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菲利浦斯气体制冷机是一种膨胀压缩整体机。在膨胀缸和压缩缸之间安装了没有阀门的回热器。基于制冷机的循环,采用了热机上著名的斯特林循环。整个循环可分成四个阶段,如图1(a)和(b)所示。在第Ⅰ阶段(1—2)中,气体在恒定温度 T_c下被压缩,其体积由 V_1变成 V_2,而压缩热传给了冷却水。在第Ⅱ阶段(2—3)中,等容变化(一对活塞运动)的气体以温度 T_E 向气缸的膨胀腔转移。气体温度则从 T_c 降为 T_E,这样在不变体积 V_2=V_3下,气体压力降低了。在第Ⅲ阶段(3—4)中气体等温膨胀,其体积由 V_3变到 V_4;同时气体吸收了热量。在第Ⅳ阶段(4—1)中气体等
Phillips gas chiller is an expansion and compression of the whole machine. There is a valveless regenerator installed between the expansion cylinder and the compression cylinder. Based on the refrigerator cycle, the famous Stirling cycle on the heat engine is used. The entire cycle can be divided into four phases, as shown in Figure 1 (a) and (b). In stage I (1-2), the gas is compressed at a constant temperature T_c, its volume changes from V_1 to V_2, and the heat of compression is transferred to the cooling water. In the second stage (2-3), the gas of equal volume change (a pair of piston movement) is transferred to the expansion chamber of the cylinder at the temperature T_E. The temperature of the gas drops from T_c to T_E, so that the gas pressure decreases with constant volume V_2 = V_3. In the third stage (3-4) gas isothermal expansion, the volume changes from V_3 to V_4; at the same time the gas absorbs the heat. In the fourth stage (4-1) in the gas and so on