Ventilating device

Abstract

A ventilating device includes a housing; a gas concentration detector; a passage portion defining an outside air passage and an inside air passage; a permeable membrane disposed at an interface between the outside air passage and the inside air passage; an air sending portion to generate at least one of a flow of outside air in the outside air passage and a flow of inside air in the inside air passage; and a controller. The controller controls at least one of the flow of inside air and the flow of outside air by controlling the air sending portion, based on a gas concentration of a predetermined gas detected by the gas concentration detector.

1 . A ventilating device comprising:
 a housing, a temperature of inside air of the housing being to be controlled;   a gas concentration detector to detect a gas concentration of a predetermined gas in the housing;   a passage portion defining
 an outside air passage through which outside air of the housing flows, and 
 an inside air passage through which inside air of the housing flows; 
   a permeable membrane disposed at an interface defined between the outside air passage and the inside air passage in a manner that a first face of the permeable membrane contacts the outside air flowing through the outside air passage and that a second face of the permeable membrane contacts the inside air flowing thorough the inside air passage, gas permeating the permeable membrane selectively between the outside air passage and the inside air passage;   an air sending portion to generate at least one of a flow of the outside air in the outside air passage and a flow of inside air in the inside air passage; and   a controller to control the air sending portion, wherein   the controller controls at least one of the flow of the inside air and the flow of the outside air by controlling the air sending portion, based on the gas concentration of the predetermined gas detected by the gas concentration detector.   
     
     
         2 . The ventilating device according to  claim 1 , further comprising:
 an inside air circulation blower to circulate inside air in the housing, wherein   the air sending portion generates the flow of inside air in the inside air passage by introducing a flow of inside air generated by the inside air circulation blower.   
     
     
         3 . The ventilating device according to  claim 1 , further comprising:
 a power transmitter, wherein   the air sending portion has
 an inside air sending portion to generate a flow of inside air in the inside air passage, and 
 an outside air sending portion to generate a flow of outside air in the outside air passage, 
   the inside air sending portion has an air-sending fan and a driving portion to drive the fan to rotate,   the outside air sending portion is rotated by a rotation force of the driving portion transmitted through the power transmitter.   
     
     
         4 . The ventilating device according to  claim 1 , wherein
 the permeable membrane has a pore, and   the pore has a diameter equal to or smaller than a mean free path of the predetermined gas.   
     
     
         5 . The ventilating device according to  claim 1 , further comprising:
 a condenser in which heat is exchanged between a high temperature refrigerant and outside air; and   an evaporator in which heat is exchanged between a low temperature refrigerant and inside air, wherein   the air sending portion has
 an inside air sending portion to generate a flow of inside air in the inside air passage, and 
 an outside air sending portion to generate a flow of outside air in the outside air passage, 
   the outside air sending portion is a fan of the condenser that sends outside air into the condenser, and   the inside air sending portion is a fan of the evaporator that sends inside air into the evaporator.   
     
     
         6 . The ventilating device according to  claim 5 , wherein
 the permeable membrane is arranged downstream from the evaporator in an air flow and is arranged upstream from the condenser in an air flow.   
     
     
         7 . The ventilating device according to  claim 5 , further comprising:
 a bypass passage portion to bypass the condenser so as to supply outside air for the outside air passage, and   the permeable membrane is arranged downstream from the evaporator in an air flow and is arranged downstream from the condenser in an air flow.