Ranco Inc.

Robert T Marks

A refrigerant reversing valve assembly comprising a refrigerant reversing valve including a fluid pressure actuable reversing valving member for reversing the direction of refrigerant flow in a refrigeration system, a pilot valve unit for controlling actuation of the valving member comprising a pilot valve housing in fluid communication with the reversing valving member, an actuable pilot valving member in the housing, and pilot valve actuating means comprising a pilot valving actuating member plunger coupled to the pilot valving member, a guide tube surrounding the plunger connected to the pilot valve body and projecting therefrom, and a solenoid surrounding the guide tube for actuating the plunger, and supporting structure for interconnecting the reversing valve and the pilot valve unit. The supporting structure includes an anchoring panel rigidly fixed with respect to the reversing valve and rigidly fixed to the pilot valve unit for securing the reversing valve and pilot valve unit together with the plunger guide tube projecting away from the anchoring panel in a first direction, a rigid retainer panel detachably connected to the guide tube projecting end remote from the anchoring panel for maintaining said solenoid in position with respect to said guide tube between the panels, and coupling panels engaged between the anchoring and retainer panels.

Reversing valve assembly with improved pilot valve mounting structure

A refrigeration system including a refrigerant flow reversing valve. The flow reversing valve includes a valve housing providing a chamber communicating with a refrigerant compressor discharge via a first port and a bearing surface with second, third and fourth ports opening into it, the second port communicating with the compressor inlet. A valving member is disposed on the surface for sliding movement to communicate, respectively, the first and fourth and second and third ports when in one position and to communicate, respectively, the first and third and second and fourth ports in a second position. The valving member is formed by a rigid plastic body defining a cavity by which the second port is communicated with the respective third and fourth ports and a face surrounding the cavity extending generally parallel to the bearing surface. A thin sheet of polytetrafluoroethylene is interposed between the valving body face and the bearing surface to enable low friction movement of the valving member between its positions. The sheet and valving body face are mechanically attached to each other.

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Columbus, OH, United States of America

Robert T Marks