| 摘要 |
<p>PURPOSE:To control the upper limit of the oxygen concentration in the car compartment by installing a partial pressure regulating means which regulates the partial pressure difference between the both interface parts of an oxygen concentrating membrane which is formed by a partial pressure difference generating means, to a prescribed value or less. CONSTITUTION:In an oxygen concentrating device 70, the space in a hollow body 81 in which oxygen concentrating membranes 82 are laminated communicates to the suction side of a vacuum pump 71 through an oxygen leading-out duct 77, and an oxygen feeding duct 74 to the car compartment is connected onto the discharge side of the vacuum pump 71. The vaccum pump 71 generates a partial pressure difference state between the air feeding side interface part and the oxygen taking-out interface part of the oxygen concentrating membrane 82. In the above-described air conditioner, an outside air introducing duct 88 is installed onto the oxygen leading-out duct 77, and a negative pressure control valve 89 is installed onto the outside air introducing duct 88. When the intake negative pressure of the vaccum pump 71 becomes over a prescribed value, outside air is introduced into the above-described duct 77 by opening the above-described valve 89, and the excessive concentration of oxygen is prevented.</p> |
