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CN-122014867-A - Noise reduction assembly of electromagnetic valve, electromagnetic valve and control method

CN122014867ACN 122014867 ACN122014867 ACN 122014867ACN-122014867-A

Abstract

The invention provides a noise reduction assembly of an electromagnetic valve, which is matched with a framework, a solenoid, a valve cavity, a movable valve core, a fixed valve core and a metal outer frame of the electromagnetic valve, wherein the noise reduction assembly comprises a limiting structure for interfering the concave-convex matching process of the movable valve core and the fixed valve core when the electromagnetic valve is electrified, and a reset spring arranged between the movable valve core and the fixed valve core.

Inventors

  • LIN HANJI
  • Ji Shuitian
  • CHANG SHUAI

Assignees

  • 厦门微能电子科技有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (9)

  1. 1. The utility model provides a subassembly of making an uproar falls in solenoid valve, fall subassembly and skeleton (1), solenoid (2), valve pocket (3), move case (4), decide case (5) and metal frame (6) cooperation of solenoid valve, a serial communication port, fall the subassembly of making an uproar including being used for interfering limit structure (7) that moves case (4) and decides case (5) unsmooth cooperation process to and set up reset spring (8) between moving case (4) and deciding case (5), through the interference of limit structure (7), the cooperation process of moving case (4) and deciding case (5) includes: the first working state is that after the electromagnetic valve is powered off, the movable valve core (4) is reset by the reset spring (8), and the movable valve core (4) and the fixed valve core (5) are positioned at a power-off reset reference position; In the second working state, after the electromagnetic valve is electrified, the movable valve core (4) moves to the fixed valve core (5) along the valve cavity (3) until the movable valve core (4) and the fixed valve core (5) stop moving relatively, and a buffer gap (9) is arranged between the movable valve core (4) and the fixed valve core (5); The buffer clearance (9) is a movable stroke quantity L which axially faces to the fixed valve core (5) when the movable valve core (4) is not constrained, the movable stroke quantity L is more than or equal to K (D-epsilon) (wherein K is a dimensionless proportional coefficient, the numerical value is 0.25, the dimensionless stroke quantity is a dimensionless correction term, the numerical value is 3, the unit is mm, the D is the diameter of the movable valve core (4), the unit is mm, the D is more than or equal to 4mm, the L is the movable stroke quantity, the unit is mm), and the reset spring (8) is connected with the movable valve core (4) and is used for driving the movable valve core (4) to reset to the first working state stably from the second working state and adapting the linear control of the movement of the valve core.
  2. 2. The noise reduction assembly of the electromagnetic valve according to claim 1, wherein when the electromagnetic valve is electrified and sucked, the fixed valve core (5) and the metal outer frame (6) have radial magnetic attraction, the movable valve core (4) deflects, and the movable valve core is clung to one side of the inner wall of the framework (1) to form suction damping.
  3. 3. A noise reducing assembly of a solenoid valve according to claim 1, characterised in that the limit structure (7) is arranged in the valve chamber (3).
  4. 4. A noise reducing assembly of a solenoid valve according to claim 3, characterised in that the limit structure (7) is at least one stop (71) arranged axially along the valve chamber and/or is a first seal (72) arranged at the end of the moving spool (4) remote from the fixed spool (5) and/or is a second seal (73) arranged between the moving spool (4) and the fixed spool (5).
  5. 5. The noise reduction assembly of the electromagnetic valve according to claim 4, wherein the first sealing member (72) is a buffer sealing gasket, the second sealing member (73) is arranged at one end of the movable valve core (4) close to the fixed valve core (5), or is arranged at one end of the fixed valve core (5) close to the movable valve core (4), or is arranged in the valve cavity (3) between the movable valve core (4) and the fixed valve core (5), and the second sealing member (73) is a buffer gasket or a buffer sealing gasket.
  6. 6. A noise reducing assembly of a solenoid valve according to claim 1, characterised in that said return spring (8) is a straight variable density spring or a tower spring.
  7. 7. A solenoid valve comprising a noise reduction assembly of the solenoid valve of any one of claims 1-6.
  8. 8. The control method of the electromagnetic valve according to claim 7, wherein the driving power of the electromagnetic valve is divided into three gears of reset power, holding power and rated power, and the reset power is smaller than or equal to the holding power < the rated power, characterized in that the control method comprises actuation control and reset control: the actuation control is that the driving power is gradually adjusted from the initial power to the rated power after the power is on, the initial power is more than 0 and less than the holding power, the movable valve core (4) moves to the fixed valve core (5) under the linear adaptation action of the actuation damping, the buffer clearance (9) and the reset spring (8), and the driving power is switched to the holding power to continuously work after the actuation of the movable valve core (4) is completed; And (3) resetting control, namely firstly adjusting the driving power from the holding power to 0 power, and stably resetting the movable valve core (4) to a first working state under the linear driving of a reset spring (8) in the power gradual change process.
  9. 9. A control method of an electromagnetic valve according to claim 8, characterized in that the holding power is 40% -60% of the rated power.

Description

Noise reduction assembly of electromagnetic valve, electromagnetic valve and control method Technical Field The invention relates to the technical field of electromagnetic valves, in particular to a noise reduction assembly of an electromagnetic valve, the electromagnetic valve and a control method. Background Electromagnetic valves are used as core components for fluid control and widely applied to industrial production and civil equipment, but the prior art has three core pain points, and the electromagnetic valves are particularly remarkable in the scenes of silence and outstanding energy-saving requirements; The valve core of the traditional electromagnetic valve is attracted and reset by a single spring, the valve core is easy to generate axial movement under the alternating action of electromagnetic force and spring force, and is rapidly and rigidly impacted with a valve seat or a limiting part after being separated from a guide structure, the noise can reach more than 50dB even in an industrial scene, and in a silent sleeping environment, the noise of more than 40dB can interfere the sleeping process, and the deep sleeping period is damaged. In order to solve the problems, the invention provides a noise reduction assembly of an electromagnetic valve, the electromagnetic valve and a control method. Disclosure of Invention In order to solve the problems, the technical scheme of the invention is as follows: The utility model provides a subassembly of making an uproar falls in solenoid valve, the subassembly of making an uproar with skeleton, solenoid, valve pocket, move case, decide case and metal frame cooperation of solenoid valve, its characterized in that falls the subassembly of making an uproar including being used for interfering the limit structure of moving case and deciding the unsmooth cooperation process of case and setting up in moving the reset spring between case and the deciding the case, through limit structure's interference, the cooperation process of moving case and deciding the case includes: the first working state is that after the electromagnetic valve is powered off, the movable valve core is reset by the reset spring, and the movable valve core and the fixed valve core are positioned at a power-off reset reference position; The second working state is that after the electromagnetic valve is electrified, the movable valve core moves to the fixed valve core along the valve cavity until the movable valve core and the fixed valve core stop moving relatively, and a buffer gap is arranged between the movable valve core and the fixed valve core; The buffer clearance is a movable stroke quantity L of the movable valve core towards the fixed valve core along the axial direction when the movable valve core is not constrained by any constraint, the movable stroke quantity L is more than or equal to K (D-epsilon) (wherein K is a dimensionless proportionality coefficient, the numerical value is 0.25, no unit is provided, epsilon is a dimensionless correction term, the numerical value is 3, the unit is mm, D is the diameter of the movable valve core, the unit is mm, the D is more than or equal to 4mm, and L is the movable stroke quantity, the unit is mm), and the reset spring is connected with the movable valve core and is used for driving the movable valve core to reset to the first working state from the second working state stably and adapting the linear control of the movement of the valve core. Further provided is that: When the electromagnetic valve is electrified and attracted, the fixed valve core and the metal outer frame have radial magnetic attraction, and the movable valve core generates deflection and is clung to one side of the inner wall of the framework to form attraction damping. Further provided is that: the limiting structure is arranged in the valve cavity. Further provided is that: The limiting structure is at least one clamping block axially arranged along the valve cavity, and/or is a first sealing element arranged at one end of the movable valve core far away from the fixed valve core, and/or is a second sealing element arranged between the movable valve core and the fixed valve core. Further provided is that: The first sealing piece is a buffer sealing gasket, the second sealing piece is arranged at one end of the movable valve core, which is close to the fixed valve core, or at one end of the fixed valve core, which is close to the movable valve core, or in the valve cavity between the movable valve core and the fixed valve core, and the second sealing piece is a buffer pad or a buffer sealing gasket. Further provided is that: the return spring is a straight cylinder variable density spring or a tower type spring. A solenoid valve comprising a noise reduction assembly of the solenoid valve of any one of claims 1-7. Based on the control method of the electromagnetic valve, the driving power of the electromagnetic valve is divided into three gears of reset power, hold