Compressor and oil blocking device therefor

Abstract

A compressor and oil blocking device therefor are provided which are capable of preventing oil from spreading onto, for example, a balance weight, which are capable of preventing oil from being excessively sucked into a compression device by a separating device disposed between a driving motor and the compression device, and which are capable of constantly maintaining a predetermined amount of oil in compression chambers regardless of a rotational speed of the driving motor by directly supplying oil to a bearing surface and the compression chambers and by easily discharging gas from an oil drain passage. A trochoid gear pump may be used to smoothly supply oil to the compression device. Further, a synchronous reluctance motor may be used to enhance a performance of the compressor and to expand a driving region of the compressor.

1 . A compressor, comprising:
 a casing;   a compression device having a compression chamber and configured to receive, compress, and discharge a refrigerant; and   an oil blocking device configured to block oil from the compression device from spreading onto certain mechanical parts disposed therebelow, wherein the oil blocking device comprises a substantially planar blocking plate with at least one oil flow path adjacent an outer circumference of the blocking plate.   
     
     
         2 . The compressor of  claim 1 , wherein the at least one oil flow path comprises at least one oil flow hole disposed in the blocking plate. 
     
     
         3 . The compressor of  claim 2 , wherein the at least one oil flow path further comprises a tube in communication with the at least one oil flow hole. 
     
     
         4 . The compressor of  claim 1 , wherein the at least one oil flow path comprises at least one channel formed at an outer periphery of the blocking plate. 
     
     
         5 . The compressor of  claim 4 , wherein the at least one channel is disposed adjacent the casing and forms an enclosed oil passage therewith. 
     
     
         6 . The compressor of  claim 1 , further comprising a drive motor configured to drive the compression device, wherein the certain mechanical parts comprise a balance weight attached to a rotational shaft connecting the motor to the compression device. 
     
     
         7 . The compressor of  claim 6 , wherein the compression device comprises:
 a fixed scroll; and   an orbiting scroll disposed adjacent thereto to form the compression chamber therebetween.   
     
     
         8 . The compressor of  claim 7 , wherein an oil supply passage is formed in the rotational shaft through which oil is supplied to the compression device. 
     
     
         9 . The compressor of  claim 8 , further comprising a pump attached to the rotational shaft configured to pump oil within the oil supply passage. 
     
     
         10 . The compressor of  claim 9 , wherein the pump comprises a trochoid gear pump. 
     
     
         11 . The compressor of  claim 8 , further comprising at least one oil discharge hole formed in the rotational shaft in communication with the oil supply passage. 
     
     
         12 . The compressor of  claim 8 , further comprising at least one gas discharge hole formed in the rotational shaft. 
     
     
         13 . The compressor of  claim 8 , further comprising a main frame having a bearing surface on which the orbiting scroll is supported, wherein an oil supply passage is formed in the main frame which is in communication with the oil supply passage formed in the rotational shaft. 
     
     
         14 . The compressor of  claim 1 , further comprising an oil supply pipe formed in the casing configured to allow oil to be supplied or returned to the compressor therethrough. 
     
     
         15 . The compressor of  claim 1 , further comprising an oil level checking pipe formed in the casing configured to allow an oil level in the compressor to be checked. 
     
     
         16 . A scroll compressor comprising the compressor of  claim 1 . 
     
     
         17 . A compressor, comprising:
 a casing;   a compression device having a compression chamber and configured to receive, compress, and discharge a refrigerant; and   an oil blocking device configured to block oil from the compression device from spreading onto certain mechanical parts, wherein the oil blocking device comprises a blocking plate with a plurality of oil directing flanges extending therefrom.   
     
     
         18 . The compressor of  claim 17 , wherein the plurality of oil directing flanges comprise at least three oil directing flanges. 
     
     
         19 . The compressor of  claim 18 , wherein at least three oil directing flanges are configured to direct oil toward a coil of a motor that drives the compression device. 
     
     
         20 . A scroll compressor comprising the compressor of  claim 17 . 
     
     
         21 . A compressor, comprising:
 a casing;   a drive motor disposed within the casing;   a compression device having a fixed scroll and an orbiting scroll forming a compression chamber therebetween and driven by the drive motor via a rotational shaft to receive, compress, and discharge a refrigerant, the orbiting shaft being supported on a bearing surface of a main frame;   a first oil passage formed in the rotational shaft to supply oil to the compression device;   a second oil passage formed in the main frame in communication with the first oil passage to supply oil to the compression device; and   an oil blocking device configured to block oil from spreading onto certain mechanical parts disposed below the drive motor.   
     
     
         22 . The compressor of  claim 21 , wherein the oil blocking device comprises a substantially planar blocking plate with at least oil flow path adjacent an outer circumference of the blocking plate. 
     
     
         23 . The compressor of  claim 22 , wherein the oil flow path comprises an oil flow hole disposed in blocking plate. 
     
     
         24 . The compressor of  claim 23 , wherein the oil flow path further comprises a tube in communication with the oil flow hole. 
     
     
         25 . The compressor of  claim 22 , wherein the oil flow path comprises a channel formed at an outer periphery of the blocking plate. 
     
     
         26 . The compressor of  claim 25 , wherein the channel is disposed adjacent the casing and forms an enclosed oil passage therewith. 
     
     
         27 . The compressor of  claim 21 , wherein the oil block device comprises a blocking plate with a plurality of oil directing flanges extending therefrom. 
     
     
         28 . The compressor of  claim 21 , further comprising a drive motor configured to drive the compression device, wherein the certain mechanical parts comprise a balance weight attached to a rotational shaft connecting the motor to the compression device. 
     
     
         29 . The compressor of  claim 21 , further comprising at least one gas discharge hole formed in the rotational shaft. 
     
     
         30 . The compressor of  claim 21 , further comprising an oil supply pipe formed in the casing configured to allow oil to be supplied or returned to the compressor therethrough. 
     
     
         31 . The compressor of  claim 21 , further comprising an oil level checking pipe formed in the casing configured to allow an oil level in the compressor to be checked. 
     
     
         32 . A scroll compressor comprising the compressor of  claim 21 .