Patent ID: 8196232
Filing Date: 2012-06-12
Classification: E03D

Abstract:
1. Exhaust unit for a hanging toilet bowl, comprising: a house with a back wall and a front wall substantially parallel to the back wall; a first exhaust coupling tube extending in the house from the front wall to the back wall and having a first end projecting outside the house back wall; a second exhaust coupling tube extending in the house from the front wall to the back wall and having a first end projecting outside the house back wall; an opening made in an upper wall of the first exhaust coupling tube; an opening made in a wall of the second exhaust coupling tube; air suction and blow means; a suction channel extending from the opening in the wall of the first exhaust coupling tube to the air suction and blow means; a blow channel extending from the air suction and blow means to the opening in the wall of the second exhaust coupling tube, the blow channel provided with a blow channel valve being an operable valve adapted to let pass an air flow in the direction from the air suction and blow means to the second exhaust coupling tube but to block a water flow in the opposite direction; and operating means adapted to open or close the blow channel valve in dependence of the presence of water in the first exhaust coupling tube; wherein a center line of the second exhaust coupling tube is directed substantially parallel to a center line of the first exhaust coupling tube; wherein the first end of the second exhaust coupling tube has a diameter that is larger than the diameter of the first end of the first exhaust coupling tube; wherein the house has a mounting position wherein the back wall and the front wall are directed vertically and wherein the first exhaust coupling tube is situated vertically above the second exhaust coupling tube; wherein, at its second end situated opposite the first end, the first exhaust coupling tube is provided with a sealing ring arranged in a groove-shaped recess of the inner wall; and wherein, at its second end situated opposite the first end, the second exhaust coupling tube is provided with a sealing ring arranged in a groove-shaped recess of the inner wall.