Air suction structure of compressor cylinder, compressor cylinder and compressor

Abstract

The air suction structure of the compressor air cylinder comprises an air inlet hole channel and an air outlet groove, an opening, in the inner wall of the compressor air cylinder, of the air outlet groove is an air outlet, and the air outlet end of the air inlet hole channel is provided with an air outlet hole section; in the axial direction of the compressor air cylinder, the projection contour of the air outlet hole section is provided with a first contour line and a second contour line. The closest intersection point of the extension line of the first contour line and the projection contour of the inner wall of the compressor cylinder is A ', the closest intersection point of the extension line of the second contour line and the projection contour of the inner wall of the compressor cylinder is B', and the projection contour of the air outlet has a point A closest to the opening of the slip sheet groove and a point B farthest from the opening of the slip sheet groove; the point B is closer to the opening of the slip sheet groove than the point B ', and the point A' is closer to the opening of the slip sheet groove than the point A, so that the wall thickness between the air suction structure and the slip sheet groove can be increased, and the strength and reliability of the compressor cylinder are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor suction, and particularly relates to a suction structure of a compressor cylinder, a compressor cylinder and a compressor. Background Art

[0002] As Figure 1 shown, the suction structure of the original mass-produced compressor cylinder includes a circular air inlet passage 1' that penetrates from the outer wall of the compressor cylinder to the inner wall of the compressor cylinder. If the circular air inlet passage 1' is opened too small, it will cause a large suction resistance of the compressor, increase power consumption, and even affect the suction volume of the compressor; if the circular air inlet passage 1' is opened too large, it will cause an increase in the suction closing angle of the compressor cylinder, thereby affecting the effective working volume of the compressor cylinder, reducing the volumetric efficiency of the compressor, and affecting the refrigerating capacity of the compressor.

[0003] As Figure 2 shown, a new type of compressor cylinder suction structure is provided in the prior art. By providing an air outlet groove 2 on the inner wall 102 of the compressor cylinder, the air inlet passage 1 communicates with the compression chamber 4 of the compressor cylinder through the air outlet groove 2. Among them, the air outlet groove 2 penetrates at least one axial end of the compressor cylinder, and the air outlet groove 2 is arranged close to the cylinder slide groove 5 of the compressor cylinder, so as to ensure sufficient suction area of the suction structure while being able to close the suction structure in advance, improve the effective working volume of the compressor cylinder, and thus improve the volumetric efficiency and energy efficiency of the compressor.

[0004] However, the wall thickness between the air outlet groove 2 and the cylinder slide groove 5 is very thin, which affects the strength of the compressor cylinder and reduces the reliability of the compressor cylinder. Therefore, this problem needs to be solved. Summary of the Utility Model

[0005] Therefore, the utility model provides a suction structure of a compressor cylinder, a compressor cylinder and a compressor, which can solve the technical problem that the wall thickness between the air outlet groove and the slide groove in the prior art is very thin, affecting the strength of the compressor cylinder and reducing the reliability of the compressor cylinder.

[0006] To solve the above problems, the utility model provides a suction structure of a compressor cylinder, including an air inlet passage provided on the outer wall of the compressor cylinder and an air outlet groove provided on the inner wall of the compressor cylinder. The air inlet passage communicates with the compression chamber of the compressor cylinder through the air outlet groove; the opening of the air outlet groove on the inner wall of the compressor cylinder is an air outlet, the air outlet groove penetrates at least one axial end of the compressor cylinder, the air outlet end of the air inlet passage has an air outlet hole section, and the inner wall of the compressor cylinder has a slide groove opening;

[0007] Along the axial direction of the compressor cylinder, the projection profile of the air outlet section has a first profile line close to the cylinder vane slot and a second profile line far from the cylinder vane slot. The closest intersection point of the extension line of the first profile line and the projection profile of the inner wall of the compressor cylinder is A', and the closest intersection point of the extension line of the second profile line and the projection profile of the inner wall of the compressor cylinder is B'. Moreover, the projection profile of the air outlet has a point A closest to the opening of the vane slot and a point B farthest from the opening of the vane slot. Among them, point B is closer to the opening of the vane slot than point B', and point A' is closer to the opening of the vane slot than point A.

[0008] In some embodiments, the distance between point A and point A' is AA', and the distance between point B and point B' is BB'. Among them, AA' ≤ BB'.

[0009] In some embodiments, the air outlet groove has a first center line that coincides with the center line of the air inlet passage, and the first center line intersects with the axis of the compressor cylinder.

[0010] In some embodiments, one side of the cylinder vane slot close to the air outlet groove has a first groove wall surface, and the distance between point A and the first groove wall surface is LA. Among them, 0.mm ≤ LA ≤.mm.

[0011] In some embodiments, the air outlet area of the air outlet is larger than the air inlet area of the air outlet section.

[0012] In some embodiments, the end of the air outlet section along the air inlet direction has a drainage section. The inner diameter of the drainage section gradually decreases in the direction away from the air outlet section. The drainage section is communicated with the air outlet groove, and the drainage section is used to guide the air flow in the air outlet section to the air outlet groove.

[0013] In some embodiments, along the axial direction of the compressor cylinder, the projection profile of the groove wall of the air outlet groove passes through the projection profile of the drainage section and extends into the projection profile of the air outlet section.

[0014] In some embodiments, the air outlet groove penetrates through the axial two ends of the compressor cylinder.

[0015] In some embodiments, the air outlet groove is an arc-shaped groove;

[0016] Or, the bottom of the air outlet groove is an arc surface. The upper part of the air outlet groove has opposite first and second groove walls, and the first and second groove walls are parallel to each other. The first groove wall is connected to one end of the arc surface and is tangent to it. The second groove wall is connected to the other end of the arc surface and is tangent to it.

[0017] The present utility model further provides a compressor cylinder or a compressor, which includes the suction structure of the compressor cylinder described in any one of the above.

[0018] The suction structure of a compressor cylinder, the compressor cylinder and the compressor provided by the present utility model have the following beneficial effects:

[0019] 1. Since point A' is closer to the opening of the sliding vane groove than point A, such a setting can increase the wall thickness between the suction structure and the sliding vane groove, thereby improving the strength of the compressor cylinder and increasing the reliability of the compressor cylinder. From another perspective, it also reduces the included angle between the intake passage of the suction structure and the sliding vane groove, so that the turning between the intake passage and the outlet groove in the suction structure is reduced, thereby reducing the flow resistance of the refrigerant in the suction structure.

[0020] 2. It is beneficial to remove burrs at the intersection of the intake passage and the outlet groove. Description of the Drawings

[0021] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. The drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.

[0022] Figure 1 is a schematic structural diagram of a compressor cylinder in the prior art;

[0023] Figure 2 is another schematic structural diagram of a compressor cylinder in the prior art;

[0024] Figure 3 is a schematic structural diagram of a compressor cylinder of the present utility model;

[0025] Figure 4 is a schematic structural diagram reflecting the outlet and the opening of the sliding vane groove;

[0026] Figure 5 is another schematic structural diagram of a compressor cylinder of the present utility model;

[0027] Figure 6 is another schematic structural diagram of a compressor cylinder of the present utility model.

[0028] The reference numerals are:

[0029] 1. Intake duct; 2. Exhaust groove; 3. Drainage section; 4. Compression chamber; 5. Cylinder sliding vane groove; 11. Exhaust hole section; 21. First groove wall; 22. Second groove wall; 23. Arc surface; 51. First groove wall surface; 52. Sliding vane groove opening; 101. Outer wall; 102. Inner wall; 201. Exhaust port; a. Center line of intake duct; b. Central plane; c. First center line. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0032] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "beneath other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, these terms have no special meanings, so they should not be construed as limiting the protection scope of the present utility model.

[0034] Referring to Figures 3 - 6 As shown, according to an embodiment of the present utility model, a suction structure of a compressor cylinder is provided, including an intake duct 1 and an outlet groove 2. Among them, the intake duct 1 is arranged on the outer wall 101 of the compressor cylinder, the outlet groove 2 is arranged on the inner wall 102 of the compressor cylinder, and the intake duct 1 communicates with the compression chamber 4 of the compressor cylinder through the outlet groove 2; the opening of the outlet groove 2 on the inner wall 102 of the compressor cylinder is an outlet 201. The outlet groove 2 penetrates at least one axial end of the compressor cylinder.

[0035] The outlet end of the above intake duct 1 has an outlet hole section 11. In a specific application example, the outlet hole section 11 can be a straight circular hole section or a frustum-shaped hole section, etc. The outlet end of the intake duct 1 communicates with the outlet groove 2 through the outlet hole section 11. There is a sliding vane slot opening 51 on the inner wall 102 of the compressor cylinder.

[0036] As Figure 3 shown, along the axial direction of the compressor cylinder, the projection profile of the outlet hole section 11 has a first profile line 111 close to the cylinder sliding vane slot 5 and a second profile line 112 far from the cylinder sliding vane slot 5, and the nearest intersection point of the extension line of the first profile line 111 and the projection profile of the inner wall 102 of the compressor cylinder is A', the nearest intersection point of the extension line of the second profile line 112 and the projection profile of the inner wall 102 of the compressor cylinder is B', and the projection profile of the outlet 201 has a point A closest to the sliding vane slot opening 52 and a point B farthest from the sliding vane slot opening 52; among them, point B is closer to the sliding vane slot opening 52 than point B', and point A' is closer to the sliding vane slot opening 52 than point A.

[0037] As Figure 3 shown, the cylinder sliding vane slot 5 of the compressor cylinder has a central plane b, the included angle between the line connecting point A and the center O of the compressor cylinder and the central plane b is α, the included angle between the line connecting point B and the center O of the compressor cylinder and the central plane b is β, the included angle between the line connecting point A' and the center O of the compressor cylinder and the central plane b is α', and the included angle between the line connecting point B' and the center O of the compressor cylinder and the central plane b is β'. Among them, because point B is closer to the sliding vane slot opening 52 than point B', and point A' is closer to the sliding vane slot opening 52 than point A, so α > α', and β < β'.

[0038] In the above example, since point B is closer to the opening 52 of the sliding vane groove than point B', the suction structure can be closed earlier compared to the prior art, thereby increasing the effective working volume of the compressor cylinder. Additionally, since the above-mentioned air outlet groove 2 at least penetrates one axial end of the compressor cylinder, even if the suction structure is closed earlier, it can ensure that the suction channel area of the suction structure is sufficient, thereby improving the volumetric efficiency and energy efficiency of the compressor.

[0039] Since point A' is closer to the opening 52 of the sliding vane groove than point A, such a setting can increase the wall thickness between the suction structure and the cylinder sliding vane groove 5, thereby improving the strength of the compressor cylinder and increasing the reliability of the compressor cylinder. On the other hand, it also equivalently reduces the angle between the intake passage 1 of the suction structure and the cylinder sliding vane groove 5, thereby reducing the turning between the intake passage 1 and the air outlet groove 2 in the suction structure, and thus reducing the flow resistance of the refrigerant in the suction structure.

[0040] In some embodiments, the aforementioned air outlet groove 2 penetrates both axial ends of the compressor cylinder, so as to further ensure that the suction channel area of the suction structure is sufficient.

[0041] For the convenience of processing, as Figure 3 shown, the cross-sectional profile of the aforementioned air outlet groove 2 remains consistent along the axial direction of the compressor cylinder. Among them, the cross-section of the air outlet groove 2 at each position along the axial direction of the compressor cylinder is perpendicular to the axis of the compressor cylinder.

[0042] In some embodiments, as Figure 3 shown, the distance between the aforementioned points A and A' is AA', and the distance between points B and B' is BB', where AA' ≤ BB'.

[0043] In the above example, when AA' < BB', generally, the wall thickness between the suction structure and the cylinder sliding vane groove 5 can be appropriately thickened, but it does not need to be too thick. The wall thickness between the suction structure and the cylinder sliding vane groove 5 can be set to be smaller. In this way, while ensuring the outlet area, the suction structure can be closed as early as possible, thereby improving the energy efficiency of the compressor.

[0044] As Figure 3 shown, when AA' = BB', such a setting can make the flow direction of the refrigerant change as little as possible when flowing from the intake passage 1 to the air outlet groove 2, thereby reducing the flow resistance.

[0045] In some embodiments, as Figure 6As shown, the aforementioned air outlet groove 2 has a first center line c that coincides with the center line a of the air inlet passage 1, which is conducive to removing burrs at the intersection of the air inlet passage 1 and the air outlet groove 2. Specifically, when removing burrs, it is only necessary to insert the brush into the air inlet passage 1. On the contrary, if the air outlet groove 2 and the air inlet passage 1 deviate significantly, due to the asymmetry of the intersection position, the acting forces on the brush in two directions are also different, which will cause the brush to swing violently. When this phenomenon is serious, burrs cannot be removed.

[0046] In some embodiments, as Figure 6 shown, the aforementioned first center line c intersects with the axis of the compressor cylinder. Such a setting can facilitate the machining and burr removal of the suction structure of the compressor cylinder. Preferably, the aforementioned first center line c is also perpendicular to the axis of the compressor cylinder.

[0047] In some embodiments, as Figure 5 shown, one side of the aforementioned cylinder slide groove 5 close to the air outlet groove 2 has a first groove wall surface 51. The distance between the aforementioned point A and the first groove wall surface 51 is LA, where 0.8 mm ≤ LA ≤ 3.5 mm.

[0048] In the above example, when LA < 0.8 mm, the cylinder slide groove 5 is prone to deformation, affecting the reliability of the compressor; when LA reaches 3.5 mm, the deformation of the cylinder slide groove 5 is very small. Continuing to increase this dimension is not conducive to the premature closing of the suction structure.

[0049] In some embodiments, the air outlet area of the aforementioned air outlet 201 is larger than the air inlet area of the air inlet hole section 11. In a specific application example, the opening width of the aforementioned air outlet 201 is AB, the height of the air outlet 201 along the axial direction of the compressor cylinder is H, and the air outlet area of the air outlet 201 is AB × H. The air inlet hole section 11 is a round hole section, and the diameter of the air inlet hole section 11 is D, where the air inlet area of the air inlet hole section 11 is π × D2 / 4. Among them, AB × H ≥ π × D2 / 4.

[0050] In the above example, since the resistance of the refrigerant flowing from the air inlet passage 1 into the air outlet groove 2 is relatively large, the air outlet area of the air outlet 201 is set to be larger than the air inlet area of the air inlet hole section 11 to avoid excessive flow resistance in this section.

[0051] In some embodiments, as Figure 5 shown, the end of the aforementioned air inlet hole section 11 along the air inlet direction has a diversion section 3. The inner diameter of the diversion section 3 gradually decreases in the direction away from the air inlet hole section 11, and the diversion section 3 is communicated with the air outlet groove 2. The diversion section 3 is used to guide the air flow in the air inlet hole section 11 to the air outlet groove 2.

[0052] In the above example, by setting the drainage section 3 with a gradually decreasing inner diameter to drain the air outlet hole section 11, on the one hand, the eddy current effect generated during the transition can be reduced; on the other hand, the direct impact of the refrigerant can be avoided, thus preventing a large amount of energy loss.

[0053] In a specific application example, as Figure 5 shown, along the axial direction of the compressor cylinder, the projected contour of the groove wall of the aforementioned air outlet groove 2 passes through the projected contour of the drainage section 3 and extends into the projected contour of the air outlet hole section 11, so that a part of the end of the air outlet hole section 11 along the intake direction is directly connected to the air outlet groove 2, thereby improving the intake efficiency.

[0054] In a specific application example, as Figure 3 shown, the aforementioned air outlet groove 2 can be an arc-shaped groove.

[0055] As Figure 6 shown, the bottom of the aforementioned air outlet groove 2 can be an arc surface 23, and the upper part of the air outlet groove 2 has opposite first groove wall 21 and second groove wall 22, and the first groove wall 21 and the second groove wall 22 are parallel to each other. The first groove wall 21 is connected to one end of the arc surface 23 and is tangent to it. The second groove wall 22 is connected to the other end of the arc surface 23 and is tangent to it.

[0056] In the above example, through the above structural settings, the flow resistance of the refrigerant inside the air outlet groove 2 can be reduced, and the smoothness of the refrigerant flow can be improved.

[0057] It should be noted here that: the intake end of the aforementioned intake passage 1 is used to communicate with an intake pipe or the like, and finally communicates with the evaporator to enable the compressor cylinder to inhale low-pressure refrigerant. The aforementioned intake passage 1 is not directly connected to the compression chamber 4 of the compressor cylinder, while the air outlet groove 2 is directly connected to the compression chamber 4 of the compressor cylinder, so that the intake passage 1 is connected to the compression chamber 4 of the compressor cylinder through the air outlet groove 2, enabling the refrigerant of the intake structure to smoothly enter the compression chamber 4 of the compressor cylinder.

[0058] Among them, the structure of the present invention can increase the wall thickness between the intake structure and the cylinder sliding vane groove 5 while ensuring a relatively small intake closing angle, thereby improving the reliability of the compressor; the structure of the present invention also reduces the flow resistance of the refrigerant in the intake structure.

[0059] The present utility model further provides a compressor cylinder or a compressor, which includes the suction structure of the compressor cylinder according to any one of the above. Among them, due to the adoption of the suction structure of the compressor cylinder in the compressor cylinder or the compressor, since point A' is closer to the opening 52 of the sliding vane groove than point A, such a setting can increase the wall thickness between the suction structure and the cylinder sliding vane groove 5, thereby improving the strength of the compressor cylinder and increasing the reliability of the compressor cylinder. From another perspective, it also equivalently reduces the angle between the intake passage 1 of the suction structure and the cylinder sliding vane groove 5, so that in the suction structure, the turning between the intake passage 1 and the outlet groove 2 is reduced, thereby reducing the flow resistance of the refrigerant in the suction structure.

[0060] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0061] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. An air intake structure for a compressor cylinder, comprising an air intake channel (1) arranged on an outer wall (101) of the compressor cylinder and an air outlet groove (2) arranged on an inner wall (102) of the compressor cylinder, wherein the air intake channel (1) is connected to a compression chamber (4) of the compressor cylinder through the air outlet groove (2); an opening of the air outlet groove (2) on the inner wall (102) of the compressor cylinder is an air outlet (201), the air outlet groove (2) at least passes through one axial end of the compressor cylinder, the air outlet end of the air intake channel (1) has an air outlet section (11), and the inner wall (102) of the compressor cylinder has a sliding vane groove opening (52); characterized in that: Along the axial direction of the compressor cylinder, the projected contour of the air outlet section (11) has a first contour line (111) close to the cylinder vane groove (5) and a second contour line (112) far from the cylinder vane groove (5), and the closest intersection point between the extended line of the first contour line (111) and the projected contour of the compressor cylinder inner wall (102) is A', and the closest intersection point between the extended line of the second contour line (112) and the projected contour of the compressor cylinder inner wall (102) is B', and the projected contour of the air outlet (201) has a point A closest to the vane groove opening (52) and a point B farthest from the vane groove opening (52); wherein point B is closer to the vane groove opening (52) than point B', and point A' is closer to the vane groove opening (52) than point A.

2. The air intake structure of the compressor cylinder according to claim 1, characterized in that: The distance between point A and point A' is AA', and the distance between point B and point B' is BB', where AA'≤BB'.

3. The air intake structure of the compressor cylinder according to claim 1, characterized in that: The air outlet groove (2) has a first center line (c) that coincides with the center line (a) of the air inlet channel, and the first center line (c) intersects with the axis of the compressor cylinder.

4. The air intake structure of the compressor cylinder according to any one of claims 1 to 3, characterized in that: The cylinder vane groove (5) has a first groove wall surface (51) on one side close to the gas outlet groove (2), and the distance between point A and the first groove wall surface (51) is LA, wherein 0.8 mm≤LA≤3.5 mm.

5. The air intake structure of the compressor cylinder according to any one of claims 1 to 3, characterized in that: The air outlet area of ​​the air outlet (201) is larger than the air inlet area of ​​the air outlet hole section (11).

6. The air intake structure of the compressor cylinder according to any one of claims 1 to 3, characterized in that: The end of the air outlet section (11) along the air inlet direction is provided with a guide section (3), the inner diameter of the guide section (3) gradually decreases in the direction away from the air outlet section (11), the guide section (3) is connected with the air outlet groove (2), and the guide section (3) is used to guide the airflow in the air outlet section (11) to the air outlet groove (2).

7. The air intake structure of the compressor cylinder according to claim 6, characterized in that: Along the axial direction of the compressor cylinder, the projection contour of the groove wall of the air outlet groove (2) passes through the projection contour of the guide section (3) and extends into the projection contour of the air outlet hole section (11).

8. The air intake structure of a compressor cylinder according to any one of claims 1 to 3 and 7, characterized in that: The air outlet groove (2) passes through the two axial ends of the compressor cylinder.

9. The air intake structure of a compressor cylinder according to any one of claims 1 to 3 and 7, characterized in that: The air outlet groove (2) is an arc-shaped groove; Alternatively, the bottom of the air outlet groove (2) is a circular arc surface (23), and the upper part of the air outlet groove (2) has a first groove wall (21) and a second groove wall (22) opposite to each other, and the first groove wall (21) and the second groove wall (22) are parallel to each other; the first groove wall (21) is connected to one end of the circular arc surface (23), and the two are tangent to each other; the second groove wall (22) is connected to the other end of the circular arc surface (23), and the two are tangent to each other.

10. A compressor cylinder or a compressor, characterized in that: An air intake structure comprising a compressor cylinder according to any one of claims 1-9.

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