Refrigerator and/or freezer

Abstract

The present invention relates to a refrigerator and/or freezer, comprising a liquefier, an evaporator and a compressor, wherein the refrigerator and/or freezer includes means by which a pressure compensation between liquefier and evaporator is prevented or slowed down during the standstill of the compressor, and that the refrigerator and/or freezer includes a means for effecting the compressor start-up, wherein the means for effecting the compressor start-up comprise means for increasing the starting torque of the compressor and/or means for increasing the starting current of the compressor motor and/or means which ensure that the crank shaft of the compressor stops in a preferred position after shutting off the compressor motor, and/or means for the at least partial pressure compensation between the pressure side and the suction side of the compressor and/or means for reducing the initially required starting torque.

1 . A refrigerator and/or freezer comprising a liquefier, an evaporator and a compressor, wherein
 the refrigerator and/or freezer includes means by which a pressure compensation between liquefier and evaporator is prevented or slowed down while the compressor is at standstill,   the refrigerator and/or freezer includes a means for effecting the compressor start-up,   the means for effecting the compressor start-up comprise   (i) means for increasing the starting torque of the compressor and/or   (ii) means for increasing the starting current of the compressor motor and/or   (iii) means which ensure that the crank shaft of the compressor stops in a preferred position upon shutting off the compressor motor and/or   (iv) means for the at least partial pressure compensation between the pressure side and the suction side of the compressor and/or   (v) means for reducing the initially required starting torque.   
   
   
       2 . The refrigerator and/or freezer according to  claim 1 , where testing means is provided for checking the starting behavior of the compressor, which is configured such that it detects whether the compressor starts, and
 actuating means are provided, which are activated by the means for effecting the compressor start-up with the means (i) and/or (ii) and/or (iv), when it is detected by the testing means that the compressor has not started.   
   
   
       3 . The refrigerator and/or freezer according to  claim 2 , wherein the actuating means form part of the testing means. 
   
   
       4 . The refrigerator and/or freezer according to  claim 1 , wherein the actuating means are configured such that they are only activated by the means for effecting the compressor start-up with the means (i) and/or (ii) and/or (iv) for a period until a proper start-up of the compressor is detected by the testing means. 
   
   
       5 . The refrigerator and/or freezer according to  claim 1 , wherein the means for the at least partial pressure compensation between the pressure side and the suction side of the compressor comprise a bypass line which extends inside or outside the compressor. 
   
   
       6 . The refrigerator and/or freezer according to  claim 5 , wherein a pressure compensation valve is disposed in the bypass line. 
   
   
       7 . The refrigerator and/or freezer according to  claim 6 , wherein the actuating means are configured such that they open the pressure compensation valve for a period until the start-up of the compressor is detected by means of the testing means. 
   
   
       8 . The refrigerator and/or freezer according to  claim 1 , wherein the means for increasing the starting torque of the compressor comprise at least one spring or elastic element, which is configured and arranged such that it is tensioned in the condition in which the compressor is at standstill and in the tensioned condition exerts a moment supporting the compressor start-up. 
   
   
       9 . The refrigerator and/or freezer according to  claim 1 , wherein the compressor motor includes a shaft or a shaft is connected with the compressor motor, which has at least two separate shaft portions, and the means for reducing the initially required starting torque comprise a spring or a deformable power transmission element, which is connected with the two separate shaft portions such that a rotation of one shaft portion effects a rotation of the other shaft portion via the spring or via the power transmission element. 
   
   
       10 . the refrigerator and/or freezer according to  claim 2 , wherein the actuating means are configured such that they are only activated by the means for effecting the compressor start-up with the means (i) and/or (ii) and/or (iv) for a period until a proper start-up of the compressor is detected by the testing means. 
   
   
       11 . the refrigerator and/or freezer according to  claim 3 , wherein the actuating means are configured such that they are only activated by the means for effecting the compressor start-up with the means (i) and/or (ii) and/or (iv) for a period until a proper start-up of the compressor is detected by the testing means. 
   
   
       12 . The refrigerator and/or freezer according to  claim 11 , wherein the means for the at least partial pressure compensation between the pressure side and the suction side of the compressor comprise a bypass line which extends inside or outside the compressor. 
   
   
       13 . The refrigerator and/or freezer according to  claim 10 , wherein the means for the at least partial pressure compensation between the pressure side and the suction side of the compressor comprise a bypass line which extends inside or outside the compressor. 
   
   
       14 . The refrigerator and/or freezer according to  claim 2 , wherein the means for the at least partial pressure compensation between the pressure side and the suction side of the compressor comprise a bypass line which extends inside or outside the compressor. 
   
   
       15 . The refrigerator and/or freezer according to  claim 3 , wherein the means for the at least partial pressure compensation between the pressure side and the suction side of the compressor comprise a bypass line which extends inside or outside the compressor. 
   
   
       16 . The refrigerator and/or freezer according to  claim 4 , wherein the means for the at least partial pressure compensation between the pressure side and the suction side of the compressor comprise a bypass line which extends inside or outside the compressor. 
   
   
       17 . The refrigerator and/or freezer according to  claim 16 , wherein a pressure compensation valve is disposed in the bypass line. 
   
   
       18 . The refrigerator and/or freezer according to  claim 15 , wherein a pressure compensation valve is disposed in the bypass line. 
   
   
       19 . The refrigerator and/or freezer according to  claim 14 , wherein a pressure compensation valve is disposed in the bypass line. 
   
   
       20 . The refrigerator and/or freezer according to  claim 13 , wherein a pressure compensation valve is disposed in the bypass line.