CN117662478A - Compressor suction structure and compressor - Google Patents
Compressor suction structure and compressor Download PDFInfo
- Publication number
- CN117662478A CN117662478A CN202211005512.8A CN202211005512A CN117662478A CN 117662478 A CN117662478 A CN 117662478A CN 202211005512 A CN202211005512 A CN 202211005512A CN 117662478 A CN117662478 A CN 117662478A
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- compressor
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- air suction
- connecting pipe
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- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 230000001965 increasing effect Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a compressor air suction structure and a compressor, wherein the compressor air suction structure comprises an air suction channel penetrating through the inner peripheral surface and the outer peripheral surface of a compressor cylinder and an air inlet connecting pipe connected with the air suction channel; a labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe. According to the air suction structure of the compressor, the labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe, so that refrigerant leakage between the air suction channel and the air inlet connecting pipe can be effectively reduced; meanwhile, the contact thermal resistance between the air suction channel and the air inlet connecting pipe is increased, so that the heating of the air suction channel to the refrigerant is reduced, the air suction overheat generated by the heating is avoided, and the performance of the compressor is improved.
Description
Technical Field
The invention relates to the field of compressors, in particular to a compressor air suction structure and a compressor.
Background
When the rolling rotor compressor operates, refrigerant of the system enters the compressor from the liquid storage device, then enters the cylinder from the air inlet connecting pipe through the air suction hole of the cylinder for compression, and finally high-temperature and high-pressure gas is discharged. In order to prevent refrigerant leakage, the air inlet connecting pipe is connected with the air suction channel in an interference fit connection mode when being assembled, but under the condition of different internal and external pressure differences, high-temperature and high-pressure air which is compressed completely can leak into the channel through the connecting part of the air inlet connecting pipe and the air suction channel and enter the air cylinder, so that repeated compression is caused; meanwhile, heat conducted from the inner wall of the air suction channel can heat the refrigerant sucked into the air cylinder through the air suction connecting pipe, so that air suction overheat is caused, and the performance of the compressor is not improved.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the invention and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a compressor air suction structure and a compressor, wherein the compressor air suction structure can effectively reduce the leakage of a refrigerant between an air suction channel and an air inlet connecting pipe and effectively increase the contact thermal resistance between the air suction channel and the air inlet connecting pipe, thereby improving the overall performance of the compressor.
A first aspect of the present invention provides a compressor suction structure including a suction passage penetrating an inner circumferential surface and an outer circumferential surface of a compressor cylinder and a suction connection pipe connected to the suction passage;
a labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe.
According to a first aspect of the invention, the labyrinth seal structure comprises a labyrinth groove and a seal;
the inner wall of the air suction channel is provided with the labyrinth groove, and the outer wall of the air inlet connecting pipe is a cylindrical sealing piece; or (b)
The outer wall of the air inlet connecting pipe is provided with the labyrinth groove, and the inner wall of the air suction channel is a cylindrical sealing piece.
According to a first aspect of the invention, the labyrinth grooves are straight-through labyrinth grooves or staggered labyrinth grooves.
According to a first aspect of the invention, the labyrinth grooves are spiral grooves.
According to a first aspect of the invention, the labyrinth grooves are a plurality of discrete annular grooves.
According to a first aspect of the invention, the labyrinth grooves are semi-circular, arc-shaped or polygonal in cross section.
According to the first aspect of the invention, the distance between the end of the labyrinth groove away from the compressor housing and the end face of the air inlet connecting pipe in the air suction channel is L1, and the following conditions are satisfied: l1 is less than or equal to 10mm.
According to the first aspect of the invention, the distance between the end of the labyrinth groove near the compressor housing and the end of the suction passage near the compressor housing is L2, and the following is satisfied: l2 > 0.
According to the first aspect of the present invention, the labyrinth groove has an axial width d along the extending direction of the suction passage, and satisfies: d is less than or equal to 10mm.
A second aspect of the present invention provides a compressor comprising the compressor suction structure.
According to the air suction structure of the compressor, the labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe, so that refrigerant leakage between the air suction channel and the air inlet connecting pipe can be effectively reduced; meanwhile, the contact thermal resistance between the air suction channel and the air suction connecting pipe is increased, so that the heating of the air suction channel to the refrigerant is reduced, the air suction overheat generated by the heating is avoided, the performance of the compressor is improved, and in addition, the air suction structure of the compressor has the advantages of simple structure, easiness in processing and the like.
Drawings
Other features, objects, and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments, which is incorporated in and forms a part of the specification, illustrating embodiments consistent with the present application, and together with the description serve to explain the principles of the present application, by referring to the following figures. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
FIG. 1 is a schematic view showing a structure of a compressor according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the circular dashed box of FIG. 1;
FIG. 3 is a schematic cross-sectional view of an inhalation channel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an inhalation channel according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of an inhalation channel according to a further embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," 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 present specification. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples and the features of the different embodiments or examples presented in this specification may be combined and combined by those skilled in the art without contradiction.
Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" with other elements interposed therebetween. Terms representing relative spaces such as "lower", "upper", and the like may be used to more easily describe the relationship of one device to another device as illustrated in the figures. Such terms refer not only to the meanings indicated in the drawings, but also to other meanings or operations of the device in use. For example, if the device in the figures is turned over, elements described as "under" other elements would then be described as "over" the other elements. Thus, the exemplary term "lower" includes both upper and lower. The device may be rotated 90 deg. or at other angles and the terminology representing relative space is to be construed accordingly.
Although the terms first, second, etc. may be used herein to connote various elements in some instances, the elements should not be limited by the terms. These terms are only used to distinguish one element from another element. For example, a first interface, a second interface, etc. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.
Although not differently defined, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The term addition defined in the commonly used dictionary is interpreted as having a meaning conforming to the contents of the related art document and the current hint, so long as no definition is made, it is not interpreted as an ideal or very formulaic meaning too much.
The invention provides a compressor suction structure and a compressor, aiming at the problems in the prior art, wherein the compressor suction structure comprises a suction channel penetrating through the inner peripheral surface and the outer peripheral surface of a compressor cylinder and a suction connecting pipe connected with the suction channel; a labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe. According to the air suction structure of the compressor, the labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe, so that refrigerant leakage between the air suction channel and the air inlet connecting pipe can be effectively reduced; meanwhile, the contact thermal resistance between the air suction channel and the air inlet connecting pipe is increased, so that the heating of the air suction channel to the refrigerant is reduced, the air suction overheat generated by the heating is avoided, and the performance of the compressor is improved.
The compressor suction structure and the compressor of the present invention will be further described with reference to the accompanying drawings and specific embodiments, and it is to be understood that the specific embodiments are not to be construed as limiting the scope of the present invention.
FIG. 1 is a schematic view showing a structure of a compressor according to an embodiment of the present invention; the compressor includes the compressor body and with the reservoir 2 of compressor body coupling, the reservoir 2 that the compressor body was connected through inlet connection pipe 21, the compressor body includes:
a housing 11;
the motor, the upper cylinder cover 12, the lower cylinder cover 13 and the cylinder 14 are accommodated in the shell 11; the upper cylinder cover 12 and the lower cylinder cover 13 are respectively arranged on the upper end surface and the lower end surface of the cylinder 14 to form a compression space for compressing the refrigerant; the housing 11 of the compressor body is also provided with a crankshaft, the upper part of the eccentric part of the crankshaft is generally positioned at the central axis of the housing through a supporting component, and the eccentric part of the crankshaft is penetrated in the cylinder 14. A piston is provided in a compression space formed by the upper cylinder head 12, the lower cylinder head 13 and the cylinder 14, and is sleeved outside an eccentric portion of the crankshaft to rotate synchronously with the crankshaft so as to compress a refrigerant.
The compressor of fig. 1 includes the compressor suction structure of the present invention, and fig. 2 is an enlarged view of a circular dotted line frame of fig. 1, specifically, the compressor suction structure includes a suction passage penetrating the inner and outer circumferential surfaces of the compressor cylinder 14 and a suction connection pipe 21 connected to the suction passage;
when the compressor is in operation, refrigerant gas enters the cylinder from the liquid storage device 2 through the air inlet connecting pipe 21, namely, the refrigerant gas sucked by the air inlet connecting pipe at the end face (the low-pressure end 100) in the air suction channel is low-pressure gas, and after the gas is compressed, high-temperature and high-pressure gas (such as gas at 200) can leak into the cylinder through a leakage channel between the inner wall 141 of the air suction channel and the outer wall of the air inlet connecting pipe 21. In the present invention, the inner wall 141 of the air suction channel is hermetically connected with the outer wall of the air inlet connecting pipe 21; and the sealing connection is labyrinth sealing connection.
Further, the labyrinth seal structure may include a labyrinth groove and a seal; in a specific embodiment, the inner wall of the air suction channel may be provided with the labyrinth groove; the outer wall of the air inlet connecting pipe is a cylindrical sealing piece; the inner wall 141 of the suction channel and the outer wall of the air inlet connecting pipe 21 can be in sealing connection with the cylindrical sealing element through interference fit.
Of course, in other embodiments, the outer wall of the intake connection pipe 21 is provided with the labyrinth groove, and the inner wall 141 of the intake passage is a cylindrical seal.
The labyrinth grooves are straight-through labyrinth grooves or staggered labyrinth grooves. In particular, the labyrinth grooves may have a spiral structure, and the labyrinth grooves may also have a plurality of discrete annular grooves.
FIG. 3 is a schematic cross-sectional view of an intake passage according to an embodiment of the present invention, wherein an outer wall of the intake connection pipe is cylindrical; correspondingly, the whole suction channel is cylindrical matched with the suction channel, the inner wall of the suction channel is provided with three discrete annular grooves 1411, and the grooves can be semicircular, semi-elliptic, a part of a circle or an arc, a triangle or a quadrilateral and other polygons. When the air suction channel is connected with the air inlet connecting pipe 21, three annular grooves 1411 included in the labyrinth grooves on the inner wall 141 of the air suction channel and the outer wall of the air inlet connecting pipe 21 form three annular cavity structures, the labyrinth grooves can be semicircular, arc-shaped or polygonal in cross section, and accordingly, the cavity structures are semicircular, arc-shaped or polygonal in cross section. At this time, when the high-pressure gas (e.g. from 200) flows to the low-pressure end 100, the pressure is reduced once when the gas passes through one cavity structure, accordingly, the pressure of the gas is lower and lower, the specific volume is larger and larger, the gas flow speed is higher and higher, and finally the pressure approaches to the back pressure, but the temperature remains unchanged, so as to achieve the sealing purpose, that is, the plurality of cavity structures arranged between the inner wall 141 of the suction channel and the outer wall of the air inlet connecting pipe 21 can effectively reduce the leakage of the refrigerant between the suction channel and the air inlet connecting pipe. The staggered labyrinth grooves can play a role in reducing the pressure of high-pressure gas in a level manner compared with the straight-through labyrinth grooves.
Of course, in other embodiments, the labyrinth seal structure may be implemented, for example, by the inner wall 141 of the suction channel being cylindrical; the outer wall of the intake connection pipe 21 is provided with a labyrinth groove constituted by a plurality of discrete annular grooves.
The labyrinth seal structure is arranged between the inner wall 141 of the air suction channel and the outer wall of the air inlet connecting pipe 21, and the plurality of cavity structures formed between the inner wall 141 of the air suction channel and the outer wall of the air inlet connecting pipe 21 through the labyrinth seal structure can effectively increase the contact thermal resistance between the wall surface of the air suction channel and the air inlet connecting pipe, and reduce the heat exchange coefficient between the wall surfaces, so that the heating of the wall surface of the air suction channel to the refrigerant is reduced, and the performance of the compressor is improved.
The labyrinth seal structure of the present invention can perform a good pressure relief function in the process of leaking high-pressure gas into the cylinder through the leakage passage between the inner wall 141 of the suction passage and the outer wall of the intake connecting pipe 21, and can also perform a function of increasing the contact thermal resistance between the wall surface of the suction passage and the intake connecting pipe, so that the number and structure of the cavity structures formed in the labyrinth seal structure can be determined according to the model of the compressor, particularly the structures of the suction passage and the intake connecting pipe 21. The distance between one end of the labyrinth groove far away from the compressor shell and the end face of the air inlet connecting pipe in the air suction channel is L1, the distance between one end of the labyrinth groove close to the compressor shell and one end of the air suction channel close to the compressor shell is L2, preferably, L1 is less than or equal to 10mm, and L2 is more than 0. The labyrinth groove can be arranged in the range of the contact surface of the air suction channel and the air inlet connecting pipe. The axial width of the labyrinth groove along the extending direction of the air suction channel is d, and the following conditions are satisfied: d is less than or equal to 10mm. The "axial width" herein refers to the distance between the farthest two points on the cross section of the labyrinth groove, for example, when the labyrinth groove is formed of a semicircular annular groove, the axial width d of the labyrinth groove is the diameter of the groove at the inner wall 141 of the suction channel; when the labyrinth groove is formed of a quadrangular annular groove, the axial width d of the labyrinth groove, i.e., the width of the groove at the inner wall 141 of the suction passage. The depth of the labyrinth groove along the direction perpendicular to the extending direction of the air suction channel is h, and h is more than 0, so that the effects of sealing and reducing heat exchange between the air suction hole and the wall surface of the air suction connecting pipe are achieved. The plurality of hollow structures formed by the sealing structure between the inner wall 141 of the intake passage and the outer wall of the intake connecting pipe 21 may be different from each other, such as the axial width d of the plurality of hollow structures in the direction along the outer circumferential surface to the inner circumferential surface of the cylinder becoming smaller and smaller, etc.
The labyrinth grooves may be semicircular, arcuate or polygonal in cross section as described above. As shown in fig. 4, the labyrinth grooves are trapezoidal in cross section, and preferably, the feet of the trapezium along the direction of the gas (dashed arrow) are β and θ, respectively, and satisfy β between 60 ° -90 °, θ between 50 ° -75 °. The labyrinth grooves have a depth h in a direction perpendicular to the extending direction of the air suction channel, namely, the height of the trapezoid is between 0.5 and 1mm, the width of the short side is between 0.3 and 1mm, and the distance between adjacent grooves can be between 1 and 4 mm. When the labyrinth groove is trapezoidal, the oblique side of the trapezoid and the outer wall of the air inlet connecting pipe 21 form a tooth-shaped structure (assuming that the trapezoid labyrinth groove is arranged on the inner wall 141 of the air inlet channel), and according to computational fluid dynamics (Computational Fluid Dynamics, CFD), the inclination of the tooth-shaped structure, that is, the size of the foot of the trapezoid changes the air flow velocity distribution at the tooth-shaped structure, so that the leakage amount is further reduced. Fig. 5 is a schematic cross-sectional view of an intake passage according to another embodiment of the present invention, wherein an outer wall of the intake connection pipe 21 is cylindrical; the labyrinth groove formed on the inner wall 141 of the air suction channel is a spiral groove 1411, and a cavity structure spirally surrounding the outer wall of the air suction connecting pipe 21 is formed between the spiral groove 1411 on the inner wall 141 of the air suction channel and the outer wall of the air suction connecting pipe 21. Likewise, the inner wall 141 of the suction channel is cylindrical; a similar cavity structure in a spiral structure can be obtained when the outer wall of the air inlet connection pipe 21 is provided with a spiral groove. The at least labyrinth groove of the present invention is not limited to the above-listed structure.
In the embodiments of fig. 3 and 5, the suction channel is rectilinear, i.e. its diameter in the direction of extension is uniform, in other embodiments the suction channel may be stepped, i.e. its diameter in the direction of extension may be varied.
It should be noted that the compressor provided by the present invention is not limited to the single-cylinder compressor shown in fig. 1, but may be a multi-cylinder compressor, and in this case, both cylinders may be provided with the suction structure of the present invention, which is not described herein. The compressor of the invention reduces the heating of the refrigerant by the air suction channel due to the increase of the contact thermal resistance between the air suction channel and the air suction connecting pipe of the air suction mechanism, thereby having higher overall performance.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The air suction structure of the compressor is characterized by comprising an air suction channel penetrating through the inner peripheral surface and the outer peripheral surface of a compressor cylinder and an air inlet connecting pipe connected with the air suction channel;
a labyrinth sealing structure is arranged between the inner wall of the air suction channel and the outer wall of the air inlet connecting pipe.
2. The compressor suction structure of claim 1, wherein the labyrinth seal structure comprises a labyrinth groove and a seal;
the inner wall of the air suction channel is provided with the labyrinth groove, and the outer wall of the air inlet connecting pipe is a cylindrical sealing piece; or (b)
The outer wall of the air inlet connecting pipe is provided with the labyrinth groove, and the inner wall of the air suction channel is a cylindrical sealing piece.
3. The compressor suction structure of claim 2, wherein the labyrinth grooves are straight-through labyrinth grooves or staggered labyrinth grooves.
4. The compressor suction structure of claim 2, wherein the labyrinth grooves are spiral grooves.
5. The compressor suction structure of claim 2, wherein the labyrinth grooves are discrete plurality of annular grooves.
6. The compressor suction structure of claim 2, wherein the labyrinth grooves are semicircular, arc-shaped or polygonal in cross section.
7. The compressor suction structure according to claim 2, wherein a distance between an end of the labyrinth groove away from the compressor housing and an end face of the intake connection pipe in the suction passage is L1, and is satisfied: l1 is less than or equal to 10mm.
8. The compressor suction structure of claim 2, wherein a distance between an end of the labyrinth groove near the compressor housing and an end of the suction passage near the compressor housing is L2, and is satisfied: l2 > 0.
9. The compressor suction structure according to claim 2, wherein an axial width of the labyrinth groove in the suction passage extending direction is d, and satisfies: d is less than or equal to 10mm.
10. A compressor comprising a compressor suction structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005512.8A CN117662478A (en) | 2022-08-22 | 2022-08-22 | Compressor suction structure and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005512.8A CN117662478A (en) | 2022-08-22 | 2022-08-22 | Compressor suction structure and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117662478A true CN117662478A (en) | 2024-03-08 |
Family
ID=90081204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211005512.8A Pending CN117662478A (en) | 2022-08-22 | 2022-08-22 | Compressor suction structure and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117662478A (en) |
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2022
- 2022-08-22 CN CN202211005512.8A patent/CN117662478A/en active Pending
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