside the one-way valve from entering the medium through hole, and the medium located on one side of the limit plate can pass through the medium through hole and push the piston head away from the movable groove, so that a gap is generated between the movable groove and the piston head for the medium to flow out. The riveted connection strength is reliable, the operation is simple, and the use cost is low. Such a setting can reduce the operation of welding the limit plate and the piston shaft, save production costs, and thus simplify the assembly process of the limit plate and the piston shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A cross-sectional view of an embodiment of a one-way valve of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 This is an exploded view of the one-way valve of the present invention in which the limit plate is not riveted to the piston shaft;

[0023] Figure 4 It is a top view of the fixed plug of the one-way valve of the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 10 Fixed plug 101 Mounting holes 102 Activity slot 103 First annular groove 104 The first sealing structure 105 Dielectric through hole 11 Piston head 111 Fixing holes 112 Second annular groove 113 Second sealing structure 12 Piston shaft 121 Mounting slot 122 Mounting collar 13 Limit plate 14 Elastic parts 15 Pressing nail

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The invention provides a one-way valve.

[0032] In one embodiment of the present invention, Figures 1 to 4 As shown, the one-way valve includes a fixed plug 10, a piston head 11, a piston shaft 12 and an elastic member 14; the fixed plug 10 is penetrated with a mounting hole 101 and a medium through hole 105, one end of the fixed plug 10 is recessed to form a movable groove 102, the movable groove 102 is communicated with the medium through hole 105, and the outer peripheral surface of the fixed plug 10 is provided with a first sealing structure; the piston head 11 can be movably installed in the movable groove 102, and a second sealing structure is provided between the piston head 11 and the movable groove 102; one end of the piston shaft 12 is connected to the piston head 11, the piston shaft 12 is movably penetrated in the mounting hole 101, and the other end of the piston shaft 12 is riveted to a limiting plate 13; the elastic member 14 is sleeved on the piston shaft 12, one end of the elastic member 14 abuts against the fixed plug 10, and the other end abuts against the limiting plate 13.

[0033] In the related art, the limit plate used for clamping the spring on the piston-type one-way valve is firstly interference fit with the piston shaft, and then the limit plate is fixed to the end of the piston shaft by laser welding. This assembly process of the limit plate is complicated and difficult, and the production cost required is high.

[0034] In the technical solution of the present invention, the piston shaft 12 is inserted into the mounting hole 101 of the fixed plug 10, and the piston shaft 12 can move along the axial direction of the mounting hole 101. One end of the piston shaft 12 is connected to the piston head 11, and the other end of the piston shaft 12 is riveted to the limit plate 13. When the one-way valve is arranged in the pipeline, when the first sealing structure on the peripheral wall of the fixed plug 10 abuts against the inner wall of the pipeline, in the natural state of the elastic member 14, the elastic force of the elastic member 14 pushes the limit plate 13 away from the fixed plug 10, so that the piston shaft 12 drives the piston head 11 to move toward the bottom of the movable groove 102. At this time, through the second sealing structure The sealing structure seals the gap between the side wall of the movable groove 102 and the piston head 11 to prevent the medium outside the one-way valve from entering the medium through hole 105. The medium located on the side of the limit plate 13 can pass through the medium through hole 105 to push the piston head 11 away from the movable groove 102, so that a gap is generated between the movable groove 102 and the piston head 11 for the medium to flow out. The riveted connection has reliable connection strength, simple operation, and low cost of use. This arrangement can reduce the operation of welding the limit plate 13 and the piston shaft 12, save production costs, and thus simplify the assembly process of the limit plate 13 and the piston shaft 12.

[0035] In this embodiment, the medium through hole 105 can pass liquid and gas, such as air and refrigerant.

[0036] In one embodiment, the outer wall of the piston shaft 12 is recessed with an installation groove 121, and the limit plate 13 is sleeved in the installation groove 121. The one-way valve also includes a clamping pin 15, which is inserted into the piston shaft 12 to clamp the limit plate 13 to the piston shaft 12.

[0037] Specifically, a mounting groove 121 is provided on the peripheral wall of the piston shaft 12, and the limiting plate 13 is a circular plate. The limiting plate 13 is sleeved on the piston shaft 12, and one side of the limiting plate 13 abuts against the groove side wall of the mounting groove 121. The piston shaft 12 partially exceeds the end face of the limiting plate 13, and the clamping pin 15 is pressed into the end face of the piston shaft 12. The pressure of the clamping pin 15 will cause the end of the piston shaft 12 to deform, and the deformed part of the piston shaft 12 can be pressed against the end face of the limiting plate 13 to fix the limiting plate 13 to the piston shaft 12. This arrangement simplifies the structure and assembly process, and can ensure the installation stability of the limiting plate 13. In some other embodiments, the limiting plate 13 abuts against the end of the piston shaft 12, and the limiting plate 13 is provided with a rivet hole for rivet insertion, and the limiting plate 13 is riveted to the piston shaft 12 by rivets.

[0038] In one embodiment, the edge of the limiting plate 13 is bent toward the fixing plug 10 to form a limiting portion, and one end of the elastic member 14 is located in the limiting portion.

[0039] Specifically, the elastic member 14 is a spring, which is sleeved on the piston shaft 12. During the compression and extension of the spring, the limiter can prevent the spring from being deflected, so that the use effect of the spring can be guaranteed. In some other embodiments, the limiter plate 13 is provided with a limiter boss, which is used to abut the inner side of the spring.

[0040] In one embodiment, the piston head 11 is provided with a fixing hole 111, and the outer peripheral wall of the piston shaft 12 is provided with a mounting convex ring 122, the mounting convex ring 122 is located at the end away from the limiting plate 13, the fixing hole 111 is adapted to the shape of the piston shaft 12, and the piston shaft 12 can be rotatably inserted into the fixing hole 111.

[0041] Specifically, the piston head 11 has a certain degree of deformability, and a fixing hole 111 adapted to the shape of the end of the piston shaft 12 is provided on the piston head 11. One end of the piston shaft 12 is embedded in the fixing hole 111 to connect the piston shaft 12 to the piston head 11. The assembly clearance between the piston shaft 12 and the piston head 11 is 0.02mm-0.10mm. Such a setting can ensure the connection stability between the piston shaft 12 and the piston head 11. When the piston shaft 12 moves, the fixing hole 111 can limit the movement of the mounting convex ring 122, thereby ensuring that the piston shaft 12 will not easily detach from the piston head 11. In some other embodiments, the piston head 11 has a bolt through hole for bolts to pass through, and a threaded hole is provided at the end of the piston shaft 12. The bolt passes through the bolt through hole and is screwed to the threaded hole to fix the piston head 11 to the piston shaft 12.

[0042] In one embodiment, the piston shaft 12 and the piston head 11 are integrally injection molded.

[0043] Specifically, the piston shaft 12 and the piston head 11 are formed by an integral injection molding process. In this way, there is no gap between the piston shaft 12 and the piston head 11, ensuring the connection stability between the two. At the same time, the integral molding can make the piston shaft 12 and the piston head 11 have better strength, and it is not easy to deform or damage during long-term use, thereby improving the service life, and the cost of integral injection molding is low. In some other embodiments, the piston shaft 12 and the piston head 11 are integrally cast.

[0044] In one embodiment, a first annular groove 103 is provided on the outer circumferential surface of the fixed plug 10, a first sealing structure 104 is provided in the first annular groove 103, a second annular groove 112 is provided on the outer circumferential surface of the piston head 11, a second sealing structure 113 is provided in the second annular groove 112, and the second sealing structure 113 is used to abut against the groove wall of the movable groove 102.

[0045] Specifically, the outer circumference of the fixed plug 10 is provided with a first annular groove 103, and the first sealing structure 104 and the second sealing structure 113 are both sealing rings. The first sealing structure 104 is sleeved in the first annular groove 103, and the first sealing structure 104 is slightly higher than the outer circumference of the fixed plug 10. The first sealing structure 104 is used to abut the inner wall of the pipeline, and the second sealing structure 113 is used to abut the groove side wall of the movable groove 102. The second sealing structure 113 is slightly higher than the outer circumference of the piston head 11 to seal the gap between the side wall of the movable groove 102 and the piston head 11. Such an arrangement can ensure the sealing effect. In some other embodiments, the second sealing structure includes a second annular groove 112 provided in the movable groove 102 and a second sealing structure 113 embedded in the second annular groove 112, and the second sealing structure 113 is used to abut the outer circumference of the piston head 11.

[0046] In one embodiment, the movable groove 102 is an annular groove, and the notch of the movable groove 102 gradually expands in a direction away from the limiting plate 13 , and the shape of the piston head 11 is adapted to the shape of the movable groove 102 .

[0047] Specifically, the groove side wall of the movable groove 102 has a guiding function, so that the piston head 11 has a tendency to move toward the groove bottom wall of the movable groove 102. When the piston head 11 abuts against the groove bottom wall of the movable groove 102, the medium through hole 105 can be completely closed to prevent the external medium from entering the interior. This arrangement can ensure the stability of the movement of the piston head 11, and it will not leave the movable groove 102 when moving. In some other embodiments, the movable groove 102 is a cylindrical groove, and a chamfer is provided at the groove edge of the groove.

[0048] In one embodiment, the elastic member 14 is a spring, and the spring sleeved on the piston shaft 12 is in a compressed state, so that the limiting plate 13 has a tendency to move away from the piston head 11 .

[0049] Specifically, the spring is in a compressed state when it is sleeved on the piston shaft 12, so the spring can provide the piston shaft 12 with a thrust away from the fixed plug 10, thereby ensuring that when the one-way valve does not pass the medium, the piston head 11 is pressed against the fixed plug 10 to close the medium through hole 105. When the medium is to flow into the medium through hole 105 from the other side of the fixed plug 10, the medium can push the piston head 11 outward, and the spring is further compressed at this time, and the piston head 11 is away from the movable groove 102, so that the medium can flow outward. This arrangement can ensure that the piston head 11 is continuously pressed against the fixed plug 10, ensuring the use effect of the one-way valve. In some other embodiments, the elastic member 14 is a leaf spring.

[0050] In one embodiment, the piston head 11 is made of PPS plastic or PTFE plastic.

[0051] Specifically, these two materials are high temperature resistant materials with low friction coefficient and good chemical stability. The surface of the piston head 11 made of one of these two materials will not retain impurities, and the piston head 11 can move smoothly in the movable groove 102, ensuring that the one-way valve can be switched more quickly and sensitively. This arrangement can improve the use effect of the one-way valve and the service life of the one-way valve, and can ensure good use effect after multiple switches. In some other embodiments, the material of the piston head 11 is stainless steel.

[0052] The present invention also proposes a refrigeration device, which includes a one-way valve. The specific structure of the one-way valve refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the one-way valve is installed at the exhaust port of the compressor of the refrigeration device to prevent the compressor from reversing when it is shut down, or to prevent the refrigerant from flowing from the running compressor to the non-running compressor.

[0053] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A one-way valve, used in refrigeration equipment, characterized in that: The one-way valve comprises: A fixed plug is provided with a mounting hole and a medium through hole, one end of the fixed plug is recessed to form a movable groove, the movable groove is communicated with the medium through hole, and a first sealing structure is provided on the outer peripheral surface of the fixed plug; A piston head is movably mounted in the movable groove, and a second sealing structure is provided between the piston head and the movable groove; A piston shaft, one end of which is connected to the piston head, the piston shaft is movably inserted into the mounting hole, and the other end of the piston shaft is riveted to a limit plate; and An elastic member is sleeved on the piston shaft, one end of the elastic member abuts against the fixing plug, and the other end abuts against the limiting plate.

2. The one-way valve according to claim 1, characterized in that: The outer peripheral wall of the piston shaft is concavely provided with an installation groove, the limit plate is sleeved in the installation groove, and the one-way valve also includes a clamping nail, which is inserted into the piston shaft to clamp the limit plate to the piston shaft.

3. The one-way valve according to claim 2, characterized in that: The edge of the limiting plate is bent toward the fixing plug to form a limiting portion, and one end of the elastic member is located in the limiting portion.

4. The one-way valve according to claim 1, characterized in that: The piston head is provided with a fixing hole, the outer peripheral wall of the piston shaft is provided with a mounting convex ring, the mounting convex ring is located at an end away from the limiting plate, the fixing hole is adapted to the shape of the piston shaft, and the piston shaft is rotatably inserted into the fixing hole.

5. The one-way valve according to claim 1, characterized in that: The piston shaft and the piston head are integrally injection molded.

6. The one-way valve according to claim 1, characterized in that: The outer circumference of the fixed plug is provided with a first annular groove, the first sealing structure is provided in the first annular groove, the outer circumference of the piston head is provided with a second annular groove, the second sealing structure is provided in the second annular groove, and the second sealing structure is used to abut the groove wall of the movable groove.

7. The one-way valve according to claim 1, characterized in that: The movable groove is an annular groove. In the direction away from the limiting plate, the notch of the movable groove gradually expands, and the shape of the piston head is adapted to the shape of the movable groove.

8. The one-way valve according to claim 1, characterized in that: The elastic member is a spring, and the spring sleeved on the piston shaft is in a compressed state, so that the limiting plate has a tendency to move away from the piston head.

9. The one-way valve according to claim 1, characterized in that: The piston head is made of PPS plastic or PTFE plastic.

10. A refrigeration device, characterized in that: Comprising a one-way valve as claimed in any one of claims 1 to 9.

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