| 摘要 |
PURPOSE:To make it possible to obtain a sufficient cooling temperature by partially circulating a cold wind between an air conditioning unit and by providing a refrigerator evaporator, connected to a refrigerating cycle including an air conditioning evaporator, for a refrigerating chamber. CONSTITUTION:An air conditioning system 15 is provided with a blower 18 and an air-conditioning evaporator 19. The cold wind is partially supplied to a refrigerating chamber 9 through an intake duct 28 and is returned to the blower 18 through a return duct 29. The refrigerating chamber 9 is provided with a refrigerator evaporator 30. The inlet is provided before an automatic expansion valve 34 of the air-conditioning unit 15 while the outlet is provided at the outlet side of the air-conditioning evaporator 19. Furthermore, the volume of cold wind to be introduced into the refrigerating chamber 9 and the diameter and length of pipes at both inlet and outlet are so adjusted that the vapor pressure of the refrigerator evaporator 30 is made higher than that of the air-conditioning evaporator 19. With this construction, more effective cooling can be achieved by cloth the cold wind and the vaporization of refrigerant. |
