Multi-cylinder variable delivery compressor
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsKimio Kato, Hiroya Kono, Hisao Kobayashi
Life of this patent
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Abstract
A multi-cylinder variable delivery compressor containing a plurality of compression chambers is adapted for use in compressing a refrigerant gas of a cooling circuit. The compressor has a first delivery chamber communicating with the compression chambers by way of a fixedly arranged delivery valve means and a second delivery chamber communicating with the compression chambers by way of a movably arranged delivery valve means. The movable delivery valve means is urged from its closing position toward its opening position, and is moved back to its closing position when a delivery pressure from the cooling circuit is applied to the movable delivery valve means.
Claims8
A multi-cylinder compressor adapted for use in compressing a refrigerant gas of a cooling circuit comprising:
- cylinder block means having therein a plurality of compression chambers;
- housing means having therein a first and a second delivery chamber into which the refrigerant gas is delivered from said compression chambers, and at least a suction chamber from which the refrigerant gas is sucked into said compression chambers;
- valve plate means arranged between said cylinder block means and said housing means, said valve plate means having therein suction ports providing a fluid communication between said compression chambers and said suction chamber, and delivery ports providing a fluid communication between said compression chambers and said first and second delivery chambers;
- a suction means for introducing the refrigerant gas from said cooling circuit into said suction chamber;
- a delivery means for delivering the refrigerant gas from said first and second delivery chambers to said cooling circuit;
- first delivery valve means closing said delivery ports that provide a fluid communication between said compression chambers and said first delivery chamber, said first delivery valve means being opened by said refrigerant gas delivered from said compression chambers into said first delivery chamber;
- second delivery valve means capable of moving between a first position for closing said delivery ports that provide a fluid communication between said compression chambers and said second delivery chamber and a second position for opening said delivery ports that provide a fluid communication between said compression chambers and said second delivery chamber;
- means for urging said second delivery valve means from said first position toward said second position;
- a pressure inlet means for applying to said second delivery valve means either a high delivery pressure to move said second delivery valve means from said second position to said first position against said urging means, or a low suction pressure, permitting said second delivery valve means to be moved from said first position to said second position by said urging means, and;
- valve means arranged between said second delivery chamber and said delivery means, said valve means being opened when said second delivery valve means is moved from said second position to said first position.
Dependencies are inferred from the claim text.