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 an 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 exhaust hole, the bearing further comprises a through hole, and the through hole is formed in the side, close to an oil pool, of the bearing. The position of the lowest point of the moving end of the exhaust valve plate is not lower than the center position of the through hole. The through hole is formed in the position not exceeding the lowest point of the moving end of the exhaust valve plate, so that when compressed high-pressure gas is exhausted through the exhaust hole, lubricating oil accumulated near the exhaust valve plate can be taken away, and the possibility that the exhaust valve plate can be influenced by the lubricating oil is reduced; the liquid level of the lubricating oil can be prevented from being too high to submerge the moving end of the exhaust valve plate, the exhaust valve plate is prevented from making contact with the lubricating oil in the moving process, the valve plate is protected against damage, and the possibility and noise generated when the valve plate strikes the lubricating oil are reduced.

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, the bearing being provided with an exhaust hole and an exhaust valve plate, the exhaust valve plate comprising a moving end and a fixed end, the fixed end being fixed on the bearing, the moving end moving to open and close the exhaust hole, the bearing further comprising a through hole, the through hole being provided on a side of the bearing close to an oil pool, the position of the lowest point of the moving end of the exhaust valve plate being not lower than the center position of the through hole.

[0009] In some embodiments, the number of the through holes is greater than or equal to one.

[0010] In some embodiments, the plurality of through holes are arranged at equal intervals.

[0011] In some embodiments, the plurality of through holes are equidistant from the top of the oil pool.

[0012] In some embodiments, the distances between the center points of the plurality of through holes and the center of the bearing are the same.

[0013] In some embodiments, an exhaust valve seat is further 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 through hole is communicated with the muffler cavity.

[0015] In some embodiments, the muffler is further provided with an oil filling hole, and the oil filling hole is connected to the oil pool through a connecting pipe.

[0016] An embodiment of the present invention further provides a compressor, comprising the oil discharge structure of 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] The technical solution of the present invention, by arranging the through hole at a position not exceeding the lowest point of the moving end of the exhaust valve plate, can enable the compressed high-pressure gas to be discharged from the silencer cavity formed by the bearing and the silencer through the exhaust hole, and can also take away the lubricating oil accumulated near the exhaust valve plate, thereby reducing the possibility that the exhaust valve plate can be affected by the lubricating oil; it can also prevent the lubricating oil level from being too high to submerge the moving end of the exhaust valve plate, thereby preventing the exhaust valve plate from contacting the lubricating oil during movement, thereby 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 Exhaust hole 210 Fixed end

[0026] 20 through hole 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] As described in the background technology, excessive amount of lubricating oil in the cavity formed by the bearing and the muffler may cause abnormal opening of the exhaust valve plate, and may cause lubricating oil to remain in the cavity formed by the bearing and the muffler, affecting the life and reliability of the exhaust valve plate and causing abnormal vibration and noise problems. To solve this problem, an embodiment of the present invention provides an oil discharge structure of a compressor, including a bearing mounted on a crankshaft, the bearing being provided with an 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 exhaust hole, the bearing also including a through hole, the through hole being provided on a side of the bearing close to the oil pool, and the lowest point of the moving end of the exhaust valve plate is not lower than the center position of the through hole. The technical solution of the present invention, by arranging the through hole at a position not exceeding the lowest point of the moving end of the exhaust valve plate, can enable the compressed high-pressure gas to be discharged from the silencer cavity formed by the bearing and the silencer through the exhaust hole, and can also take away the lubricating oil accumulated near the exhaust valve plate, thereby reducing the possibility that the exhaust valve plate can be affected by the lubricating oil; it can also prevent the lubricating oil level from being too high to submerge the moving end of the exhaust valve plate, thereby preventing the exhaust valve plate from contacting the lubricating oil during movement, thereby 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.

[0032] The oil discharge structure of the compressor provided by the embodiment of the present invention will be explained 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 Show 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 an exhaust hole 10, a through hole 20 and an exhaust valve plate 200 for opening and closing the exhaust hole 10, the exhaust valve plate 200 includes a moving end 220 and a fixed end 210, the through hole 20 is provided on a side of the exhaust hole 10 close to the oil pool, and the lowest position of the moving end 220 of the exhaust valve plate 200 is not lower than the center position of the through hole 20.

[0034] By arranging the through hole 20 at a position not exceeding the lowest point of the moving end 220 of the exhaust valve plate 200, when the compressed high-pressure gas is discharged from the silencer cavity formed by the bearing 100 and the silencer through the exhaust hole 10, the lubricating oil accumulated near the exhaust valve plate 200 can also be taken away, thereby reducing the possibility that the exhaust valve plate 200 can be affected by the lubricating oil; it can also prevent the lubricating oil level from being too high to submerge the moving end 220 of the exhaust valve plate 200, thereby preventing the exhaust valve plate 200 from contacting the lubricating oil during movement, thereby protecting the exhaust valve plate 200 from damage, and reducing the possibility and noise caused by the exhaust valve plate 200 hitting the lubricating oil, thereby improving the reliability of the compressor operation.

[0035] In some embodiments, the number of through holes 20 is greater than or equal to 1. Figure 2 As shown, the number of through holes 20 in this embodiment is 1. In other embodiments, two through holes 20 or more through holes 20 are provided on the bearing 100. The increase in the number of through holes 20 can improve the exhaust efficiency of the oil exhaust structure. The specific number of through holes 20 can be set by those skilled in the art according to actual needs and is not specifically limited here.

[0036] Further, in some embodiments, when there are multiple through holes 20, the multiple through holes 20 can be arranged at equal intervals, reducing the difficulty of processing the multiple through holes 20 and improving the processing efficiency of setting the through holes 20. In other embodiments, when there are multiple through holes 20, the multiple through holes 30 can be set to be at an equal distance from the top of the oil pool, that is, the multiple through holes 20 are located at the same height. In another embodiment, when there are multiple through holes 20, it can be set that the center points of the multiple through holes 30 are at the same distance from the center of the bearing, that is, the through holes 30 are distributed and arranged on an arc. In another embodiment of the present invention, the shape of the through hole 20 can also be set according to actual needs, such as circular, square or elliptical. The above arrangement position, spacing distance, shape, etc. of the multiple through holes 20 are only for illustrative purposes and are not specifically limited. Those skilled in the art can set them according to actual needs. This is only for illustrative purposes and is not specifically limited.

[0037] Furthermore, an exhaust valve seat (not shown in the figure) is also provided on the bearing 100, and the fixed end 210 of the exhaust valve plate 200 is fixed on the exhaust valve seat. Specifically, the bearing 100 and the fixed end 210 of 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.

[0038] Furthermore, a silencer (not shown in the figure) is provided at one end of the bearing 100 close to the exhaust valve plate 200. The silencer and the bearing 100 are enclosed to form a silencer cavity, and the through hole 20 is connected to the silencer cavity. The high-pressure gas compressed by the pump body of the compressor can open the exhaust valve plate 200, and then enter the silencer cavity for noise reduction, and finally be discharged from the silencer cavity through the through hole 20 and enter the refrigeration or heating system. The position of the through hole 20 is lower than the lowest point of the movement of the moving end 220 of the exhaust valve plate 200, which can reduce the residual refrigeration oil in the silencer cavity, thereby ensuring the internal cavity volume of the silencer cavity and stabilizing the silencer performance of the silencer.

[0039] Furthermore, in some embodiments, the muffler is provided with an oil filling hole, which is connected to the oil pool through a connecting pipe. The refrigeration oil in the oil pool enters the contact area between the crankshaft and the bearing 100 through the connecting pipe and the oil filling hole, and can lubricate the crankshaft and the bearing 100 when the compressor is running.

[0040] The embodiment of the present invention further provides a compressor, comprising the above-mentioned compressor oil discharge structure. Further, the compressor is a horizontal compressor.

[0041] Specifically, 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 reach a certain pressure, the exhaust valve plate 200 assembled on the bearing 100 is opened, and the refrigerant is discharged from the exhaust hole 10 of the bearing 100 into the cavity area composed of the bearing 100 and the muffler cavity, and then discharged to the outside of the muffler cavity through the through hole 20. Since the through hole 20 is below the exhaust valve plate 200, when the compressed high-pressure gas is discharged through the through hole 20, the lubricating oil accumulated near the exhaust valve plate 200 can also be taken away, thereby reducing the possibility of the exhaust valve plate 200 being affected by the lubricating oil, avoiding the lubricating oil level from being too high, preventing the lubricating oil level from submerging the moving end 220 of the exhaust valve plate 200, reducing the influence of the lubricating oil on the exhaust valve plate 200 and protecting the exhaust valve plate 200, and reducing the possibility and noise generated by the exhaust valve plate 200 hitting the lubricating oil.

[0042] In summary, the compressor and the oil discharge structure thereof provided by the present invention have the following advantages:

[0043] According to the technical solution of the present invention, the exhaust channel is arranged in the lower area of ​​the exhaust valve plate, so that the compressed high-pressure gas is discharged through the exhaust hole, and at the same time, the lubricating oil accumulated near the exhaust valve plate can be taken away, thereby reducing the possibility that the valve plate can be 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 valve plate, and further protecting the possibility and performance of the exhaust valve plate; avoiding the exhaust valve plate from contacting the lubricating oil during movement, thereby 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.

[0044] 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 an 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 exhaust hole, wherein: The bearing is also provided with a through hole, which is arranged on a side of the bearing close to the oil pool, and the position of the lowest point of the moving end of the exhaust valve plate is not lower than the center position of the through hole.

2. The oil discharge structure of the compressor according to claim 1, characterized in that: The number of the through holes is greater than or equal to one.

3. The oil discharge structure of the compressor according to claim 2, characterized in that: The plurality of through holes are arranged at equal intervals.

4. The oil discharge structure of the compressor according to claim 2, characterized in that: The distances between the plurality of through holes and the top of the oil pool are equal.

5. The oil discharge structure of the compressor according to claim 2, characterized in that: The distances between the center points of the plurality of through holes and the center of the bearing are the same.

6. The oil discharge structure of the compressor according to claim 1, characterized in that: An exhaust valve seat is also provided on the bearing, and the 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 through hole is communicated with the muffler cavity.

8. The oil discharge structure of the compressor according to claim 7, characterized in that: The muffler is also provided with an oil filling hole, and the oil filling hole is connected to the oil pool through a connecting pipe.

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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