Motorised valve

Abstract

To easily mount and demount a driving part and a valve element part. In this electric valve A which is composed of the driving part 10 and the valve element part 20 and wherein the valve element 30 mounted on the valve element part 20 is energized in a state of being projectable to a driving part 10 side by refrigerant pressure, a stopper 40 is mounted between a valve main body 21 and the valve element 30 for inhibiting the projection of the valve element 30, when the driving part 10 and the valve element part 20 are separated from each other. The stopper 40 is mounted between the valve main body 21 and a valve part 32 constituting the valve element 30. The stopper 40 comprises a main body contact part 43 and a valve element contact part 44, composed of an elastic material, the main body contact part 43 is locked on an inner face of the valve main body 21, and the valve element contact part 44 is locked on an outer peripheral part of the valve part 32.

Description

technical field [0001] The present invention relates to electric valves suitable for refrigerating cycles, etc., and more specifically, relates to electric valves suitable for controlling the flow of refrigerant in air conditioners or controlling the flow of combustion gas, air, warm water, liquid fuel, etc. in baths and showers. valve. Background technique [0002] Conventional electric valves generally consist of a valve body unit and a drive unit, both of which are detachable. This type of electric valve is described in, for example, the following patent document 1: Japanese Patent Application Laid-Open No. 11-82796. [0003] Next, the electric valve A described in this patent document 1 will be described with reference to FIG. 10 . The driving unit 10 is composed of a stepping motor, a reduction mechanism, etc., and is used to rotationally drive the output rotary shaft 19 . This rotational driving motion is converted into the vertical motion of the output rotary shaft 1...

AI Technical Summary

Problems solved by technology

[0006] Thereafter, in order to update or replace the drive unit 10, the refrigerant pressure may be applied to the electric valve A. In this state, the drive unit 10 may be detached from the valve body unit 20 or installed. However, In this case, it is not particularly difficult if the refrigerant pressure is low. In addition, when detaching the drive unit 10 from the valve body unit 20, since it is performed by loosening the nut 26 and separating it together with the nut 26, this Homework is not particularly difficult

[0007] However, when the refrigerant pressure is high, when the drive unit 10 is separated from the valve body unit 20, the bellows 33 will shrink due to the refrigerant pressure, and the valve body 30 will move upward as shown in FIG. 21 protruding above

Moreover, in this state, when the drive unit 10 is installed on the valve body unit 20 again, the operator needs to position the drive unit 10 on the upper part of the valve body unit 20, overcome the high refrigerant pressure, and place the valve body 30 It is very difficult to install while turning the nut 26 in the state of pushing down.

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