An oil pump for a compressor is provided. The oil pump includes a pump body coupled to a driving shaft, and a pumping member coupled to the pump body so as to define a pumping part and a pump cover is coupled to a lower side of the pump body therebetween. A lower suction unit provided at a lower sid
An oil pump for a compressor is provided. The oil pump includes a pump body coupled to a driving shaft, and a pumping member coupled to the pump body so as to define a pumping part and a pump cover is coupled to a lower side of the pump body therebetween. A lower suction unit provided at a lower side of the pump body draws fluid into the pump from a lower portion of a supply area, and an upper suction unit draws fluid into the pump from an upper portion of the oil supply area.
대표청구항▼
What is claimed is: 1. An oil pump for a compressor including a casing having a fluid storage area formed therein, the oil pump comprising: a pump body coupled to a drive shaft; a pumping member coupled to the pump body so as to define a pumping part therebetween; a pump cover coupled to a lower si
What is claimed is: 1. An oil pump for a compressor including a casing having a fluid storage area formed therein, the oil pump comprising: a pump body coupled to a drive shaft; a pumping member coupled to the pump body so as to define a pumping part therebetween; a pump cover coupled to a lower side of the pump body, the pump cover including a lower suction unit having at least one passage formed therein, wherein the lower suction unit draws in fluid stored in the storage area through the at least one passage formed therein; and an upper suction unit positioned above the lower suction unit, the upper suction unit having at least one passage formed therein, wherein the upper suction unit draws in fluid stored in the storage area through the at least one passage formed therein. 2. The oil pump of claim 1, wherein the upper suction unit and the lower suction unit each draw fluid in from a corresponding portion of the fluid storage area of the compressor, and direct the fluid towards the pumping member. 3. The oil pump of claim 2, wherein the fluid drawn in by the upper and lower suction units comprises oil, refrigerant, or a mixture thereof. 4. The oil pump of claim 1, wherein the upper suction unit is formed on the pump body. 5. The oil pump of claim 1, wherein the upper suction unit is mounted on a side of the pump body. 6. The oil pump of claim 1, wherein the upper suction unit includes: a supply passage connected to the pumping part; a suction passage which couples a fluid storage area of the compressor to the supply passage; a cover configured to cover the suction passage, wherein the cover includes at least one intake; and an opening and shutting member configured to selectively open and shut the supply passage. 7. The oil pump of claim 6, wherein a cross sectional area of the suction passage is greater than a cross sectional area of the supply passage, and wherein the opening and shutting member comprises a ball valve positioned where the supply passage meets the suction passage, wherein a specific gravity of a ball portion of the ball valve is less than that of fluid to be drawn into the suction and supply passages so that the ball ascends into the suction passage as the fluid is drawn in. 8. The oil pump of claim 6, wherein the upper suction unit is configured to draw fluid from an upper portion of the fluid storage area in through the suction passage and to direct the fluid into the supply passage based on the selective positioning of the opening and shutting member. 9. The oil pump of claim 8, wherein the supply passage is configured to direct the fluid towards the pumping part. 10. The oil pump of claim 6, wherein the lower suction unit is configured to draw in fluid from a lower portion of the fluid storage area and to direct the fluid towards the pumping part. 11. The oil pump of claim 6, wherein the cover is configured to be inserted into the suction passage. 12. The oil pump of claim 6, wherein the cover is configured to be coupled to the pump body. 13. The oil pump of claim 6, wherein the opening and shutting member has a lighter specific gravity than that of a fluid to be drawn in through the suction passage. 14. The oil pump of claim 6, wherein the opening and shutting member is positioned at an upper end of the supply passage which is coupled to the suction passage. 15. The oil pump of claim 1, wherein the upper suction unit includes: a supply pipe configured to be inserted into a side of the pump body so as to form a supply passage; a suction pipe which forms a suction passage coupled to the supply passage, wherein the suction passage couples a fluid storage area of the compressor to the supply passage; and an opening and shutting member configured to open and shut the supply passage. 16. The oil pump of claim 15, wherein a diameter of the suction pipe is greater than a diameter of the supply pipe, and wherein the opening and shutting member comprises a ball valve positioned where the supply pipe meets the suction pipe, wherein a specific gravity of a ball portion of the ball valve is less than that of fluid to be drawn into the suction passage and through the supply passage so that the ball ascends into the suction pipe as the fluid is drawn in. 17. The oil pump of claim 15, further comprising a cover coupled to the supply pipe, wherein the cover includes at least one intake. 18. The oil pump of claim 15, wherein the suction pipe has at least one intake. 19. The oil pump of claim 15, wherein the opening and shutting member has a lighter specific gravity than that of oil in the fluid storage area. 20. The oil pump of claim 15, wherein the opening and shutting member is positioned at an upper end of the supply passage which is coupled to the suction passage. 21. A scroll compressor comprising the oil pump of claim 1. 22. An oil pump for a compressor including a casing having a fluid storage area formed therein, the oil pump comprising: a pump body; a drive shaft which extends through the pump body; a pumping member coupled to the pump body so as to define a pumping part therebetween; a lower suction unit provided on a lower side of the pump body, wherein the lower suction unit draws fluid stored in the storage area into the oil pump and supplies the fluid to the pumping part through at least one passage formed in the lower suction unit; and an upper suction unit provided on the pump body wherein the upper suction unit draws fluid stored in the storage area into the oil pump and supplies the fluid to the pumping part. 23. The oil pump of claim 22, wherein the fluid drawn in by the upper and lower suction units is oil, refrigerant, or a mixture thereof. 24. The oil pump of claim 22, wherein the upper suction unit includes: a supply passage connected to the pumping part; a suction passage having a larger cross sectional area than that of the supply passage; a cover configured to cover the suction passage, wherein the cover has at least one intake; and an opening and shutting member configured to selectively open and shut the supply passage. 25. The oil pump of claim 24, wherein a portion of the cover is configured to be inserted into the suction passage so as to couple the cover to the suction passage. 26. The oil pump of claim 24, wherein the cover is configured to be coupled to an upper side of the pump body. 27. A scroll compressor comprising the oil pump of claim 22. 28. An oil pump for a compressor including a casing having a fluid storage area formed therein, the oil pump comprising: a pump body; a drive shaft which extends through the pump body; a pumping member coupled to the pump body so as to define a pumping part therebetween, wherein the pumping member is configured to rotate as the drive shaft rotates; a lower suction unit provided on a lower side of the pump body, wherein the lower suction unit supplies fluid stored in the storage area to the pumping part through at least one passage formed in the lower suction unit; and an upper suction unit provided on a side of the pump body, wherein the upper suction unit supplies fluid stored in the storage area to the pumping part through at least one passage formed in the upper suction unit. 29. The oil pump of claim 28, wherein the fluid is oil, a refrigerant, or a mixture thereof. 30. The oil pump of claim 28, wherein the upper suction unit includes: a supply pipe inserted into a side of the pump body so as to form a supply passage; a suction pipe which forms a suction passage coupled to the supply passage, wherein the suction pipe has a larger diameter than that of the supply pipe; an opening and shutting member configured to open and shut the supply passage; and a cover having at least one intake, wherein an end portion of the cover is configured to be inserted into the suction pipe so as to couple the cover and the suction pipe. 31. The oil pump of claim 28, wherein the upper suction unit includes: a supply pipe inserted into a side of the pump body so as to form a supply passage; a suction pipe which forms a suction passage coupled to the supply passage, wherein the suction pipe has a larger diameter than that of the supply pipe, and wherein the suction pipe has at least one intake formed in an exposed portion thereof and an opening and shutting member configured to open and shut the supply passage. 32. An oil pump for a compressor, comprising: a pump body coupled to a drive shaft; a pumping member coupled to the pump body so as to define a pumping part therebetween; a pump cover coupled to a lower side of the pump body, the pump cover including a lower suction unit having at least one passage formed therein; and an upper suction unit positioned above the lower suction unit, the upper suction unit having at least one passage formed therein, wherein the upper suction unit comprises: a supply passage connected to the pumping part; a suction passage which couples a fluid storage area of the compressor to the supply passage; a cover configured to cover the suction passage, wherein the cover includes at least one intake; and an opening and shutting member configured to selectively open and shut the supply passage.
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