Solenoid valve drive control device and solenoid valve comprising solenoid valve drive control device

Patent metadata

Field	Value
Publication number	US-10711912-B2
Application number	US-201615765612-A
Country	US
Kind code	B2
Filing date	Sep 3, 2016
Priority date	Oct 6, 2015
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

The invention is a solenoid valve drive control device of the invention, in which by controlling of the zero cross timing generation device 72, after application of the electric current to the solenoid 66 is started at zero cross timing by the switching device 68, when the current value that flows to the solenoid 66 detected by the electric current sensing device 78 reaches the circuit protection electric current value Ic (αA), a stabilization mode that repeats the ON-OFF cycle plural times (four times of the total in the Embodiment of FIG. 4), in which application of the electric current to the solenoid 66 is interrupted by the switching means 84, is operated (see A5-A8 in FIG. 4).

First claim

The invention claimed is:

1. A solenoid valve drive control device, in which
a plunger is moved by applying an electric current to a solenoid,
a valve element installed in the plunger is moved, attached to, and separated from a valve seat,
the valve element enters into a state of an open valve by separating from the valve seat and attaching to an attracting member when the electric current is applied, and
the valve element abuts the valve seat and enters into a state of a closed valve when the electric current is not applied,
the solenoid valve drive control device comprising,
a switching device that provides and interrupts the application of the electric current to the solenoid,
a zero cross timing generation device, that controls the application of the electric current to the solenoid by the switching device, so that the application of the electric current to the solenoid is started at first zero cross timing in a power supply period, and
an electric current sensing device that detects a value of the electric current that flows to the solenoid,
an attaching operation mode in which, when the value of the electric current that flows to the solenoid detected by the electric current sensing device reaches a predetermined circuit protection electric current value Ic (αA), which is a predetermined electric current value for attaching the plunger, after the application of the electric current to the solenoid is started by the switching device, the plunger is attached by applying a constant electric current which is set to the predetermined electric current value for attaching the plunger,
a stabilization mode that, after the attaching operation mode, repeats, plural times, an ON-OFF cycle, in which the application of the electric current to the solenoid is interrupted by the switching means when the value of the electric current that flows to the solenoid detected by the electric current sensing device reaches the circuit protection electric current value Ic (αA), after the application of the electric current to the solenoid is started at the zero cross timing by the switching device by controlling the zero cross timing generation device,
an interruption mode in which after the stabilization mode, the application of the electric current to the solenoid is interrupted by the switching means by controlling of the zero cross timing generation device when the value of the electric current that flows to the solenoid detected by the electric current sensing device reaches a predetermined electric current value Ia (βA), after the application of the electric current to the solenoid is started by the switching device at the zero cross timing, and
a hold mode in which, after the interruption mode, a holding power is generated by discharging an energy accumulated in the solenoid through a snubber circuit until a following zero cross timing, and the value of the electric current that flows to the solenoid is set to reach a predetermined holding electric current value Ib (γA) or more.

2. The solenoid valve drive control device as defined in claim 1 wherein the predetermined electric current value Ia(βA) is an electric current value when the plunger attaches to the attracting member after the application of the electric current to the solenoid is started at the zero cross timing.

3. The solenoid valve drive control device as defined in claim 1 wherein the holding electric current value Ib(γA) is an electric current value equal to or more than a holding electric current value capable of keeping the plunger attaching the attracting member.

4. The solenoid valve drive control device as defined in claim 1 wherein a dropout sensing device that detects dropout in which a state of the plunger is changed from a state of attachment to the attracting member in the hold mode is provided.

5. The solenoid valve drive control device as defined in claim 4 wherein the dropout sensing device is configured to measure a period of time until
the value of the electric current that flows to the solenoid detected by the electric current sensing means reaches the predetermined electric current value Ia(βA) since the application of the electric current to the solenoid is started, and
detect the dropout by determining whether the measured period of time is predetermined dropout detection time.

6. The solenoid valve drive control device as defined in claim 4 wherein
an electric current value when the application of the electric current to the solenoid is started at the zero cross timing is measured by an electric current sensing device, and
the dropout sensing means detects the dropout by determining whether the measured electric current value is the predetermined dropout detection electric current value Id(δA) or less.

7. The solenoid valve drive control device as defined in claim 1 , comprising a circuit protection means that interrupts the application of the electric current by the switching device in the attaching operation mode, when the value of the electric current that flows to the solenoid detected by the electric current sensing device reaches the predetermined electric current value Ic(αA).

8. A solenoid valve comprising the solenoid valve driving control device as defined in claim 1 .

Assignees

• Saginomiya Seisakusho Inc

Inventors

• Kanai Yuji
• Suzuki Ryusuke

Classifications

• H01F2007/1888

  using pulse width modulation · CPC title

• H01F7/1844 Primary

  Monitoring or fail-safe circuits (for relays H01H47/002) · CPC title

• F16K37/0041

  for measuring valve parameters (F16K37/0033 takes precedence) · CPC title

• F16K31/0675 Primary

  Electromagnet aspects, e.g. electric supply therefor · CPC title

• F16K31/0665

  with valve member being at least partially ball-shaped (F16K31/0662 takes precedence) · CPC title