Denso Corporation

Shimizu Industry Co., Ltd.

Other

Kousei Banno

Masahiro Ito

Chiharu Kamiya

Hiroyuki Saito

Masao Yasuno

An air passage switching system includes a switching door that is disposed rotatably in a case to open and close an air passage of the case. The switching door includes a door body, a rotation shaft provided in the door body, and a seal member made of an elastomer and adhering to an outer peripheral portion of the door body. The seal member contacts on a sealing surface of the case when the switching door closes the air passage. A plurality of recess portions are formed on the outer peripheral portion of the door body to be arranged in an outer peripheral direction. Thus, adhesion between the door body and the seal member can be strengthened.

Manufacturing method of air passage switching door

An air passage switching system includes a case forming an air passage having an opening portion, and a butterfly door for opening and closing the opening. The door includes a door body portion made of a material having a high rigidity, and a seal member attached to the door body. The seal member is made of an elastic material, and is formed into a thin-plate shape to extend from an outer peripheral portion of the door body portion toward an outer side. The seal member of the door is press-fitted to a case seal surface around the opening portion along a seal line (D), so that the opening portion is closed. The door is set in such a manner that an inner peripheral curvature radius (R,) of a corner portion of the case seal surface on the seal line is larger than an outer peripheral curvature radius (R,) of the seal member on the corner portion. Thus, the air passage switching system prevents air leak due to a deformation of the seal member while being produced in low cost.

Air passage switching system for air conditioner

An air passage switching system includes a case forming an air passage, and a butterfly door for opening and closing the air passage. The door includes a door body, a rotation shaft for rotating the door body, and a seal member attached to the door body. A link member is connected to a first end of the rotation shaft, and the first end of the rotation shaft is rotatably held in a shaft receiving portion of the case through the link member. A first cylindrical portion is formed in the door body concentrically with the rotation shaft at an outer peripheral side of the first end, and a second cylindrical portion protruding to a side of the door body is formed in the case. The first cylindrical portion and the second cylindrical portion are engaged so that a small gap is formed between an outer peripheral surface of the second cylindrical portion, and an inner peripheral surface of the first cylindrical portion and an end of the seal member. Further, the first and second cylindrical portions are overlapped in a longitudinal direction of the rotation shaft by a predetermined length. Thus, the door is air-tightly connected to the case around the rotation shaft, while it can prevent an operation force of the door from increasing.

Growing community of inventors

Obu, Japan

Kousei Banno