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US 5,435,136 AGranted
Pulse tube heat engine
AssigneesAisin Seiki Kabushiki Kaisha, Ecti Kabushiki Kaisha
InventorsYoshihiro Ishizaki, Takayuki Matsui
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AssigneesAisin Seiki Kabushiki Kaisha, Ecti Kabushiki Kaisha
InventorsYoshihiro Ishizaki, Takayuki Matsui
Estimating the term…
A pulse tube refrigerator includes a compression space defined by a compression piston inside a cylinder, an expansion space defined by an expansion piston inside a cylinder, the expansion piston being reciprocated at an advance angle of a constant phase difference within a range of 10.degree.-45.degree. relative to the compression piston, and first and second thermal systems communicating the compression and expansion spaces. Each thermal system has a radiator, a regenerator, a cold head and a pulse tube, with the regenerator of the second thermal system being composed of two regenerator sections. The cold head of the first thermal system is made to perform a heat exchange with the second thermal system between the two regenerator sections thereof, whereby a very low temperature is obtained from the cold head of the second thermal system.
A pulse tube heat engine comprising a compression space, a radiator, a regenerator, a heat absorber, a pulse tube and an expansion space, wherein said radiator, said regenerator, said heat absorber and said pulse tube are connected between said compression space and said expansion space of a working fluid, and a variation in the volume of said expansion space is advanced by a constant phase difference within a range of phases of from 0.degree. to +60.degree. relative to a variation in the volume of said compression space.
A pulse tube refrigerator comprising:
In a pulse tube refrigerator having a couple of low thermal systems which are connected in heat exchangable relation with each other and each has a compression space, a radiator, a regenerator, a cold head, a pulse tube and an expansion space, the regenerator and the pulse tube of a first thermal system are axially arranged in a cylindrical form and connected by the cold head of the first thermal system, and the regenerator and the pulse tube of a second thermal system are axially arranged in a cylindrical form about the pulse tube of said first thermal system and connected by the cold head of the second thermal system.
A refrigerator having a relatively large volume compression space, an expansion space arranged in horizontally opposed form with respect to the compression space, a radiator, a regenerator, a cold head, and a pulse tube, both the spaces being communicated by a flexible tube and pistons defining said spaces being operated in synchronism with each other at a constant phase angle within a range of 10.degree.-45.degree..
Dependencies are inferred from the claim text.