Compressor pump body structure, compressor and air conditioner

Abstract

The invention provides a compressor pump body structure, a compressor and an air conditioner, the compressor pump body structure comprises an air cylinder, a first fastener and a second fastener, the air cylinder is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are staggered in the axial direction of the air cylinder; the first fastener is inserted into the first mounting hole from one axial end of the air cylinder to fasten the air cylinder, and the second fastener is inserted into the second mounting hole from the other axial end of the air cylinder to fasten the air cylinder; the partial section of the first fastener inserted into the cylinder and the partial section of the second fastener inserted into the cylinder have at least partial structural overlap. According to the invention, while the assembly reliability of the pump body is improved, the single-cylinder / double-cylinder small-cylinder-height design is realized, the energy efficiency of the compressor is greatly improved, and the problem that the small-cylinder-height compressor cannot be realized due to insufficient thread screwing length is solved.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a compressor pump body structure, a compressor and an air conditioner. Background Art

[0002] In existing rotary compressors, the cylinder height is too high, which will lead to increased leakage in the gap between the roller and the cylinder wall, and between the vane head and the outer circle of the roller. At the same time, the increase in the cylinder wall area will also lead to increased heat transfer in the compressor pump body, affecting the energy efficiency of the compressor.

[0003] For small-displacement twin-cylinder compressors, the cylinder height cannot be too low due to existing technology limitations, resulting in the sum of the total cylinder heights of the two cylinders being much greater than that of a single-cylinder compressor of the same displacement. As a result, gap leakage and heat transfer in the compressor have a significant impact on the energy efficiency of the compressor, limiting the development and promotion of small-displacement compressors.

[0004] The present invention solves one of the core bottlenecks in the development of small-displacement twin-cylinder compressors: the small cylinder has an insufficient locking distance of high screws and there is an assembly reliability problem.

[0005] Since the compressor in the prior art has insufficient screw locking distance, resulting in sealing problems and inability to achieve small cylinder height design and other technical problems, the present invention studies and designs a compressor pump body structure, a compressor and an air conditioner. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the screw locking distance of the compressor in the prior art is insufficient, resulting in the inability to achieve a small cylinder height design, thereby providing a compressor pump body structure, a compressor and an air conditioner.

[0007] In order to solve the above problems, the present invention provides a compressor pump body structure, which includes:

[0008] A cylinder, a first fastener and a second fastener, wherein the cylinder is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are staggered in the axial direction of the cylinder, the first fastener is inserted into the first mounting hole from one axial end of the cylinder to fasten the cylinder, and the second fastener is inserted into the second mounting hole from the other axial end of the cylinder to fasten the cylinder, and within a longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder, a partial section of the first fastener inserted into the cylinder and a partial section of the second fastener inserted into the cylinder have at least partial structural overlap.

[0009] In some embodiments,

[0010] In the axial direction of the cylinder, the fastening fit length between the first fastener and the cylinder is L1, the axial height of the cylinder is H, and L1≥0.67H is satisfied, and the fastening fit length between the second fastener and the cylinder is L2, and L2≥0.67H is satisfied.

[0011] In some embodiments,

[0012] The axial height of the cylinder is H, and satisfies H≤11.5 mm.

[0013] In some embodiments,

[0014] The first fastener and the second fastener are both screws or bolts, and the first mounting hole and the second mounting hole are both threaded holes; and / or, the aperture of the first mounting hole is D1, the aperture of the second mounting hole is D2, and the center hole distance L between the two satisfies: 1.5mm≤L-0.5(D1+D2)≤10mm.

[0015] In some embodiments,

[0016] In the axial projection plane of the cylinder, the first mounting hole and the second mounting hole are staggered in the circumferential direction of the cylinder, and the first mounting hole has a center A, the second mounting hole has a center B, the cylinder has a center O, and the length of OA is equal to the length of OB.

[0017] In some embodiments,

[0018] There are a plurality of first mounting holes, which are arranged at intervals along the circumference of the cylinder; there are a plurality of second mounting holes, which are arranged at intervals along the circumference of the cylinder, and the first mounting holes and the second mounting holes are arranged in a one-to-one correspondence to form a group of mounting hole units;

[0019] In two adjacent groups of mounting hole units, a first angle is formed between a line connecting the center of a first mounting hole and the cylinder center O and a line connecting the center of another first mounting hole and the cylinder center O, and a second angle is formed between a line connecting the center of a second mounting hole and the cylinder center O and a line connecting the center of another second mounting hole and the cylinder center O, and the first angle is equal to the second angle;

[0020] In the same group of mounting hole units, a line connecting the center of the first mounting hole and the cylinder center O and a line connecting the center of the second mounting hole and the cylinder center O form a third angle, and the third angles between multiple groups of mounting hole units are equal.

[0021] In some embodiments,

[0022] The cylinder is one, forming a single-cylinder compressor, and further comprises a first flange and a second flange, wherein the first flange is located at one axial end of the cylinder, and the second flange is located at the other axial end of the cylinder;

[0023] The first fastener passes through both axial end surfaces of the first flange and is inserted into the first mounting hole of the cylinder and is spaced apart from the second flange; the second fastener passes through both axial end surfaces of the second flange and is inserted into the second mounting hole of the cylinder and is spaced apart from the first flange; in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder, a partial section of the first fastener inserted into the first mounting hole and a partial section of the second fastener inserted into the second mounting hole have at least partial structural overlap; or,

[0024] The first fastener passes through both axial end surfaces of the first flange and is inserted into the first mounting hole of the cylinder and is spaced apart from the second flange. The second fastener passes through both axial end surfaces of the second flange and is inserted into and passes through the second mounting hole of the cylinder, and then is inserted into the first flange and is spaced apart from the axial end surface of the first flange. In the longitudinal projection plane and in the direction perpendicular to the axial direction of the cylinder, there is at least partial structural overlap between the partial section of the first fastener inserted into the first mounting hole and the partial section of the second fastener inserted into the second mounting hole.

[0025] In some embodiments,

[0026] The cylinder is one, forming a single-cylinder compressor, and further comprises a first flange and a second flange, wherein the first flange is located at one axial end of the cylinder, and the second flange is located at the other axial end of the cylinder;

[0027] The first fastener penetrates through both axial end surfaces of the first flange and then is inserted into and penetrates through the first mounting hole of the cylinder, and then is inserted into the second flange and is spaced apart from the axial end surface of the second flange; the second fastener penetrates through both axial end surfaces of the second flange and then is inserted into the second mounting hole of the cylinder and is spaced apart from the first flange, and in the longitudinal projection plane and in the direction perpendicular to the axial direction of the cylinder, there is at least a partial structural overlap between the partial section of the first fastener inserted into the first mounting hole and the partial section of the second fastener inserted into the second mounting hole; or,

[0028] The first fastener penetrates through both axial end surfaces of the first flange and is then inserted into and penetrates the first mounting hole of the cylinder, and then is inserted into the second flange and is spaced apart from the axial end surface of the second flange. The second fastener penetrates through both axial end surfaces of the second flange and is then inserted into and penetrates the second mounting hole of the cylinder, and then is inserted into the first flange and is spaced apart from the axial end surface of the first flange. In the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder, there is at least partial structural overlap between a partial section of the first fastener inserted into the first mounting hole and a partial section of the second fastener inserted into the second mounting hole.

[0029] In some embodiments,

[0030] There are two cylinders to form a dual-cylinder compressor, including a first cylinder and a second cylinder. The compressor pump body structure also includes a first flange, a second flange and a partition. The first flange is located at one axial end of the first cylinder, and the second flange is located at the other axial end of the second cylinder. The first cylinder and the second cylinder are connected through the partition. The first cylinder is provided with the first mounting hole and the second mounting hole offset. In the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder, there is at least partial structural overlap between the partial section of the first fastener inserted into the first mounting hole and the partial section of the second fastener inserted into the second mounting hole.

[0031] In some embodiments,

[0032] The first fastener passes through both axial end surfaces of the first flange and is inserted into the first cylinder and is spaced apart from the partition. The second fastener passes through both axial end surfaces of the second flange and is inserted into and passes through the second cylinder and the partition, and then is inserted into the first cylinder and is spaced apart from the first flange. In the longitudinal projection plane of the first cylinder and in a direction perpendicular to the axial direction of the first cylinder, the first fastener and the second fastener form at least a partial structural overlap.

[0033] In some embodiments,

[0034] It also includes an assembly fastener, which passes through the second flange and is connected to the second cylinder, and the assembly fastener has a minimum distance greater than 0 with the partition; the assembly sequence is: firstly fasten the first flange and the first cylinder as a whole through the first fastener, then fasten the second flange and the second cylinder as a whole through the assembly fastener, and then fasten the second flange, the second cylinder, the partition and the first cylinder through the second fastener.

[0035] In some embodiments,

[0036] It also includes an assembly fastener, which passes through the second cylinder and the partition and is connected to the first cylinder, and the assembly fastener has a minimum distance greater than 0 with the first flange; the assembly sequence is: first fasten the first flange and the first cylinder as a whole through the first fastener, then fasten the second cylinder, the partition and the first cylinder as a whole through the assembly fastener, and then fasten the second flange, the second cylinder, the partition and the first cylinder through the second fastener.

[0037] In some embodiments,

[0038] The first fastener passes through both axial end surfaces of the first flange and is inserted into the first cylinder and is spaced apart from the partition. The second fastener sequentially passes through the second flange, the second cylinder, the partition and the first cylinder and is then inserted into the first flange and is spaced apart from the axial end surface of the first flange. In the longitudinal projection plane of the first cylinder and in a direction perpendicular to the axial direction of the first cylinder, the first fastener and the second fastener form at least a partial structural overlap.

[0039] In some embodiments,

[0040] It also includes an assembly fastener, which passes through the second flange and is connected to the second cylinder, and the assembly fastener has a minimum distance greater than 0 with the partition; the assembly sequence is: firstly fasten the first flange and the first cylinder as a whole through the first fastener, then fasten the second flange and the second cylinder as a whole through the assembly fastener, and then fasten the second flange, the second cylinder, the partition, the first cylinder and the first flange through the second fastener.

[0041] In some embodiments,

[0042] The first fastener passes through both axial end surfaces of the first flange and is inserted into the first cylinder and is spaced apart from the partition. The second fastener passes through the first flange, the first cylinder and the partition in sequence and is then inserted into the second cylinder and is spaced apart from the second flange. In the longitudinal projection plane of the first cylinder and in a direction perpendicular to the axial direction of the first cylinder, the first fastener and the second fastener form at least a partial structural overlap.

[0043] In some embodiments,

[0044] It also includes an assembly fastener, which passes through the second flange and is connected to the second cylinder, and the assembly fastener has a minimum distance greater than 0 with the partition; the assembly sequence is: first fasten the first flange and the first cylinder as a whole through the first fastener, then fasten the second flange and the second cylinder as a whole through the assembly fastener, and then fasten the first flange, the first cylinder, the partition and the second cylinder through the second fastener.

[0045] The present invention also provides a compressor, which comprises the above compressor pump body structure.

[0046] The present invention also provides an air conditioner, which comprises the aforementioned compressor.

[0047] The compressor pump body structure, compressor and air conditioner provided by the present invention have the following beneficial effects:

[0048] The present invention arranges the first and second mounting holes on the cylinder in an axially staggered manner, inserts the first fastener into the first mounting hole to fasten the cylinder, and inserts the second fastener into the second mounting hole to fasten the cylinder, and in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder, there is at least partial structural overlap between the partial section of the first fastener inserted into the cylinder and the partial section of the second fastener inserted into the cylinder, which can effectively increase the locking distance of the fastener on the cylinder in the axial direction, especially increase the thread engagement length of the threaded fastener on the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder, and can effectively realize the design of small cylinder height, reduce the height of the cylinder, make the structure more compact, meet the needs of small volume compressors, and realize single-cylinder / double-cylinder small cylinder height design while improving the assembly reliability of the pump body, greatly improve the energy efficiency of the compressor, effectively solve the problem that small cylinder height compressors cannot be realized due to insufficient thread engagement length, and solve the problem that small-displacement double-cylinder compressors cannot select a more suitable cylinder height, resulting in poor energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a longitudinal cross-sectional view of a compressor pump body structure in the prior art;

[0050] Figure 2 yes Figure 1 AA section view;

[0051] Figure 3 yes Figure 2 CC section view;

[0052] Figure 4 It is a top view of the first embodiment of the cylinder (single cylinder) in the compressor pump body structure of the present invention;

[0053] Figure 5 yes Figure 4 DD cross-sectional view;

[0054] Figure 6 It is a top view of the second embodiment of the cylinder (single cylinder) in the compressor pump body structure of the present invention;

[0055] Figure 7 yes Figure 6 EE cross-sectional view in;

[0056] Figure 8 It is a front cross-sectional view of a first embodiment of a cylinder (dual cylinder) in a compressor pump body structure of the present invention;

[0057] Fig. 9 yes Figure 8 Assembly structure drawing;

[0058] Fig.10 It is a front cross-sectional view of a second embodiment of a cylinder (dual cylinder) in a compressor pump body structure of the present invention;

[0059] Fig.11 yes Fig.10 Assembly structure drawing;

[0060] Fig.12 It is a front cross-sectional view of a third embodiment of a cylinder (dual cylinder) in a compressor pump body structure of the present invention;

[0061] Fig.13 yes Fig.12 Assembly structure drawing;

[0062] Fig.14 It is a front cross-sectional view of a fourth embodiment of a cylinder (dual cylinder) in a compressor pump body structure of the present invention;

[0063] Fig.15 yes Fig.14 Assembly structure drawing;

[0064] Fig.16 It is a top view of the structure of the cylinder replacement embodiment in the compressor pump body structure of the present invention.

[0065] The reference numerals are as follows:

[0066] 1. Cylinder; 11. First cylinder; 12. Second cylinder; 2. First fastener; 3. Second fastener; 4. First mounting hole; 5. Second mounting hole; 6. First flange; 7. Second flange; 8. Partition; 9. Assembly fastener. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0069] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0070] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0071] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings 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 "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0072] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0073] like Figure 4-16 As shown, the present invention provides a compressor pump body structure, which includes:

[0074] A cylinder 1, a first fastener 2 and a second fastener 3, wherein the cylinder 1 is provided with a first mounting hole 4 and a second mounting hole 5, wherein the first mounting hole 4 and the second mounting hole 5 are staggered in the axial direction of the cylinder 1 (such as Figure 5 As shown, that is, the two mounting holes are not opposite in the axial direction), the first fastener 2 is inserted into the first mounting hole 4 from one axial end of the cylinder 1 to fasten the cylinder 1, and the second fastener 3 is inserted into the second mounting hole 5 from the other axial end of the cylinder 1 to fasten the cylinder 1, in the longitudinal projection plane and in the direction perpendicular to the axial direction of the cylinder 1 (that is, as shown in FIG. Figure 5 The first fastener 2 is inserted into the cylinder 1, and the second fastener 3 is inserted into the cylinder 1. There is at least a partial structural overlap (such as the horizontal direction or the left-right direction in the diagram shown). Figure 5 As shown, two fasteners partially overlap in the horizontal direction or the left-right direction).

[0075] The present invention arranges the first and second mounting holes on the cylinder in an axially staggered manner, inserts the first fastener into the first mounting hole to fasten the cylinder, and inserts the second fastener into the second mounting hole to fasten the cylinder, and in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder, there is at least partial structural overlap between the partial section of the first fastener inserted into the cylinder and the partial section of the second fastener inserted into the cylinder, which can effectively increase the locking distance of the fastener on the cylinder in the axial direction, especially increase the thread engagement length of the threaded fastener on the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder, and can effectively realize the design of small cylinder height, reduce the height of the cylinder, make the structure more compact, meet the needs of small volume compressors, and realize single-cylinder / double-cylinder small cylinder height design while improving the assembly reliability of the pump body, greatly improve the energy efficiency of the compressor, effectively solve the problem that small cylinder height compressors cannot be realized due to insufficient thread engagement length, and solve the problem that small-displacement double-cylinder compressors cannot select a more suitable cylinder height, resulting in poor energy efficiency.

[0076] The adoption of the present invention not only solves the problem that the energy efficiency of the original twin-cylinder compressor is worse than that of the single-cylinder, but also gives full play to the advantages of the twin-cylinder technology, and realizes that the energy efficiency of the twin-cylinder compressor exceeds that of the single-cylinder. Combined with the advantages of the twin-cylinder compressor such as low vibration, high frequency and stable operation, the product has obvious advantages.

[0077] like Figure 1 As shown in the figure, the pump assembly structure of the existing compressor is provided with a threaded hole on the cylinder, the upper flange is connected to the cylinder by screws, and the lower flange is also connected to the cylinder by screws. The screws of the upper flange and the lower flange are locked in the same screw hole. In addition, the screw hole on the cylinder is provided with a chamfer (such as Figure 1 ), the screws are also chamfered, and the upper and lower screws need to maintain a certain gap after tightening (such as Figure 1 ) to avoid interference between the upper and lower screws due to tolerance of parts. Therefore, the thread locking distance of the screw is generally less than half of the cylinder height. When the cylinder height is reduced, the problem of insufficient thread locking distance occurs, which limits the design of small cylinder height compressors.

[0078] like Figure 2 As shown, the present invention preferably provides a rotary compressor, wherein at least one cylinder is provided with an upper fastener (preferably a screw) at the upper end and a lower fastener (preferably a screw) at the lower end, and the upper fastener and the lower fastener are staggered. The staggered overlapping portion can make full use of the solid portion in the height direction of the cylinder, increase the screwing length between the screw and the threaded hole, and thus enhance the reliability of the compressor, that is, after the staggered setting, the thread locking distance can make full use of the entire cylinder height. Figure 3 CC View and Figure 5In the middle DD view, it can be clearly seen that the screw contraction distance has been greatly increased.

[0079] In some embodiments,

[0080] In the axial direction of the cylinder 1, the fastening length between the first fastener 2 and the cylinder 1 is L1 (as Figure 5 As shown), the axial height of the cylinder 1 is H, and satisfies L1≥0.67H, and the fastening length of the second fastener 3 and the cylinder 1 is L2 (as shown Figure 5 As shown), and satisfy L2≥0.67H.

[0081] The present invention further provides that the fastening fit length between the first fastener 2 and the cylinder 1 is L1, the axial height of the cylinder 1 is H, and L1≥0.67H is satisfied, and the fastening fit length between the second fastener 3 and the cylinder 1 is L2, and L2≥0.67H is satisfied. This can further effectively increase the locking distance of the fastener to the cylinder in the axial direction, ensure the assembly reliability of the cylinder, improve the assembly sealing of the cylinder, effectively realize the design of small cylinder height, reduce the height of the cylinder, make the structure more compact, and meet the needs of small-volume compressors.

[0082] In some embodiments,

[0083] The axial height of the cylinder 1 is H, and satisfies H≤11.5 mm.

[0084] When the cylinder height is ≤11.5, if the solution of the present invention is not adopted, the thread engagement length can only be less than 5.5mm. At this time, the thread engagement reliability is poor. By adopting the present technical solution, the thread engagement length can be increased exponentially, greatly improving the thread engagement reliability.

[0085] The present invention can increase the locking distance of the fastener on the cylinder and the threaded engagement length of the threaded member on the cylinder through the above-mentioned staggered mounting holes and the partially overlapping fasteners in the horizontal direction, thereby achieving a design of a small cylinder and a high cylinder, that is, achieving a structural effect of an axial height of the cylinder H≤11.5mm.

[0086] In some embodiments,

[0087] The first fastener 2 and the second fastener 3 are both screws or bolts, and the first mounting hole 4 and the second mounting hole 5 are both threaded holes; and / or, the aperture of the first mounting hole 4 is D1, the aperture of the second mounting hole 5 is D2, and the center hole distance L between the two satisfies: 1.5mm≤L-0.5(D1+D2)≤10mm.

[0088] The present invention preferably includes an upper threaded hole and a lower threaded hole in the threaded hole group, the upper threaded hole and the lower threaded hole have apertures D1 and D2 respectively, and the center hole distance L between the two satisfies: 1.5mm≤L-0.5(D1+D2)≤10mm. Since there is a misaligned overlapping part in the height direction, a safety distance needs to be ensured between the two threaded holes in the overlapping part. When the safety distance is less than 1.5mm, part quality problems are likely to occur. When the distance is greater than 10mm, a large amount of distance size is wasted. Therefore, it is possible to simultaneously ensure part quality and improve the utilization of the cylinder structure, as marked as Figure 6 EE section view.

[0089] In some embodiments,

[0090] In the axial projection plane of the cylinder 1, the first mounting hole 4 and the second mounting hole 5 are staggered in the circumferential direction of the cylinder 1 (eg Figure 6 As shown, that is, the first and second mounting holes are offset in the circumferential direction), and the first mounting hole 4 has a center A, the second mounting hole 5 has a center B, the cylinder 1 has a center O, and the length OA is equal to the length OB.

[0091] The present invention can make the first mounting hole and the second mounting hole have the same distance from the center of the cylinder through the setting of this structure, so that the upper threaded hole and the lower threaded hole are arranged in the circumferential direction, thereby improving the uniformity of the force acting on the cylinder.

[0092] In some embodiments,

[0093] There are a plurality of first mounting holes 4, which are arranged at intervals along the circumference of the cylinder 1; there are a plurality of second mounting holes 5, which are arranged at intervals along the circumference of the cylinder 1, and the first mounting holes 4 and the second mounting holes 5 are arranged in a one-to-one correspondence to form a group of mounting hole units.

[0094] In two adjacent groups of mounting hole units, a first angle is formed between a line connecting the center of a first mounting hole 4 and the center O of the cylinder 1 and a line connecting the center of another first mounting hole 4 and the center O of the cylinder 1, and a second angle is formed between a line connecting the center of a second mounting hole 5 and the center O of the cylinder 1 and a line connecting the center of another second mounting hole 5 and the center O of the cylinder 1, and the first angle is equal to the second angle;

[0095] In the same group of mounting hole units, a line connecting the center of the first mounting hole 4 and the center O of the cylinder 1 and a line connecting the center of the second mounting hole 5 and the center O of the cylinder 1 form a third angle, and the third angles between multiple groups of mounting hole units are equal.

[0096] The present invention can improve the fastening effect on the circumferential direction of the cylinder by setting up multiple first mounting holes and multiple second mounting holes, and in two adjacent groups of mounting hole units, the first angle is equal to the second angle, and the third angle of each group is equal, which can make the distribution of multiple groups of mounting hole units on the circumferential direction of the cylinder uniform, and the angles between the two mounting holes in each group of mounting hole units are also equal, that is, the uniformity of the fastening force on the circumferential direction of the cylinder can be further improved, and the reliability and sealing of the cylinder can be improved.

[0097] like Figure 4-5 As shown, the present invention provides a rotary compressor, which has at least one cylinder, the upper end of the cylinder is provided with an upper fastener, and the lower end is provided with a lower fastener, which are connected by screws, and the screws connecting the cylinder and the upper fastener are staggered with the screws connecting the cylinder and the lower fastener. The characteristic is that on the cylinder, the holes through which the screws connected to the upper fastener pass or the threaded holes that match are marked as A1, A2, A3, ...; the holes through which the screws connected to the lower fastener pass or the threaded holes that match are marked as B1, B2, B3, ....

[0098] Its characteristics are: the position layout of A1, A2, A3,... and B1, B2, B3... are the same, with only a certain angle of misalignment.

[0099] That is: the distance between A1, A2, A3,... and the center of the cylinder is recorded as OA1, OA2, OA3...; the distance between B1, B2, B3... and the center of the cylinder is recorded as OB1, OB2, OB3...; its characteristics are: OA1, OA2, OA3... and OB1, OB2, OB3... are equal in correspondence with each other.

[0100] Moreover, the angles formed between A1, A2, A3, ... and the center of the cylinder are recorded as ∠A1OA2, ∠A2OA3, ∠A3OA4 ...; the angles formed between B1, B2, B3, ... and the center of the cylinder are recorded as ∠B1OB2, ∠B2OB3, ∠B3OB4 .... Its characteristics are that ∠A1OA2, ∠A2OA3, ∠A3OA4 ... and ∠B1OB2, ∠B2OB3, ∠B3OB4 ... are equal to each other.

[0101] for example Figure 4 In Chinese: OA1=OB1, OA2=OB2, ∠A1OA2=∠B1OB2.

[0102] The screw holes are staggered but have the same layout, so that the screw tightening and cylinder centering tools of the compressor production line can be used in common with the original resources of the production line, reducing production investment and lowering the cost of the compressor.

[0103] In some embodiments,

[0104] The cylinder 1 is one, forming a single-cylinder compressor, and further comprises a first flange 6 and a second flange 7, wherein the first flange 6 is located at one axial end of the cylinder 1, and the second flange 7 is located at the other axial end of the cylinder 1;

[0105] like Figure 4-5 , the first fastener 2 passes through both axial ends of the first flange 6 and is inserted into the first mounting hole 4 of the cylinder 1 and is spaced apart from the second flange 7; the second fastener 3 passes through both axial ends of the second flange 7 and is inserted into the second mounting hole 5 of the cylinder 1 and is spaced apart from the first flange 6; in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder 1, a partial section of the first fastener 2 inserted into the first mounting hole 4 and a partial section of the second fastener 3 inserted into the second mounting hole 5 have at least partial structural overlap; or,

[0106] like Figure 6-7 The first fastener 2 passes through both axial end surfaces of the first flange 6 and is inserted into the first mounting hole 4 of the cylinder 1 and is spaced apart from the second flange 7. The second fastener 3 passes through both axial end surfaces of the second flange 7 and is inserted into and passes through the second mounting hole 5 of the cylinder 1, and then is inserted into the first flange 6 and is spaced apart from the axial end surfaces of the first flange 6. In the longitudinal projection plane and in the direction perpendicular to the axial direction of the cylinder 1, there is at least partial structural overlap between the partial section of the first fastener 2 inserted into the first mounting hole 4 and the partial section of the second fastener 3 inserted into the second mounting hole 5.

[0107] This is the first preferred structural form and the second preferred structural form of the single-cylinder compressor of the present invention. The first preferred structural form is as follows Figure 5 As shown, the first fastener connects the upper flange and the cylinder from top to bottom, and the second fastener connects the lower flange and the cylinder from bottom to top. The second preferred structural form is as shown in Figure 7 As shown, the first fastener connects the upper flange and the cylinder from top to bottom, and the second fastener connects the lower flange, the cylinder and the upper flange from bottom to top. The first and second fasteners are staggered in the axial direction, and form a structure that at least partially overlaps in the horizontal direction. This can preferably increase the locking distance of the fastener to the cylinder in the axial direction, especially increase the threaded engagement length of the threaded fastener to the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder. It can effectively realize the design of small cylinder height, reduce the height of the cylinder, make the structure more compact, meet the needs of small-volume compressors, and realize single-cylinder / double-cylinder small cylinder height design while improving the assembly reliability of the pump body, thereby greatly improving the energy efficiency of the compressor.

[0108] The first structural form of the single-cylinder compressor of the present invention is preferably that its threaded holes are arranged on the cylinder, the upper flange is connected to the cylinder by screws, the connected threaded holes are marked as A1, A2, A3..., the lower flange is connected to the cylinder by screws, the connected threaded holes are marked as B1, B2, B3..., and its characteristic is that A1, A2, A3... do not overlap with B1, B2, B3...

[0109] like Figure 4-5 As shown, the upper flange and the cylinder are connected by screws, and a plurality of screws pass through the upper flange (or the silencer arranged on the upper flange) and are screwed and tightened with the threaded holes arranged on the cylinder; the lower flange and the cylinder are also connected by screws, and a plurality of screws pass through the lower flange (or the silencer arranged on the lower flange) and are screwed and tightened with the threaded holes arranged on the cylinder; its characteristic is that the screw holes on the cylinder that are screwed together with the upper flange do not overlap with the screw holes that are screwed together with the lower flange.

[0110] With such arrangement, the matching length between the screw and the threaded hole on the cylinder can basically reach the entire height of the cylinder.

[0111] compared to Figure 1-3 , that is, compared with the original thread matching length, the thread matching length of the new solution can be doubled. Especially for small cylinder height compressors, the assembly reliability of the compressor is greatly improved. On the other hand, it can solve the problem that the cylinder height cannot be reduced due to insufficient screw engagement length.

[0112] The second structural form of the single-cylinder compressor of the present invention is as follows: Figure 6-7 As shown, preferably, the upper flange (or lower flange) is connected to the cylinder by screws, and its threaded holes are arranged on the cylinder. The threaded holes connected on the cylinder are marked as A1, A2, A3..., and the lower flange (upper flange) is connected to the cylinder by screws, and the screws pass through the cylinder and are connected to the upper flange. The threaded holes are arranged on the upper flange, and the holes through which the screws pass on the cylinder are marked as B1, B2, B3..., which is characterized in that A1, A2, A3... do not overlap with B1, B2, B3...

[0113] In some embodiments,

[0114] The cylinder 1 is one, forming a single-cylinder compressor, and further comprises a first flange 6 and a second flange 7, wherein the first flange 6 is located at one axial end of the cylinder 1, and the second flange 7 is located at the other axial end of the cylinder 1;

[0115] The first fastener 2 penetrates through both axial ends of the first flange 6 and then is inserted into and penetrates through the first mounting hole 4 of the cylinder 1, and then is inserted into the second flange 7 and is spaced apart from the axial end faces of the second flange 7; the second fastener 3 penetrates through both axial ends of the second flange 7 and then is inserted into the second mounting hole 5 of the cylinder 1 and is spaced apart from the first flange 6; in the longitudinal projection plane and in the direction perpendicular to the axial direction of the cylinder 1, there is at least a partial structural overlap between the partial section of the first fastener 2 inserted into the first mounting hole 4 and the partial section of the second fastener 3 inserted into the second mounting hole 5; or,

[0116] The first fastener 2 penetrates through both axial end surfaces of the first flange 6 and is then inserted into and penetrates the first mounting hole 4 of the cylinder 1, and then is inserted into the second flange 7 and is spaced apart from the axial end surface of the second flange 7. The second fastener 3 penetrates through both axial end surfaces of the second flange 7 and is then inserted into and penetrates the second mounting hole 5 of the cylinder 1, and then is inserted into the first flange 6 and is spaced apart from the axial end surface of the first flange 6. In the longitudinal projection plane and in the direction perpendicular to the axial direction of the cylinder 1, there is at least partial structural overlap between the partial section of the first fastener 2 inserted into the first mounting hole 4 and the partial section of the second fastener 3 inserted into the second mounting hole 5.

[0117] This is the third preferred structural form and the fourth preferred structural form of the single-cylinder compressor of the present invention. The third preferred structural form is that the first fastener connects the upper flange, the cylinder and the lower flange from top to bottom, and the second fastener connects the lower flange and the cylinder from bottom to top. The fourth preferred structural form is that the first fastener connects the upper flange, the cylinder and the lower flange from top to bottom, and the second fastener connects the lower flange, the cylinder and the upper flange from bottom to top. The first and second fasteners are staggered in the axial direction, and form a structure that at least partially overlaps in the horizontal direction. It is possible to preferably increase the locking distance of the fastener to the cylinder in the axial direction, especially to increase the threaded engagement length of the threaded fastener to the cylinder, thereby ensuring the assembly reliability of the cylinder and improving the assembly sealing of the cylinder. It is possible to effectively realize the design of small cylinder height, reduce the height of the cylinder, make the structure more compact, meet the needs of small-volume compressors, and realize the single-cylinder / double-cylinder small cylinder height design while improving the assembly reliability of the pump body, thereby greatly improving the energy efficiency of the compressor.

[0118] In some embodiments,

[0119] There are two cylinders 1, forming a dual-cylinder compressor, including a first cylinder 11 and a second cylinder 12. The compressor pump body structure also includes a first flange 6, a second flange 7 and a partition 8. The first flange 6 is located at one axial end of the first cylinder 11, and the second flange 7 is located at the other axial end of the second cylinder 12. The first cylinder 11 and the second cylinder 12 are connected through the partition 8. The first cylinder 11 is provided with a staggered first mounting hole 4 and a second mounting hole 5. In the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder 1, there is at least a partial structural overlap between the partial section of the first fastener 2 inserted into the first mounting hole 4 and the partial section of the second fastener 3 inserted into the second mounting hole 5.

[0120] The present invention further prefers that the cylinder is a double-cylinder compressor, and the first fastener and the second fastener are inserted into the cylinder from two different axial directions of the first cylinder to achieve the fastening of the first cylinder, and the first and second fasteners are staggered in the axial direction, and form a structure that at least partially overlaps in the horizontal direction. It is possible to preferably increase the locking distance of the fastener on the cylinder in the axial direction, especially increase the threaded engagement length of the threaded fastener on the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder. It can effectively realize the design of small cylinder height, reduce the height of the cylinder, make the structure more compact, meet the needs of small-volume compressors, and realize single-cylinder / double-cylinder small cylinder height design while improving the assembly reliability of the pump body, thereby greatly improving the energy efficiency of the compressor.

[0121] In some embodiments,

[0122] like Figure 8-9 The first fastener 2 penetrates through both axial ends of the first flange 6 and is inserted into the first cylinder 11 and is spaced apart from the partition 8. The second fastener 3 penetrates through both axial ends of the second flange 7 and is inserted into and penetrates the second cylinder 12 and the partition 8, and is then inserted into the first cylinder 11 and is spaced apart from the first flange 6. In the longitudinal projection plane of the first cylinder 11 and in a direction perpendicular to the axial direction of the first cylinder 11, the first fastener 2 and the second fastener 3 form at least a partial structural overlap.

[0123] This is the first preferred structural form of the dual-cylinder structure of the present invention, that is, the first fastener connects the upper flange and the upper cylinder from top to bottom, and the second fastener connects the lower flange, the lower cylinder, the partition and the upper cylinder from bottom to top. The first and second fasteners are staggered in the axial direction, and form a structure that at least partially overlaps in the horizontal direction. It can preferably increase the locking distance of the fastener on the cylinder in the axial direction, especially increase the threaded engagement length of the threaded fastener on the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder, which can effectively realize the design of small cylinder height.

[0124] In the twin-cylinder compressor of the present invention, at least one cylinder is provided with an upper fastener at the upper end and a lower fastener at the lower end, and the upper fastener and the lower fastener are arranged in a staggered manner. Figure 8-9 As shown, one implementation method is: the upper flange and the upper cylinder are locked with screws, a threaded hole (denoted as A) [when there are multiple holes, denoted as A1, A2, A3...] is set on the upper cylinder, the lower flange and the lower cylinder are locked with screws, and then the lower flange lower cylinder assembly and the partition are connected to the upper flange upper cylinder assembly with screws by long screws.

[0125] The threaded hole B [when there are multiple holes, record them as B1, B2, B3...] that matches the screw connecting the upper and lower components is set on the upper cylinder, and its characteristic is that the threaded hole A does not overlap with the threaded hole B, that is, it is misaligned. Moreover, the screwing part between the screw and the screw hole A and the screwing part between the screw and the threaded hole B have a misaligned overlapping part in the vertical direction.

[0126] In some embodiments,

[0127] like Fig. 9 , also includes an assembly fastener 9, the assembly fastener 9 passes through the second flange 7 and is connected to the second cylinder 12, and the assembly fastener 9 and the partition 8 have a minimum distance greater than 0; the assembly sequence is: first, the first flange and the first cylinder 11 are fastened as a whole through the first fastener, and then the second flange 7 and the second cylinder 12 are fastened as a whole through the assembly fastener 9, and then the second flange 7, the second cylinder 12, the partition 8 and the first cylinder 11 are fastened through the second fastener.

[0128] This is a further preferred structural form of the twin-cylinder compressor of the present invention, that is, by assembling fasteners, the upper flange and the upper cylinder can be connected by the first fasteners respectively, and the lower flange and the lower cylinder can be connected by the assembling fasteners, and then the lower flange, the lower cylinder, the partition and the upper cylinder are connected as a whole by the second fasteners, so as to realize the first and second fasteners being staggered in the axial direction and having a partially overlapping fastening structure in the horizontal direction, thereby increasing the locking distance and realizing the design of a twin-cylinder small cylinder height.

[0129] In some embodiments,

[0130] like Figure 14-15, also includes an assembly fastener 9, which passes through the second cylinder 12 and the partition 8 and is connected to the first cylinder 11, and the assembly fastener 9 has a minimum distance greater than 0 with the first flange 6; the assembly sequence is: first, the first flange 6 and the first cylinder 11 are fastened together by the first fastener 2, and then the second cylinder 12, the partition 8 and the first cylinder 11 are fastened together by the assembly fastener 9, and then the second flange 7, the second cylinder 12, the partition 8 and the first cylinder 11 are fastened together by the second fastener 3.

[0131] This is a further preferred structural form (the second assembly structural form) of the twin-cylinder compressor of the present invention, that is, through assembly fasteners, the upper flange and the upper cylinder can be connected by the first fasteners respectively, and the upper cylinder, the partition and the lower cylinder are connected by the assembly fasteners, and then the lower flange, the lower cylinder, the partition and the upper cylinder are connected as a whole by the second fasteners, so as to realize the first and second fasteners being staggered in the axial direction and having a partially overlapping fastening structure in the horizontal direction, thereby increasing the locking distance and realizing the design of a twin-cylinder small cylinder height.

[0132] The twin-cylinder compressor of the present invention is preferably as follows Figure 14-15 As shown, another implementation is: the upper flange and the upper cylinder are locked by screws, and the threaded hole (denoted as F) is set on the upper cylinder; the lower cylinder and the partition are locked on the upper cylinder by screws, and the threaded hole is set on the upper cylinder (denoted as G); then the lower flange is locked on the assembly of the previous step by screws, and preferably, the threaded hole (denoted as H) is also set on the upper cylinder. Its characteristic is that F is staggered with G and H, that is, the three types of threaded holes do not overlap.

[0133] In some embodiments,

[0134] like Figure 10-11 The first fastener 2 passes through both axial end faces of the first flange 6 and is inserted into the first cylinder 11 and is spaced apart from the partition 8. The second fastener 3 sequentially passes through the second flange 7, the second cylinder 12, the partition 8 and the first cylinder 11 and is then inserted into the first flange 6 and is spaced apart from the axial end face of the first flange 6. In the longitudinal projection plane of the first cylinder 11 and in a direction perpendicular to the axial direction of the first cylinder 11, the first fastener 2 and the second fastener 3 form at least a partial structural overlap.

[0135] This is the second preferred structural form of the dual-cylinder structure of the present invention, that is, the first fastener connects the upper flange and the upper cylinder from top to bottom, and the second fastener connects the lower flange, the lower cylinder, the partition, the upper cylinder and the upper flange from bottom to top. The first and second fasteners are staggered in the axial direction, and form a structure that at least partially overlaps in the horizontal direction. It can preferably increase the locking distance of the fastener on the cylinder in the axial direction, especially increase the threaded screwing length of the threaded fastener on the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder, which can effectively realize the design of small cylinder height.

[0136] The threaded hole for the screws connecting the upper and lower components is preferably arranged on the upper flange, that is, the hole through which the screws connecting the upper and lower components pass through the upper cylinder is marked as C [when there are multiple holes, they are marked as C1, C2, C3...], and its characteristic is that the hole C does not overlap with the threaded hole B, such as Figure 10-11 shown.

[0137] In some embodiments,

[0138] like Fig.11 , also includes an assembly fastener 9, the assembly fastener 9 passes through the second flange 7 and is connected to the second cylinder 12, and the assembly fastener 9 has a minimum distance greater than 0 with the partition 8; the assembly sequence is: first, the first flange 6 and the first cylinder 11 are fastened as a whole through the first fastener 2, and then the second flange 7 and the second cylinder 12 are fastened as a whole through the assembly fastener 9, and then the second flange 7, the second cylinder 12, the partition 8, the first cylinder 11 and the first flange 6 are fastened through the second fastener 3.

[0139] This is a further preferred structural form of the twin-cylinder compressor of the present invention, that is, by assembling fasteners, the upper flange and the upper cylinder can be connected by the first fasteners, and the lower flange and the lower cylinder can be connected by assembling fasteners respectively, and then the lower flange, the lower cylinder, the partition, the upper cylinder and the upper flange are connected as a whole by the second fasteners, so as to realize the first and second fasteners being staggered in the axial direction and having a partially overlapping fastening structure in the horizontal direction, thereby increasing the locking distance and realizing the design of a twin-cylinder small cylinder height.

[0140] In some embodiments,

[0141] like Figure 12-13The first fastener 2 passes through both axial end surfaces of the first flange 6 and is inserted into the first cylinder 11 and is spaced apart from the partition 8. The second fastener 3 passes through the first flange 6, the first cylinder 11 and the partition 8 in sequence and is then inserted into the second cylinder 12 and is spaced apart from the second flange 7. In the longitudinal projection plane of the first cylinder 11 and in a direction perpendicular to the axial direction of the first cylinder 11, the first fastener 2 and the second fastener 3 form at least a partial structural overlap.

[0142] This is the first preferred structural form of the dual-cylinder structure of the present invention, that is, the first fastener connects the upper flange and the upper cylinder from top to bottom, and the second fastener connects the upper flange, the upper cylinder, the partition and the lower cylinder from top to bottom. The first and second fasteners are staggered in the axial direction, and form a structure that at least partially overlaps in the horizontal direction. It can preferably increase the locking distance of the fastener on the cylinder in the axial direction, especially increase the threaded engagement length of the threaded fastener on the cylinder, ensure the assembly reliability of the cylinder, and improve the assembly sealing of the cylinder, which can effectively realize the design of small cylinder height.

[0143] The double-cylinder compressor of the present invention is as follows Figure 12-13 As shown, another embodiment is that the upper flange and the upper cylinder are locked by screws, the threaded hole is set on the upper cylinder, the lower flange and the lower cylinder are locked by screws, the threaded hole (denoted as D) is set on the lower cylinder, and then the upper flange upper cylinder assembly and the partition are connected to the lower flange lower cylinder assembly by screws by long screws, and the threaded hole E that matches the screw connecting the upper and lower components is set in the lower cylinder, which is characterized in that the threaded hole D does not overlap with the threaded hole E, that is, it is misaligned. Moreover, the screwed part of the screw and the screw hole D overlaps with the screwed part of the screw and the threaded hole E in the vertical direction.

[0144] In some embodiments,

[0145] like Fig.13 , also includes an assembly fastener 9, the assembly fastener 9 passes through the second flange 7 and is connected to the second cylinder 12, and the assembly fastener 9 has a minimum distance greater than 0 with the partition 8; the assembly sequence is: firstly, the first flange 6 and the first cylinder 11 are fastened as a whole through the first fastener 2, and then the second flange 7 and the second cylinder 12 are fastened as a whole through the assembly fastener 9, and then the first flange 6, the first cylinder 11, the partition 8 and the second cylinder 12 are fastened together through the second fastener 3.

[0146] This is a further preferred structural form of the twin-cylinder compressor of the present invention, that is, by assembling fasteners, the upper flange and the upper cylinder can be connected by the first fasteners, and the lower flange and the lower cylinder can be connected by the assembling fasteners respectively, and then the upper flange, the upper cylinder, the partition and the lower cylinder are connected as a whole by the second fasteners, so as to realize the first and second fasteners being staggered in the axial direction and having a partially overlapping fastening structure in the horizontal direction, thereby increasing the locking distance and realizing the design of a twin-cylinder small cylinder height.

[0147] The present invention also provides a compressor, which comprises the above compressor pump body structure.

[0148] The compressor of the present invention may preferably be a vane scroll compressor or a swing compressor.

[0149] like Fig.16 As shown, the swing compressor has at least one cylinder, an upper fastener is arranged at the upper end of the cylinder, and a lower fastener is arranged at the lower end, and the upper fastener and the lower fastener are arranged in an offset manner.

[0150] The swing compressor, due to the special structure of its vane roller, can reduce the cylinder height as much as possible to achieve high compressor efficiency. After adopting the screw staggered design, the cylinder height can be further reduced and the compressor energy efficiency can be improved.

[0151] The compressor of the present invention can improve the reliability of pump assembly while realizing a single-cylinder / double-cylinder small-cylinder high design, thereby greatly improving the energy efficiency of the compressor. The following problems are solved:

[0152] 1. Solve the problem that small cylinder high compressor cannot be realized due to insufficient thread engagement length;

[0153] 2. Small-displacement twin-cylinder compressors cannot select a more appropriate cylinder height, resulting in poor energy efficiency.

[0154] The present invention also provides an air conditioner, which comprises the aforementioned compressor.

[0155] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressor pump body structure, characterized in that: include: A cylinder (1), a first fastener (2) and a second fastener (3), wherein the cylinder (1) is provided with a first mounting hole (4) and a second mounting hole (5), wherein the first mounting hole (4) and the second mounting hole (5) are staggered in the axial direction of the cylinder (1), wherein the first fastener (2) is inserted into the first mounting hole (4) from one axial end of the cylinder (1) to fasten the cylinder (1), and wherein the second fastener (3) is inserted into the second mounting hole (5) from the other axial end of the cylinder (1) to fasten the cylinder (1), and within a longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder (1), a partial section of the first fastener (2) inserted into the cylinder (1) and a partial section of the second fastener (3) inserted into the cylinder (1) have at least partial structural overlap.

2. The compressor pump body structure according to claim 1, characterized in that: In the axial direction of the cylinder (1), the fastening fit length between the first fastener (2) and the cylinder (1) is L1, the axial height of the cylinder (1) is H, and L1≥0.67H is satisfied; the fastening fit length between the second fastener (3) and the cylinder (1) is L2, and L2≥0.67H is satisfied.

3. The compressor pump body structure according to any one of claims 1 to 2, characterized in that: The axial height of the cylinder (1) is H, and satisfies H≤11.5 mm.

4. The compressor pump body structure according to any one of claims 1 to 3, characterized in that: The first fastener (2) and the second fastener (3) are both screws or bolts, and the first mounting hole (4) and the second mounting hole (5) are both threaded holes; and / or the hole diameter of the first mounting hole (4) is D1, the hole diameter of the second mounting hole (5) is D2, and the center hole distance L between the two satisfies: 1.5mm≤L-0.5(D1+D2)≤10mm.

5. The compressor pump body structure according to claim 1, characterized in that: In the axial projection plane of the cylinder (1), the first mounting hole (4) and the second mounting hole (5) are offset in the circumferential direction of the cylinder (1), and the first mounting hole (4) has a center A, the second mounting hole (5) has a center B, the cylinder (1) has a center O, and the length OA is equal to the length OB.

6. The compressor pump body structure according to claim 1, characterized in that: There are a plurality of first mounting holes (4), and the plurality of first mounting holes (4) are arranged at intervals along the circumference of the cylinder (1); there are a plurality of second mounting holes (5), and the plurality of second mounting holes (5) are arranged at intervals along the circumference of the cylinder (1); and the first mounting holes (4) and the second mounting holes (5) are arranged in a one-to-one correspondence to each other, forming a group of mounting hole units; In two adjacent groups of mounting hole units, a first angle is formed between a line connecting the center of a first mounting hole (4) and the center O of the cylinder (1) and a line connecting the center of another first mounting hole (4) and the center O of the cylinder (1), and a second angle is formed between a line connecting the center of a second mounting hole (5) and the center O of the cylinder (1) and a line connecting the center of another second mounting hole (5) and the center O of the cylinder (1), and the first angle is equal to the second angle; and / or, In the same group of mounting hole units, a line connecting the center of the first mounting hole (4) and the center O of the cylinder (1) and a line connecting the center of the second mounting hole (5) and the center O of the cylinder (1) form a third angle, and the third angles between multiple groups of mounting hole units are equal.

7. The compressor pump body structure according to claim 1, characterized in that: The cylinder (1) is one, forming a single-cylinder compressor, and further comprises a first flange (6) and a second flange (7), wherein the first flange (6) is located at one axial end of the cylinder (1), and the second flange (7) is located at the other axial end of the cylinder (1); The first fastener (2) passes through both axial end surfaces of the first flange (6) and is inserted into the first mounting hole (4) of the cylinder (1) and is spaced apart from the second flange (7); the second fastener (3) passes through both axial end surfaces of the second flange (7) and is inserted into the second mounting hole (5) of the cylinder (1) and is spaced apart from the first flange (6); in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder (1), a portion of the first fastener (2) inserted into the first mounting hole (4) and a portion of the second fastener (3) inserted into the second mounting hole (5) have at least partial structural overlap; or, The first fastener (2) passes through both axial end surfaces of the first flange (6) and is inserted into the first mounting hole (4) of the cylinder (1) and is spaced apart from the second flange (7); the second fastener (3) passes through both axial end surfaces of the second flange (7) and is inserted into and passes through the second mounting hole (5) of the cylinder (1), and is then inserted into the first flange (6) and is spaced apart from the axial end surfaces of the first flange (6); in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder (1), a portion of the first fastener (2) inserted into the first mounting hole (4) and a portion of the second fastener (3) inserted into the second mounting hole (5) have at least partial structural overlap.

8. The compressor pump body structure according to claim 1, characterized in that: The cylinder (1) is one, forming a single-cylinder compressor, and further comprises a first flange (6) and a second flange (7), wherein the first flange (6) is located at one axial end of the cylinder (1), and the second flange (7) is located at the other axial end of the cylinder (1); The first fastener (2) penetrates through both axial end surfaces of the first flange (6) and is then inserted into and penetrates through the first mounting hole (4) of the cylinder (1), and then is inserted into the second flange (7) and is spaced apart from the axial end surface of the second flange (7); the second fastener (3) penetrates through both axial end surfaces of the second flange (7) and is then inserted into the second mounting hole (5) of the cylinder (1) and is spaced apart from the first flange (6); in the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder (1), a portion of the first fastener (2) inserted into the first mounting hole (4) and a portion of the second fastener (3) inserted into the second mounting hole (5) have at least partial structural overlap; or, The first fastener (2) penetrates through both axial end surfaces of the first flange (6) and is then inserted into and penetrates the first mounting hole (4) of the cylinder (1), and is then inserted into the second flange (7) and is spaced apart from the axial end surface of the second flange (7). The second fastener (3) penetrates through both axial end surfaces of the second flange (7) and is then inserted into and penetrates the second mounting hole (5) of the cylinder (1), and is then inserted into the first flange (6) and is spaced apart from the axial end surface of the first flange (6). In the longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder (1), a portion of the first fastener (2) inserted into the first mounting hole (4) and a portion of the second fastener (3) inserted into the second mounting hole (5) have at least partial structural overlap.

9. The compressor pump body structure according to claim 1, characterized in that: The cylinders (1) are two in number, forming a twin-cylinder compressor, comprising a first cylinder (11) and a second cylinder (12); the compressor pump body structure further comprises a first flange (6), a second flange (7) and a partition (8); the first flange (6) is located at one axial end of the first cylinder (11), the second flange (7) is located at the other axial end of the second cylinder (12), and the first cylinder (11) and the second cylinder (12) are connected via the partition (8); the first cylinder (11) is provided with the first mounting hole (4) and the second mounting hole (5) which are offset from each other, and in a longitudinal projection plane and in a direction perpendicular to the axial direction of the cylinder (1), a partial section of the first fastener (2) inserted into the first mounting hole (4) and a partial section of the second fastener (3) inserted into the second mounting hole (5) have at least partial structural overlap.

10. The compressor pump body structure according to claim 9, characterized in that: The first fastener (2) passes through both axial end surfaces of the first flange (6) and is inserted into the first cylinder (11) and is spaced apart from the partition (8). The second fastener (3) passes through both axial end surfaces of the second flange (7) and is inserted into and passes through the second cylinder (12) and the partition (8), and is then inserted into the first cylinder (11) and is spaced apart from the first flange (6). In the longitudinal projection plane of the first cylinder (11) and in a direction perpendicular to the axial direction of the first cylinder (11), the first fastener (2) and the second fastener (3) form at least a partial structural overlap.

11. The compressor pump body structure according to claim 10, characterized in that: It also includes an assembly fastener (9), which passes through the second flange (7) and is connected to the second cylinder (12), and the assembly fastener (9) and the partition (8) have a minimum distance greater than 0; the assembly sequence is: firstly, the first flange (6) and the first cylinder (11) are fastened together by the first fastener (2), and then the second flange (7) and the second cylinder (12) are fastened together by the assembly fastener (9), and then the second flange (7), the second cylinder (12), the partition (8) and the first cylinder (11) are fastened together by the second fastener (3).

12. The compressor pump body structure according to claim 10, characterized in that: It also includes an assembly fastener (9), which passes through the second cylinder (12) and the partition (8) and is connected to the first cylinder (11), and the assembly fastener (9) has a minimum distance greater than 0 with the first flange (6); the assembly sequence is: firstly, the first flange (6) and the first cylinder (11) are fastened together as a whole by the first fastener (2), and then the second cylinder (12), the partition (8) and the first cylinder (11) are fastened together as a whole by the assembly fastener (9), and then the second flange (7), the second cylinder (12), the partition (8) and the first cylinder (11) are fastened together by the second fastener (3).

13. The compressor pump body structure according to claim 9, characterized in that: The first fastener (2) passes through both axial end faces of the first flange (6) and is inserted into the first cylinder (11) and is spaced apart from the partition (8); the second fastener (3) passes through the second flange (7), the second cylinder (12), the partition (8) and the first cylinder (11) in sequence and is then inserted into the first flange (6) and is spaced apart from the axial end faces of the first flange (6); within the longitudinal projection plane of the first cylinder (11) and in a direction perpendicular to the axial direction of the first cylinder (11), the first fastener (2) and the second fastener (3) form at least a partial structural overlap.

14. The compressor pump body structure according to claim 13, characterized in that: It also includes an assembly fastener (9), which passes through the second flange (7) and is connected to the second cylinder (12), and the assembly fastener (9) and the partition (8) have a minimum distance greater than 0; the assembly sequence is: firstly, the first flange (6) and the first cylinder (11) are fastened together by the first fastener (2), and then the second flange (7) and the second cylinder (12) are fastened together by the assembly fastener (9), and then the second flange (7), the second cylinder (12), the partition (8), the first cylinder (11) and the first flange (6) are fastened together by the second fastener (3).

15. The compressor pump body structure according to claim 9, characterized in that: The first fastener (2) passes through both axial end surfaces of the first flange (6) and is inserted into the first cylinder (11) and is spaced apart from the partition (8); the second fastener (3) passes through the first flange (6), the first cylinder (11) and the partition (8) in sequence and is then inserted into the second cylinder (12) and is spaced apart from the second flange (7); within the longitudinal projection plane of the first cylinder (11) and in a direction perpendicular to the axial direction of the first cylinder (11), the first fastener (2) and the second fastener (3) form at least a partial structural overlap.

16. The compressor pump body structure according to claim 15, characterized in that: It also includes an assembly fastener (9), which passes through the second flange (7) and is connected to the second cylinder (12), and the assembly fastener (9) and the partition (8) have a minimum distance greater than 0; the assembly sequence is: firstly, the first flange (6) and the first cylinder (11) are fastened together as a whole by the first fastener (2), and then the second flange (7) and the second cylinder (12) are fastened together as a whole by the assembly fastener (9), and then the first flange (6), the first cylinder (11), the partition (8) and the second cylinder (12) are fastened together by the second fastener (3).

17. A compressor, characterized in that: A compressor pump body structure comprising any one of claims 1-16.

18. An air conditioner, characterized in that: Comprising the compressor of claim 17.

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