Rotary compressor oil circuit structure and rotary compressor

Abstract

This invention belongs to the field of compressor technology, and discloses a rotary compressor oil circuit structure and a rotary compressor. The rotary compressor oil circuit structure is used to input lubricating oil into the lower cylinder blade slot. The rotary compressor oil circuit structure includes an oil collection groove and an oil return channel. The oil collection groove is connected to the oil return channel. The end of the oil return channel away from the oil collection groove has a channel outlet, which is located on one side of the lower cylinder blade slot. The lubricating oil collected in the oil collection groove is guided back to the lower cylinder blade slot by the oil return channel. The rotary compressor oil circuit structure of this invention can ensure that sufficient lubricating oil enters the lower cylinder blade slot, improving the lubrication effect of the lower blades in the lower cylinder blade slot.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to the oil circuit structure of a rotary compressor and a rotary compressor. Background Technology

[0002] Blade wear is a major cause of failure in rotary compressors. The traditional solution is to create oil guide holes in the cylinder. During compressor operation, lubricating oil is discharged with the gas. After oil-gas separation, the lubricating oil flows through the motor channel, passes through the flow holes in the upper cylinder head (located above the blades), and then flows into the cylinder blade slots. This introduction of lubricating oil into the cylinder blade slots enhances lubrication and reduces blade wear. However, in twin-cylinder compressors, because the blades in the lower cylinder are positioned the same as those in the upper cylinder, the lubricating oil return flow is blocked by the upper cylinder, resulting in less lubricating oil reaching the lower cylinder blade slots. When the twin-cylinder compressor operates with a low oil level, the lower blades in the lower cylinder blade slots are still prone to wear.

[0003] Therefore, there is an urgent need for a rotary compressor oil circuit structure and a rotary compressor to solve the above problems. Summary of the Invention

[0004] One objective of this invention is to provide an oil circuit structure for a rotary compressor and a rotary compressor that ensures sufficient lubricating oil enters the lower cylinder blade groove, thereby improving the lubrication effect of the lower blade in the lower cylinder blade groove.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a rotary compressor oil circuit structure is provided for inputting lubricating oil into the lower cylinder vane slot. The rotary compressor oil circuit structure includes an oil collection tank and an oil return channel. The oil collection tank is connected to the oil return channel. The end of the oil return channel away from the oil collection tank is provided with a channel outlet. The channel outlet is located on one side of the lower cylinder vane slot. The lubricating oil collected in the oil collection tank is guided back to the lower cylinder vane slot by the oil return channel.

[0007] As an optional technical solution, the channel outlet is configured in a funnel shape.

[0008] As an optional technical solution, the oil collecting groove includes an inner oil collecting wall, the oil return channel includes an inner oil return wall, both the inner oil collecting wall and the inner oil return wall are arc-shaped, and the inner oil collecting wall and the inner oil return wall are smoothly connected.

[0009] As an optional technical solution, the center of the inner oil collecting wall overlaps with the center of the inner oil return wall.

[0010] As an optional technical solution, the oil collecting trough further includes an outer oil collecting wall, which is radially spaced from the inner oil collecting wall. The radial distance between the outer oil collecting wall and the inner oil collecting wall along the inner oil collecting wall is a first preset value. The oil return channel further includes an outer oil return wall, which is radially spaced from the inner oil return wall. The radial distance between the outer oil return wall and the inner oil return wall along the inner oil return wall is a second preset value. The first preset value is greater than the second preset value.

[0011] As an optional technical solution, the rotor compressor oil circuit structure includes multiple oil collection grooves, and adjacent oil collection grooves are connected through the oil return channel.

[0012] Secondly, a rotary compressor is provided, the rotary compressor including an oil collecting plate, an intermediate plate, an upper cylinder and an upper cylinder cover, and the oil circuit structure of the rotary compressor as described above is provided in any one of the oil collecting plate, the intermediate plate, the upper cylinder and the upper cylinder cover.

[0013] As an optional technical solution, the oil collecting plate is provided with the oil circuit structure of the rotor compressor, and the oil collecting plate is fixedly installed on the intermediate plate or the upper cylinder.

[0014] As an optional technical solution, the oil collecting plate is also provided with fixing holes, through which threaded fasteners pass to fix the oil collecting plate to the intermediate plate or the upper cylinder.

[0015] As an optional technical solution, the oil collecting plate is integrally formed with the intermediate plate or the upper cylinder.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention provides a rotary compressor oil circuit structure and a rotary compressor. The rotary compressor oil circuit structure is disposed in any one of the oil collecting plate, intermediate plate, upper cylinder, and upper cylinder cover. The rotary compressor oil circuit structure is used to input lubricating oil into the lower cylinder blade slot. The rotary compressor oil circuit structure includes an oil collecting groove and an oil return channel. The oil collecting groove is connected to the oil return channel. The end of the oil return channel away from the oil collecting groove has a channel outlet, which is located on one side of the lower cylinder blade slot. The lubricating oil collected in the oil collecting groove is guided back to the lower cylinder blade slot by the oil return channel. In this invention, the oil collecting groove corresponds to the oil return part of the rotary compressor. Lubricating oil flows into the oil collecting groove from the oil return part. The lubricating oil collected in the oil collecting groove is guided back to the lower cylinder blade slot by the oil return channel to lubricate the lower blades located in the lower cylinder blade slot, ensuring the lubrication effect of the lower blades in the lower cylinder blade slot, extending the service life of the rotary compressor oil circuit structure, the lower blades, and the lower cylinder, and ensuring the working efficiency of the rotary compressor. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a cross-sectional view of the rotary compressor described in the embodiment;

[0020] Figure 2 This is a schematic diagram of the structure of the intermediate plate described in the embodiment;

[0021] Figure 3 This is another structural schematic diagram of the intermediate plate described in the embodiment;

[0022] Figure 4 This is another structural schematic diagram of the intermediate plate described in the embodiment;

[0023] Figure 5 This is a schematic diagram of the upper cylinder structure described in the embodiment;

[0024] Figure 6 This is a schematic diagram of the upper cylinder head structure described in the embodiment;

[0025] Figure 7 This is a schematic diagram of the oil collection plate described in the embodiment.

[0026] In the picture:

[0027] 100. Oil collecting plate; 200. Intermediate plate; 300. Upper cylinder; 400. Upper cylinder head;

[0028] 1. Oil collection trough; 11. Inner oil collection wall; 12. Outer oil collection wall;

[0029] 2. Oil return channel; 21. Channel outlet; 22. Inner oil return wall; 23. Outer oil return wall; 24. Lubrication through hole; 25. Flow hole;

[0030] 3. Lower cylinder blade groove. Detailed Implementation

[0031] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment provides a rotary compressor, which includes an oil collecting plate 100, an intermediate plate 200, an upper cylinder 300, and an upper cylinder cover 400. The oil circuit structure of the rotary compressor is set in any one of the oil collecting plate 100, the intermediate plate 200, the upper cylinder 300, and the upper cylinder cover 400.

[0039] The rotary compressor in this embodiment is a twin-cylinder compressor. In the twin-cylinder compressor, the relative installation positions of the oil collecting plate 100, intermediate plate 200, upper cylinder 300, upper cylinder cover 400, upper blades, lower cylinder, lower cylinder cover and lower blades can refer to the prior art, and will not be described in detail in this embodiment.

[0040] The rotary compressor oil circuit structure of this embodiment is also applicable to single-cylinder compressors and other multi-cylinder compressors.

[0041] like Figures 2 to 7 As shown, the rotary compressor oil circuit structure of this embodiment is used to input lubricating oil into the lower cylinder vane groove 3. The rotary compressor oil circuit structure includes an oil collection tank 1 and an oil return channel 2. The oil collection tank 1 is connected to the oil return channel 2. The end of the oil return channel 2 away from the oil collection tank 1 is provided with a channel outlet 21. The channel outlet 21 is located on one side of the lower cylinder vane groove 3. The lubricating oil collected in the oil collection tank 1 is guided back to the lower cylinder vane groove 3 by the oil return channel 2.

[0042] Specifically, the oil collection tank 1 corresponds to the oil return section of the rotary compressor. Lubricating oil flows into the oil collection tank 1 from the oil return section. The lubricating oil collected in the oil collection tank 1 is guided back to the lower cylinder blade groove 3 by the oil return channel 2 to lubricate the lower blades located in the lower cylinder blade groove 3, ensuring the lubrication effect of the lower blades in the lower cylinder blade groove 3, extending the service life of the rotary compressor oil circuit structure, lower blades and lower cylinder, and ensuring the working efficiency of the rotary compressor.

[0043] Optionally, the channel outlet 21 is configured as a trumpet shape. The end of the return oil channel 2 closest to the oil collecting groove 1 is the channel inlet. The opening area of ​​the channel inlet is smaller than the opening area of ​​the channel outlet 21. The cross-sectional area of ​​the return oil channel 2 gradually decreases along the direction from the oil collecting groove 1 to the lower cylinder vane groove 3. The flow resistance of the lubricating oil along the direction from the oil collecting groove 1 to the lower cylinder vane groove 3 is less than the flow resistance of the lubricating oil along the direction from the lower cylinder vane groove 3 to the oil collecting groove 1. Therefore, configuring the channel outlet 21 as a trumpet shape is more conducive to the lubricating oil leaving the return oil channel 2 and entering the lower cylinder vane groove 3.

[0044] Optionally, the oil collecting groove 1 includes an inner oil collecting wall 11, and the oil return channel 2 includes an inner oil return wall 22. Both the inner oil collecting wall 11 and the inner oil return wall 22 are arc-shaped, and the inner oil collecting wall 11 and the inner oil return wall 22 are smoothly connected to improve the flow of lubricating oil in the inner oil collecting wall 11 and the inner oil return wall 22.

[0045] Optionally, the center of the inner oil collecting wall 11 overlaps with the center of the inner oil return wall 22.

[0046] Optionally, the oil collecting trough 1 further includes an outer oil collecting wall 12, which is radially spaced from the inner oil collecting wall 11. The radial distance between the outer oil collecting wall 12 and the inner oil collecting wall 11 is a first preset value. The oil return channel 2 further includes an outer oil return wall 23, which is radially spaced from the inner oil return wall 22. The radial distance between the outer oil return wall 23 and the inner oil return wall 22 is a second preset value. The first preset value is greater than the second preset value.

[0047] In this embodiment, the radial distance between the outer oil collecting wall 12 and the inner oil collecting wall 11 is increased to a first preset value to improve the storage capacity of the oil collecting groove 1. The radial distance between the outer oil return wall 23 and the inner oil return wall 22 is set to a second preset value, and the first preset value is greater than the second preset value, so that the oil collecting groove 1 and the oil return channel 2 are misaligned to prevent the oil return channel 2 from exporting the lubricating oil in the oil collecting groove 1 at once.

[0048] Optionally, the rotary compressor oil circuit structure includes multiple oil collection tanks 1, with adjacent oil collection tanks 1 connected by an oil return channel 2. Providing multiple oil collection tanks 1 increases the storage capacity of lubricating oil for future use.

[0049] Example 2

[0050] like Figure 2 As shown, in this embodiment, the oil circuit structure of the rotor compressor is set on the intermediate plate 200. The intermediate plate 200 is provided with an oil collection groove 1 and an oil return channel 2. The lower cylinder blade groove 3 is located on one side of the channel outlet 21. After the lubricating oil flows out from the channel outlet 21, it directly enters the lower cylinder blade groove 3.

[0051] like Figure 3 As shown, in some other embodiments, the intermediate plate 200 is provided with two oil collection grooves 1 and two oil return channels 2. The intermediate plate 200 is provided with a lubrication through hole 24, which is located between the two oil return channels 2 and directly above the lower cylinder vane groove 3. The two oil collection grooves 1 collect lubricating oil at the same time, so that the storage capacity of lubricating oil is larger. The lubricating oil flowing back from the two oil return channels 2 is injected into the lubrication through hole 24. After passing through the lubrication through hole 24, the lubricating oil enters the lower cylinder vane groove 3.

[0052] like Figure 4As shown, in some other embodiments, the intermediate plate 200 is provided with three oil collection grooves 1 and three oil return channels 2. The intermediate plate 200 is provided with a lubrication through hole 24, which is located between two of the oil return channels 2. The other oil return channel 2 connects to two adjacent oil collection grooves 1. The three oil collection grooves 1 collect lubricating oil at the same time, so that the storage capacity of lubricating oil is larger. The lubricating oil flowing back from the two oil return channels 2 is injected into the lubrication through hole 24. After passing through the lubrication through hole 24, the lubricating oil enters the lower cylinder blade groove 3.

[0053] Example 3

[0054] like Figure 5 As shown, in this embodiment, the oil circuit structure of the rotor compressor is set in the upper cylinder 300, the upper cylinder blade groove and the lower cylinder blade groove 3 are directly opposite each other, and the lubricating oil passes through the oil collection groove 1, the oil return channel 2, the upper cylinder blade groove and the lower cylinder blade groove 3 in sequence. The lubricating oil lubricates the upper blade in the upper cylinder blade groove and lubricates the lower blade in the lower cylinder blade groove 3.

[0055] Example 4

[0056] like Figure 7 As shown, in this embodiment, the oil circuit structure of the rotary compressor is provided on the oil collecting plate 100, which is fixedly installed on the intermediate plate 200 or the upper cylinder 300. The channel outlet 21 of the oil collecting plate 100 is located on one side of the lower cylinder blade groove 3. The oil collecting plate 100 guides the lubricating oil into the lower cylinder blade groove 3, thereby lubricating the lower blades.

[0057] Optionally, the oil collection plate 100 is also provided with fixing holes, through which threaded fasteners pass to fix the oil collection plate 100 to the intermediate plate 200 or the upper cylinder 300.

[0058] Optionally, the oil collecting plate 100 can be integrally formed with the intermediate plate 200 or the upper cylinder 300 to simplify the processing procedure and improve efficiency, while also increasing structural strength.

[0059] Example 5

[0060] like Figure 6 As shown, in this embodiment, the oil circuit structure of the rotor compressor is provided on the upper cylinder head 400. The upper cylinder head 400 is provided with a flow hole 25, which is located directly above the lower cylinder blade groove 3. The lubricating oil enters the flow hole 25 from the return oil channel 2 and then enters the lower cylinder blade groove 3 to lubricate the lower blade.

[0061] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A rotary compressor oil circuit structure for inputting lubricating oil into the downward cylinder vane groove (3), characterized in that, The rotary compressor oil circuit structure includes an oil collection tank (1) and an oil return channel (2). The oil collection tank (1) corresponds to the oil return part of the rotary compressor. Lubricating oil flows into the oil collection tank (1) from the oil return part. The oil collection tank (1) is connected to the oil return channel (2). The oil return channel (2) has a channel outlet (21) at one end away from the oil collection tank (1). The channel outlet (21) is located on one side of the lower cylinder vane slot (3). The lubricating oil collected in the oil collection tank (1) is guided back to the lower cylinder vane slot (3) by the oil return channel (2). The oil collecting groove (1) includes an inner oil collecting wall (11), and the oil return channel (2) includes an inner oil return wall (22). The oil collecting groove (1) also includes an outer oil collecting wall (12). The outer oil collecting wall (12) and the inner oil collecting wall (11) are arranged radially apart along the inner oil collecting wall (11). The radial distance between the outer oil collecting wall (12) and the inner oil collecting wall (11) along the inner oil collecting wall (11) is a first preset value. The oil return channel (2) also includes an outer oil return wall (23). The outer oil return wall (23) and the inner oil return wall (22) are arranged radially apart along the inner oil return wall (22). The radial distance between the outer oil return wall (23) and the inner oil return wall (22) along the inner oil return wall (22) is a second preset value. The first preset value is greater than the second preset value.

2. The rotary compressor oil circuit structure according to claim 1, characterized in that, The channel outlet (21) is configured in a trumpet shape.

3. The oil circuit structure of the rotary compressor according to claim 1, characterized in that, Both the inner oil collecting wall (11) and the inner oil return wall (22) are arc-shaped, and the inner oil collecting wall (11) and the inner oil return wall (22) are smoothly connected.

4. The rotary compressor oil circuit structure according to claim 3, characterized in that, The center of the inner oil collecting wall (11) overlaps with the center of the inner oil return wall (22).

5. The oil circuit structure of the rotary compressor according to any one of claims 1-4, characterized in that, The rotor compressor oil circuit structure includes multiple oil collection tanks (1), and two adjacent oil collection tanks (1) are connected by the oil return channel (2).

6. A rotary compressor, characterized in that, The rotary compressor includes an oil collecting plate (100), an intermediate plate (200), an upper cylinder (300), and an upper cylinder cover (400). The oil circuit structure of the rotary compressor as described in any one of claims 1-5 is provided in any one of the oil collecting plate (100), the intermediate plate (200), the upper cylinder (300), and the upper cylinder cover (400).

7. The rotary compressor according to claim 6, characterized in that, The oil collecting plate (100) is provided with the oil circuit structure of the rotor compressor, and the oil collecting plate (100) is fixedly installed on the intermediate plate (200) or the upper cylinder (300).

8. The rotary compressor according to claim 7, characterized in that, The oil collecting plate (100) is also provided with a fixing hole, through which a threaded fastener passes to fix the oil collecting plate (100) to the intermediate plate (200) or the upper cylinder (300).

9. The rotary compressor according to claim 7, characterized in that, The oil collecting plate (100) is integrally formed with the intermediate plate (200) or the upper cylinder (300).

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