Patent ID: 6769269
Filing Date: 2004-08-03
Classification: F25B

Abstract:
A multistage gas and liquid phase separation condenser comprising:a super heat cooling/condensing section (dm1) for cooling gaseous refrigerant of high temperature and pressure, which is introduced into the section (dm1), to remove excessive heat therefrom and condense gaseous refrigerant; a first condensing section (dm2) placed over the super heat cooling/condensing section (dm1) for re-condensing gaseous refrigerant; a second condensing section (dm3) placed over the first condensing section (dm2) for re-condensing refrigerant to a liquid ratio higher than in the first condensing section (dm2), whereby refrigerant is introduced into a receiver section (400) after flowing through the second condensing section (dm3); a first sub-cooling section (dm4) placed downstream of the super heat cooling/condensing section (dm1) for sub-cooling refrigerant more than in the super heat cooling/condensing section (dm1), whereby refrigerant is introduced into the receiver section (400) after flowing though the first sub-cooling section (dm4) to join liquid refrigerant from the second condensing section (dm3); and a second sub-cooling section (dm5) placed downstream of the first sub-cooling section (dm4) for sub-cooling liquid refrigerant joined from the second condensing section (dm3) and the first sub-cooling section (dm4) and for discharging sub-cooled liquid refrigerant therefrom, wherein the sections (dm1, dm2, dm3, dm4 and dm5) are divided from one another; and the sections (dm1, dm2, dm3, dm4 and dm5) satisfy an expression of Adm1>Adm2&gE;Adm3 and Adm4&lE;Adm5, wherein Adm1 is an area of the super heat cooling/condensing section (dm1), Adm2 is an area of the first condensing section (dm2), Adm3 is an area of the second condensing section (dm3), Adm4 is an area of the first sub-cooling section (dm4), and Adm5 is an area of the second sub-cooling section (dm5), a pre-sub-cooling section (dm4â€²) in the first sub-cooling section (dm4), placed between the super heat cooling/condensing section (dm1) and the second sub-cooling section (dm5), and wherein the pre-sub-cooling section (dm4â€²) satisfies an expression of 0.02&lE;Adm4â€²/ATOTAL&lE;0.15, wherein Adm4 indicates a passage area of the pre-sub-cooling section (dm4â€²) for sub-cooling liquid refrigerant, and ATOTAL indicates a total heat transfer area of the condenser.