JPH09144662A - Fluid pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid pump operated by an operating membrane (diaphragm) which is minimized in vibration and noise and easily miniaturized by fixing a magnetic body to the operating membrane, and driving the magnetic body by an electromagnetic coil body. SOLUTION: Cup-like operating membranes 13, 14 are mounted on both sides of a body part 10, and permanent magnets 15, 16 are mounted and fixed to the operating membranes, respectively. The permanent magnets 15, 16 are arranged opposite to the magnetic poles 17a, 18a of electromagnetic coil bodies 17, 18. AC is applied to the electromagnetic coil bodies 17, 18, whereby the operating membranes are protruded and recessed to move air from an inflow port 11 to an outflow port 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pump,
In particular, the present invention relates to a pump structure suitable as an air pump for a fish tank for ornamental fish.

[0002]

2. Description of the Related Art Conventionally, as an air pump for an aquarium for watching fish, as shown in FIG.
A flexible bowl-shaped actuating film (diaphragm) 6 made of a rubber film or the like is provided on the main body 60 having the inflow port 61 and the outflow port 62.
3 is attached so that the operating membrane 63 faces the flow passage formed inside the main body 60.

A mounting member 64 is mounted on the operating film 63, and a substantially central portion of the drive arm 65 is engaged with the mounting member 64. A base end 65a of the drive arm 65 is fixed to a fulcrum portion 67 of a case body (not shown) via a cushioning member 66 such as a rubber tube. A permanent magnet 68 is fixed to the tip 65b of the drive arm 65, and the permanent magnet 68 is arranged to face the magnetic pole 69a of the electromagnetic coil body 69.

In this air pump, when the electromagnetic coil body 69 is driven by alternating current power, the N pole and the S pole are alternately excited by the magnetic pole 69a, so that the permanent magnet 68 reciprocates left and right by the magnetic force. Due to the reciprocating motion of the permanent magnet 68, the operating film 63 moves in and out through the drive arm 65 and the mounting member 64, and the inflow and outflow port 61 is caused by this operation.
The air is drawn into the inside of the main body portion 60 from the inside, and the air inside the main body portion 60 is discharged from the outflow port 62.

[0005]

In the above air pump, unless the size of the electromagnetic coil body 69 or the length of the driving arm 65 is secured to some extent, the driving force and the driving stroke for moving the operating film 63 in and out are sufficient. Therefore, there is a problem that it is difficult to downsize the pump.

Further, since the drive arm 65 reciprocates, vibration is propagated to the case body even if the cushioning member 66 is interposed, and it is difficult to reduce vibration and noise during operation. There is a problem. In order to reduce this vibration and noise, two pumps shown in FIG. 6 may be arranged so as to oppose each other, and the operation directions of the drive arms 65 may be reversed to drive the pumps so that they are in the same phase. In this case, the vibration itself is slightly reduced, but the noise is rather increased, and since the two pumps are built in, it is against the miniaturization.

Therefore, the present invention is to solve the above-mentioned problems, and an object thereof is to realize a novel structure capable of reducing the size of a pump and reducing vibration and noise during operation.

[0008]

Means for Solving the Problems The means taken by the present invention to solve the above problems is a main body provided with a one-way valve for regulating the flow direction of fluid in the middle of a flow passage from an inlet to an outlet. Section, a flexible actuating membrane that is attached to the main body and faces the flow passage, a magnetic body that is adopted in the actuating membrane itself or is fixed to the actuating membrane, and a magnetic pole at a position facing the magnetic body. And an electromagnetic device having a magnetic field, and the magnetic body is moved together with the actuation film by driving the electromagnetic device so that the fluid flows from the inflow port to the outflow port through the flow passage. It is a thing.

According to this means, since the magnetic material is used for the actuating film itself or the magnetic material is fixed to the actuating film, the conventional drive arm is not required, the miniaturization is facilitated, and the flexible structure is provided. Vibration and noise are reduced because only the flexible operating film moves in and out. Further, since the number of parts is reduced and the mounting structure of parts is simplified, the manufacturing cost can be reduced.

Here, a pair of the operating films and the magnetic poles are arranged so as to oppose each other so as to be arranged in the projecting and retracting direction, and the magnetic films and the magnetic poles deform the pair of operating films in mutually opposite directions. It is preferable to drive the electromagnetic device as described above. In this case, since the actuating membranes deform in the opposite direction, they act so as to cancel out the vibrations and noises, so that the vibrations and noises can be further reduced.

In this case, further, the pair of magnetic poles may be provided at both ends of the electromagnetic device, and the pair of body portions having the pair of actuating membranes may be provided at both sides of the electromagnetic device.
In this case, since one electromagnetic device can be provided with a pair of magnetic poles and two pump bodies can be provided, the drive efficiency and volumetric efficiency of the pump body can be improved.

In some cases, a pair of the electromagnetic devices having the pair of magnetic poles are provided, and the main body having the pair of actuation films on both sides is arranged between the pair of electromagnetic devices. In this case, since the main body is arranged in the center, the sources of vibration and noise can be concentrated at the central position, so that it is possible to easily take measures to reduce vibration and noise.

Further, there may be a case in which a pair of the electromagnetic devices each having the pair of magnetic poles are provided, and a pair of the main body portions with the actuating film facing the both sides are arranged between the pair of electromagnetic devices. In this case, even if two pump bodies are provided, the sources of vibration and noise can be concentrated at the center position, so that it is possible to easily take measures to reduce vibration and noise.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a fluid pump according to the present invention will be described with reference to the accompanying drawings. Each of the embodiments described below shows an example in which the air pump is formed as an ornamental fish air pump, but the present invention is not limited to such a case, and is used in various applications for delivering various fluids other than air. It can be applied to the fluid pump of.

(First Embodiment) FIG. 1 shows the structure of the main part of an air pump according to the first embodiment. This air pump is
A main body 10 made of hard resin, operating films (diaphragms) 13, 14 made of soft resin or rubber attached to the left and right sides of the main body 10, and electromagnetic coil bodies arranged on the left and right of the operating films 13, 14. It is roughly composed of 17 and 18.

The main body 10 has an inlet 11 and an outlet 1.
2 is provided, and a one-way valve 11a formed to allow air to flow only from the outside to the internal space A is attached to the inflow port 11 and allows air to flow only from the internal space A to the outside at the outflow port 12. The formed one-way valve 12a is attached. Flange portions 10a and 10b having openings inside are formed at the left and right end portions of the main body portion 10, and bowl-shaped actuating membranes 13 and 14 are attached to the flange portions 10a and 10b, respectively. Is configured to be completely closed.

The mounting portion 1 is provided on the inner surface of the left end portion of the operating membrane 13.
3a is formed, and the disk-shaped permanent magnet 15 is fixed to the mounting portion 13a. Similarly, a mounting portion 14a is formed on the inner surface of the right end portion of the operating film 14, and a disk-shaped permanent magnet 16 is fixed to the mounting portion 14a.

Magnetic poles 17a and 18a of electromagnetic coil bodies 17 and 18 are arranged at positions facing the permanent magnets 15 and 16 with the left and right ends of the operation films 13 and 14, respectively.
At the time of driving, an alternating voltage is supplied to the electromagnetic coil bodies 17 and 18, respectively, and the magnetic poles 17a and 18a thereof receive N
The poles and the S poles are excited alternately. Here, instead of the two electromagnetic coil bodies 17 and 18, one electromagnetic coil body formed by using a single electromagnetic coil and a U-shaped iron core may be used. In this case, since the two magnetic poles have opposite polarities, the polarities of the surfaces of the two permanent magnets facing the magnetic pole must also have opposite polarities.

In this air pump, the permanent magnet 15
And electromagnetic coil body 17, permanent magnet 16 and electromagnetic coil body 18
Thus, the actuating films 13 and 14 are driven so as to deform in opposite directions. That is, in this embodiment, the actuation membranes 13 and 14 are in phase (ie, actuation membrane 13).
Is protruding, the operating film 14 is also protruding, and the operating film 1
3 is submerged, the operating film 14 is also submerged). By operating in this way, when the operating membranes 13 and 14 are deformed to the protruding side, the one-way valve 12a is closed because the internal space A is expanded, but the one-way valve 11a is opened and the one-way valve 11a is opened from the outside from the inlet 11. When the air flows in and the operating membranes 13 and 14 are deformed to the submerged side, the one-way valve 11a is closed because the inner space A is contracted, but the one-way valve 12a is opened and the inner space A from the outlet 12. Air flows out from the outside. By repeating this, the outlet 12
From this, air is sequentially discharged.

In this embodiment, since the permanent magnets (may be a simple magnetic body) are fixed to the operation membranes 13 and 14, the drive arm is unnecessary, the volume of the entire pump can be remarkably reduced, and the size can be reduced. be able to. Further, since the magnetic force can be directly transmitted to the operating films 13 and 14, the pump can be efficiently driven without generating unnecessary vibration or noise. In particular, since the operating film is made of a flexible material, the operating portion is only a flexible portion, and the generation of vibration and noise is significantly reduced compared to the conventional one. Furthermore, since the number of constituent parts can be reduced, the number of parts to be mounted on the case body and the like can be reduced, and the manufacturing cost can be reduced, such as the ease of manufacturing and assembling the parts. In particular, the actuating membranes 13 and 14
Since they always operate in the opposite directions, there is an effect of canceling out vibration and noise, and it is possible to reduce vibration and noise.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. This embodiment is roughly configured by a main body portion 20 having an inflow port 21 and an outflow port 22, an actuation film 26 connected thereto, and an electromagnetic coil body 28 arranged to face the actuation film. The main body portion 20 has an inflow passage 20a extending from the inflow port 21 along its axis and penetrating toward the inner side of the operating film 26, and an opening portion around the inflow passage. Outflow passage 20b formed around the cylindrical wall defining 20a and communicating with the outlet 22
Are formed.

A disc-shaped support frame 23 is fitted on the side of the operation membrane 26 of the main body 20. In the support frame 23,
A shaft hole 23a is formed in the central portion, and peripheral holes 23b are formed in several places around the shaft hole 23a. Shaft hole 23
a is the opening of the inflow passage 20a, and the peripheral hole 23b is the outflow passage 2
It faces the opening of 0b. A flexible inflow valve seat 24 made of a thin rubber plate or the like is provided on the front and back of the support frame 23.
And the outflow valve seat 25 includes the inner wall of the main body 20 and the support frame 2.
It is sandwiched between 3 and.

The inflow valve seat 24 has a slit 24a at a position corresponding to the opening of the outflow passage 20b, and the outflow valve seat 25 is at a position corresponding to the opening of the inflow passage 20a.
5a. The inflow valve seat 24 normally closes the shaft hole 23a of the support frame 23, and is pushed and deformed by the working film 26 side only when air is sucked in from the inflow port 21 to open the inflow passage 20a in one direction. Functions as a valve. The outflow valve seat 25 normally has a peripheral edge hole 23b of the support frame 23.
And functions as a one-way valve that opens only when the air is pushed out from the side of the actuating membrane 26 to the outlet 22 and opens the outflow passage 20b.

An attachment portion 26a similar to that of the first embodiment is formed inside the operating film 26, and a permanent magnet 27 is formed therein.
Is fixed. The permanent magnet 27 faces the magnetic pole 28 a of the electromagnetic coil body 28 via the actuation film 26. When the AC power is supplied to the electromagnetic coil body 28, the magnetic pole 28a receives N
The pole and the S pole are alternately excited, and the permanent magnet 2
7 moves in and out together with the operation film 26.

In this embodiment, the inner space B is expanded when the operating film 26 is deformed to the projecting side by the operating film 26 moving up and down, so that the inflow valve seat 2
The center part of 4 is deformed inward, and the inflow passage 21 is introduced from the inflow port 21.
Air flows into the internal space B via a. Next, the operating membrane 2
When 6 is deformed to the submerged side, the inner space B is contracted, so that the peripheral portion of the outflow valve seat 25 is deformed outward, the outflow passage 20b is opened, and air flows from the inner space B to the outflow port 22. It flows out and air is discharged from the outlet 22.

In this embodiment, since the flow passage in the vicinity of the inflow valve seat 24 and the outflow valve seat 25 functioning as a one-way valve can have a wide flow cross section, the air discharge amount and discharge strength can be increased. You can In this embodiment, since only one set of the operating film 26, the permanent magnet 27 and the magnetic pole 28a is provided, it is considered that the vibration and noise with respect to the ejection capacity are generally disadvantageous as compared with the first embodiment, but in reality, Has a merit that the operation sound of the valve element can be reduced due to the large distribution cross section, the mechanical efficiency can be increased, and the size can be reduced as compared with the first embodiment.

FIG. 3 shows another structure of the actuating membrane which can be adopted in each of the above embodiments. The actuating film 30 is formed of a bowl-shaped flexible material similarly to the above, and a protruding edge portion 30a having a shaft hole is formed in the center portion on the tip end side thereof. A fixing screw 32 engaged with a permanent magnet 31 is inserted into the shaft hole,
The fixing screw 32 is fastened by a nut 34 inside the operating film 30 via a washer 33.

The permanent magnet 31 is the magnetic pole 3 of the electromagnetic coil body 35.
The actuating film 30 is moved toward and away from the actuating film 30 by the alternating magnetic field of the electromagnetic coil body 35, which is opposed to 5 a. In this embodiment, since the permanent magnet 31 directly faces the magnetic pole 35a without interposing the actuation film 30, the magnetic force can be efficiently received, and the pump can be efficiently operated.

Although the bowl-shaped actuating membrane (diaphragm) is used in each of the above-described embodiments, the actuating membrane does not have to be bowl-shaped, and the deformation thereof causes the air in the flow passage to flow. It may be formed in a flat plate shape or any other shape as long as it has an effect on.

(Third Embodiment) FIG. 4 shows the structure of the third embodiment. In this embodiment, the electromagnetic coil body 40 is arranged at the center and the magnetic poles 40a and 40b are formed at both ends. The magnetic poles 40a and 40b may be devised with yokes or the like so as to have the same polarity as each other, but generally, the magnetic poles formed at both ends of the magnetic core have mutually opposite polarities. A pump body composed of a main body 41 and an actuation film 43 similar to that in the second embodiment is arranged opposite to the magnetic pole 40a, and a pump body composed of the same main body 42 and an actuation film 44 is arranged on the magnetic pole 40b. Arrange oppositely. The permanent magnet 45 fixed to the operating film 43 faces the magnetic pole 40a, and the permanent magnet 4 fixed to the operating film 44 faces the magnetic pole 40b.
6 are opposed to each other.

According to this embodiment, two pump bodies can be driven by one electromagnetic coil body 40, and the polarity of the surface of the permanent magnet 45 facing the magnetic pole 40a and the magnetic pole 40b of the permanent magnet 46 can be changed. By configuring the opposite surfaces to have opposite polarities (when the two magnetic poles have mutually opposite polarities), the moving direction of the permanent magnet 45 and the moving direction of the permanent magnet 46 become opposite directions, and the operating film. Since 43 and 44 operate in the same phase, vibration and noise can be canceled each other.

(Fourth Embodiment) FIG. 5 shows the structure of the fourth embodiment. In this embodiment, a pair of pump bodies including main bodies 51 and 52 and actuation membranes 53 and 54 similar to those of the first embodiment are fixed back to back, and actuation membranes 53 and 5 are provided.
The permanent magnets 55 and 56 are fixed to the magnetic poles 4, respectively, and are arranged to face the magnetic poles 57a and 58a of the electromagnetic coil bodies 57 and 58, respectively.

In this embodiment, it is necessary to provide the two electromagnetic coil bodies 57 and 58, but since vibration and noise are concentrated in the central portion, the vibration of the case body may be changed by devising the mounting structure or the like. It is easy to reduce noise. Further, in this case, since the inflow port and the outflow port of the main body 51 and the main body 52 are arranged so as to be opposite to each other, the flow direction of the air is also opposite to each other, and the vibration or Noise can be further reduced.

In each of the above-described embodiments, one-way valves are provided on the inflow side and the outflow side in order to ensure the discharge of air, but only one of the one-way valves functions as a pump body. Is possible. Further, the permanent magnet can be operated in the same manner even with a simple magnetic body. Further, the same operation can be performed by forming the actuation film itself with a magnetic material.

[0035]

As described above, according to the present invention, since a magnetic material is used for the actuating film itself or the magnetic material is fixed to the actuating film, the conventional drive arm becomes unnecessary, and the size can be reduced. At the same time, it is easy, and since only the flexible actuating membrane moves in and out, vibration and noise are reduced. Further, since the number of parts is reduced and the mounting structure of parts is simplified, the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of the main part of a first embodiment of a fluid pump according to the present invention.

FIG. 2 is a cross-sectional view showing the structure of the main part of a second embodiment of the fluid pump according to the present invention.

FIG. 3 is a transverse cross-sectional view showing a structure for fixing an actuation film and a magnetic body in the above embodiment.

FIG. 4 is a partial cross-sectional plan view showing the structure of the main part of a third embodiment of the fluid pump according to the present invention.

FIG. 5 is a partial cross-sectional plan view showing the structure of the main part of a fourth embodiment of the fluid pump according to the present invention.

FIG. 6 is a partial cross-sectional plan view showing a structure of a main part of a conventional fluid pump.

[Explanation of symbols]

 10 body part 11 inflow port 11a, 12a one way valve 12 outflow port 13,14 working film 15,16 permanent magnet 17,18 electromagnetic coil body 17a, 18a magnetic pole

Claims (5)

[Claims] 1. A main body portion provided with a one-way valve for regulating the flow direction of fluid in the middle of a flow passage from an inlet to an outlet.
A flexible actuation film that is attached to the main body and faces the flow passage, a magnetic material that is adopted in the actuation film itself or is fixed to the actuation film, and an electromagnetic wave having a magnetic pole at a position facing the magnetic material. And a magnetic device is driven together with the actuation film to drive the electromagnetic device so that the fluid flows from the inflow port to the outflow port through the flow passage. And a fluid pump. 2. The pair of actuating films according to claim 1, wherein the actuating film and the magnetic pole are arranged so as to oppose each other so as to be arranged in the projecting and retracting direction, and the pair of actuating films are opposite to each other by the magnetic body and the magnetic pole. A fluid pump, characterized in that the electromagnetic device is driven so as to deform in a direction. 3. The fluid according to claim 2, wherein the pair of magnetic poles are provided at both ends of the electromagnetic device, and the pair of main bodies having the pair of actuation films are provided at both sides of the electromagnetic device. pump. 4. The body according to claim 2, wherein the pair of electromagnetic devices each having the pair of magnetic poles are provided, and the main body portion provided with the pair of actuation films on both sides is provided between the pair of electromagnetic devices. A fluid pump characterized by the above. 5. The pair of electromagnetic devices each having the pair of magnetic poles according to claim 2, wherein a pair of the main body portions with the actuating film facing each other are arranged between the pair of electromagnetic devices. A fluid pump characterized by the above.