Rotary compressor, control method thereof, and air conditioner using the same

Abstract

A rotary compressor includes a cylinder to form a first compressing chamber and a second compressing chamber partitioned from each other and including a first vane slot and a second vane slot which are formed in the first compressing chamber and the second compressing chamber, respectively, and a first roller and a second roller to respectively rotate in the first compressing chamber and the second compressing chamber to compress compressing media, the rotary compressor operating in a full load running mode in which a load running is concurrently performed in the first compressing chamber and the second compressing chamber, and in a partial load running mode in which a load running is performed in only the second compressing chamber, the rotary compressor further including a first vane which is controllably accommodated in the first vane slot, a vane driving part to enable the first vane to contact and be distanced apart from an outer surface of the first roller to perform a load running and a no-load running in the first compressing chamber, and a controller to control the vane driving part to intermittently perform the load running in the first compressing chamber in the partial load running mode.

1 . A rotary compressor comprising:
 a cylinder to form a first compressing chamber and a second compressing chamber partitioned from each other and comprising:
 a first vane slot formed in the first compressing chamber, and 
 a second vane slot formed in the second compressing chamber; 
   a first roller to rotate in the first compressing chamber to compress compressing media; and   a second roller to rotate in the second compressing chamber to compress the compressing media;   a first vane controllably accommodated in the first vane slot;   a vane driving part to enable the first vane to contact and be distanced apart from an outer surface of the first roller to perform a load running and a no-load running in the first compressing chamber; and   a controller to control the vane driving part to intermittently perform the load running in the first compressing chamber in the partial load running mode,   wherein the rotary compressor operates in a full load running mode in which a load running is concurrently performed in the first compressing chamber and the second compressing chamber, and in a partial load running mode in which a load running is performed in only the second compressing chamber.   
   
   
       2 . The rotary compressor according to  claim 1 , wherein the controller controls the vane driving part so that the first vane can contact and be distanced apart from the outer surface of the first roller according to a predetermined period. 
   
   
       3 . The rotary compressor according to  claim 2 , further comprising:
 a temperature sensing part to measure temperature of the compressing media discharged from the cylinder,   wherein the controller controls the vane driving part based on a signal of the temperature sensing part.   
   
   
       4 . The rotary compressor according to  claim 1 , further comprising:
 a temperature sensing part to measure temperature of the compressing media discharged from the cylinder,   wherein the controller controls the vane driving part based on a signal of the temperature sensing part.   
   
   
       5 . The rotary compressor according to  claim 1 , wherein the vane driving part comprises:
 a connecting pipe to communicate with the first vane slot;   a high pressure pipe to communicate with the connecting pipe, and to allow part of the compressing media discharged from the cylinder to flow therethrough;   a low pressure pipe to communicate with the connecting pipe, and to allow part of the compressing media introduced into the compressing chambers to flow therethrough; and   a channel converting valve provided at the connecting pipe to enable the high pressure pipe and the low pressure pipe to selectively communicate with the connecting pipe.   
   
   
       6 . The rotary compressor according to  claim 5 , wherein the controller controls the channel converting valve to allow the high pressure pipe to communicate with the connecting pipe in the load running of the first compressing chamber, and controls the channel converting valve to allow the low pressure pipe to communicate with the connecting pipe in the no-load running of the first compressing chamber. 
   
   
       7 . An air conditioner, comprising:
 a rotary compressor, comprising:
 a cylinder to form a first compressing chamber and a second compressing chamber partitioned from each other and comprising:
 a first vane slot formed in the first compressing chamber, and 
 a second vane slot formed in the second compressing chamber; 
 
 a first roller to rotate in the first compressing chamber to compress compressing media; and 
 a second roller to rotate in the second compressing chamber to compress the compressing media, 
 a first vane controllably accommodated in the first vane slot, 
 a vane driving part to enable the first vane to contact and be distanced apart from an outer surface of the first roller to perform a load running and a no-load running in the first compressing chamber, and 
 a controller to control the vane driving part to intermittently perform the load running in the first compressing chamber in the partial load running mode, 
 wherein the rotary compressor operates in a full load running mode in which a load running is concurrently performed in the first compressing chamber and the second compressing chamber, and in a partial load running mode in which a load running is performed in only the second compressing chamber; 
   a condenser to perform heat-exchange between the compressing media compressed from the rotary compressor and outdoor air;   an expanding part to drop pressure of the compressing media condensed from the condenser;   an evaporator to perform heat-exchange between the compressing media expanded from the expanding part and an indoor air; and   an accumulator to separate the compressing media evaporated from the evaporator into gas and liquid, and to supply the compressing media of a gaseous state to the rotary compressor.   
   
   
       8 . The air conditioner of  claim 7 , wherein the controller controls the vane driving part so that the first vane can contact and be distanced apart from the outer surface of the first roller according to a predetermined period. 
   
   
       9 . The air conditioner of  claim 8 , further comprising:
 a temperature sensing part to measure temperature of the compressing media discharged from the cylinder,   wherein the controller controls the vane driving part based on a signal of the temperature sensing part.   
   
   
       10 . The air conditioner of  claim 7 , further comprising:
 a temperature sensing part to measure temperature of the compressing media discharged from the cylinder,   wherein the controller controls the vane driving part based on a signal of the temperature sensing part.   
   
   
       11 . The air conditioner of  claim 7 , wherein the vane driving part comprises:
 a connecting pipe to communicate with the first vane slot;   a high pressure pipe to communicate with the connecting pipe, and to allow part of the compressing media discharged from the cylinder to flow therethrough;   a low pressure pipe to communicate with the connecting pipe, and to allow part of the compressing media introduced into the compressing chambers to flow therethrough; and   a channel converting valve provided at the connecting pipe to enable the high pressure pipe and the low pressure pipe to selectively communicate with the connecting pipe.   
   
   
       12 . The air conditioner of  claim 11 , wherein the controller controls the channel converting valve to allow the high pressure pipe to communicate with the connecting pipe in the load running of the first compressing chamber, and controls the channel converting valve to allow the low pressure pipe to communicate with the connecting pipe in the no-load running of the first compressing chamber. 
   
   
       13 . A control method of a rotary compressor which comprises a cylinder which forms a first compressing chamber and a second compressing chamber partitioned from each other, the rotary compressor operating in a full load running mode in which a load running is concurrently performed in the first compressing chamber and the second compressing chamber, and in a partial load running mode in which a load running is performed in only the second compressing chamber, the control method comprising:
 performing a load running in the second compressing chamber; and   intermittently performing a load running in the first compressing chamber in the partial load running mode.   
   
   
       14 . The control method of the rotary compressor according to  claim 13 , wherein the load running is performed in the first compressing chamber according to a predetermined period in the partial load running mode. 
   
   
       15 . The control method of the rotary compressor according to  claim 13 , further comprising:
 measuring the temperature of the compressing media discharged from the cylinder in the partial load running mode,   wherein the load running is intermittently performed in the first compressing chamber if the temperature of the compressing media is higher than a predetermined temperature.   
   
   
       16 . The control method of the rotary compressor according to  claim 14 , further comprising:
 measuring the temperature of the compressing media discharged from the cylinder in the partial load running mode,   wherein the load running is intermittently performed in the first compressing chamber if the temperature of the compressing media is higher than a predetermined temperature.   
   
   
       17 . A rotary compressor, comprising:
 a cylinder to form a first compressing chamber and a second compressing chamber; and   a controller to control the first compressing chamber and the second compressing chamber according to a full load running mode in which a load running is concurrently performed in the first compressing chamber and the second compressing chamber, and a partial load running mode in which a load running is performed in only the second compressing chamber.   
   
   
       18 . The rotary compressor of  claim 17 , further comprising:
 a first roller to rotate in the first compressing chamber to compress compressing media;   a first vane controllably accommodated in the first vane slot; and   a vane driving part to enable the first vane to contact and be distanced apart from an outer surface of the first roller to perform the load running and a no-load running in the first compressing chamber.   
   
   
       19 . The rotary compressor of  claim 18 , wherein the controller controls the vane driving part based on temperature of the compressing media. 
   
   
       20 . The rotary compressor of  claim 19 , wherein the load running is performed in the first compressing chamber if the temperature of the compressing media is higher than a predetermined temperature