| 摘要 |
PURPOSE:To improve the electric efficiency of miniaturized cold heat element by contacting the freezing mixture of refrigerant gas and refrigerant powder with the cooling surface of a multi-stage bridge type cold heat element. CONSTITUTION:An upper cold heat element is fixed to the center of a second stage cold heat element to connect it to a third stage cold heat element at the center of the lower part of the second stage cold heat element, then a fourth stage cole heat element is connected to the center of the lower part of the third stage cold heat element to obtain a four-stage bridged cold heat element. A pad, obtained by cooling a cold heat keeping bag or a freezing mixture bag 7 to -3--10 deg.C, is laid on a heating surface below a cold heat element plate 5, then the cold heat element is put thereon statically. Aluminum sheets, a stainless steel sheet 8 are fitted into the upper lid box 9 of a heat insulating box Q, then a middle sheet of aluminum sheet 8' is fixed to the upper surface of the box 10, then, a material to be cooled 11 is inserted into the lower lid box 10 to shield it by the middle sheet 8' and keep cold heat. When cold heat element four-stage bridged body Q is used, a primary heat exchanger for refrigerant gas is contacted with the surface of the cooling plate while a secondary heat exchanger is connected to the bottom surface of the heating plate. |
