JP2003075006A5 - - Google Patents

Claims (5)

A piston fitted in a cylinder filled with working gas, driven by a driving means and reciprocating;
A displacer fitted coaxially with the piston in the cylinder and reciprocating with a phase difference from the piston under the force of reciprocating movement of the piston;
An expansion chamber and a compression chamber defined in the cylinder so as to sandwich the displacer therebetween,
First temperature detecting means for detecting the temperature of the expansion chamber;
Second temperature detecting means for detecting the temperature of the compression chamber;
An input current detecting means for detecting an input current used for driving the piston;
Detection means for detecting a collision risk of at least one of the piston and the displacer based on the temperature detected by the first and second temperature detection means and the input current detected by the input current detection means. And a Stirling institution. Said temperature detecting means and the temperature detected by the input current detecting means and the input current, if it is determined that less than a reference value determined Me pre increases the input current supplied to said driving means, a predetermined reference 2. The Stirling engine according to claim 1, further comprising a current control unit that does not increase the input current any more when the value is determined to be greater than or equal to the value. A piston fitted in a cylinder and driven by a driving means to reciprocate;
A displacer fitted in the cylinder and reciprocating with a phase difference with the piston;
A compression chamber defined between the piston and the displacer;
An expansion chamber located on the opposite side of the compression chamber across the displacer;
An inverter power supply circuit for supplying power to the driving means;
Collision risk detection means for detecting a collision risk that the displacer collides with either the closed end of the piston or the cylinder;
A Stirling engine comprising inverter power supply circuit control means for controlling electric power supplied from the inverter power supply circuit to the drive means based on information detected by the collision risk detection means.   The Stirling engine according to claim 3, wherein the collision risk detection means is power supply voltage detection means for detecting a voltage of electric power input to the inverter power supply circuit. A casing that holds and fixes the cylinder; a balance mass that is attached to the casing and absorbs vibration of the casing caused by reciprocation of the piston and the displacer; and balance mass vibration detection means that detects vibration of the balance mass. In addition,
The Stirling engine according to claim 3 or 4 , wherein the collision risk detection means is the balance mass vibration detection means.