JPH0421078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diaphragm air pump. More specifically, the present invention relates to a diaphragm air pump in which the side poles of the electromagnet also serve as the frame of the pump, making it possible to reliably and simplify the structure of the pump, as well as preventing leakage magnetic flux and increasing the effective magnetic speed.

[Problems to be solved by conventional technology and invention]

Conventionally, diaphragm air pumps have been used mainly for oxygen supplementation in fish tanks, household septic tanks, etc., and for sampling test gas in pollution monitoring.

As shown in FIG. 6, such a diaphragm air pump has all elements such as left and right electromagnets 31a, 31b, a pump chamber component 32 such as a diaphragm and a suction valve attached to a frame 30, which serves as a skeleton. It was composed of However, in such a structure, the frame 30
Each component was integrated through a 2-way mechanism, making it mechanically complex and uncertain. In addition, from a magnetic point of view, leakage magnetic flux occurs between the side poles 33 and the frame 30, which is inefficient in terms of effective use of magnetic flux. Furthermore, the shape of the pump inevitably becomes large, and the overall container that houses the pump body, that is, the outer casing, becomes even larger, which is uneconomical.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a diaphragm type air pump in which the drawbacks of the conventional example described above are completely eliminated. That is, an object of the present invention is to provide a diaphragm type air pump that is structurally simple and reliable, allows effective use of magnetic flux, and is compact.

[Means for solving problems]

The diaphragm air pump of the present invention uses electromagnetic vibration of a rod equipped with the permanent magnet based on magnetic interaction between an electromagnet and a permanent magnet.
An electromagnet for an air pump that drives a diaphragm connected to the rod, wherein side poles of the left and right electromagnets constitute a frame of the air pump, and the side poles are connected by a structure with a large magnetic resistance. It is characterized by the fact that

〔Example〕

Next, the diaphragm type air pump of the present invention will be explained based on the drawings.

FIG. 1 is a schematic perspective view of an embodiment of the diaphragm air pump of the present invention, and FIG. 2 is a sectional view including a partial plan view of the embodiment shown in FIG.

In FIG. 1, 2 is a side pole of an electromagnet, and this side pole 2 also has the function of a pump frame.
The side pole 2 has a casing 15 which is a component of the pump chamber.
The main pole 3 into which the coil bobbin and coil bobbin are inserted is directly fixed. As shown in FIG. 1, the fixing method may be to fit a part of the main pole 3 into a slit 4 formed in the side pole 2, to fix it by using screws, or by using an adhesive. Other means may also be used, and are not particularly limited in the present invention. The side poles 2 of the left and right electromagnets are connected at their upper and lower ends (in FIG. 1). In this case,
By connecting, the left and right electromagnets form a strong integrated structure, but in order to prevent a magnetic short circuit between the poles of the left and right electromagnets, it is necessary to connect them with a structure with high magnetic resistance. Here, "the great structure of magnetic resistance"
This may be a structure in which the cross-sectional area of the connecting portion 40 is made small (see Figure 1) so that the magnetic flux is easily saturated, or it may be connected using a member made of a non-magnetic material such as stainless steel, aluminum, or copper alloy. It is also possible to have a structure in which the left and right side poles are connected to PBT.
The structure may be such that they are connected by a pump chamber constituent member such as the like. When the side poles are connected by the pump chamber constituent member, there is no member corresponding to the above-mentioned connecting portion, and the left and right side poles are connected via the pump chamber constituent member.

As is clear from the embodiment shown in FIG. 1, in the air pump of the present invention, the side poles of the electromagnet form the skeleton or frame of the pump, and the electromagnet, which is the fixed part, and the pump chamber part, which is the vibrating part, are separated. By fixing directly to the side poles, it is possible to remove the structure interposed between them as in the conventional example.

Next, other structures and functions of the air pump according to this embodiment will be explained based on FIG. 2.

In FIG. 2, 1 is the core of an electromagnetic coil whose cross section is approximately E-shaped, and the core 1 has a side pole 2 whose cross section is U-shaped, and a main pole 3 provided at the center of the side pole 2. It consists of Main pole 3 and/or side pole 2
As shown in Fig. 3, a laminated iron plate made by laminating 2 to 20 layers of 0.2 to 0.5 mm iron plates is curved, and as shown in Fig. 4, a laminated iron plate with a thickness of 0.5 to 5 mm is used.
As shown in Figure 5, a steel plate with a thickness of 0.2 to 1 mm is made by bending and forming, or by shear forming as shown in Figure 5.
It may be a laminate of ~100 layers. moreover,
Although not shown, it may be formed by bending a laminated iron plate, bending an iron plate, or assembling magnetic powder such as a dust core.
Here, "curving" refers to bending with a radius, and "bending" refers to bending with essentially no radius. Although the main pole 3 is fixed to the side pole 2 by the screw 4 as described above, other fixing methods such as adhesion may be used.

A coil frame 5 made of 6,6 nylon or the like is provided in the core 1 in contact with the main pole 3.
Copper wire is wound around the coil frame 5 to form a coil 6. The core 1, the coil frame 5, and the coil 6 constitute an electromagnetic coil A.

A rod 8 having two permanent magnets 7a and 7b is provided between the pair of electromagnetic coils A.

Both ends of the rod 8 are connected to a diaphragm 10 made of EPDM or the like via a center plate 9. The center plate 9 is provided on both sides of the diaphragm 10, and is an element that pushes and pulls the diaphragm 10 to displace it left and right (in FIG. 2). The center plate 9 and the diaphragm 10 are connected to the nut 11 and the mounting seat 1.
2, and is fixed to the tip of the rod 8 by tightening with a nut 12.

The outer peripheral end portion 13 of the diaphragm 10 is fitted between a diaphragm stand 14 made of PBT or the like and fixed to the side pole 2 with bolts, and a casing 15. The diaphragm 10 and the recess 16 of the casing 15 define an operating chamber.

The casing 15, which is a component of the pump chamber, includes
In addition to the recess 16, there is a suction chamber 17 and a discharge chamber 1.
A communication hole 17a is formed in the partition wall between the suction chamber 17 and the working chamber, and a communication hole 18a is formed in the partition wall between the discharge chamber 18 and the working chamber. Communication hole 17a section and communication hole 18a
A suction valve 17b and a discharge valve 18 are provided in the parts, respectively.
b is provided. Note that 18c is a discharge port to which a tube (not shown) or the like is connected.

The casing 15 is made of PBT etc.
In the embodiment shown in FIG. 2, the diaphragm base 14 is fixed to the side pole with bolts. In addition, in Figure 2, the diaphragm stand and casing on the right side are drawn as a plan view, and although their internal structure is not shown, they are symmetrically the same as the configuration on the left side described above. There is.

Next, the operation of the diaphragm air pump of this embodiment will be briefly explained.

When an alternating current is passed through the electromagnetic coil A, N and S poles are formed at both ends of the electromagnetic coil A in synchronization with changes in the alternating current.
The magnetic poles of the poles alternate, and therefore the main pole and side poles, which are magnetic bodies, are also magnetized in synchronization with changes in the alternating current, and magnetic poles of different polarity appear alternately at their tips.

During a certain half wave of alternating current, if the tip of the main pole is magnetized to the north pole, the tips of the side poles are magnetized to the south pole. In this case, between the permanent magnet 7a and the tip 20a of the side pole, and between the permanent magnet 7b
An attractive force acts between the main pole tip 21b and the main pole tip 21b. . On the other hand, between the permanent magnet 7b and the tip 20b of the side pole, and between the permanent magnet 7a and the tip 21 of the main pole.
A repulsive force acts between a and a. This causes the rod 8 to move to the left in FIG.
Next, when the alternating current changes to the next half wave between the half waves, the repulsive force changes to attractive force, and the attractive force changes to repulsive force, and the rod moves to the right.

In this way, the rod 8 reciprocates in the left and right directions in synchronization with the cycle of the alternating current, and in conjunction with this, the diaphragm 10 vibrates left and right. Then, when the rod 8 moves to the right, the suction valve 17b opens while the discharge valve 18b remains closed, and the suction port 19
a. The fluid sucked into the suction chamber 17 through the vent 19b flows into the working chamber through the communication hole 17a. Then, when the rod 8 moves to the left, the suction valve 17b closes and the discharge valve 1
8b opens, and the fluid in the working chamber passes through the communication hole 18a, passes through the discharge chamber 18, and is discharged from the discharge port 18c. In this manner, the diaphragm air pump of this embodiment is driven.

In the diaphragm air pump of this embodiment having the above configuration, instead of the conventional core made of laminated E-shaped iron plates, a laminated iron plate or a core made by bending or bending the iron plate, or a core made by shearing the iron plate is used. The main pole and/or the side poles are separately produced by laminating them, and the main pole and the side poles are integrated to form a core when assembling the electromagnetic coil. In this case, the distance between the main pole and the side poles is increased, and the tip of at least one of the main pole and the side pole is bent or protruded toward the tip of the other pole, or It is formed and fixed to the body so that the tips of the two poles approach each other. In a core with such a configuration, first of all,
Since the distance between the main pole and the side poles is large, the permeance coefficient becomes small and leakage magnetic flux decreases. next,
Since the tip of the main pole and the tip of the side pole are brought closer to each other to reduce the space between operations, the magnetic flux in the space increases. In this way, it not only reduces leakage magnetic flux, which has traditionally been a negative factor, but also reduces the amount of magnetic flux that directly affects the magnitude of magnetic interaction with permanent magnets.
The spatial magnetic flux can be increased, and the magnetic flux generated by the electromagnetic coil can be used extremely effectively. By effectively utilizing such magnetic flux, a strong vibration force can be obtained, and ultimately the pumping capacity can be greatly increased.
In addition, as in the example shown in Fig. 4, if the bent ends of the side poles are partially cut out to make the heights of the side poles the same, it is possible to further increase the interspace magnetic flux. can.

[Effects of the Invention] (As detailed above, the diaphragm air pump of the present invention can have the following effects.

The side pole of the electromagnet also has a pump skeleton or frame function, and by directly fixing the electromagnet, which is the fixed part, and the pump chamber component, which is the vibrating part, to the side pole, it is possible to create a conventional pump. The frame can be omitted, making the mechanism simple and reliable.

It is possible to prevent the leakage magnetic flux that occurs between the side poles and the frame, increase the effective magnetic flux, and strengthen the magnetic interaction between the electromagnet and the permanent magnet, thereby increasing the pumping capacity.

The conventional frame can be omitted, making it possible to reduce the size and weight.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of an embodiment of the diaphragm air pump of the present invention, FIG. 2 is a sectional view including a partial plan view of the embodiment shown in FIG.
The figures are schematic perspective views showing various aspects of the electromagnet core according to the present invention, and FIG. 6 is a schematic perspective view of a conventional diaphragm type air pump. (Main symbols in the drawings) A: Electromagnetic coil, 1: Core, 2: Side pole, 3: Main pole, 7a, 7b: Permanent magnet, 8: Rod, 10: Diaphragm, 15: Casing.

Claims (1)

[Scope of Claims] 1. An air pump that drives a diaphragm connected to the rod by electromagnetic vibration of the rod equipped with the permanent magnet based on magnetic interaction between an electromagnet and a permanent magnet, A diaphragm type air pump characterized in that side poles of left and right electromagnets constitute a frame of the air pump, and the side poles are connected in a structure with high magnetic resistance. 2. The diaphragm air pump according to claim 1, wherein the side poles of the left and right electromagnets are made of iron plates, and the side poles are connected by iron plates forming a magnetic saturation circuit. 3. The diaphragm air pump according to claim 2, wherein the side poles and the iron plate connecting the side poles have an integral structure. 4. The diaphragm air pump according to claim 1, wherein the side poles of the left and right electromagnets are connected with a non-magnetic material. 5. The diaphragm air pump according to claim 1, wherein the side poles of the left and right electromagnets are connected by a pump chamber constituent member.