Stop type door closer

Abstract

The invention relates to a stop type door closer, which includes a main shell, a piston, a main spring, a first fluid passage, a second fluid passage and a removing unit. An inner cavity is formed inthe main shell, the piston is arranged in the inner cavity and connected to a connecting mechanism linked with opening and closing of a door, the main spring accumulates door closing energy through piston movement when the door is opened, a one-way valve is arranged in the first fluid passage and used for controlling fluid on the front side in the direction of piston movement to flow to the rear side of the direction of piston movement, a door closing valve is arranged in the second fluid passage, the second fluid passage is used for allowing the front side and the rear side of the direction of piston movement to communicate, when the door stops at any opening position within a set range of movement, the fluid pressure difference between the front side and the rear side of the direction ofpiston movement is maintained to maintain the stop state of the piston, and the differential pressure in the fluid is used for releasing the door closing valve; and the removing unit is used for removing the action of the second fluid passage, and the time of removing the stop state of the door is not limited, and is not limited to manpower door closing trigger removing.

Description

technical field [0001] The invention relates to a door closer, in particular to a stationary door closer. Background technique [0002] In the windows or doors of residential buildings, apartments, commercial buildings and other buildings, door closers are sometimes required. The door closers have springs for energy storage. When the door is opened, the springs accumulate energy; after the external force is released, the springs release the accumulated energy. The purpose of automatic door closing. [0003] In reality, there is a need for a door closer that can stop the door and maintain the open state after the door is opened, and needs to release the open state to close the door. [0004] The Chinese patent document whose publication number is "CN 102191899 A" discloses a "door closer", which Figure 2 to Figure 5 The shown embodiment is capable of stopping the door in any open position and closing the door after a time delay, but it has the disadvantage that it cannot ma...

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent document whose publication number is "CN 102191899 A" discloses a "door closer", which Figure 2 to Figure 5 The embodiment shown can stop the door in any open position and close the door after a delay, but it has disadvantages: it cannot keep the door in the open position for a long time, and it cannot close the door at any time

[0005] The Chinese patent document whose publication number is "CN 87 2 14794 U" discloses a "delayed automatic door closer with positioning function", which can stop the door at a relatively large angle and can stop for a long time, but its Disadvantages: the door can only be released by closing the door manually

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