JPH0742104U - solenoid valve - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a solenoid valve that can quickly deenergize compared to the conventional one. A solenoid valve connected to a power source via an energizing / deactivating switch is characterized in that the energizing / deactivating switch is a semiconductor switching element having a discharge resistor 50 in parallel.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solenoid valve.

[0002]

[Prior art]

 FIG. 2 shows a conventional solenoid valve energizing circuit. In the figure, 10 is a converter for converting alternating current to direct current, 20 is an electromagnetic contactor, 21 is a contact of the electromagnetic contactor, and 21 is a coil of the electromagnetic contactor. 30 is a solenoid valve, 31 is the inductance of the coil, and 32 is the resistance. 40 is a flywheel diode.

In this configuration, the contact 21 of the electromagnetic contactor is closed when the electromagnetic valve 30 is energized, and the contact 21 of the electromagnetic contactor is opened when the electromagnetic valve 30 is deenergized.

[0004]

[Problems to be solved by the device]

 As described above, when the contact 21 of the electromagnetic contactor is opened to deactivate the electromagnetic valve 30, the energy stored in the coil is circulated through the flywheel diode, so that the valve opening is delayed.

Further, in the above example, since the electromagnetic contactor 20 is used, its maintenance is troublesome.

The present invention has been made to solve this problem, and an object of the present invention is to provide a solenoid valve that enables deenergization faster than before.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention uses a semiconductor switching element having a discharge resistance in parallel in a solenoid valve connected to a power source through an energizing / deactivating switch.

[0008]

[Action]

 In the present invention, when deenergized, the energy stored in the coil of the solenoid valve is not circulated but discharged through the discharge resistor.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 50 is a discharge resistor, and 60 is a semiconductor switching element (transistor in this example). The flywheel diode 40 is not included. In this configuration, when energizing the solenoid valve 30, the switching element 60 is set to ON and the discharge resistor 50 is short-circuited. When deenergizing the solenoid valve 30, the switching element 60 is turned off. The contact 21 of the electromagnetic contactor is opened.

When the switching element 60 is turned off, the energy stored in the coil of the solenoid valve 30 flows through the solenoid valve 30 → the converter 10 → the discharge resistance 30 → the solenoid valve 30 and is consumed by the discharge resistance 30. .

Therefore, as compared with the conventional case in which the above energy is consumed by the resistance of the coil of the solenoid valve 30, the solenoid valve 30 opens quickly.

[0013]

[Effect of device]

 As described above, according to the present invention, the solenoid valve is energized / deenergized by turning on / off the switching element, and the switching element is provided with a discharge resistor in parallel, so that the deactivation is quick and the energization is performed. The power consumption at time is extremely small.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a conventional energizing circuit of a solenoid valve.

[Explanation of symbols]

 10 power converter 30 solenoid valve 50 discharge resistance 60 semiconductor switching element

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic valve connected to a power source via an energizing / deactivating switch, wherein the energizing / deactivating switch is a semiconductor switching element having discharge resistors in parallel. valve.