Piston compressor, more particularly for a heat pump

Abstract

The invention relates to a piston compressor, comprising a cylinder, a piston mounted for linear movement along a cylinder longitudinal axis (L), and a working chamber. The working chamber is fluidically connected to a working-medium inlet chamber by means of a first valve portion and to a working-medium outlet chamber by means of a second valve portion. The working chamber is delimited by an inner lateral surface, a piston end face and a working-chamber head portion, and the working-chamber head portion is formed from a geometric arrangement of the first and second valve portions. For improved efficiency, the first and second valve portions are arranged such that the working chamber is tapered toward the working-chamber heat portion.

1 . A piston compressor for a heat pump, comprising
 a cylinder,   a piston mounted in the cylinder for linear movement along a cylinder longitudinal axis,   a working chamber formed in the cylinder with its volume capable of being changed via a piston movement,   a valve device comprising a first and second valve portion,   wherein the working chamber is fluidically connected to a working-medium inlet chamber by means of the first valve portion of the valve device and to a working-medium outlet chamber by means of the second valve portion of the valve device,   wherein the working chamber is delimited by an inner lateral surface of the cylinder, a piston end face formed on the piston end of the piston and a working-chamber head portion arranged opposite from the piston end face, wherein the working-chamber head portion is formed from a geometric arrangement of the first and second valve portions, and   the first and the second valve portion are arranged in such a way that the working chamber tapers in the direction of the working-chamber head portion.   
     
     
         2 . The piston compressor according to  claim 1 , wherein the first and second valve portions are each arranged at an angle not equal to 90° to the cylinder longitudinal axis (L). 
     
     
         3 . The piston compressor according to  claim 1 , wherein the first and second valve portions are arranged at an angel deviating from one another relative to the cylinder longitudinal axis (L). 
     
     
         4 . The piston compressor according to  claim 1 , wherein the first and second valve portions are arranged at the same angle relative to the cylinder longitudinal axis (L). 
     
     
         5 . The piston compressor according to any one of the  claim 1 , wherein the working-chamber head portion terminates at an acute or obtuse angle with respect to its cross-section, wherein the acute or obtuse angle is spanned by the first and second valve portions. 
     
     
         6 . The piston compressor according to any one of the  claim 1 , wherein the working-chamber head portion terminates at a right angle with respect to its cross-section, wherein the right angle is spanned by the first and second valve portions. 
     
     
         7 . The piston compressor according to  claim 1 , wherein the working-chamber head portion has a concave cross-sectional shape in the direction of the working chamber. 
     
     
         8 . The piston compressor according to  claim 1 , wherein the first and second valve portions define a working-chamber head portion shaped like a hemisphere. 
     
     
         9 . The piston compressor according to  claim 1 , wherein the piston end face geometrically corresponds to the working-chamber head portion. 
     
     
         10 . The piston compressor according to  claim 1 , wherein the working-medium inlet chamber and the working-medium outlet chamber are separated from each other by a separator adjacent to the working-chamber head portion. 
     
     
         11 . The piston compressor according to  claim 10 , wherein the separator comprises an insulation layer arranged between a wall of the working-medium inlet chamber and a wall working-medium outlet chamber. 
     
     
         12 . A high-temperature heat pump with a piston compressor according  claim 1 . 
     
     
         13 . The piston compressor of  claim 11  wherein the insulation layer is an air gap.