Compressor and oil discharge structure thereof

Abstract

The invention provides a compressor and an oil discharge structure thereof. The oil discharge structure of the compressor comprises a bearing installed on a crankshaft, the bearing is provided with a first exhaust hole and an exhaust valve plate, the exhaust valve plate comprises a movable end and a fixed end, the fixed end is fixed to the bearing, the movable end moves to open and close the first exhaust hole, and the bearing is further provided with at least one oil discharge hole. The oil discharge hole is formed in the side, close to the oil pool, of the first exhaust hole, and the height of the center point of the oil discharge hole is smaller than that of the lowest point of the moving end of the exhaust valve plate. The oil discharge hole is formed below the moving end of the exhaust valve plate, lubricating oil accumulated in a cavity is discharged into an oil pool of the compressor through the oil discharge hole by means of the pressure difference between the interior and the exterior of the cavity formed by the bearing and the silencer, effective circulation of engine oil is achieved, and the utilization rate is increased; and the exhaust valve plate can be prevented from making contact with lubricating oil in the moving process, the possibility that the exhaust valve plate flaps the lubricating oil and generates noise is reduced, and the working reliability of the compressor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a compressor and an oil discharge structure thereof. Background Art

[0002] The hermetic compressor includes a motor that is arranged inside a sealed housing and can generate a driving force, and a compression component connected to the motor for compressing the refrigerant. The hermetic compressor can be classified into a reciprocating compressor, a vortex compressor, and a rolling rotor compressor according to the different structures of the refrigerant compressor.

[0003] During the operation of the compressor, it will periodically perform the process of suction, compression and exhaust. For example, when the compressor is running, the rotation of the crankshaft drives the piston in the cylinder to rotate and the blades to reciprocate, and then the low-pressure refrigerant in the cylinder is compressed into high-pressure refrigerant; when the cavity pressure in the cylinder is greater than the exhaust pressure, the high-pressure refrigerant opens the exhaust valve plate through the exhaust port to exhaust, and after the exhaust is completed, the valve plate will close to close the exhaust port, thus completing the suction, compression and exhaust process.

[0004] In existing horizontal compressors, the exhaust valve plates are usually arranged in the lower area of ​​the compressor, and these exhaust valve plates are fixed on the bearings, and the bearings are connected to a closed muffler. Therefore, the exhaust valve plates are placed in a sealed space defined by the bearing surface and the muffler cavity.

[0005] In order to ensure the lubrication of the pump body parts inside the compressor, extend the service life of the internal parts, and maintain the normal operation of the compressor, a certain amount of refrigeration oil needs to be injected into the compressor through the tail of the muffler. In some cases, if the oil level is not set properly, the valve plate may be adversely affected by the refrigeration oil during the opening process. In addition, if the amount of oil added is not large, the oil may form residues in the sealed space formed by the muffler and the bearing before entering the pump body. This residual oil will not only affect the life and reliability of the exhaust valve plate, but may also cause abnormal vibration and noise problems, which will have a negative impact on the performance and noise of the compressor.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include prior art information that is not known to those skilled in the art. Summary of the invention

[0007] In view of the problems in the prior art, the purpose of the present invention is to provide a compressor and its oil discharge structure, which can discharge the excess lubricating oil at the bottom of the exhaust valve plate in time, reduce the influence of the lubricating oil on the exhaust valve plate, and improve the working reliability of the compressor.

[0008] An embodiment of the present invention provides an oil discharge structure of a compressor, comprising a bearing mounted on a crankshaft, wherein the bearing is provided with a first exhaust hole and an exhaust valve plate, wherein the exhaust valve plate comprises a moving end and a fixed end, wherein the fixed end is fixed on the bearing, and the moving end moves to open and close the first exhaust hole, and the bearing is further provided with at least one oil discharge hole, wherein the oil discharge hole is arranged on a side of the first exhaust hole close to an oil pool, and wherein a height of a center point of the oil discharge hole is lower than a height of the moving end of the exhaust valve plate.

[0009] In some embodiments, the oil drain hole is semicircular in shape.

[0010] In some embodiments, the radius of the oil drain hole is less than or equal to 2 mm.

[0011] In some embodiments, the edge of the oil drain hole is a chamfered structure.

[0012] In some embodiments, the chamfer angle of the chamfered structure is not less than 60°.

[0013] In some embodiments, an exhaust valve seat is provided on the bearing, and a fixed end of the exhaust valve plate is fixed on the exhaust valve seat.

[0014] In some embodiments, a muffler is provided at one end of the bearing close to the exhaust valve plate, the muffler and the bearing together form a muffler cavity, and the oil drain hole is communicated with the muffler cavity.

[0015] In some embodiments, a second exhaust hole is further provided on the bearing or the muffler.

[0016] An embodiment of the present invention further provides a compressor, comprising the oil discharge structure for the compressor as described above.

[0017] In some embodiments, the compressor is a horizontal compressor.

[0018] The compressor and the oil discharge structure thereof provided by the present invention have the following advantages:

[0019] In the technical solution of the present invention, the oil drain hole is arranged in the lower area of ​​the exhaust valve plate, and the lowest point of the moving end of the exhaust valve plate is higher than the center position of the oil drain hole. When lubricating oil is stored in the cavity area formed by the bearing and the muffler, it can be discharged through the oil filling hole in time, reducing the possibility that the exhaust valve plate is affected by the lubricating oil; it can also prevent the lubricating oil level from being too high, thereby preventing the lubricating oil level from submerging the moving end of the exhaust valve plate, further protecting the performance of the exhaust valve plate; avoiding the exhaust valve plate from contacting the lubricating oil during movement, protecting the exhaust valve plate from damage, and reducing the possibility and noise caused by the exhaust valve plate hitting the lubricating oil, thereby improving the reliability of the compressor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0021] Figure 1 is a schematic diagram of a bearing of a compressor according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the bearing cut along the AA section line.

[0023] Reference numerals:

[0024] 100 Bearing 200 Exhaust valve

[0025] 10 Oil drain hole 210 Fixed end

[0026] 11 Chamfer structure 220 motion end DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0028] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] It should be further understood that the terms "comprises" and "includes" indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0031] In order to solve the problems in the prior art, an embodiment of the present invention provides an oil discharge structure of a compressor, including a bearing installed on a crankshaft, the bearing being provided with a first exhaust hole and an exhaust valve plate, the exhaust valve plate including a moving end and a fixed end, the fixed end being fixed on the bearing, the moving end moving to open and close the first exhaust hole, and the bearing being further provided with at least one oil discharge hole, the oil discharge hole being arranged on a side of the first exhaust hole close to the oil pool, and the height of the oil discharge hole being lower than the height of the moving end of the exhaust valve plate. The technical solution of the present invention sets the height of the center point of the oil drain hole to be lower than the lowest point of the moving end of the exhaust valve plate. When lubricating oil is stored in the cavity area formed by the bearing and the muffler, the pressure difference between the inside and outside of the cavity can be used to discharge the stored lubricating oil in time and discharge it into the oil pool of the compressor, thereby realizing effective circulation of the engine oil and improving the utilization rate; it can also prevent the lubricating oil level from being too high, thereby preventing the lubricating oil level from submerging the moving end of the exhaust valve plate, and further protecting the performance of the exhaust valve plate; it prevents the exhaust valve plate from contacting the lubricating oil during movement, protects the exhaust valve plate from damage, and reduces the possibility and noise caused by the exhaust valve plate hitting the lubricating oil, thereby improving the reliability of the compressor operation.

[0032] The oil discharge structure of the compressor provided by the embodiment of the present invention will be explained in detail below with reference to the accompanying drawings. Figure 1 A schematic diagram of a bearing of a compressor provided by an embodiment of the present invention is shown; Figure 2 Shows Figure 1 Schematic diagram of the bearing cut along the AA section line.

[0033] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides an oil discharge structure of a compressor, including a bearing 100 installed on a crankshaft, the bearing 100 is provided with a first exhaust hole (not shown in the figure), an oil discharge hole 10 and an exhaust valve plate 200 for opening and closing the first exhaust hole, the exhaust valve plate 200 includes a movable end 220 and a fixed end 210, the oil discharge hole 10 is provided on a side of the first exhaust hole close to the oil pool, and the lowest position of the movable end 220 of the exhaust valve plate 200 is not lower than the center position of the oil discharge hole 10. Figure 1 The middle oil drain hole 10 is located at the edge of the bearing 100 .

[0034] According to the technical solution of the present invention, the oil drain hole 10 is arranged in the lower area of ​​the exhaust valve plate 200, and the lowest point of the moving end 220 of the exhaust valve plate 200 is higher than the center position of the oil drain hole 10. When lubricating oil is stored in the cavity area formed by the bearing 100 and the muffler, the lubricating oil can be discharged into the oil pool of the compressor through the oil filling hole 20 in time, thereby reducing the possibility that the exhaust valve plate 200 is affected by the lubricating oil; avoiding the lubricating oil level being too high, thereby preventing the lubricating oil level from submerging the moving end 220 of the exhaust valve plate 200, and further protecting the performance of the exhaust valve plate 200; avoiding the exhaust valve plate 200 from contacting the lubricating oil during movement, reducing the possibility and noise caused by the exhaust valve plate 200 hitting the lubricating oil, and improving the reliability of the compressor operation.

[0035] In some embodiments, the number of the oil drain holes 10 is greater than or equal to 1. Figure 2 As shown, the number of the oil drain hole 10 in this embodiment is 1. In other embodiments, two or more oil drain holes 10 are provided on the bearing 100. The increase in the number of oil drain holes 10 can improve the oil drain efficiency of the oil drain structure.

[0036] Furthermore, when there are multiple oil drain holes 10, the multiple oil drain holes 10 can be arranged at equal intervals, located at the same height on the bearing 100, or arranged at intervals along the circumference of the bearing 100. The specific number of the oil drain holes 10 and the location of the oil drain holes 10 on the bearing 100 are only for illustration and are not specifically limited. Those skilled in the art can reasonably set them according to actual needs.

[0037] Furthermore, if Figure 1 As shown, in the embodiment of the present invention, the shape of the oil drain hole 10 is semicircular. Further, in some embodiments, the radius of the oil drain hole 10 is less than or equal to 2 mm, and illustratively, the radius of the oil drain hole 10 is 1 mm, 1.2 mm, 1.4 mm, 1.6 mm or 1.8 mm. By utilizing the pressure difference between the inside and outside of the cavity formed by the bearing 100 and the muffler, the lubricating oil in the cavity can be discharged through the oil drain hole 10 and discharged into the oil pool of the compressor, thereby achieving effective circulation of the lubricating oil and improving the utilization rate.

[0038] In other embodiments, the shape of the oil drain hole 10 may also be set to be circular, elliptical, etc., which is not specifically limited here.

[0039] Furthermore, if Figure 2 As shown, in the embodiment of the present invention, the edge of the oil drain hole 10 is set as a chamfered structure 11. The edge of the oil drain hole 10 is a chamfered structure, which can form a drainage port, facilitate the discharge of lubricating oil, and improve the smoothness of oil discharge. The chamfered structure 11 in this embodiment can be any one of a rounded corner, a one-way chamfer, and a two-way chamfer, but is not limited to a rounded corner, a one-way chamfer, and a two-way chamfer, and can also be other shapes. Those skilled in the art can set the specific structure of the chamfered structure 11 according to actual needs.

[0040] Furthermore, the chamfer of the chamfer structure 11 is not less than 60°. The size of the chamfer is not limited to the above example, and those skilled in the art can set it according to actual needs.

[0041] Furthermore, an exhaust valve seat (not shown in the figure) is provided on the bearing 100, and the fixed end of the exhaust valve plate 200 is fixed on the exhaust valve seat. Specifically, the fixed ends of the bearing 100 and the exhaust valve plate 200 are both provided with through holes, and a bolt passes through the through holes on the bearing 100 and the exhaust valve plate 200, thereby fixing the exhaust valve plate 200 to the exhaust valve seat.

[0042] Furthermore, a muffler (not shown) is provided at one end of the bearing 100 close to the exhaust valve plate 200 , and the muffler and the bearing 100 together form a muffler cavity, and the oil drain hole 10 is connected to the muffler cavity.

[0043] Furthermore, a second exhaust hole is provided on the bearing 100 or the muffler, and the high-pressure gas silenced by the muffler cavity is discharged from the second exhaust hole and then enters the refrigeration or heating cycle system.

[0044] An embodiment of the present invention further provides a compressor, comprising the above-mentioned oil discharge structure for a compressor. Further, in some embodiments, the compressor is a horizontal compressor.

[0045] Specifically, for example, the horizontal compressor in the embodiment of the present invention includes a pump body structure composed of a crankshaft, a bearing 100, an exhaust valve plate 200, a muffler, a cylinder and other parts. After the refrigerant in the cylinder is compressed to a certain pressure, the exhaust valve plate 200 assembled on the bearing 100 is opened, and the refrigerant is discharged from the first exhaust hole of the bearing 100 into the muffler cavity composed of the bearing 100 and the muffler cavity, and then discharged from the second exhaust hole after muffler. The pressure difference between the inside and outside of the muffler cavity will cause the lubricating oil in it to be discharged out of the muffler cavity through the oil drain hole 10. The oil drain hole 10 is located below the moving end of the exhaust valve plate 200. Therefore, the lubricating oil stored in the muffler cavity will be discharged in time when it exceeds the height of the oil drain hole 10, so as to avoid the lubricating oil level being too high, prevent the lubricating oil level from submerging the moving end of the exhaust valve plate, reduce the influence of the lubricating oil on the exhaust valve plate 200, and protect the exhaust valve plate 200, reduce the possibility and noise generated by the exhaust valve plate 200 hitting the lubricating oil, and improve the reliability of the compressor operation.

[0046] In summary, the compressor and the oil discharge structure thereof provided by the present invention have the following advantages:

[0047] The technical solution of the present invention is to set the oil drain hole in the lower area of ​​the exhaust valve plate, and the lowest point of the moving end of the exhaust valve plate is higher than the center position of the oil drain hole. When lubricating oil is stored in the cavity area formed by the bearing and the muffler, the oil can be discharged in time through the oil filling hole, thereby reducing the possibility that the exhaust valve plate is affected by the lubricating oil; avoiding the lubricating oil level being too high, thereby preventing the lubricating oil level from submerging the moving end of the exhaust valve plate, and further protecting the performance of the exhaust valve plate; avoiding the exhaust valve plate from contacting the lubricating oil during movement, protecting the exhaust valve plate from damage, and reducing the possibility and noise caused by the exhaust valve plate hitting the lubricating oil, thereby improving the reliability of the compressor operation.

[0048] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An oil discharge structure of a compressor, comprising a bearing mounted on a crankshaft, wherein the bearing is provided with a first exhaust hole and an exhaust valve plate, wherein the exhaust valve plate comprises a moving end and a fixed end, wherein the fixed end is fixed on the bearing, and the moving end moves to open and close the first exhaust hole, wherein: The bearing is further provided with at least one oil drain hole, which is provided on a side of the first exhaust hole close to the oil pool, and the height of the center point of the oil drain hole is lower than the height of the moving end of the exhaust valve plate.

2. The oil discharge structure of the compressor according to claim 1, characterized in that: The shape of the oil drain hole is semicircular.

3. The oil discharge structure of the compressor according to claim 2, characterized in that: The radius of the oil drain hole is less than or equal to 2 mm.

4. The oil discharge structure of the compressor according to claim 2, characterized in that: The edge of the oil drain hole is a chamfered structure.

5. The oil discharge structure of the compressor according to claim 4, characterized in that: The chamfer angle of the chamfered structure is not less than 60°.

6. The oil discharge structure of the compressor according to claim 1, characterized in that: An exhaust valve seat is arranged on the bearing, and a fixed end of the exhaust valve sheet is fixed on the exhaust valve seat.

7. The oil discharge structure of the compressor according to claim 1, characterized in that: A muffler is provided at one end of the bearing close to the exhaust valve plate. The muffler and the bearing are combined to form a muffler cavity. The oil drain hole is communicated with the muffler cavity.

8. The oil discharge structure of the compressor according to claim 7, characterized in that: The bearing or the muffler is also provided with a second exhaust hole.

9. A compressor, characterized in that: The invention comprises an oil discharge structure of a compressor as claimed in any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that The compressor is a horizontal compressor.

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