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<blockquote data-quote="pistole" data-source="post: 55285" data-attributes="member: 924"><p>sorry , but thats not correct.</p><p></p><p>there has never been anything like a 'variable speed compressor'.</p><p></p><p>what there is on most conti cars is a compressor that is 'on' all the </p><p>time , ie , it does not cut in/out depending on temperature , like most</p><p>Jap aircon systems.</p><p></p><p>How the system modulates temperature (and by definition , how hard</p><p>the compressor works) is by having an 'expansion valve' that has an</p><p>adjustable aperture. The aperture is controlled by the thermostat that </p><p>you set by the temp that you want in the cabin. The expansion valve</p><p>enable the freon (or whatever gas is in there) to 'expand' thus cooling</p><p>itself in the process. This 'cooling' works to pick up heat in the cooling- </p><p>coil and 'exchanges' the heat vide the medium of the gas to the outside</p><p>air.</p><p></p><p>so , the cooler you want it , the smaller the aperture , the more </p><p>pressure in the high pressure circuit , the harder the compressor</p><p>works and more load.</p><p></p><p>the warmer you want it , the bigger the aperture , the less pressure</p><p>on the high pressure circuit , the less load on the compressor.</p></blockquote><p></p>
[QUOTE="pistole, post: 55285, member: 924"] sorry , but thats not correct. there has never been anything like a 'variable speed compressor'. what there is on most conti cars is a compressor that is 'on' all the time , ie , it does not cut in/out depending on temperature , like most Jap aircon systems. How the system modulates temperature (and by definition , how hard the compressor works) is by having an 'expansion valve' that has an adjustable aperture. The aperture is controlled by the thermostat that you set by the temp that you want in the cabin. The expansion valve enable the freon (or whatever gas is in there) to 'expand' thus cooling itself in the process. This 'cooling' works to pick up heat in the cooling- coil and 'exchanges' the heat vide the medium of the gas to the outside air. so , the cooler you want it , the smaller the aperture , the more pressure in the high pressure circuit , the harder the compressor works and more load. the warmer you want it , the bigger the aperture , the less pressure on the high pressure circuit , the less load on the compressor. [/QUOTE]
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