Lower cylinder cover structure for compressor pump body, compressor pump body and compressor

Abstract

The utility model belongs to the technical field of refrigeration compressors, and discloses a lower cylinder cover structure for a compressor pump body, the compressor pump body and a compressor. The lower cover body is of a cylindrical structure, and the outer diameter of the lower cover body is the same as that of an air cylinder. The lower end face of the lower cover body extends in the direction of a lubricating oil pool and is arranged close to the oil level of the lubricating oil pool. The lower cover body is designed to be of the cylindrical structure, the lower end face of the lower cover body extends towards the lubricating oil pool, the lower end of the lower cover body occupies the space above the lubricating oil pool, on the premise that the oil level of the lubricating oil pool is guaranteed, the space above the lubricating oil pool is reduced, the gathering amount of refrigerating working media is reduced, and the refrigerating efficiency is improved. The filling amount of the lubricating oil is reduced, meanwhile, the dissolving amount of the refrigerant in the lubricating oil liquid is effectively reduced, the filling amount of the refrigerant is effectively reduced, and the safety of equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration compressors, and particularly relates to a lower cylinder cover structure for a compressor pump body, a compressor pump body and a compressor. Background Art

[0002] In a rolling rotor compressor, the pump body assembly generally includes an upper cylinder head, a cylinder, a crankshaft, a roller and a lower cylinder head; Figure 1 As shown, the existing lower cylinder head includes a cylinder head body 100 and a neck 200 protruding downward relative to the cylinder head body; wherein, the cylinder head body 100 is sealed and connected to the lower end surface of the cylinder, and the neck 200 protruding downward is used to support the short axis portion of the crankshaft; secondly, in order to meet the lubrication needs between the friction pairs in the compressor pump body assembly, a lubricating oil pool is usually arranged under the lower cylinder head, and the lubricating oil in the lubricating oil pool is transported to the contact surfaces of the friction pairs through the preset lubricating oil passages in the pump body assembly, thereby achieving the purpose of lubrication, cooling and heat dissipation.

[0003] With the continuous improvement of environmental protection and energy-saving requirements for compressor products, R290 refrigerant is widely used in rolling rotor compressors. Due to the flammable and explosive properties of R290 refrigerant itself, the refrigerant filling amount needs to be reduced as much as possible to improve the safety of the equipment. However, due to the large space size between the existing lower cylinder head and the lubricating oil pool, a large amount of R290 refrigerant is accumulated. At the same time, the content of R290 refrigerant accumulated in the space dissolved in the lubricating oil increases, which increases the overall filling amount of R290 refrigerant, thereby increasing the operating risk of the equipment. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model provides a lower cylinder cover structure for a compressor pump body, a compressor pump body and a compressor, so as to solve the technical problem that the overall filling amount of R290 working fluid is increased due to the large space size between the existing lower cylinder cover and the lubricating oil pool, thereby increasing the operating risk of the equipment.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a lower cylinder cover structure for a compressor pump body, comprising a lower cover body; the lower cover body is a circular columnar structure, and the outer diameter of the lower cover body is the same as the outer diameter of the cylinder; the lower end surface of the lower cover body extends toward the direction of the lubricating oil pool and is arranged close to the oil surface of the lubricating oil pool.

[0007] Furthermore, a lower cover inner hole is provided at the center of the lower cover body; wherein, the lower cover inner hole is used to assemble the short shaft portion of the crankshaft.

[0008] Furthermore, a lower cover oil groove is provided on the surface of the inner hole of the lower cover.

[0009] Furthermore, the upper end surface of the lower cover body is used to be sealed and connected to the lower end surface of the cylinder; wherein the lower cover body and the cylinder are connected by lower cover bolts.

[0010] Furthermore, it also includes a cover plate; the cover plate is coaxially and sealingly arranged on the lower end surface of the lower cover body;

[0011] The lower end surface of the lower cover body is provided with an annular groove, the notch of the annular groove is connected with the lower end surface of the lower cover body, and the bottom of the annular groove extends toward the upper end surface of the lower cover body.

[0012] Furthermore, the cover plate and the lower cover body are fixedly connected by cover plate bolts.

[0013] The utility model also provides a compressor pump body, comprising the lower cylinder cover structure for the compressor pump body.

[0014] Furthermore, the compressor pump body is a pump body structure in a lower exhaust state.

[0015] The utility model also provides a compressor, comprising the lower cylinder cover structure for the compressor pump body or the compressor pump body.

[0016] Furthermore, the compressor is filled with R290 working fluid.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model provides a lower cylinder cover structure for a compressor pump body, in which a lower cover main body is designed as a circular columnar structure, and the lower end surface of the lower cover main body is extended toward the direction of the lubricating oil pool, and the lower end portion of the lower cover main body is utilized to occupy the space above the lubricating oil pool, and under the premise of ensuring the oil level height of the lubricating oil pool, the space above the lubricating oil pool is reduced, thereby reducing the amount of refrigerant accumulated, and achieving the goal of effectively reducing the amount of refrigerant dissolved in the lubricating oil liquid while reducing the amount of lubricating oil filled, thereby effectively reducing the amount of refrigerant filled, and improving the safety of the equipment.

[0019] Furthermore, by providing an annular groove on the lower end surface of the lower cover body and sealing the lower end surface of the lower cover body with a cover plate, the weight of the lower cylinder cover is effectively reduced while reducing the amount of refrigerant filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The intended use status of the existing lower cylinder head;

[0021] Figure 2 This is a schematic diagram of the use state of the lower cylinder cover in Example 1;

[0022] Figure 3 This is a schematic diagram of the overall structure of the lower cylinder cover in Example 2.

[0023] Among them, 100 is a cylinder head body, 200 is a neck; 1 is a lower cover body, 2 is a cover plate, 3 is a cover plate bolt; and 11 is an annular groove. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Example 1

[0026] like Figure 2 As shown, this embodiment 1 provides a lower cylinder head structure for a compressor pump body, which is suitable for a pump body structure in a lower exhaust state; the lower cylinder head structure for a compressor pump body comprises a lower cover body 1; the lower cover body 1 is used to seal with the lower end face of the cylinder of the compressor pump body, the lower cover body 1 is a circular columnar structure, the center of the lower cover body 1 coincides with the center of the cylinder, and the outer diameter of the lower cover body 1 is the same as the outer diameter of the cylinder; wherein the upper end face of the lower cover body 1 is sealingly connected to the lower end face of the cylinder; the lower end face of the lower cover body 1 extends toward the direction of the lubricating oil pool, and is arranged close to the oil surface of the lubricating oil pool; preferably, the lower end face of the lower cover body 1 is in contact with the oil surface of the lubricating oil pool.

[0027] In this embodiment 1, a lower cover inner hole is provided at the center of the lower cover main body 1, and the lower cover inner hole is used to assemble the short axis portion of the crankshaft; wherein, the upper end of the lower cover inner hole is connected with the upper end surface of the lower cover main body 1, and the lower end of the lower cover inner hole is connected with the lower end surface of the lower cover main body 1; a lower cover oil groove is provided on the surface of the lower cover inner hole, and the lower cover oil groove serves as a channel for lubricating oil to lubricate the moving parts in the compressor pump body.

[0028] In this embodiment 1, the lower cover body 1 is connected to the cylinder by lower cover bolts; wherein, the lower cover bolts are evenly distributed along the circumferential direction of the lower cover body 1, one end of the lower cover bolts penetrates the lower cover body 1, and the other end of the lower cover bolts is anchored in the lower end surface of the cylinder.

[0029] The lower cylinder cover structure for the compressor pump body described in this embodiment 1 designs the lower cover body as a circular columnar structure, and extends the lower end surface of the lower cover body toward the lubricating oil pool, so as to reduce the space above the lubricating oil pool while ensuring the oil level of the lubricating oil pool, thereby reducing the accumulation of refrigerant, effectively reducing the amount of refrigerant dissolved in the lubricating oil liquid, and further effectively reducing the refrigerant filling amount, thereby improving the safety of the equipment.

[0030] Example 2

[0031] As attached Figure 3 As shown, this embodiment 2 provides a lower cover structure for a compressor pump body, which is suitable for a pump body structure in a lower exhaust state; the lower cylinder cover structure for the compressor pump body comprises a lower cover body 1 and a cover plate 2; the lower cover body 1 is coaxially and sealingly arranged below the lower end surface of the cylinder of the compressor pump body, and the lower cover body 1 is a circular columnar structure; wherein, the upper end surface of the lower cover body 1 is sealingly connected to the lower end surface of the cylinder, and the lower end of the lower cover body 1 extends toward the direction of the lubricating oil pool and is arranged close to the oil surface of the lubricating oil pool.

[0032] In this embodiment 2, a lower cover inner hole is provided at the center of the lower cover main body 1, and the lower cover inner hole is used to assemble the short axis portion of the crankshaft; wherein, the upper end of the lower cover inner hole is connected with the upper end surface of the lower cover main body 1, and the lower end of the lower cover inner hole is connected with the lower end surface of the lower cover main body 1; a lower cover oil groove is provided on the surface of the lower cover inner hole, and the lower cover oil groove serves as a channel for lubricating oil to lubricate the moving parts in the compressor pump body.

[0033] In this embodiment 2, an annular groove 11 is provided on the lower end surface of the lower cover body 1; the annular groove 11 is arranged in an annular shape around the inner hole of the lower cover; wherein the notch of the annular groove 11 is connected with the lower end surface of the lower cover body 1, and the bottom of the annular groove 11 extends toward the upper end surface of the lower cover body 1; it should be noted that the distance between the inner side wall of the annular groove 11 and the inner wall of the inner hole of the lower cover is greater than the distance between the outer side wall of the annular groove 11 and the outer cylindrical surface of the lower cover body 1, so as to ensure reliable support for the crankshaft.

[0034] In this embodiment 2, the cover plate 2 is a circular plate structure, and the cover plate 2 is coaxially and sealingly arranged on the lower end surface of the lower cover body 1, and is used to close the notch of the annular groove 11, thereby preventing the refrigerant or lubricating oil from entering the interior of the annular groove 11; wherein a through hole is arranged at the center of the cover plate 2, and the through hole is used to communicate with the inner hole of the lower cover; it should be noted that the through hole is sealed and connected with the inner hole of the lower cover at the connection.

[0035] In this embodiment 2, the lower cover body 1 is connected to the cylinder by a lower cover bolt; wherein, a threaded through hole is provided at the bottom of the annular groove 11, one end of the lower cover bolt is fixedly inserted into the threaded through hole, and the other end of the lower cover bolt is anchored in the lower end surface of the cylinder.

[0036] The lower cylinder cover structure for the compressor pump body described in this embodiment 2 is suitable for the pump body structure in the lower exhaust state; specifically, the lower cover body is designed as a circular columnar structure, and the lower end face of the lower cover body is extended toward the lubricating oil pool, so as to reduce the space above the lubricating oil pool while ensuring the oil level of the lubricating oil pool; secondly, by providing an annular groove on the lower end face of the lower cover body and sealing the lower end face of the lower cover body with a cover plate, the weight of the lower cylinder cover is effectively reduced while reducing the amount of refrigerant filling.

[0037] Example 3

[0038] This embodiment 3 provides a compressor pump body, including a crankshaft, an upper cover, a lower cover, a cylinder and a piston; the upper cover seal is arranged on the upper end surface of the cylinder, and the lower cover seal is arranged on the lower end surface of the cylinder; the crankshaft is concentrically assembled in the working chamber of the cylinder; wherein the lower cover adopts the lower cylinder cover structure for the compressor pump body as described in embodiment 1 or 2; specifically, the long axis portion of the crankshaft is inserted into the upper cover inner hole of the upper cover, and the short axis portion of the crankshaft is inserted into the lower cover inner hole of the lower cover; the piston is arranged in the working chamber of the cylinder, and is sleeved on the outside of the eccentric portion of the crankshaft; preferably, the compressor pump body is a pump body structure in the lower exhaust state.

[0039] It should be noted that the assembly principle and process between the lower cylinder head and the cylinder and crankshaft are similar to those of the existing compressor pump body, which will not be repeated here; in addition, the compressor pump body described in this embodiment 3 is suitable for compressors with different operating conditions, different application scenarios and different displacements; among them, different application scenarios are for example: air conditioning refrigeration, heat pump heating or refrigeration

[0040] Example 4

[0041] This embodiment 4 provides a compressor, including a shell and a motor assembly and a pump body assembly arranged in the shell. A lubricating oil pool is arranged at the bottom of the shell. The pump body assembly adopts the pump body assembly described in embodiment 3. It should be noted that the compressor is filled with R290 working fluid.

[0042] The lower cylinder cover structure for the compressor pump body, the compressor pump body and the compressor described in the utility model adopt a lower cover body with a circular columnar structure, and utilize the lower cover body to occupy the content volume of the lower chamber of the pump body in the compressor casing, so as to reduce the oil pool space. Under the condition of ensuring the oil level height, the lubricating oil filling amount can be effectively reduced, thereby reducing the amount of R290 working fluid dissolved in the oil, indirectly achieving the purpose of reducing the working fluid filling amount, and ensuring the safe operation of the compressor; the structure is simple, and is suitable for different working conditions, different application fields and the needs of fixed frequency and variable frequency compressor products.

[0043] The above embodiment is only one of the implementation methods that can realize the technical solution of the utility model. The scope of protection required by the utility model is not limited only to this embodiment, but also includes within the technical scope disclosed by the utility model, any changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field.

Claims

1. A lower cylinder cover structure for a compressor pump body, characterized in that: The invention comprises a lower cover body (1); the lower cover body (1) is a circular columnar structure, and the outer diameter of the lower cover body (1) is the same as the outer diameter of the cylinder; the lower end surface of the lower cover body (1) extends toward the lubricating oil pool and is arranged close to the oil surface of the lubricating oil pool.

2. A lower cylinder cover structure for a compressor pump body according to claim 1, characterized in that: A lower cover inner hole is arranged at the center of the lower cover body (1); wherein the lower cover inner hole is used for assembling the short shaft portion of the crankshaft.

3. A lower cylinder cover structure for a compressor pump body according to claim 2, characterized in that: A lower cover oil groove is arranged on the surface of the inner hole of the lower cover.

4. A lower cylinder cover structure for a compressor pump body according to claim 1, characterized in that: The upper end surface of the lower cover body (1) is used to be sealed and connected to the lower end surface of the cylinder; wherein the lower cover body (1) and the cylinder are connected by lower cover bolts.

5. The lower cylinder cover structure for a compressor pump body according to claim 1, characterized in that: It also includes a cover plate (2); the cover plate (2) is coaxially and sealingly arranged on the lower end surface of the lower cover body (1); The lower end surface of the lower cover body (1) is provided with an annular groove (11), the notch of the annular groove (11) is connected with the lower end surface of the lower cover body (1), and the bottom of the annular groove (11) extends toward the upper end surface of the lower cover body (1).

6. A lower cylinder cover structure for a compressor pump body according to claim 5, characterized in that: The cover plate (2) and the lower cover body (1) are fixedly connected by cover plate bolts (3).

7. A compressor pump body, characterized in that: It comprises a lower cylinder cover structure for a compressor pump body as described in any one of claims 1 to 6.

8. A compressor pump body according to claim 7, characterized in that: The compressor pump body is a pump body structure in a lower exhaust state.

9. A compressor, characterized in that: It comprises a lower cylinder cover structure for a compressor pump body as described in any one of claims 1 to 6 or a compressor pump body as described in any one of claims 7 to 8.

10. A compressor according to claim 9, characterized in that: The compressor is filled with R290 working fluid.

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