CN212155092U - Piston and compressor - Google Patents
Piston and compressor Download PDFInfo
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- CN212155092U CN212155092U CN202020832715.4U CN202020832715U CN212155092U CN 212155092 U CN212155092 U CN 212155092U CN 202020832715 U CN202020832715 U CN 202020832715U CN 212155092 U CN212155092 U CN 212155092U
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 239000010687 lubricating oil Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 26
- 238000007789 sealing Methods 0.000 description 6
- 208000016261 weight loss Diseases 0.000 description 6
- 239000013585 weight reducing agent Substances 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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Abstract
The utility model provides a piston and compressor, wherein, the piston includes: a main body; a skirt portion provided at one end of the main body, at least part of the outer wall of the main body on the peripheral side protruding from the outer wall of the skirt portion on the peripheral side in the peripheral side direction of the main body; the one end of main part is located to the bellying, has the oilhole on the bellying, and the bellying is located the same one end of main part with the skirt portion. The utility model provides a piston, the outer wall protrusion of the week side of at least part main part is in the outer wall of week side of skirt section, skirt section's cross sectional area is less than the cross sectional area of main part promptly, realize losing weight to the piston, the area of contact of piston with the piston cylinder has also been reduced, reduce the frictional force of piston and piston cylinder, and be equipped with the oilhole on the bellying, can carry lubricating oil when the piston operation, reduce the frictional force of piston and piston cylinder, the income power has been reduced, the start-up degree of difficulty of compressor has been reduced, and improve compressor's efficiency to a certain extent, reciprocating compressor's operating stability is improved.
Description
Technical Field
The utility model relates to a compressor technical field particularly, relates to a piston and a compressor.
Background
In the related art, for a reciprocating piston compressor, a piston reciprocates in a cylinder to compress a refrigerant to do work, the pressure in the piston cylinder is changed violently when the piston moves in the piston cylinder, the matching precision requirement between the piston and the wall of the piston cylinder is very high, the sealing requirement is met, the motion guide effect of the piston in the cylinder is achieved, and the motion track of the piston is ensured.
Specifically, as shown in fig. 1 and 2, the piston 100' includes: the main body 110 'and the skirt portion 120' have the same outer diameter, and the pin bosses 130 'have a semi-cylindrical structure, and an oil hole 150' is formed between the main body 110 'and the skirt portion 120'.
In the course of the work, can cause the piston cylinder inner wall to take place micro deformation when the piston cylinder internal pressure acutely changes, the piston leads to scraping between piston cylinder inner wall and the piston body in the piston cylinder high-speed motion, all has certain harm to piston and piston cylinder.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
Therefore, the utility model discloses a first aspect provides a piston.
The utility model discloses the second aspect provides a compressor.
An embodiment of the first aspect of the present invention provides a piston, including: a main body; a skirt portion provided at one end of the main body, at least part of the outer wall of the main body on the peripheral side protruding from the outer wall of the skirt portion on the peripheral side in the peripheral side direction of the main body; the one end of main part is located to the bellying, has the oilhole on the bellying, and the bellying is located the same one end of main part with the skirt portion.
The utility model provides a piston, comprising a main body, skirt section and bellying, wherein, skirt section and bellying set up the same one end in the main part, and, the outer wall protrusion in the outer wall of all sides of skirt section of all sides of at least part main part, the cross sectional area of skirt section is less than the cross sectional area of main part promptly, the realization is to losing weight of piston, the area of contact of piston and piston cylinder has also been reduced, reduce the frictional force of piston and piston cylinder, and be equipped with the oilhole on the bellying, can carry lubricating oil when the piston moves, reduce the frictional force of piston and piston cylinder, realize sealed between piston and the piston rod, and then reduced the scraping between piston and the piston rod, the entry has been reduced, the start-up degree of difficulty of compressor has been reduced, and improve compressor's efficiency to a certain extent, improve compressor's.
According to the utility model discloses above-mentioned technical scheme's piston can also have following additional technical characterstic:
on the basis of the technical scheme, the side wall of at least part of the boss is coplanar with the outer wall of the peripheral side of the main body, and the opening of the oil hole is positioned on the side wall of the boss which is coplanar with the outer wall of the peripheral side of the main body.
In the technical scheme, the side wall of at least part of the protruding part is coplanar with the outer wall of the peripheral side of the main body, the opening of the oil hole is positioned on the side wall of the protruding part which is coplanar with the outer wall of the peripheral side of the main body, the opening of the oil hole is ensured to be attached to the inner wall of the piston cylinder, and then the oil is directly conveyed to the inner wall of the piston cylinder through the oil hole, so that the lubricating and sealing effects are ensured.
In any one of the above aspects, the number of the protrusions is plural, and the plurality of protrusions are provided on the peripheral side of the skirt portion at intervals.
In the technical scheme, multi-point oil transportation is realized through the plurality of the convex parts, and the lubrication and the sealing of the piston and the piston cylinder are ensured in a whole circle.
On the basis of any one of the above technical solutions, further, the main body is provided with a groove, and the opening direction of the groove faces the skirt portion; the skirt portion is provided with a cavity which is communicated with the groove.
In this technical scheme, set up the recess at the main part, set up the cavity at the skirt portion, further realize the shock attenuation to the piston, increase the stationarity of piston operation.
On the basis of any one of the above technical solutions, further, the method further includes: the first pin seat is arranged in the groove and the cavity, the first pin seat is connected with the side walls of the main body and the skirt part, and the first pin seat is provided with a first pin hole; the second pin seat is arranged in the groove and the cavity, the second pin seat is connected with the side walls of the main body and the skirt part, and a second pin hole is formed in the second pin seat; the first pin seat and the second pin seat are arranged oppositely, and the first pin hole and the second pin hole are arranged oppositely.
In this technical scheme, the piston still includes first key seat and second key seat, and relative setting is in the inside of main part and piston to, first key seat is equipped with first pinhole, and the second key seat is equipped with the second pinhole, and then the piston accessible round pin is connected with the piston rod.
On the basis of any one of the above technical solutions, further, the end surface of the first pin seat, which is away from the main body side, is retracted towards the main body relative to the end surface of the skirt portion, which is away from the main body side; the second pin boss deviates from the end surface of one side of the main body, deviates from the end surface of one side of the main body relative to the skirt part and retracts towards the direction of the main body.
In the technical scheme, the end faces of the first pin seat and the second pin seat, which are far away from one side of the main body, are retracted towards the main body scheme, so that the weight reduction of the piston is realized, and the stability of the piston during movement is improved.
On the basis of any one of the above technical solutions, further, one side of the first pin seat opposite to the second pin seat is convexly arranged.
In the technical scheme, the first pin seat and the second pin seat do not adopt a semi-cylindrical structure, but adopt a structure with a raised middle part, so that the edge is removed under the condition of ensuring the function of the pin seats, the weight reduction of the piston is further realized, and the stability of the piston during movement is improved.
On the basis of any one of the above technical solutions, further, the range of values of the outer wall of at least part of the peripheral side of the main body protruding from the outer wall of the peripheral side of the skirt portion is: 0.5mm to 1 mm.
In this technical scheme, rationally set up the size difference of main part and skirt portion to guarantee the stability of piston.
On the basis of any one of the above technical solutions, further, the main body is a cylindrical structure.
In this technical scheme, the main part is cylindrical structure, and is cylindrical when carrying out reciprocating motion, has good mechanical properties, can avoid local deformation, guarantees the stability when the piston moves.
An embodiment of the second aspect of the present invention provides a compressor, including: a piston cylinder; a piston as set forth in any of the above solutions; and the piston rod is connected with the piston and can drive the piston to reciprocate in the piston cylinder.
The utility model provides a compressor, because of the piston that any one of above-mentioned technical scheme provided, consequently, has the whole beneficial effect of the piston that any one of above-mentioned technical scheme provided, no longer states one by one here.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view showing a structure of a piston in the related art;
FIG. 2 is a schematic view showing another perspective structure of a piston in the related art;
fig. 3 shows a schematic structural diagram of a piston provided by the present invention;
fig. 4 is a schematic structural view of another perspective of the piston provided by the present invention;
fig. 5 is a schematic structural view illustrating yet another view angle of the piston provided by the present invention;
fig. 6 shows a cross-sectional view of a piston provided by the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
100 ' piston, 110 ' main body, 120 ' skirt, 130 ' pin boss, 150 ' oil hole;
wherein, the correspondence between the reference numbers and the part names in fig. 3 to 6 is:
100 piston, 110 main body, 112 groove, 120 skirt, 132 first pin boss, 134 second pin boss, 136 first pin hole, 138 second pin hole, 140 boss, 150 oil hole.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A piston 100 and a compressor provided according to some embodiments of the present invention will be described below with reference to fig. 3 to 6.
Example 1:
as shown in fig. 3 to 6, an embodiment of the present invention provides a piston 100, including: the oil cylinder comprises a main body 110, a skirt part 120 and a boss part 140, wherein the skirt part 120 and the boss part 140 are arranged at the same end of the main body 110, at least part of the outer wall of the peripheral side of the main body 110 protrudes out of the outer wall of the peripheral side of the skirt part 120 in the radial direction of the main body 110, and the boss part 140 is provided with an oil hole 150.
The present invention provides a piston 100, comprising a main body 110, a skirt portion 120 and a boss portion 140, wherein the skirt portion 120 and the boss portion 140 are provided at the same end of the body 110, and at least a part of the peripheral side outer wall of the body 110 is protruded from the peripheral side outer wall of the skirt portion 120, that is, the cross-sectional area of the skirt portion 120 is smaller than that of the body 110, so that the weight of the piston 100 is reduced, the contact area of the piston 100 with the cylinder is also reduced, the frictional force between the piston 100 and the cylinder is reduced, and the oil hole 150 is formed in the boss portion 140, can deliver lubricating oil when the piston 100 runs, reduce the friction force between the piston 100 and a piston cylinder, realize the sealing between the piston 100 and a piston rod, thereby reducing the scraping between the piston 100 and the piston rod, reducing the input force, reducing the starting difficulty of the compressor, and improves the efficiency of the compressor to a certain extent and improves the operation stability of the reciprocating compressor.
Further, the peripheral outer wall of all the bodies 110 protrudes from the peripheral outer wall of the skirt 120.
Example 2:
as shown in fig. 3, 4 and 5, in embodiment 1, at least part of the side wall of the boss 140 is coplanar with the outer wall of the main body 110 on the peripheral side, and the opening of the oil hole 150 is located on the side wall of the boss 140 coplanar with the outer wall of the main body 110 on the peripheral side.
In this embodiment, at least a portion of the side wall of the protrusion 140 is coplanar with the outer wall of the main body 110, and the opening of the oil hole 150 is located on the side wall of the protrusion 140 coplanar with the outer wall of the main body 110, so as to ensure the close contact between the opening of the oil hole 150 and the inner wall of the piston cylinder, and further, the oil is directly fed to the inner wall of the piston cylinder through the oil hole 150, thereby ensuring the lubricating and sealing effects.
Specifically, the side walls of all the bosses 140 are coplanar with the outer wall of the circumferential side of the main body 110, and the openings of the oil holes 150 are located at the side walls of the bosses 140.
Example 3:
as shown in fig. 5, in addition to embodiment 1 or embodiment 2, a plurality of protrusions 140 are provided at one end of the body 110, and the plurality of protrusions 140 are provided at intervals on the peripheral side of the skirt portion 120.
In this embodiment, a plurality of protrusions 140 are disposed at one end of the main body 110 at intervals, and each protrusion 140 is provided with an oil hole 150, so that oil can be delivered at multiple points, thereby ensuring lubrication and sealing of the piston 100 and the piston cylinder.
Further, the plurality of protrusions 140 are uniformly disposed at one end of the protrusions 140.
Specifically, the number of the protrusions 140 may be 2, 3, 4, 5, or the like.
Example 4:
as shown in fig. 6, on the basis of any one of embodiments 1 to 3, further, a groove 112 is provided on a side of the main body 110 facing the skirt 120; the skirt 120 has a cavity that communicates with the groove 112.
In this embodiment, the groove 112 is formed in the main body 110, and the skirt portion 120 is provided with a cavity, and the groove 112 is communicated with the cavity, i.e. the piston 100 as a whole has a structure similar to a cup, so as to further realize the shock absorption of the piston 100 and increase the smoothness of the operation of the piston 100.
Example 5:
as shown in fig. 5 and 6, on the basis of any one of embodiments 1 to 4, further, a first pin seat 132 and a second pin seat 134, wherein the first pin seat 132 is provided with a first pin hole 136, the second pin seat 134 is provided with a second pin hole 138, the first pin seat 132 is located in the groove 112 and the cavity, and the first pin seat 132 is connected with the side walls of the main body 110 and the skirt portion 120; a second keyway 134 is located within the recess 112 and the cavity, the second keyway 134 being connected to the body 110 and the side wall of the skirt 120; first pin seat 132 is disposed opposite second pin seat 134, and first pin hole 136 is disposed opposite second pin hole 138.
In this embodiment, the main body 110 and the inner side of the skirt portion 120 are further provided with a first pin seat 132 and a second pin seat 134, the first pin seat 132 and the second pin seat 134 are disposed opposite to each other, the first pin seat 132 is provided with a first pin hole 136, the second pin seat 134 is provided with a second pin hole 138, and then the pin shaft passes through the first pin hole 136 and the second pin hole 138 to connect the piston 100 and the piston rod, thereby ensuring the normal operation of the piston 100.
Example 6:
as shown in fig. 6, in embodiment 5, further, an end surface of the first pin holder 132 on the side away from the main body 110 is retracted in the direction of the main body 110 relative to an end surface of the skirt portion 120 on the side away from the main body 110; the end surface of the second pin boss 134 facing away from the main body 110 is recessed in the direction of the main body 110 relative to the end surface of the skirt portion 120 facing away from the main body 110.
In this embodiment, the end faces of the first pin seat 132 and the second pin seat 134 on the side away from the main body 110 are recessed toward the main body 110, so that the weight of the piston 100 is reduced, and the stability of the piston 100 during movement is increased.
Example 7:
as shown in fig. 5, in addition to embodiment 5 or embodiment 6, further, a side of the first pin holder 132 opposite to the second pin holder 134 is provided in a protruding manner. I.e., the first pin seat 132 faces away from the boss; the second pin boss 134 is boss-shaped.
In this embodiment, the first pin seat 132 and the second pin seat 134 do not have a semi-cylindrical structure, but have a convex structure, so that the lengths of the first pin hole 136 and the second pin hole 138 are ensured, the pin shaft has a sufficient contact area with the piston 100, the connection strength of the piston 100 and the piston rod is ensured, the volumes of the first pin seat 132 and the second pin seat 134 are reduced, and compared with the piston 100' in the related art, the edges on both sides of the pin seats are removed, so that weight reduction is achieved, and the stability of the piston 100 during movement is increased.
Specifically, the side of first pin boss 132 opposite second pin boss 134 may be provided with an arc-shaped protrusion or a square-shaped protrusion.
Example 8:
in addition to any one of embodiments 1 to 7, further, the range of values of the outer wall of at least a part of the main body 110 protruding from the skirt portion 120 on the circumferential side is: 0.5mm to 1 mm.
In this embodiment, the size difference between the body 110 and the skirt 120 is properly set to ensure the stability of the piston 100.
Specifically, the value range of the outer wall of the main body 110 protruding from the outer wall of the skirt portion 120 is: 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc.
Example 9:
as shown in fig. 5, on the basis of any one of embodiments 1 to 8, further, the main body 110 has a cylindrical structure.
In this embodiment, the main body 110 is a cylindrical structure, and the cylindrical structure has good mechanical properties when reciprocating, so as to avoid local deformation and ensure the stability of the piston 100 during operation.
Example 10:
the utility model provides a piston 100 includes: a main body 110, a skirt 120 having a height difference with the main body 110, two-part protrusions 140 extending from the main body 110 to the skirt 120, a piston 100 pin boss connected with a connecting rod, and the whole piston 100 having a cylindrical shape fitting the inner wall of a piston cylinder; at least part of the outer surface of the skirt portion 120 is located inside the outer surface of the main body 110, a height difference is left between the outer surface of the main body 110 and at least part of the height difference between the protrusion 140 and the outer surface of the main body 110 is zero, meanwhile, an oil leakage hole (oil hole 150) is formed in the protrusion 140 so as to facilitate the lubrication of the input lubricating oil, and the first pin seat 132 and the second pin seat 134 are subjected to weight reduction treatment compared with the pin seat 130' in the related art, that is, the first pin seat 132 and the second pin seat 134 in a boss shape are adopted, and the edges of the first pin seat 132 and the second pin seat 134 are removed.
The utility model provides a compressor piston 100, in piston 100 is high-speed in the piston cylinder, can reduce the scraping of skirt portion 120 and the piston cylinder inner wall of piston 100, main part 110 can play sealed effect well again simultaneously, and protruding portion 140 part is provided with the oil leak hole, can make the fine flow direction main part 110 of oil, lubricates main part 110 simultaneously, and piston 100 key seat subtracts heavy processing in step, so the utility model provides a piston 100 quality is light, heat conductivility is good, and the quality is lighter simultaneously, has reduced the income power, has reduced the start-up degree of difficulty of compressor to improve compressor's efficiency to a certain extent, improve reciprocating compressor's operating stability greatly.
Specifically, the present invention provides a piston 100 comprising: the piston 100 comprises a main body 110, a skirt 120 with a height difference with the main body 110, two parts of bulges extending from the main body 110 to the skirt 120, a piston 100 pin seat connected with a connecting rod, and the whole piston 100 is in a cylindrical shape attached to the inner wall of a piston cylinder.
At least part of the outer surface of the skirt portion 120 is located inside the outer surface of the main body 110, a height difference is left between the outer surface of the main body 110 and at least part of the protrusions, and the height difference between the outer surface of the main body 110 and at least part of the protrusions is zero, and oil leakage holes are formed in the protrusions 140 for lubrication, so that the pin boss of the piston 100 is subjected to weight reduction compared with the conventional piston 100.
Further, the piston 100 is cylindrical and fits against the inner wall of the piston cylinder.
Further, the outer surface of the skirt 120 is located inside the outer surface of the body 110.
Further, the skirt 120 has a height difference with the body 110, ranging from 0.5mm to 1 mm.
Further, at least a portion of the protrusions have zero height difference with the outer surface of the body 110 and extend from the body 110 to the skirt 120.
Further, oil leakage holes are provided at the boss 140 portion for lubrication.
Further, the first pin bosses 132 and the second pin bosses 134 perform a weight reduction process on the pin bosses 130 'of the piston 100' of the related art, such as shown in fig. 1 and 2.
An embodiment of a second aspect of the present invention provides a compressor, including: a piston cylinder; the piston 100 provided in any of the above embodiments; and the piston rod is connected with the piston 100 and can drive the piston 100 to reciprocate in the piston cylinder.
The present invention provides a compressor, which has all the advantages of the piston 100 provided by any of the above embodiments because of the piston 100 provided by any of the above embodiments, and is not stated herein one by one.
The utility model provides a compressor subtracts heavy piston 100 through this, makes the compressor at the operation in-process, because this piston 100 quality is light, heat conductivility is good, and the quality is lighter simultaneously, has reduced the income power, has reduced the degree of difficulty that the compressor starts to improve compressor's efficiency to a certain extent, improve reciprocating compressor's operating stability greatly.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A piston, comprising:
a main body;
a skirt portion provided at one end of the body, at least a part of an outer wall of the body on the circumferential side protruding from an outer wall of the skirt portion on the circumferential side in the circumferential direction of the body;
the bellying is located the one end of main part, the last oilhole that has of bellying, the bellying with the skirt portion is located the same one end of main part.
2. The piston of claim 1,
at least part of the side wall of the boss is coplanar with the outer wall of the peripheral side of the main body, and the opening of the oil hole is located on the side wall of the boss which is coplanar with the outer wall of the peripheral side of the main body.
3. The piston of claim 1,
the quantity of bellying is a plurality of, a plurality of bellying interval set up in the week side of skirt portion.
4. The piston according to any one of claims 1 to 3,
the main body is provided with a groove, and the opening direction of the groove faces the skirt part;
the skirt has a cavity in communication with the groove.
5. The piston of claim 4, further comprising:
the first pin seat is arranged in the groove and the cavity, the first pin seat is connected with the main body and the side wall of the skirt part, and the first pin seat is provided with a first pin hole;
the second pin seat is arranged in the groove and the cavity, the second pin seat is connected with the main body and the side wall of the skirt part, and a second pin hole is formed in the second pin seat;
the first pin seat and the second pin seat are arranged oppositely, and the first pin hole and the second pin hole are arranged oppositely.
6. The piston of claim 5,
the end surface of one side, away from the main body, of the first pin seat is retracted towards the direction of the main body relative to the end surface of one side, away from the main body, of the skirt part;
the end face of the second pin boss, which is far away from one side of the main body, is retracted towards the direction of the main body relative to the end face of the skirt part, which is far away from one side of the main body.
7. The piston of claim 5,
one side of the first pin seat opposite to the second pin seat is arranged in a protruding mode.
8. The piston according to any one of claims 1 to 3,
the value range of the outer wall of the peripheral side of at least part of the main body protruding out of the outer wall of the peripheral side of the skirt part is as follows: 0.5mm to 1 mm.
9. The piston according to any one of claims 1 to 3,
the main body is of a cylindrical structure.
10. A compressor, comprising:
a piston cylinder;
the piston of any one of claims 1 to 9;
and the piston rod is connected with the piston and can drive the piston to reciprocate in the piston cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020832715.4U CN212155092U (en) | 2020-05-15 | 2020-05-15 | Piston and compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020832715.4U CN212155092U (en) | 2020-05-15 | 2020-05-15 | Piston and compressor |
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| CN212155092U true CN212155092U (en) | 2020-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669230A (en) * | 2020-05-15 | 2021-11-19 | 安徽美芝制冷设备有限公司 | Piston and compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669230A (en) * | 2020-05-15 | 2021-11-19 | 安徽美芝制冷设备有限公司 | Piston and compressor |
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