Compressor double-cylinder structure, pump body assembly and compressor

Abstract

The invention provides a compressor double-cylinder structure, a pump body assembly and a compressor, the compressor double-cylinder structure comprises a first air cylinder part and a second air cylinder part which are sequentially arranged in the axial direction, the first air cylinder part is provided with a first compression cavity, and the second air cylinder part is provided with a second compression cavity; the compressor double-cylinder structure is provided with an air suction groove penetrating through the two axial ends, and the air suction groove is provided with a first groove section located on the inner wall of the first compression cavity and a second groove section located on the inner wall of the second compression cavity. Air suction holes communicated with the air suction grooves are further formed in the peripheral wall of the double-cylinder structure of the compressor, and the first groove section and the second groove section suck air through the air suction holes. According to the technical scheme, due to the fact that the air suction grooves penetrate through the two axial ends of the compressor double-cylinder structure, cutting can be directly conducted in the axial direction of the compressor double-cylinder structure during machining, machining can be completed at a time, segmented machining is not needed, machining is more convenient, and the machining efficiency is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a compressor double-cylinder structure, a pump body assembly and a compressor. Background Art

[0002] Rotary twin-cylinder compressors usually need to have two suction pipes. The distance between the two suction pipes is short, welding is prone to failure, the failure rate is high, the number of processed parts is large, the processing technology is cumbersome, and the processing time is long, which makes the manufacturing and installation process complicated and increases the manufacturing cost. Therefore, the single suction structure technology was proposed, but with the development of the single suction structure technology, it was found that the single suction structure is less energy-efficient than the double suction structure. This is mainly due to the reduction of the suction cross-sectional area, the increase of the suction resistance, and the insufficient suction, which leads to a decrease in the cooling capacity, thereby reducing the compressor energy efficiency.

[0003] Figure 1 A cross-sectional view of a conventional double-cylinder single-intake pump body assembly is shown. The double-cylinder structure of the pump body assembly comprises an upper cylinder 5, a partition 6 and a lower cylinder 8. The upper cylinder 5 is provided with a horizontal upper cylinder intake channel 26, the partition 6 is provided with an inclined partition channel 27 connected to the upper cylinder intake channel 26, and the lower cylinder 8 is provided with an inclined lower cylinder channel 28 connected to the inclined partition channel 27. The refrigerant enters the compressor pump body from the intake port of the upper cylinder intake channel 26, and the gas is diverted in the upper cylinder intake channel 26, with one part directly entering the upper cylinder 5 and the other part flowing through the inclined partition channel 27 and the inclined lower cylinder channel 28 into the lower cylinder 8. The inclined partition channel 27 and the inclined lower cylinder channel 28 are both designed with inclined holes, which are inconvenient to process and have low processing efficiency. Summary of the invention

[0004] Therefore, the present invention provides a compressor dual-cylinder structure, a pump body assembly and a compressor, which can solve the technical problems in the prior art of inconvenient processing and low processing efficiency due to the inclined hole design of the inclined partition channel and the inclined lower cylinder channel.

[0005] In order to solve the above problems, the present invention provides a compressor double-cylinder structure, which includes a first cylinder part and a second cylinder part sequentially arranged along the axial direction, the first cylinder part has a first compression chamber, and the second cylinder part has a second compression chamber;

[0006] Among them, the compressor double-cylinder structure has an air suction groove running through both axial ends, and the air suction groove has a first groove section located on the inner wall of the first compression chamber and a second groove section located on the inner wall of the second compression chamber; the outer peripheral wall of the compressor double-cylinder structure is also provided with an air suction hole connected to the air suction groove, and the first groove section and the second groove section both inhale air through the air suction hole.

[0007] In some embodiments, the air suction hole passes through the air suction groove, and an air outlet is formed on the groove wall of the air suction groove; wherein,

[0008] A partial opening area of ​​the air outlet is located on the first slot section; and / or a partial opening area of ​​the air outlet is located on the second slot section.

[0009] In some embodiments, the compressor dual-cylinder structure is an integrally formed structure.

[0010] In some embodiments, the compressor double-cylinder structure has a compression chamber and a vane groove, the compression chamber and the vane groove both pass through the axial ends of the compressor double-cylinder structure, and the vane groove and the suction groove are both arranged on the side wall of the compression chamber; wherein the portion of the compression chamber located on the first cylinder portion forms the first compression chamber, and the portion located on the second cylinder portion forms the second compression chamber; the portion of the vane groove located on the first cylinder portion forms the first vane groove, and the portion located on the second cylinder portion forms the second vane groove; a partition is provided on the compressor double-cylinder structure, the partition is used to separate the first vane groove and the second vane groove, and the partition is also used to separate the first compression chamber and the second compression chamber;

[0011] Wherein, the partition is detachable.

[0012] In some embodiments, the compression chamber and the vane groove form a groove body structure, and the groove body structure has openings at both axial ends of the compressor dual-cylinder structure. The partition is used to be sleeved in the groove body structure and can be disassembled and assembled from the opening.

[0013] In some embodiments, the partition includes a first partition and a second partition, the first partition is located in the sliding vane groove to separate the first sliding vane groove and the second sliding vane groove; the second partition is located in the compression chamber to separate the first compression chamber and the second compression chamber;

[0014] Wherein, the first partition is used to position the second partition in both the circumferential direction and the axial direction.

[0015] In some embodiments, the second partition plate has a first end and a second end opposite to each other in the axial direction of the compressor dual-cylinder structure;

[0016] A circumferential positioning groove extending from the first end to the second end is provided on the outer side wall of the second partition plate, and one end of the first partition plate is inserted into the circumferential positioning groove to position the circumference of the second partition plate.

[0017] In some embodiments, the outer wall of the second partition is provided with axial positioning grooves at both ends of the compressor dual-cylinder structure in the axial direction, and the first partition is provided with a first positioning protrusion and a second positioning protrusion; the first partition is inserted into one of the axial positioning grooves through the first positioning protrusion, and is inserted into the other axial positioning groove through the second positioning protrusion to position the second partition in the axial direction.

[0018] In some embodiments, when the second partition plate has a first end and a second end opposite to each other in the axial direction of the compressor dual-cylinder structure, and a circumferential positioning groove extending from the first end to the second end is provided on the outer wall of the second partition plate, and one end of the first partition plate is inserted into the circumferential positioning groove to position the second partition plate circumferentially, the two axial positioning grooves are located at both ends of the circumferential positioning groove.

[0019] In some embodiments, a sealing ring is sleeved between the second partition plate and the inner wall of the compression chamber; or, the second partition plate and the inner wall of the compression chamber are sealed by interference fit.

[0020] The present invention also provides a pump body assembly, which includes the compressor double-cylinder structure described in any one of the above.

[0021] The present invention also provides a compressor, which includes the compressor double-cylinder structure described in any one of the above; or includes the pump body assembly described in the above.

[0022] The double-cylinder structure of a compressor, a pump assembly and a compressor provided by the present invention have the following beneficial effects:

[0023] 1. Since the inclined baffle channel and the inclined lower cylinder channel in the prior art are both designed as inclined holes, and the inclined holes do not penetrate the axial ends of the compressor double cylinder structure, segmented processing is required, which is more complicated and leads to low processing efficiency. In the present invention, the inclined baffle channel and the inclined lower cylinder channel in the prior art are replaced by suction grooves. Since the suction grooves penetrate the axial ends of the compressor double cylinder structure, the cutting can be directly carried out along the axial feed of the compressor double cylinder structure during processing, and the processing can be completed in one time without segmented processing, so that the processing is more convenient and the processing efficiency is higher.

[0024] 2. The present invention makes the first slot section and the second slot section directly connected to the air intake hole, which can reduce the amplitude of the change in the movement direction of the airflow when it flows into the first slot section, thereby greatly reducing the gas impact loss and channel eddy loss caused by the change in the movement direction of the fluid, which is beneficial to improving the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] Figure 1 It is a cross-sectional view of a conventional double-cylinder single-suction pump body assembly;

[0027] Figure 2 yes Figure 1 Another cross-sectional view of a conventional double-cylinder single-suction pump body assembly;

[0028] Figure 3 is a cross-sectional view of a pump assembly of the present invention;

[0029] Figure 4 yes Figure 3 Another cross-sectional view of the pump assembly;

[0030] Figure 5 It is a schematic diagram of the double-cylinder structure of the compressor of the present invention;

[0031] Figure 6 yes Figure 5 Cross-sectional view along the BB direction;

[0032] Figure 7 yes Figure 5 Sectional view along AA direction;

[0033] Figure 8 is a schematic structural diagram of a first partition provided by an embodiment of the present invention;

[0034] Fig. 9 yes Figure 8 Cross-sectional view along the DD direction;

[0035] Fig.10 is a schematic structural diagram of a second partition provided by an embodiment of the present invention;

[0036] Fig.11 yes Fig.10 Sectional view along CC direction;

[0037] Fig.12 is a schematic diagram of the pump assembly when the second partition plate of the present invention is interference-fitted with the compression chamber;

[0038] Fig.13 is a cross-sectional view of the second partition of the present invention when the second partition is interference-fitted with the compression chamber;

[0039] Fig.14 yes Fig.13A top view of the second partition in FIG.

[0040] The accompanying drawings are marked as follows:

[0041] 1. Crankshaft; 2. First flange; 3. First silencer; 4. First roller; 5. Upper cylinder; 6. Partition; 7. Second roller; 8. Lower cylinder; 9. Second flange; 10. Second silencer; 11. First vane; 12. Second vane; 13. Compressor double cylinder structure; 14. Second partition; 15. First partition; 16. Sealing ring; 17. Annular groove; 18. Circumferential positioning groove; 19. Axial positioning groove; 20. First positioning protrusion; 21. Second positioning protrusion; 22. Compression chamber; 23. Suction groove; 24. Vane groove; 25. Intake hole; 25a, first opening area; 25b, second opening area; 26, upper cylinder intake channel; 27, inclined partition channel; 28, inclined lower cylinder channel; 131, first cylinder part; 132, second cylinder part; 141, first end; 142, second end; 145, partition; 151, one end of the first partition; 221, first compression chamber; 222, second compression chamber; 224, slot structure; 231, first slot section; 232, second slot section; 241, first slide vane slot; 242, second slide vane slot; 251, air outlet. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See also Figure 3-7 As shown, according to an embodiment of the present invention, a compressor double-cylinder structure 13 is provided, which includes a first cylinder part 131 and a second cylinder part 132 arranged in sequence along the axial direction. The first cylinder part 131 has a first compression chamber 221, and the second cylinder part 132 has a second compression chamber 222. Among them, the compressor double-cylinder structure 13 has an air suction groove 23 running through both ends of the axial direction, and the air suction groove 23 has a first groove section 231 located on the inner wall of the first compression chamber 221 and a second groove section 232 located on the inner wall of the second compression chamber 222. An air suction hole 25 connected to the air suction groove 23 is also provided on the outer peripheral wall of the compressor double-cylinder structure 13. Both the first groove section 231 and the second groove section 232 inhale air through the air suction hole 25.

[0047] The above-mentioned intake groove 23 and intake hole 25 cooperate to form the intake channel of the compressor double-cylinder structure 13 of the present invention, wherein the intake hole 25 can be processed along the radial direction of the compressor double-cylinder structure 13, and the intake groove 23 can be processed along the axial direction of the compressor double-cylinder structure 13.

[0048] Since the inclined baffle channel 27 and the inclined lower cylinder channel 28 in the prior art are both designed as inclined holes, and the inclined holes do not penetrate the axial ends of the compressor double cylinder structure 13, segmented processing is required, which is more complicated and leads to low processing efficiency. In the present invention, the inclined baffle channel 27 and the inclined lower cylinder channel 28 in the prior art are replaced by the air suction groove 23. Since the air suction groove 23 penetrates the axial ends of the compressor double cylinder structure, the cutting can be directly carried out along the axial feed of the compressor double cylinder structure 13 during processing, and the processing can be completed in one time without segmented processing, so that the processing is more convenient and the processing efficiency is higher.

[0049] In some embodiments, Figure 3 As shown, the aforementioned air intake groove 23 may be a linear groove extending along the axial direction of the compressor double-cylinder structure 13, which can further facilitate processing and improve processing efficiency.

[0050] In some embodiments, Figure 3 As shown, the aforementioned air intake hole 25 can be a linear hole extending along the radial direction of the compressor dual-cylinder structure 13, which has the effect of facilitating processing.

[0051] In some embodiments, Figure 3 As shown, the aforementioned air intake hole 25 passes through the air intake groove 23, and forms an air outlet 251 on the groove wall of the air intake groove 23. Part of the opening area of ​​the air outlet 251 is located on the first groove section 231. In order to distinguish from the following, the opening area of ​​the air outlet 251 located on the first groove section 231 is taken as the first opening area 25a (i.e. Figure 3 The gas at the gas outlet 251 can directly enter the first slot section 231 through the first opening area 25a. The above design enables the first slot section 231 to be directly connected to the air intake hole 25, which can reduce the amplitude of the change in the direction of the air flow when it flows into the first slot section 231, thereby greatly reducing the gas impact loss and channel eddy loss caused by the change in the direction of the fluid, which is beneficial to improving the energy efficiency of the compressor.

[0052] In some embodiments, Figure 3 As shown, part of the opening area of ​​the aforementioned air outlet 251 is located on the second slot section 232. In order to distinguish from the above, the opening area of ​​the air outlet 251 located on the second slot section 232 is taken as the second opening area 25b (i.e. Figure 3The gas at the gas outlet 251 can directly enter the second slot section 232 through the second opening area 25b. The above design enables the second slot section 232 to be directly connected to the air intake hole 25, which can reduce the amplitude of the change in the direction of the air flow when it flows into the second slot section 232, thereby greatly reducing the gas impact loss and channel eddy loss caused by the change in the direction of the fluid, which is beneficial to improving the energy efficiency of the compressor.

[0053] In some embodiments, the aforementioned compressor dual-cylinder structure 13 may be an integrally formed structure.

[0054] Among them, Figure 1-2 As shown, the double-cylinder structure of the compressor in the prior art is a split structure, which is composed of an upper cylinder 5, a lower cylinder 8 and a partition 6. Figure 3-4 As shown, the compressor dual-cylinder structure 13 of the present invention is an integrally formed structure, and adopts a single cylinder structure to replace the upper cylinder 5 and the lower cylinder 8 in the prior art, thereby reducing the processing of at least one cylinder part. In actual production and processing, both material costs and machining costs will be reduced.

[0055] In some embodiments, Figure 5-7 As shown, the aforementioned compressor double-cylinder structure 13 has a compression chamber 22 and a vane groove 24. The compression chamber 22 and the vane groove 24 both pass through the axial ends of the compressor double-cylinder structure 13, and the vane groove 24 and the aforementioned suction groove 23 are both arranged on the side wall of the compression chamber 22. Among them, the part of the compression chamber 22 located on the first cylinder part 131 forms the aforementioned first compression chamber 221, and the part of the compression chamber 22 located on the second cylinder part 132 forms the aforementioned second compression chamber 222. The part of the vane groove 24 located on the first cylinder part 131 forms the first vane groove 241, and the part located on the second cylinder part 132 forms the second vane groove 242. As shown Figure 4 As shown, a separator 145 is provided on the compressor double cylinder structure 13 of the present invention, and the separator 145 is used to separate the first vane groove 241 and the second vane groove 242, and the separator 145 is also used to separate the first compression chamber 221 and the second compression chamber 222. The first vane groove 241, the second vane groove 242, the first compression chamber 221 and the second compression chamber 222 can all work normally through the separation of the separator 145.

[0056] In the above example, since the compression chamber 22 and the vane groove 24 both pass through the axial ends of the compressor double-cylinder structure 13, the processing is convenient.

[0057] In some embodiments, the aforementioned partition 145 is detachable, which has the technical effect of facilitating disassembly, assembly and maintenance.

[0058] It should be noted here that: in some other examples, the aforementioned partition 145 can be integrally formed on the aforementioned compressor dual-cylinder structure 13.

[0059] In order to achieve the technical effect of the aforementioned detachable separator 145, in some embodiments, such as Figure 5 As shown, the compression chamber 22 and the vane slot 24 form a slot structure 224, which has openings at both axial ends of the compressor dual-cylinder structure 13. The partition 145 is used to be sleeved in the slot structure 224 and can be disassembled from the openings at both ends of the slot structure 224.

[0060] In some embodiments, Figure 4 As shown, the aforementioned partition 145 may include a first partition 15 and a second partition 14. The first partition 15 is located in the vane groove 24 to separate the first vane groove 241 and the second vane groove 242. The second partition 14 is located in the compression chamber 22 to separate the first compression chamber 221 and the second compression chamber 222. The first partition 15 is used to position the second partition 14 in both the circumferential and axial directions to prevent the second partition 14 from moving in the circumferential and axial directions and affecting the operation of the first compression chamber 221 and the second compression chamber 222.

[0061] The first slide slot 241 is used to install the first slide 11, and the second slide slot 242 is used to install the second slide 12. The first partition 15 also supports the first slide 11 and the second slide 12. In some cases, the first partition 15 can also be called a slide bracket.

[0062] In order to achieve the effect of the first separator 15 positioning the second separator 14 in the circumferential direction, in some embodiments, as Figure 10-11 As shown, the second partition plate 14 has a first end 141 and a second end 142 opposite to each other in the axial direction of the compressor dual cylinder structure 13. A circumferential positioning groove 18 is provided on the outer side wall of the second partition plate 14, which runs from the first end 141 to the second end 142. Figure 4 As shown, one end of the first partition plate 15 is inserted into the circumferential positioning groove 18 to position the second partition plate 14 in the circumferential direction.

[0063] In the above example, the end of the first partition 15 is plugged into and matched with the circumferential positioning groove 18 on the outer side wall of the second partition 14 , so that the first partition 15 can position the second partition 14 in the circumferential direction.

[0064] In order to achieve the effect of the first baffle 15 positioning the second baffle 14 in the axial direction, in some embodiments, as Figure 8-11As shown, the outer side wall of the second partition plate 14 is provided with axial positioning grooves 19 at both ends of the compressor dual-cylinder structure 13 in the axial direction, and the first partition plate 15 is provided with a first positioning protrusion 20 and a second positioning protrusion 21. The first partition plate 15 is inserted into one axial positioning groove 19 through the first positioning protrusion 20, and is inserted into the other axial positioning groove 19 through the second positioning protrusion 21, so as to position the second partition plate 14 in the axial direction.

[0065] In the above example, the first positioning protrusion 20 is inserted into an axial positioning groove 19 on the outer side wall of the second partition 14, so as to limit one axial side of the second partition 14, and the second positioning protrusion 21 is inserted into another axial positioning groove 19 on the outer side wall of the second partition 14, so as to limit the other axial side of the second partition 14. The first positioning protrusion 20 and the second positioning protrusion 21 cooperate to position the second partition 14 in the axial direction and prevent the second partition 14 from moving in the axial direction.

[0066] In some embodiments, Figure 10-11 As shown, when the second partition plate 14 has a first end 141 and a second end 142 relative to each other in the axial direction of the compressor dual-cylinder structure 13, and a circumferential positioning groove 18 is provided on the outer wall of the second partition plate 14, which extends from the first end 141 to the second end 142, and one end of the first partition plate 15 is inserted into the circumferential positioning groove 18 to position the second partition plate 14 circumferentially, the aforementioned two axial positioning grooves 19 can be located at both ends of the circumferential positioning groove 18, so that the first partition plate 15 can be simultaneously circumferentially and axially positioned from the same side of the second partition plate 14.

[0067] In one example, if Figure 4 As shown, a sealing ring 16 may be provided between the second partition plate 14 and the inner wall of the compression chamber 22 to prevent gas from flowing between the first compression chamber 221 and the second compression chamber 222. The sealing ring 16 may be a rubber sealing ring or the like. Fig.11 As shown, an annular groove 17 may be provided on the side wall of the second partition plate 14 , and the sealing ring 16 may be sleeved in the annular groove 17 .

[0068] In another example, if Figure 12-14 As shown, the aforementioned second partition 14 and the inner wall of the compression chamber 22 can also be sealed by interference fit, which can also achieve the effect of preventing gas blowby between the first compression chamber 221 and the second compression chamber 222. In this other example, in order to facilitate the interference fit between the second partition 14 and the inner wall of the compression chamber 22, the heating compressor double cylinder structure 13 or the freezing second partition 14 can be selected during assembly.

[0069] The present invention also provides a pump body assembly, which includes any one of the above-mentioned compressor double-cylinder structures 13. Among them, because the pump body assembly adopts the above-mentioned compressor double-cylinder structure 13, since the inclined baffle channel 27 and the inclined lower cylinder channel 28 in the prior art are both designed as inclined holes, and the inclined holes do not pass through the axial ends of the compressor double-cylinder structure 13, segmented processing is required, and the processing is more complicated, resulting in low processing efficiency. In the present invention, the inclined baffle channel 27 and the inclined lower cylinder channel 28 in the prior art are replaced by the air suction groove 23. Since the air suction groove 23 passes through the axial ends of the compressor double-cylinder structure, the cutting can be directly carried out along the axial feed of the compressor double-cylinder structure 13 during processing, and the processing can be completed in one time without segmented processing, so that the processing is more convenient and the processing efficiency is higher.

[0070] like Figure 3 and Figure 4 As shown, the pump assembly of the present invention also includes a crankshaft 1, a first flange 2, a first muffler 3, a first roller 4, a second roller 7, a second flange 9, a second muffler 10, a first vane 11 and a second vane 12. The first vane 11 is used to be installed in the first vane groove 241, and the second vane 12 is used to be installed in the second vane groove 242. Among them, the first flange 2 can be an upper flange, the first muffler 3 can be an upper muffler, the first roller 4 can be an upper roller, the second roller 7 can be a lower roller, the second flange 9 can be a lower flange, and the second muffler 10 can be a lower muffler. The aforementioned compression chamber 22, the vane groove 24 and the suction groove 23 form a first slot structure, which runs through the axial ends of the compressor double cylinder structure 13. The first slot structure has a first opening at one axial end of the compressor double cylinder structure 13, and the first slot structure has a second opening at the other axial end of the compressor double cylinder structure 13. The aforementioned first flange 2 covers the first opening so that the first compression chamber 221 can work normally. The second flange 9 covers the second opening so that the second compression chamber 222 can work normally. The refrigerant enters the compressor double-cylinder structure 13 from the air intake hole 25, and is split at the air outlet 251 at the tail end of the air intake hole 25, entering the first compression chamber 221 and the second compression chamber 222 respectively, ensuring that the first compression chamber 221 and the second compression chamber 222 have the same air intake volume. At the same time, compared with the two independent cylinders of the traditional split compressor, the diameter of the air intake port is limited. The present invention innovatively uses an integrated compressor double-cylinder structure 13 to complete the air supply of the first compression chamber 221 and the second compression chamber 222, and the diameter of the air intake hole 25 can have a larger margin than the existing two independent short cylinders, and the cross-sectional area of ​​the air intake hole 25 can be greatly increased. For example, the diameter of the air intake hole 25 can be increased from 12 mm to 14 mm, and the cross-sectional area of ​​the air intake hole 25 increases by 36%, thereby increasing the upper limit of the diameter of the air intake hole 25.

[0071] The present invention adopts an integrated compressor double cylinder structure 13 and a partition 145 to replace the upper cylinder 5, the partition 6 and the lower cylinder 8 of the traditional solution, which not only saves the number of parts, but also ensures the coaxiality of the first compression chamber 221 and the second compression chamber 222, and saves processing costs and improves production efficiency in one processing. Compared with the traditional solution, the outer diameter of the second partition 14 of the present invention is reduced, so that there is a gap between the first slide 11 in the first slide slot 241 and the second slide 12 in the second slide slot 242, which lacks support. Therefore, the first partition 15 is designed to ensure that the first slide 11 is in the first slide slot 241, and the second slide 12 is in the second slide slot 242.

[0072] The pump assembly of the present invention can be assembled as follows: during assembly, the sealing ring 16 is first assembled in the annular groove 17 of the second partition 14, and then the first partition 15 and the second partition 14 are assembled together, the corresponding first partition 15 is embedded in the circumferential positioning groove 18 of the second partition 14, and the first positioning protrusion 20 and the second positioning protrusion 21 on the first partition 15 are respectively inserted into the corresponding axial positioning groove 19 on the second partition 14. The first partition 15 and the second partition 14 are assembled to form the aforementioned partition 145, which is sometimes also referred to as a partition slide bracket assembly. During assembly, the first compression chamber 221 can be assembled first or the second compression chamber 222 can be assembled first. This example takes the assembly of the first compression chamber 221 as an example. First, assemble the first flange 2 and the first muffler 3 onto the compressor double cylinder structure 13, then install the crankshaft 1 and the first roller 4, install the first vane 11 into the first vane slot 241, and then install the partition 145. In this step, the first partition 15 of the partition 145 is installed from the opening of the vane slot 24, and the second partition 14 is installed from the opening of the compression chamber 22. The first partition 15 of the partition 145 presses the first vane 11, and the compression chamber 22 limits the translation of the second partition 14 in the horizontal and vertical directions, as well as the rotation in the horizontal direction and the vertical direction. The first partition 15 is limited by the first vane 11 and the second vane 12, and the first partition 15 limits the axial translation and rotation of the second partition 14. At this point, the six degrees of freedom of the second partition 14 are all limited. Then assemble the second roller 7 and the second slide 12, and then assemble the second flange 9 and the second muffler 10, and then complete the centering and locking screws on the automatic centering machine, and the assembly of the pump body assembly is completed.

[0073] The present invention also provides a compressor, which includes any one of the above-mentioned compressor dual-cylinder structures 13; or includes the above-mentioned pump body assembly. Among them, because the compressor adopts the above-mentioned compressor dual-cylinder structure 13 or pump body assembly, since the inclined baffle channel 27 and the inclined lower cylinder channel 28 in the prior art are both designed as inclined holes, and the inclined holes do not pass through the axial ends of the compressor dual-cylinder structure, segmented processing is required, and the processing is more complicated, resulting in low processing efficiency. In the present invention, the intake groove 23 is used to replace the inclined baffle channel 27 and the inclined lower cylinder channel 28 in the prior art. Since the intake groove 23 passes through the axial ends of the compressor dual-cylinder structure 13, the cutting can be directly carried out along the axial feed of the compressor dual-cylinder structure 13 during processing, and the processing can be completed in one time without segmented processing, so that the processing is more convenient and the processing efficiency is higher.

[0074] like Figure 1 and Figure 2 In the compressor pump body parts production process, the double-cylinder single-intake compressor pump body parts mainly include crankshaft 1, first flange 2, first muffler 3, first roller 4, upper cylinder 5, partition 6, second roller 7, second flange 9, second muffler 10, first slide 11 and second slide 12. The upper cylinder 5, lower cylinder 8 and partition 6 are all provided with inclined or vertical gas channels. The processing of this channel that runs through the upper and lower cylinders and the partition 6 not only needs to ensure the position of the channels on the three parts, but also belongs to an inclined hole. This processing process is costly. Figure 3 and Figure 4The present invention adopts a cylinder structure to replace the upper cylinder 5 and the lower cylinder 8 in the prior art, and adopts a partition 145 without a gas passage to replace the partition 6 with a gas passage in the prior art. According to a rough estimate, the entire processing cost in the process of machining a cylinder is saved, and the processing cost of a hole of the partition 6 is reduced, which accounts for about 25% of the cost of the pump body. The double-cylinder structure 13 of the compressor of the present invention is cut in one process during machining, and the first compression chamber 221 and the second compression chamber 222 share a sliding vane groove 24, ensuring that the first cylinder part 131 and the second cylinder part 132 have a higher degree of symmetry. The first cylinder part 131 and the second cylinder part 132 share the same cylinder inner circle (i.e., the aforementioned compression chamber 22), which can have a higher coaxiality than the upper and lower cylinders of the traditional split double-cylinder compressor. Compared with the traditional split double cylinder + partition 6 layout, no matter which component the air intake port is arranged on, the air intake caliber is limited by the thickness of this component. Under the premise that the geometric parameters of the compression chamber remain unchanged, the thickness of the integrated double cylinder structure of the present invention is more than doubled, so that the upper limit of the air intake caliber of the double cylinder structure 13 of the compressor of the present invention is greatly improved. For example, the cross-sectional area of ​​the air intake port increases by 36% when the diameter is increased from 12mm to 14mm. The present invention can increase the upper limit of the air intake port diameter. Moreover, compared with the traditional double cylinder separate air supply, the air intake hole 25 of the double cylinder structure 13 of the compressor of the present invention is directly connected to the air intake side of the first compression chamber 221 and the second compression chamber 222, which greatly reduces the gas impact loss and channel eddy current loss caused by the change of movement direction of the fluid due to the opening of the circulation channel.

[0075] Among them, the compressor double cylinder structure 13 of the present invention is a double cylinder single suction structure, which can take into account the suction volume of both the first cylinder part 131 and the second cylinder part 132; at the same time, when the suction resistance is at a certain level, it reaches or even exceeds the suction volume of the double cylinder double suction structure compressor. The technical solution of the present invention can simplify the pump body parts of the double cylinder compressor, reduce the processing procedures of the double cylinder compressor, and improve the production efficiency, which can not only reduce the cost but also enable the double cylinder single suction compressor to achieve the double cylinder double suction suction volume. In particular, it can improve the inherent disadvantage of the double cylinder single suction when the double cylinder double suction has insufficient suction of the lower cylinder when the double cylinder single suction is running at a large flow rate, narrow the gap in high frequency energy efficiency between single suction and double suction, improve the energy efficiency of the double cylinder single suction compressor, and further amplify the cost advantage of single suction, while having the advantages of low cost of double cylinder single suction and relatively higher energy efficiency of double cylinder double suction, providing more choices in the product development process with increasing demand for cost reduction and efficiency improvement.

[0076] Compared with the dual-cylinder single-intake structure, the present invention realizes that no matter whether the intake hole 25 is set in the first cylinder part 131 or the second cylinder part 132, the intake volume of the other cylinder part will not be affected by the position of the intake hole 25, and the same intake effect as the dual-cylinder dual-intake structure is achieved in the dual-cylinder single-intake compressor.

[0077] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0078] 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 double cylinder structure (13), characterized in that: The invention comprises a first cylinder part (131) and a second cylinder part (132) which are sequentially arranged along the axial direction, wherein the first cylinder part (131) has a first compression chamber (221), and the second cylinder part (132) has a second compression chamber (222); The compressor double-cylinder structure (13) has an air intake groove (23) running through both ends of the axial direction, and the air intake groove (23) has a first groove section (231) located on the inner wall of the first compression chamber (221) and a second groove section (232) located on the inner wall of the second compression chamber (222); an air intake hole (25) connected to the air intake groove (23) is also provided on the outer peripheral wall of the compressor double-cylinder structure (13), and the first groove section (231) and the second groove section (232) both inhale air through the air intake hole (25).

2. The compressor double-cylinder structure (13) according to claim 1, characterized in that: The air suction hole (25) passes through the air suction groove (23), and an air outlet (251) is formed on the groove wall of the air suction groove (23); wherein, A partial opening area of ​​the air outlet (251) is located on the first slot section (231); and / or a partial opening area of ​​the air outlet (251) is located on the second slot section (232).

3. The compressor double-cylinder structure (13) according to claim 1, characterized in that: The compressor double-cylinder structure (13) is an integrally formed structure.

4. The compressor double-cylinder structure (13) according to claim 3 is characterized in that: The compressor double-cylinder structure (13) comprises a compression chamber (22) and a vane groove (24), wherein the compression chamber (22) and the vane groove (24) both pass through two axial ends of the compressor double-cylinder structure (13), and the vane groove (24) and the suction groove (23) are both arranged on the side wall of the compression chamber (22); wherein the portion of the compression chamber (22) located on the first cylinder portion (131) forms the first compression chamber (221), and the portion located on the second cylinder portion (132) forms the second compression chamber (222); The portion of the vane groove (24) located on the first cylinder portion (131) forms a first vane groove (241), and the portion located on the second cylinder portion (132) forms a second vane groove (242); a partition (145) is provided on the compressor double-cylinder structure (13), and the partition (145) is used to separate the first vane groove (241) and the second vane groove (242), and the partition (145) is also used to separate the first compression chamber (221) and the second compression chamber (222); wherein the partition (145) is detachable.

5. The compressor double-cylinder structure (13) according to claim 4, characterized in that: The compression chamber (22) and the vane groove (24) together form a groove body structure (224), the groove body structure (224) having openings at both axial ends of the compressor double-cylinder structure (13), and the partition (145) is used to be sleeved in the groove body structure (224) and can be disassembled and assembled from the openings.

6. The compressor double-cylinder structure (13) according to claim 4 or 5, characterized in that: The partition (145) comprises a first partition plate (15) and a second partition plate (14); the first partition plate (15) is located in the sliding vane groove (24) to separate the first sliding vane groove (241) and the second sliding vane groove (242); the second partition plate (14) is located in the compression chamber (22) to separate the first compression chamber (221) and the second compression chamber (222); The first partition plate (15) is used to position the second partition plate (14) in both the circumferential and axial directions.

7. The compressor double-cylinder structure (13) according to claim 6, characterized in that: The second partition plate (14) has a first end (141) and a second end (142) opposite to each other in the axial direction of the compressor dual-cylinder structure (13); A circumferential positioning groove (18) is provided on the outer side wall of the second partition plate (14) and extends from the first end (141) to the second end (142); one end of the first partition plate (15) is inserted into the circumferential positioning groove (18) to position the second partition plate (14) in the circumferential direction.

8. The compressor double-cylinder structure (13) according to claim 6, characterized in that: The outer wall of the second partition plate (14) is provided with axial positioning grooves (19) at both ends of the compressor dual-cylinder structure (13) in the axial direction, and the first partition plate (15) is provided with a first positioning protrusion (20) and a second positioning protrusion (21); the first partition plate (15) is inserted into one of the axial positioning grooves (19) through the first positioning protrusion (20), and is inserted into the other axial positioning groove (19) through the second positioning protrusion (21), so as to position the second partition plate (14) in the axial direction.

9. The compressor double-cylinder structure (13) according to claim 8, characterized in that: When the second partition plate (14) has a first end (141) and a second end (142) opposite to each other in the axial direction of the compressor dual-cylinder structure (13), and a circumferential positioning groove (18) extending from the first end (141) to the second end (142) is provided on the outer wall of the second partition plate (14), and one end (151) of the first partition plate (15) is inserted into the circumferential positioning groove (18) to position the second partition plate (14) in the circumferential direction, the two axial positioning grooves (19) are located at both ends of the circumferential positioning groove (18).

10. The compressor double-cylinder structure (13) according to claim 6, characterized in that: A sealing ring (16) is sleeved between the second partition plate (14) and the inner wall of the compression chamber (22); or, the second partition plate (14) and the inner wall of the compression chamber (22) are sealed by means of an interference fit.

11. A pump assembly, characterized in that: It comprises the compressor double-cylinder structure (13) according to any one of claims 1-10.

12. A compressor, characterized in that: It comprises the compressor double-cylinder structure (13) described in any one of claims 1 to 10; or it comprises the pump body assembly described in claim 11.

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