KR101521284B1 - The Solenoid Valve With Permanent Magnet - Google Patents

Abstract

The present invention relates to a solenoid valve with a permanent magnet and, more specifically, to a solenoid valve with a permanent magnet capable of remarkably reducing energy consumption required for opening and closing an inner flow passage of the valve or maintaining the open or closed state of the inner flow passage of the valve for a long time by including the permanent magnet on the upper end of a plunger and enabling an inner magnetic pole magnetized in an inner core of the valve to be easily converted into a desirable magnetic pole using a simple control circuit to magnetize the magnetic pole. The solenoid valve with the permanent magnet according to the present invention is characterized by including a valve body with an inlet and an outlet for a fluid and a flow passage between the inlet and outlet; a valve sheet opening and closing the flow passage of the valve body while moving upward and downward; a movable plunger of which the lower end is joined to the valve sheet and the upper end includes the permanent magnet having a predetermined length; the core formed into a ferromagnetic body on a spot on the upper side of the movable plunger at predetermined intervals and magnetized by an electromagnet force; a coil unit receiving operational power from outside to magnetize the core and magnetizing the magnetized magnetic pole of the core into one pole selected from an N pole or an S pole; and a restoring spring formed on one side of the lower part of the movable plunger and electrically supporting the movable plunger to be far away from the core.

Description

[0001] The present invention relates to a solenoid valve having a permanent magnet,

The present invention relates to a solenoid valve having a permanent magnet, and more particularly, to a solenoid valve having a permanent magnet at an upper end of a plunger, A solenoid valve having permanent magnets capable of remarkably reducing the power consumed when the in-valve flow path is opened or closed, or when the in-valve flow path is kept open or closed for a long time, .

Normally, a solenoid valve is installed in a pipe or vessel of a fluid such as water, oil, gas, air, or steam, and is used for interrupting or changing the flow of the fluid or controlling the flow rate thereof.

A conventional solenoid valve is a mechanism that combines a coil part formed by winding a coil into a cylindrical shape with a cylindrical iron core and a movable iron core sucked into the coil part. The current is supplied to the coil part, To the original position by the elastic force of the restoring spring, and to open and close the flow path by controlling the upward and downward movement of the plunger coupled with the movable core.

In the conventional solenoid valve having such a structure, in order to continuously maintain the flow path in the cut off state or the open state for a predetermined time, there is a problem that the current is continuously supplied to the coil portion, so that the power consumption is high. As shown in FIG. 1, in a valve body 110 in which a flow path is formed, a valve body 110 having a valve body 110, And a plunger 130 to which a valve seat 120 for opening and closing the flow path is coupled is provided at a lower end of the plunger 130. A first coil 140, a second coil 150, The first coil 140 and the second coil 160 are stacked and the core 170 is disposed on the upper side of the plunger 130. When power is applied to the first coil 140, The plunger 130 is pulled upward by the magnetic force of the magnetized core 170 to be brought into close contact with the core 170 so that the flow path is opened and the first coil Even when no current flows through the permanent magnet 160, the magnetization of the core 170 by the permanent magnet 160 The magnetic force of the core 170 of the permanent magnet 160 is attenuated by applying power to the second coil 150 so that the restoring spring 180 provided at the lower side of the plunger 180 The plunger 130 is moved downward by the restoring force of the plunger 130 to block the opened flow path so that the power consumption for maintaining the open state of the conventional flow path can be reduced.

The structure of the first coil 140, the second coil 150, and the permanent magnet 160 is stacked, the structure is complicated, and the length of the solenoid valve body is increased by the length of the stacking, And a control circuit for controlling energization of the currents flowing through the first coil 140 and the second coil 150 to control the upward and downward movement of the plunger 130 is complicated, have.

Patent No. 10-1155658 (entitled "Power Saving Solenoid Valve")

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an internal combustion engine capable of saving power consumption when the internal passage of the valve is kept open or closed for a long time,

It is possible to easily open and close the flow path in the valve by using the permanent magnet even with a simple configuration in the solenoid valve, to minimize the installation space with a compact configuration, and to provide a power saving type The solenoid valve can be easily manufactured, and the configuration of the control circuit for controlling the current passing through the coil portion can be simplified to facilitate manufacturing and maintenance.

According to an aspect of the present invention for solving the above-mentioned problems, there is provided a valve comprising: a valve body in which an inlet and an outlet are formed, and a flow path is formed between the inlet and outlet; A valve seat which opens and closes the flow path of the valve body while moving up and down; A movable plunger having a lower end coupled to the valve seat and an upper end having a permanent magnet of a predetermined length; A core provided at a position spaced a predetermined distance above the movable plunger and formed of a ferromagnetic material and magnetized by an electromagnetic force; A coil part magnetizing the core by receiving operation power from the outside and magnetizing the magnetic pole magnetized by the core into a selected magnetic pole of N pole or S pole; And a restoring spring provided at a lower side of the movable plunger and elastically supporting the movable plunger away from the core. [7] The solenoid valve according to claim 1,

A solenoid valve including a permanent magnet according to an embodiment of the present invention includes: a power supply unit for supplying power; A relay electrically connected in parallel with the power supply unit; A capacitor electrically connected in parallel with the relay and the coil portion, respectively; A diode electrically connected in series with the capacitor to block current from flowing to the relay; And a relay first contact switch and a relay second contact switch which are interlocked with each other by the relay to switch the polarity of the current flowing at both ends of the coil portion to a selected polarity,

The coil unit may include a charging coil for magnetizing the magnetic pole of the core into magnetic poles of N poles or S poles; And an open coil electrically connected in parallel to the charging coil and magnetizing the magnetic pole of the core to a magnetic pole of the other N pole or S pole, the power supply unit supplying power to the core; A relay electrically connected in parallel with the power supply unit; A capacitor electrically connected in parallel to the relay, the input coil, and the open coil, respectively; A diode electrically connected in series with the capacitor to block current from flowing to the relay; And a relay first contact switch activated by the relay to energize a current to any one of the input coil or the open coil.

The solenoid valve provided with the permanent magnet according to the present invention can reduce the power consumption consumed when the in-valve flow path is maintained in the open state or in the closed state for a long time. In the simple configuration of the solenoid valve, The flow path inside the solenoid valve can be easily opened and closed, and the installation space can be remarkably reduced with a compact structure in which the structure of the solenoid valve provided with the permanent magnet is simplified.

In addition, a power-saving solenoid valve equipped with a permanent magnet can be easily manufactured without greatly changing the configuration of the conventional solenoid valve, and the configuration of the control circuit for controlling the current passing through the coil portion can be simplified to facilitate manufacturing and maintenance .

1 is a sectional view showing a solenoid valve including a conventional permanent magnet;
2 is a sectional view of a solenoid valve including a permanent magnet according to the present invention;
FIGS. 3A and 3B are circuit diagrams showing one embodiment of a control circuit for controlling the energization current of a coil portion in a solenoid valve provided with a permanent magnet according to the present invention; FIG.
FIG. 4 is a cross-sectional view showing another form of a coil part including an open coil and an input coil in a solenoid valve provided with a permanent magnet according to the present invention; FIG. And
5A and 5B are circuit diagrams showing one form of a control circuit for controlling the energizing currents of the open coil and the input coil in a coil part constituted by the open coil and the input coil of Fig.

Hereinafter, embodiments of the present invention in which the above object can be specifically realized will be described with reference to the accompanying drawings. In describing the embodiments, the same names are denoted by the same reference numerals, and further description thereof will be omitted below.

2 is a cross-sectional view showing a solenoid valve provided with a permanent magnet 31 according to the present invention. The solenoid valve 1 having the permanent magnet 31 according to the present invention has a large A valve seat 20 that opens and closes the flow passage; a movable plunger 30 that is provided with a permanent magnet 31 on its upper side and moves up and down; A coil 40 for magnetizing the core 40 and a restoring spring 60 for resiliently supporting the movable plunger 30. The core 40 is fixed to the movable plunger 30, .

As shown in FIG. 2, the valve body 10 has a fluid inlet 11 and an outlet 12 formed on one side and the other side, respectively, and a fluid introduced from the inlet 11 flows into the outlet 11, The valve seat 20 is formed at a central portion of the valve body 10 so as to be able to flow out of the valve through the valve body 12, Is formed.

The valve seat 20 is coupled to a lower end of the movable plunger 30 and moves upward and downward together with the movable plunger 30 and moves upward and downward together with the movable plunger 30, The valve body 10 is separated or seated on the flow path opening / closing part 13 formed at the center of the valve body 10 to open or shut off fluid flow inside the valve body 10.

As shown in FIG. 2, the movable plunger 30 is formed into a rod shape capable of moving up and down inside the valve. The valve seat 20 is coupled to a lower end of the movable plunger 30, A permanent magnet 31 is provided. Although the movable plunger 30 may be formed of a metal material influenced by magnetic force, it is preferable that the magnetic force generated when the core 40 is in a magnetic state affects only the permanent magnet 31 A nonmetal material such as a synthetic resin having properties of a nonmagnetic material, or a metal material having a semiquantulosic property such as aluminum or an aluminum alloy. The flow path of the valve body 10 opens or closes the flow path while the valve seat 20 moving up and down together with the movable plunger 30 is separated or seated on the flow path opening and closing part 13. [

The core 40 is provided on a right side of a predetermined distance from the upper side of the permanent magnet 31 of the movable plunger 30. The core 40 is formed of a ferromagnetic material and is magnetized by an electromagnetic force generated when the neighboring coil part 50 is energized. (Magnetized). The core 40 magnetized in the same manner as the upper magnetic pole of the permanent magnet 31 or the magnetized core 40 is disposed so as to be spaced apart from the movable plunger 30 in the closed state of the in- The core 40 magnetized to the opposite polarity to the upper side magnetic pole of the permanent magnet 31 is in a state in which the passage in the valve is opened and the upper side of the permanent magnet 31 is in close contact with the lower side surface of the core 40 And the movable plunger 30 is moved to the upper side.

As shown in FIG. 2, the coil portion 50 is disposed at a predetermined distance from the periphery of the core 40. When the current is supplied from an external power source, 40). The coil part 50 provided in the conventional solenoid valve magnetizes the core 40 with a single magnetic pole while the coil part 50 according to the present invention is formed by the core 40 having the N pole or the S pole And when the core 40 is magnetized by the magnetic pole opposite to the upper side of the permanent magnet 31 among N pole or S pole, the permanent magnet 31 is pulled The movable plunger 30 is pulled toward the upper side where the core 40 is located and the valve seat 20 moves upward with the movable plunger 30 so as to be separated from the flow path opening / Thereby opening the flow path. On the other hand, when the core 40 is magnetized in the N pole or S pole with the same magnetic pole as the upper face of the permanent magnet 31, a repulsive force pushing the permanent magnet 31 is applied to move the movable plunger 30 And the valve seat 20 is moved downward together with the movable plunger 30 to be seated on the flow path opening and closing part 13 to close the flow path.

2, the restoring spring 60 is provided at a lower side of the movable plunger 30 so that the movable plunger 30 is moved away from the core 40, that is, So that the movable plunger 30 is elastically supported. The movable plunger 30 is positioned on the lower side spaced apart from the core 40 by the elastic force of the restoring spring 60 and the valve seat 20 Is seated on the flow path opening and closing part 13 to close the flow path inside the valve body 10. [ When the operating power is supplied from the outside to the coil part 50 and the current flows, the core 40 is magnetized by the opposite magnetic pole to the magnetic pole on the side of the permanent magnet 31 fixed at the time of initial installation, The movable core 30 and the core 40 together with the permanent magnet 31 pull the permanent magnet 31 with a force greater than the elastic force of the restoring spring 60 And the valve seat 20 is moved upward by the movable plunger 30 so as to be spaced apart from the flow path switching unit 13 to open the flow path. The permanent magnet 31 is brought into close contact with the core 40 by the magnetic force of the permanent magnet 31 even when the operating power is not supplied to the coil portion 50 after the permanent magnet 31 is brought into close contact with the core 40, The valve seat 20 can be maintained in an open state without consuming power in a state in which no current flows through the coil portion 50. [ On the other hand, the coil part 50 is wound around the core (50) with the same magnetic pole as the magnetic pole on the side of the permanent magnet (31) by flowing the current flowing in the coil part (50) The repulsive force pushing each other between the core 40 and the permanent magnet 31 acts on the movable plunger 40 by the resultant force of the repulsive force and the restoring elastic force of the restoring spring 60, The valve seat 20 which is coupled to the lower end of the movable plunger 30 is seated on the flow path opening and closing part 13 to close the flow path, The closed state of the flow path can be continuously maintained by the elastic force of the restoring spring 60 even when no current flows.

Figs. 3A and 3B are circuit diagrams showing one embodiment of a control circuit for controlling energization current of the coil section 50 in a solenoid valve provided with a permanent magnet 31 according to the present invention. Fig.

3A and 3B, a power supply unit 70 for supplying power, a relay 80 electrically connected in parallel to the power supply unit 70, A capacitor 71 electrically connected in parallel to the coil portion 50 and a diode 72 electrically connected in series with the capacitor 71 to block current from flowing to the relay 80, (+) Or negative (-) polarity of the current flowing in both ends of the coil section 50 by being interlocked with each other by the first contact switch 80, The polarity of the current flowing at both ends of the coil part 50 can be controlled through the energization control circuit of the coil part 50 including the coil contact part 81 and the relay second contact switch 82, The core (40) is electrically connected through a part (50) So it can be magnetized in a defined stimulus.

A description will be made of a method for opening and closing the flow path in the valve body 10 through the energization control circuit of the coil part 50 constructed as described above. Normally, the movable plunger 30 is urged downward by the elastic force of the return spring 60 And the valve seat 20 coupled to the lower end of the lower movable plunger 30 closes the flow path while being seated on the flow path opening and closing part 13. [ The relay 80 is operated by the On signal supplied from the power supply unit 70 and the capacitor 71 is charged as shown in FIG. The relay first contact switch 81 and the relay second contact switch 82 contact each other by interlocking to form a first line, and the coil portion 50 For example, an excitation current having a positive polarity is momentarily energized to magnetize the core 40 with a magnetic pole opposite to the magnetic pole on the upper surface of the permanent magnet 31 located above the movable plunger 30 The core 40 magnetized by the opposite magnetic pole to the permanent magnet 31 is attracted to the upper side by the attractive force larger than the elastic force of the restoring spring 60 so that the permanent magnet 31 is brought into close contact with the surface of the core 40, The movable plunger 30 and the valve seat (not shown) together with the permanent magnet 31 20 are also moved upward, the valve seat 20 is separated from the flow path opening and closing part 13, and the flow path is opened. Even when a current smaller than that in the initial opening operation is not energized or energized in the coil portion 50 after the passage is opened, the coil portion 50 is in close contact with the core 40 due to the magnetic force of the permanent magnet 31 The open state can be maintained continuously for a long time and the power consumed for maintaining the conventional state can be remarkably reduced and the magnetic force of the permanent magnet 31 is added to the magnetic force of the magnetized core, The movement of the movable plunger 30 can be easily controlled with lower power consumption than the movement of the movable plunger 30 only by the magnetic force of the magnetized core.

On the other hand, when the flow path is closed, as shown in FIG. 3B, the contact operation of the relay 80 is stopped by the Off signal that the power supplied from the power supply unit 70 is shut off, The contact switch 81 and the relay second contact switch 82 are connected to each other to form a second line and the current supplied from the capacitor 71 charged when the On signal is supplied to the second And the coil section 50 is magnetized with the same magnetic pole as the magnetic pole on the upper side of the permanent magnet 31 while the excitation current of negative polarity is instantaneously energized The core 40 and the permanent magnet 31 magnetized with the same magnetic pole as the permanent magnet 31 are repulsively energized to push the permanent magnet 31 downward together with the elastic force of the restoring spring 60 And the permanent magnet 31, The movable plunger 30 and the valve seat 20 to move up and also with the lower valve seat 20 is secured to the flow path opening and closing portion 13 is closed the flow path. After the flow path is closed, the closed state can be maintained by the elastic force of the restoring spring (60). As described above, the solenoid valve 1 provided with the permanent magnet 31 according to the present invention is configured such that the valve seat 20 is moved to the closed position only by the elastic force of the restoring spring 60, 40 and the permanent magnet 31, the valve seat 20 can be moved so as to be seated on the flow path opening / closing part 13 more quickly, thereby improving the valve responsiveness.

4 is a sectional view showing another form of the coil part 50 including the open coil 51 and the closing coil 52 in the solenoid valve provided with the permanent magnet 31 according to the present invention, 5A and 5B are diagrams showing the coil part 50 constituted by the open coil 51 and the closing coil 52 of FIG. 5 and controlling the current to be applied to the open coil 51 and the closing coil 52 And is a circuit diagram showing one form of the control circuit.

4, the coil portion 50 may be inserted into an input coil (not shown) for magnetizing the magnetic pole of the core 40 into any one of magnetic poles selected from N poles or S poles And the coil is formed so as to magnetize the core 40 to the N-pole, which is the same magnetic pole when a current flows through the coil, if the upper side magnetic pole of the permanent magnet 31 is N pole, And an open coil 51 for magnetizing the core 40 with a magnetic pole opposite to the magnetic pole for magnetizing the core 40 among the magnetic poles of N pole or S pole of the core 40, And an open coil 51 in which a coil is formed so as to magnetize the core 40 to the S pole which is an opposite magnetic pole when a current flows in the coil, if the upper side magnetic pole of the permanent magnet 31 is N pole and,

5A and 5B, a power supply unit 70 for supplying power, a relay 80 electrically connected in parallel to the power supply unit 70, a relay 80, And a diode 72 connected in series with the condenser 71 to block current from flowing to the relay 80. The diode 71 is connected to the coil 51, And a relay first contact switch (81) that is operated by the relay (80) to energize a current of any one selected coil of the input coil (52) or the open coil (51) The core 40 can be magnetized to a predetermined magnetic pole through another embodiment of the energization control circuit.

A method of opening and closing the flow passage in the valve body 10 through another embodiment of the energization control circuit constructed as described above will be described. Normally, the elastic force of the return spring 60 causes the movable plunger And the valve seat 20 connected to the lower end of the movable plunger 30 located at the lower side closes the flow path in a state of being seated on the flow path opening and closing part 13. [ 5A, the relay 80 is activated by the On signal supplied from the power supply unit 70, and at the same time, the capacitor 71 is charged, and the relay 80 , The relay first contact switch 81 contacts to form a third line, and a current flows to the open coil 51 provided on the third line, while the input coil 52 The current does not flow. The open coil 51 of the coil part 50 magnetizes the core 40 with a magnetic pole opposite to the magnetic pole on the upper surface of the permanent magnet 31 located on the upper portion of the movable plunger 30 And the subsequent channel opening operation is the same as that described above.

On the contrary, when the flow path is closed, as shown in FIG. 5B, the contact operation of the relay 80 is stopped by the Off signal of the power supplied from the power supply unit 70, The contact switch 81 is contact-reduced to form a fourth line, and a current flows to the input coil 52 without flowing into the open coil 51. A current supplied from the capacitor 71 charged when the power is turned on flows to the charging coil 52 along the fourth line and is supplied to the charging coil 52 of the coil part 50 ) Magnetizes the core 40 with the same magnetic pole as the magnetic pole on the upper side of the permanent magnet 31, and the subsequent flow channel closing operation is the same as described above.

As described above, the solenoid valve 1 equipped with the permanent magnet 31 according to the present invention can maintain the open state of the solenoid valve for a long time by the magnetic force of the permanent magnet 31, thereby remarkably reducing the power consumption. The solenoid valve 1 provided with the permanent magnet 31 according to the present invention controls the movement of the movable plunger 30 only by the magnetic force of the conventionally magnetized core, The movement of the movable plunger 30 can be easily controlled with low power consumption,

When switching from the closed state to the open state, the magnetic force of the permanent magnet 31 is added together with the magnetic force of the magnetized core 40 so that it can be quickly switched to the open state. When switching from the open state to the closed state, 60 and the magnetic force of the permanent magnet 31 are added, the valve can be quickly switched to the closed state, so that the responsiveness of the valve can be remarkably improved.

It will be apparent to those skilled in the art that, although several embodiments above have been illustrated by way of example, the present invention may be embodied in other forms without departing from its spirit and scope.

Accordingly, the above-described embodiments are to be considered illustrative and not restrictive, and all embodiments falling within the scope of the appended claims and their equivalents are intended to be included within the scope of the present invention.

1: Solenoid valve with permanent magnet
10: valve body 11: inlet
12: outlet 13:
20: valve seat 30: movable plunger
31: permanent magnet 40: core
50: coil part 51: open coil
52: closing coil 60: restoring spring
70: Power supply unit 71: Capacitor
72: Diode
80: Relay 81: Relay 1st contact switch
82: Relay 2nd contact switch

Claims (3)

A valve body in which an inlet and an outlet of the fluid are formed and a flow path is formed between the inlet and the outlet;
A valve seat which opens and closes the flow path of the valve body while moving up and down;
A movable plunger having a lower end coupled to the valve seat and an upper end having a permanent magnet of a predetermined length;
A core provided at a position spaced a predetermined distance above the movable plunger and formed of a ferromagnetic material and magnetized by an electromagnetic force;
A coil part magnetizing the core by receiving operation power from the outside and magnetizing the magnetic pole magnetized by the core into a selected magnetic pole of N pole or S pole;
A restoring spring provided at a lower side of the movable plunger to elastically support the movable plunger away from the core;
A power supply unit for supplying power;
A relay electrically connected in parallel with the power supply unit;
A capacitor electrically connected in parallel with the relay and the coil portion, respectively;
A diode electrically connected in series with the capacitor to block current from flowing to the relay; And
And a relay first contact switch and a relay second contact switch for interlocking with each other by the relay to switch the polarity of a current flowing at both ends of the coil portion to a selected polarity. Solenoid valve.
A valve body in which an inlet and an outlet of the fluid are formed and a flow path is formed between the inlet and the outlet;
A valve seat which opens and closes the flow path of the valve body while moving up and down;
A movable plunger having a lower end coupled to the valve seat and an upper end having a permanent magnet of a predetermined length;
A core provided at a position spaced a predetermined distance above the movable plunger and formed of a ferromagnetic material and magnetized by an electromagnetic force;
And an input coil which magnetizes the core by receiving an operating power from the outside and magnetizes the magnetic pole of the core into magnetic poles of N pole or S pole and is electrically connected in parallel with the input coil, A coil part provided with an open coil for magnetizing the magnetic pole of the N pole or the S pole to the other magnetic pole;
A restoring spring provided at a lower side of the movable plunger to elastically support the movable plunger away from the core;
A power supply unit for supplying power;
A relay electrically connected in parallel with the power supply unit;
A capacitor electrically connected in parallel to the relay, the input coil, and the open coil, respectively;
A diode electrically connected in series with the capacitor to block current from flowing to the relay; And
And a relay first contact switch which is operated by the relay to energize current to any one of the open coil and the input coil. delete

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