Indoor and outdoor ventilation device

Abstract

An indoor and outdoor ventilation device includes a fan, an air inlet casing, and an exhaust window. The fan is installed on an indoor side. The air inlet casing and the exhaust window installed on an outdoor side. An air inlet and an air outlet are arranged on the air inlet casing. The fan is communicated with the air outlet. A filter net and an air filter are sequentially installed in the air inlet casing from the air inlet to the air outlet. The exhaust window is mounted on a wall body for communication with indoor air and outside air.

1 . An indoor and outdoor ventilation device, comprising a fan, an air inlet casing and an exhaust window; wherein:
 the air inlet casing is adapted to be installed on an outdoor side, and an air inlet and an air outlet are arranged on the air inlet casing, a filter net and an air filter are sequentially installed in the air inlet casing from the air inlet to the air outlet;   the fan is adapted to be installed on an indoor side, and the fan is communicated with the air outlet; and   the exhaust window is mounted on a wall body to vent indoor air to an outside.   
     
     
         2 . The indoor and outdoor ventilation device according to  claim 1 , wherein a one-way valve is arranged on the exhaust window, and the indoor air flows to the outside through the one-way valve. 
     
     
         3 . The indoor and outdoor ventilation device according to  claim 1 , wherein the exhaust window and the fan are respectively mounted on opposite wall bodies. 
     
     
         4 . The indoor and outdoor ventilation device according to  claim 1 , wherein the air inlet is located at a bottom of the air inlet casing. 
     
     
         5 . The indoor and outdoor ventilation device according to  claim 1 , wherein the air filter is detachably mounted on the air inlet casing. 
     
     
         6 . The indoor and outdoor ventilation device according to claim  5 , wherein an insertion opening is arranged on the air inlet casing, and the air filter is inserted into the air inlet casing through the insertion opening. 
     
     
         7 . The indoor and outdoor ventilation device according to  claim 6 , wherein a latch is mounted on the air inlet casing near the insertion opening, the latch includes a socket and a plug, the socket is fixed on the air inlet casing, and the plug is sealed at the insertion opening in a state where the plug protrudes from the socket.