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Electric actuator

A technology of electric actuators and motors, applied in motor control, direction control of AC motors, electrical components, etc., can solve the problems of forgetting to resume work, limited time for manual valve opening and closing, etc.

Inactive Publication Date: 2013-11-13
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, in this structure, after the maintenance is completed, the switch 13 must be turned on in order to return to the normal use state. , you may forget to restore the job
In addition, although it is conceivable to set a timer, according to the timing of the timer, the switch 13 after closing the valve will be turned on after a predetermined time has elapsed, but there is a problem that the time for manually opening and closing the valve is limited.

Method used

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Embodiment Construction

[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. figure 1 It is a circuit diagram showing main parts of one embodiment of the electric actuator of the present invention.

[0047] exist figure 1 Among them, 21 is an industrial power supply, 22 is a power switch, 23 is a constant voltage circuit that converts AC voltage into a specified DC voltage, 24 is a relay, and 25 is a motor that drives operating terminals (not shown) such as valves and dampers ( DC motor), 26 is the open side limit switch, 27 is the closed side limit switch, 28, 29 are the contacts of the relay 24 (relay contacts), 30 is the storage body (electric double layer capacitor), 31 is the equivalent For the switch with reset function of the switch unit in the present invention, 32 is a reset coil equivalent to the reset unit in the present invention, Tr1 is a transistor, and R1 and R2 are resistors.

[0048] In this electric act...

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Abstract

An electric actuator has a motor, an electricity storing body, a switch and a resetting unit. The switch is provided in a supply path of electric power from the electricity storing body to the motor. The switch opens the supply path for electric power from the electricity storing body to the motor, in response to an instruction from an operator. The resetting unit is operated through receiving a supply of electric power from the external power supply when the external power supply has been restored from being cut off. The resetting unit closes the switch that is provided in the supply path of electric power from the electricity storing body to the motor.

Description

technical field [0001] The invention relates to an electric actuator for driving the operating ends of valves and dampers. Background technique [0002] Conventionally, in air conditioners, in order to open and close the valves installed in the hot and cold water pipes of the air conditioners, and to adjust the opening degree of the dampers that increase or decrease the volume of conditioned air passing through the pipes and supplied to the air-conditioned area Instead use electric actuators. [0003] Such a general electric actuator has a motor inside the electric actuator, and operates according to a control command from an air-conditioning controller to set the opening degree of the operating end of a valve, damper, etc. to a set opening degree. [0004] In such an electric actuator, when the supplied power fails, the opening of the operating end will remain at the operating opening immediately before the power failure, and proper opening control will no longer be perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/04
CPCH02P3/02H02P29/025H02J9/061H02P23/24F16K17/36F16K31/04
Inventor 染谷秀明猿渡亮阿部卓司
Owner YAMATAKE HONEYWELL CO LTD
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