Compressor pump body, compressor and air conditioning equipment

Abstract

The utility model provides a compressor pump body, a compressor and air conditioning equipment, the compressor pump body comprises a pump body assembly and a crankshaft assembly arranged in the pump body assembly in a penetrating mode, and the pump body assembly comprises a first bearing, a first air cylinder, a partition plate, a second air cylinder and a second bearing; fastening threaded holes are formed in the first air cylinder or the second air cylinder or the first bearing, so that at least parts of the first bearing, the first air cylinder, the partition plate, the second air cylinder and the second bearing are fastened through fastening bolts; in addition, a pre-core threaded hole is formed in the first air cylinder or the second air cylinder, so that the first bearing and the first air cylinder as well as the second bearing and the second air cylinder are centered and pre-tightened through a pre-core bolt; the displacement range of the compressor pump body is 12.9 cc to 24 cc, at least one of the first air cylinder and the second air cylinder is a powder metallurgy component, and the outer diameter range of the powder metallurgy component is 92 mm to 102 mm. The compressor body solves the technical problem of high manufacturing cost of a compressor in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning compressors, specifically to a compressor pump body, a compressor, and an air conditioning device. Background Technology

[0002] The compressor is a crucial component of air conditioning equipment, and its cost accounts for a significant proportion of the overall air conditioning cost. This is especially true for compressors with larger displacements (e.g., 2.0 HP and above), which have even higher manufacturing costs. Furthermore, even after a series of cost-reduction design efforts, it is often difficult to further reduce compressor costs, resulting in high manufacturing costs for both the compressor and the air conditioner itself. This negatively impacts both business production and consumer spending.

[0003] It is evident that the relevant technologies suffer from the technical problem of high manufacturing costs for air conditioning compressors, which are difficult to further reduce. Currently, no effective solution has been proposed to address this technical problem. Utility Model Content

[0004] The main objective of this invention is to provide a compressor pump body, a compressor, and an air conditioning device to solve the technical problem of excessively high manufacturing costs of air conditioning compressors in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a compressor pump body is provided. The compressor pump body includes a pump body assembly and a crankshaft assembly disposed therethrough. The pump body assembly includes a first bearing, a first cylinder, a partition plate, a second cylinder, and a second bearing arranged sequentially along a predetermined direction. The compressor pump body also includes fastening bolts. The first cylinder, the second cylinder, or the first bearing is provided with fastening threaded holes. The fastening bolts cooperate with the fastening threaded holes to fasten at least a portion of the first bearing, the first cylinder, the partition plate, the second cylinder, and the second bearing. The displacement of the compressor pump body ranges from 12.9cc to 24cc. At least one of the first cylinder and the second cylinder is a powder metallurgy part, and the outer diameter of the powder metallurgy part ranges from 92mm to 102mm.

[0006] Furthermore, fastening bolts are inserted through the first bearing, the first cylinder, the partition, and the second cylinder to fasten all four components; or, fastening bolts are inserted through the first cylinder, the partition, the second cylinder, and the second bearing to fasten all four components.

[0007] Furthermore, the first cylinder is a powder metallurgy part, and the second cylinder is a casting. A fastening threaded hole is provided in the second cylinder. The first bearing, the first cylinder, and the partition plate are all provided with first through holes. Fastening bolts are inserted into the first through holes in the first bearing, the first cylinder, and the partition plate to fasten the first bearing, the first cylinder, the partition plate, and the second cylinder. Alternatively, the first cylinder is a casting, and the second cylinder is a powder metallurgy part. A fastening threaded hole is provided in the first cylinder. The partition plate, the second cylinder, and the second bearing are all provided with second through holes. Fastening bolts are inserted into the second through holes in the partition plate, the second cylinder, and the second bearing to fasten the first cylinder, the partition plate, the second cylinder, and the second bearing.

[0008] Furthermore, both the first and second cylinders are powder metallurgy parts, with multiple fastening bolts divided into two groups, and multiple fastening threaded holes also divided into two groups. The first group of fastening threaded holes is located in the second cylinder. The first bearing, the first cylinder, and the partition plate all have multiple first through holes. Each fastening bolt from the first group passes through one of these first through holes and connects to the corresponding threaded holes in the first group of fastening threaded holes, thus fastening the first bearing, the first cylinder, the partition plate, and the second cylinder together. The second group of fastening threaded holes is located in the first cylinder. The partition plate, the second cylinder, and the second bearing all have multiple second through holes. Each fastening bolt from the second group passes through one of these second through holes and connects to the corresponding threaded holes in the second group of fastening threaded holes, thus fastening the first cylinder, the partition plate, the second cylinder, and the second bearing together.

[0009] Furthermore, the compressor pump body also includes a predetermined core bolt, through which the first bearing and the first cylinder are aligned and connected; or, through which the second cylinder and the second bearing are aligned and connected.

[0010] Furthermore, there are multiple fastening bolts, which are arranged sequentially at intervals around the central axis of the compressor pump body; there are multiple pre-core bolts, which are arranged sequentially at intervals around the central axis of the compressor pump body; and / or, the multiple fastening bolts correspond one-to-one with the multiple pre-core bolts, and each fastening bolt and its corresponding pre-core bolt are coaxially arranged.

[0011] Furthermore, the fastening threaded hole for fastening bolt connection is set on the first bearing, and the fastening bolt passes through the first bearing, the first cylinder, the partition, the second cylinder and the second bearing to fasten the five components; the first cylinder and the second cylinder are each provided with two pre-core threaded holes, and the first bearing and the first cylinder are aligned and connected by the pre-core bolt; the second cylinder and the second bearing are aligned and connected by the pre-core bolt.

[0012] Furthermore, the content of substances in the materials used in powder metallurgy parts meets the following requirements: Cu≤1.0%, 0.2%≤S≤0.4%.

[0013] Furthermore, the tensile strength of the material used in the powder metallurgy parts is greater than or equal to 150 MPa, and the HRB of the material used in the powder metallurgy parts is greater than or equal to 60.

[0014] According to another aspect of the present invention, a compressor is provided, the compressor including the compressor pump body described above.

[0015] According to another aspect of the present invention, an air conditioning device is provided, which includes the compressor described above.

[0016] The compressor pump body of this embodiment includes a pump body assembly and a crankshaft assembly passing through it. The pump body assembly includes a first bearing, a first cylinder, a partition, a second cylinder, and a second bearing arranged sequentially along a preset direction. The compressor pump body also includes fastening bolts. The first cylinder or the second cylinder is provided with a fastening threaded hole. The fastening bolts cooperate with the fastening threaded holes to fasten at least a portion of the first bearing, the first cylinder, the partition, the second cylinder, and the second bearing. The displacement range of the compressor pump body is 12.9cc to 24cc. At least one of the first cylinder and the second cylinder is a powder metallurgy part, and the outer diameter of the powder metallurgy part ranges from 92mm to 102mm. In related technologies, for dual-cylinder pump bodies of compressors with a displacement of 12.9cc or more, the cylinders are usually made of castings. After miniaturizing the pump body design, the applicant further improved the pump body structure. Specifically, for compressor pump bodies with a displacement of 12.9cc or more, the diameter of the pump body cylinder can be controlled within the range of 92mm to 102mm. By using powder metallurgy parts to replace castings, the cost advantages of powder metallurgy parts are fully utilized, thereby effectively reducing the manufacturing cost of the pump body and solving the technical problem of high compressor manufacturing cost in related technologies. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the compressor pump body of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a cylinder manufactured using casting in related technologies;

[0020] Figure 3This is a schematic diagram of the cylinder structure of the compressor pump body according to an embodiment of the present invention.

[0021] The above figures include the following reference numerals:

[0022] 10. Pump body assembly; 20. Crankshaft assembly; 201. Crankshaft; 202. First piston; 203. Second piston; 1. First bearing; 2. First cylinder; 3. Baffle plate; 4. Second cylinder; 5. Second bearing; 6. First muffler; 7. Second muffler; 100. Fastening bolt; 200. Pre-core bolt. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Please refer to Figure 1 To achieve the above objectives, embodiments of this utility model provide a compressor pump body, which includes a pump body assembly 10 and a crankshaft assembly 20 disposed therein. The pump body assembly 10 includes a first bearing 1, a first cylinder 2, a partition 3, a second cylinder 4, and a second bearing 5 arranged sequentially along a preset direction. The compressor pump body also includes a fastening bolt 100, and the first cylinder 2 or the second cylinder 4 is provided with a fastening threaded hole. The fastening bolt 100 cooperates with the fastening threaded hole to fasten at least a portion of the first bearing 1, the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5. The displacement of the compressor pump body ranges from 12.9cc to 24cc, and at least one of the first cylinder 2 and the second cylinder 4 is a powder metallurgy part with an outer diameter ranging from 92mm to 102mm.

[0025] In related technologies, for dual-cylinder pump bodies of compressors with a displacement of 12.9cc or more, the cylinders are usually made of castings. After miniaturizing the pump body design, the applicant further improved the pump body structure. Specifically, for compressor pump bodies with a displacement of 12.9cc or more, the diameter of the pump body cylinder can be controlled within the range of 92mm to 102mm. By using powder metallurgy parts to replace castings, the cost advantages of powder metallurgy parts are fully utilized, thereby effectively reducing the manufacturing cost of the pump body and solving the technical problem of high compressor manufacturing cost in related technologies.

[0026] In practice, the material utilization rate of cast cylinders is only about 65%, with large machining allowances, numerous hole machining operations, and high costs. Powder metallurgy, on the other hand, can achieve a material utilization rate of over 90%, with small machining allowances and the ability to form holes, effectively reducing the manufacturing cost of compressor pump bodies and solving the technical problem of high manufacturing costs for compressor pump bodies.

[0027] Specifically, the crankshaft assembly 20 includes a crankshaft 201, a first piston 202 and a second piston 203. The crankshaft 201 is provided with two eccentric parts, and the first piston 202 and the second piston 203 are correspondingly fitted onto the two eccentric parts. The first piston 202 is located in the first cylinder 2, and the second piston 203 is located in the second cylinder 4.

[0028] The fastening bolt 100 fastens at least a portion of the first bearing 1, the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5, that is, it can fasten two, three, four, or all of them.

[0029] In a preferred embodiment, the height of the cylinder using powder metallurgy parts is greater than or equal to 20 mm, thereby ensuring sufficient height for threaded engagement, resulting in more dispersed stress on the threaded connection and ensuring connection strength. Preferably, the mating depth between the fastening bolt 100 and the fastening threaded hole on the powder metallurgy part is greater than or equal to 7 mm.

[0030] In practice, the fastening bolt 100 passes through the first bearing 1, the first cylinder 2, the partition 3, and the second cylinder 4 to fasten the four components; or, the fastening bolt 100 passes through the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5 to fasten the four components.

[0031] In this embodiment, the fastening bolt 100 fastens four adjacent components among the first bearing 1, the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5. Specifically, depending on the installation method of the fastening bolt 100, the objects it fastens also differ. When the fastening bolt 100 passes through the first bearing 1 side and mates with the fastening threaded hole on the second cylinder 4, it fastens the first bearing 1, the first cylinder 2, the partition 3, and the second cylinder 4. When it passes through the second bearing 5 side and mates with the fastening threaded hole on the first cylinder 2, it fastens the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5.

[0032] Specifically, the first cylinder 2 is a powder metallurgy part, and the second cylinder 4 is a casting. A fastening threaded hole is provided in the second cylinder 4. The first bearing 1, the first cylinder 2, and the partition plate 3 are all provided with first through holes. The fastening bolt 100 passes through the first through holes in the first bearing 1, the first cylinder 2, and the partition plate 3 to fasten the first bearing 1, the first cylinder 2, the partition plate 3, and the second cylinder 4. Alternatively, the first cylinder 2 is a casting, and the second cylinder 4 is a powder metallurgy part. A fastening threaded hole is provided in the first cylinder 2, and the partition plate 3, the second cylinder 4, and the second bearing 5 are all provided with second through holes. The fastening bolt 100 passes through the second through holes in the partition plate 3, the second cylinder 4, and the second bearing 5 to fasten the first cylinder 2, the partition plate 3, the second cylinder 4, and the second bearing 5.

[0033] As described above, embodiments of this application reduce the manufacturing cost of the compressor pump body by designing at least one of the first cylinder 2 and the second cylinder 4 as a powder metallurgy component, leveraging the cost advantages of powder metallurgy. In specific implementations, selecting different cylinders as powder metallurgy components requires different designs for the compressor pump body to ensure the connection strength of the pump body.

[0034] Specifically, in one optional embodiment, the first cylinder 2 is a powder metallurgy part and the second cylinder 4 is a casting. Since the structural strength of the casting is higher than that of the powder metallurgy part, in this embodiment, the fastening thread hole is designed on the second cylinder 4. In this way, the thread connection strength between the fastening bolt 100 and the second cylinder 4 can be guaranteed, and the thread connection failure due to insufficient cylinder material strength can be avoided.

[0035] In another alternative embodiment, the second cylinder 4 is made of powder metallurgy and the first cylinder 2 is made of casting. Similarly, since the casting has higher structural strength, the fastening threaded hole is designed on the second cylinder 4 in this embodiment to ensure that the fastening bolt 100 reliably connects to each structural component.

[0036] In this embodiment, both the first cylinder 2 and the second cylinder 4 are powder metallurgy parts. There are multiple fastening bolts 100, divided into two groups. There are also multiple fastening threaded holes, also divided into two groups. The first group of fastening threaded holes is located in the second cylinder 4. The first bearing 1, the first cylinder 2, and the partition plate 3 each have multiple first through holes. Each fastening bolt 100 of the first group passes through the first through holes in the first bearing 1, the first cylinder 2, and the partition plate 3, and connects with the corresponding threaded holes in the first group of fastening threaded holes to allow the bolts to pass through the first cylinder 4. A set of fastening bolts 100 fastens the first bearing 1, the first cylinder 2, the partition 3, and the second cylinder 4. A second set of fastening threaded holes is provided in the first cylinder 2. The partition 3, the second cylinder 4, and the second bearing 5 are all provided with multiple second through holes. Each set of fastening bolts 100 is correspondingly inserted into the second through holes in the partition 3, the second cylinder 4, and the second bearing 5, and connected to the corresponding threaded holes in the second set of fastening threaded holes, so as to fasten the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5 through the second set of fastening bolts 100.

[0037] In this embodiment, both the first cylinder 2 and the second cylinder 4 are made of powder metallurgy, thereby maximizing the cost advantages of powder metallurgy and better controlling the manufacturing cost of the compressor pump body. As mentioned above, the structural strength of powder metallurgy parts is lower than that of castings. Therefore, in order to ensure the reliability of the fastening bolts 100 in fastening the various structural components, this embodiment divides the multiple fastening bolts 100 into two groups. Correspondingly, the fastening threaded holes are also divided into two groups. It should be noted that there is a one-to-one correspondence between the fastening threaded holes and the fastening bolts 100.

[0038] In the specific implementation scheme, the first set of fastening threaded holes is designed on the second cylinder 4. After each fastening bolt 100 of the first set passes through the first bearing 1, it passes through the first cylinder 2 and the partition 3 in sequence, and then connects with the corresponding fastening threaded holes on the second cylinder 4. Similarly, the second set of fastening threaded holes is designed on the first cylinder 2. After each fastening bolt 100 of the second set passes through the second bearing 5, it passes through the second cylinder 4 and the partition 3 in sequence, and connects with the corresponding fastening threads on the first cylinder 2. In this way, the tension of the threaded connection can be evenly distributed to the first cylinder 2 and the second cylinder 4, avoiding failure of the threaded connection of the powder part due to concentrated tension, and ensuring the reliability of the connection and fastening between various components of the compressor pump body.

[0039] like Figure 1 As shown, the compressor pump body also includes a predetermined core bolt 200, through which the first bearing 1 and the first cylinder 2 are aligned and connected; or, through which the second cylinder 4 and the second bearing 5 are aligned and connected.

[0040] As described above, in this embodiment, the fastening bolt 100 connects four adjacent components: the first bearing 1, the first cylinder 2, the partition plate 3, the second cylinder 4, and the second bearing 5. For the connection of the remaining component, this embodiment uses a pre-core bolt 200 to align and connect it with the adjacent cylinder. This alignment, or pre-core connection, ensures the coaxiality of the pump body structure and prevents the pump body structure from jamming due to eccentricity. In actual assembly, one bearing can be aligned and connected to the corresponding cylinder first using the pre-core bolt 200, and then the remaining components can be fastened using the fastening bolt 100.

[0041] Considering the different stress conditions, in a preferred embodiment, the threaded connection depth between the pre-set core bolt 200 and the powder metallurgy part is less than the threaded connection depth between the fastening bolt 100 and the powder metallurgy part.

[0042] Specifically, there are multiple fastening bolts 100, which are arranged sequentially at intervals around the central axis of the compressor pump body; there are multiple pre-core bolts 200, which are arranged sequentially at intervals around the central axis of the compressor pump body; and / or, the multiple fastening bolts 100 correspond one-to-one with the multiple pre-core bolts 200, and each fastening bolt 100 and its corresponding pre-core bolt 200 are coaxially arranged.

[0043] In practical implementation, the number of fastening bolts 100 and pre-set core bolts 200 can be flexibly set according to actual needs. For example, in an optional embodiment, four fastening bolts 100 and four pre-set core bolts 200 are provided, with the four fastening bolts 100 and the four pre-set core bolts being evenly spaced along the circumference of the pump body. In another embodiment, for example, six or more fastening bolts 100 and pre-set core bolts 200 may also be provided.

[0044] In a preferred embodiment, such as Figure 1 As shown, by designing the fastening bolt 100 and the predetermined core bolt 200 as a coaxial structure, the connection of the pump body structure can be ensured with fewer openings, effectively simplifying the structure of the pump body, which is conducive to ensuring the simplicity of the main body structure and controlling manufacturing costs.

[0045] In a preferred embodiment, the material content of the powder metallurgy part meets the following requirements: Cu ≤ 1.0%, 0.2% ≤ S ≤ 0.4%.

[0046] In this embodiment, since at least one cylinder is designed as a powder metallurgy part and connected to the fastening bolt 100 through the fastening threaded hole on it, there are certain requirements for the strength of the threaded connection structure. This embodiment further improves the structural strength of the powder metallurgy part by controlling the content of copper and sulfur in the powder metallurgy part, which is conducive to ensuring the reliability of the connection.

[0047] In a preferred embodiment, the tensile strength of the material used in the powder metallurgy part is greater than or equal to 150 MPa, and the HRB of the material used in the powder metallurgy part is greater than or equal to 60.

[0048] like Figure 1 As shown, the compressor pump body of this embodiment also includes a first silencer 6 and a second silencer 7. The first silencer 6 is fastened to the side of the first bearing 1 away from the first cylinder 2, and the second silencer 7 is fastened to the side of the second bearing 5 away from the second cylinder 4, thereby providing better protection for the relevant parts of the pump body through the first silencer 6 and the second silencer 7. In addition, the embodiment of this utility model also provides a compressor, which includes the above-described compressor pump body.

[0049] like Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of a cylinder produced by casting in related technologies. Cast cylinders cannot form hole structures and holes need to be machined after casting, resulting in low material utilization and high processing costs. Figure 3This is a schematic diagram of the cylinder structure of the compressor pump body according to an embodiment of the present invention. The cylinder can be directly formed with a hole structure by using cylinder metallurgical parts, which has a high material utilization rate and helps to reduce the manufacturing cost of the compressor cylinder.

[0050] Finally, an embodiment of this utility model also provides an air conditioning device, which includes the compressor described above.

[0051] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0052] The compressor pump body of this utility model embodiment includes a pump body assembly 10 and a crankshaft assembly 20 passing through it. The pump body assembly 10 includes a first bearing 1, a first cylinder 2, a partition 3, a second cylinder 4, and a second bearing 5 arranged sequentially along a preset direction. The compressor pump body also includes a fastening bolt 100. The first cylinder 2 or the second cylinder 4 is provided with a fastening threaded hole. The fastening bolt 100 cooperates with the fastening threaded hole to fasten at least a portion of the first bearing 1, the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5. The displacement range of the compressor pump body is 12.9cc to 24cc. At least one of the first cylinder 2 and the second cylinder 4 is a powder metallurgy part, and the outer diameter of the powder metallurgy part is in the range of 92mm to 102mm. In related technologies, for dual-cylinder pump bodies of compressors with a displacement of 12.9cc or more, the cylinders are usually made of castings. After miniaturizing the pump body design, the applicant further improved the pump body structure. Specifically, for compressor pump bodies with a displacement of 12.9cc or more, the diameter of the pump body cylinder can be controlled within the range of 92mm to 102mm. By using powder metallurgy parts to replace castings, the cost advantages of powder metallurgy parts are fully utilized, thereby effectively reducing the manufacturing cost of the pump body and solving the technical problem of high compressor manufacturing cost in related technologies.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compressor pump body characterized by, The compressor pump body comprises a pump body assembly (10) and a crankshaft assembly (20) penetrating in the pump body assembly (10), the pump body assembly (10) comprises a first bearing (1), a first cylinder (2), a partition plate (3), a second cylinder (4) and a second bearing (5) arranged in sequence along a preset direction; the compressor pump body further comprises a fastening bolt (100), the first cylinder (2) or the second cylinder (4) or the first bearing (1) is provided with a fastening threaded hole, the fastening bolt (100) is matched with the fastening threaded hole, so that at least part of the first bearing (1), the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5) is fastened through the fastening bolt (100); Wherein, the displacement range of the compressor pump body is 12.9cc to 24cc, at least one of the first cylinder (2) and the second cylinder (4) is a powder metallurgy part, and the outer diameter of the powder metallurgy part ranges from 92mm to 102mm.

2. The compressor pump body of claim 1, wherein, The fastening bolt (100) penetrates the first bearing (1), the first cylinder (2), the partition plate (3) and the second cylinder (4) to fasten the four; Or, the fastening bolt (100) penetrates the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5) to fasten the four.

3. The compressor pump body of claim 2, wherein, The first cylinder (2) is the powder metallurgy part, the second cylinder (4) is a casting, the fastening threaded hole is arranged on the second cylinder (4), the first bearing (1), the first cylinder (2) and the partition plate (3) are all provided with first through holes, the fastening bolt (100) penetrates the first through holes on the first bearing (1), the first cylinder (2) and the partition plate (3) to fasten the first bearing (1), the first cylinder (2), the partition plate (3) and the second cylinder (4); Or, the first cylinder (2) is a casting, the second cylinder (4) is the powder metallurgy part, the fastening threaded hole is arranged on the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5) are all provided with second through holes, and the fastening bolt (100) penetrates the second through holes on the partition plate (3), the second cylinder (4) and the second bearing (5) to fasten the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5).

4. The compressor pump body of claim 2, wherein, The first cylinder (2) and the second cylinder (4) are both the powder metallurgy parts, the fastening bolt (100) is a plurality of, the plurality of fastening bolts (100) are divided into two groups, the fastening threaded hole is a plurality of, and the plurality of fastening threaded holes are divided into two groups; The first group of fastening threaded holes are arranged on the second cylinder (4), the first bearing (1), the first cylinder (2) and the partition plate (3) are all provided with a plurality of first through holes, each first group of fastening bolts (100) is correspondingly arranged in the first through holes on the first bearing (1), the first cylinder (2) and the partition plate (3), and is connected with the corresponding threaded hole in the first group of fastening threaded holes, so that the first bearing (1), the first cylinder (2), the partition plate (3) and the second cylinder (4) are fastened by the first group of fastening bolts (100); The second group of fastening threaded holes are arranged on the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5) are all provided with a plurality of second through holes, each second group of fastening bolts (100) is correspondingly arranged in the second through holes on the partition plate (3), the second cylinder (4) and the second bearing (5), and is connected with the corresponding threaded hole in the second group of fastening threaded holes, so that the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5) are fastened by the second group of fastening bolts (100).

5. The compressor pump body of any one of claims 1 to 4, wherein, The compressor pump body further comprises a predetermined core bolt (200), the first bearing (1) and the first cylinder (2) are aligned and connected by the predetermined core bolt (200); or the second cylinder (4) and the second bearing (5) are aligned and connected by the predetermined core bolt (200).

6. The compressor pump body of claim 5, wherein, The fastening bolts (100) are a plurality of, and the plurality of fastening bolts (100) are sequentially and spacedly arranged around the central axis of the compressor pump body; the predetermined core bolts (200) are a plurality of, and the plurality of predetermined core bolts (200) are sequentially and spacedly arranged around the central axis of the compressor pump body; And / or, the plurality of fastening bolts (100) correspond to the plurality of predetermined core bolts (200) one by one, and each fastening bolt (100) is coaxially arranged with the corresponding predetermined core bolt (200).

7. The compressor pump body of claim 1, wherein, The fastening threaded hole connected with the fastening bolt (100) is arranged on the first bearing (1), the fastening bolt (100) is arranged in the first bearing (1), the first cylinder (2), the partition plate (3), the second cylinder (4) and the second bearing (5) to fasten the five; the first cylinder (2) and the second cylinder (4) are both provided with two predetermined core threaded holes, the first bearing (1) and the first cylinder (2) are aligned and connected by the predetermined core bolt (200); the second cylinder (4) and the second bearing (5) are aligned and connected by the predetermined core bolt (200).

8. The compressor pump body of any of claims 1-4 and 7, wherein, The content of the substance in the material used in the powder metallurgy part satisfies: Cu≤1.0%, 0.2%≤S≤0.4%.

9. The compressor pump body of any of claims 1-4 and 7, wherein, The tensile strength of the material used in the powder metallurgy part is greater than or equal to 150 MPa, and the HRB of the material used in the powder metallurgy part is greater than or equal to 60.

10. A compressor characterized by, The compressor comprises the compressor pump body according to any one of claims 1 to 9.

11. An air conditioning apparatus characterized by comprising: The air conditioning equipment comprises the compressor according to claim 10.

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