Oil conveying equipment and compressors thereof

Abstract

This invention provides an oil conveying device and a compressor having the same. The oil conveying device is located at the oil inlet of the suction pipe and includes a support frame. It has a first inlet, a second inlet, and a receiving cavity. The first inlet is located below the second inlet and is connected to the receiving cavity. An impeller with a liquid passage hole is rotatably disposed within the receiving cavity to convey oil entering the receiving cavity through the liquid passage hole to the oil inlet. A sealing structure is movably disposed on the support frame. The oil conveying device has a first oil conveying state where the sealing structure blocks the first inlet and a second oil conveying state where the sealing structure avoids the first inlet. When the oil level in the environment where the oil conveying device is located is greater than or equal to a preset oil level value, the oil conveying device is in the first oil conveying state. This invention effectively solves the problem of poor lubricating oil conveying capacity of the suction pipe of the compressor in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to an oil conveying device and a compressor having the same. Background Technology

[0002] Currently, the suction pipe of a rotary compressor extends into the oil sump at the bottom of the compressor. The pump body draws up the lubricating oil from the oil sump, and the lubricating oil flows through the crankshaft oil hole and is delivered to the inside of the pump body to lubricate the various moving parts in the compressor. This reduces frictional losses during compressor operation and ensures the compressor's power consumption, energy efficiency, and operational reliability.

[0003] However, during the actual operation of the compressor, the oil suction pipe rotates with the compressor, which in turn drives the lubricating oil in the oil sump to move. Under the action of liquid viscosity resistance, the lubricating oil will form a vortex, causing the central liquid level to drop, reducing the contact depth between the oil suction pipe and the lubricating oil, thereby reducing the oil suction capacity of the oil suction pipe, or even causing the oil suction pipe to be unable to suck up the lubricating oil, which seriously affects the operational reliability of the compressor. Summary of the Invention

[0004] The main objective of this invention is to provide an oil conveying device and a compressor having the same, so as to solve the problem that the oil suction pipe of the compressor in the prior art has poor conveying capacity for lubricating oil.

[0005] To achieve the above objectives, according to one aspect of the present invention, an oil conveying device is provided, located at the oil inlet of an oil suction pipe. The oil conveying device includes: a support having a first inlet, a second inlet, and a receiving cavity, wherein both the first and second inlets are connected to the receiving cavity, and the first inlet is located below the second inlet; an impeller having a liquid passage hole, the impeller being rotatably disposed within the receiving cavity for conveying oil entering the receiving cavity through the liquid passage hole to the oil inlet; and a sealing structure movably disposed on the support. The oil conveying device has a first oil conveying state where the sealing structure blocks the first inlet and a second oil conveying state where the sealing structure avoids the first inlet. When the oil level in the environment where the oil conveying device is located is greater than or equal to a preset oil level value, the oil conveying device is in the first oil conveying state.

[0006] Furthermore, the sealing structure is vertically adjustable along the height of the support to allow the sealing structure to switch between a first oil delivery state and a second oil delivery state.

[0007] Furthermore, the support has a first mating part, and the sealing structure includes: a sealing body having a second mating part, one of the first mating part and the second mating part being a protrusion, and the other of the first mating part and the second mating part being a concave part, the protrusion extending into the concave part and being able to move up and down along the extending direction of the concave part; and a sealing part disposed on the sealing body, the sealing part extending into the first liquid inlet to seal the first liquid inlet.

[0008] Furthermore, a third inlet is formed between the support and the sealing structure. When the oil conveying equipment is in the second oil conveying state, the third inlet is connected to the receiving cavity through the first inlet.

[0009] Furthermore, the support includes: a cylindrical body, the bottom of the cylindrical body having a first liquid inlet, the cylindrical body having a second liquid inlet and a first mating part on the cylindrical wall, the first mating part being located between the first liquid inlet and the second liquid inlet.

[0010] Furthermore, there is one second liquid inlet; or there are multiple second liquid inlets, which are spaced apart circumferentially along the cylindrical body; and / or there is one first mating part; or there are multiple first mating parts, which are spaced apart circumferentially along the cylindrical body.

[0011] Furthermore, the impeller includes: a cylinder having a liquid passage hole, the cylinder being used to connect with the oil suction pipe for synchronous rotation; multiple inclined blades, the multiple inclined blades being disposed on the outer circumferential surface of the cylinder and spaced apart along the circumference of the cylinder, with a liquid passage gap formed between each pair of adjacent inclined blades; wherein, when the oil conveying equipment is in the first oil conveying state, the oil sequentially enters the oil suction pipe through the second inlet, the liquid passage gap and the liquid passage hole.

[0012] Furthermore, the oil conveying equipment also includes a drive unit, which is connected to the sealing structure to drive the sealing structure to move up and down.

[0013] Furthermore, the density of the sealing structure is less than that of the oil. When the oil level in the environment where the oil conveying equipment is located is greater than or equal to the preset oil level value, the buoyancy applied by the oil to the sealing structure will push the sealing structure to seal the first inlet.

[0014] According to another aspect of the present invention, a compressor is provided, including a housing, an oil suction pipe, a compressor body, a lower flange, and an oil conveying device. The oil suction pipe, the compressor body, the lower flange, and the oil conveying device are all disposed inside the housing. The oil conveying device is located below the lower flange, and the support of the oil conveying device is connected to the lower flange. The oil conveying device is the aforementioned oil conveying device.

[0015] According to the technical solution of the present invention, an oil conveying device is provided at the oil inlet of the compressor suction pipe. The oil conveying device includes a bracket, an impeller and a sealing structure. The impeller is rotatably disposed in the receiving cavity of the bracket. The oil entering the receiving cavity is conveyed to the oil inlet through the liquid passage of the impeller. The first liquid inlet and the second liquid inlet of the bracket are both connected to the receiving cavity, and the first liquid inlet is located below the second liquid inlet. The sealing structure is movably disposed on the bracket to block or avoid the first liquid inlet. In this way, when the oil level in the environment where the oil conveying equipment is located is less than the preset oil level, the compressor operates at a high frequency and has a strong oil pumping capacity. At this time, the oil conveying equipment is in the second oil conveying state. The sealing structure avoids the first inlet, allowing the oil to be directly conveyed to the oil inlet through the first inlet. This avoids the impeller pressurizing the oil, which could lead to excessive oil delivery and affect the normal operation of the compressor, thereby improving the compressor's operational reliability. When the oil level in the environment where the oil conveying equipment is located is greater than or equal to the preset oil level, the compressor operates at a low frequency and has insufficient oil pumping capacity. At this time, the sealing structure is in the first oil conveying state. The sealing structure blocks the first inlet, and the oil entering the receiving cavity through the second inlet needs to be pressurized by the impeller before being conveyed to the oil inlet. This enhances the compressor's oil pumping capacity under low-frequency conditions, ensuring that the oil can lubricate all moving parts within the compressor. This solves the problem of poor lubricating oil delivery capacity of the compressor's suction pipe in the prior art, and improves the compressor's operational reliability. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A cross-sectional schematic diagram of an embodiment of the oil conveying device according to the present invention in a second oil conveying state is shown;

[0018] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of the oil conveying equipment in the first oil conveying state;

[0019] Figure 3 It shows Figure 1 A cross-sectional schematic diagram of the support frame for the oil conveying equipment;

[0020] Figure 4 It shows Figure 3 Top view of the support structure;

[0021] Figure 5 It shows Figure 1 A cross-sectional schematic diagram of the impeller of an oil conveying device;

[0022] Figure 6 It shows Figure 5 A three-dimensional structural diagram of the impeller;

[0023] Figure 7 It shows Figure 1 A cross-sectional schematic diagram of the sealing structure of an oil conveying equipment;

[0024] Figure 8 It shows Figure 7 A top view of the sealing structure;

[0025] Figure 9 A cross-sectional schematic diagram of an embodiment of the compressor according to the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 100. Oil conveying equipment; 10. Support; 11. First inlet; 12. Second inlet; 13. Receiving cavity; 14. Third inlet; 15. Cylindrical body; 20. Impeller; 21. Cylinder; 21a. Liquid passage hole; 22. Inclined blade; 30. Sealing structure; 31. Sealing body; 32. Sealing part; 200. Casing; 300. Oil suction pipe; 400. Compressor body; 500. Lower flange. Detailed Implementation

[0028] 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.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this invention, unless otherwise stated, directional terms such as "up" and "down" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0031] To address the problem of poor lubricating oil delivery capacity of the oil suction pipe in existing compressors, this application provides an oil delivery device and a compressor having the same.

[0032] like Figures 1 to 8As shown, the oil conveying device is located at the oil inlet of the oil suction pipe 300. The oil conveying device includes a support 10, an impeller 20, and a sealing structure 30. The support 10 has a first inlet 11, a second inlet 12, and a receiving cavity 13. Both the first inlet 11 and the second inlet 12 are connected to the receiving cavity 13, with the first inlet 11 located below the second inlet 12. The impeller 20 has a liquid passage hole 21a and is rotatably disposed within the receiving cavity 13 to convey oil entering the receiving cavity 13 to the oil inlet through the liquid passage hole 21a. The sealing structure 30 is movably disposed on the support 10. The oil conveying equipment has a first oil conveying state in which the sealing structure 30 blocks the first inlet 11 and a second oil conveying state in which the sealing structure 30 avoids the first inlet 11; when the oil level in the environment where the oil conveying equipment is located is greater than or equal to a preset oil level value, the oil conveying equipment is in the first oil conveying state.

[0033] Using the technical solution of this embodiment, an oil conveying device is provided at the oil inlet of the compressor oil suction pipe 300. The oil conveying device includes a support 10, an impeller 20 and a sealing structure 30. The impeller 20 is rotatably disposed in the receiving cavity 13 of the support 10. The oil entering the receiving cavity 13 is conveyed to the oil inlet through the liquid passage 21a of the impeller 20. The first liquid inlet 11 and the second liquid inlet 12 of the support 10 are both connected to the receiving cavity 13 and the first liquid inlet 11 is located below the second liquid inlet 12. The sealing structure 30 is movably disposed on the support 10 to block or avoid the first liquid inlet 11. Thus, when the oil level in the environment where the oil conveying equipment is located is less than the preset oil level, the compressor operates at a high frequency and has a strong pumping capacity. At this time, the oil conveying equipment is in a second oil conveying state. The sealing structure 30 avoids the first inlet 11, allowing the oil to be directly conveyed to the oil inlet through the first inlet 11. This prevents the impeller 20 from pressurizing the oil, causing excessive oil delivery and affecting the normal operation of the compressor, thereby improving the compressor's operational reliability. When the oil level in the environment where the oil conveying equipment is located is greater than or equal to the preset oil level... When the compressor is in a low-frequency operating condition, its oil pumping capacity is insufficient. At this time, the sealing structure 30 is in the first oil delivery state. The sealing structure 30 blocks the first liquid inlet 11. The oil that enters the receiving cavity 13 through the second liquid inlet 12 needs to be pressurized by the impeller 20 before being delivered to the oil inlet. This enhances the oil pumping capacity of the compressor under low-frequency operating conditions and ensures that the oil can lubricate the various moving parts in the compressor. This solves the problem of poor oil delivery capacity of the compressor's suction pipe 300 in the prior art and improves the operating reliability of the compressor.

[0034] like Figures 1 to 8As shown, the sealing structure 30 is vertically adjustable along the height of the support 10, allowing it to switch between a first oil delivery state and a second oil delivery state. This arrangement provides two oil delivery states for the oil delivery equipment, matching the pumping capacity of the compressor under different operating conditions and thus improving the reliability of the equipment. Furthermore, it simplifies and facilitates the switching between these states, reducing the processing difficulty for operators.

[0035] In this embodiment, when the blocking structure 30 descends along the height direction of the support 10 to block the first liquid inlet 11, the oil conveying device is in the first oil conveying state to enhance the pumping capacity of the compressor under low-frequency conditions; when the blocking structure 30 rises along the height direction of the support 10 to avoid the first liquid inlet, the oil conveying device is in the second oil conveying state to adapt to the pumping capacity of the compressor under high-frequency conditions.

[0036] Optionally, the support 10 has a first mating part, and the sealing structure 30 includes a sealing body 31 and a sealing part 32. The sealing body 31 has a second mating part, one of the first and second mating parts being a protrusion, and the other being a recess. The protrusion extends into the recess and can move up and down along the extension direction of the recess. The sealing part 32 is disposed on the sealing body 31 and extends into the first liquid inlet 11 to seal the first liquid inlet 11. In this way, the above arrangement, on the one hand, makes the up and down movement of the sealing structure 30 more stable and smooth through the first and second mating parts, thereby making the switching of oil delivery state faster and more stable, thus improving the stability of the oil delivery state switching of the oil delivery equipment; on the other hand, it makes the structure of the sealing structure 30 simple, easy to process and implement, thereby reducing the processing difficulty for workers. The extension direction of the recess is consistent with the height direction of the support 10 to ensure that the sealing structure 30 can move up and down along the height direction of the support 10.

[0037] In this embodiment, the first mating part is a protrusion and the second mating part is a recess. The first mating part of the bracket 10 extends into the second mating part of the sealing structure 30 so that the lifting and lowering movement of the sealing body 31 can be achieved by the sliding of the first mating part along the extension direction of the second mating part.

[0038] Specifically, the sealing part 32 is a protrusion adapted to the first liquid inlet 11. In this way, when the oil conveying equipment is in the first oil conveying state, the sealing part 32 extends into the first liquid inlet 11 and the outer peripheral surface of the sealing part 32 fits against the inner peripheral surface of the first liquid inlet 11 to seal the first liquid inlet 11, thereby improving the sealing reliability of the sealing structure 30.

[0039] like Figures 1 to 8As shown, a third inlet 14 is formed between the support 10 and the sealing structure 30. When the oil conveying equipment is in the second oil conveying state, the third inlet 14 is connected to the receiving cavity 13 through the first inlet 11. Thus, when the oil conveying equipment is in the second oil conveying state, oil can sequentially enter the inlet through the third inlet 14 and the first inlet 11 to achieve oil conveying. At the same time, the above arrangement simplifies the formation of the third inlet 14 and reduces the processing difficulty for workers.

[0040] In this embodiment, when the oil conveying equipment is in the second oil conveying state, the oil level in the environment where the oil conveying equipment is located is less than the preset oil level value, the compressor is in high-frequency operation, and the pumping capacity is strong. At this time, the oil flows into the gap formed between the sealing structure 30 and the bracket 10 through the third inlet 14, then flows into the first inlet 11, and then enters the oil inlet through the liquid passage 21a. This avoids the impeller pressurizing the oil, which could lead to excessive oil delivery and even affect the normal operation of the compressor, thereby improving the operating reliability of the compressor.

[0041] like Figure 3 and Figure 4 As shown, the support 10 includes a cylindrical body 15. The bottom of the cylindrical body 15 has a first liquid inlet 11, and the cylindrical body 15 has a second liquid inlet 12 and a first mating part, which is located between the first liquid inlet 11 and the second liquid inlet 12. This arrangement ensures that the first mating part, the first liquid inlet 11, and the second liquid inlet 12 do not interfere with each other, thus preventing the first mating part from affecting the entry of oil into the first liquid inlet 11 and the second liquid inlet 12, thereby making the oil flow smoother. Furthermore, it simplifies the structure of the support 10, making it easier to manufacture and implement, and reducing the processing difficulty for workers.

[0042] Optionally, there may be one second liquid inlet 12; or, there may be multiple second liquid inlets 12, spaced apart circumferentially along the cylindrical body 15; and / or, there may be one first mating part; or, there may be multiple first mating parts, spaced apart circumferentially along the cylindrical body 15. Thus, when there is only one second liquid inlet 12 and one first mating part, the structure of the cylindrical body 15 is simplified, thereby reducing the processing difficulty for workers. At the same time, the above arrangement allows for more flexible and diverse selection of the number of second liquid inlets 12 and first mating parts to adapt to different working conditions and usage requirements, and also improves the processing flexibility for workers.

[0043] Optionally, there is one second mating part; or, there are multiple second mating parts, which are arranged at intervals along the circumference of the sealing body 31, and the multiple second mating parts are arranged in a one-to-one correspondence with the multiple first mating parts.

[0044] In this embodiment, there are four second liquid inlets 12. The four second liquid inlets 12 can increase the liquid inlet area of ​​the cylindrical body 15, thereby increasing the amount of oil entering. This is to prevent the oil conveying equipment from being unable to deliver enough oil to the liquid inlet, which would affect the lubrication effect of the oil on the various parts inside the compressor, thereby improving the operational reliability of the compressor.

[0045] It should be noted that the number of second liquid inlets 12 is not limited to this and can be adjusted according to operating conditions and usage requirements. Optionally, the number of second liquid inlets 12 may be one, two, three, five, six, or more.

[0046] In this embodiment, there are four first mating parts. The four first mating parts can increase the mating area between the cylindrical body 15 and the sealing body 31, so that the lifting and lowering movement of the sealing body 31 is more stable, thereby improving the lifting and lowering reliability of the sealing body 31.

[0047] It should be noted that the number of first mating parts is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of first mating parts may be one, two, three, five, six, or more.

[0048] In this embodiment, there are four second mating parts, and the four second mating parts are set up one-to-one with the four first mating parts.

[0049] It should be noted that the number of second mating parts is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of second mating parts may be one, two, three, five, six, or more.

[0050] like Figures 1 to 8 As shown, the impeller 20 includes a cylinder 21 and multiple inclined blades 22. The cylinder 21 has a liquid passage hole 21a and is used to connect to the oil suction pipe 300 for synchronous rotation. Multiple inclined blades 22 are arranged on the outer circumferential surface of the cylinder 21 and spaced apart circumferentially, with a liquid passage gap formed between each pair of adjacent inclined blades 22. When the oil conveying equipment is in the first oil conveying state, the oil sequentially enters the oil suction pipe 300 through the second inlet 12, the liquid passage gap, and the liquid passage hole 21a. Thus, the above arrangement achieves oil conveying through the second inlet 12, the liquid passage gap, and the liquid passage hole 21a; on the other hand, the impeller 20 can pressurize the oil to increase its flow rate, volume, and conveying pressure, thereby improving the compressor's oil pumping capacity.

[0051] In this embodiment, when the oil level in the environment where the oil conveying equipment is located is greater than or equal to a preset oil level value, the compressor is in a low-frequency operating condition and its pumping capacity is insufficient. At this time, the sealing structure 30 is in the first oil conveying state, and the sealing structure 30 blocks the first inlet 11, so that the oil can only flow sequentially through the second inlet 12, the liquid passage gap, and the liquid passage hole 21a into the suction pipe 300. During the rotation of the impeller 20, the flow rate, flow volume, and conveying pressure of the oil can be increased. This not only supplements the pumping capacity of the compressor under low-frequency operating conditions, but also ensures that the oil entering the compressor is high-pressure oil, thereby enabling the oil to fully lubricate the internal parts of the compressor and improve the operational reliability of the compressor.

[0052] In other embodiments not shown in the accompanying drawings, the oil conveying equipment further includes a drive device connected to the sealing structure to drive the sealing structure to move up and down. Thus, the above arrangement, by driving the sealing structure to move up and down via the drive device, ensures that the sealing structure can move up and down in a timely manner to switch the oil conveying state of the oil conveying equipment, thereby making the state switching of the oil conveying equipment faster and more accurate.

[0053] Optionally, the drive unit is a linear motor.

[0054] In this embodiment, the density of the sealing structure 30 is less than that of the oil. When the oil level in the environment where the oil conveying equipment is located is greater than or equal to a preset oil level, the buoyancy exerted by the oil on the sealing structure 30 pushes it to block the first inlet 11. Thus, the different densities of the sealing structure 30 and the oil allow the sealing structure 30 to rise and fall by buoyancy, enabling switching between different oil conveying states. This simplifies the structure of the oil conveying equipment, reducing its processing costs and the difficulty of processing for workers. Simultaneously, the above arrangement uses oil buoyancy to raise the sealing structure 30, ensuring it can block the first inlet 11 without requiring an additional drive device, thus reducing compressor energy consumption.

[0055] Specifically, as the oil level in the environment where the oil conveying equipment is located continuously rises, the sealing structure 30 rises continuously under the action of buoyancy until the oil level in the environment where the oil conveying equipment is located is greater than or equal to the preset oil level value. At this point, the sealing structure 30 blocks the first inlet, and the oil conveying equipment is in the first oil conveying state. As the oil level in the environment where the oil conveying equipment is located continuously decreases, the sealing structure 30 floating on the oil level decreases accordingly until the sealing structure 30 avoids the first inlet 11, so that the oil conveying equipment is in the second oil conveying state.

[0056] like Figure 9As shown, this application also provides a compressor, which includes a housing 200, an oil suction pipe 300, a compressor body 400, a lower flange 500, and an oil conveying device 100. The oil suction pipe 300, the compressor body 400, the lower flange 500, and the oil conveying device 100 are all disposed within the housing 200. The oil conveying device 100 is located below the lower flange 500, and the support 10 of the oil conveying device 100 is connected to the lower flange 500. The oil conveying device 100 is the aforementioned oil conveying device.

[0057] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0058] An oil conveying device is provided at the oil inlet of the compressor's oil suction pipe. The oil conveying device includes a support, an impeller, and a sealing structure. The impeller is rotatably mounted in the receiving cavity of the support. The oil entering the receiving cavity is conveyed to the oil inlet through the liquid passage of the impeller. The first liquid inlet and the second liquid inlet of the support are both connected to the receiving cavity, and the first liquid inlet is located below the second liquid inlet. The sealing structure is movably mounted on the support to block or avoid the first liquid inlet. In this way, when the oil level in the environment where the oil conveying equipment is located is less than the preset oil level, the compressor operates at a high frequency and has a strong oil pumping capacity. At this time, the oil conveying equipment is in the second oil conveying state. The sealing structure avoids the first inlet, allowing the oil to be directly conveyed to the oil inlet through the first inlet. This avoids the impeller pressurizing the oil, which could lead to excessive oil delivery and affect the normal operation of the compressor, thereby improving the compressor's operational reliability. When the oil level in the environment where the oil conveying equipment is located is greater than or equal to the preset oil level, the compressor operates at a low frequency and has insufficient oil pumping capacity. At this time, the sealing structure is in the first oil conveying state. The sealing structure blocks the first inlet, and the oil entering the receiving cavity through the second inlet needs to be pressurized by the impeller before being conveyed to the oil inlet. This enhances the compressor's oil pumping capacity under low-frequency conditions, ensuring that the oil can lubricate all moving parts within the compressor. This solves the problem of poor lubricating oil delivery capacity of the compressor's suction pipe in the prior art, and improves the compressor's operational reliability.

[0059] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0060] 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.

[0061] It should be noted that the terms "first," "second," etc., used 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 in sequences other than those illustrated or described herein.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil conveying device, located at the oil inlet of an oil suction pipe, characterized in that, The oil conveying equipment includes: The support (10) has a first liquid inlet (11), a second liquid inlet (12) and a receiving cavity (13). The first liquid inlet (11) and the second liquid inlet (12) are both connected to the receiving cavity (13). The first liquid inlet (11) is located below the second liquid inlet (12). Impeller (20) has a liquid passage hole (21a) and is rotatably disposed in the receiving cavity (13) for conveying oil entering the receiving cavity (13) to the oil inlet via the liquid passage hole (21a); The sealing structure (30) is movably mounted on the bracket (10); The oil conveying device has a first oil conveying state in which the sealing structure (30) blocks the first inlet (11) and a second oil conveying state in which the sealing structure (30) avoids the first inlet (11); when the oil level in the environment where the oil conveying device is located is greater than or equal to a preset oil level value, the oil conveying device is in the first oil conveying state.

2. The oil conveying equipment according to claim 1, characterized in that, The sealing structure (30) is vertically and vertically arranged along the height direction of the bracket (10) so that the sealing structure (30) can switch between the first oil delivery state and the second oil delivery state.

3. The oil conveying equipment according to claim 1, characterized in that, The bracket (10) has a first mating part, and the sealing structure (30) includes: The sealing body (31) has a second mating part, one of the first mating part and the second mating part is a convex part, and the other of the first mating part and the second mating part is a concave part. The convex part extends into the concave part and can move up and down along the extending direction of the concave part. A sealing part (32) is disposed on the sealing body (31), and the sealing part (32) extends into the first liquid inlet (11) to seal the first liquid inlet (11).

4. The oil conveying equipment according to claim 1, characterized in that, A third inlet (14) is formed between the bracket (10) and the sealing structure (30). When the oil conveying equipment is in the second oil conveying state, the third inlet (14) is connected to the receiving cavity (13) through the first inlet (11).

5. The oil conveying equipment according to claim 3, characterized in that, The support (10) includes: The cylindrical body (15) has a first liquid inlet (11) at the bottom and a second liquid inlet (12) and a first mating part on the wall of the cylindrical body (15). The first mating part is located between the first liquid inlet (11) and the second liquid inlet (12).

6. The oil conveying equipment according to claim 5, characterized in that, The second liquid inlet (12) is one; or, the second liquid inlet (12) is multiple, and the multiple second liquid inlets (12) are arranged at intervals along the circumference of the cylindrical body (15); and / or, The first mating part is one; or, the first mating part is multiple, and the multiple first mating parts are arranged at intervals along the circumference of the cylindrical body (15).

7. The oil conveying equipment according to claim 1, characterized in that, The impeller (20) includes: The cylinder (21) has the liquid passage hole (21a) and the cylinder (21) is used to connect with the oil suction pipe (300) to rotate synchronously; Multiple inclined blades (22) are arranged on the outer circumferential surface of the cylinder (21) and spaced apart along the circumference of the cylinder (21). A liquid passage gap is formed between each two adjacent inclined blades (22). When the oil conveying equipment is in the first oil conveying state, the oil enters the oil suction pipe (300) sequentially through the second inlet (12), the liquid passage gap and the liquid passage hole (21a).

8. The oil conveying equipment according to claim 1, characterized in that, The oil conveying equipment also includes: A driving device is connected to the sealing structure (30) to drive the sealing structure (30) to move up and down.

9. The oil conveying equipment according to claim 1, characterized in that, The density of the sealing structure (30) is less than that of the oil. When the oil level in the environment where the oil conveying equipment is located is greater than or equal to a preset oil level value, the sealing structure (30) is pushed to block the first inlet (11) by the buoyancy applied by the oil to the sealing structure (30).

10. A compressor, characterized in that, The device includes a housing (200), an oil suction pipe (300), a compressor body (400), a lower flange (500), and an oil conveying device (100). The oil suction pipe (300), the compressor body (400), the lower flange (500), and the oil conveying device (100) are all disposed inside the housing (200). The oil conveying device (100) is located below the lower flange (500), and the support (10) of the oil conveying device (100) is connected to the lower flange (500). The oil conveying device (100) is the oil conveying device according to any one of claims 1 to 9.

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