CN211397826U - Pressure maintaining valve and refrigeration compressor - Google Patents
Pressure maintaining valve and refrigeration compressor Download PDFInfo
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- CN211397826U CN211397826U CN202020044721.3U CN202020044721U CN211397826U CN 211397826 U CN211397826 U CN 211397826U CN 202020044721 U CN202020044721 U CN 202020044721U CN 211397826 U CN211397826 U CN 211397826U
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Abstract
The utility model provides a pressure maintaining valve and a refrigeration compressor, which relate to the technical field of valves and compressors and solve the problems that the valve cover and the valve sleeve have more complex structures and the valve seat sealing ring is easy to damage due to the expansion of a refrigerant in the prior art; the valve cover connecting sleeve is detachably arranged at the air inlet of the low-pressure end of the valve body; the valve cover is detachably connected with the air inlet of the low-pressure end of the valve body and tightly fixes the valve cover connecting sleeve to the valve body; the valve core is arranged on the valve seat of the valve body and is movably matched with the inner wall of the valve cover connecting sleeve; the first elastic piece is arranged between the valve cover and the valve core and used for providing opening pressure and resetting force for the valve core. The refrigeration compressor includes a compressor and the pressure maintenance valve. The utility model has the characteristics of simple structure, processing convenience, maintenance cost are low.
Description
Technical Field
The utility model relates to a valve technology and compressor technical field, specific pressure maintenance valve and compressor that says so.
Background
The pressure maintaining valve is used in systems such as an air-cooled heat pump, a refrigerating unit and a low-temperature brine unit which often need cold starting due to weather and the like, and the pressure maintaining valve is used in the units to quickly establish enough high-low pressure difference on the high-low pressure side of the compressor, help the compressor to load and protect the compressor, and simultaneously can ensure sufficient oil supply of the compressor by abandoning the mode of forced oil supply of an oil pump, thereby avoiding the unit cost from greatly increasing and simultaneously improving the reliability of the unit.
The valve cover of the existing pressure maintaining valve is provided with an internal extending valve sleeve integrated with the valve cover, a sliding block connected with the valve head only reciprocates in the valve sleeve, the sliding block and the valve sleeve are in direct contact friction to cause abrasion, the valve cover and the valve sleeve are required to be integrally replaced after the abrasion, and the problem of low economy exists. And the structure of the integrated valve cover and valve sleeve is complex, which also results in high processing difficulty and cost.
The valve head end of the existing pressure maintaining valve is provided with a sealing ring matched with a valve seat, in actual use, a refrigerant can enter a gap between the valve head and the sealing ring, and once the refrigerant expands, the sealing ring is impacted to cause damage, so that the condition of poor sealing is caused, and the establishment of high pressure and low pressure is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design out pressure maintenance valve and compressor, have simple structure, processing convenience, the characteristics of maintenance cost low.
The utility model discloses a following technical scheme realizes:
a pressure maintenance valve comprising:
the valve body is a three-way valve;
the valve cover connecting sleeve is detachably arranged at the air inlet of the low-pressure end of the valve body;
the valve cover is detachably connected with the air inlet of the low-pressure end of the valve body and tightly fixes the valve cover connecting sleeve to the valve body;
the valve core is arranged on the valve seat of the valve body and is movably matched with the inner wall of the valve cover connecting sleeve;
the first elastic piece is arranged between the valve cover and the valve core and used for providing opening pressure and resetting force for the valve core.
When the structure is arranged, the valve cover of the integrated structure in the prior art is divided into two independent parts, including the valve cover and the valve cover connecting sleeve, the processing difficulty and the processing cost of the valve cover can be reduced, the production efficiency is improved, the valve cover can be directly opened after the valve cover is partially abraded, and then the valve cover connecting sleeve is replaced, so that the replacement cost can be reduced.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the valve cover connecting sleeve and the pressing surface of the valve cover pressing are provided with a first annular groove, and a sealing ring is arranged in the first annular groove.
When the structure is adopted, after the valve cover and the valve sleeve are divided into two independent parts, the valve cover and the valve cover connecting sleeve need to be sealed, and the sealing ring arranged in the first annular groove can improve the sealing capacity between the valve cover and the valve cover connecting sleeve, so that air leakage is avoided.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the sealing ring arranged in the first annular groove is a spring sealing ring.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the spring sealing ring comprises a lip-shaped ring with an upper lip and a lower lip and a sealing ring spring which is arranged in the concave cavity and used for enabling the upper lip and the lower lip to expand outwards;
the upper lip and the lower lip are of inward-extending arc structures, and convex ring parts protruding outwards are arranged on sealing surfaces of the upper lip and the lower lip.
When the structure is arranged, the extrusion effect between the convex ring part and the end face of the valve cover is greater than that of other parts, and the sealing capacity of the part on the end face of the valve cover can be improved.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the sealing ring spring comprises a flat plate framework and a plurality of bent tooth parts symmetrically arranged on two sides of the flat plate framework, all the bent tooth parts are independent from each other, and the bent tooth parts abut against the upper lip and the lower lip to enable the upper lip and the lower lip to be expanded.
When adopting above-mentioned structure that sets up, dull and stereotyped skeleton of dull and stereotyped structure is compared in the skeleton of arc bending structure and can be made the tooth portion of buckling and provide stronger external expanding sealed effect for the lip circle.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the bent tooth part is of an arc structure which is in copying fit with the inner walls of the upper lip and the lower lip.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the case with disk seat complex terminal surface is provided with the second annular groove, set up valve seat sealing washer in the second annular groove, valve seat sealing washer with the terminal surface of second annular groove tank bottom contact is provided with the buffering recess, valve seat sealing washer is provided with the pressure release hole, two openings in pressure release hole are located respectively the cell wall department of buffering recess with valve seat sealing washer's inside wall department be used for with the second annular groove with the air inlet UNICOM of valve body.
When the structure is arranged, the pressure relief hole is favorable for rapidly discharging the refrigerant entering the valve seat sealing ring, and the situation of poor sealing caused by damage to the valve seat sealing ring due to expansion impact after the refrigerant is not timely or discharged is avoided.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the valve core comprises a valve head and a sliding block, the valve head is used for being matched with the valve seat, and the sliding block is used for being matched with the valve cover connecting sleeve.
When the structure is adopted, the valve core comprises the valve head and the sliding block, and the maintenance cost of the valve core can be reduced.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: one end of the valve head is movably inserted into the sliding block, a small spring is arranged between the sliding block and the valve head, and the small spring is used for enabling the valve head to press the valve seat.
The utility model also provides a refrigeration compressor, maintain the valve including compressor and foretell pressure, the air inlet of pressure maintenance valve with the oil separator of compressor is connected, the low-pressure end air inlet of pressure maintenance valve with the suction end of compressor is connected.
The utility model has the advantages of it is following and beneficial effect:
the utility model discloses in, fall into the independent part of two parts with the valve gap of an organic whole structure among the prior art, including valve gap and valve gap adapter sleeve, not only can reduce the processing degree of difficulty and the processing cost of valve gap, improve production efficiency, also can directly open the valve gap after valve gap part wearing and tearing again with the valve gap adapter sleeve renew can, reducible replacement cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of the pressure maintenance valve;
FIG. 2 is an enlarged partial view of portion A of FIG. 1;
FIG. 3 is an enlarged partial view of portion B of FIG. 2;
FIG. 4 is a schematic diagram of the construction of a sealing ring spring;
FIG. 5 is an enlarged partial view of section C of FIG. 2;
labeled as:
1. a valve body; 2. a valve head; 3. a valve seat sealing ring; 4. a slider; 5. a spring washer; 6. an O-shaped ring; 11. a bolt; 12. a valve cover; 13. a right angle joint; 16. the valve cover is sleeved; 17. a paper shim; 18. a first elastic member; 19. a small spring; 20. a needle valve body; 21. a valve core; 27. a first ring groove; 28. a spring seal ring; 29. a lip-shaped ring; 30. the upper lip; 31. a lower lip; 32. a concave cavity; 33. a convex ring part; 34. a seal ring spring; 35. a flat plate skeleton; 36. bending the tooth part; 37. a buffer groove; 38. a pressure relief vent; 39. a loop is provided.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
the pressure maintaining valve has the characteristics of simple structure, convenient processing and low maintenance cost, and is particularly set to be the following structure as shown in figures 1, 2, 3, 4 and 5:
basically, the pressure maintenance valve includes a valve body 1, a bonnet nipple 16, a bonnet 12, a valve core, and a first elastic member 18.
The valve body 1 is a three-way valve and is provided with an air inlet, an air outlet and a low-pressure end air inlet, the axis of the air inlet coincides with the axis of the low-pressure end air inlet, the axis of the air inlet is perpendicular to the axis of the air outlet, channels of the three ports of the air inlet, the air outlet and the low-pressure end air inlet are converged at one position, and a valve seat is arranged at the converged position and used for arranging a valve core.
The valve cover connecting sleeve 16 is a through hole type upper end flange structural member, a counter bore is arranged at the air inlet of the low pressure end of the valve body 1, the end of the valve cover 12 is also provided with a counter bore which is matched with the counter bore arranged at the air inlet of the low pressure end of the valve body 1 in an aligning way, paper gaskets 17 are respectively paved in the counter bores of the valve cover connecting sleeve 16 and the valve body 1, the bottom end of the flange of the valve cover connecting sleeve 16 is seated at the paper gaskets 17 of the counter bore arranged at the air inlet of the low pressure end of the valve body 1, and the valve sleeve part of the valve cover connecting sleeve.
The valve cover 12 is also a flange part, the valve cover 12 is detachably connected to the air inlet of the low-pressure end of the valve body 1 through a bolt 11, a paper gasket 17 arranged in a counter bore of the valve cover 12 is erected at the top end of the valve cover connecting sleeve 16, the valve cover connecting sleeve 16 is located in a counter bore formed between the valve cover 12 and the valve body 1, the valve cover 12 compacts and fixes the valve cover connecting sleeve 16 on the end face of the valve body 1, and the detachable connection of the air inlet of the low-pressure end of the valve body 1 and the valve cover connecting sleeve 16 is achieved.
The valve core is arranged at the valve seat of the valve body 1, the valve core is movably matched with the inner wall of the valve cover connecting sleeve 16, the valve core is provided with two O-shaped rings 6, and the valve core can reciprocate up and down along the valve cover connecting sleeve 16 to complete the opening and closing action of the valve core.
First elastic component 18 sets up in the space between valve gap 12 and the case, and valve gap 12 is supported on the top of first elastic component 18, and the top of case is supported on the bottom of first elastic component 18, and first elastic component 18 is used for providing opening pressure and the power that resets along the air inlet axis direction for the case, and in this embodiment, first elastic component 18 is preferably coil spring, and the case top is processed there is the spring holder, and the pad is equipped with spring shim 5 in the spring holder, and spring shim 5 department in the spring holder at case top is supported in the bottom of this coil spring.
The valve cover with the integrated structure in the prior art is divided into two independent parts, including the valve cover 12 and the valve cover connecting sleeve 16, the previous complex integrated part structure is divided into two independent parts with simpler structures, the processing difficulty and the processing cost of the valve cover can be reduced, the production efficiency is improved, the valve cover 12 can be directly opened after the valve cover is partially abraded, then the valve cover connecting sleeve 16 is replaced, and the replacement cost can be reduced. The valve assembly is more convenient by pressing and fixing the valve cover connecting sleeve 16 through the valve cover 12, the valve core can be positioned more reliably, and the valve performance is stable and reliable.
As a preferable sealing scheme of the bonnet adapter 16 and the bonnet 12 in this embodiment, the bonnet adapter 16 and the bonnet 12 are two components that are fixed and sealed by pressing, so that the fixing and sealing effects between the bonnet adapter 16 and the bonnet 12 are realized by a pressing surface, and the machining precision and the matching precision required by the pressing surface of the bonnet adapter 16 and the bonnet 12 are high. The first annular groove 27 is formed in the pressing surface where the valve cover connecting sleeve 16 and the valve cover 12 are pressed, the sealing ring is arranged in the first annular groove 27, the sealing effect is achieved or assisted to achieve jointly through the sealing ring, the processing difficulty and cost of the valve cover 12 and the valve cover connecting sleeve 16 can be reduced, and the sealing capacity between the valve cover 12 and the valve cover connecting sleeve 16 can also be improved.
Specifically, the sealing ring disposed in the first annular groove 27 is selected as a spring sealing ring 28, the spring sealing ring 28 includes a lip ring 29 and a sealing ring spring 34, the lip ring 29 has an upper lip 30 and a lower lip 31 symmetrically disposed, the upper lip 30 and the lower lip 31 are of an inwardly extending arc structure, a cavity 32 is formed between the upper lip 30 and the lower lip 31, and the sealing ring spring 34 is mounted in the cavity 32 for expanding the upper lip 30 and the lower lip 31 outwardly for providing a strong sealing effect.
As a preferable structure of the spring sealing ring in the present embodiment, the sealing surfaces of the upper lip 30 and the lower lip 31 are both provided with convex ring portions 33, the cross section of the convex ring portions 33 is similar to a triangle, but the head portions are rounded heads with gentle transitions. When in sealing, the valve cover 12 and the valve cover connecting sleeve 16 which need to be sealed simultaneously press the upper lip 30 and the lower lip 31, the convex ring part 33 is more convex than other parts, so that the pressing effect between the convex ring part 33 and the end surface of the valve cover 12 is larger than that of other parts, and the sealing capability of the part on the end surface of the valve cover 12 can be improved.
The springs used in the existing spring sealing rings are generally spiral type or V-shaped springs. The coil type spring itself is characterized by a pitch, and thus, the elastic force generated to the lip 29 cannot be continuous. The framework of the V-shaped spring can be bent to form a fillet, continuous and uniform load cannot be provided after the framework forms a ring, and sealing of low-leakage occasions is difficult to meet. As a preferred structure scheme of the seal ring spring 34 in this embodiment, the seal ring spring includes a flat plate frame 35 and a plurality of bending tooth portions 36 symmetrically disposed on both sides of the flat plate frame 35, the flat plate frame 35 is of a flat plate structure, all the bending tooth portions 36 are independent from each other without bending design, the bending tooth portions 36 are arc-shaped structures which are in profiling fit with the inner walls of the upper lip 30 and the lower lip 31, and the bending tooth portions 36 abut against the upper lip 30 and the lower lip 31 to expand the upper lip 30 and the lower lip 31. The flat plate framework 35 of the flat plate structure can enable the bent tooth part 36 to provide a stronger outward expanding sealing effect for the lip-shaped ring 29 compared with the framework of the arc-shaped bent structure, and has the characteristic of low leakage amount.
A needle valve body 20 for detecting internal pressure is respectively arranged at the air inlet channel part and the air outlet channel part of the valve body 1, a valve core 21 is arranged in the needle valve body 20, and a sealing ring and a nut which are matched with each other are arranged at the end part of the needle valve body 20.
After the valve cover and the valve sleeve are divided into two independent components, namely the valve cover 12 and the valve cover connecting sleeve 16, the valve cover 12 and the valve cover connecting sleeve 16 need to be sealed to prevent leakage, the valve cover connecting sleeve 16 and the valve cover 12 are two components which are fixed and sealed through pressing, so that the valve cover connecting sleeve 16 and the valve cover 12 realize the fixing and sealing effects through a pressing surface, the machining precision and the matching precision required by the pressing surface of the valve cover connecting sleeve 16 and the valve cover 12 are higher, and the sealing ring arranged in the first annular groove 27 can improve the sealing capacity between the valve cover 12 and the valve cover connecting sleeve 16 and avoid air leakage. The paper gasket 17 is arranged to protect the press-fit surface, so that surface crushing is avoided and the sealing effect is improved, meanwhile, if the valve core is opened fully, the valve core can be abutted against the bottom end of the valve cover connecting sleeve 16, and the paper gasket 17 is arranged to avoid hard collision between the valve cover 12 and the valve cover connecting sleeve 16 and between the valve cover connecting sleeve 16 and the valve body 1 under the condition, so that no abnormal sound is generated when the valve core is opened fully.
Example 2:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
the end face, matched with the valve seat, of the valve core is provided with a second annular groove, a valve seat sealing ring 3 is arranged in the second annular groove, an inwards concave buffering groove 37 is arranged on the end face, contacted with the bottom of the second annular groove, of the top end of the valve seat sealing ring 3, the buffering groove 37 is preferably an arc groove, the valve seat sealing ring 3 is provided with pressure relief holes 38, the pressure relief holes are generally two or four, and the pressure relief holes 38 are arranged along the circumferential equal-interval angular distribution of the valve seat sealing ring 3. Two openings of the pressure relief hole 38 are respectively located at the groove wall of the buffer groove 37 and the inner side wall of the valve seat sealing ring to form an inclined hole, and the pressure relief hole 38 is used for communicating the second annular groove with the air inlet of the valve body 1. The pressure relief hole 38 is beneficial to discharging the refrigerant entering the valve seat sealing ring 3 quickly, and avoids the situation of poor sealing caused by damage to the valve seat sealing ring 3 due to expansion impact after the refrigerant is not discharged in time.
Example 3:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
the valve core comprises two mutually independent parts, including valve head 2 and slider 4, valve head 2 is used for cooperating with the disk seat, slider 4 is used for with valve gap nipple 16 clearance fit. Wherein, valve head 2 is located the disk seat department of valve body 1, and slider 4 and the inner wall clearance fit of valve gap adapter sleeve 16, and two rings of grooves have been seted up to the outer wall department of slider 4, and every circle inslot is provided with one O type circle 6, and slider 4 can accomplish the action of opening and shutting of case along valve gap adapter sleeve 16 up-and-down reciprocating motion.
The valve core comprises a valve head 2 and a sliding block 4, the structure complexity can be reduced, the processing difficulty is reduced, the production efficiency is improved, the abrasion part of the sliding block 4 can be replaced independently, and the maintenance cost of the valve core is reduced. One end of the valve head 2 is provided with a cylinder structure, the cylinder structure is movably inserted into the sliding block 4, a small spring 19 is arranged between the sliding block 4 and the valve head 2, and the small spring 19 is arranged in the cylinder structure and used for enabling the valve head 2 to compress the valve seat and enabling the valve head 2 to be rapidly closed.
Example 4:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
the O-shaped ring 6 which is arranged on the valve core and is used for being in sealing fit with the valve cover connecting sleeve 16 belongs to a quick-wear part and is easy to wear after long-term use, so that the O-shaped ring 6 is sleeved with the ring sleeve 39 to protect the O-shaped ring 6, and the integral durability of the O-shaped ring 6 is improved. Specifically, the ring sleeve 39 is a structural member made of polytetrafluoroethylene material, the cross section of the ring sleeve 39 is in the shape of a semicircular groove, the inner diameter of the semicircular groove is slightly smaller than the diameter of the circular cross section of the O-shaped ring 6, so that the O-shaped ring 6 can be stably clamped on the inner side of the ring sleeve 39, when the ring sleeve 39 is sleeved on the O-shaped ring 6, the ring sleeve 39 faces outwards and is directly contacted with the valve cover sleeve 16, the sealing performance of the sliding block 4 and the valve cover sleeve 16 can be improved, the abrasion of the O-shaped ring 6 can be reduced, and therefore the service life of the pressure maintaining valve is effectively prolonged.
Example 5:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
an arc-shaped groove is formed in one surface, namely the bottom surface, facing the air inlet end of the air inlet, of the valve head 2 to form a dome structure. The arrangement of the arc-shaped groove increases the stress area of the valve head 2, thereby effectively improving the valve opening sensitivity of the pressure maintaining valve, improving the opening degree of the valve head 2 and reducing the pressure loss of the valve.
Example 6:
the present embodiment further provides a refrigeration compressor based on the above embodiments, and particularly adopts the following arrangement structure:
the refrigeration compressor comprises a compressor and the pressure maintaining valve in the embodiment 1, the embodiment 2 or the embodiment 3, wherein the air inlet of the pressure maintaining valve is connected with an oil separator of the compressor through a connected lower sleeve, a right-angle joint 13 is installed at a valve cover 12 connected with the air inlet of the low-pressure end of the pressure maintaining valve, and the right-angle joint 13 is connected with the air suction end of the compressor.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (10)
1. A pressure maintenance valve, comprising:
the valve body (1), the said valve body (1) is the three-way valve;
the valve cover connecting sleeve (16), the valve cover connecting sleeve (16) is detachably arranged at the air inlet of the low-pressure end of the valve body (1);
the valve cover (12), the valve cover (12) is detachably connected with the air inlet of the low-pressure end of the valve body (1) and compacts and fixes the valve cover connecting sleeve (16) on the valve body (1);
the valve core is seated on the valve seat of the valve body (1) and is movably matched with the inner wall of the valve cover connecting sleeve (16);
the first elastic piece (18) is arranged between the valve cover (12) and the valve core, and is used for providing opening pressure and resetting force for the valve core.
2. The pressure maintenance valve of claim 1, wherein: the valve cover connecting sleeve (16) and the pressing surface pressed by the valve cover (12) are provided with a first annular groove (27), and a sealing ring is arranged in the first annular groove (27).
3. The pressure maintenance valve of claim 2, wherein: the sealing ring arranged in the first annular groove (27) is a spring sealing ring (28).
4. The pressure maintenance valve of claim 3, wherein: the spring sealing ring (28) comprises a lip-shaped ring (29) with an upper lip (30) and a lower lip (31) and a sealing ring spring (34) arranged in a cavity (32) and used for outwards expanding the upper lip (30) and the lower lip (31);
the upper lip (30) and the lower lip (31) are of inward-extending arc structures, and convex ring parts (33) are arranged on sealing surfaces of the upper lip (30) and the lower lip (31).
5. The pressure maintenance valve of claim 4, wherein: the sealing ring spring (34) comprises a flat plate framework (35) and a plurality of bending tooth parts (36) symmetrically arranged on two sides of the flat plate framework (35), all the bending tooth parts (36) are independent from each other, and the bending tooth parts (36) are propped against the upper lip (30) and the lower lip (31) to enable the upper lip and the lower lip to expand outwards.
6. The pressure maintenance valve of claim 5, wherein: the bent tooth part (36) is of an arc structure which is attached to the inner walls of the upper lip (30) and the lower lip (31) in a profiling mode.
7. The pressure maintenance valve according to any one of claims 1 to 6, wherein: the case with disk seat complex terminal surface is provided with the second annular groove, set up valve seat sealing washer (3) in the second annular groove, valve seat sealing washer (3) with the terminal surface of second annular groove tank bottom contact is provided with buffering recess (37), valve seat sealing washer (3) are provided with pressure release hole (38), two openings in pressure release hole (38) are located respectively the cell wall department of buffering recess (37) with valve seat sealing washer's inside wall department is used for with the second annular with the air inlet UNICOM of valve body (1).
8. The pressure maintenance valve of claim 7, wherein: the valve core comprises a valve head (2) and a sliding block (4), the valve head (2) is used for being matched with a valve seat, and the sliding block (4) is used for being matched with the valve cover joint sleeve (16).
9. The pressure maintenance valve of claim 8, wherein: one end of the valve head (2) is movably inserted into the sliding block (4), a small spring (19) is arranged between the sliding block (4) and the valve head (2), and the small spring (19) is used for enabling the valve head (2) to press the valve seat.
10. Refrigeration compressor, its characterized in that: comprising a compressor and a pressure maintenance valve according to any of claims 1-9, the inlet of which is connected to an oil separator of the compressor and the low pressure side inlet of which is connected to the suction side of the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020044721.3U CN211397826U (en) | 2020-01-09 | 2020-01-09 | Pressure maintaining valve and refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020044721.3U CN211397826U (en) | 2020-01-09 | 2020-01-09 | Pressure maintaining valve and refrigeration compressor |
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| Publication Number | Publication Date |
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| CN211397826U true CN211397826U (en) | 2020-09-01 |
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| CN202020044721.3U Active CN211397826U (en) | 2020-01-09 | 2020-01-09 | Pressure maintaining valve and refrigeration compressor |
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| CN (1) | CN211397826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140469A (en) * | 2020-01-09 | 2020-05-12 | 北京比泽尔制冷设备有限公司 | Pressure maintaining valve and refrigeration compressor |
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2020
- 2020-01-09 CN CN202020044721.3U patent/CN211397826U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140469A (en) * | 2020-01-09 | 2020-05-12 | 北京比泽尔制冷设备有限公司 | Pressure maintaining valve and refrigeration compressor |
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