CN215486591U - Cylinder and compressor - Google Patents
Cylinder and compressor Download PDFInfo
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- CN215486591U CN215486591U CN202121694809.0U CN202121694809U CN215486591U CN 215486591 U CN215486591 U CN 215486591U CN 202121694809 U CN202121694809 U CN 202121694809U CN 215486591 U CN215486591 U CN 215486591U
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- cylinder
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Abstract
The utility model provides a cylinder, wherein a heat insulation structure is arranged in the circumferential wall thickness direction of the cylinder, the cylinder comprises a first surface and a second surface which are opposite along the axial direction of the cylinder, and the first surface and the second surface are both parallel to the cross section of the cylinder; the heat insulation structure comprises one or more heat insulation grooves which are positioned between the first surface and the second surface and are in a cavity structure, or the heat insulation grooves penetrate through the first surface or/and the second surface of the cylinder along the axial direction of the cylinder. Through the heat insulation structure, the heat transfer thermal resistance is increased, the temperature distribution of the inner wall surface of the air cylinder is reconstructed, and the temperature of the inner wall surface of the air cylinder is reduced, so that the heat absorption capacity of a low-temperature refrigerant of the air suction cavity is reduced, and the volumetric efficiency is improved; meanwhile, the compression work per unit mass is reduced, the compression power consumption is reduced, and the compression efficiency is improved.
Description
Technical Field
The utility model relates to the field of compressors, in particular to a cylinder of a compressor and the compressor comprising the cylinder.
Background
In the related art, a motor and a gas compression assembly are mounted in a sealed housing of a high-backpressure rolling rotor compressor, a low-temperature and low-pressure refrigerant is sucked from a gas suction pipe, a piston is driven by the motor to compress the refrigerant, and then the high-temperature and high-pressure refrigerant is discharged to a gas discharge pipe, and meanwhile, the motor does work to generate heat to form a high-temperature and high-pressure environment in the whole compressor housing. The metal heat conductivity coefficient of the gas compression assembly of the existing compressor is high, and heat of a high-temperature area in a compressor shell continuously exchanges heat with a working cavity of the compression assembly through upper and lower bearings and a metal material of a cylinder.
The compression assembly of a conventional rolling rotor compressor is generally formed with a cylinder, upper and lower bearings to form a closed working chamber, and divided into a suction chamber (low pressure chamber) and a compression chamber (high pressure chamber) by a piston and a vane. The low-temperature and low-pressure refrigerant enters the air suction cavity of the air cylinder through the air suction channel, high-temperature heat in the shell continuously transfers heat to the low-temperature refrigerant in the air suction cavity, so that the refrigerant sucked into the air suction cavity is heated and expanded, the pressure is increased, the amount of the sucked refrigerant in the next working cycle of the same working volume is reduced, and the air suction capacity is reduced, so that the performance of the compressor is influenced. In addition, the existing compressor gradually increases the temperature and the pressure of a refrigerant in a compression cavity along with the proceeding of the compression of the refrigerant, heat cannot be transmitted out in time, the actual compression process is close to isentropic compression, the power consumption of the compressor is very high, the exhaust temperature is also very high, and the condensation load is also increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a cylinder and a compressor, and provides the cylinder with a heat insulation structure on the cylinder wall aiming at the defects in the prior art, wherein a heat insulation groove is designed from a low-pressure side to a high-pressure side, so that the heat transfer resistance is increased, the temperature distribution of the inner wall surface of the cylinder is reconstructed, and the temperature of the wall surface of the cylinder is reduced, so that the heat absorption capacity of a low-temperature refrigerant in a suction cavity is reduced, and the volumetric efficiency is improved; meanwhile, the compression work per unit mass is reduced, the compression power consumption is reduced, and the compression efficiency is improved.
The utility model provides a cylinder, which is characterized in that a heat insulation structure is arranged in the circumferential wall thickness direction of the cylinder, wherein:
the cylinder comprises a first surface and a second surface which are opposite along the axial direction of the cylinder, and the first surface and the second surface are parallel to the cross section of the cylinder;
the heat insulation structure comprises one or more heat insulation grooves which are positioned between the first surface and the second surface and are in a cavity structure, or the heat insulation grooves penetrate through the first surface or/and the second surface of the cylinder along the axial direction of the cylinder.
Optionally, the heat insulation structure extends along the circumferential direction of the cylinder wall.
Optionally, the cylinder further includes a blade groove and an air inlet through hole, the blade groove position is set as a reference angle of 0 °, the heat insulation structure starts from a position of an angle θ 1 and ends at a position of an angle θ 2, the heat insulation angle θ ∈ (θ 1, θ 2), the angle θ 1 is a maximum included angle between the air inlet through hole and the reference angle of 0 °, and the angle θ 2 satisfies the following condition:
180°≤θ2≤330°。
optionally, the heat insulation structure comprises a single-segment heat insulation groove which is continuous in the circumferential direction or/and a combination of multiple-segment heat insulation grooves which are discontinuous in the circumferential direction.
Optionally, the heat insulation structure comprises a plurality of circles of heat insulation grooves arranged at intervals in the radial direction.
Optionally, a minimum radial distance between an inner wall of the heat insulation groove closer to the cylinder inside the cylinder and an inner wall of the cylinder closer to the axis of the cylinder is B1, a thickness of the cylinder wall of the cylinder is B2, and ranges of B1 and B2 satisfy the following conditions:
0.4≤B1/B2≤0.7。
optionally, a radial distance between the heat insulation groove and the groove inner wall, which is farther away from the groove outer wall in the cylinder, is a groove width C1, and the range of C1 satisfies the following condition:
C1/B2＜0.3。
optionally, the groove width C1 of the heat insulation groove is equal or unequal in width along the circumferential direction.
The utility model comprises a compressor comprising a motor assembly comprising a stator and a rotor assembly and a compression assembly comprising a cylinder as claimed in any one of the preceding claims.
Optionally, the compression assembly further comprises an upper cylinder cover and a lower cylinder cover, and the axial projection area of the heat insulation structure is in the mounting plane area of the upper cylinder cover and the mounting plane area of the lower cylinder cover, and forms a closed cavity structure with the mounting plane area of the upper cylinder cover and the mounting plane area of the lower cylinder cover.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the thermal resistance is increased through the heat insulation groove of the compressor cylinder, the temperature distribution of the inner wall surface of the cylinder is reconstructed, and the temperature of the wall surface of the cylinder is reduced, so that the heat absorption capacity of a low-temperature refrigerant in the air suction cavity is reduced, and the volumetric efficiency is improved. Meanwhile, the compression work per unit mass is reduced, the compression power consumption is reduced, and the compression efficiency is improved. Scheme verification is carried out on a 1.5HP variable-frequency compressor, and the APF (annual operating efficiency) is improved by the heat insulation groove by more than 1%.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a cross-sectional view of a cylinder according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a cylinder according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a cylinder according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a cylinder according to an embodiment of the present invention.
Reference numerals
1 cylinder wall
11 cylinder inner wall
2 first surface
3 Heat insulation groove
4 blade groove
5 inner wall of groove
6 groove outer wall
7 air inlet through hole
Detailed Description
Hereinafter, a detailed description will be given of embodiments of the present invention. While the utility model will be described and illustrated in connection with certain specific embodiments thereof, it should be understood that the utility model is not limited to those embodiments. Rather, modifications and equivalents of the utility model are intended to be included within the scope of the claims.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and components are not shown in detail in order not to obscure the subject matter of the utility model.
The "vertical" direction herein refers to the axial direction of the cylinder, the "horizontal" plane refers to a plane parallel to the cross-section of the cylinder, and the "outward" direction refers to a direction radially outward of the cylinder.
In order to solve the above technical problem, an embodiment of the present invention provides a cylinder provided with a heat insulation structure in a circumferential wall thickness direction, wherein:
the cylinder wall 1 comprises a first surface 2 and a second surface opposite in the axial direction of the cylinder, both the first surface 2 and the second surface being parallel to the cross-section of the cylinder, the second surface not being shown in the figure;
the insulation structure comprises one or more insulation slots 3 between the first surface 2 and the second surface. The heat insulation groove 3 may penetrate the first surface 2 or/and the second surface, or may have a cavity structure. Axial here refers to the axial direction of the cylinder.
Fig. 1 is a cross-sectional view of a cylinder according to a first embodiment of the present invention. In this first embodiment, the cylinder wall 1 comprises a first surface 2 and a second surface, and an insulating groove 3. The heat insulation groove 3 is multi-section and extends along the circumferential direction of the cylinder wall 1.
The heat insulation groove 3 further comprises a groove inner wall 5, the groove inner wall 5 is a groove wall on one side of the heat insulation groove 3 closer to the cylinder, the radial minimum distance between the groove inner wall 5 and the cylinder inner wall 11 of the cylinder closer to the axis is B1, the thickness of the cylinder wall 1 is B2, and the ranges of B1 and B2 meet the following conditions:
0.4≤B1/B2≤0.7。
by reasonably setting the radial minimum distance between the inner wall 5 of the groove and the inner wall 11 of the cylinder, the heat insulation effect of the heat insulation groove 3 is improved while the strength of the cylinder wall 1 is ensured.
The heat insulation groove 3 further comprises a groove outer wall 6, the groove outer wall 6 is a groove wall of the heat insulation groove 3 which is farther away from the inner side of the cylinder, as shown in fig. 1, the radial distance between the groove inner wall 5 and the groove outer wall 6 is a groove width C1, and the range of C1 satisfies the following conditions:
C1/B2＜0.3。
the cylinder wall 1 further comprises a vane groove 4 and an air inlet through hole 7, the vane groove 4 is used as a reference angle of 0 degree, in the circumferential anticlockwise direction, the heat insulation groove 3 starts from the position of an angle theta 1 and stops at the position of an angle theta 2, and the heat insulation angle theta belongs to (theta 1 and theta 2), namely the effective action angle range of the heat insulation groove 3 on the surface of the cylinder. The air inlet through hole is used for introducing uncompressed air into the air cylinder, and an included angle is formed between the air inlet through hole and the reference angle.
In a further embodiment, the angle θ 1 is a maximum included angle between the air inlet through hole and the reference angle 0 °, and the angle θ 2 satisfies the following condition:
In another embodiment, the insulation groove 3 extends in the circumferential direction of the cylinder wall 1. Fig. 2 and 3 are schematic views of an insulation tank 3 according to a second embodiment and a third embodiment of the present invention, which are different from the first embodiment in that: the heat insulation groove 3 comprises a single-segment heat insulation groove 3 which is continuous in the circumferential direction or/and a combination of multiple-segment heat insulation grooves 3 which are discontinuous in the circumferential direction. The radial minimum distance B1 of the circumferentially continuous first ring of heat insulation slots 3 is different from the radial minimum distance B1 of the circumferentially discontinuous second ring of heat insulation slots 3, in the specific embodiment the first ring of heat insulation slots 3 is located on the side closer to the inside of the cylinder, and vice versa. The second ring of heat insulation grooves 3 is formed by arranging a plurality of sections of heat insulation grooves 3 at intervals, wherein the structure of each section can be partially different or different.
Fig. 4 is a schematic view of an insulation tank 3 according to a fourth embodiment of the present invention, which is different from the first embodiment in that, as shown in fig. 4: the groove width C1 may be equal or unequal in circumferential direction, that is, the widths of the single-stage or multi-stage heat insulation groove 3 in circumferential direction may be equal or unequal.
Embodiments of the present invention also provide a compressor comprising a motor assembly comprising a stator and a rotor assembly, and a compression assembly comprising a cylinder as defined in any one of the above. The compression assembly further comprises an upper cylinder cover and a lower cylinder cover, and the axial projection area of the heat insulation groove 3 is in the mounting plane area of the upper cylinder cover and the mounting plane area of the lower cylinder cover and forms a closed cavity structure together with the mounting planes of the upper cylinder cover and the lower cylinder cover.
In summary, compared with the prior art, the cylinder of the present invention and the compressor comprising the same have the following advantages:
the thermal resistance is increased through the cylinder heat insulation structure, the temperature distribution of the inner wall surface of the cylinder is reconstructed, and the temperature of the wall surface of the cylinder is reduced, so that the heat absorption capacity of a low-temperature refrigerant of the air suction cavity is reduced, and the volumetric efficiency is improved.
And secondly, the compression work per unit mass is reduced, the compression power consumption is reduced, and the compression efficiency is improved. Scheme verification is carried out on a 1.5HP variable-frequency compressor, and the APF (annual operating efficiency) is improved by the heat insulation groove by more than 1%.
The foregoing is a more detailed description of the utility model in connection with specific alternative embodiments, and the practice of the utility model should not be construed as limited to those descriptions. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.
Claims (10)
1. A cylinder, characterized in that the cylinder is provided with a heat insulation structure in a circumferential wall thickness direction, wherein:
the cylinder comprises a first surface and a second surface which are opposite along the axial direction of the cylinder, and the first surface and the second surface are parallel to the cross section of the cylinder;
the heat insulation structure comprises one or more heat insulation grooves which are positioned between the first surface and the second surface and are in a cavity structure, or the heat insulation grooves penetrate through the first surface or/and the second surface of the cylinder along the axial direction of the cylinder.
2. The cylinder of claim 1, wherein the thermal insulation structure extends circumferentially of the cylinder wall.
3. The cylinder of claim 1, further comprising a vane slot and an air inlet through hole, wherein the vane slot is set as a reference angle of 0 °, the heat insulation structure starts from a position of an angle θ 1 and ends at a position of an angle θ 2, and a heat insulation angle θ e (θ 1, θ 2), wherein the angle θ 1 is a maximum included angle between the air inlet through hole and the reference angle of 0 °, and the angle θ 2 satisfies the following condition:
180°≤θ2≤330°。
4. the cylinder of claim 2, wherein the insulation structure comprises a single-segment insulation groove that is circumferentially continuous or/and a combination of multiple-segment insulation grooves that are circumferentially discontinuous.
5. The cylinder of claim 4, wherein the thermal shield structure comprises a plurality of radially spaced rings of thermal shield slots.
6. The cylinder of claim 1, wherein the minimum radial distance between the inner wall of the heat shield groove closer to the cylinder bore and the inner wall of the cylinder closer to the axial center is B1, the thickness of the cylinder wall is B2, and the ranges of B1 and B2 satisfy the following condition:
0.4≤B1/B2≤0.7。
7. the cylinder of claim 6, wherein a radial distance between the insulation groove further from the groove outer wall and the groove inner wall within the cylinder is a groove width C1, the range of C1 satisfying the following condition:
C1/B2＜0.3。
8. the cylinder according to claim 7, wherein the groove width C1 of the heat insulation groove is equal or unequal in width in a circumferential direction.
9. A compressor comprising a motor assembly including a stator and a rotor assembly and a compression assembly comprising a cylinder as claimed in any one of claims 1 to 8.
10. The compressor of claim 9, wherein the compression assembly further comprises an upper cylinder cover and a lower cylinder cover, and the axial projection area of the heat insulation structure is in the area of the installation plane of the upper cylinder cover and the lower cylinder cover and forms a closed cavity structure with the installation plane of the upper cylinder cover and the lower cylinder cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121694809.0U CN215486591U (en) | 2021-07-23 | 2021-07-23 | Cylinder and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121694809.0U CN215486591U (en) | 2021-07-23 | 2021-07-23 | Cylinder and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215486591U true CN215486591U (en) | 2022-01-11 |
Family
ID=79751589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121694809.0U Active CN215486591U (en) | 2021-07-23 | 2021-07-23 | Cylinder and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215486591U (en) |
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2021
- 2021-07-23 CN CN202121694809.0U patent/CN215486591U/en active Active
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