JPS5819872B2 - kuuki pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to air pumps, and more particularly to diaphragm-type air pumps.

Conventionally, in the above-mentioned diaphragm type air pump, an alternating magnetic field is generated in the solenoid by a commercial AC power supply. For example, when the solenoid is generating a positive magnetic field, this positive magnetic field causes the diaphragm to resist the force of the spring material. Some devices compress the air inside the diaphragm to send it out, and when the solenoid generates a negative magnetic field, the diaphragm expands due to the force of the spring material, drawing air into the diaphragm.

In such an air pump, the solenoid is excited by a commercial AC power supply, so if a 60Hz commercial AC power supply is used, the positive half cycle of V120 seconds (approximately 8.3 msec) is required to compress the diaphragm. ) However, although the expansion takes less than 1/120 f'J', which is a negative half period, the diaphragm does not become compressed again until after the negative half period has elapsed, and the capacity of the diaphragm is could not be fully demonstrated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a diaphragm-type air pump configured so that the compression and expansion cycles can be selected depending on the material of the diaphragm.

Hereinafter, the present invention will be explained in detail based on one embodiment shown in the drawings.

In the figure, reference numeral 12 denotes a support frame, which is provided at both ends of a flat plate 32 with walls 25 and 26 facing each other.

The base end of the spring material 13 is attached to the wall portion 25, and the spring material 13 is bent □ parallel to the flat plate 32 from the middle.

A support arm 4 is attached to the tip of this spring material 13, and the tip of the arm 4 is bent upward at right angles to form a support portion 14, and the permanent magnet piece 3 is attached to this with an S pole and a N pole downward. It is installed so that it is located above.

A solenoid 1 is attached to the wall portion 26 so as to face the permanent magnet piece 3.

This solenoid 1 has a solenoid coil 29, and when a positive voltage is applied to one end 21 and a negative voltage is applied to the other end, an N-pole magnetic field is generated at one end 11 of the solenoid 1 located below the permanent magnet piece 3. is wrapped around.

A diaphragm 6 is attached to the flat plate 32 of the support frame 12 so that a small cylindrical part 27 formed on the upper surface of the body part 31 so as to protrude upward is in contact with the middle of the support arm 4.

The thermal diaphragm 6 is made of a stretchable material, and a suction valve 9 and a discharge valve 10 are formed inside it.

7 is a discharge pipe, and 8 is a suction port. □One end 21 of the solenoid coil 29 is connected to the emitter of the transistor 16, and the collector of the transistor 16 is connected to the DC power supply 1.
Connected to the positive side of 7.

The other end 22 of the solenoid coil 29 is connected to a power switch 33.
It is connected to the negative side of the DC power supply 17 via.

Further, the base of the transistor is connected to the negative side of the DC power supply 17 via the capacitor 19 and the power switch 33, and is also connected to the positive side of the DC power supply 17 via the resistor 18.

A series circuit consisting of a resistor 20 and a switch 15 is connected in parallel to the capacitor 19, and this switch 15 is provided near the solenoid 1 and is open in the normal state, so that the magnetic field of the solenoid 1 reaches a predetermined value. When it becomes, it is closed.

Note that the values of the capacitor 18, the resistors 19 and 20, and the value of the magnetic field at which the switch 15 is closed are selected to satisfy the conditions described below.

The air pump configured in this manner operates as follows.

Now, the power switch 33 is open, the capacitor 19 is not charged, and the transistor 16 is non-conducting.
Assume that the diaphragm β is filled with air.

In this state, when the power switch 33 is closed in step 9),
Charging of capacitor 19 via resistor 18 is started.

When the charging voltage of the capacitor 19 reaches a value, the transistor 16 starts conducting, and a positive voltage is applied to one end 21 of the solenoid coil 29, and a negative voltage is applied to the other end 22.
An N-pole magnetic field is generated at one end of the solenoid 1.

Then, charging continues further and the solenoid coil 29
The voltage applied to □ increases, and accordingly, the thickness of the magnetic field generated at one end of the solenoid 1 also increases.

The S pole of the permanent magnet piece 3 is attracted to this magnetic field, and the spring material 13
The support arm 4 moves downward against the acting force of , the diaphragm 6 is compressed, the discharge valve 10 is opened, the suction valve 9 is closed, and air is sent out through the discharge pipe 7.

Here, the values of resistor 18 and capacitor 19 are such that transistor 16 is in a conductive state that allows solenoid 29 to apply the voltage required for solenoid 1 to generate the magnetic field necessary to completely compress diaphragm 6. With this selection, the diaphragm 6 can be completely compressed.

Since the switch 15 is configured to close in this completely compressed state, the capacitor 19 is discharged through the resistor 20, the transistor 16 becomes non-conducting, and the solenoid 1 is demagnetized.

At this time, the support arm 4 returns to its original position due to the force of the spring material.
The diaphragm 6 expands and air is drawn into the diaphragm 6.

Since the values of the resistor 20 and the capacitor 19 are selected so that the discharging of the capacitor 19 ends when the support arm 4 returns, charging of the capacitor 19 starts again when the support arm 4 returns, and as follows. , repeat the same operations as described above.

For example, if the diaphragm 6 and spring 4 are designed to be driven by a commercially available 60 Hz commercial AC power source, the charging time constant should be 8 mrn seconds and the discharging time constant should be 0.3 h. For example, the values of resistors 18, 20 and capacitor 19 are set to 800Ω and 30Ω, respectively.
When 0.01 μF was selected, sufficient compression and expansion were achieved.

In this case, the capacity of the pump will be twice that of driving the solenoid 1 once with a 60 Hz commercial AC power source.

□The air pump according to the present invention connects a series circuit of a transistor 16, a collector-emitter conductive path and a solenoid coil 29 to a DC power supply 17, and controls the conductivity of the transistor 16 with a charging circuit consisting of a resistor 18 and a capacitor 19. By controlling □ applying a voltage to the resolenoid coil 29 and selecting the time constant of the charging circuit such that the solenoid 1 generates the magnetic field necessary to compress the diaphragm 6 to the extent that the diaphragm 6 A discharge circuit consisting of a switch 15 and a resistor 20, which close in response to the magnetic field generated by the solenoid 1 when sufficiently compressed, is connected in parallel to the capacitor 19, and the time constant of the discharge circuit is set by the supporting arm. 4 is selected so that the discharge ends when the diaphragm 4 returns, so by selecting the time constants of the charging circuit and the discharging circuit according to the material of the diaphragm 5, compression and compression are performed at a cycle according to the material of the diaphragm 6.
It is possible to realize an air pump that can expand and has a higher capacity than conventional ones that can compress and expand only at predetermined cycles regardless of the material of the diaphragm.

[Brief explanation of the drawing]

The figure is a schematic diagram of an embodiment of an air pump according to the present invention. 1... Solenoid, 3... Permanent magnet piece, 4... Support arm, 6... Diaphragm, 12... Support frame (base ), 15...
Discharge switch, 16...Transistor (semiconductor element), 17...DC power supply, 18...
Charging resistor, 19... Capacitor, 20...
...discharge resistance, 29... solenoid coil.

Claims (1)

[Claims] 1. A diaphragm is provided on a substrate, the midway of the support arm whose base end is supported on the substrate via a spring material is brought into contact with the head of the diaphragm, and a permanent magnet is provided at the tip of the support arm, so that the diaphragm A solenoid is provided at a position that attracts the permanent magnet in the direction of compression, and a series circuit consisting of the coil of this solenoid, the output of the semiconductor element, and the conductive path between the common electrodes is connected to a DC power source, and a charging resistor and a capacitor are connected. A series circuit is connected in parallel to the series circuit, and the connection point between the charging resistor and the capacitor is connected to the control electrode of the semiconductor element, and when the solenoid is approached, the generated magnetic field sufficiently covers the diaphragm. A discharge switch that closes when the size reaches a size that can be compressed is provided, and a series circuit of this discharge switch and a discharge resistor is connected in parallel to the above capacitor, and when the above charging resistor and the above capacitor are used. A constant is selected to be longer than the time required for the solenoid to sufficiently compress the diaphragm by attracting the permanent magnet, and the time constant of the discharge resistor and the capacitor is set so that the support arm is controlled by the force of the spring material. An air pump characterized by being chosen longer than the time required for recovery.