JP2004036404A - Electromagnetically vibrating diaphragm pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetically vibrating diaphragm pump for miniaturizing the whole pump. <P>SOLUTION: This electromagnetically vibrating diaphragm pump has an electromagnet part for oppositely arranging electromagnets in a frame, a vibrator inserted into a void part between the electromagnets and fixing a magnet, a diaphragm fixed to left-right end parts of the vibrator and a pump casing part for supporting the diaphragm. A suction valve and a delivery valve in the pump casing part are arranged in mutually opposed side parts of the pump casing part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electromagnetic vibration type diaphragm pump. More specifically, the present invention relates to an electromagnetic vibration type diaphragm pump mainly used for sucking / discharging air into / from an indoor air mat or an air bed, supplementing oxygen in a fish tank or a household septic tank, or sampling a test gas in pollution monitoring.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a diaphragm-type pump that continues to vibrate and cooperate with a spring force of a diaphragm by alternating electromagnetic force generated by alternating current conduction of an electromagnet. As shown in FIG. 6, for example, this pump is arranged in an electromagnet portion 101 composed of an iron core 101a and a winding coil portion 101b which are opposed to each other in a frame 100, and a gap S between the iron core 101a. A vibrator 153 provided with a magnet 152, a diaphragm 154 connected to both ends of the vibrator 153, and a pump casing 155 fixed to both ends of the electromagnet unit 101, respectively.
[0003]
The pump casing section 155 further has a pump section including a suction chamber 156, a discharge chamber 157, and a compression chamber (pump chamber) 158. In addition, a suction port 159 and a suction valve 160 for allowing air to flow from the suction chamber 156 to the compression chamber 158 are provided, and a discharge port 161 and a discharge valve 162 for flowing compressed air from the compression chamber 158 to the discharge chamber 157 are provided. It has.
[0004]
[Problems to be solved by the invention]
However, in the conventional pump, the suction valve 160 and the discharge valve 162 are attached to the bottom (pump head) of the compression chamber 158 parallel to the diaphragm 154. Therefore, the suction chamber 156 and the discharge chamber 157 occupy the same volume as the compression chamber 158, and the lateral dimension of the entire pump is the total size of the compression chamber 158, the suction chamber 156, and the discharge chamber 157. There is a problem that the whole pump becomes long and it is difficult to reduce the size.
[0005]
In view of the circumstances described above, an object of the present invention is to provide an electromagnetic vibration type diaphragm pump that can reduce the size of the entire pump.
[0006]
[Means for Solving the Problems]
An electromagnetic vibration type diaphragm pump according to the present invention includes: an electromagnet portion for arranging electromagnets facing each other in a frame; a vibrator fixed to the magnet while being inserted into a gap between the electromagnets; and left and right ends of the vibrator. An electromagnetic vibration type diaphragm pump having a diaphragm fixed to a part and a pump casing part supporting the diaphragm, wherein a suction valve and a discharge valve in the pump casing part are provided on opposite sides of the pump casing part. It is characterized by being arranged.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an electromagnetic vibration type diaphragm pump according to the present invention will be described with reference to the accompanying drawings.
[0008]
As shown in FIG. 1, an electromagnetic vibration type diaphragm pump according to one embodiment of the present invention includes a pump body cover 1, an electromagnet unit 2, a vibrator 3, and a diaphragm fixed to left and right ends of the vibrator 3. 4 and a pump casing 5 supporting the diaphragm 4. The pump casing section 5 further has a pump section including a suction chamber 6, a discharge chamber 7, and a compression chamber 8. A suction port 9 for allowing air to flow from the suction chamber 6 to the compression chamber 8 and a suction valve 10, and a discharge port 11 and a discharge valve 12 for flowing compressed air from the compression chamber 8 to the discharge chamber 7 are provided. It has. The suction valve 10 and the discharge valve 12 in the pump casing section 5 are arranged around the bottom 5 a of the compression chamber 8, the sides of the pump casing section 5 facing each other, and in this embodiment, substantially perpendicular to the diaphragm 4. It is arranged on the side part 5b. In the present embodiment, the suction valve 10 and the discharge valve 12 are arranged on the side 5b substantially perpendicular to the diaphragm 4, but the present invention is not limited to this, and for example, It is also possible to dispose them on the sides where the distance between them becomes smaller (approaching).
[0009]
As the electromagnet part 2, an electromagnet 16 including a frame 13, a pair of E-shaped iron cores 14 arranged opposite to each other in the frame 13, and a winding coil part 15 incorporated in the iron core 14 is used. I have. The frame 13 is a molded body formed by aluminum die casting or extrusion. The vibrator 3 is inserted into the gap S between the electromagnets 16, and is a four-magnet vibrator in which the magnets 17 are fixed to the non-magnetic body 18 by four blocks (sets) at predetermined intervals. The four magnets 17 are flat ferrite magnets or rare earth magnets. The vibrator 3 is fixed to the diaphragm 4 by holding fittings 19 on the end screw portion 18 a of the non-magnetic body 18, and is supported in the electromagnet portion 2. The width of the two magnets 17 at both ends of the vibrator 3 is about half the width of the two magnets 17 at the center.
[0010]
The pump according to the present embodiment suctions and discharges a fluid by utilizing the vibration of the vibrator 3 having the magnet 17 based on the magnetic interaction between the electromagnet 16 and the magnet 17.
[0011]
The pump according to the present embodiment is provided with a pump body cover 1 to cover the entire pump body and cut off noise in terms of external design, but since the cover 1 has no relation to the performance, , Can be omitted.
[0012]
Further, although the vibrator 3 is a four-magnet vibrator, the present invention is not limited to this, and a two-magnet vibrator in which two flat magnets are arranged at a predetermined interval. can do. Although the pair of electromagnets 16 are two-dimensional electromagnets, a pair of E-shaped small-diameter iron cores (auxiliary cores) are disposed opposite to each other, and are arranged at positions orthogonal to the pair of E-shaped small-diameter iron cores. It is also possible to use a three-dimensional electromagnet composed of a pair of E-shaped large-diameter iron cores (main iron cores) and a winding coil unit incorporated in the inner peripheral recess of the E-shaped large-diameter iron core. When this three-dimensional electromagnet is used, the vibrator has a cubic magnet shape.
[0013]
By arranging the suction valve 10 and the discharge valve 12 on the side 5b substantially perpendicular to the diaphragm 4, the pump according to the present embodiment can be seen from the comparison between FIG. 1 and FIG. The dimension (length in the left-right direction of FIG. 1) is substantially shorter than the horizontal dimension (length in the left-right direction of FIG. 6) of the conventional pump, which is equivalent to one pump casing part 155. For this reason, in the present embodiment, the overall size of the pump can be reduced by reducing the size of the pump casing 5. In FIG. 1, the length of the iron core 14 is longer than the length of the iron core of the two-magnet vibrator type pump because four magnets 17 are used in terms of structure. The overall size of the pump can be smaller than conventional pumps. When a two-magnet vibrator is used, if the core length is reduced by changing the mounting dimensions of the core, further reduction is possible.
[0014]
Since the pump casing of the present embodiment can be easily replaced with a conventional pump casing, it is easy to modify the conventional pump. The noise can be reduced by increasing the thickness of the bottom or increasing the rigidity by attaching a rib to the bottom.
[0015]
Further, in the present embodiment, the frame 13 is formed into a molded body formed by aluminum die casting or the like. However, the present invention is not limited to this, and may be a resin molded body. That is, as shown in FIGS. 3 and 4, the frame 21 can be a resin molded body molded on the outer surface of the electromagnet 16. As a material of the frame 21, it is desirable to use a heat-resistant, low-shrinkage-rate BMC (bulk mold compound), which is a molding material. For example, unsaturated polyester-based BMC can be used. In FIG. 3, S is a gap, and the oscillator and the diaphragm are omitted for easy understanding.
[0016]
By forming the frame 21 as a resin molded body, the first ventilation tank portion 23 and the second ventilation tank portion 24 connected to the pump chambers of the left and right pump casing portions 22 and the ring-shaped groove 25 for mounting the diaphragm 4 are simultaneously molded. can do. A lid 26 having a suction port 26a is attached to the first ventilation tank section 23, and a lid 27 having a discharge port 27a is attached to the second ventilation tank section 24.
[0017]
The pump casing 22 includes a pump casing body 29 integrally formed with a mounting leg 28, a suction port 30, an upper side 32 where a suction valve 31 is disposed, and a discharge port 33. And a lower portion 32 on which the discharge valve 34 is disposed, and an outer portion 35 for forming a suction chamber and a discharge chamber. The side portion 32 and the outer portion 35 are attached by bonding or the like. The suction chamber and the first ventilation tank section 23 and the discharge chamber and the second ventilation tank section 24 connected to the pump chamber of the pump casing section 22 are formed in the frame 21 and the pump casing section 22, respectively. It communicates by 38. Further, by forming the reinforcing rib 39 on the back surface of the bottom portion 22a, rigidity is increased and noise is reduced.
[0018]
In the present embodiment, by arranging the suction valve 31 and the discharge valve 34 on the side 32 substantially perpendicular to the diaphragm, the entire pump can be reduced in size, and the frame 21 can be made of a resin molded body. Since the intake passage 36 and the exhaust passage 37 are formed inside, the appearance is improved.
[0019]
In this embodiment, a metal leg cover 42 having a pump mounting leg 41 as shown in FIG. 5 is attached so as to cover the entire pump casing portion without the mounting leg 28. By doing so, the sound insulation effect can be improved, and the noise can be further reduced.
[0020]
【The invention's effect】
As described above, according to the present invention, the volume of the pumps on both sides can be covered by the volume of the conventional one-sided pump, so that the entire pump can be downsized. Thereby, the whole pump system can be compactly assembled.
[0021]
Further, since the mounting leg of the pump is integrally formed with the pump casing portion by resin molding, the number of parts can be reduced and the cost can be reduced. Further, the noise can be further reduced by attaching the metallic cover with the legs to the pump casing.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an electromagnetic vibration type diaphragm pump according to the present invention.
FIG. 2 is a side view of an intake valve and a discharge valve of FIG. 1;
FIG. 3 is an exploded perspective view showing another embodiment of the electromagnetic vibration type diaphragm pump of the present invention.
FIG. 4 is an exploded perspective view of the pump casing of FIG. 3;
FIG. 5 is a perspective view showing an example of a legged cover.
FIG. 6 is a cross-sectional view showing a conventional electromagnetic vibration type diaphragm pump.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pump main body cover 2 Electromagnet part 3 Vibrator 4 Diaphragm 5, 22 Pump casing part 5a, 22a Bottom part 5b, 32 Side part 6 Suction chamber 7 Discharge chamber 8 Compression chamber 9, 30 Suction port 10, 31 Suction valve 11, 33 Discharge Outlets 12, 34 Discharge valves 13, 21 Frame 14 Iron core 15 Winding coil section 16 Electromagnet 17 Magnet 18 Non-magnetic body 18a End screw section 19 Holding fittings 23 First ventilation tank section 24 Second ventilation tank section 25 Ring shape Grooves 26, 27 Lid 26a Suction port 27a Discharge port 28 Mounting leg 29 Pump casing body 35 Outer portions 36, 37, 38 Passage 69 Reinforcement rib 41 Leg 42 Legged cover

Claims (5)

An electromagnet section for disposing an electromagnet in the frame, a vibrator to be inserted into a gap between the electromagnets and fixing the magnet, a diaphragm fixed to left and right ends of the vibrator, and the diaphragm And a pump casing section supporting the pump casing section, wherein the suction valve and the discharge valve in the pump casing section are arranged on mutually opposite sides of the pump casing section. The diaphragm pump of claim 1 wherein said side is substantially perpendicular to said diaphragm. 3. The diaphragm pump according to claim 1, wherein the frame is a resin molded body molded on an outer surface of the electromagnet, and an intake tank and an exhaust tank are formed in the resin molded body. The electromagnetic vibration type diaphragm pump according to claim 3, wherein a mounting leg is integrally formed with the pump casing. 4. An electromagnetic vibration type diaphragm pump according to claim 3, wherein a cover with legs covering the whole of the pump casing is mounted.

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