Scroll compressor

Abstract

In a scroll compressor, by including a frame fixed at an internal space of a casing; a fixed scroll fixed to the frame and having an involute-shaped wrap; an orbiting scroll installed so as to perform an orbiting motion between the frame and the fixed scroll and having an involute-shaped wrap so as to form a compression space moving continually by being engaged with the wrap of the fixed scroll; a driving motor installed at the internal space of the casing in order to generate a driving force for making the orbiting scroll perform the orbiting motion; a discharge cover sealed-installed so as to form a discharge space with the fixed scroll; and an overheating preventive device including a temperature sensing device installed at the discharge cover so as to stop the operation of the driving motor when a temperature of a refrigerant gas is not less than a certain temperature and an over load protector installed at an upper portion of the driving motor, after sensing a temperature, by operating the over load protector directly, it is possible to cope with an overheating state of the compressor instantly, and accordingly it is possible to prevent damage of various parts due to overheating compression.

What is claimed is:  
     
         1 . A scroll compressor, comprising: 
 a frame fixed at an internal space of a casing;    a fixed scroll fixed to the frame and having an involute-shaped wrap;    an orbiting scroll installed so as to perform an orbiting motion between the frame and the fixed scroll and having an involute-shaped wrap so as to form a compression space moving continually by being engaged with the wrap of the fixed scroll;    a driving motor installed at the internal space of the casing in order to generate a driving force for making the orbiting scroll perform the orbiting motion;    a discharge cover sealed-installed so as to form a discharge space with the fixed scroll; and    an overheating preventive device including a temperature sensing device installed at the discharge cover so as to stop the operation of the driving motor when a temperature of a refrigerant gas is not less than a certain temperature and an over load protector installed at an upper portion of the driving motor.    
     
     
         2 . The scroll compressor of  claim 1 , wherein the temperature sensing device is serially connected to the over load protector and a common line of a motor winding which directly connects a power to the motor.  
     
     
         3 . The scroll compressor of  claim 2 , wherein power is single phase power.  
     
     
         4 . The scroll compressor of  claim 2 , wherein power is three phase power.  
     
     
         5 . The scroll compressor of  claim 4 , wherein there are two temperature sensing devices, and they respectively connect two electric lines of the common line of the motor winding to the over load protector serially.  
     
     
         6 . The scroll compressor of  claim 3 , wherein the temperature sensing device includes a temperature sensor which senses a temperature of a refrigerant gas and has an output terminal electrically connected to a signal line connected to the over load protector; and a sensor connection terminal which is electrically connected to the output terminal.  
     
     
         7 . The scroll compressor of  claim 6 , wherein the temperature sensor is formed as a metal can having a certain space and includes a bimetal and a base plate for supporting the bimetal.  
     
     
         8 . The scroll compressor of  claim 7 , wherein the sensor connection terminal is inserted-combined with a terminal insertion hole formed at the internal wall of the discharge cover in order to combine with an output terminal of the temperature sensor.  
     
     
         9 . The scroll compressor of  claim 5 , wherein the temperature sensing device includes a temperature sensor which senses a temperature of a refrigerant gas and has an output terminal electrically connected to a signal line connected to the over load protector; and a sensor connection terminal which is electrically connected to the output terminal.  
     
     
         10 . The scroll compressor of  claim 9 , wherein the temperature sensor is formed as a metal can having a certain space and includes a bimetal and a base plate for supporting the bimetal.  
     
     
         11 . The scroll compressor of  claim 10 , wherein the sensor connection terminal is inserted-combined with a terminal insertion hole formed at the internal wall of the discharge cover in order to combine with an output terminal of the temperature sensor.  
     
     
         12 . The scroll compressor of  claim 3 , wherein the temperature sensing device is a temperature sensor which senses a temperature of a refrigerant gas and has an output terminal electrically connected to a signal line connected to the over load protector.  
     
     
         13 . The scroll compressor of  claim 12 , wherein the temperature sensor is formed as a metal can having a certain space; and includes a bimetal and a base plate for supporting the bimetal.  
     
     
         14 . The scroll compressor of  claim 13 , wherein the temperature sensor is inserted-combined with a sensor insertion hole formed at the discharge cover.  
     
     
         15 . The scroll compressor of  claim 14 , wherein the temperature sensor is sealed-combined with the sensor insertion hole by welding.  
     
     
         16 . The scroll compressor of  claim 5 , wherein the temperature sensing device is a temperature sensor which senses a temperature of a refrigerant gas and has an output terminal electrically connected to a signal line connected to the over load protector.  
     
     
         17 . The scroll compressor of  claim 16 , wherein the temperature sensor is formed as a metal can having a certain space; and includes a bimetal and a base plate for supporting the bimetal.  
     
     
         18 . The scroll compressor of  claim 17 , wherein the temperature sensor is inserted-combined with a sensor insertion hole formed at the discharge cover.  
     
     
         19 . The scroll compressor of  claim 13 , wherein the temperature sensor is inserted-combined with the outer circumference of a sensor insertion groove curved-formed at the discharge cover in order to sense indirectly a temperature of a refrigerant gas transmitted to the discharge cover.  
     
     
         20 . The scroll compressor of  claim 17 , wherein the temperature sensor is inserted-combined with the outer circumference of a sensor insertion groove curved-formed at the discharge cover in order to sense indirectly a temperature of a refrigerant gas transmitted to the discharge cover.